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libata: move generic hardreset code from sata_sff_hardreset() to sata_link_hardreset()
[mirror_ubuntu-artful-kernel.git] / include / linux / libata.h
CommitLineData
1da177e4 1/*
af36d7f0
JG		 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 *
1da177e4
LT		 24 */
25
26#ifndef __LINUX_LIBATA_H__
27#define __LINUX_LIBATA_H__
28
29#include <linux/delay.h>
30#include <linux/interrupt.h>
1c72d8d9 31#include <linux/dma-mapping.h>
87260216 32#include <linux/scatterlist.h>
f0d36efd 33#include <linux/io.h>
1da177e4
LT		 34#include <linux/ata.h>
35#include <linux/workqueue.h>
35bb94b1 36#include <scsi/scsi_host.h>
11ef697b 37#include <linux/acpi.h>
ceb0c642 38#include <linux/cdrom.h>
1da177e4 39
a6d967a4
JG		 40/*
41 * Define if arch has non-standard setup. This is a _PCI_ standard
42 * not a legacy or ISA standard.
43 */
44#ifdef CONFIG_ATA_NONSTANDARD
2ec7df04 45#include <asm/libata-portmap.h>
a6d967a4
JG		 46#else
47#include <asm-generic/libata-portmap.h>
48#endif
2ec7df04 49
1da177e4 50/*
bfd60579
RD		 51 * compile-time options: to be removed as soon as all the drivers are
52 * converted to the new debugging mechanism
1da177e4
LT		 53 */
54#undef ATA_DEBUG /* debugging output */
55#undef ATA_VERBOSE_DEBUG /* yet more debugging output */
56#undef ATA_IRQ_TRAP /* define to ack screaming irqs */
57#undef ATA_NDEBUG /* define to disable quick runtime checks */
1da177e4
LT		 58
59
60/* note: prints function name for you */
61#ifdef ATA_DEBUG
62#define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
63#ifdef ATA_VERBOSE_DEBUG
64#define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
65#else
66#define VPRINTK(fmt, args...)
67#endif /* ATA_VERBOSE_DEBUG */
68#else
69#define DPRINTK(fmt, args...)
70#define VPRINTK(fmt, args...)
71#endif /* ATA_DEBUG */
72
2c13b7ce
JG		 73#define BPRINTK(fmt, args...) if (ap->flags & ATA_FLAG_DEBUGMSG) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
74
bfd60579
RD		 75/* NEW: debug levels */
76#define HAVE_LIBATA_MSG 1
77
78enum {
79 ATA_MSG_DRV = 0x0001,
80 ATA_MSG_INFO = 0x0002,
81 ATA_MSG_PROBE = 0x0004,
82 ATA_MSG_WARN = 0x0008,
83 ATA_MSG_MALLOC = 0x0010,
84 ATA_MSG_CTL = 0x0020,
85 ATA_MSG_INTR = 0x0040,
86 ATA_MSG_ERR = 0x0080,
87};
88
89#define ata_msg_drv(p) ((p)->msg_enable & ATA_MSG_DRV)
90#define ata_msg_info(p) ((p)->msg_enable & ATA_MSG_INFO)
91#define ata_msg_probe(p) ((p)->msg_enable & ATA_MSG_PROBE)
92#define ata_msg_warn(p) ((p)->msg_enable & ATA_MSG_WARN)
93#define ata_msg_malloc(p) ((p)->msg_enable & ATA_MSG_MALLOC)
94#define ata_msg_ctl(p) ((p)->msg_enable & ATA_MSG_CTL)
95#define ata_msg_intr(p) ((p)->msg_enable & ATA_MSG_INTR)
96#define ata_msg_err(p) ((p)->msg_enable & ATA_MSG_ERR)
97
98static inline u32 ata_msg_init(int dval, int default_msg_enable_bits)
99{
100 if (dval < 0 || dval >= (sizeof(u32) * 8))
101 return default_msg_enable_bits; /* should be 0x1 - only driver info msgs */
102 if (!dval)
103 return 0;
104 return (1 << dval) - 1;
105}
106
1da177e4
LT		 107/* defines only for the constants which don't work well as enums */
108#define ATA_TAG_POISON 0xfafbfcfdU
109
1da177e4
LT		 110enum {
111 /* various global constants */
112 LIBATA_MAX_PRD = ATA_MAX_PRD / 2,
d26fc955 113 LIBATA_DUMB_MAX_PRD = ATA_MAX_PRD / 4, /* Worst case */
1da177e4
LT		 114 ATA_MAX_PORTS = 8,
115 ATA_DEF_QUEUE = 1,
2ab7db1f 116 /* tag ATA_MAX_QUEUE - 1 is reserved for internal commands */
a6e6ce8e 117 ATA_MAX_QUEUE = 32,
2ab7db1f 118 ATA_TAG_INTERNAL = ATA_MAX_QUEUE - 1,
1da177e4
LT		 119 ATA_MAX_BUS = 2,
120 ATA_DEF_BUSY_WAIT = 10000,
121 ATA_SHORT_PAUSE = (HZ >> 6) + 1,
122
140b5e59
TH		 123 ATAPI_MAX_DRAIN = 16 << 10,
124
b558eddd
TH		 125 ATA_ALL_DEVICES = (1 << ATA_MAX_DEVICES) - 1,
126
1da177e4
LT		 127 ATA_SHT_EMULATED = 1,
128 ATA_SHT_CMD_PER_LUN = 1,
129 ATA_SHT_THIS_ID = -1,
cf482935 130 ATA_SHT_USE_CLUSTERING = 1,
1da177e4
LT		 131
132 /* struct ata_device stuff */
949b38af
TH		 133 ATA_DFLAG_LBA = (1 << 0), /* device supports LBA */
134 ATA_DFLAG_LBA48 = (1 << 1), /* device supports LBA48 */
029f5468 135 ATA_DFLAG_CDB_INTR = (1 << 2), /* device asserts INTRQ when ready for CDB */
88e49034 136 ATA_DFLAG_NCQ = (1 << 3), /* device supports NCQ */
6fc49adb 137 ATA_DFLAG_FLUSH_EXT = (1 << 4), /* do FLUSH_EXT instead of FLUSH */
6746544c
TH		 138 ATA_DFLAG_ACPI_PENDING = (1 << 5), /* ACPI resume action pending */
139 ATA_DFLAG_ACPI_FAILED = (1 << 6), /* ACPI on devcfg has failed */
7d77b247 140 ATA_DFLAG_AN = (1 << 7), /* AN configured */
ca77329f
KCA		 141 ATA_DFLAG_HIPM = (1 << 8), /* device supports HIPM */
142 ATA_DFLAG_DIPM = (1 << 9), /* device supports DIPM */
91163006 143 ATA_DFLAG_DMADIR = (1 << 10), /* device requires DMADIR */
2557164e 144 ATA_DFLAG_CFG_MASK = (1 << 12) - 1,
949b38af 145
2557164e
KCA		 146 ATA_DFLAG_PIO = (1 << 12), /* device limited to PIO mode */
147 ATA_DFLAG_NCQ_OFF = (1 << 13), /* device limited to non-NCQ mode */
148 ATA_DFLAG_SPUNDOWN = (1 << 14), /* XXX: for spindown_compat */
054a5fba 149 ATA_DFLAG_SLEEPING = (1 << 15), /* device is sleeping */
00115e0f 150 ATA_DFLAG_DUBIOUS_XFER = (1 << 16), /* data transfer not verified */
f20ded38 151 ATA_DFLAG_INIT_MASK = (1 << 24) - 1,
1da177e4 152
f20ded38
TH		 153 ATA_DFLAG_DETACH = (1 << 24),
154 ATA_DFLAG_DETACHED = (1 << 25),
abdda733 155
1da177e4
LT		 156 ATA_DEV_UNKNOWN = 0, /* unknown device */
157 ATA_DEV_ATA = 1, /* ATA device */
158 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */
159 ATA_DEV_ATAPI = 3, /* ATAPI device */
160 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */
e0a71752
TH		 161 ATA_DEV_PMP = 5, /* SATA port multiplier */
162 ATA_DEV_PMP_UNSUP = 6, /* SATA port multiplier (unsupported) */
163 ATA_DEV_SEMB = 7, /* SEMB */
164 ATA_DEV_SEMB_UNSUP = 8, /* SEMB (unsupported) */
165 ATA_DEV_NONE = 9, /* no device */
1da177e4 166
0c88758b 167 /* struct ata_link flags */
ae791c05
TH		 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,
fd995f70 172 ATA_LFLAG_NO_RETRY = (1 << 5), /* don't retry this link */
f9df58cb 173 ATA_LFLAG_DISABLED = (1 << 6), /* link is disabled */
0c88758b 174
1da177e4 175 /* struct ata_port flags */
949b38af 176 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */
1da177e4 177 /* (doesn't imply presence) */
949b38af
TH		 178 ATA_FLAG_SATA = (1 << 1),
179 ATA_FLAG_NO_LEGACY = (1 << 2), /* no legacy mode check */
180 ATA_FLAG_MMIO = (1 << 3), /* use MMIO, not PIO */
181 ATA_FLAG_SRST = (1 << 4), /* (obsolete) use ATA SRST, not E.D.D. */
182 ATA_FLAG_SATA_RESET = (1 << 5), /* (obsolete) use COMRESET */
183 ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */
184 ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */
185 ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */
7395acb2
TH		 186 ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD
187 * doesn't handle PIO interrupts */
188 ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */
7395acb2 189 ATA_FLAG_DEBUGMSG = (1 << 13),
b2a8bbe6 190 ATA_FLAG_IGN_SIMPLEX = (1 << 15), /* ignore SIMPLEX */
f834e49f 191 ATA_FLAG_NO_IORDY = (1 << 16), /* controller lacks iordy */
3cadbcc0 192 ATA_FLAG_ACPI_SATA = (1 << 17), /* need native SATA ACPI layout */
9f45cbd3 193 ATA_FLAG_AN = (1 << 18), /* controller supports AN */
e0a71752 194 ATA_FLAG_PMP = (1 << 19), /* controller supports PMP */
ca77329f 195 ATA_FLAG_IPM = (1 << 20), /* driver can handle IPM */
949b38af 196
b51e9e5d
TH		 197 /* The following flag belongs to ap->pflags but is kept in
198 * ap->flags because it's referenced in many LLDs and will be
199 * removed in not-too-distant future.
200 */
201 ATA_FLAG_DISABLED = (1 << 23), /* port is disabled, ignore it */
202
203 /* bits 24:31 of ap->flags are reserved for LLD specific flags */
9ec957f2 204
b51e9e5d
TH		 205 /* struct ata_port pflags */
206 ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */
207 ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */
208 ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */
209 ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */
210 ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */
211 ATA_PFLAG_UNLOADING = (1 << 5), /* module is unloading */
212 ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */
f4d6d004 213 ATA_PFLAG_INITIALIZING = (1 << 7), /* being initialized, don't touch */
afaa5c37 214 ATA_PFLAG_RESETTING = (1 << 8), /* reset in progress */
949b38af 215
b51e9e5d 216 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */
500530f6 217 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */
c05e6ff0 218 ATA_PFLAG_INIT_GTM_VALID = (1 << 19), /* initial gtm data valid */
949b38af
TH		 219
220 /* struct ata_queued_cmd flags */
221 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */
001102d7 222 ATA_QCFLAG_DMAMAP = (1 << 1), /* SG table is DMA mapped */
27197367 223 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */
e61e0672 224 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */
da917d69 225 ATA_QCFLAG_CLEAR_EXCL = (1 << 5), /* clear excl_link on completion */
e027bd36 226 ATA_QCFLAG_QUIET = (1 << 6), /* don't report device error */
03faab78 227 ATA_QCFLAG_RETRY = (1 << 7), /* retry after failure */
e61e0672 228
9ec957f2
TH		 229 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */
230 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */
231 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */
1da177e4 232
4e5ec5db 233 /* host set flags */
cca3974e 234 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */
ecef7253 235 ATA_HOST_STARTED = (1 << 1), /* Host started */
9bec2e38 236
b8b275ef
TH		 237 /* bits 24:31 of host->flags are reserved for LLD specific flags */
238
1da177e4 239 /* various lengths of time */
8d238e01
AC		 240 ATA_TMOUT_BOOT = 30 * HZ, /* heuristic */
241 ATA_TMOUT_BOOT_QUICK = 7 * HZ, /* heuristic */
a2a7a662
TH		 242 ATA_TMOUT_INTERNAL = 30 * HZ,
243 ATA_TMOUT_INTERNAL_QUICK = 5 * HZ,
1da177e4 244
88ff6eaf
TH		 245 /* FIXME: GoVault needs 2s but we can't afford that without
246 * parallel probing. 800ms is enough for iVDR disk
247 * HHD424020F7SV00. Increase to 2secs when parallel probing
248 * is in place.
249 */
250 ATA_TMOUT_FF_WAIT = 4 * HZ / 5,
251
705e76be
TH		 252 /* Spec mandates to wait for ">= 2ms" before checking status
253 * after reset. We wait 150ms, because that was the magic
254 * delay used for ATAPI devices in Hale Landis's ATADRVR, for
255 * the period of time between when the ATA command register is
256 * written, and then status is checked. Because waiting for
257 * "a while" before checking status is fine, post SRST, we
258 * perform this magic delay here as well.
259 *
260 * Old drivers/ide uses the 2mS rule and then waits for ready.
261 */
262 ATA_WAIT_AFTER_RESET_MSECS = 150,
263
9dadd45b
TH		 264 /* If PMP is supported, we have to do follow-up SRST. As some
265 * PMPs don't send D2H Reg FIS after hardreset, LLDs are
266 * advised to wait only for the following duration before
267 * doing SRST.
268 */
269 ATA_TMOUT_PMP_SRST_WAIT = 1 * HZ,
270
1da177e4
LT		 271 /* ATA bus states */
272 BUS_UNKNOWN = 0,
273 BUS_DMA = 1,
274 BUS_IDLE = 2,
275 BUS_NOINTR = 3,
276 BUS_NODATA = 4,
277 BUS_TIMER = 5,
278 BUS_PIO = 6,
279 BUS_EDD = 7,
280 BUS_IDENTIFY = 8,
281 BUS_PACKET = 9,
282
283 /* SATA port states */
284 PORT_UNKNOWN = 0,
285 PORT_ENABLED = 1,
286 PORT_DISABLED = 2,
287
288 /* encoding various smaller bitmaps into a single
7dc951ae 289 * unsigned long bitmap
1da177e4 290 */
70cd071e
TH		 291 ATA_NR_PIO_MODES = 7,
292 ATA_NR_MWDMA_MODES = 5,
293 ATA_NR_UDMA_MODES = 8,
1da7b0d0
TH		 294
295 ATA_SHIFT_PIO = 0,
70cd071e
TH		 296 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_NR_PIO_MODES,
297 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_NR_MWDMA_MODES,
298
cedc9a47
JG		 299 /* size of buffer to pad xfers ending on unaligned boundaries */
300 ATA_DMA_PAD_SZ = 4,
949b38af 301
0c247c55
TH		 302 /* ering size */
303 ATA_ERING_SIZE = 32,
304
31cc23b3
TH		 305 /* return values for ->qc_defer */
306 ATA_DEFER_LINK = 1,
307 ATA_DEFER_PORT = 2,
308
f3e81b19
TH		 309 /* desc_len for ata_eh_info and context */
310 ATA_EH_DESC_LEN = 80,
311
9be1e979
TH		 312 /* reset / recovery action types */
313 ATA_EH_REVALIDATE = (1 << 0),
cf480626
TH		 314 ATA_EH_SOFTRESET = (1 << 1), /* meaningful only in ->prereset */
315 ATA_EH_HARDRESET = (1 << 2), /* meaningful only in ->prereset */
316 ATA_EH_RESET = ATA_EH_SOFTRESET | ATA_EH_HARDRESET,
f9df58cb 317 ATA_EH_ENABLE_LINK = (1 << 3),
3ec25ebd 318 ATA_EH_LPM = (1 << 4), /* link power management action */
9be1e979 319
9666f400 320 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE,
9be1e979 321
f3e81b19 322 /* ata_eh_info->flags */
abdda733 323 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */
1cdaf534
TH		 324 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */
325 ATA_EHI_QUIET = (1 << 3), /* be quiet */
abdda733 326
0d64a233
TH		 327 ATA_EHI_DID_SOFTRESET = (1 << 16), /* already soft-reset this port */
328 ATA_EHI_DID_HARDRESET = (1 << 17), /* already soft-reset this port */
329 ATA_EHI_PRINTINFO = (1 << 18), /* print configuration info */
330 ATA_EHI_SETMODE = (1 << 19), /* configure transfer mode */
331 ATA_EHI_POST_SETMODE = (1 << 20), /* revaildating after setmode */
f3e81b19 332
0d64a233 333 ATA_EHI_DID_RESET = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET,
13abf50d 334
a1e10f7e
TH		 335 /* max tries if error condition is still set after ->error_handler */
336 ATA_EH_MAX_TRIES = 5,
ad9e2762 337
14d2bac1
TH		 338 /* how hard are we gonna try to probe/recover devices */
339 ATA_PROBE_MAX_TRIES = 3,
022bdb07 340 ATA_EH_DEV_TRIES = 3,
e0a71752
TH		 341 ATA_EH_PMP_TRIES = 5,
342 ATA_EH_PMP_LINK_TRIES = 3,
343
344 SATA_PMP_SCR_TIMEOUT = 250,
f5914a46 345
93590859
AC		 346 /* Horkage types. May be set by libata or controller on drives
347 (some horkage may be drive/controller pair dependant */
348
349 ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */
6919a0a6
AC		 350 ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */
351 ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */
18d6e9d5 352 ATA_HORKAGE_MAX_SEC_128 = (1 << 3), /* Limit max sects to 128 */
16c55b03 353 ATA_HORKAGE_BROKEN_HPA = (1 << 4), /* Broken HPA */
e31e8531 354 ATA_HORKAGE_SKIP_PM = (1 << 5), /* Skip PM operations */
93328e11 355 ATA_HORKAGE_HPA_SIZE = (1 << 6), /* native size off by one */
ca77329f 356 ATA_HORKAGE_IPM = (1 << 7), /* Link PM problems */
6bbfd53d 357 ATA_HORKAGE_IVB = (1 << 8), /* cbl det validity bit bugs */
2d3b8eea 358 ATA_HORKAGE_STUCK_ERR = (1 << 9), /* stuck ERR on next PACKET */
b3a70601 359
2dcb407e 360 /* DMA mask for user DMA control: User visible values; DO NOT
b3a70601
AC		 361 renumber */
362 ATA_DMA_MASK_ATA = (1 << 0), /* DMA on ATA Disk */
363 ATA_DMA_MASK_ATAPI = (1 << 1), /* DMA on ATAPI */
364 ATA_DMA_MASK_CFA = (1 << 2), /* DMA on CF Card */
ceb0c642
TH		 365
366 /* ATAPI command types */
367 ATAPI_READ = 0, /* READs */
368 ATAPI_WRITE = 1, /* WRITEs */
369 ATAPI_READ_CD = 2, /* READ CD [MSF] */
e52dcc48
TH		 370 ATAPI_PASS_THRU = 3, /* SAT pass-thru */
371 ATAPI_MISC = 4, /* the rest */
624d5c51
TH		 372
373 /* Timing constants */
374 ATA_TIMING_SETUP = (1 << 0),
375 ATA_TIMING_ACT8B = (1 << 1),
376 ATA_TIMING_REC8B = (1 << 2),
377 ATA_TIMING_CYC8B = (1 << 3),
378 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
379 ATA_TIMING_CYC8B,
380 ATA_TIMING_ACTIVE = (1 << 4),
381 ATA_TIMING_RECOVER = (1 << 5),
382 ATA_TIMING_CYCLE = (1 << 6),
383 ATA_TIMING_UDMA = (1 << 7),
384 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
385 ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
386 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
387 ATA_TIMING_CYCLE | ATA_TIMING_UDMA,
1da177e4
LT		 388};
389
7dc951ae
TH		 390enum ata_xfer_mask {
391 ATA_MASK_PIO = ((1LU << ATA_NR_PIO_MODES) - 1)
392 << ATA_SHIFT_PIO,
393 ATA_MASK_MWDMA = ((1LU << ATA_NR_MWDMA_MODES) - 1)
394 << ATA_SHIFT_MWDMA,
395 ATA_MASK_UDMA = ((1LU << ATA_NR_UDMA_MODES) - 1)
396 << ATA_SHIFT_UDMA,
397};
398
14be71f4 399enum hsm_task_states {
c56b14d2 400 HSM_ST_IDLE, /* no command on going */
71527647
AL		 401 HSM_ST_FIRST, /* (waiting the device to)
402 write CDB or first data block */
c56b14d2
AL		 403 HSM_ST, /* (waiting the device to) transfer data */
404 HSM_ST_LAST, /* (waiting the device to) complete command */
c56b14d2 405 HSM_ST_ERR, /* error */
1da177e4
LT		 406};
407
a7dac447 408enum ata_completion_errors {
11a56d24
TH		 409 AC_ERR_DEV = (1 << 0), /* device reported error */
410 AC_ERR_HSM = (1 << 1), /* host state machine violation */
411 AC_ERR_TIMEOUT = (1 << 2), /* timeout */
412 AC_ERR_MEDIA = (1 << 3), /* media error */
413 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */
414 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */
415 AC_ERR_SYSTEM = (1 << 6), /* system error */
416 AC_ERR_INVALID = (1 << 7), /* invalid argument */
417 AC_ERR_OTHER = (1 << 8), /* unknown */
55a8e2c8 418 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */
5335b729 419 AC_ERR_NCQ = (1 << 10), /* marker for offending NCQ qc */
a7dac447
JG		 420};
421
1da177e4
LT		 422/* forward declarations */
423struct scsi_device;
424struct ata_port_operations;
425struct ata_port;
cc0680a5 426struct ata_link;
1da177e4
LT		 427struct ata_queued_cmd;
428
429/* typedefs */
77853bf2 430typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
cc0680a5
TH		 431typedef int (*ata_prereset_fn_t)(struct ata_link *link, unsigned long deadline);
432typedef int (*ata_reset_fn_t)(struct ata_link *link, unsigned int *classes,
d4b2bab4 433 unsigned long deadline);
cc0680a5 434typedef void (*ata_postreset_fn_t)(struct ata_link *link, unsigned int *classes);
1da177e4 435
ca77329f
KCA		 436/*
437 * host pm policy: If you alter this, you also need to alter libata-scsi.c
438 * (for the ascii descriptions)
439 */
440enum link_pm {
441 NOT_AVAILABLE,
442 MIN_POWER,
443 MAX_PERFORMANCE,
444 MEDIUM_POWER,
445};
446extern struct class_device_attribute class_device_attr_link_power_management_policy;
447
1da177e4 448struct ata_ioports {
0d5ff566
TH		 449 void __iomem *cmd_addr;
450 void __iomem *data_addr;
451 void __iomem *error_addr;
452 void __iomem *feature_addr;
453 void __iomem *nsect_addr;
454 void __iomem *lbal_addr;
455 void __iomem *lbam_addr;
456 void __iomem *lbah_addr;
457 void __iomem *device_addr;
458 void __iomem *status_addr;
459 void __iomem *command_addr;
460 void __iomem *altstatus_addr;
461 void __iomem *ctl_addr;
462 void __iomem *bmdma_addr;
463 void __iomem *scr_addr;
1da177e4
LT		 464};
465
cca3974e 466struct ata_host {
1da177e4
LT		 467 spinlock_t lock;
468 struct device *dev;
0d5ff566 469 void __iomem * const *iomap;
1da177e4
LT		 470 unsigned int n_ports;
471 void *private_data;
029cfd6b 472 struct ata_port_operations *ops;
5444a6f4 473 unsigned long flags;
fafbae87
TH		 474#ifdef CONFIG_ATA_ACPI
475 acpi_handle acpi_handle;
476#endif
032af1ce 477 struct ata_port *simplex_claimed; /* channel owning the DMA */
f0eb62b8 478 struct ata_port *ports[0];
1da177e4
LT		 479};
480
481struct ata_queued_cmd {
482 struct ata_port *ap;
483 struct ata_device *dev;
484
485 struct scsi_cmnd *scsicmd;
486 void (*scsidone)(struct scsi_cmnd *);
487
488 struct ata_taskfile tf;
489 u8 cdb[ATAPI_CDB_LEN];
490
491 unsigned long flags; /* ATA_QCFLAG_xxx */
492 unsigned int tag;
493 unsigned int n_elem;
494
495 int dma_dir;
496
5a5dbd18 497 unsigned int sect_size;
cedc9a47 498
1da177e4 499 unsigned int nbytes;
aacda375 500 unsigned int extrabytes;
1da177e4
LT		 501 unsigned int curbytes;
502
87260216 503 struct scatterlist *cursg;
1da177e4
LT		 504 unsigned int cursg_ofs;
505
506 struct scatterlist sgent;
1da177e4 507
ff2aeb1e 508 struct scatterlist *sg;
1da177e4 509
a22e2eb0 510 unsigned int err_mask;
e61e0672 511 struct ata_taskfile result_tf;
1da177e4
LT		 512 ata_qc_cb_t complete_fn;
513
1da177e4 514 void *private_data;
1c50dc83 515 void *lldd_task;
1da177e4
LT		 516};
517
cca3974e 518struct ata_port_stats {
1da177e4
LT		 519 unsigned long unhandled_irq;
520 unsigned long idle_irq;
521 unsigned long rw_reqbuf;
522};
523
0c247c55 524struct ata_ering_entry {
3884f7b0 525 unsigned int eflags;
0c247c55
TH		 526 unsigned int err_mask;
527 u64 timestamp;
528};
529
530struct ata_ering {
531 int cursor;
532 struct ata_ering_entry ring[ATA_ERING_SIZE];
533};
534
1da177e4 535struct ata_device {
9af5c9c9 536 struct ata_link *link;
72fa4b74 537 unsigned int devno; /* 0 or 1 */
1da177e4 538 unsigned long flags; /* ATA_DFLAG_xxx */
75683fe7 539 unsigned int horkage; /* List of broken features */
3edebac4 540 struct scsi_device *sdev; /* attached SCSI device */
fafbae87
TH		 541#ifdef CONFIG_ATA_ACPI
542 acpi_handle acpi_handle;
398e0782 543 union acpi_object *gtf_cache;
fafbae87 544#endif
72fa4b74
TH		 545 /* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */
546 u64 n_sectors; /* size of device, if ATA */
1da177e4 547 unsigned int class; /* ATA_DEV_xxx */
e0a71752
TH		 548
549 union {
550 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
551 u32 gscr[SATA_PMP_GSCR_DWORDS]; /* PMP GSCR block */
552 };
553
1da177e4
LT		 554 u8 pio_mode;
555 u8 dma_mode;
556 u8 xfer_mode;
557 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
558
8cbd6df1
AL		 559 unsigned int multi_count; /* sectors count for
560 READ/WRITE MULTIPLE */
b00eec1d 561 unsigned int max_sectors; /* per-device max sectors */
6e7846e9 562 unsigned int cdb_len;
8bf62ece 563
acf356b1 564 /* per-dev xfer mask */
7dc951ae
TH		 565 unsigned long pio_mask;
566 unsigned long mwdma_mask;
567 unsigned long udma_mask;
acf356b1 568
8bf62ece
AL		 569 /* for CHS addressing */
570 u16 cylinders; /* Number of cylinders */
571 u16 heads; /* Number of heads */
572 u16 sectors; /* Number of sectors per track */
0c247c55
TH		 573
574 /* error history */
575 struct ata_ering ering;
7d47e8d4 576 int spdn_cnt;
1da177e4
LT		 577};
578
72fa4b74
TH		 579/* Offset into struct ata_device. Fields above it are maintained
580 * acress device init. Fields below are zeroed.
581 */
582#define ATA_DEVICE_CLEAR_OFFSET offsetof(struct ata_device, n_sectors)
583
f3e81b19
TH		 584struct ata_eh_info {
585 struct ata_device *dev; /* offending device */
586 u32 serror; /* SError from LLDD */
587 unsigned int err_mask; /* port-wide err_mask */
588 unsigned int action; /* ATA_EH_* action mask */
47005f25 589 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */
f3e81b19 590 unsigned int flags; /* ATA_EHI_* flags */
abdda733 591
abdda733
TH		 592 unsigned int probe_mask;
593
f3e81b19
TH		 594 char desc[ATA_EH_DESC_LEN];
595 int desc_len;
596};
597
598struct ata_eh_context {
599 struct ata_eh_info i;
600 int tries[ATA_MAX_DEVICES];
abdda733
TH		 601 unsigned int classes[ATA_MAX_DEVICES];
602 unsigned int did_probe_mask;
00115e0f
TH		 603 unsigned int saved_ncq_enabled;
604 u8 saved_xfer_mode[ATA_MAX_DEVICES];
f3e81b19
TH		 605};
606
64578a3d
TH		 607struct ata_acpi_drive
608{
609 u32 pio;
610 u32 dma;
611} __packed;
612
613struct ata_acpi_gtm {
614 struct ata_acpi_drive drive[2];
615 u32 flags;
616} __packed;
617
9af5c9c9
TH		 618struct ata_link {
619 struct ata_port *ap;
8989805d 620 int pmp; /* port multiplier port # */
9af5c9c9
TH		 621
622 unsigned int active_tag; /* active tag on this link */
623 u32 sactive; /* active NCQ commands */
624
0c88758b
TH		 625 unsigned int flags; /* ATA_LFLAG_xxx */
626
9af5c9c9
TH		 627 unsigned int hw_sata_spd_limit;
628 unsigned int sata_spd_limit;
629 unsigned int sata_spd; /* current SATA PHY speed */
630
631 /* record runtime error info, protected by host_set lock */
632 struct ata_eh_info eh_info;
633 /* EH context */
634 struct ata_eh_context eh_context;
635
636 struct ata_device device[ATA_MAX_DEVICES];
637};
638
1da177e4 639struct ata_port {
cca3974e 640 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */
029cfd6b 641 struct ata_port_operations *ops;
ba6a1308 642 spinlock_t *lock;
1da177e4 643 unsigned long flags; /* ATA_FLAG_xxx */
b51e9e5d 644 unsigned int pflags; /* ATA_PFLAG_xxx */
44877b4e
TH		 645 unsigned int print_id; /* user visible unique port ID */
646 unsigned int port_no; /* 0 based port no. inside the host */
1da177e4
LT		 647
648 struct ata_prd *prd; /* our SG list */
649 dma_addr_t prd_dma; /* and its DMA mapping */
650
651 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
652
653 u8 ctl; /* cache of ATA control register */
654 u8 last_ctl; /* Cache last written value */
1da177e4
LT		 655 unsigned int pio_mask;
656 unsigned int mwdma_mask;
657 unsigned int udma_mask;
658 unsigned int cbl; /* cable type; ATA_CBL_xxx */
1da177e4
LT		 659
660 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
6cec4a39 661 unsigned long qc_allocated;
dedaf2b0 662 unsigned int qc_active;
da917d69 663 int nr_active_links; /* #links with active qcs */
dedaf2b0 664
9af5c9c9 665 struct ata_link link; /* host default link */
1da177e4 666
8989805d
TH		 667 int nr_pmp_links; /* nr of available PMP links */
668 struct ata_link *pmp_link; /* array of PMP links */
da917d69 669 struct ata_link *excl_link; /* for PMP qc exclusion */
8989805d 670
cca3974e
JG		 671 struct ata_port_stats stats;
672 struct ata_host *host;
2f1f610b 673 struct device *dev;
1da177e4 674
65f27f38 675 void *port_task_data;
52bad64d
DH		 676 struct delayed_work port_task;
677 struct delayed_work hotplug_task;
3b01b8af 678 struct work_struct scsi_rescan_task;
86e45b6b 679
14be71f4 680 unsigned int hsm_task_state;
1da177e4 681
bfd60579 682 u32 msg_enable;
a72ec4ce 683 struct list_head eh_done_q;
c6cf9e99 684 wait_queue_head_t eh_wait_q;
a1e10f7e 685 int eh_tries;
bfd60579 686
500530f6
TH		 687 pm_message_t pm_mesg;
688 int *pm_result;
ca77329f 689 enum link_pm pm_policy;
500530f6 690
5ddf24c5
TH		 691 struct timer_list fastdrain_timer;
692 unsigned long fastdrain_cnt;
693
1da177e4 694 void *private_data;
fe635c7e 695
fafbae87
TH		 696#ifdef CONFIG_ATA_ACPI
697 acpi_handle acpi_handle;
c05e6ff0 698 struct ata_acpi_gtm __acpi_init_gtm; /* use ata_acpi_init_gtm() */
fafbae87 699#endif
fe635c7e 700 u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */
1da177e4
LT		 701};
702
029cfd6b
TH		 703/* The following initializer overrides a method to NULL whether one of
704 * its parent has the method defined or not. This is equivalent to
705 * ERR_PTR(-ENOENT). Unfortunately, ERR_PTR doesn't render a constant
706 * expression and thus can't be used as an initializer.
707 */
708#define ATA_OP_NULL (void *)(unsigned long)(-ENOENT)
709
1da177e4 710struct ata_port_operations {
c1bc899f
TH		 711 /*
712 * Command execution
713 */
714 int (*qc_defer)(struct ata_queued_cmd *qc);
715 int (*check_atapi_dma)(struct ata_queued_cmd *qc);
716 void (*qc_prep)(struct ata_queued_cmd *qc);
717 unsigned int (*qc_issue)(struct ata_queued_cmd *qc);
1da177e4 718
c1bc899f
TH		 719 /*
720 * Configuration and exception handling
721 */
722 int (*cable_detect)(struct ata_port *ap);
723 unsigned long (*mode_filter)(struct ata_device *dev, unsigned long xfer_mask);
724 void (*set_piomode)(struct ata_port *ap, struct ata_device *dev);
725 void (*set_dmamode)(struct ata_port *ap, struct ata_device *dev);
726 int (*set_mode)(struct ata_link *link, struct ata_device **r_failed_dev);
1da177e4 727
c1bc899f 728 void (*dev_config)(struct ata_device *dev);
1da177e4 729
c1bc899f
TH		 730 void (*freeze)(struct ata_port *ap);
731 void (*thaw)(struct ata_port *ap);
a1efdaba
TH		 732 ata_prereset_fn_t prereset;
733 ata_reset_fn_t softreset;
734 ata_reset_fn_t hardreset;
735 ata_postreset_fn_t postreset;
736 ata_prereset_fn_t pmp_prereset;
737 ata_reset_fn_t pmp_softreset;
738 ata_reset_fn_t pmp_hardreset;
739 ata_postreset_fn_t pmp_postreset;
c1bc899f
TH		 740 void (*error_handler)(struct ata_port *ap);
741 void (*post_internal_cmd)(struct ata_queued_cmd *qc);
742
743 /*
744 * Optional features
745 */
746 int (*scr_read)(struct ata_port *ap, unsigned int sc_reg, u32 *val);
747 int (*scr_write)(struct ata_port *ap, unsigned int sc_reg, u32 val);
748 void (*pmp_attach)(struct ata_port *ap);
749 void (*pmp_detach)(struct ata_port *ap);
750 int (*enable_pm)(struct ata_port *ap, enum link_pm policy);
751 void (*disable_pm)(struct ata_port *ap);
752
753 /*
754 * Start, stop, suspend and resume
755 */
756 int (*port_suspend)(struct ata_port *ap, pm_message_t mesg);
757 int (*port_resume)(struct ata_port *ap);
758 int (*port_start)(struct ata_port *ap);
759 void (*port_stop)(struct ata_port *ap);
760 void (*host_stop)(struct ata_host *host);
761
762 /*
763 * SFF / taskfile oriented ops
764 */
5682ed33
TH		 765 void (*sff_dev_select)(struct ata_port *ap, unsigned int device);
766 u8 (*sff_check_status)(struct ata_port *ap);
767 u8 (*sff_check_altstatus)(struct ata_port *ap);
768 void (*sff_tf_load)(struct ata_port *ap, const struct ata_taskfile *tf);
769 void (*sff_tf_read)(struct ata_port *ap, struct ata_taskfile *tf);
770 void (*sff_exec_command)(struct ata_port *ap,
771 const struct ata_taskfile *tf);
772 unsigned int (*sff_data_xfer)(struct ata_device *dev,
773 unsigned char *buf, unsigned int buflen, int rw);
774 u8 (*sff_irq_on)(struct ata_port *);
775 void (*sff_irq_clear)(struct ata_port *);
776
c1bc899f
TH		 777 void (*bmdma_setup)(struct ata_queued_cmd *qc);
778 void (*bmdma_start)(struct ata_queued_cmd *qc);
779 void (*bmdma_stop)(struct ata_queued_cmd *qc);
780 u8 (*bmdma_status)(struct ata_port *ap);
781
782 /*
783 * Obsolete
9ec957f2 784 */
c1bc899f
TH		 785 void (*phy_reset)(struct ata_port *ap);
786 void (*eng_timeout)(struct ata_port *ap);
029cfd6b
TH		 787
788 /*
789 * ->inherits must be the last field and all the preceding
790 * fields must be pointers.
791 */
792 const struct ata_port_operations *inherits;
1da177e4
LT		 793};
794
795struct ata_port_info {
cca3974e 796 unsigned long flags;
0c88758b 797 unsigned long link_flags;
1da177e4
LT		 798 unsigned long pio_mask;
799 unsigned long mwdma_mask;
800 unsigned long udma_mask;
029cfd6b 801 struct ata_port_operations *port_ops;
e99f8b5e 802 void *private_data;
1da177e4
LT		 803};
804
452503f9
AC		 805struct ata_timing {
806 unsigned short mode; /* ATA mode */
807 unsigned short setup; /* t1 */
808 unsigned short act8b; /* t2 for 8-bit I/O */
809 unsigned short rec8b; /* t2i for 8-bit I/O */
810 unsigned short cyc8b; /* t0 for 8-bit I/O */
811 unsigned short active; /* t2 or tD */
812 unsigned short recover; /* t2i or tK */
813 unsigned short cycle; /* t0 */
814 unsigned short udma; /* t2CYCTYP/2 */
815};
816
2dcb407e 817#define FIT(v, vmin, vmax) max_t(short, min_t(short, v, vmax), vmin)
1da177e4 818
624d5c51
TH		 819/*
820 * Core layer - drivers/ata/libata-core.c
821 */
e9c83914
TH		 822extern const unsigned long sata_deb_timing_normal[];
823extern const unsigned long sata_deb_timing_hotplug[];
824extern const unsigned long sata_deb_timing_long[];
825
029cfd6b 826extern struct ata_port_operations ata_dummy_port_ops;
21b0ad4f 827extern const struct ata_port_info ata_dummy_port_info;
dd5b06c4 828
e9c83914
TH		 829static inline const unsigned long *
830sata_ehc_deb_timing(struct ata_eh_context *ehc)
831{
832 if (ehc->i.flags & ATA_EHI_HOTPLUGGED)
833 return sata_deb_timing_hotplug;
834 else
835 return sata_deb_timing_normal;
836}
d7bb4cc7 837
dd5b06c4
TH		 838static inline int ata_port_is_dummy(struct ata_port *ap)
839{
840 return ap->ops == &ata_dummy_port_ops;
841}
842
936fd732 843extern void sata_print_link_status(struct ata_link *link);
1da177e4 844extern void ata_port_probe(struct ata_port *);
936fd732 845extern int sata_set_spd(struct ata_link *link);
0aa1113d 846extern int ata_std_prereset(struct ata_link *link, unsigned long deadline);
aa2731ad
TH		 847extern int ata_wait_after_reset(struct ata_link *link, unsigned long deadline,
848 int (*check_ready)(struct ata_link *link));
936fd732
TH		 849extern int sata_link_debounce(struct ata_link *link,
850 const unsigned long *params, unsigned long deadline);
851extern int sata_link_resume(struct ata_link *link, const unsigned long *params,
852 unsigned long deadline);
cc0680a5 853extern int sata_link_hardreset(struct ata_link *link,
9dadd45b
TH		 854 const unsigned long *timing, unsigned long deadline,
855 bool *online, int (*check_ready)(struct ata_link *));
203c75b8 856extern void ata_std_postreset(struct ata_link *link, unsigned int *classes);
1da177e4 857extern void ata_port_disable(struct ata_port *);
2855568b 858
f3187195 859extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports);
f5cda257
TH		 860extern struct ata_host *ata_host_alloc_pinfo(struct device *dev,
861 const struct ata_port_info * const * ppi, int n_ports);
ecef7253 862extern int ata_host_start(struct ata_host *host);
f3187195
TH		 863extern int ata_host_register(struct ata_host *host,
864 struct scsi_host_template *sht);
f5cda257
TH		 865extern int ata_host_activate(struct ata_host *host, int irq,
866 irq_handler_t irq_handler, unsigned long irq_flags,
867 struct scsi_host_template *sht);
0529c159 868extern void ata_host_detach(struct ata_host *host);
cca3974e 869extern void ata_host_init(struct ata_host *, struct device *,
029cfd6b 870 unsigned long, struct ata_port_operations *);
193515d5 871extern int ata_scsi_detect(struct scsi_host_template *sht);
1da177e4
LT		 872extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
873extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *));
80289167 874extern void ata_sas_port_destroy(struct ata_port *);
cca3974e 875extern struct ata_port *ata_sas_port_alloc(struct ata_host *,
80289167
BK		 876 struct ata_port_info *, struct Scsi_Host *);
877extern int ata_sas_port_init(struct ata_port *);
878extern int ata_sas_port_start(struct ata_port *ap);
879extern void ata_sas_port_stop(struct ata_port *ap);
880extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *);
881extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
882 struct ata_port *ap);
936fd732
TH		 883extern int sata_scr_valid(struct ata_link *link);
884extern int sata_scr_read(struct ata_link *link, int reg, u32 *val);
885extern int sata_scr_write(struct ata_link *link, int reg, u32 val);
886extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val);
887extern int ata_link_online(struct ata_link *link);
888extern int ata_link_offline(struct ata_link *link);
6ffa01d8 889#ifdef CONFIG_PM
cca3974e
JG		 890extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg);
891extern void ata_host_resume(struct ata_host *host);
6ffa01d8 892#endif
67846b30 893extern int ata_ratelimit(void);
c22daff4
TH		 894extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
895 unsigned long interval_msec,
896 unsigned long timeout_msec);
436d34b3 897extern int atapi_cmd_type(u8 opcode);
9977126c
TH		 898extern void ata_tf_to_fis(const struct ata_taskfile *tf,
899 u8 pmp, int is_cmd, u8 *fis);
057ace5e 900extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
7dc951ae
TH		 901extern unsigned long ata_pack_xfermask(unsigned long pio_mask,
902 unsigned long mwdma_mask, unsigned long udma_mask);
903extern void ata_unpack_xfermask(unsigned long xfer_mask,
904 unsigned long *pio_mask, unsigned long *mwdma_mask,
905 unsigned long *udma_mask);
906extern u8 ata_xfer_mask2mode(unsigned long xfer_mask);
907extern unsigned long ata_xfer_mode2mask(u8 xfer_mode);
908extern int ata_xfer_mode2shift(unsigned long xfer_mode);
909extern const char *ata_mode_string(unsigned long xfer_mask);
910extern unsigned long ata_id_xfermask(const u16 *id);
2dcb407e 911extern void ata_noop_dev_select(struct ata_port *ap, unsigned int device);
2dcb407e 912extern int ata_port_start(struct ata_port *ap);
31cc23b3 913extern int ata_std_qc_defer(struct ata_queued_cmd *qc);
e46834cd 914extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
1da177e4
LT		 915extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
916 unsigned int n_elem);
057ace5e 917extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
10305f0f 918extern void ata_dev_disable(struct ata_device *adev);
6a62a04d
TH		 919extern void ata_id_string(const u16 *id, unsigned char *s,
920 unsigned int ofs, unsigned int len);
921extern void ata_id_c_string(const u16 *id, unsigned char *s,
922 unsigned int ofs, unsigned int len);
f686bcb8 923extern void ata_qc_complete(struct ata_queued_cmd *qc);
dedaf2b0
TH		 924extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active,
925 void (*finish_qc)(struct ata_queued_cmd *));
3373efd8 926extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
1da177e4
LT		 927 void (*done)(struct scsi_cmnd *));
928extern int ata_std_bios_param(struct scsi_device *sdev,
929 struct block_device *bdev,
930 sector_t capacity, int geom[]);
931extern int ata_scsi_slave_config(struct scsi_device *sdev);
83c47bcb 932extern void ata_scsi_slave_destroy(struct scsi_device *sdev);
a6e6ce8e
TH		 933extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
934 int queue_depth);
3373efd8 935extern struct ata_device *ata_dev_pair(struct ata_device *adev);
0260731f 936extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev);
1da177e4 937
be0d18df
AC		 938extern int ata_cable_40wire(struct ata_port *ap);
939extern int ata_cable_80wire(struct ata_port *ap);
940extern int ata_cable_sata(struct ata_port *ap);
c88f90c3 941extern int ata_cable_ignore(struct ata_port *ap);
be0d18df
AC		 942extern int ata_cable_unknown(struct ata_port *ap);
943
624d5c51 944/* Timing helpers */
1bc4ccff 945extern unsigned int ata_pio_need_iordy(const struct ata_device *);
6357357c 946extern const struct ata_timing *ata_timing_find_mode(u8 xfer_mode);
452503f9
AC		 947extern int ata_timing_compute(struct ata_device *, unsigned short,
948 struct ata_timing *, int, int);
949extern void ata_timing_merge(const struct ata_timing *,
950 const struct ata_timing *, struct ata_timing *,
951 unsigned int);
a0f79b92 952extern u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle);
452503f9 953
624d5c51
TH		 954/* PCI */
955#ifdef CONFIG_PCI
956struct pci_dev;
957
958struct pci_bits {
959 unsigned int reg; /* PCI config register to read */
960 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
961 unsigned long mask;
962 unsigned long val;
452503f9
AC		 963};
964
624d5c51
TH		 965extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
966extern void ata_pci_remove_one(struct pci_dev *pdev);
967
968#ifdef CONFIG_PM
969extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg);
970extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev);
971extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
972extern int ata_pci_device_resume(struct pci_dev *pdev);
973#endif /* CONFIG_PM */
974#endif /* CONFIG_PCI */
975
976/*
977 * ACPI - drivers/ata/libata-acpi.c
978 */
e1ddb4b6 979#ifdef CONFIG_ATA_ACPI
c05e6ff0
TH		 980static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
981{
982 if (ap->pflags & ATA_PFLAG_INIT_GTM_VALID)
983 return &ap->__acpi_init_gtm;
984 return NULL;
985}
0d02f0b2
TH		 986int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm);
987int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *stm);
7c77fa4d
TH		 988unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev,
989 const struct ata_acpi_gtm *gtm);
021ee9a6 990int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm);
e1ddb4b6 991#else
c05e6ff0
TH		 992static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
993{
994 return NULL;
995}
7c77fa4d
TH		 996
997static inline int ata_acpi_stm(const struct ata_port *ap,
998 struct ata_acpi_gtm *stm)
999{
1000 return -ENOSYS;
1001}
1002
1003static inline int ata_acpi_gtm(const struct ata_port *ap,
1004 struct ata_acpi_gtm *stm)
1005{
1006 return -ENOSYS;
1007}
1008
1009static inline unsigned int ata_acpi_gtm_xfermask(struct ata_device *dev,
1010 const struct ata_acpi_gtm *gtm)
1011{
1012 return 0;
1013}
021ee9a6
TH		 1014
1015static inline int ata_acpi_cbl_80wire(struct ata_port *ap,
1016 const struct ata_acpi_gtm *gtm)
1017{
1018 return 0;
1019}
e1ddb4b6 1020#endif
1da177e4 1021
3af9a77a 1022/*
624d5c51 1023 * PMP - drivers/ata/libata-pmp.c
3af9a77a 1024 */
31f88384 1025extern int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc);
3af9a77a
TH		 1026extern int sata_pmp_std_prereset(struct ata_link *link, unsigned long deadline);
1027extern int sata_pmp_std_hardreset(struct ata_link *link, unsigned int *class,
1028 unsigned long deadline);
1029extern void sata_pmp_std_postreset(struct ata_link *link, unsigned int *class);
a1efdaba 1030extern void sata_pmp_error_handler(struct ata_port *ap);
3af9a77a 1031
ece1d636 1032/*
624d5c51 1033 * EH - drivers/ata/libata-eh.c
ece1d636 1034 */
7b70fc03 1035extern void ata_port_schedule_eh(struct ata_port *ap);
dbd82616 1036extern int ata_link_abort(struct ata_link *link);
7b70fc03 1037extern int ata_port_abort(struct ata_port *ap);
e3180499 1038extern int ata_port_freeze(struct ata_port *ap);
7d77b247 1039extern int sata_async_notification(struct ata_port *ap);
e3180499
TH		 1040
1041extern void ata_eh_freeze_port(struct ata_port *ap);
1042extern void ata_eh_thaw_port(struct ata_port *ap);
7b70fc03 1043
ece1d636
TH		 1044extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
1045extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
1046
f5914a46
TH		 1047extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
1048 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
1049 ata_postreset_fn_t postreset);
a1efdaba 1050extern void ata_std_error_handler(struct ata_port *ap);
022bdb07 1051
68d1d07b
TH		 1052/*
1053 * Base operations to inherit from and initializers for sht
1054 *
1055 * Operations
1056 *
1057 * base : Common to all libata drivers.
1058 * sata : SATA controllers w/ native interface.
1059 * pmp : SATA controllers w/ PMP support.
1060 * sff : SFF ATA controllers w/o BMDMA support.
1061 * bmdma : SFF ATA controllers w/ BMDMA support.
1062 *
1063 * sht initializers
1064 *
1065 * BASE : Common to all libata drivers. The user must set
1066 * sg_tablesize and dma_boundary.
1067 * PIO : SFF ATA controllers w/ only PIO support.
1068 * BMDMA : SFF ATA controllers w/ BMDMA support. sg_tablesize and
1069 * dma_boundary are set to BMDMA limits.
1070 * NCQ : SATA controllers supporting NCQ. The user must set
1071 * sg_tablesize, dma_boundary and can_queue.
1072 */
1073extern const struct ata_port_operations ata_base_port_ops;
1074extern const struct ata_port_operations sata_port_ops;
1075extern const struct ata_port_operations sata_pmp_port_ops;
68d1d07b
TH		 1076
1077#define ATA_BASE_SHT(drv_name) \
1078 .module = THIS_MODULE, \
1079 .name = drv_name, \
1080 .ioctl = ata_scsi_ioctl, \
1081 .queuecommand = ata_scsi_queuecmd, \
1082 .can_queue = ATA_DEF_QUEUE, \
1083 .this_id = ATA_SHT_THIS_ID, \
1084 .cmd_per_lun = ATA_SHT_CMD_PER_LUN, \
1085 .emulated = ATA_SHT_EMULATED, \
1086 .use_clustering = ATA_SHT_USE_CLUSTERING, \
1087 .proc_name = drv_name, \
1088 .slave_configure = ata_scsi_slave_config, \
1089 .slave_destroy = ata_scsi_slave_destroy, \
1090 .bios_param = ata_std_bios_param
1091
68d1d07b
TH		 1092#define ATA_NCQ_SHT(drv_name) \
1093 ATA_BASE_SHT(drv_name), \
1094 .change_queue_depth = ata_scsi_change_queue_depth
1095
61440db6
TH		 1096/*
1097 * printk helpers
1098 */
1099#define ata_port_printk(ap, lv, fmt, args...) \
c2e366a1 1100 printk("%sata%u: "fmt, lv, (ap)->print_id , ##args)
61440db6 1101
8989805d
TH		 1102#define ata_link_printk(link, lv, fmt, args...) do { \
1103 if ((link)->ap->nr_pmp_links) \
c2e366a1 1104 printk("%sata%u.%02u: "fmt, lv, (link)->ap->print_id, \
8989805d
TH		 1105 (link)->pmp , ##args); \
1106 else \
c2e366a1 1107 printk("%sata%u: "fmt, lv, (link)->ap->print_id , ##args); \
8989805d 1108 } while(0)
9af5c9c9 1109
61440db6 1110#define ata_dev_printk(dev, lv, fmt, args...) \
c2e366a1 1111 printk("%sata%u.%02u: "fmt, lv, (dev)->link->ap->print_id, \
8989805d 1112 (dev)->link->pmp + (dev)->devno , ##args)
1da177e4 1113
f3e81b19
TH		 1114/*
1115 * ata_eh_info helpers
1116 */
cb94c1cf
TH		 1117extern void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...)
1118 __attribute__ ((format (printf, 2, 3)));
1119extern void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...)
1120 __attribute__ ((format (printf, 2, 3)));
b64bbc39 1121extern void ata_ehi_clear_desc(struct ata_eh_info *ehi);
f3e81b19 1122
c0b6c037
TH		 1123static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
1124{
b558eddd 1125 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
f8f1e1cc 1126 ehi->flags |= ATA_EHI_HOTPLUGGED;
b558eddd 1127 ehi->action |= ATA_EH_RESET | ATA_EH_ENABLE_LINK;
c0b6c037
TH		 1128 ehi->err_mask |= AC_ERR_ATA_BUS;
1129}
1130
cbcdd875
TH		 1131/*
1132 * port description helpers
1133 */
1134extern void ata_port_desc(struct ata_port *ap, const char *fmt, ...)
1135 __attribute__ ((format (printf, 2, 3)));
1136#ifdef CONFIG_PCI
1137extern void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset,
1138 const char *name);
1139#endif
1140
1da177e4
LT		 1141static inline unsigned int ata_tag_valid(unsigned int tag)
1142{
1143 return (tag < ATA_MAX_QUEUE) ? 1 : 0;
1144}
1145
2ab7db1f
TH		 1146static inline unsigned int ata_tag_internal(unsigned int tag)
1147{
83c063dd 1148 return tag == ATA_TAG_INTERNAL;
2ab7db1f
TH		 1149}
1150
5806db22
TH		 1151/*
1152 * device helpers
1153 */
e1211e3f 1154static inline unsigned int ata_class_enabled(unsigned int class)
597afd21 1155{
e0a71752
TH		 1156 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI ||
1157 class == ATA_DEV_PMP || class == ATA_DEV_SEMB;
597afd21
TH		 1158}
1159
e1211e3f 1160static inline unsigned int ata_class_disabled(unsigned int class)
1da177e4 1161{
e0a71752
TH		 1162 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP ||
1163 class == ATA_DEV_PMP_UNSUP || class == ATA_DEV_SEMB_UNSUP;
e1211e3f
TH		 1164}
1165
002c8054
TH		 1166static inline unsigned int ata_class_absent(unsigned int class)
1167{
1168 return !ata_class_enabled(class) && !ata_class_disabled(class);
1169}
1170
e1211e3f
TH		 1171static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
1172{
1173 return ata_class_enabled(dev->class);
1174}
1175
1176static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
1177{
1178 return ata_class_disabled(dev->class);
1da177e4
LT		 1179}
1180
002c8054
TH		 1181static inline unsigned int ata_dev_absent(const struct ata_device *dev)
1182{
1183 return ata_class_absent(dev->class);
1184}
1185
5806db22 1186/*
f58229f8 1187 * link helpers
5806db22 1188 */
8989805d
TH		 1189static inline int ata_is_host_link(const struct ata_link *link)
1190{
1191 return link == &link->ap->link;
1192}
1193
f58229f8 1194static inline int ata_link_max_devices(const struct ata_link *link)
5806db22 1195{
8989805d 1196 if (ata_is_host_link(link) && link->ap->flags & ATA_FLAG_SLAVE_POSS)
5806db22
TH		 1197 return 2;
1198 return 1;
1199}
1200
da917d69
TH		 1201static inline int ata_link_active(struct ata_link *link)
1202{
1203 return ata_tag_valid(link->active_tag) || link->sactive;
1204}
1205
8989805d
TH		 1206static inline struct ata_link *ata_port_first_link(struct ata_port *ap)
1207{
1208 if (ap->nr_pmp_links)
1209 return ap->pmp_link;
1210 return &ap->link;
1211}
1212
1213static inline struct ata_link *ata_port_next_link(struct ata_link *link)
1214{
1215 struct ata_port *ap = link->ap;
1216
1217 if (link == &ap->link) {
1218 if (!ap->nr_pmp_links)
1219 return NULL;
1220 return ap->pmp_link;
1221 }
1222
5d44b414 1223 if (++link < ap->nr_pmp_links + ap->pmp_link)
8989805d
TH		 1224 return link;
1225 return NULL;
1226}
1227
1228#define __ata_port_for_each_link(lk, ap) \
1229 for ((lk) = &(ap)->link; (lk); (lk) = ata_port_next_link(lk))
1230
1231#define ata_port_for_each_link(link, ap) \
1232 for ((link) = ata_port_first_link(ap); (link); \
1233 (link) = ata_port_next_link(link))
f58229f8
TH		 1234
1235#define ata_link_for_each_dev(dev, link) \
1236 for ((dev) = (link)->device; \
1237 (dev) < (link)->device + ata_link_max_devices(link) || ((dev) = NULL); \
1238 (dev)++)
1239
1240#define ata_link_for_each_dev_reverse(dev, link) \
1241 for ((dev) = (link)->device + ata_link_max_devices(link) - 1; \
1242 (dev) >= (link)->device || ((dev) = NULL); (dev)--)
5806db22 1243
6d1245bf
TH		 1244/**
1245 * ata_ncq_enabled - Test whether NCQ is enabled
1246 * @dev: ATA device to test for
1247 *
1248 * LOCKING:
1249 * spin_lock_irqsave(host lock)
1250 *
1251 * RETURNS:
1252 * 1 if NCQ is enabled for @dev, 0 otherwise.
1253 */
1254static inline int ata_ncq_enabled(struct ata_device *dev)
1255{
1256 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF |
1257 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ;
1258}
0baab86b 1259
1da177e4
LT		 1260static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
1261{
1262 qc->tf.ctl |= ATA_NIEN;
1263}
1264
f69499f4
TH		 1265static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap,
1266 unsigned int tag)
1da177e4
LT		 1267{
1268 if (likely(ata_tag_valid(tag)))
1269 return &ap->qcmd[tag];
1270 return NULL;
1271}
1272
f69499f4
TH		 1273static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap,
1274 unsigned int tag)
1275{
1276 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
1277
1278 if (unlikely(!qc) || !ap->ops->error_handler)
1279 return qc;
1280
1281 if ((qc->flags & (ATA_QCFLAG_ACTIVE |
1282 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE)
1283 return qc;
1284
1285 return NULL;
1286}
1287
aacda375
TH		 1288static inline unsigned int ata_qc_raw_nbytes(struct ata_queued_cmd *qc)
1289{
1290 return qc->nbytes - min(qc->extrabytes, qc->nbytes);
1291}
1292
3373efd8 1293static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
1da177e4
LT		 1294{
1295 memset(tf, 0, sizeof(*tf));
1296
9af5c9c9 1297 tf->ctl = dev->link->ap->ctl;
3373efd8 1298 if (dev->devno == 0)
1da177e4
LT		 1299 tf->device = ATA_DEVICE_OBS;
1300 else
1301 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
1302}
1303
2c13b7ce
JG		 1304static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
1305{
501e0c50 1306 qc->dma_dir = DMA_NONE;
ff2aeb1e 1307 qc->sg = NULL;
2c13b7ce 1308 qc->flags = 0;
87260216
JA		 1309 qc->cursg = NULL;
1310 qc->cursg_ofs = 0;
aacda375 1311 qc->nbytes = qc->extrabytes = qc->curbytes = 0;
7a801184 1312 qc->n_elem = 0;
a22e2eb0 1313 qc->err_mask = 0;
5a5dbd18 1314 qc->sect_size = ATA_SECT_SIZE;
2c13b7ce 1315
3373efd8 1316 ata_tf_init(qc->dev, &qc->tf);
e61e0672
TH		 1317
1318 /* init result_tf such that it indicates normal completion */
1319 qc->result_tf.command = ATA_DRDY;
1320 qc->result_tf.feature = 0;
2c13b7ce
JG		 1321}
1322
057ace5e 1323static inline int ata_try_flush_cache(const struct ata_device *dev)
1da177e4
LT		 1324{
1325 return ata_id_wcache_enabled(dev->id) ||
1326 ata_id_has_flush(dev->id) ||
1327 ata_id_has_flush_ext(dev->id);
1328}
1329
a7dac447
JG		 1330static inline unsigned int ac_err_mask(u8 status)
1331{
3655d1d3 1332 if (status & (ATA_BUSY | ATA_DRQ))
11a56d24 1333 return AC_ERR_HSM;
a7dac447
JG		 1334 if (status & (ATA_ERR | ATA_DF))
1335 return AC_ERR_DEV;
1336 return 0;
1337}
1338
1339static inline unsigned int __ac_err_mask(u8 status)
1340{
1341 unsigned int mask = ac_err_mask(status);
1342 if (mask == 0)
1343 return AC_ERR_OTHER;
1344 return mask;
1345}
1346
35bb94b1
JG		 1347static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
1348{
4911487a 1349 return *(struct ata_port **)&host->hostdata[0];
35bb94b1
JG		 1350}
1351
624d5c51
TH		 1352/**************************************************************************
1353 * SFF - drivers/ata/libata-sff.c
1354 */
1355extern const struct ata_port_operations ata_sff_port_ops;
1356extern const struct ata_port_operations ata_bmdma_port_ops;
1357
1358/* PIO only, sg_tablesize and dma_boundary limits can be removed */
1359#define ATA_PIO_SHT(drv_name) \
1360 ATA_BASE_SHT(drv_name), \
1361 .sg_tablesize = LIBATA_MAX_PRD, \
1362 .dma_boundary = ATA_DMA_BOUNDARY
1363
1364#define ATA_BMDMA_SHT(drv_name) \
1365 ATA_BASE_SHT(drv_name), \
1366 .sg_tablesize = LIBATA_MAX_PRD, \
1367 .dma_boundary = ATA_DMA_BOUNDARY
1368
9363c382
TH		 1369extern void ata_sff_qc_prep(struct ata_queued_cmd *qc);
1370extern void ata_sff_dumb_qc_prep(struct ata_queued_cmd *qc);
1371extern void ata_sff_dev_select(struct ata_port *ap, unsigned int device);
1372extern u8 ata_sff_check_status(struct ata_port *ap);
1373extern u8 ata_sff_altstatus(struct ata_port *ap);
1374extern int ata_sff_busy_sleep(struct ata_port *ap,
1375 unsigned long timeout_pat, unsigned long timeout);
705e76be 1376extern int ata_sff_wait_ready(struct ata_link *link, unsigned long deadline);
9363c382
TH		 1377extern void ata_sff_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
1378extern void ata_sff_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
1379extern void ata_sff_exec_command(struct ata_port *ap,
1380 const struct ata_taskfile *tf);
1381extern unsigned int ata_sff_data_xfer(struct ata_device *dev,
624d5c51 1382 unsigned char *buf, unsigned int buflen, int rw);
9363c382 1383extern unsigned int ata_sff_data_xfer_noirq(struct ata_device *dev,
624d5c51 1384 unsigned char *buf, unsigned int buflen, int rw);
9363c382
TH		 1385extern u8 ata_sff_irq_on(struct ata_port *ap);
1386extern void ata_sff_irq_clear(struct ata_port *ap);
1387extern int ata_sff_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
1388 u8 status, int in_wq);
1389extern unsigned int ata_sff_qc_issue(struct ata_queued_cmd *qc);
1390extern unsigned int ata_sff_host_intr(struct ata_port *ap,
1391 struct ata_queued_cmd *qc);
1392extern irqreturn_t ata_sff_interrupt(int irq, void *dev_instance);
1393extern void ata_sff_freeze(struct ata_port *ap);
1394extern void ata_sff_thaw(struct ata_port *ap);
1395extern int ata_sff_prereset(struct ata_link *link, unsigned long deadline);
1396extern unsigned int ata_sff_dev_classify(struct ata_device *dev, int present,
1397 u8 *r_err);
705e76be
TH		 1398extern int ata_sff_wait_after_reset(struct ata_link *link, unsigned int devmask,
1399 unsigned long deadline);
9363c382 1400extern int ata_sff_softreset(struct ata_link *link, unsigned int *classes,
624d5c51 1401 unsigned long deadline);
9363c382
TH		 1402extern int sata_sff_hardreset(struct ata_link *link, unsigned int *class,
1403 unsigned long deadline);
1404extern void ata_sff_postreset(struct ata_link *link, unsigned int *classes);
1405extern void ata_sff_error_handler(struct ata_port *ap);
1406extern void ata_sff_post_internal_cmd(struct ata_queued_cmd *qc);
624d5c51 1407extern int ata_sff_port_start(struct ata_port *ap);
9363c382
TH		 1408extern void ata_sff_std_ports(struct ata_ioports *ioaddr);
1409extern unsigned long ata_bmdma_mode_filter(struct ata_device *dev,
1410 unsigned long xfer_mask);
624d5c51
TH		 1411extern void ata_bmdma_setup(struct ata_queued_cmd *qc);
1412extern void ata_bmdma_start(struct ata_queued_cmd *qc);
1413extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
1414extern u8 ata_bmdma_status(struct ata_port *ap);
1415extern void ata_bus_reset(struct ata_port *ap);
1416
1417#ifdef CONFIG_PCI
9363c382
TH		 1418extern int ata_pci_bmdma_clear_simplex(struct pci_dev *pdev);
1419extern int ata_pci_bmdma_init(struct ata_host *host);
1420extern int ata_pci_sff_init_host(struct ata_host *host);
1421extern int ata_pci_sff_prepare_host(struct pci_dev *pdev,
624d5c51
TH		 1422 const struct ata_port_info * const * ppi,
1423 struct ata_host **r_host);
9363c382 1424extern int ata_pci_sff_activate_host(struct ata_host *host,
624d5c51
TH		 1425 irq_handler_t irq_handler,
1426 struct scsi_host_template *sht);
9363c382
TH		 1427extern int ata_pci_sff_init_one(struct pci_dev *pdev,
1428 const struct ata_port_info * const * ppi,
1429 struct scsi_host_template *sht, void *host_priv);
624d5c51
TH		 1430#endif /* CONFIG_PCI */
1431
624d5c51 1432/**
9363c382 1433 * ata_sff_pause - Flush writes and pause 400 nanoseconds.
624d5c51
TH		 1434 * @ap: Port to wait for.
1435 *
1436 * LOCKING:
1437 * Inherited from caller.
1438 */
9363c382 1439static inline void ata_sff_pause(struct ata_port *ap)
624d5c51 1440{
9363c382 1441 ata_sff_altstatus(ap);
624d5c51
TH		 1442 ndelay(400);
1443}
1444
1445/**
9363c382 1446 * ata_sff_busy_wait - Wait for a port status register
624d5c51
TH		 1447 * @ap: Port to wait for.
1448 * @bits: bits that must be clear
1449 * @max: number of 10uS waits to perform
1450 *
1451 * Waits up to max*10 microseconds for the selected bits in the port's
1452 * status register to be cleared.
1453 * Returns final value of status register.
1454 *
1455 * LOCKING:
1456 * Inherited from caller.
1457 */
9363c382
TH		 1458static inline u8 ata_sff_busy_wait(struct ata_port *ap, unsigned int bits,
1459 unsigned int max)
624d5c51
TH		 1460{
1461 u8 status;
1462
1463 do {
1464 udelay(10);
5682ed33 1465 status = ap->ops->sff_check_status(ap);
624d5c51
TH		 1466 max--;
1467 } while (status != 0xff && (status & bits) && (max > 0));
1468
1469 return status;
1470}
1471
1472/**
1473 * ata_wait_idle - Wait for a port to be idle.
1474 * @ap: Port to wait for.
1475 *
1476 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
1477 * Returns final value of status register.
1478 *
1479 * LOCKING:
1480 * Inherited from caller.
1481 */
1482static inline u8 ata_wait_idle(struct ata_port *ap)
1483{
9363c382 1484 u8 status = ata_sff_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
624d5c51
TH		 1485
1486#ifdef ATA_DEBUG
1487 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ)))
1488 ata_port_printk(ap, KERN_DEBUG, "abnormal Status 0x%X\n",
1489 status);
1490#endif
1491
1492 return status;
1493}
1494
1da177e4 1495#endif /* __LINUX_LIBATA_H__ */
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