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libata: separate PMP support code from core code
[mirror_ubuntu-artful-kernel.git] / include / linux / libata.h
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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
127102ae 448#ifdef CONFIG_ATA_SFF
1da177e4 449struct ata_ioports {
0d5ff566
TH		 450 void __iomem *cmd_addr;
451 void __iomem *data_addr;
452 void __iomem *error_addr;
453 void __iomem *feature_addr;
454 void __iomem *nsect_addr;
455 void __iomem *lbal_addr;
456 void __iomem *lbam_addr;
457 void __iomem *lbah_addr;
458 void __iomem *device_addr;
459 void __iomem *status_addr;
460 void __iomem *command_addr;
461 void __iomem *altstatus_addr;
462 void __iomem *ctl_addr;
463 void __iomem *bmdma_addr;
464 void __iomem *scr_addr;
1da177e4 465};
127102ae 466#endif /* CONFIG_ATA_SFF */
1da177e4 467
cca3974e 468struct ata_host {
1da177e4
LT		 469 spinlock_t lock;
470 struct device *dev;
0d5ff566 471 void __iomem * const *iomap;
1da177e4
LT		 472 unsigned int n_ports;
473 void *private_data;
029cfd6b 474 struct ata_port_operations *ops;
5444a6f4 475 unsigned long flags;
fafbae87
TH		 476#ifdef CONFIG_ATA_ACPI
477 acpi_handle acpi_handle;
478#endif
032af1ce 479 struct ata_port *simplex_claimed; /* channel owning the DMA */
f0eb62b8 480 struct ata_port *ports[0];
1da177e4
LT		 481};
482
483struct ata_queued_cmd {
484 struct ata_port *ap;
485 struct ata_device *dev;
486
487 struct scsi_cmnd *scsicmd;
488 void (*scsidone)(struct scsi_cmnd *);
489
490 struct ata_taskfile tf;
491 u8 cdb[ATAPI_CDB_LEN];
492
493 unsigned long flags; /* ATA_QCFLAG_xxx */
494 unsigned int tag;
495 unsigned int n_elem;
496
497 int dma_dir;
498
5a5dbd18 499 unsigned int sect_size;
cedc9a47 500
1da177e4 501 unsigned int nbytes;
aacda375 502 unsigned int extrabytes;
1da177e4
LT		 503 unsigned int curbytes;
504
87260216 505 struct scatterlist *cursg;
1da177e4
LT		 506 unsigned int cursg_ofs;
507
508 struct scatterlist sgent;
1da177e4 509
ff2aeb1e 510 struct scatterlist *sg;
1da177e4 511
a22e2eb0 512 unsigned int err_mask;
e61e0672 513 struct ata_taskfile result_tf;
1da177e4
LT		 514 ata_qc_cb_t complete_fn;
515
1da177e4 516 void *private_data;
1c50dc83 517 void *lldd_task;
1da177e4
LT		 518};
519
cca3974e 520struct ata_port_stats {
1da177e4
LT		 521 unsigned long unhandled_irq;
522 unsigned long idle_irq;
523 unsigned long rw_reqbuf;
524};
525
0c247c55 526struct ata_ering_entry {
3884f7b0 527 unsigned int eflags;
0c247c55
TH		 528 unsigned int err_mask;
529 u64 timestamp;
530};
531
532struct ata_ering {
533 int cursor;
534 struct ata_ering_entry ring[ATA_ERING_SIZE];
535};
536
1da177e4 537struct ata_device {
9af5c9c9 538 struct ata_link *link;
72fa4b74 539 unsigned int devno; /* 0 or 1 */
1da177e4 540 unsigned long flags; /* ATA_DFLAG_xxx */
75683fe7 541 unsigned int horkage; /* List of broken features */
3edebac4 542 struct scsi_device *sdev; /* attached SCSI device */
fafbae87
TH		 543#ifdef CONFIG_ATA_ACPI
544 acpi_handle acpi_handle;
398e0782 545 union acpi_object *gtf_cache;
fafbae87 546#endif
72fa4b74
TH		 547 /* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */
548 u64 n_sectors; /* size of device, if ATA */
1da177e4 549 unsigned int class; /* ATA_DEV_xxx */
e0a71752
TH		 550
551 union {
552 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
553 u32 gscr[SATA_PMP_GSCR_DWORDS]; /* PMP GSCR block */
554 };
555
1da177e4
LT		 556 u8 pio_mode;
557 u8 dma_mode;
558 u8 xfer_mode;
559 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
560
8cbd6df1
AL		 561 unsigned int multi_count; /* sectors count for
562 READ/WRITE MULTIPLE */
b00eec1d 563 unsigned int max_sectors; /* per-device max sectors */
6e7846e9 564 unsigned int cdb_len;
8bf62ece 565
acf356b1 566 /* per-dev xfer mask */
7dc951ae
TH		 567 unsigned long pio_mask;
568 unsigned long mwdma_mask;
569 unsigned long udma_mask;
acf356b1 570
8bf62ece
AL		 571 /* for CHS addressing */
572 u16 cylinders; /* Number of cylinders */
573 u16 heads; /* Number of heads */
574 u16 sectors; /* Number of sectors per track */
0c247c55
TH		 575
576 /* error history */
577 struct ata_ering ering;
7d47e8d4 578 int spdn_cnt;
1da177e4
LT		 579};
580
72fa4b74
TH		 581/* Offset into struct ata_device. Fields above it are maintained
582 * acress device init. Fields below are zeroed.
583 */
584#define ATA_DEVICE_CLEAR_OFFSET offsetof(struct ata_device, n_sectors)
585
f3e81b19
TH		 586struct ata_eh_info {
587 struct ata_device *dev; /* offending device */
588 u32 serror; /* SError from LLDD */
589 unsigned int err_mask; /* port-wide err_mask */
590 unsigned int action; /* ATA_EH_* action mask */
47005f25 591 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */
f3e81b19 592 unsigned int flags; /* ATA_EHI_* flags */
abdda733 593
abdda733
TH		 594 unsigned int probe_mask;
595
f3e81b19
TH		 596 char desc[ATA_EH_DESC_LEN];
597 int desc_len;
598};
599
600struct ata_eh_context {
601 struct ata_eh_info i;
602 int tries[ATA_MAX_DEVICES];
abdda733
TH		 603 unsigned int classes[ATA_MAX_DEVICES];
604 unsigned int did_probe_mask;
00115e0f
TH		 605 unsigned int saved_ncq_enabled;
606 u8 saved_xfer_mode[ATA_MAX_DEVICES];
f3e81b19
TH		 607};
608
64578a3d
TH		 609struct ata_acpi_drive
610{
611 u32 pio;
612 u32 dma;
613} __packed;
614
615struct ata_acpi_gtm {
616 struct ata_acpi_drive drive[2];
617 u32 flags;
618} __packed;
619
9af5c9c9
TH		 620struct ata_link {
621 struct ata_port *ap;
8989805d 622 int pmp; /* port multiplier port # */
9af5c9c9
TH		 623
624 unsigned int active_tag; /* active tag on this link */
625 u32 sactive; /* active NCQ commands */
626
0c88758b
TH		 627 unsigned int flags; /* ATA_LFLAG_xxx */
628
9af5c9c9
TH		 629 unsigned int hw_sata_spd_limit;
630 unsigned int sata_spd_limit;
631 unsigned int sata_spd; /* current SATA PHY speed */
632
633 /* record runtime error info, protected by host_set lock */
634 struct ata_eh_info eh_info;
635 /* EH context */
636 struct ata_eh_context eh_context;
637
638 struct ata_device device[ATA_MAX_DEVICES];
639};
640
1da177e4 641struct ata_port {
cca3974e 642 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */
029cfd6b 643 struct ata_port_operations *ops;
ba6a1308 644 spinlock_t *lock;
1da177e4 645 unsigned long flags; /* ATA_FLAG_xxx */
b51e9e5d 646 unsigned int pflags; /* ATA_PFLAG_xxx */
44877b4e
TH		 647 unsigned int print_id; /* user visible unique port ID */
648 unsigned int port_no; /* 0 based port no. inside the host */
1da177e4
LT		 649
650 struct ata_prd *prd; /* our SG list */
651 dma_addr_t prd_dma; /* and its DMA mapping */
652
127102ae 653#ifdef CONFIG_ATA_SFF
1da177e4 654 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
127102ae 655#endif /* CONFIG_ATA_SFF */
1da177e4
LT		 656
657 u8 ctl; /* cache of ATA control register */
658 u8 last_ctl; /* Cache last written value */
1da177e4
LT		 659 unsigned int pio_mask;
660 unsigned int mwdma_mask;
661 unsigned int udma_mask;
662 unsigned int cbl; /* cable type; ATA_CBL_xxx */
1da177e4
LT		 663
664 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
6cec4a39 665 unsigned long qc_allocated;
dedaf2b0 666 unsigned int qc_active;
da917d69 667 int nr_active_links; /* #links with active qcs */
dedaf2b0 668
9af5c9c9 669 struct ata_link link; /* host default link */
1da177e4 670
8989805d
TH		 671 int nr_pmp_links; /* nr of available PMP links */
672 struct ata_link *pmp_link; /* array of PMP links */
da917d69 673 struct ata_link *excl_link; /* for PMP qc exclusion */
8989805d 674
cca3974e
JG		 675 struct ata_port_stats stats;
676 struct ata_host *host;
2f1f610b 677 struct device *dev;
1da177e4 678
65f27f38 679 void *port_task_data;
52bad64d
DH		 680 struct delayed_work port_task;
681 struct delayed_work hotplug_task;
3b01b8af 682 struct work_struct scsi_rescan_task;
86e45b6b 683
14be71f4 684 unsigned int hsm_task_state;
1da177e4 685
bfd60579 686 u32 msg_enable;
a72ec4ce 687 struct list_head eh_done_q;
c6cf9e99 688 wait_queue_head_t eh_wait_q;
a1e10f7e 689 int eh_tries;
bfd60579 690
500530f6
TH		 691 pm_message_t pm_mesg;
692 int *pm_result;
ca77329f 693 enum link_pm pm_policy;
500530f6 694
5ddf24c5
TH		 695 struct timer_list fastdrain_timer;
696 unsigned long fastdrain_cnt;
697
1da177e4 698 void *private_data;
fe635c7e 699
fafbae87
TH		 700#ifdef CONFIG_ATA_ACPI
701 acpi_handle acpi_handle;
c05e6ff0 702 struct ata_acpi_gtm __acpi_init_gtm; /* use ata_acpi_init_gtm() */
fafbae87 703#endif
fe635c7e 704 u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */
1da177e4
LT		 705};
706
029cfd6b
TH		 707/* The following initializer overrides a method to NULL whether one of
708 * its parent has the method defined or not. This is equivalent to
709 * ERR_PTR(-ENOENT). Unfortunately, ERR_PTR doesn't render a constant
710 * expression and thus can't be used as an initializer.
711 */
712#define ATA_OP_NULL (void *)(unsigned long)(-ENOENT)
713
1da177e4 714struct ata_port_operations {
c1bc899f
TH		 715 /*
716 * Command execution
717 */
718 int (*qc_defer)(struct ata_queued_cmd *qc);
719 int (*check_atapi_dma)(struct ata_queued_cmd *qc);
720 void (*qc_prep)(struct ata_queued_cmd *qc);
721 unsigned int (*qc_issue)(struct ata_queued_cmd *qc);
22183bf5 722 bool (*qc_fill_rtf)(struct ata_queued_cmd *qc);
1da177e4 723
c1bc899f
TH		 724 /*
725 * Configuration and exception handling
726 */
727 int (*cable_detect)(struct ata_port *ap);
728 unsigned long (*mode_filter)(struct ata_device *dev, unsigned long xfer_mask);
729 void (*set_piomode)(struct ata_port *ap, struct ata_device *dev);
730 void (*set_dmamode)(struct ata_port *ap, struct ata_device *dev);
731 int (*set_mode)(struct ata_link *link, struct ata_device **r_failed_dev);
1da177e4 732
c1bc899f 733 void (*dev_config)(struct ata_device *dev);
1da177e4 734
c1bc899f
TH		 735 void (*freeze)(struct ata_port *ap);
736 void (*thaw)(struct ata_port *ap);
a1efdaba
TH		 737 ata_prereset_fn_t prereset;
738 ata_reset_fn_t softreset;
739 ata_reset_fn_t hardreset;
740 ata_postreset_fn_t postreset;
741 ata_prereset_fn_t pmp_prereset;
742 ata_reset_fn_t pmp_softreset;
743 ata_reset_fn_t pmp_hardreset;
744 ata_postreset_fn_t pmp_postreset;
c1bc899f
TH		 745 void (*error_handler)(struct ata_port *ap);
746 void (*post_internal_cmd)(struct ata_queued_cmd *qc);
747
748 /*
749 * Optional features
750 */
751 int (*scr_read)(struct ata_port *ap, unsigned int sc_reg, u32 *val);
752 int (*scr_write)(struct ata_port *ap, unsigned int sc_reg, u32 val);
753 void (*pmp_attach)(struct ata_port *ap);
754 void (*pmp_detach)(struct ata_port *ap);
755 int (*enable_pm)(struct ata_port *ap, enum link_pm policy);
756 void (*disable_pm)(struct ata_port *ap);
757
758 /*
759 * Start, stop, suspend and resume
760 */
761 int (*port_suspend)(struct ata_port *ap, pm_message_t mesg);
762 int (*port_resume)(struct ata_port *ap);
763 int (*port_start)(struct ata_port *ap);
764 void (*port_stop)(struct ata_port *ap);
765 void (*host_stop)(struct ata_host *host);
766
127102ae 767#ifdef CONFIG_ATA_SFF
c1bc899f
TH		 768 /*
769 * SFF / taskfile oriented ops
770 */
5682ed33
TH		 771 void (*sff_dev_select)(struct ata_port *ap, unsigned int device);
772 u8 (*sff_check_status)(struct ata_port *ap);
773 u8 (*sff_check_altstatus)(struct ata_port *ap);
774 void (*sff_tf_load)(struct ata_port *ap, const struct ata_taskfile *tf);
775 void (*sff_tf_read)(struct ata_port *ap, struct ata_taskfile *tf);
776 void (*sff_exec_command)(struct ata_port *ap,
777 const struct ata_taskfile *tf);
778 unsigned int (*sff_data_xfer)(struct ata_device *dev,
779 unsigned char *buf, unsigned int buflen, int rw);
780 u8 (*sff_irq_on)(struct ata_port *);
781 void (*sff_irq_clear)(struct ata_port *);
782
c1bc899f
TH		 783 void (*bmdma_setup)(struct ata_queued_cmd *qc);
784 void (*bmdma_start)(struct ata_queued_cmd *qc);
785 void (*bmdma_stop)(struct ata_queued_cmd *qc);
786 u8 (*bmdma_status)(struct ata_port *ap);
127102ae 787#endif /* CONFIG_ATA_SFF */
c1bc899f
TH		 788
789 /*
790 * Obsolete
9ec957f2 791 */
c1bc899f
TH		 792 void (*phy_reset)(struct ata_port *ap);
793 void (*eng_timeout)(struct ata_port *ap);
029cfd6b
TH		 794
795 /*
796 * ->inherits must be the last field and all the preceding
797 * fields must be pointers.
798 */
799 const struct ata_port_operations *inherits;
1da177e4
LT		 800};
801
802struct ata_port_info {
cca3974e 803 unsigned long flags;
0c88758b 804 unsigned long link_flags;
1da177e4
LT		 805 unsigned long pio_mask;
806 unsigned long mwdma_mask;
807 unsigned long udma_mask;
029cfd6b 808 struct ata_port_operations *port_ops;
e99f8b5e 809 void *private_data;
1da177e4
LT		 810};
811
452503f9
AC		 812struct ata_timing {
813 unsigned short mode; /* ATA mode */
814 unsigned short setup; /* t1 */
815 unsigned short act8b; /* t2 for 8-bit I/O */
816 unsigned short rec8b; /* t2i for 8-bit I/O */
817 unsigned short cyc8b; /* t0 for 8-bit I/O */
818 unsigned short active; /* t2 or tD */
819 unsigned short recover; /* t2i or tK */
820 unsigned short cycle; /* t0 */
821 unsigned short udma; /* t2CYCTYP/2 */
822};
823
2dcb407e 824#define FIT(v, vmin, vmax) max_t(short, min_t(short, v, vmax), vmin)
1da177e4 825
624d5c51
TH		 826/*
827 * Core layer - drivers/ata/libata-core.c
828 */
e9c83914
TH		 829extern const unsigned long sata_deb_timing_normal[];
830extern const unsigned long sata_deb_timing_hotplug[];
831extern const unsigned long sata_deb_timing_long[];
832
029cfd6b 833extern struct ata_port_operations ata_dummy_port_ops;
21b0ad4f 834extern const struct ata_port_info ata_dummy_port_info;
dd5b06c4 835
e9c83914
TH		 836static inline const unsigned long *
837sata_ehc_deb_timing(struct ata_eh_context *ehc)
838{
839 if (ehc->i.flags & ATA_EHI_HOTPLUGGED)
840 return sata_deb_timing_hotplug;
841 else
842 return sata_deb_timing_normal;
843}
d7bb4cc7 844
dd5b06c4
TH		 845static inline int ata_port_is_dummy(struct ata_port *ap)
846{
847 return ap->ops == &ata_dummy_port_ops;
848}
849
936fd732 850extern void sata_print_link_status(struct ata_link *link);
1da177e4 851extern void ata_port_probe(struct ata_port *);
936fd732 852extern int sata_set_spd(struct ata_link *link);
0aa1113d 853extern int ata_std_prereset(struct ata_link *link, unsigned long deadline);
aa2731ad
TH		 854extern int ata_wait_after_reset(struct ata_link *link, unsigned long deadline,
855 int (*check_ready)(struct ata_link *link));
936fd732
TH		 856extern int sata_link_debounce(struct ata_link *link,
857 const unsigned long *params, unsigned long deadline);
858extern int sata_link_resume(struct ata_link *link, const unsigned long *params,
859 unsigned long deadline);
cc0680a5 860extern int sata_link_hardreset(struct ata_link *link,
9dadd45b
TH		 861 const unsigned long *timing, unsigned long deadline,
862 bool *online, int (*check_ready)(struct ata_link *));
57c9efdf
TH		 863extern int sata_std_hardreset(struct ata_link *link, unsigned int *class,
864 unsigned long deadline);
203c75b8 865extern void ata_std_postreset(struct ata_link *link, unsigned int *classes);
1da177e4 866extern void ata_port_disable(struct ata_port *);
2855568b 867
f3187195 868extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports);
f5cda257
TH		 869extern struct ata_host *ata_host_alloc_pinfo(struct device *dev,
870 const struct ata_port_info * const * ppi, int n_ports);
ecef7253 871extern int ata_host_start(struct ata_host *host);
f3187195
TH		 872extern int ata_host_register(struct ata_host *host,
873 struct scsi_host_template *sht);
f5cda257
TH		 874extern int ata_host_activate(struct ata_host *host, int irq,
875 irq_handler_t irq_handler, unsigned long irq_flags,
876 struct scsi_host_template *sht);
0529c159 877extern void ata_host_detach(struct ata_host *host);
cca3974e 878extern void ata_host_init(struct ata_host *, struct device *,
029cfd6b 879 unsigned long, struct ata_port_operations *);
193515d5 880extern int ata_scsi_detect(struct scsi_host_template *sht);
1da177e4
LT		 881extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
882extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *));
80289167 883extern void ata_sas_port_destroy(struct ata_port *);
cca3974e 884extern struct ata_port *ata_sas_port_alloc(struct ata_host *,
80289167
BK		 885 struct ata_port_info *, struct Scsi_Host *);
886extern int ata_sas_port_init(struct ata_port *);
887extern int ata_sas_port_start(struct ata_port *ap);
888extern void ata_sas_port_stop(struct ata_port *ap);
889extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *);
890extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
891 struct ata_port *ap);
936fd732
TH		 892extern int sata_scr_valid(struct ata_link *link);
893extern int sata_scr_read(struct ata_link *link, int reg, u32 *val);
894extern int sata_scr_write(struct ata_link *link, int reg, u32 val);
895extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val);
896extern int ata_link_online(struct ata_link *link);
897extern int ata_link_offline(struct ata_link *link);
6ffa01d8 898#ifdef CONFIG_PM
cca3974e
JG		 899extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg);
900extern void ata_host_resume(struct ata_host *host);
6ffa01d8 901#endif
67846b30 902extern int ata_ratelimit(void);
c22daff4
TH		 903extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
904 unsigned long interval_msec,
905 unsigned long timeout_msec);
436d34b3 906extern int atapi_cmd_type(u8 opcode);
9977126c
TH		 907extern void ata_tf_to_fis(const struct ata_taskfile *tf,
908 u8 pmp, int is_cmd, u8 *fis);
057ace5e 909extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
7dc951ae
TH		 910extern unsigned long ata_pack_xfermask(unsigned long pio_mask,
911 unsigned long mwdma_mask, unsigned long udma_mask);
912extern void ata_unpack_xfermask(unsigned long xfer_mask,
913 unsigned long *pio_mask, unsigned long *mwdma_mask,
914 unsigned long *udma_mask);
915extern u8 ata_xfer_mask2mode(unsigned long xfer_mask);
916extern unsigned long ata_xfer_mode2mask(u8 xfer_mode);
917extern int ata_xfer_mode2shift(unsigned long xfer_mode);
918extern const char *ata_mode_string(unsigned long xfer_mask);
919extern unsigned long ata_id_xfermask(const u16 *id);
2dcb407e 920extern int ata_port_start(struct ata_port *ap);
31cc23b3 921extern int ata_std_qc_defer(struct ata_queued_cmd *qc);
e46834cd 922extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
1da177e4
LT		 923extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
924 unsigned int n_elem);
057ace5e 925extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
10305f0f 926extern void ata_dev_disable(struct ata_device *adev);
6a62a04d
TH		 927extern void ata_id_string(const u16 *id, unsigned char *s,
928 unsigned int ofs, unsigned int len);
929extern void ata_id_c_string(const u16 *id, unsigned char *s,
930 unsigned int ofs, unsigned int len);
f686bcb8 931extern void ata_qc_complete(struct ata_queued_cmd *qc);
79f97dad 932extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active);
3373efd8 933extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
1da177e4
LT		 934 void (*done)(struct scsi_cmnd *));
935extern int ata_std_bios_param(struct scsi_device *sdev,
936 struct block_device *bdev,
937 sector_t capacity, int geom[]);
938extern int ata_scsi_slave_config(struct scsi_device *sdev);
83c47bcb 939extern void ata_scsi_slave_destroy(struct scsi_device *sdev);
a6e6ce8e
TH		 940extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
941 int queue_depth);
3373efd8 942extern struct ata_device *ata_dev_pair(struct ata_device *adev);
0260731f 943extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev);
1da177e4 944
be0d18df
AC		 945extern int ata_cable_40wire(struct ata_port *ap);
946extern int ata_cable_80wire(struct ata_port *ap);
947extern int ata_cable_sata(struct ata_port *ap);
c88f90c3 948extern int ata_cable_ignore(struct ata_port *ap);
be0d18df
AC		 949extern int ata_cable_unknown(struct ata_port *ap);
950
624d5c51 951/* Timing helpers */
1bc4ccff 952extern unsigned int ata_pio_need_iordy(const struct ata_device *);
6357357c 953extern const struct ata_timing *ata_timing_find_mode(u8 xfer_mode);
452503f9
AC		 954extern int ata_timing_compute(struct ata_device *, unsigned short,
955 struct ata_timing *, int, int);
956extern void ata_timing_merge(const struct ata_timing *,
957 const struct ata_timing *, struct ata_timing *,
958 unsigned int);
a0f79b92 959extern u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle);
452503f9 960
624d5c51
TH		 961/* PCI */
962#ifdef CONFIG_PCI
963struct pci_dev;
964
965struct pci_bits {
966 unsigned int reg; /* PCI config register to read */
967 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
968 unsigned long mask;
969 unsigned long val;
452503f9
AC		 970};
971
624d5c51
TH		 972extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
973extern void ata_pci_remove_one(struct pci_dev *pdev);
974
975#ifdef CONFIG_PM
976extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg);
977extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev);
978extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
979extern int ata_pci_device_resume(struct pci_dev *pdev);
980#endif /* CONFIG_PM */
981#endif /* CONFIG_PCI */
982
983/*
984 * ACPI - drivers/ata/libata-acpi.c
985 */
e1ddb4b6 986#ifdef CONFIG_ATA_ACPI
c05e6ff0
TH		 987static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
988{
989 if (ap->pflags & ATA_PFLAG_INIT_GTM_VALID)
990 return &ap->__acpi_init_gtm;
991 return NULL;
992}
0d02f0b2
TH		 993int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm);
994int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *stm);
7c77fa4d
TH		 995unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev,
996 const struct ata_acpi_gtm *gtm);
021ee9a6 997int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm);
e1ddb4b6 998#else
c05e6ff0
TH		 999static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
1000{
1001 return NULL;
1002}
7c77fa4d
TH		 1003
1004static inline int ata_acpi_stm(const struct ata_port *ap,
1005 struct ata_acpi_gtm *stm)
1006{
1007 return -ENOSYS;
1008}
1009
1010static inline int ata_acpi_gtm(const struct ata_port *ap,
1011 struct ata_acpi_gtm *stm)
1012{
1013 return -ENOSYS;
1014}
1015
1016static inline unsigned int ata_acpi_gtm_xfermask(struct ata_device *dev,
1017 const struct ata_acpi_gtm *gtm)
1018{
1019 return 0;
1020}
021ee9a6
TH		 1021
1022static inline int ata_acpi_cbl_80wire(struct ata_port *ap,
1023 const struct ata_acpi_gtm *gtm)
1024{
1025 return 0;
1026}
e1ddb4b6 1027#endif
1da177e4 1028
ece1d636 1029/*
624d5c51 1030 * EH - drivers/ata/libata-eh.c
ece1d636 1031 */
7b70fc03 1032extern void ata_port_schedule_eh(struct ata_port *ap);
dbd82616 1033extern int ata_link_abort(struct ata_link *link);
7b70fc03 1034extern int ata_port_abort(struct ata_port *ap);
e3180499 1035extern int ata_port_freeze(struct ata_port *ap);
7d77b247 1036extern int sata_async_notification(struct ata_port *ap);
e3180499
TH		 1037
1038extern void ata_eh_freeze_port(struct ata_port *ap);
1039extern void ata_eh_thaw_port(struct ata_port *ap);
7b70fc03 1040
ece1d636
TH		 1041extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
1042extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
1043
f5914a46
TH		 1044extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
1045 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
1046 ata_postreset_fn_t postreset);
a1efdaba 1047extern void ata_std_error_handler(struct ata_port *ap);
022bdb07 1048
68d1d07b
TH		 1049/*
1050 * Base operations to inherit from and initializers for sht
1051 *
1052 * Operations
1053 *
1054 * base : Common to all libata drivers.
1055 * sata : SATA controllers w/ native interface.
1056 * pmp : SATA controllers w/ PMP support.
1057 * sff : SFF ATA controllers w/o BMDMA support.
1058 * bmdma : SFF ATA controllers w/ BMDMA support.
1059 *
1060 * sht initializers
1061 *
1062 * BASE : Common to all libata drivers. The user must set
1063 * sg_tablesize and dma_boundary.
1064 * PIO : SFF ATA controllers w/ only PIO support.
1065 * BMDMA : SFF ATA controllers w/ BMDMA support. sg_tablesize and
1066 * dma_boundary are set to BMDMA limits.
1067 * NCQ : SATA controllers supporting NCQ. The user must set
1068 * sg_tablesize, dma_boundary and can_queue.
1069 */
1070extern const struct ata_port_operations ata_base_port_ops;
1071extern const struct ata_port_operations sata_port_ops;
68d1d07b
TH		 1072
1073#define ATA_BASE_SHT(drv_name) \
1074 .module = THIS_MODULE, \
1075 .name = drv_name, \
1076 .ioctl = ata_scsi_ioctl, \
1077 .queuecommand = ata_scsi_queuecmd, \
1078 .can_queue = ATA_DEF_QUEUE, \
1079 .this_id = ATA_SHT_THIS_ID, \
1080 .cmd_per_lun = ATA_SHT_CMD_PER_LUN, \
1081 .emulated = ATA_SHT_EMULATED, \
1082 .use_clustering = ATA_SHT_USE_CLUSTERING, \
1083 .proc_name = drv_name, \
1084 .slave_configure = ata_scsi_slave_config, \
1085 .slave_destroy = ata_scsi_slave_destroy, \
1086 .bios_param = ata_std_bios_param
1087
68d1d07b
TH		 1088#define ATA_NCQ_SHT(drv_name) \
1089 ATA_BASE_SHT(drv_name), \
1090 .change_queue_depth = ata_scsi_change_queue_depth
1091
61440db6
TH		 1092/*
1093 * printk helpers
1094 */
1095#define ata_port_printk(ap, lv, fmt, args...) \
c2e366a1 1096 printk("%sata%u: "fmt, lv, (ap)->print_id , ##args)
61440db6 1097
8989805d
TH		 1098#define ata_link_printk(link, lv, fmt, args...) do { \
1099 if ((link)->ap->nr_pmp_links) \
c2e366a1 1100 printk("%sata%u.%02u: "fmt, lv, (link)->ap->print_id, \
8989805d
TH		 1101 (link)->pmp , ##args); \
1102 else \
c2e366a1 1103 printk("%sata%u: "fmt, lv, (link)->ap->print_id , ##args); \
8989805d 1104 } while(0)
9af5c9c9 1105
61440db6 1106#define ata_dev_printk(dev, lv, fmt, args...) \
c2e366a1 1107 printk("%sata%u.%02u: "fmt, lv, (dev)->link->ap->print_id, \
8989805d 1108 (dev)->link->pmp + (dev)->devno , ##args)
1da177e4 1109
f3e81b19
TH		 1110/*
1111 * ata_eh_info helpers
1112 */
cb94c1cf
TH		 1113extern void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...)
1114 __attribute__ ((format (printf, 2, 3)));
1115extern void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...)
1116 __attribute__ ((format (printf, 2, 3)));
b64bbc39 1117extern void ata_ehi_clear_desc(struct ata_eh_info *ehi);
f3e81b19 1118
c0b6c037
TH		 1119static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
1120{
b558eddd 1121 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
f8f1e1cc 1122 ehi->flags |= ATA_EHI_HOTPLUGGED;
b558eddd 1123 ehi->action |= ATA_EH_RESET | ATA_EH_ENABLE_LINK;
c0b6c037
TH		 1124 ehi->err_mask |= AC_ERR_ATA_BUS;
1125}
1126
cbcdd875
TH		 1127/*
1128 * port description helpers
1129 */
1130extern void ata_port_desc(struct ata_port *ap, const char *fmt, ...)
1131 __attribute__ ((format (printf, 2, 3)));
1132#ifdef CONFIG_PCI
1133extern void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset,
1134 const char *name);
1135#endif
1136
1da177e4
LT		 1137static inline unsigned int ata_tag_valid(unsigned int tag)
1138{
1139 return (tag < ATA_MAX_QUEUE) ? 1 : 0;
1140}
1141
2ab7db1f
TH		 1142static inline unsigned int ata_tag_internal(unsigned int tag)
1143{
83c063dd 1144 return tag == ATA_TAG_INTERNAL;
2ab7db1f
TH		 1145}
1146
5806db22
TH		 1147/*
1148 * device helpers
1149 */
e1211e3f 1150static inline unsigned int ata_class_enabled(unsigned int class)
597afd21 1151{
e0a71752
TH		 1152 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI ||
1153 class == ATA_DEV_PMP || class == ATA_DEV_SEMB;
597afd21
TH		 1154}
1155
e1211e3f 1156static inline unsigned int ata_class_disabled(unsigned int class)
1da177e4 1157{
e0a71752
TH		 1158 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP ||
1159 class == ATA_DEV_PMP_UNSUP || class == ATA_DEV_SEMB_UNSUP;
e1211e3f
TH		 1160}
1161
002c8054
TH		 1162static inline unsigned int ata_class_absent(unsigned int class)
1163{
1164 return !ata_class_enabled(class) && !ata_class_disabled(class);
1165}
1166
e1211e3f
TH		 1167static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
1168{
1169 return ata_class_enabled(dev->class);
1170}
1171
1172static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
1173{
1174 return ata_class_disabled(dev->class);
1da177e4
LT		 1175}
1176
002c8054
TH		 1177static inline unsigned int ata_dev_absent(const struct ata_device *dev)
1178{
1179 return ata_class_absent(dev->class);
1180}
1181
5806db22 1182/*
f58229f8 1183 * link helpers
5806db22 1184 */
8989805d
TH		 1185static inline int ata_is_host_link(const struct ata_link *link)
1186{
1187 return link == &link->ap->link;
1188}
1189
f58229f8 1190static inline int ata_link_max_devices(const struct ata_link *link)
5806db22 1191{
8989805d 1192 if (ata_is_host_link(link) && link->ap->flags & ATA_FLAG_SLAVE_POSS)
5806db22
TH		 1193 return 2;
1194 return 1;
1195}
1196
da917d69
TH		 1197static inline int ata_link_active(struct ata_link *link)
1198{
1199 return ata_tag_valid(link->active_tag) || link->sactive;
1200}
1201
8989805d
TH		 1202static inline struct ata_link *ata_port_first_link(struct ata_port *ap)
1203{
1204 if (ap->nr_pmp_links)
1205 return ap->pmp_link;
1206 return &ap->link;
1207}
1208
1209static inline struct ata_link *ata_port_next_link(struct ata_link *link)
1210{
1211 struct ata_port *ap = link->ap;
1212
1213 if (link == &ap->link) {
1214 if (!ap->nr_pmp_links)
1215 return NULL;
1216 return ap->pmp_link;
1217 }
1218
5d44b414 1219 if (++link < ap->nr_pmp_links + ap->pmp_link)
8989805d
TH		 1220 return link;
1221 return NULL;
1222}
1223
1224#define __ata_port_for_each_link(lk, ap) \
1225 for ((lk) = &(ap)->link; (lk); (lk) = ata_port_next_link(lk))
1226
1227#define ata_port_for_each_link(link, ap) \
1228 for ((link) = ata_port_first_link(ap); (link); \
1229 (link) = ata_port_next_link(link))
f58229f8
TH		 1230
1231#define ata_link_for_each_dev(dev, link) \
1232 for ((dev) = (link)->device; \
1233 (dev) < (link)->device + ata_link_max_devices(link) || ((dev) = NULL); \
1234 (dev)++)
1235
1236#define ata_link_for_each_dev_reverse(dev, link) \
1237 for ((dev) = (link)->device + ata_link_max_devices(link) - 1; \
1238 (dev) >= (link)->device || ((dev) = NULL); (dev)--)
5806db22 1239
6d1245bf
TH		 1240/**
1241 * ata_ncq_enabled - Test whether NCQ is enabled
1242 * @dev: ATA device to test for
1243 *
1244 * LOCKING:
1245 * spin_lock_irqsave(host lock)
1246 *
1247 * RETURNS:
1248 * 1 if NCQ is enabled for @dev, 0 otherwise.
1249 */
1250static inline int ata_ncq_enabled(struct ata_device *dev)
1251{
1252 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF |
1253 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ;
1254}
0baab86b 1255
1da177e4
LT		 1256static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
1257{
1258 qc->tf.ctl |= ATA_NIEN;
1259}
1260
f69499f4
TH		 1261static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap,
1262 unsigned int tag)
1da177e4
LT		 1263{
1264 if (likely(ata_tag_valid(tag)))
1265 return &ap->qcmd[tag];
1266 return NULL;
1267}
1268
f69499f4
TH		 1269static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap,
1270 unsigned int tag)
1271{
1272 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
1273
1274 if (unlikely(!qc) || !ap->ops->error_handler)
1275 return qc;
1276
1277 if ((qc->flags & (ATA_QCFLAG_ACTIVE |
1278 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE)
1279 return qc;
1280
1281 return NULL;
1282}
1283
aacda375
TH		 1284static inline unsigned int ata_qc_raw_nbytes(struct ata_queued_cmd *qc)
1285{
1286 return qc->nbytes - min(qc->extrabytes, qc->nbytes);
1287}
1288
3373efd8 1289static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
1da177e4
LT		 1290{
1291 memset(tf, 0, sizeof(*tf));
1292
9af5c9c9 1293 tf->ctl = dev->link->ap->ctl;
3373efd8 1294 if (dev->devno == 0)
1da177e4
LT		 1295 tf->device = ATA_DEVICE_OBS;
1296 else
1297 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
1298}
1299
2c13b7ce
JG		 1300static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
1301{
501e0c50 1302 qc->dma_dir = DMA_NONE;
ff2aeb1e 1303 qc->sg = NULL;
2c13b7ce 1304 qc->flags = 0;
87260216
JA		 1305 qc->cursg = NULL;
1306 qc->cursg_ofs = 0;
aacda375 1307 qc->nbytes = qc->extrabytes = qc->curbytes = 0;
7a801184 1308 qc->n_elem = 0;
a22e2eb0 1309 qc->err_mask = 0;
5a5dbd18 1310 qc->sect_size = ATA_SECT_SIZE;
2c13b7ce 1311
3373efd8 1312 ata_tf_init(qc->dev, &qc->tf);
e61e0672
TH		 1313
1314 /* init result_tf such that it indicates normal completion */
1315 qc->result_tf.command = ATA_DRDY;
1316 qc->result_tf.feature = 0;
2c13b7ce
JG		 1317}
1318
057ace5e 1319static inline int ata_try_flush_cache(const struct ata_device *dev)
1da177e4
LT		 1320{
1321 return ata_id_wcache_enabled(dev->id) ||
1322 ata_id_has_flush(dev->id) ||
1323 ata_id_has_flush_ext(dev->id);
1324}
1325
a7dac447
JG		 1326static inline unsigned int ac_err_mask(u8 status)
1327{
3655d1d3 1328 if (status & (ATA_BUSY | ATA_DRQ))
11a56d24 1329 return AC_ERR_HSM;
a7dac447
JG		 1330 if (status & (ATA_ERR | ATA_DF))
1331 return AC_ERR_DEV;
1332 return 0;
1333}
1334
1335static inline unsigned int __ac_err_mask(u8 status)
1336{
1337 unsigned int mask = ac_err_mask(status);
1338 if (mask == 0)
1339 return AC_ERR_OTHER;
1340 return mask;
1341}
1342
35bb94b1
JG		 1343static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
1344{
4911487a 1345 return *(struct ata_port **)&host->hostdata[0];
35bb94b1
JG		 1346}
1347
48515f6c
TH		 1348
1349/**************************************************************************
1350 * PMP - drivers/ata/libata-pmp.c
1351 */
1352extern const struct ata_port_operations sata_pmp_port_ops;
1353
1354extern int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc);
1355extern void sata_pmp_error_handler(struct ata_port *ap);
1356
1357
624d5c51
TH		 1358/**************************************************************************
1359 * SFF - drivers/ata/libata-sff.c
1360 */
127102ae
TH		 1361#ifdef CONFIG_ATA_SFF
1362
624d5c51
TH		 1363extern const struct ata_port_operations ata_sff_port_ops;
1364extern const struct ata_port_operations ata_bmdma_port_ops;
1365
1366/* PIO only, sg_tablesize and dma_boundary limits can be removed */
1367#define ATA_PIO_SHT(drv_name) \
1368 ATA_BASE_SHT(drv_name), \
1369 .sg_tablesize = LIBATA_MAX_PRD, \
1370 .dma_boundary = ATA_DMA_BOUNDARY
1371
1372#define ATA_BMDMA_SHT(drv_name) \
1373 ATA_BASE_SHT(drv_name), \
1374 .sg_tablesize = LIBATA_MAX_PRD, \
1375 .dma_boundary = ATA_DMA_BOUNDARY
1376
9363c382
TH		 1377extern void ata_sff_qc_prep(struct ata_queued_cmd *qc);
1378extern void ata_sff_dumb_qc_prep(struct ata_queued_cmd *qc);
1379extern void ata_sff_dev_select(struct ata_port *ap, unsigned int device);
1380extern u8 ata_sff_check_status(struct ata_port *ap);
1381extern u8 ata_sff_altstatus(struct ata_port *ap);
1382extern int ata_sff_busy_sleep(struct ata_port *ap,
1383 unsigned long timeout_pat, unsigned long timeout);
705e76be 1384extern int ata_sff_wait_ready(struct ata_link *link, unsigned long deadline);
9363c382
TH		 1385extern void ata_sff_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
1386extern void ata_sff_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
1387extern void ata_sff_exec_command(struct ata_port *ap,
1388 const struct ata_taskfile *tf);
1389extern unsigned int ata_sff_data_xfer(struct ata_device *dev,
624d5c51 1390 unsigned char *buf, unsigned int buflen, int rw);
9363c382 1391extern unsigned int ata_sff_data_xfer_noirq(struct ata_device *dev,
624d5c51 1392 unsigned char *buf, unsigned int buflen, int rw);
9363c382
TH		 1393extern u8 ata_sff_irq_on(struct ata_port *ap);
1394extern void ata_sff_irq_clear(struct ata_port *ap);
1395extern int ata_sff_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
1396 u8 status, int in_wq);
1397extern unsigned int ata_sff_qc_issue(struct ata_queued_cmd *qc);
22183bf5 1398extern bool ata_sff_qc_fill_rtf(struct ata_queued_cmd *qc);
9363c382
TH		 1399extern unsigned int ata_sff_host_intr(struct ata_port *ap,
1400 struct ata_queued_cmd *qc);
1401extern irqreturn_t ata_sff_interrupt(int irq, void *dev_instance);
1402extern void ata_sff_freeze(struct ata_port *ap);
1403extern void ata_sff_thaw(struct ata_port *ap);
1404extern int ata_sff_prereset(struct ata_link *link, unsigned long deadline);
1405extern unsigned int ata_sff_dev_classify(struct ata_device *dev, int present,
1406 u8 *r_err);
705e76be
TH		 1407extern int ata_sff_wait_after_reset(struct ata_link *link, unsigned int devmask,
1408 unsigned long deadline);
9363c382 1409extern int ata_sff_softreset(struct ata_link *link, unsigned int *classes,
624d5c51 1410 unsigned long deadline);
9363c382
TH		 1411extern int sata_sff_hardreset(struct ata_link *link, unsigned int *class,
1412 unsigned long deadline);
1413extern void ata_sff_postreset(struct ata_link *link, unsigned int *classes);
1414extern void ata_sff_error_handler(struct ata_port *ap);
1415extern void ata_sff_post_internal_cmd(struct ata_queued_cmd *qc);
624d5c51 1416extern int ata_sff_port_start(struct ata_port *ap);
9363c382
TH		 1417extern void ata_sff_std_ports(struct ata_ioports *ioaddr);
1418extern unsigned long ata_bmdma_mode_filter(struct ata_device *dev,
1419 unsigned long xfer_mask);
624d5c51
TH		 1420extern void ata_bmdma_setup(struct ata_queued_cmd *qc);
1421extern void ata_bmdma_start(struct ata_queued_cmd *qc);
1422extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
1423extern u8 ata_bmdma_status(struct ata_port *ap);
1424extern void ata_bus_reset(struct ata_port *ap);
1425
1426#ifdef CONFIG_PCI
9363c382
TH		 1427extern int ata_pci_bmdma_clear_simplex(struct pci_dev *pdev);
1428extern int ata_pci_bmdma_init(struct ata_host *host);
1429extern int ata_pci_sff_init_host(struct ata_host *host);
1430extern int ata_pci_sff_prepare_host(struct pci_dev *pdev,
624d5c51
TH		 1431 const struct ata_port_info * const * ppi,
1432 struct ata_host **r_host);
9363c382 1433extern int ata_pci_sff_activate_host(struct ata_host *host,
624d5c51
TH		 1434 irq_handler_t irq_handler,
1435 struct scsi_host_template *sht);
9363c382
TH		 1436extern int ata_pci_sff_init_one(struct pci_dev *pdev,
1437 const struct ata_port_info * const * ppi,
1438 struct scsi_host_template *sht, void *host_priv);
624d5c51
TH		 1439#endif /* CONFIG_PCI */
1440
624d5c51 1441/**
9363c382 1442 * ata_sff_pause - Flush writes and pause 400 nanoseconds.
624d5c51
TH		 1443 * @ap: Port to wait for.
1444 *
1445 * LOCKING:
1446 * Inherited from caller.
1447 */
9363c382 1448static inline void ata_sff_pause(struct ata_port *ap)
624d5c51 1449{
9363c382 1450 ata_sff_altstatus(ap);
624d5c51
TH		 1451 ndelay(400);
1452}
1453
1454/**
9363c382 1455 * ata_sff_busy_wait - Wait for a port status register
624d5c51
TH		 1456 * @ap: Port to wait for.
1457 * @bits: bits that must be clear
1458 * @max: number of 10uS waits to perform
1459 *
1460 * Waits up to max*10 microseconds for the selected bits in the port's
1461 * status register to be cleared.
1462 * Returns final value of status register.
1463 *
1464 * LOCKING:
1465 * Inherited from caller.
1466 */
9363c382
TH		 1467static inline u8 ata_sff_busy_wait(struct ata_port *ap, unsigned int bits,
1468 unsigned int max)
624d5c51
TH		 1469{
1470 u8 status;
1471
1472 do {
1473 udelay(10);
5682ed33 1474 status = ap->ops->sff_check_status(ap);
624d5c51
TH		 1475 max--;
1476 } while (status != 0xff && (status & bits) && (max > 0));
1477
1478 return status;
1479}
1480
1481/**
1482 * ata_wait_idle - Wait for a port to be idle.
1483 * @ap: Port to wait for.
1484 *
1485 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
1486 * Returns final value of status register.
1487 *
1488 * LOCKING:
1489 * Inherited from caller.
1490 */
1491static inline u8 ata_wait_idle(struct ata_port *ap)
1492{
9363c382 1493 u8 status = ata_sff_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
624d5c51
TH		 1494
1495#ifdef ATA_DEBUG
1496 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ)))
1497 ata_port_printk(ap, KERN_DEBUG, "abnormal Status 0x%X\n",
1498 status);
1499#endif
1500
1501 return status;
1502}
127102ae 1503#endif /* CONFIG_ATA_SFF */
624d5c51 1504
1da177e4 1505#endif /* __LINUX_LIBATA_H__ */
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