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SATA: Blacklisting of systems that spin off disks during ACPI power off
[linux-2.6/verdex.git] / include / linux / libata.h
blobbca3ba25f52ac3cba6c983eb66c0e78ce3074fd9
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_NO_POWEROFF_SPINDOWN = (1 << 11), /* don't spindown before poweroff */
191 ATA_FLAG_NO_HIBERNATE_SPINDOWN = (1 << 12), /* don't spindown before hibernation */
192 ATA_FLAG_DEBUGMSG = (1 << 13),
193 ATA_FLAG_IGN_SIMPLEX = (1 << 15), /* ignore SIMPLEX */
194 ATA_FLAG_NO_IORDY = (1 << 16), /* controller lacks iordy */
195 ATA_FLAG_ACPI_SATA = (1 << 17), /* need native SATA ACPI layout */
196 ATA_FLAG_AN = (1 << 18), /* controller supports AN */
197 ATA_FLAG_PMP = (1 << 19), /* controller supports PMP */
198 ATA_FLAG_IPM = (1 << 20), /* driver can handle IPM */
199 ATA_FLAG_EM = (1 << 21), /* driver supports enclosure
200 * management */
201 ATA_FLAG_SW_ACTIVITY = (1 << 22), /* driver supports sw activity
202 * led */
203
204 /* The following flag belongs to ap->pflags but is kept in
205 * ap->flags because it's referenced in many LLDs and will be
206 * removed in not-too-distant future.
207 */
208 ATA_FLAG_DISABLED = (1 << 23), /* port is disabled, ignore it */
209
210 /* bits 24:31 of ap->flags are reserved for LLD specific flags */
211
212 /* struct ata_port pflags */
213 ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */
214 ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */
215 ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */
216 ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */
217 ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */
218 ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */
219 ATA_PFLAG_INITIALIZING = (1 << 7), /* being initialized, don't touch */
220 ATA_PFLAG_RESETTING = (1 << 8), /* reset in progress */
221 ATA_PFLAG_UNLOADING = (1 << 9), /* driver is being unloaded */
222 ATA_PFLAG_UNLOADED = (1 << 10), /* driver is unloaded */
223
224 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */
225 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */
226 ATA_PFLAG_INIT_GTM_VALID = (1 << 19), /* initial gtm data valid */
227
228 /* struct ata_queued_cmd flags */
229 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */
230 ATA_QCFLAG_DMAMAP = (1 << 1), /* SG table is DMA mapped */
231 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */
232 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */
233 ATA_QCFLAG_CLEAR_EXCL = (1 << 5), /* clear excl_link on completion */
234 ATA_QCFLAG_QUIET = (1 << 6), /* don't report device error */
235 ATA_QCFLAG_RETRY = (1 << 7), /* retry after failure */
236
237 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */
238 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */
239 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */
240
241 /* host set flags */
242 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */
243 ATA_HOST_STARTED = (1 << 1), /* Host started */
244 ATA_HOST_PARALLEL_SCAN = (1 << 2), /* Ports on this host can be scanned in parallel */
245
246 /* bits 24:31 of host->flags are reserved for LLD specific flags */
247
248 /* various lengths of time */
249 ATA_TMOUT_BOOT = 30000, /* heuristic */
250 ATA_TMOUT_BOOT_QUICK = 7000, /* heuristic */
251 ATA_TMOUT_INTERNAL_QUICK = 5000,
252 ATA_TMOUT_MAX_PARK = 30000,
253
254 /* FIXME: GoVault needs 2s but we can't afford that without
255 * parallel probing. 800ms is enough for iVDR disk
256 * HHD424020F7SV00. Increase to 2secs when parallel probing
257 * is in place.
258 */
259 ATA_TMOUT_FF_WAIT = 800,
260
261 /* Spec mandates to wait for ">= 2ms" before checking status
262 * after reset. We wait 150ms, because that was the magic
263 * delay used for ATAPI devices in Hale Landis's ATADRVR, for
264 * the period of time between when the ATA command register is
265 * written, and then status is checked. Because waiting for
266 * "a while" before checking status is fine, post SRST, we
267 * perform this magic delay here as well.
268 *
269 * Old drivers/ide uses the 2mS rule and then waits for ready.
270 */
271 ATA_WAIT_AFTER_RESET = 150,
272
273 /* If PMP is supported, we have to do follow-up SRST. As some
274 * PMPs don't send D2H Reg FIS after hardreset, LLDs are
275 * advised to wait only for the following duration before
276 * doing SRST.
277 */
278 ATA_TMOUT_PMP_SRST_WAIT = 1000,
279
280 /* ATA bus states */
281 BUS_UNKNOWN = 0,
282 BUS_DMA = 1,
283 BUS_IDLE = 2,
284 BUS_NOINTR = 3,
285 BUS_NODATA = 4,
286 BUS_TIMER = 5,
287 BUS_PIO = 6,
288 BUS_EDD = 7,
289 BUS_IDENTIFY = 8,
290 BUS_PACKET = 9,
291
292 /* SATA port states */
293 PORT_UNKNOWN = 0,
294 PORT_ENABLED = 1,
295 PORT_DISABLED = 2,
296
297 /* encoding various smaller bitmaps into a single
298 * unsigned long bitmap
299 */
300 ATA_NR_PIO_MODES = 7,
301 ATA_NR_MWDMA_MODES = 5,
302 ATA_NR_UDMA_MODES = 8,
303
304 ATA_SHIFT_PIO = 0,
305 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_NR_PIO_MODES,
306 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_NR_MWDMA_MODES,
307
308 /* size of buffer to pad xfers ending on unaligned boundaries */
309 ATA_DMA_PAD_SZ = 4,
310
311 /* ering size */
312 ATA_ERING_SIZE = 32,
313
314 /* return values for ->qc_defer */
315 ATA_DEFER_LINK = 1,
316 ATA_DEFER_PORT = 2,
317
318 /* desc_len for ata_eh_info and context */
319 ATA_EH_DESC_LEN = 80,
320
321 /* reset / recovery action types */
322 ATA_EH_REVALIDATE = (1 << 0),
323 ATA_EH_SOFTRESET = (1 << 1), /* meaningful only in ->prereset */
324 ATA_EH_HARDRESET = (1 << 2), /* meaningful only in ->prereset */
325 ATA_EH_RESET = ATA_EH_SOFTRESET | ATA_EH_HARDRESET,
326 ATA_EH_ENABLE_LINK = (1 << 3),
327 ATA_EH_LPM = (1 << 4), /* link power management action */
328 ATA_EH_PARK = (1 << 5), /* unload heads and stop I/O */
329
330 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE | ATA_EH_PARK,
331 ATA_EH_ALL_ACTIONS = ATA_EH_REVALIDATE | ATA_EH_RESET |
332 ATA_EH_ENABLE_LINK | ATA_EH_LPM,
333
334 /* ata_eh_info->flags */
335 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */
336 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */
337 ATA_EHI_QUIET = (1 << 3), /* be quiet */
338
339 ATA_EHI_DID_SOFTRESET = (1 << 16), /* already soft-reset this port */
340 ATA_EHI_DID_HARDRESET = (1 << 17), /* already soft-reset this port */
341 ATA_EHI_PRINTINFO = (1 << 18), /* print configuration info */
342 ATA_EHI_SETMODE = (1 << 19), /* configure transfer mode */
343 ATA_EHI_POST_SETMODE = (1 << 20), /* revaildating after setmode */
344
345 ATA_EHI_DID_RESET = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET,
346
347 /* mask of flags to transfer *to* the slave link */
348 ATA_EHI_TO_SLAVE_MASK = ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET,
349
350 /* max tries if error condition is still set after ->error_handler */
351 ATA_EH_MAX_TRIES = 5,
352
353 /* how hard are we gonna try to probe/recover devices */
354 ATA_PROBE_MAX_TRIES = 3,
355 ATA_EH_DEV_TRIES = 3,
356 ATA_EH_PMP_TRIES = 5,
357 ATA_EH_PMP_LINK_TRIES = 3,
358
359 SATA_PMP_RW_TIMEOUT = 3000, /* PMP read/write timeout */
360
361 /* This should match the actual table size of
362 * ata_eh_cmd_timeout_table in libata-eh.c.
363 */
364 ATA_EH_CMD_TIMEOUT_TABLE_SIZE = 5,
365
366 /* Horkage types. May be set by libata or controller on drives
367 (some horkage may be drive/controller pair dependant */
368
369 ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */
370 ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */
371 ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */
372 ATA_HORKAGE_MAX_SEC_128 = (1 << 3), /* Limit max sects to 128 */
373 ATA_HORKAGE_BROKEN_HPA = (1 << 4), /* Broken HPA */
374 ATA_HORKAGE_DISABLE = (1 << 5), /* Disable it */
375 ATA_HORKAGE_HPA_SIZE = (1 << 6), /* native size off by one */
376 ATA_HORKAGE_IPM = (1 << 7), /* Link PM problems */
377 ATA_HORKAGE_IVB = (1 << 8), /* cbl det validity bit bugs */
378 ATA_HORKAGE_STUCK_ERR = (1 << 9), /* stuck ERR on next PACKET */
379 ATA_HORKAGE_BRIDGE_OK = (1 << 10), /* no bridge limits */
380 ATA_HORKAGE_ATAPI_MOD16_DMA = (1 << 11), /* use ATAPI DMA for commands
381 not multiple of 16 bytes */
382 ATA_HORKAGE_FIRMWARE_WARN = (1 << 12), /* firwmare update warning */
383
384 /* DMA mask for user DMA control: User visible values; DO NOT
385 renumber */
386 ATA_DMA_MASK_ATA = (1 << 0), /* DMA on ATA Disk */
387 ATA_DMA_MASK_ATAPI = (1 << 1), /* DMA on ATAPI */
388 ATA_DMA_MASK_CFA = (1 << 2), /* DMA on CF Card */
389
390 /* ATAPI command types */
391 ATAPI_READ = 0, /* READs */
392 ATAPI_WRITE = 1, /* WRITEs */
393 ATAPI_READ_CD = 2, /* READ CD [MSF] */
394 ATAPI_PASS_THRU = 3, /* SAT pass-thru */
395 ATAPI_MISC = 4, /* the rest */
396
397 /* Timing constants */
398 ATA_TIMING_SETUP = (1 << 0),
399 ATA_TIMING_ACT8B = (1 << 1),
400 ATA_TIMING_REC8B = (1 << 2),
401 ATA_TIMING_CYC8B = (1 << 3),
402 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
403 ATA_TIMING_CYC8B,
404 ATA_TIMING_ACTIVE = (1 << 4),
405 ATA_TIMING_RECOVER = (1 << 5),
406 ATA_TIMING_DMACK_HOLD = (1 << 6),
407 ATA_TIMING_CYCLE = (1 << 7),
408 ATA_TIMING_UDMA = (1 << 8),
409 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
410 ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
411 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
412 ATA_TIMING_DMACK_HOLD | ATA_TIMING_CYCLE |
413 ATA_TIMING_UDMA,
414 };
415
416 enum ata_xfer_mask {
417 ATA_MASK_PIO = ((1LU << ATA_NR_PIO_MODES) - 1)
418 << ATA_SHIFT_PIO,
419 ATA_MASK_MWDMA = ((1LU << ATA_NR_MWDMA_MODES) - 1)
420 << ATA_SHIFT_MWDMA,
421 ATA_MASK_UDMA = ((1LU << ATA_NR_UDMA_MODES) - 1)
422 << ATA_SHIFT_UDMA,
423 };
424
425 enum hsm_task_states {
426 HSM_ST_IDLE, /* no command on going */
427 HSM_ST_FIRST, /* (waiting the device to)
428 write CDB or first data block */
429 HSM_ST, /* (waiting the device to) transfer data */
430 HSM_ST_LAST, /* (waiting the device to) complete command */
431 HSM_ST_ERR, /* error */
432 };
433
434 enum ata_completion_errors {
435 AC_ERR_DEV = (1 << 0), /* device reported error */
436 AC_ERR_HSM = (1 << 1), /* host state machine violation */
437 AC_ERR_TIMEOUT = (1 << 2), /* timeout */
438 AC_ERR_MEDIA = (1 << 3), /* media error */
439 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */
440 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */
441 AC_ERR_SYSTEM = (1 << 6), /* system error */
442 AC_ERR_INVALID = (1 << 7), /* invalid argument */
443 AC_ERR_OTHER = (1 << 8), /* unknown */
444 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */
445 AC_ERR_NCQ = (1 << 10), /* marker for offending NCQ qc */
446 };
447
448 /* forward declarations */
449 struct scsi_device;
450 struct ata_port_operations;
451 struct ata_port;
452 struct ata_link;
453 struct ata_queued_cmd;
454
455 /* typedefs */
456 typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
457 typedef int (*ata_prereset_fn_t)(struct ata_link *link, unsigned long deadline);
458 typedef int (*ata_reset_fn_t)(struct ata_link *link, unsigned int *classes,
459 unsigned long deadline);
460 typedef void (*ata_postreset_fn_t)(struct ata_link *link, unsigned int *classes);
461
462 /*
463 * host pm policy: If you alter this, you also need to alter libata-scsi.c
464 * (for the ascii descriptions)
465 */
466 enum link_pm {
467 NOT_AVAILABLE,
468 MIN_POWER,
469 MAX_PERFORMANCE,
470 MEDIUM_POWER,
471 };
472 extern struct device_attribute dev_attr_link_power_management_policy;
473 extern struct device_attribute dev_attr_unload_heads;
474 extern struct device_attribute dev_attr_em_message_type;
475 extern struct device_attribute dev_attr_em_message;
476 extern struct device_attribute dev_attr_sw_activity;
477
478 enum sw_activity {
479 OFF,
480 BLINK_ON,
481 BLINK_OFF,
482 };
483
484 #ifdef CONFIG_ATA_SFF
485 struct ata_ioports {
486 void __iomem *cmd_addr;
487 void __iomem *data_addr;
488 void __iomem *error_addr;
489 void __iomem *feature_addr;
490 void __iomem *nsect_addr;
491 void __iomem *lbal_addr;
492 void __iomem *lbam_addr;
493 void __iomem *lbah_addr;
494 void __iomem *device_addr;
495 void __iomem *status_addr;
496 void __iomem *command_addr;
497 void __iomem *altstatus_addr;
498 void __iomem *ctl_addr;
499 void __iomem *bmdma_addr;
500 void __iomem *scr_addr;
501 };
502 #endif /* CONFIG_ATA_SFF */
503
504 struct ata_host {
505 spinlock_t lock;
506 struct device *dev;
507 void __iomem * const *iomap;
508 unsigned int n_ports;
509 void *private_data;
510 struct ata_port_operations *ops;
511 unsigned long flags;
512 #ifdef CONFIG_ATA_ACPI
513 acpi_handle acpi_handle;
514 #endif
515 struct ata_port *simplex_claimed; /* channel owning the DMA */
516 struct ata_port *ports[0];
517 };
518
519 struct ata_queued_cmd {
520 struct ata_port *ap;
521 struct ata_device *dev;
522
523 struct scsi_cmnd *scsicmd;
524 void (*scsidone)(struct scsi_cmnd *);
525
526 struct ata_taskfile tf;
527 u8 cdb[ATAPI_CDB_LEN];
528
529 unsigned long flags; /* ATA_QCFLAG_xxx */
530 unsigned int tag;
531 unsigned int n_elem;
532
533 int dma_dir;
534
535 unsigned int sect_size;
536
537 unsigned int nbytes;
538 unsigned int extrabytes;
539 unsigned int curbytes;
540
541 struct scatterlist *cursg;
542 unsigned int cursg_ofs;
543
544 struct scatterlist sgent;
545
546 struct scatterlist *sg;
547
548 unsigned int err_mask;
549 struct ata_taskfile result_tf;
550 ata_qc_cb_t complete_fn;
551
552 void *private_data;
553 void *lldd_task;
554 };
555
556 struct ata_port_stats {
557 unsigned long unhandled_irq;
558 unsigned long idle_irq;
559 unsigned long rw_reqbuf;
560 };
561
562 struct ata_ering_entry {
563 unsigned int eflags;
564 unsigned int err_mask;
565 u64 timestamp;
566 };
567
568 struct ata_ering {
569 int cursor;
570 struct ata_ering_entry ring[ATA_ERING_SIZE];
571 };
572
573 struct ata_device {
574 struct ata_link *link;
575 unsigned int devno; /* 0 or 1 */
576 unsigned int horkage; /* List of broken features */
577 unsigned long flags; /* ATA_DFLAG_xxx */
578 struct scsi_device *sdev; /* attached SCSI device */
579 #ifdef CONFIG_ATA_ACPI
580 acpi_handle acpi_handle;
581 union acpi_object *gtf_cache;
582 #endif
583 /* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */
584 u64 n_sectors; /* size of device, if ATA */
585 unsigned int class; /* ATA_DEV_xxx */
586 unsigned long unpark_deadline;
587
588 u8 pio_mode;
589 u8 dma_mode;
590 u8 xfer_mode;
591 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
592
593 unsigned int multi_count; /* sectors count for
594 READ/WRITE MULTIPLE */
595 unsigned int max_sectors; /* per-device max sectors */
596 unsigned int cdb_len;
597
598 /* per-dev xfer mask */
599 unsigned long pio_mask;
600 unsigned long mwdma_mask;
601 unsigned long udma_mask;
602
603 /* for CHS addressing */
604 u16 cylinders; /* Number of cylinders */
605 u16 heads; /* Number of heads */
606 u16 sectors; /* Number of sectors per track */
607
608 /* error history */
609 int spdn_cnt;
610 struct ata_ering ering;
611
612 union {
613 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
614 u32 gscr[SATA_PMP_GSCR_DWORDS]; /* PMP GSCR block */
615 };
616 };
617
618 /* Offset into struct ata_device. Fields above it are maintained
619 * acress device init. Fields below are zeroed.
620 */
621 #define ATA_DEVICE_CLEAR_OFFSET offsetof(struct ata_device, n_sectors)
622
623 struct ata_eh_info {
624 struct ata_device *dev; /* offending device */
625 u32 serror; /* SError from LLDD */
626 unsigned int err_mask; /* port-wide err_mask */
627 unsigned int action; /* ATA_EH_* action mask */
628 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */
629 unsigned int flags; /* ATA_EHI_* flags */
630
631 unsigned int probe_mask;
632
633 char desc[ATA_EH_DESC_LEN];
634 int desc_len;
635 };
636
637 struct ata_eh_context {
638 struct ata_eh_info i;
639 int tries[ATA_MAX_DEVICES];
640 int cmd_timeout_idx[ATA_MAX_DEVICES]
641 [ATA_EH_CMD_TIMEOUT_TABLE_SIZE];
642 unsigned int classes[ATA_MAX_DEVICES];
643 unsigned int did_probe_mask;
644 unsigned int unloaded_mask;
645 unsigned int saved_ncq_enabled;
646 u8 saved_xfer_mode[ATA_MAX_DEVICES];
647 /* timestamp for the last reset attempt or success */
648 unsigned long last_reset;
649 };
650
651 struct ata_acpi_drive
652 {
653 u32 pio;
654 u32 dma;
655 } __packed;
656
657 struct ata_acpi_gtm {
658 struct ata_acpi_drive drive[2];
659 u32 flags;
660 } __packed;
661
662 struct ata_link {
663 struct ata_port *ap;
664 int pmp; /* port multiplier port # */
665
666 unsigned int active_tag; /* active tag on this link */
667 u32 sactive; /* active NCQ commands */
668
669 unsigned int flags; /* ATA_LFLAG_xxx */
670
671 u32 saved_scontrol; /* SControl on probe */
672 unsigned int hw_sata_spd_limit;
673 unsigned int sata_spd_limit;
674 unsigned int sata_spd; /* current SATA PHY speed */
675
676 /* record runtime error info, protected by host_set lock */
677 struct ata_eh_info eh_info;
678 /* EH context */
679 struct ata_eh_context eh_context;
680
681 struct ata_device device[ATA_MAX_DEVICES];
682 };
683
684 struct ata_port {
685 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */
686 struct ata_port_operations *ops;
687 spinlock_t *lock;
688 unsigned long flags; /* ATA_FLAG_xxx */
689 unsigned int pflags; /* ATA_PFLAG_xxx */
690 unsigned int print_id; /* user visible unique port ID */
691 unsigned int port_no; /* 0 based port no. inside the host */
692
693 struct ata_prd *prd; /* our SG list */
694 dma_addr_t prd_dma; /* and its DMA mapping */
695
696 #ifdef CONFIG_ATA_SFF
697 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
698 #endif /* CONFIG_ATA_SFF */
699
700 u8 ctl; /* cache of ATA control register */
701 u8 last_ctl; /* Cache last written value */
702 unsigned int pio_mask;
703 unsigned int mwdma_mask;
704 unsigned int udma_mask;
705 unsigned int cbl; /* cable type; ATA_CBL_xxx */
706
707 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
708 unsigned long qc_allocated;
709 unsigned int qc_active;
710 int nr_active_links; /* #links with active qcs */
711
712 struct ata_link link; /* host default link */
713 struct ata_link *slave_link; /* see ata_slave_link_init() */
714
715 int nr_pmp_links; /* nr of available PMP links */
716 struct ata_link *pmp_link; /* array of PMP links */
717 struct ata_link *excl_link; /* for PMP qc exclusion */
718
719 struct ata_port_stats stats;
720 struct ata_host *host;
721 struct device *dev;
722
723 void *port_task_data;
724 struct delayed_work port_task;
725 struct delayed_work hotplug_task;
726 struct work_struct scsi_rescan_task;
727
728 unsigned int hsm_task_state;
729
730 u32 msg_enable;
731 struct list_head eh_done_q;
732 wait_queue_head_t eh_wait_q;
733 int eh_tries;
734 struct completion park_req_pending;
735
736 pm_message_t pm_mesg;
737 int *pm_result;
738 enum link_pm pm_policy;
739
740 struct timer_list fastdrain_timer;
741 unsigned long fastdrain_cnt;
742
743 int em_message_type;
744 void *private_data;
745
746 #ifdef CONFIG_ATA_ACPI
747 acpi_handle acpi_handle;
748 struct ata_acpi_gtm __acpi_init_gtm; /* use ata_acpi_init_gtm() */
749 #endif
750 u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */
751 };
752
753 /* The following initializer overrides a method to NULL whether one of
754 * its parent has the method defined or not. This is equivalent to
755 * ERR_PTR(-ENOENT). Unfortunately, ERR_PTR doesn't render a constant
756 * expression and thus can't be used as an initializer.
757 */
758 #define ATA_OP_NULL (void *)(unsigned long)(-ENOENT)
759
760 struct ata_port_operations {
761 /*
762 * Command execution
763 */
764 int (*qc_defer)(struct ata_queued_cmd *qc);
765 int (*check_atapi_dma)(struct ata_queued_cmd *qc);
766 void (*qc_prep)(struct ata_queued_cmd *qc);
767 unsigned int (*qc_issue)(struct ata_queued_cmd *qc);
768 bool (*qc_fill_rtf)(struct ata_queued_cmd *qc);
769
770 /*
771 * Configuration and exception handling
772 */
773 int (*cable_detect)(struct ata_port *ap);
774 unsigned long (*mode_filter)(struct ata_device *dev, unsigned long xfer_mask);
775 void (*set_piomode)(struct ata_port *ap, struct ata_device *dev);
776 void (*set_dmamode)(struct ata_port *ap, struct ata_device *dev);
777 int (*set_mode)(struct ata_link *link, struct ata_device **r_failed_dev);
778 unsigned int (*read_id)(struct ata_device *dev, struct ata_taskfile *tf, u16 *id);
779
780 void (*dev_config)(struct ata_device *dev);
781
782 void (*freeze)(struct ata_port *ap);
783 void (*thaw)(struct ata_port *ap);
784 ata_prereset_fn_t prereset;
785 ata_reset_fn_t softreset;
786 ata_reset_fn_t hardreset;
787 ata_postreset_fn_t postreset;
788 ata_prereset_fn_t pmp_prereset;
789 ata_reset_fn_t pmp_softreset;
790 ata_reset_fn_t pmp_hardreset;
791 ata_postreset_fn_t pmp_postreset;
792 void (*error_handler)(struct ata_port *ap);
793 void (*post_internal_cmd)(struct ata_queued_cmd *qc);
794
795 /*
796 * Optional features
797 */
798 int (*scr_read)(struct ata_link *link, unsigned int sc_reg, u32 *val);
799 int (*scr_write)(struct ata_link *link, unsigned int sc_reg, u32 val);
800 void (*pmp_attach)(struct ata_port *ap);
801 void (*pmp_detach)(struct ata_port *ap);
802 int (*enable_pm)(struct ata_port *ap, enum link_pm policy);
803 void (*disable_pm)(struct ata_port *ap);
804
805 /*
806 * Start, stop, suspend and resume
807 */
808 int (*port_suspend)(struct ata_port *ap, pm_message_t mesg);
809 int (*port_resume)(struct ata_port *ap);
810 int (*port_start)(struct ata_port *ap);
811 void (*port_stop)(struct ata_port *ap);
812 void (*host_stop)(struct ata_host *host);
813
814 #ifdef CONFIG_ATA_SFF
815 /*
816 * SFF / taskfile oriented ops
817 */
818 void (*sff_dev_select)(struct ata_port *ap, unsigned int device);
819 u8 (*sff_check_status)(struct ata_port *ap);
820 u8 (*sff_check_altstatus)(struct ata_port *ap);
821 void (*sff_tf_load)(struct ata_port *ap, const struct ata_taskfile *tf);
822 void (*sff_tf_read)(struct ata_port *ap, struct ata_taskfile *tf);
823 void (*sff_exec_command)(struct ata_port *ap,
824 const struct ata_taskfile *tf);
825 unsigned int (*sff_data_xfer)(struct ata_device *dev,
826 unsigned char *buf, unsigned int buflen, int rw);
827 u8 (*sff_irq_on)(struct ata_port *);
828 void (*sff_irq_clear)(struct ata_port *);
829
830 void (*bmdma_setup)(struct ata_queued_cmd *qc);
831 void (*bmdma_start)(struct ata_queued_cmd *qc);
832 void (*bmdma_stop)(struct ata_queued_cmd *qc);
833 u8 (*bmdma_status)(struct ata_port *ap);
834 #endif /* CONFIG_ATA_SFF */
835
836 ssize_t (*em_show)(struct ata_port *ap, char *buf);
837 ssize_t (*em_store)(struct ata_port *ap, const char *message,
838 size_t size);
839 ssize_t (*sw_activity_show)(struct ata_device *dev, char *buf);
840 ssize_t (*sw_activity_store)(struct ata_device *dev,
841 enum sw_activity val);
842 /*
843 * Obsolete
844 */
845 void (*phy_reset)(struct ata_port *ap);
846 void (*eng_timeout)(struct ata_port *ap);
847
848 /*
849 * ->inherits must be the last field and all the preceding
850 * fields must be pointers.
851 */
852 const struct ata_port_operations *inherits;
853 };
854
855 struct ata_port_info {
856 unsigned long flags;
857 unsigned long link_flags;
858 unsigned long pio_mask;
859 unsigned long mwdma_mask;
860 unsigned long udma_mask;
861 struct ata_port_operations *port_ops;
862 void *private_data;
863 };
864
865 struct ata_timing {
866 unsigned short mode; /* ATA mode */
867 unsigned short setup; /* t1 */
868 unsigned short act8b; /* t2 for 8-bit I/O */
869 unsigned short rec8b; /* t2i for 8-bit I/O */
870 unsigned short cyc8b; /* t0 for 8-bit I/O */
871 unsigned short active; /* t2 or tD */
872 unsigned short recover; /* t2i or tK */
873 unsigned short dmack_hold; /* tj */
874 unsigned short cycle; /* t0 */
875 unsigned short udma; /* t2CYCTYP/2 */
876 };
877
878 /*
879 * Core layer - drivers/ata/libata-core.c
880 */
881 extern const unsigned long sata_deb_timing_normal[];
882 extern const unsigned long sata_deb_timing_hotplug[];
883 extern const unsigned long sata_deb_timing_long[];
884
885 extern struct ata_port_operations ata_dummy_port_ops;
886 extern const struct ata_port_info ata_dummy_port_info;
887
888 static inline const unsigned long *
889 sata_ehc_deb_timing(struct ata_eh_context *ehc)
890 {
891 if (ehc->i.flags & ATA_EHI_HOTPLUGGED)
892 return sata_deb_timing_hotplug;
893 else
894 return sata_deb_timing_normal;
895 }
896
897 static inline int ata_port_is_dummy(struct ata_port *ap)
898 {
899 return ap->ops == &ata_dummy_port_ops;
900 }
901
902 extern void ata_port_probe(struct ata_port *);
903 extern int sata_set_spd(struct ata_link *link);
904 extern int ata_std_prereset(struct ata_link *link, unsigned long deadline);
905 extern int ata_wait_after_reset(struct ata_link *link, unsigned long deadline,
906 int (*check_ready)(struct ata_link *link));
907 extern int sata_link_debounce(struct ata_link *link,
908 const unsigned long *params, unsigned long deadline);
909 extern int sata_link_resume(struct ata_link *link, const unsigned long *params,
910 unsigned long deadline);
911 extern int sata_link_hardreset(struct ata_link *link,
912 const unsigned long *timing, unsigned long deadline,
913 bool *online, int (*check_ready)(struct ata_link *));
914 extern int sata_std_hardreset(struct ata_link *link, unsigned int *class,
915 unsigned long deadline);
916 extern void ata_std_postreset(struct ata_link *link, unsigned int *classes);
917 extern void ata_port_disable(struct ata_port *);
918
919 extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports);
920 extern struct ata_host *ata_host_alloc_pinfo(struct device *dev,
921 const struct ata_port_info * const * ppi, int n_ports);
922 extern int ata_slave_link_init(struct ata_port *ap);
923 extern int ata_host_start(struct ata_host *host);
924 extern int ata_host_register(struct ata_host *host,
925 struct scsi_host_template *sht);
926 extern int ata_host_activate(struct ata_host *host, int irq,
927 irq_handler_t irq_handler, unsigned long irq_flags,
928 struct scsi_host_template *sht);
929 extern void ata_host_detach(struct ata_host *host);
930 extern void ata_host_init(struct ata_host *, struct device *,
931 unsigned long, struct ata_port_operations *);
932 extern int ata_scsi_detect(struct scsi_host_template *sht);
933 extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
934 extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *));
935 extern int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *dev,
936 int cmd, void __user *arg);
937 extern void ata_sas_port_destroy(struct ata_port *);
938 extern struct ata_port *ata_sas_port_alloc(struct ata_host *,
939 struct ata_port_info *, struct Scsi_Host *);
940 extern int ata_sas_port_init(struct ata_port *);
941 extern int ata_sas_port_start(struct ata_port *ap);
942 extern void ata_sas_port_stop(struct ata_port *ap);
943 extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *);
944 extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
945 struct ata_port *ap);
946 extern int sata_scr_valid(struct ata_link *link);
947 extern int sata_scr_read(struct ata_link *link, int reg, u32 *val);
948 extern int sata_scr_write(struct ata_link *link, int reg, u32 val);
949 extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val);
950 extern bool ata_link_online(struct ata_link *link);
951 extern bool ata_link_offline(struct ata_link *link);
952 #ifdef CONFIG_PM
953 extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg);
954 extern void ata_host_resume(struct ata_host *host);
955 #endif
956 extern int ata_ratelimit(void);
957 extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
958 unsigned long interval, unsigned long timeout);
959 extern int atapi_cmd_type(u8 opcode);
960 extern void ata_tf_to_fis(const struct ata_taskfile *tf,
961 u8 pmp, int is_cmd, u8 *fis);
962 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
963 extern unsigned long ata_pack_xfermask(unsigned long pio_mask,
964 unsigned long mwdma_mask, unsigned long udma_mask);
965 extern void ata_unpack_xfermask(unsigned long xfer_mask,
966 unsigned long *pio_mask, unsigned long *mwdma_mask,
967 unsigned long *udma_mask);
968 extern u8 ata_xfer_mask2mode(unsigned long xfer_mask);
969 extern unsigned long ata_xfer_mode2mask(u8 xfer_mode);
970 extern int ata_xfer_mode2shift(unsigned long xfer_mode);
971 extern const char *ata_mode_string(unsigned long xfer_mask);
972 extern unsigned long ata_id_xfermask(const u16 *id);
973 extern int ata_port_start(struct ata_port *ap);
974 extern int ata_std_qc_defer(struct ata_queued_cmd *qc);
975 extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
976 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
977 unsigned int n_elem);
978 extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
979 extern void ata_dev_disable(struct ata_device *adev);
980 extern void ata_id_string(const u16 *id, unsigned char *s,
981 unsigned int ofs, unsigned int len);
982 extern void ata_id_c_string(const u16 *id, unsigned char *s,
983 unsigned int ofs, unsigned int len);
984 extern unsigned int ata_do_dev_read_id(struct ata_device *dev,
985 struct ata_taskfile *tf, u16 *id);
986 extern void ata_qc_complete(struct ata_queued_cmd *qc);
987 extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active);
988 extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
989 void (*done)(struct scsi_cmnd *));
990 extern int ata_std_bios_param(struct scsi_device *sdev,
991 struct block_device *bdev,
992 sector_t capacity, int geom[]);
993 extern int ata_scsi_slave_config(struct scsi_device *sdev);
994 extern void ata_scsi_slave_destroy(struct scsi_device *sdev);
995 extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
996 int queue_depth);
997 extern struct ata_device *ata_dev_pair(struct ata_device *adev);
998 extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev);
999
1000 extern int ata_cable_40wire(struct ata_port *ap);
1001 extern int ata_cable_80wire(struct ata_port *ap);
1002 extern int ata_cable_sata(struct ata_port *ap);
1003 extern int ata_cable_ignore(struct ata_port *ap);
1004 extern int ata_cable_unknown(struct ata_port *ap);
1005
1006 /* Timing helpers */
1007 extern unsigned int ata_pio_need_iordy(const struct ata_device *);
1008 extern const struct ata_timing *ata_timing_find_mode(u8 xfer_mode);
1009 extern int ata_timing_compute(struct ata_device *, unsigned short,
1010 struct ata_timing *, int, int);
1011 extern void ata_timing_merge(const struct ata_timing *,
1012 const struct ata_timing *, struct ata_timing *,
1013 unsigned int);
1014 extern u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle);
1015
1016 /* PCI */
1017 #ifdef CONFIG_PCI
1018 struct pci_dev;
1019
1020 struct pci_bits {
1021 unsigned int reg; /* PCI config register to read */
1022 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
1023 unsigned long mask;
1024 unsigned long val;
1025 };
1026
1027 extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
1028 extern void ata_pci_remove_one(struct pci_dev *pdev);
1029
1030 #ifdef CONFIG_PM
1031 extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg);
1032 extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev);
1033 extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
1034 extern int ata_pci_device_resume(struct pci_dev *pdev);
1035 #endif /* CONFIG_PM */
1036 #endif /* CONFIG_PCI */
1037
1038 /*
1039 * ACPI - drivers/ata/libata-acpi.c
1040 */
1041 #ifdef CONFIG_ATA_ACPI
1042 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
1043 {
1044 if (ap->pflags & ATA_PFLAG_INIT_GTM_VALID)
1045 return &ap->__acpi_init_gtm;
1046 return NULL;
1047 }
1048 int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm);
1049 int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *stm);
1050 unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev,
1051 const struct ata_acpi_gtm *gtm);
1052 int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm);
1053 #else
1054 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
1055 {
1056 return NULL;
1057 }
1058
1059 static inline int ata_acpi_stm(const struct ata_port *ap,
1060 struct ata_acpi_gtm *stm)
1061 {
1062 return -ENOSYS;
1063 }
1064
1065 static inline int ata_acpi_gtm(const struct ata_port *ap,
1066 struct ata_acpi_gtm *stm)
1067 {
1068 return -ENOSYS;
1069 }
1070
1071 static inline unsigned int ata_acpi_gtm_xfermask(struct ata_device *dev,
1072 const struct ata_acpi_gtm *gtm)
1073 {
1074 return 0;
1075 }
1076
1077 static inline int ata_acpi_cbl_80wire(struct ata_port *ap,
1078 const struct ata_acpi_gtm *gtm)
1079 {
1080 return 0;
1081 }
1082 #endif
1083
1084 /*
1085 * EH - drivers/ata/libata-eh.c
1086 */
1087 extern void ata_port_schedule_eh(struct ata_port *ap);
1088 extern int ata_link_abort(struct ata_link *link);
1089 extern int ata_port_abort(struct ata_port *ap);
1090 extern int ata_port_freeze(struct ata_port *ap);
1091 extern int sata_async_notification(struct ata_port *ap);
1092
1093 extern void ata_eh_freeze_port(struct ata_port *ap);
1094 extern void ata_eh_thaw_port(struct ata_port *ap);
1095
1096 extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
1097 extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
1098 extern void ata_eh_analyze_ncq_error(struct ata_link *link);
1099
1100 extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
1101 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
1102 ata_postreset_fn_t postreset);
1103 extern void ata_std_error_handler(struct ata_port *ap);
1104
1105 /*
1106 * Base operations to inherit from and initializers for sht
1107 *
1108 * Operations
1109 *
1110 * base : Common to all libata drivers.
1111 * sata : SATA controllers w/ native interface.
1112 * pmp : SATA controllers w/ PMP support.
1113 * sff : SFF ATA controllers w/o BMDMA support.
1114 * bmdma : SFF ATA controllers w/ BMDMA support.
1115 *
1116 * sht initializers
1117 *
1118 * BASE : Common to all libata drivers. The user must set
1119 * sg_tablesize and dma_boundary.
1120 * PIO : SFF ATA controllers w/ only PIO support.
1121 * BMDMA : SFF ATA controllers w/ BMDMA support. sg_tablesize and
1122 * dma_boundary are set to BMDMA limits.
1123 * NCQ : SATA controllers supporting NCQ. The user must set
1124 * sg_tablesize, dma_boundary and can_queue.
1125 */
1126 extern const struct ata_port_operations ata_base_port_ops;
1127 extern const struct ata_port_operations sata_port_ops;
1128 extern struct device_attribute *ata_common_sdev_attrs[];
1129
1130 #define ATA_BASE_SHT(drv_name) \
1131 .module = THIS_MODULE, \
1132 .name = drv_name, \
1133 .ioctl = ata_scsi_ioctl, \
1134 .queuecommand = ata_scsi_queuecmd, \
1135 .can_queue = ATA_DEF_QUEUE, \
1136 .this_id = ATA_SHT_THIS_ID, \
1137 .cmd_per_lun = ATA_SHT_CMD_PER_LUN, \
1138 .emulated = ATA_SHT_EMULATED, \
1139 .use_clustering = ATA_SHT_USE_CLUSTERING, \
1140 .proc_name = drv_name, \
1141 .slave_configure = ata_scsi_slave_config, \
1142 .slave_destroy = ata_scsi_slave_destroy, \
1143 .bios_param = ata_std_bios_param, \
1144 .sdev_attrs = ata_common_sdev_attrs
1145
1146 #define ATA_NCQ_SHT(drv_name) \
1147 ATA_BASE_SHT(drv_name), \
1148 .change_queue_depth = ata_scsi_change_queue_depth
1149
1150 /*
1151 * PMP helpers
1152 */
1153 #ifdef CONFIG_SATA_PMP
1154 static inline bool sata_pmp_supported(struct ata_port *ap)
1155 {
1156 return ap->flags & ATA_FLAG_PMP;
1157 }
1158
1159 static inline bool sata_pmp_attached(struct ata_port *ap)
1160 {
1161 return ap->nr_pmp_links != 0;
1162 }
1163
1164 static inline int ata_is_host_link(const struct ata_link *link)
1165 {
1166 return link == &link->ap->link || link == link->ap->slave_link;
1167 }
1168 #else /* CONFIG_SATA_PMP */
1169 static inline bool sata_pmp_supported(struct ata_port *ap)
1170 {
1171 return false;
1172 }
1173
1174 static inline bool sata_pmp_attached(struct ata_port *ap)
1175 {
1176 return false;
1177 }
1178
1179 static inline int ata_is_host_link(const struct ata_link *link)
1180 {
1181 return 1;
1182 }
1183 #endif /* CONFIG_SATA_PMP */
1184
1185 static inline int sata_srst_pmp(struct ata_link *link)
1186 {
1187 if (sata_pmp_supported(link->ap) && ata_is_host_link(link))
1188 return SATA_PMP_CTRL_PORT;
1189 return link->pmp;
1190 }
1191
1192 /*
1193 * printk helpers
1194 */
1195 #define ata_port_printk(ap, lv, fmt, args...) \
1196 printk("%sata%u: "fmt, lv, (ap)->print_id , ##args)
1197
1198 #define ata_link_printk(link, lv, fmt, args...) do { \
1199 if (sata_pmp_attached((link)->ap) || (link)->ap->slave_link) \
1200 printk("%sata%u.%02u: "fmt, lv, (link)->ap->print_id, \
1201 (link)->pmp , ##args); \
1202 else \
1203 printk("%sata%u: "fmt, lv, (link)->ap->print_id , ##args); \
1204 } while(0)
1205
1206 #define ata_dev_printk(dev, lv, fmt, args...) \
1207 printk("%sata%u.%02u: "fmt, lv, (dev)->link->ap->print_id, \
1208 (dev)->link->pmp + (dev)->devno , ##args)
1209
1210 /*
1211 * ata_eh_info helpers
1212 */
1213 extern void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...)
1214 __attribute__ ((format (printf, 2, 3)));
1215 extern void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...)
1216 __attribute__ ((format (printf, 2, 3)));
1217 extern void ata_ehi_clear_desc(struct ata_eh_info *ehi);
1218
1219 static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
1220 {
1221 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
1222 ehi->flags |= ATA_EHI_HOTPLUGGED;
1223 ehi->action |= ATA_EH_RESET | ATA_EH_ENABLE_LINK;
1224 ehi->err_mask |= AC_ERR_ATA_BUS;
1225 }
1226
1227 /*
1228 * port description helpers
1229 */
1230 extern void ata_port_desc(struct ata_port *ap, const char *fmt, ...)
1231 __attribute__ ((format (printf, 2, 3)));
1232 #ifdef CONFIG_PCI
1233 extern void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset,
1234 const char *name);
1235 #endif
1236
1237 static inline unsigned int ata_tag_valid(unsigned int tag)
1238 {
1239 return (tag < ATA_MAX_QUEUE) ? 1 : 0;
1240 }
1241
1242 static inline unsigned int ata_tag_internal(unsigned int tag)
1243 {
1244 return tag == ATA_TAG_INTERNAL;
1245 }
1246
1247 /*
1248 * device helpers
1249 */
1250 static inline unsigned int ata_class_enabled(unsigned int class)
1251 {
1252 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI ||
1253 class == ATA_DEV_PMP || class == ATA_DEV_SEMB;
1254 }
1255
1256 static inline unsigned int ata_class_disabled(unsigned int class)
1257 {
1258 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP ||
1259 class == ATA_DEV_PMP_UNSUP || class == ATA_DEV_SEMB_UNSUP;
1260 }
1261
1262 static inline unsigned int ata_class_absent(unsigned int class)
1263 {
1264 return !ata_class_enabled(class) && !ata_class_disabled(class);
1265 }
1266
1267 static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
1268 {
1269 return ata_class_enabled(dev->class);
1270 }
1271
1272 static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
1273 {
1274 return ata_class_disabled(dev->class);
1275 }
1276
1277 static inline unsigned int ata_dev_absent(const struct ata_device *dev)
1278 {
1279 return ata_class_absent(dev->class);
1280 }
1281
1282 /*
1283 * link helpers
1284 */
1285 static inline int ata_link_max_devices(const struct ata_link *link)
1286 {
1287 if (ata_is_host_link(link) && link->ap->flags & ATA_FLAG_SLAVE_POSS)
1288 return 2;
1289 return 1;
1290 }
1291
1292 static inline int ata_link_active(struct ata_link *link)
1293 {
1294 return ata_tag_valid(link->active_tag) || link->sactive;
1295 }
1296
1297 /*
1298 * Iterators
1299 *
1300 * ATA_LITER_* constants are used to select link iteration mode and
1301 * ATA_DITER_* device iteration mode.
1302 *
1303 * For a custom iteration directly using ata_{link|dev}_next(), if
1304 * @link or @dev, respectively, is NULL, the first element is
1305 * returned. @dev and @link can be any valid device or link and the
1306 * next element according to the iteration mode will be returned.
1307 * After the last element, NULL is returned.
1308 */
1309 enum ata_link_iter_mode {
1310 ATA_LITER_EDGE, /* if present, PMP links only; otherwise,
1311 * host link. no slave link */
1312 ATA_LITER_HOST_FIRST, /* host link followed by PMP or slave links */
1313 ATA_LITER_PMP_FIRST, /* PMP links followed by host link,
1314 * slave link still comes after host link */
1315 };
1316
1317 enum ata_dev_iter_mode {
1318 ATA_DITER_ENABLED,
1319 ATA_DITER_ENABLED_REVERSE,
1320 ATA_DITER_ALL,
1321 ATA_DITER_ALL_REVERSE,
1322 };
1323
1324 extern struct ata_link *ata_link_next(struct ata_link *link,
1325 struct ata_port *ap,
1326 enum ata_link_iter_mode mode);
1327
1328 extern struct ata_device *ata_dev_next(struct ata_device *dev,
1329 struct ata_link *link,
1330 enum ata_dev_iter_mode mode);
1331
1332 /*
1333 * Shortcut notation for iterations
1334 *
1335 * ata_for_each_link() iterates over each link of @ap according to
1336 * @mode. @link points to the current link in the loop. @link is
1337 * NULL after loop termination. ata_for_each_dev() works the same way
1338 * except that it iterates over each device of @link.
1339 *
1340 * Note that the mode prefixes ATA_{L|D}ITER_ shouldn't need to be
1341 * specified when using the following shorthand notations. Only the
1342 * mode itself (EDGE, HOST_FIRST, ENABLED, etc...) should be
1343 * specified. This not only increases brevity but also makes it
1344 * impossible to use ATA_LITER_* for device iteration or vice-versa.
1345 */
1346 #define ata_for_each_link(link, ap, mode) \
1347 for ((link) = ata_link_next(NULL, (ap), ATA_LITER_##mode); (link); \
1348 (link) = ata_link_next((link), (ap), ATA_LITER_##mode))
1349
1350 #define ata_for_each_dev(dev, link, mode) \
1351 for ((dev) = ata_dev_next(NULL, (link), ATA_DITER_##mode); (dev); \
1352 (dev) = ata_dev_next((dev), (link), ATA_DITER_##mode))
1353
1354 /**
1355 * ata_ncq_enabled - Test whether NCQ is enabled
1356 * @dev: ATA device to test for
1357 *
1358 * LOCKING:
1359 * spin_lock_irqsave(host lock)
1360 *
1361 * RETURNS:
1362 * 1 if NCQ is enabled for @dev, 0 otherwise.
1363 */
1364 static inline int ata_ncq_enabled(struct ata_device *dev)
1365 {
1366 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF |
1367 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ;
1368 }
1369
1370 static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
1371 {
1372 qc->tf.ctl |= ATA_NIEN;
1373 }
1374
1375 static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap,
1376 unsigned int tag)
1377 {
1378 if (likely(ata_tag_valid(tag)))
1379 return &ap->qcmd[tag];
1380 return NULL;
1381 }
1382
1383 static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap,
1384 unsigned int tag)
1385 {
1386 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
1387
1388 if (unlikely(!qc) || !ap->ops->error_handler)
1389 return qc;
1390
1391 if ((qc->flags & (ATA_QCFLAG_ACTIVE |
1392 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE)
1393 return qc;
1394
1395 return NULL;
1396 }
1397
1398 static inline unsigned int ata_qc_raw_nbytes(struct ata_queued_cmd *qc)
1399 {
1400 return qc->nbytes - min(qc->extrabytes, qc->nbytes);
1401 }
1402
1403 static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
1404 {
1405 memset(tf, 0, sizeof(*tf));
1406
1407 tf->ctl = dev->link->ap->ctl;
1408 if (dev->devno == 0)
1409 tf->device = ATA_DEVICE_OBS;
1410 else
1411 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
1412 }
1413
1414 static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
1415 {
1416 qc->dma_dir = DMA_NONE;
1417 qc->sg = NULL;
1418 qc->flags = 0;
1419 qc->cursg = NULL;
1420 qc->cursg_ofs = 0;
1421 qc->nbytes = qc->extrabytes = qc->curbytes = 0;
1422 qc->n_elem = 0;
1423 qc->err_mask = 0;
1424 qc->sect_size = ATA_SECT_SIZE;
1425
1426 ata_tf_init(qc->dev, &qc->tf);
1427
1428 /* init result_tf such that it indicates normal completion */
1429 qc->result_tf.command = ATA_DRDY;
1430 qc->result_tf.feature = 0;
1431 }
1432
1433 static inline int ata_try_flush_cache(const struct ata_device *dev)
1434 {
1435 return ata_id_wcache_enabled(dev->id) ||
1436 ata_id_has_flush(dev->id) ||
1437 ata_id_has_flush_ext(dev->id);
1438 }
1439
1440 static inline unsigned int ac_err_mask(u8 status)
1441 {
1442 if (status & (ATA_BUSY | ATA_DRQ))
1443 return AC_ERR_HSM;
1444 if (status & (ATA_ERR | ATA_DF))
1445 return AC_ERR_DEV;
1446 return 0;
1447 }
1448
1449 static inline unsigned int __ac_err_mask(u8 status)
1450 {
1451 unsigned int mask = ac_err_mask(status);
1452 if (mask == 0)
1453 return AC_ERR_OTHER;
1454 return mask;
1455 }
1456
1457 static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
1458 {
1459 return *(struct ata_port **)&host->hostdata[0];
1460 }
1461
1462 static inline int ata_check_ready(u8 status)
1463 {
1464 if (!(status & ATA_BUSY))
1465 return 1;
1466
1467 /* 0xff indicates either no device or device not ready */
1468 if (status == 0xff)
1469 return -ENODEV;
1470
1471 return 0;
1472 }
1473
1474 static inline unsigned long ata_deadline(unsigned long from_jiffies,
1475 unsigned long timeout_msecs)
1476 {
1477 return from_jiffies + msecs_to_jiffies(timeout_msecs);
1478 }
1479
1480 /* Don't open code these in drivers as there are traps. Firstly the range may
1481 change in future hardware and specs, secondly 0xFF means 'no DMA' but is
1482 > UDMA_0. Dyma ddreigiau */
1483
1484 static inline int ata_using_mwdma(struct ata_device *adev)
1485 {
1486 if (adev->dma_mode >= XFER_MW_DMA_0 && adev->dma_mode <= XFER_MW_DMA_4)
1487 return 1;
1488 return 0;
1489 }
1490
1491 static inline int ata_using_udma(struct ata_device *adev)
1492 {
1493 if (adev->dma_mode >= XFER_UDMA_0 && adev->dma_mode <= XFER_UDMA_7)
1494 return 1;
1495 return 0;
1496 }
1497
1498 static inline int ata_dma_enabled(struct ata_device *adev)
1499 {
1500 return (adev->dma_mode == 0xFF ? 0 : 1);
1501 }
1502
1503 /**************************************************************************
1504 * PMP - drivers/ata/libata-pmp.c
1505 */
1506 #ifdef CONFIG_SATA_PMP
1507
1508 extern const struct ata_port_operations sata_pmp_port_ops;
1509
1510 extern int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc);
1511 extern void sata_pmp_error_handler(struct ata_port *ap);
1512
1513 #else /* CONFIG_SATA_PMP */
1514
1515 #define sata_pmp_port_ops sata_port_ops
1516 #define sata_pmp_qc_defer_cmd_switch ata_std_qc_defer
1517 #define sata_pmp_error_handler ata_std_error_handler
1518
1519 #endif /* CONFIG_SATA_PMP */
1520
1521
1522 /**************************************************************************
1523 * SFF - drivers/ata/libata-sff.c
1524 */
1525 #ifdef CONFIG_ATA_SFF
1526
1527 extern const struct ata_port_operations ata_sff_port_ops;
1528 extern const struct ata_port_operations ata_bmdma_port_ops;
1529 extern const struct ata_port_operations ata_bmdma32_port_ops;
1530
1531 /* PIO only, sg_tablesize and dma_boundary limits can be removed */
1532 #define ATA_PIO_SHT(drv_name) \
1533 ATA_BASE_SHT(drv_name), \
1534 .sg_tablesize = LIBATA_MAX_PRD, \
1535 .dma_boundary = ATA_DMA_BOUNDARY
1536
1537 #define ATA_BMDMA_SHT(drv_name) \
1538 ATA_BASE_SHT(drv_name), \
1539 .sg_tablesize = LIBATA_MAX_PRD, \
1540 .dma_boundary = ATA_DMA_BOUNDARY
1541
1542 extern void ata_sff_qc_prep(struct ata_queued_cmd *qc);
1543 extern void ata_sff_dumb_qc_prep(struct ata_queued_cmd *qc);
1544 extern void ata_sff_dev_select(struct ata_port *ap, unsigned int device);
1545 extern u8 ata_sff_check_status(struct ata_port *ap);
1546 extern void ata_sff_pause(struct ata_port *ap);
1547 extern void ata_sff_dma_pause(struct ata_port *ap);
1548 extern int ata_sff_busy_sleep(struct ata_port *ap,
1549 unsigned long timeout_pat, unsigned long timeout);
1550 extern int ata_sff_wait_ready(struct ata_link *link, unsigned long deadline);
1551 extern void ata_sff_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
1552 extern void ata_sff_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
1553 extern void ata_sff_exec_command(struct ata_port *ap,
1554 const struct ata_taskfile *tf);
1555 extern unsigned int ata_sff_data_xfer(struct ata_device *dev,
1556 unsigned char *buf, unsigned int buflen, int rw);
1557 extern unsigned int ata_sff_data_xfer32(struct ata_device *dev,
1558 unsigned char *buf, unsigned int buflen, int rw);
1559 extern unsigned int ata_sff_data_xfer_noirq(struct ata_device *dev,
1560 unsigned char *buf, unsigned int buflen, int rw);
1561 extern u8 ata_sff_irq_on(struct ata_port *ap);
1562 extern void ata_sff_irq_clear(struct ata_port *ap);
1563 extern int ata_sff_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
1564 u8 status, int in_wq);
1565 extern unsigned int ata_sff_qc_issue(struct ata_queued_cmd *qc);
1566 extern bool ata_sff_qc_fill_rtf(struct ata_queued_cmd *qc);
1567 extern unsigned int ata_sff_host_intr(struct ata_port *ap,
1568 struct ata_queued_cmd *qc);
1569 extern irqreturn_t ata_sff_interrupt(int irq, void *dev_instance);
1570 extern void ata_sff_freeze(struct ata_port *ap);
1571 extern void ata_sff_thaw(struct ata_port *ap);
1572 extern int ata_sff_prereset(struct ata_link *link, unsigned long deadline);
1573 extern unsigned int ata_sff_dev_classify(struct ata_device *dev, int present,
1574 u8 *r_err);
1575 extern int ata_sff_wait_after_reset(struct ata_link *link, unsigned int devmask,
1576 unsigned long deadline);
1577 extern int ata_sff_softreset(struct ata_link *link, unsigned int *classes,
1578 unsigned long deadline);
1579 extern int sata_sff_hardreset(struct ata_link *link, unsigned int *class,
1580 unsigned long deadline);
1581 extern void ata_sff_postreset(struct ata_link *link, unsigned int *classes);
1582 extern void ata_sff_error_handler(struct ata_port *ap);
1583 extern void ata_sff_post_internal_cmd(struct ata_queued_cmd *qc);
1584 extern int ata_sff_port_start(struct ata_port *ap);
1585 extern void ata_sff_std_ports(struct ata_ioports *ioaddr);
1586 extern unsigned long ata_bmdma_mode_filter(struct ata_device *dev,
1587 unsigned long xfer_mask);
1588 extern void ata_bmdma_setup(struct ata_queued_cmd *qc);
1589 extern void ata_bmdma_start(struct ata_queued_cmd *qc);
1590 extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
1591 extern u8 ata_bmdma_status(struct ata_port *ap);
1592 extern void ata_bus_reset(struct ata_port *ap);
1593
1594 #ifdef CONFIG_PCI
1595 extern int ata_pci_bmdma_clear_simplex(struct pci_dev *pdev);
1596 extern int ata_pci_bmdma_init(struct ata_host *host);
1597 extern int ata_pci_sff_init_host(struct ata_host *host);
1598 extern int ata_pci_sff_prepare_host(struct pci_dev *pdev,
1599 const struct ata_port_info * const * ppi,
1600 struct ata_host **r_host);
1601 extern int ata_pci_sff_activate_host(struct ata_host *host,
1602 irq_handler_t irq_handler,
1603 struct scsi_host_template *sht);
1604 extern int ata_pci_sff_init_one(struct pci_dev *pdev,
1605 const struct ata_port_info * const * ppi,
1606 struct scsi_host_template *sht, void *host_priv);
1607 #endif /* CONFIG_PCI */
1608
1609 /**
1610 * ata_sff_busy_wait - Wait for a port status register
1611 * @ap: Port to wait for.
1612 * @bits: bits that must be clear
1613 * @max: number of 10uS waits to perform
1614 *
1615 * Waits up to max*10 microseconds for the selected bits in the port's
1616 * status register to be cleared.
1617 * Returns final value of status register.
1618 *
1619 * LOCKING:
1620 * Inherited from caller.
1621 */
1622 static inline u8 ata_sff_busy_wait(struct ata_port *ap, unsigned int bits,
1623 unsigned int max)
1624 {
1625 u8 status;
1626
1627 do {
1628 udelay(10);
1629 status = ap->ops->sff_check_status(ap);
1630 max--;
1631 } while (status != 0xff && (status & bits) && (max > 0));
1632
1633 return status;
1634 }
1635
1636 /**
1637 * ata_wait_idle - Wait for a port to be idle.
1638 * @ap: Port to wait for.
1639 *
1640 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
1641 * Returns final value of status register.
1642 *
1643 * LOCKING:
1644 * Inherited from caller.
1645 */
1646 static inline u8 ata_wait_idle(struct ata_port *ap)
1647 {
1648 u8 status = ata_sff_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
1649
1650 #ifdef ATA_DEBUG
1651 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ)))
1652 ata_port_printk(ap, KERN_DEBUG, "abnormal Status 0x%X\n",
1653 status);
1654 #endif
1655
1656 return status;
1657 }
1658 #endif /* CONFIG_ATA_SFF */
1659
1660 #endif /* __LINUX_LIBATA_H__ */
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