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libata: clean up port_ops->sff_irq_clear()
[GitHub/mt8127/android_kernel_alcatel_ttab.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
1da177e4
LT		 252 /* ATA bus states */
253 BUS_UNKNOWN = 0,
254 BUS_DMA = 1,
255 BUS_IDLE = 2,
256 BUS_NOINTR = 3,
257 BUS_NODATA = 4,
258 BUS_TIMER = 5,
259 BUS_PIO = 6,
260 BUS_EDD = 7,
261 BUS_IDENTIFY = 8,
262 BUS_PACKET = 9,
263
264 /* SATA port states */
265 PORT_UNKNOWN = 0,
266 PORT_ENABLED = 1,
267 PORT_DISABLED = 2,
268
269 /* encoding various smaller bitmaps into a single
7dc951ae 270 * unsigned long bitmap
1da177e4 271 */
70cd071e
TH		 272 ATA_NR_PIO_MODES = 7,
273 ATA_NR_MWDMA_MODES = 5,
274 ATA_NR_UDMA_MODES = 8,
1da7b0d0
TH		 275
276 ATA_SHIFT_PIO = 0,
70cd071e
TH		 277 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_NR_PIO_MODES,
278 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_NR_MWDMA_MODES,
279
cedc9a47
JG		 280 /* size of buffer to pad xfers ending on unaligned boundaries */
281 ATA_DMA_PAD_SZ = 4,
949b38af 282
0c247c55
TH		 283 /* ering size */
284 ATA_ERING_SIZE = 32,
285
31cc23b3
TH		 286 /* return values for ->qc_defer */
287 ATA_DEFER_LINK = 1,
288 ATA_DEFER_PORT = 2,
289
f3e81b19
TH		 290 /* desc_len for ata_eh_info and context */
291 ATA_EH_DESC_LEN = 80,
292
9be1e979
TH		 293 /* reset / recovery action types */
294 ATA_EH_REVALIDATE = (1 << 0),
cf480626
TH		 295 ATA_EH_SOFTRESET = (1 << 1), /* meaningful only in ->prereset */
296 ATA_EH_HARDRESET = (1 << 2), /* meaningful only in ->prereset */
297 ATA_EH_RESET = ATA_EH_SOFTRESET | ATA_EH_HARDRESET,
f9df58cb 298 ATA_EH_ENABLE_LINK = (1 << 3),
3ec25ebd 299 ATA_EH_LPM = (1 << 4), /* link power management action */
9be1e979 300
9666f400 301 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE,
9be1e979 302
f3e81b19 303 /* ata_eh_info->flags */
abdda733 304 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */
1cdaf534
TH		 305 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */
306 ATA_EHI_QUIET = (1 << 3), /* be quiet */
abdda733 307
0d64a233
TH		 308 ATA_EHI_DID_SOFTRESET = (1 << 16), /* already soft-reset this port */
309 ATA_EHI_DID_HARDRESET = (1 << 17), /* already soft-reset this port */
310 ATA_EHI_PRINTINFO = (1 << 18), /* print configuration info */
311 ATA_EHI_SETMODE = (1 << 19), /* configure transfer mode */
312 ATA_EHI_POST_SETMODE = (1 << 20), /* revaildating after setmode */
f3e81b19 313
0d64a233 314 ATA_EHI_DID_RESET = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET,
13abf50d 315
a1e10f7e
TH		 316 /* max tries if error condition is still set after ->error_handler */
317 ATA_EH_MAX_TRIES = 5,
ad9e2762 318
14d2bac1
TH		 319 /* how hard are we gonna try to probe/recover devices */
320 ATA_PROBE_MAX_TRIES = 3,
022bdb07 321 ATA_EH_DEV_TRIES = 3,
e0a71752
TH		 322 ATA_EH_PMP_TRIES = 5,
323 ATA_EH_PMP_LINK_TRIES = 3,
324
325 SATA_PMP_SCR_TIMEOUT = 250,
f5914a46 326
93590859
AC		 327 /* Horkage types. May be set by libata or controller on drives
328 (some horkage may be drive/controller pair dependant */
329
330 ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */
6919a0a6
AC		 331 ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */
332 ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */
18d6e9d5 333 ATA_HORKAGE_MAX_SEC_128 = (1 << 3), /* Limit max sects to 128 */
16c55b03 334 ATA_HORKAGE_BROKEN_HPA = (1 << 4), /* Broken HPA */
e31e8531 335 ATA_HORKAGE_SKIP_PM = (1 << 5), /* Skip PM operations */
93328e11 336 ATA_HORKAGE_HPA_SIZE = (1 << 6), /* native size off by one */
ca77329f 337 ATA_HORKAGE_IPM = (1 << 7), /* Link PM problems */
6bbfd53d 338 ATA_HORKAGE_IVB = (1 << 8), /* cbl det validity bit bugs */
2d3b8eea 339 ATA_HORKAGE_STUCK_ERR = (1 << 9), /* stuck ERR on next PACKET */
b3a70601 340
2dcb407e 341 /* DMA mask for user DMA control: User visible values; DO NOT
b3a70601
AC		 342 renumber */
343 ATA_DMA_MASK_ATA = (1 << 0), /* DMA on ATA Disk */
344 ATA_DMA_MASK_ATAPI = (1 << 1), /* DMA on ATAPI */
345 ATA_DMA_MASK_CFA = (1 << 2), /* DMA on CF Card */
ceb0c642
TH		 346
347 /* ATAPI command types */
348 ATAPI_READ = 0, /* READs */
349 ATAPI_WRITE = 1, /* WRITEs */
350 ATAPI_READ_CD = 2, /* READ CD [MSF] */
e52dcc48
TH		 351 ATAPI_PASS_THRU = 3, /* SAT pass-thru */
352 ATAPI_MISC = 4, /* the rest */
624d5c51
TH		 353
354 /* Timing constants */
355 ATA_TIMING_SETUP = (1 << 0),
356 ATA_TIMING_ACT8B = (1 << 1),
357 ATA_TIMING_REC8B = (1 << 2),
358 ATA_TIMING_CYC8B = (1 << 3),
359 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
360 ATA_TIMING_CYC8B,
361 ATA_TIMING_ACTIVE = (1 << 4),
362 ATA_TIMING_RECOVER = (1 << 5),
363 ATA_TIMING_CYCLE = (1 << 6),
364 ATA_TIMING_UDMA = (1 << 7),
365 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
366 ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
367 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
368 ATA_TIMING_CYCLE | ATA_TIMING_UDMA,
1da177e4
LT		 369};
370
7dc951ae
TH		 371enum ata_xfer_mask {
372 ATA_MASK_PIO = ((1LU << ATA_NR_PIO_MODES) - 1)
373 << ATA_SHIFT_PIO,
374 ATA_MASK_MWDMA = ((1LU << ATA_NR_MWDMA_MODES) - 1)
375 << ATA_SHIFT_MWDMA,
376 ATA_MASK_UDMA = ((1LU << ATA_NR_UDMA_MODES) - 1)
377 << ATA_SHIFT_UDMA,
378};
379
14be71f4 380enum hsm_task_states {
c56b14d2 381 HSM_ST_IDLE, /* no command on going */
71527647
AL		 382 HSM_ST_FIRST, /* (waiting the device to)
383 write CDB or first data block */
c56b14d2
AL		 384 HSM_ST, /* (waiting the device to) transfer data */
385 HSM_ST_LAST, /* (waiting the device to) complete command */
c56b14d2 386 HSM_ST_ERR, /* error */
1da177e4
LT		 387};
388
a7dac447 389enum ata_completion_errors {
11a56d24
TH		 390 AC_ERR_DEV = (1 << 0), /* device reported error */
391 AC_ERR_HSM = (1 << 1), /* host state machine violation */
392 AC_ERR_TIMEOUT = (1 << 2), /* timeout */
393 AC_ERR_MEDIA = (1 << 3), /* media error */
394 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */
395 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */
396 AC_ERR_SYSTEM = (1 << 6), /* system error */
397 AC_ERR_INVALID = (1 << 7), /* invalid argument */
398 AC_ERR_OTHER = (1 << 8), /* unknown */
55a8e2c8 399 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */
5335b729 400 AC_ERR_NCQ = (1 << 10), /* marker for offending NCQ qc */
a7dac447
JG		 401};
402
1da177e4
LT		 403/* forward declarations */
404struct scsi_device;
405struct ata_port_operations;
406struct ata_port;
cc0680a5 407struct ata_link;
1da177e4
LT		 408struct ata_queued_cmd;
409
410/* typedefs */
77853bf2 411typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
cc0680a5
TH		 412typedef int (*ata_prereset_fn_t)(struct ata_link *link, unsigned long deadline);
413typedef int (*ata_reset_fn_t)(struct ata_link *link, unsigned int *classes,
d4b2bab4 414 unsigned long deadline);
cc0680a5 415typedef void (*ata_postreset_fn_t)(struct ata_link *link, unsigned int *classes);
1da177e4 416
ca77329f
KCA		 417/*
418 * host pm policy: If you alter this, you also need to alter libata-scsi.c
419 * (for the ascii descriptions)
420 */
421enum link_pm {
422 NOT_AVAILABLE,
423 MIN_POWER,
424 MAX_PERFORMANCE,
425 MEDIUM_POWER,
426};
427extern struct class_device_attribute class_device_attr_link_power_management_policy;
428
1da177e4 429struct ata_ioports {
0d5ff566
TH		 430 void __iomem *cmd_addr;
431 void __iomem *data_addr;
432 void __iomem *error_addr;
433 void __iomem *feature_addr;
434 void __iomem *nsect_addr;
435 void __iomem *lbal_addr;
436 void __iomem *lbam_addr;
437 void __iomem *lbah_addr;
438 void __iomem *device_addr;
439 void __iomem *status_addr;
440 void __iomem *command_addr;
441 void __iomem *altstatus_addr;
442 void __iomem *ctl_addr;
443 void __iomem *bmdma_addr;
444 void __iomem *scr_addr;
1da177e4
LT		 445};
446
cca3974e 447struct ata_host {
1da177e4
LT		 448 spinlock_t lock;
449 struct device *dev;
0d5ff566 450 void __iomem * const *iomap;
1da177e4
LT		 451 unsigned int n_ports;
452 void *private_data;
029cfd6b 453 struct ata_port_operations *ops;
5444a6f4 454 unsigned long flags;
fafbae87
TH		 455#ifdef CONFIG_ATA_ACPI
456 acpi_handle acpi_handle;
457#endif
032af1ce 458 struct ata_port *simplex_claimed; /* channel owning the DMA */
f0eb62b8 459 struct ata_port *ports[0];
1da177e4
LT		 460};
461
462struct ata_queued_cmd {
463 struct ata_port *ap;
464 struct ata_device *dev;
465
466 struct scsi_cmnd *scsicmd;
467 void (*scsidone)(struct scsi_cmnd *);
468
469 struct ata_taskfile tf;
470 u8 cdb[ATAPI_CDB_LEN];
471
472 unsigned long flags; /* ATA_QCFLAG_xxx */
473 unsigned int tag;
474 unsigned int n_elem;
475
476 int dma_dir;
477
5a5dbd18 478 unsigned int sect_size;
cedc9a47 479
1da177e4 480 unsigned int nbytes;
aacda375 481 unsigned int extrabytes;
1da177e4
LT		 482 unsigned int curbytes;
483
87260216 484 struct scatterlist *cursg;
1da177e4
LT		 485 unsigned int cursg_ofs;
486
487 struct scatterlist sgent;
1da177e4 488
ff2aeb1e 489 struct scatterlist *sg;
1da177e4 490
a22e2eb0 491 unsigned int err_mask;
e61e0672 492 struct ata_taskfile result_tf;
1da177e4
LT		 493 ata_qc_cb_t complete_fn;
494
1da177e4 495 void *private_data;
1c50dc83 496 void *lldd_task;
1da177e4
LT		 497};
498
cca3974e 499struct ata_port_stats {
1da177e4
LT		 500 unsigned long unhandled_irq;
501 unsigned long idle_irq;
502 unsigned long rw_reqbuf;
503};
504
0c247c55 505struct ata_ering_entry {
3884f7b0 506 unsigned int eflags;
0c247c55
TH		 507 unsigned int err_mask;
508 u64 timestamp;
509};
510
511struct ata_ering {
512 int cursor;
513 struct ata_ering_entry ring[ATA_ERING_SIZE];
514};
515
1da177e4 516struct ata_device {
9af5c9c9 517 struct ata_link *link;
72fa4b74 518 unsigned int devno; /* 0 or 1 */
1da177e4 519 unsigned long flags; /* ATA_DFLAG_xxx */
75683fe7 520 unsigned int horkage; /* List of broken features */
3edebac4 521 struct scsi_device *sdev; /* attached SCSI device */
fafbae87
TH		 522#ifdef CONFIG_ATA_ACPI
523 acpi_handle acpi_handle;
398e0782 524 union acpi_object *gtf_cache;
fafbae87 525#endif
72fa4b74
TH		 526 /* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */
527 u64 n_sectors; /* size of device, if ATA */
1da177e4 528 unsigned int class; /* ATA_DEV_xxx */
e0a71752
TH		 529
530 union {
531 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
532 u32 gscr[SATA_PMP_GSCR_DWORDS]; /* PMP GSCR block */
533 };
534
1da177e4
LT		 535 u8 pio_mode;
536 u8 dma_mode;
537 u8 xfer_mode;
538 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
539
8cbd6df1
AL		 540 unsigned int multi_count; /* sectors count for
541 READ/WRITE MULTIPLE */
b00eec1d 542 unsigned int max_sectors; /* per-device max sectors */
6e7846e9 543 unsigned int cdb_len;
8bf62ece 544
acf356b1 545 /* per-dev xfer mask */
7dc951ae
TH		 546 unsigned long pio_mask;
547 unsigned long mwdma_mask;
548 unsigned long udma_mask;
acf356b1 549
8bf62ece
AL		 550 /* for CHS addressing */
551 u16 cylinders; /* Number of cylinders */
552 u16 heads; /* Number of heads */
553 u16 sectors; /* Number of sectors per track */
0c247c55
TH		 554
555 /* error history */
556 struct ata_ering ering;
7d47e8d4 557 int spdn_cnt;
1da177e4
LT		 558};
559
72fa4b74
TH		 560/* Offset into struct ata_device. Fields above it are maintained
561 * acress device init. Fields below are zeroed.
562 */
563#define ATA_DEVICE_CLEAR_OFFSET offsetof(struct ata_device, n_sectors)
564
f3e81b19
TH		 565struct ata_eh_info {
566 struct ata_device *dev; /* offending device */
567 u32 serror; /* SError from LLDD */
568 unsigned int err_mask; /* port-wide err_mask */
569 unsigned int action; /* ATA_EH_* action mask */
47005f25 570 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */
f3e81b19 571 unsigned int flags; /* ATA_EHI_* flags */
abdda733 572
abdda733
TH		 573 unsigned int probe_mask;
574
f3e81b19
TH		 575 char desc[ATA_EH_DESC_LEN];
576 int desc_len;
577};
578
579struct ata_eh_context {
580 struct ata_eh_info i;
581 int tries[ATA_MAX_DEVICES];
abdda733
TH		 582 unsigned int classes[ATA_MAX_DEVICES];
583 unsigned int did_probe_mask;
00115e0f
TH		 584 unsigned int saved_ncq_enabled;
585 u8 saved_xfer_mode[ATA_MAX_DEVICES];
f3e81b19
TH		 586};
587
64578a3d
TH		 588struct ata_acpi_drive
589{
590 u32 pio;
591 u32 dma;
592} __packed;
593
594struct ata_acpi_gtm {
595 struct ata_acpi_drive drive[2];
596 u32 flags;
597} __packed;
598
9af5c9c9
TH		 599struct ata_link {
600 struct ata_port *ap;
8989805d 601 int pmp; /* port multiplier port # */
9af5c9c9
TH		 602
603 unsigned int active_tag; /* active tag on this link */
604 u32 sactive; /* active NCQ commands */
605
0c88758b
TH		 606 unsigned int flags; /* ATA_LFLAG_xxx */
607
9af5c9c9
TH		 608 unsigned int hw_sata_spd_limit;
609 unsigned int sata_spd_limit;
610 unsigned int sata_spd; /* current SATA PHY speed */
611
612 /* record runtime error info, protected by host_set lock */
613 struct ata_eh_info eh_info;
614 /* EH context */
615 struct ata_eh_context eh_context;
616
617 struct ata_device device[ATA_MAX_DEVICES];
618};
619
1da177e4 620struct ata_port {
cca3974e 621 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */
029cfd6b 622 struct ata_port_operations *ops;
ba6a1308 623 spinlock_t *lock;
1da177e4 624 unsigned long flags; /* ATA_FLAG_xxx */
b51e9e5d 625 unsigned int pflags; /* ATA_PFLAG_xxx */
44877b4e
TH		 626 unsigned int print_id; /* user visible unique port ID */
627 unsigned int port_no; /* 0 based port no. inside the host */
1da177e4
LT		 628
629 struct ata_prd *prd; /* our SG list */
630 dma_addr_t prd_dma; /* and its DMA mapping */
631
632 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
633
634 u8 ctl; /* cache of ATA control register */
635 u8 last_ctl; /* Cache last written value */
1da177e4
LT		 636 unsigned int pio_mask;
637 unsigned int mwdma_mask;
638 unsigned int udma_mask;
639 unsigned int cbl; /* cable type; ATA_CBL_xxx */
1da177e4
LT		 640
641 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
6cec4a39 642 unsigned long qc_allocated;
dedaf2b0 643 unsigned int qc_active;
da917d69 644 int nr_active_links; /* #links with active qcs */
dedaf2b0 645
9af5c9c9 646 struct ata_link link; /* host default link */
1da177e4 647
8989805d
TH		 648 int nr_pmp_links; /* nr of available PMP links */
649 struct ata_link *pmp_link; /* array of PMP links */
da917d69 650 struct ata_link *excl_link; /* for PMP qc exclusion */
8989805d 651
cca3974e
JG		 652 struct ata_port_stats stats;
653 struct ata_host *host;
2f1f610b 654 struct device *dev;
1da177e4 655
65f27f38 656 void *port_task_data;
52bad64d
DH		 657 struct delayed_work port_task;
658 struct delayed_work hotplug_task;
3b01b8af 659 struct work_struct scsi_rescan_task;
86e45b6b 660
14be71f4 661 unsigned int hsm_task_state;
1da177e4 662
bfd60579 663 u32 msg_enable;
a72ec4ce 664 struct list_head eh_done_q;
c6cf9e99 665 wait_queue_head_t eh_wait_q;
a1e10f7e 666 int eh_tries;
bfd60579 667
500530f6
TH		 668 pm_message_t pm_mesg;
669 int *pm_result;
ca77329f 670 enum link_pm pm_policy;
500530f6 671
5ddf24c5
TH		 672 struct timer_list fastdrain_timer;
673 unsigned long fastdrain_cnt;
674
1da177e4 675 void *private_data;
fe635c7e 676
fafbae87
TH		 677#ifdef CONFIG_ATA_ACPI
678 acpi_handle acpi_handle;
c05e6ff0 679 struct ata_acpi_gtm __acpi_init_gtm; /* use ata_acpi_init_gtm() */
fafbae87 680#endif
fe635c7e 681 u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */
1da177e4
LT		 682};
683
029cfd6b
TH		 684/* The following initializer overrides a method to NULL whether one of
685 * its parent has the method defined or not. This is equivalent to
686 * ERR_PTR(-ENOENT). Unfortunately, ERR_PTR doesn't render a constant
687 * expression and thus can't be used as an initializer.
688 */
689#define ATA_OP_NULL (void *)(unsigned long)(-ENOENT)
690
1da177e4 691struct ata_port_operations {
c1bc899f
TH		 692 /*
693 * Command execution
694 */
695 int (*qc_defer)(struct ata_queued_cmd *qc);
696 int (*check_atapi_dma)(struct ata_queued_cmd *qc);
697 void (*qc_prep)(struct ata_queued_cmd *qc);
698 unsigned int (*qc_issue)(struct ata_queued_cmd *qc);
1da177e4 699
c1bc899f
TH		 700 /*
701 * Configuration and exception handling
702 */
703 int (*cable_detect)(struct ata_port *ap);
704 unsigned long (*mode_filter)(struct ata_device *dev, unsigned long xfer_mask);
705 void (*set_piomode)(struct ata_port *ap, struct ata_device *dev);
706 void (*set_dmamode)(struct ata_port *ap, struct ata_device *dev);
707 int (*set_mode)(struct ata_link *link, struct ata_device **r_failed_dev);
1da177e4 708
c1bc899f 709 void (*dev_config)(struct ata_device *dev);
1da177e4 710
c1bc899f
TH		 711 void (*freeze)(struct ata_port *ap);
712 void (*thaw)(struct ata_port *ap);
a1efdaba
TH		 713 ata_prereset_fn_t prereset;
714 ata_reset_fn_t softreset;
715 ata_reset_fn_t hardreset;
716 ata_postreset_fn_t postreset;
717 ata_prereset_fn_t pmp_prereset;
718 ata_reset_fn_t pmp_softreset;
719 ata_reset_fn_t pmp_hardreset;
720 ata_postreset_fn_t pmp_postreset;
c1bc899f
TH		 721 void (*error_handler)(struct ata_port *ap);
722 void (*post_internal_cmd)(struct ata_queued_cmd *qc);
723
724 /*
725 * Optional features
726 */
727 int (*scr_read)(struct ata_port *ap, unsigned int sc_reg, u32 *val);
728 int (*scr_write)(struct ata_port *ap, unsigned int sc_reg, u32 val);
729 void (*pmp_attach)(struct ata_port *ap);
730 void (*pmp_detach)(struct ata_port *ap);
731 int (*enable_pm)(struct ata_port *ap, enum link_pm policy);
732 void (*disable_pm)(struct ata_port *ap);
733
734 /*
735 * Start, stop, suspend and resume
736 */
737 int (*port_suspend)(struct ata_port *ap, pm_message_t mesg);
738 int (*port_resume)(struct ata_port *ap);
739 int (*port_start)(struct ata_port *ap);
740 void (*port_stop)(struct ata_port *ap);
741 void (*host_stop)(struct ata_host *host);
742
743 /*
744 * SFF / taskfile oriented ops
745 */
5682ed33
TH		 746 void (*sff_dev_select)(struct ata_port *ap, unsigned int device);
747 u8 (*sff_check_status)(struct ata_port *ap);
748 u8 (*sff_check_altstatus)(struct ata_port *ap);
749 void (*sff_tf_load)(struct ata_port *ap, const struct ata_taskfile *tf);
750 void (*sff_tf_read)(struct ata_port *ap, struct ata_taskfile *tf);
751 void (*sff_exec_command)(struct ata_port *ap,
752 const struct ata_taskfile *tf);
753 unsigned int (*sff_data_xfer)(struct ata_device *dev,
754 unsigned char *buf, unsigned int buflen, int rw);
755 u8 (*sff_irq_on)(struct ata_port *);
756 void (*sff_irq_clear)(struct ata_port *);
757
c1bc899f
TH		 758 void (*bmdma_setup)(struct ata_queued_cmd *qc);
759 void (*bmdma_start)(struct ata_queued_cmd *qc);
760 void (*bmdma_stop)(struct ata_queued_cmd *qc);
761 u8 (*bmdma_status)(struct ata_port *ap);
762
763 /*
764 * Obsolete
9ec957f2 765 */
c1bc899f
TH		 766 void (*phy_reset)(struct ata_port *ap);
767 void (*eng_timeout)(struct ata_port *ap);
029cfd6b
TH		 768
769 /*
770 * ->inherits must be the last field and all the preceding
771 * fields must be pointers.
772 */
773 const struct ata_port_operations *inherits;
1da177e4
LT		 774};
775
776struct ata_port_info {
cca3974e 777 unsigned long flags;
0c88758b 778 unsigned long link_flags;
1da177e4
LT		 779 unsigned long pio_mask;
780 unsigned long mwdma_mask;
781 unsigned long udma_mask;
029cfd6b 782 struct ata_port_operations *port_ops;
e99f8b5e 783 void *private_data;
1da177e4
LT		 784};
785
452503f9
AC		 786struct ata_timing {
787 unsigned short mode; /* ATA mode */
788 unsigned short setup; /* t1 */
789 unsigned short act8b; /* t2 for 8-bit I/O */
790 unsigned short rec8b; /* t2i for 8-bit I/O */
791 unsigned short cyc8b; /* t0 for 8-bit I/O */
792 unsigned short active; /* t2 or tD */
793 unsigned short recover; /* t2i or tK */
794 unsigned short cycle; /* t0 */
795 unsigned short udma; /* t2CYCTYP/2 */
796};
797
2dcb407e 798#define FIT(v, vmin, vmax) max_t(short, min_t(short, v, vmax), vmin)
1da177e4 799
624d5c51
TH		 800/*
801 * Core layer - drivers/ata/libata-core.c
802 */
e9c83914
TH		 803extern const unsigned long sata_deb_timing_normal[];
804extern const unsigned long sata_deb_timing_hotplug[];
805extern const unsigned long sata_deb_timing_long[];
806
029cfd6b 807extern struct ata_port_operations ata_dummy_port_ops;
21b0ad4f 808extern const struct ata_port_info ata_dummy_port_info;
dd5b06c4 809
e9c83914
TH		 810static inline const unsigned long *
811sata_ehc_deb_timing(struct ata_eh_context *ehc)
812{
813 if (ehc->i.flags & ATA_EHI_HOTPLUGGED)
814 return sata_deb_timing_hotplug;
815 else
816 return sata_deb_timing_normal;
817}
d7bb4cc7 818
dd5b06c4
TH		 819static inline int ata_port_is_dummy(struct ata_port *ap)
820{
821 return ap->ops == &ata_dummy_port_ops;
822}
823
936fd732 824extern void sata_print_link_status(struct ata_link *link);
1da177e4 825extern void ata_port_probe(struct ata_port *);
936fd732
TH		 826extern int sata_set_spd(struct ata_link *link);
827extern int sata_link_debounce(struct ata_link *link,
828 const unsigned long *params, unsigned long deadline);
829extern int sata_link_resume(struct ata_link *link, const unsigned long *params,
830 unsigned long deadline);
cc0680a5
TH		 831extern int sata_link_hardreset(struct ata_link *link,
832 const unsigned long *timing, unsigned long deadline);
1da177e4 833extern void ata_port_disable(struct ata_port *);
2855568b 834
f3187195 835extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports);
f5cda257
TH		 836extern struct ata_host *ata_host_alloc_pinfo(struct device *dev,
837 const struct ata_port_info * const * ppi, int n_ports);
ecef7253 838extern int ata_host_start(struct ata_host *host);
f3187195
TH		 839extern int ata_host_register(struct ata_host *host,
840 struct scsi_host_template *sht);
f5cda257
TH		 841extern int ata_host_activate(struct ata_host *host, int irq,
842 irq_handler_t irq_handler, unsigned long irq_flags,
843 struct scsi_host_template *sht);
0529c159 844extern void ata_host_detach(struct ata_host *host);
cca3974e 845extern void ata_host_init(struct ata_host *, struct device *,
029cfd6b 846 unsigned long, struct ata_port_operations *);
193515d5 847extern int ata_scsi_detect(struct scsi_host_template *sht);
1da177e4
LT		 848extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
849extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *));
80289167 850extern void ata_sas_port_destroy(struct ata_port *);
cca3974e 851extern struct ata_port *ata_sas_port_alloc(struct ata_host *,
80289167
BK		 852 struct ata_port_info *, struct Scsi_Host *);
853extern int ata_sas_port_init(struct ata_port *);
854extern int ata_sas_port_start(struct ata_port *ap);
855extern void ata_sas_port_stop(struct ata_port *ap);
856extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *);
857extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
858 struct ata_port *ap);
936fd732
TH		 859extern int sata_scr_valid(struct ata_link *link);
860extern int sata_scr_read(struct ata_link *link, int reg, u32 *val);
861extern int sata_scr_write(struct ata_link *link, int reg, u32 val);
862extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val);
863extern int ata_link_online(struct ata_link *link);
864extern int ata_link_offline(struct ata_link *link);
6ffa01d8 865#ifdef CONFIG_PM
cca3974e
JG		 866extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg);
867extern void ata_host_resume(struct ata_host *host);
6ffa01d8 868#endif
67846b30 869extern int ata_ratelimit(void);
c22daff4
TH		 870extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
871 unsigned long interval_msec,
872 unsigned long timeout_msec);
436d34b3 873extern int atapi_cmd_type(u8 opcode);
9977126c
TH		 874extern void ata_tf_to_fis(const struct ata_taskfile *tf,
875 u8 pmp, int is_cmd, u8 *fis);
057ace5e 876extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
7dc951ae
TH		 877extern unsigned long ata_pack_xfermask(unsigned long pio_mask,
878 unsigned long mwdma_mask, unsigned long udma_mask);
879extern void ata_unpack_xfermask(unsigned long xfer_mask,
880 unsigned long *pio_mask, unsigned long *mwdma_mask,
881 unsigned long *udma_mask);
882extern u8 ata_xfer_mask2mode(unsigned long xfer_mask);
883extern unsigned long ata_xfer_mode2mask(u8 xfer_mode);
884extern int ata_xfer_mode2shift(unsigned long xfer_mode);
885extern const char *ata_mode_string(unsigned long xfer_mask);
886extern unsigned long ata_id_xfermask(const u16 *id);
2dcb407e 887extern void ata_noop_dev_select(struct ata_port *ap, unsigned int device);
2dcb407e 888extern int ata_port_start(struct ata_port *ap);
31cc23b3 889extern int ata_std_qc_defer(struct ata_queued_cmd *qc);
e46834cd 890extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
1da177e4
LT		 891extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
892 unsigned int n_elem);
057ace5e 893extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
10305f0f 894extern void ata_dev_disable(struct ata_device *adev);
6a62a04d
TH		 895extern void ata_id_string(const u16 *id, unsigned char *s,
896 unsigned int ofs, unsigned int len);
897extern void ata_id_c_string(const u16 *id, unsigned char *s,
898 unsigned int ofs, unsigned int len);
f686bcb8 899extern void ata_qc_complete(struct ata_queued_cmd *qc);
dedaf2b0
TH		 900extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active,
901 void (*finish_qc)(struct ata_queued_cmd *));
3373efd8 902extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
1da177e4
LT		 903 void (*done)(struct scsi_cmnd *));
904extern int ata_std_bios_param(struct scsi_device *sdev,
905 struct block_device *bdev,
906 sector_t capacity, int geom[]);
907extern int ata_scsi_slave_config(struct scsi_device *sdev);
83c47bcb 908extern void ata_scsi_slave_destroy(struct scsi_device *sdev);
a6e6ce8e
TH		 909extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
910 int queue_depth);
3373efd8 911extern struct ata_device *ata_dev_pair(struct ata_device *adev);
0260731f 912extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev);
1da177e4 913
be0d18df
AC		 914extern int ata_cable_40wire(struct ata_port *ap);
915extern int ata_cable_80wire(struct ata_port *ap);
916extern int ata_cable_sata(struct ata_port *ap);
c88f90c3 917extern int ata_cable_ignore(struct ata_port *ap);
be0d18df
AC		 918extern int ata_cable_unknown(struct ata_port *ap);
919
624d5c51 920/* Timing helpers */
1bc4ccff 921extern unsigned int ata_pio_need_iordy(const struct ata_device *);
6357357c 922extern const struct ata_timing *ata_timing_find_mode(u8 xfer_mode);
452503f9
AC		 923extern int ata_timing_compute(struct ata_device *, unsigned short,
924 struct ata_timing *, int, int);
925extern void ata_timing_merge(const struct ata_timing *,
926 const struct ata_timing *, struct ata_timing *,
927 unsigned int);
a0f79b92 928extern u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle);
452503f9 929
624d5c51
TH		 930/* PCI */
931#ifdef CONFIG_PCI
932struct pci_dev;
933
934struct pci_bits {
935 unsigned int reg; /* PCI config register to read */
936 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
937 unsigned long mask;
938 unsigned long val;
452503f9
AC		 939};
940
624d5c51
TH		 941extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
942extern void ata_pci_remove_one(struct pci_dev *pdev);
943
944#ifdef CONFIG_PM
945extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg);
946extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev);
947extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
948extern int ata_pci_device_resume(struct pci_dev *pdev);
949#endif /* CONFIG_PM */
950#endif /* CONFIG_PCI */
951
952/*
953 * ACPI - drivers/ata/libata-acpi.c
954 */
e1ddb4b6 955#ifdef CONFIG_ATA_ACPI
c05e6ff0
TH		 956static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
957{
958 if (ap->pflags & ATA_PFLAG_INIT_GTM_VALID)
959 return &ap->__acpi_init_gtm;
960 return NULL;
961}
0d02f0b2
TH		 962int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm);
963int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *stm);
7c77fa4d
TH		 964unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev,
965 const struct ata_acpi_gtm *gtm);
021ee9a6 966int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm);
e1ddb4b6 967#else
c05e6ff0
TH		 968static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
969{
970 return NULL;
971}
7c77fa4d
TH		 972
973static inline int ata_acpi_stm(const struct ata_port *ap,
974 struct ata_acpi_gtm *stm)
975{
976 return -ENOSYS;
977}
978
979static inline int ata_acpi_gtm(const struct ata_port *ap,
980 struct ata_acpi_gtm *stm)
981{
982 return -ENOSYS;
983}
984
985static inline unsigned int ata_acpi_gtm_xfermask(struct ata_device *dev,
986 const struct ata_acpi_gtm *gtm)
987{
988 return 0;
989}
021ee9a6
TH		 990
991static inline int ata_acpi_cbl_80wire(struct ata_port *ap,
992 const struct ata_acpi_gtm *gtm)
993{
994 return 0;
995}
e1ddb4b6 996#endif
1da177e4 997
3af9a77a 998/*
624d5c51 999 * PMP - drivers/ata/libata-pmp.c
3af9a77a 1000 */
31f88384 1001extern int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc);
3af9a77a
TH		 1002extern int sata_pmp_std_prereset(struct ata_link *link, unsigned long deadline);
1003extern int sata_pmp_std_hardreset(struct ata_link *link, unsigned int *class,
1004 unsigned long deadline);
1005extern void sata_pmp_std_postreset(struct ata_link *link, unsigned int *class);
a1efdaba 1006extern void sata_pmp_error_handler(struct ata_port *ap);
3af9a77a 1007
ece1d636 1008/*
624d5c51 1009 * EH - drivers/ata/libata-eh.c
ece1d636 1010 */
7b70fc03 1011extern void ata_port_schedule_eh(struct ata_port *ap);
dbd82616 1012extern int ata_link_abort(struct ata_link *link);
7b70fc03 1013extern int ata_port_abort(struct ata_port *ap);
e3180499 1014extern int ata_port_freeze(struct ata_port *ap);
7d77b247 1015extern int sata_async_notification(struct ata_port *ap);
e3180499
TH		 1016
1017extern void ata_eh_freeze_port(struct ata_port *ap);
1018extern void ata_eh_thaw_port(struct ata_port *ap);
7b70fc03 1019
ece1d636
TH		 1020extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
1021extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
1022
f5914a46
TH		 1023extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
1024 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
1025 ata_postreset_fn_t postreset);
a1efdaba 1026extern void ata_std_error_handler(struct ata_port *ap);
022bdb07 1027
68d1d07b
TH		 1028/*
1029 * Base operations to inherit from and initializers for sht
1030 *
1031 * Operations
1032 *
1033 * base : Common to all libata drivers.
1034 * sata : SATA controllers w/ native interface.
1035 * pmp : SATA controllers w/ PMP support.
1036 * sff : SFF ATA controllers w/o BMDMA support.
1037 * bmdma : SFF ATA controllers w/ BMDMA support.
1038 *
1039 * sht initializers
1040 *
1041 * BASE : Common to all libata drivers. The user must set
1042 * sg_tablesize and dma_boundary.
1043 * PIO : SFF ATA controllers w/ only PIO support.
1044 * BMDMA : SFF ATA controllers w/ BMDMA support. sg_tablesize and
1045 * dma_boundary are set to BMDMA limits.
1046 * NCQ : SATA controllers supporting NCQ. The user must set
1047 * sg_tablesize, dma_boundary and can_queue.
1048 */
1049extern const struct ata_port_operations ata_base_port_ops;
1050extern const struct ata_port_operations sata_port_ops;
1051extern const struct ata_port_operations sata_pmp_port_ops;
68d1d07b
TH		 1052
1053#define ATA_BASE_SHT(drv_name) \
1054 .module = THIS_MODULE, \
1055 .name = drv_name, \
1056 .ioctl = ata_scsi_ioctl, \
1057 .queuecommand = ata_scsi_queuecmd, \
1058 .can_queue = ATA_DEF_QUEUE, \
1059 .this_id = ATA_SHT_THIS_ID, \
1060 .cmd_per_lun = ATA_SHT_CMD_PER_LUN, \
1061 .emulated = ATA_SHT_EMULATED, \
1062 .use_clustering = ATA_SHT_USE_CLUSTERING, \
1063 .proc_name = drv_name, \
1064 .slave_configure = ata_scsi_slave_config, \
1065 .slave_destroy = ata_scsi_slave_destroy, \
1066 .bios_param = ata_std_bios_param
1067
68d1d07b
TH		 1068#define ATA_NCQ_SHT(drv_name) \
1069 ATA_BASE_SHT(drv_name), \
1070 .change_queue_depth = ata_scsi_change_queue_depth
1071
61440db6
TH		 1072/*
1073 * printk helpers
1074 */
1075#define ata_port_printk(ap, lv, fmt, args...) \
c2e366a1 1076 printk("%sata%u: "fmt, lv, (ap)->print_id , ##args)
61440db6 1077
8989805d
TH		 1078#define ata_link_printk(link, lv, fmt, args...) do { \
1079 if ((link)->ap->nr_pmp_links) \
c2e366a1 1080 printk("%sata%u.%02u: "fmt, lv, (link)->ap->print_id, \
8989805d
TH		 1081 (link)->pmp , ##args); \
1082 else \
c2e366a1 1083 printk("%sata%u: "fmt, lv, (link)->ap->print_id , ##args); \
8989805d 1084 } while(0)
9af5c9c9 1085
61440db6 1086#define ata_dev_printk(dev, lv, fmt, args...) \
c2e366a1 1087 printk("%sata%u.%02u: "fmt, lv, (dev)->link->ap->print_id, \
8989805d 1088 (dev)->link->pmp + (dev)->devno , ##args)
1da177e4 1089
f3e81b19
TH		 1090/*
1091 * ata_eh_info helpers
1092 */
cb94c1cf
TH		 1093extern void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...)
1094 __attribute__ ((format (printf, 2, 3)));
1095extern void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...)
1096 __attribute__ ((format (printf, 2, 3)));
b64bbc39 1097extern void ata_ehi_clear_desc(struct ata_eh_info *ehi);
f3e81b19 1098
c0b6c037
TH		 1099static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
1100{
b558eddd 1101 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
f8f1e1cc 1102 ehi->flags |= ATA_EHI_HOTPLUGGED;
b558eddd 1103 ehi->action |= ATA_EH_RESET | ATA_EH_ENABLE_LINK;
c0b6c037
TH		 1104 ehi->err_mask |= AC_ERR_ATA_BUS;
1105}
1106
cbcdd875
TH		 1107/*
1108 * port description helpers
1109 */
1110extern void ata_port_desc(struct ata_port *ap, const char *fmt, ...)
1111 __attribute__ ((format (printf, 2, 3)));
1112#ifdef CONFIG_PCI
1113extern void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset,
1114 const char *name);
1115#endif
1116
1da177e4
LT		 1117static inline unsigned int ata_tag_valid(unsigned int tag)
1118{
1119 return (tag < ATA_MAX_QUEUE) ? 1 : 0;
1120}
1121
2ab7db1f
TH		 1122static inline unsigned int ata_tag_internal(unsigned int tag)
1123{
83c063dd 1124 return tag == ATA_TAG_INTERNAL;
2ab7db1f
TH		 1125}
1126
5806db22
TH		 1127/*
1128 * device helpers
1129 */
e1211e3f 1130static inline unsigned int ata_class_enabled(unsigned int class)
597afd21 1131{
e0a71752
TH		 1132 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI ||
1133 class == ATA_DEV_PMP || class == ATA_DEV_SEMB;
597afd21
TH		 1134}
1135
e1211e3f 1136static inline unsigned int ata_class_disabled(unsigned int class)
1da177e4 1137{
e0a71752
TH		 1138 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP ||
1139 class == ATA_DEV_PMP_UNSUP || class == ATA_DEV_SEMB_UNSUP;
e1211e3f
TH		 1140}
1141
002c8054
TH		 1142static inline unsigned int ata_class_absent(unsigned int class)
1143{
1144 return !ata_class_enabled(class) && !ata_class_disabled(class);
1145}
1146
e1211e3f
TH		 1147static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
1148{
1149 return ata_class_enabled(dev->class);
1150}
1151
1152static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
1153{
1154 return ata_class_disabled(dev->class);
1da177e4
LT		 1155}
1156
002c8054
TH		 1157static inline unsigned int ata_dev_absent(const struct ata_device *dev)
1158{
1159 return ata_class_absent(dev->class);
1160}
1161
5806db22 1162/*
f58229f8 1163 * link helpers
5806db22 1164 */
8989805d
TH		 1165static inline int ata_is_host_link(const struct ata_link *link)
1166{
1167 return link == &link->ap->link;
1168}
1169
f58229f8 1170static inline int ata_link_max_devices(const struct ata_link *link)
5806db22 1171{
8989805d 1172 if (ata_is_host_link(link) && link->ap->flags & ATA_FLAG_SLAVE_POSS)
5806db22
TH		 1173 return 2;
1174 return 1;
1175}
1176
da917d69
TH		 1177static inline int ata_link_active(struct ata_link *link)
1178{
1179 return ata_tag_valid(link->active_tag) || link->sactive;
1180}
1181
8989805d
TH		 1182static inline struct ata_link *ata_port_first_link(struct ata_port *ap)
1183{
1184 if (ap->nr_pmp_links)
1185 return ap->pmp_link;
1186 return &ap->link;
1187}
1188
1189static inline struct ata_link *ata_port_next_link(struct ata_link *link)
1190{
1191 struct ata_port *ap = link->ap;
1192
1193 if (link == &ap->link) {
1194 if (!ap->nr_pmp_links)
1195 return NULL;
1196 return ap->pmp_link;
1197 }
1198
5d44b414 1199 if (++link < ap->nr_pmp_links + ap->pmp_link)
8989805d
TH		 1200 return link;
1201 return NULL;
1202}
1203
1204#define __ata_port_for_each_link(lk, ap) \
1205 for ((lk) = &(ap)->link; (lk); (lk) = ata_port_next_link(lk))
1206
1207#define ata_port_for_each_link(link, ap) \
1208 for ((link) = ata_port_first_link(ap); (link); \
1209 (link) = ata_port_next_link(link))
f58229f8
TH		 1210
1211#define ata_link_for_each_dev(dev, link) \
1212 for ((dev) = (link)->device; \
1213 (dev) < (link)->device + ata_link_max_devices(link) || ((dev) = NULL); \
1214 (dev)++)
1215
1216#define ata_link_for_each_dev_reverse(dev, link) \
1217 for ((dev) = (link)->device + ata_link_max_devices(link) - 1; \
1218 (dev) >= (link)->device || ((dev) = NULL); (dev)--)
5806db22 1219
6d1245bf
TH		 1220/**
1221 * ata_ncq_enabled - Test whether NCQ is enabled
1222 * @dev: ATA device to test for
1223 *
1224 * LOCKING:
1225 * spin_lock_irqsave(host lock)
1226 *
1227 * RETURNS:
1228 * 1 if NCQ is enabled for @dev, 0 otherwise.
1229 */
1230static inline int ata_ncq_enabled(struct ata_device *dev)
1231{
1232 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF |
1233 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ;
1234}
0baab86b 1235
1da177e4
LT		 1236static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
1237{
1238 qc->tf.ctl |= ATA_NIEN;
1239}
1240
f69499f4
TH		 1241static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap,
1242 unsigned int tag)
1da177e4
LT		 1243{
1244 if (likely(ata_tag_valid(tag)))
1245 return &ap->qcmd[tag];
1246 return NULL;
1247}
1248
f69499f4
TH		 1249static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap,
1250 unsigned int tag)
1251{
1252 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
1253
1254 if (unlikely(!qc) || !ap->ops->error_handler)
1255 return qc;
1256
1257 if ((qc->flags & (ATA_QCFLAG_ACTIVE |
1258 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE)
1259 return qc;
1260
1261 return NULL;
1262}
1263
aacda375
TH		 1264static inline unsigned int ata_qc_raw_nbytes(struct ata_queued_cmd *qc)
1265{
1266 return qc->nbytes - min(qc->extrabytes, qc->nbytes);
1267}
1268
3373efd8 1269static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
1da177e4
LT		 1270{
1271 memset(tf, 0, sizeof(*tf));
1272
9af5c9c9 1273 tf->ctl = dev->link->ap->ctl;
3373efd8 1274 if (dev->devno == 0)
1da177e4
LT		 1275 tf->device = ATA_DEVICE_OBS;
1276 else
1277 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
1278}
1279
2c13b7ce
JG		 1280static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
1281{
501e0c50 1282 qc->dma_dir = DMA_NONE;
ff2aeb1e 1283 qc->sg = NULL;
2c13b7ce 1284 qc->flags = 0;
87260216
JA		 1285 qc->cursg = NULL;
1286 qc->cursg_ofs = 0;
aacda375 1287 qc->nbytes = qc->extrabytes = qc->curbytes = 0;
7a801184 1288 qc->n_elem = 0;
a22e2eb0 1289 qc->err_mask = 0;
5a5dbd18 1290 qc->sect_size = ATA_SECT_SIZE;
2c13b7ce 1291
3373efd8 1292 ata_tf_init(qc->dev, &qc->tf);
e61e0672
TH		 1293
1294 /* init result_tf such that it indicates normal completion */
1295 qc->result_tf.command = ATA_DRDY;
1296 qc->result_tf.feature = 0;
2c13b7ce
JG		 1297}
1298
057ace5e 1299static inline int ata_try_flush_cache(const struct ata_device *dev)
1da177e4
LT		 1300{
1301 return ata_id_wcache_enabled(dev->id) ||
1302 ata_id_has_flush(dev->id) ||
1303 ata_id_has_flush_ext(dev->id);
1304}
1305
a7dac447
JG		 1306static inline unsigned int ac_err_mask(u8 status)
1307{
3655d1d3 1308 if (status & (ATA_BUSY | ATA_DRQ))
11a56d24 1309 return AC_ERR_HSM;
a7dac447
JG		 1310 if (status & (ATA_ERR | ATA_DF))
1311 return AC_ERR_DEV;
1312 return 0;
1313}
1314
1315static inline unsigned int __ac_err_mask(u8 status)
1316{
1317 unsigned int mask = ac_err_mask(status);
1318 if (mask == 0)
1319 return AC_ERR_OTHER;
1320 return mask;
1321}
1322
35bb94b1
JG		 1323static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
1324{
4911487a 1325 return *(struct ata_port **)&host->hostdata[0];
35bb94b1
JG		 1326}
1327
624d5c51
TH		 1328/**************************************************************************
1329 * SFF - drivers/ata/libata-sff.c
1330 */
1331extern const struct ata_port_operations ata_sff_port_ops;
1332extern const struct ata_port_operations ata_bmdma_port_ops;
1333
1334/* PIO only, sg_tablesize and dma_boundary limits can be removed */
1335#define ATA_PIO_SHT(drv_name) \
1336 ATA_BASE_SHT(drv_name), \
1337 .sg_tablesize = LIBATA_MAX_PRD, \
1338 .dma_boundary = ATA_DMA_BOUNDARY
1339
1340#define ATA_BMDMA_SHT(drv_name) \
1341 ATA_BASE_SHT(drv_name), \
1342 .sg_tablesize = LIBATA_MAX_PRD, \
1343 .dma_boundary = ATA_DMA_BOUNDARY
1344
9363c382
TH		 1345extern void ata_sff_qc_prep(struct ata_queued_cmd *qc);
1346extern void ata_sff_dumb_qc_prep(struct ata_queued_cmd *qc);
1347extern void ata_sff_dev_select(struct ata_port *ap, unsigned int device);
1348extern u8 ata_sff_check_status(struct ata_port *ap);
1349extern u8 ata_sff_altstatus(struct ata_port *ap);
1350extern int ata_sff_busy_sleep(struct ata_port *ap,
1351 unsigned long timeout_pat, unsigned long timeout);
1352extern int ata_sff_wait_ready(struct ata_port *ap, unsigned long deadline);
1353extern void ata_sff_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
1354extern void ata_sff_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
1355extern void ata_sff_exec_command(struct ata_port *ap,
1356 const struct ata_taskfile *tf);
1357extern unsigned int ata_sff_data_xfer(struct ata_device *dev,
624d5c51 1358 unsigned char *buf, unsigned int buflen, int rw);
9363c382 1359extern unsigned int ata_sff_data_xfer_noirq(struct ata_device *dev,
624d5c51 1360 unsigned char *buf, unsigned int buflen, int rw);
9363c382
TH		 1361extern u8 ata_sff_irq_on(struct ata_port *ap);
1362extern void ata_sff_irq_clear(struct ata_port *ap);
1363extern int ata_sff_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
1364 u8 status, int in_wq);
1365extern unsigned int ata_sff_qc_issue(struct ata_queued_cmd *qc);
1366extern unsigned int ata_sff_host_intr(struct ata_port *ap,
1367 struct ata_queued_cmd *qc);
1368extern irqreturn_t ata_sff_interrupt(int irq, void *dev_instance);
1369extern void ata_sff_freeze(struct ata_port *ap);
1370extern void ata_sff_thaw(struct ata_port *ap);
1371extern int ata_sff_prereset(struct ata_link *link, unsigned long deadline);
1372extern unsigned int ata_sff_dev_classify(struct ata_device *dev, int present,
1373 u8 *r_err);
1374extern void ata_sff_wait_after_reset(struct ata_port *ap,
1375 unsigned long deadline);
1376extern int ata_sff_softreset(struct ata_link *link, unsigned int *classes,
624d5c51 1377 unsigned long deadline);
9363c382
TH		 1378extern int sata_sff_hardreset(struct ata_link *link, unsigned int *class,
1379 unsigned long deadline);
1380extern void ata_sff_postreset(struct ata_link *link, unsigned int *classes);
1381extern void ata_sff_error_handler(struct ata_port *ap);
1382extern void ata_sff_post_internal_cmd(struct ata_queued_cmd *qc);
624d5c51 1383extern int ata_sff_port_start(struct ata_port *ap);
9363c382
TH		 1384extern void ata_sff_std_ports(struct ata_ioports *ioaddr);
1385extern unsigned long ata_bmdma_mode_filter(struct ata_device *dev,
1386 unsigned long xfer_mask);
624d5c51
TH		 1387extern void ata_bmdma_setup(struct ata_queued_cmd *qc);
1388extern void ata_bmdma_start(struct ata_queued_cmd *qc);
1389extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
1390extern u8 ata_bmdma_status(struct ata_port *ap);
1391extern void ata_bus_reset(struct ata_port *ap);
1392
1393#ifdef CONFIG_PCI
9363c382
TH		 1394extern int ata_pci_bmdma_clear_simplex(struct pci_dev *pdev);
1395extern int ata_pci_bmdma_init(struct ata_host *host);
1396extern int ata_pci_sff_init_host(struct ata_host *host);
1397extern int ata_pci_sff_prepare_host(struct pci_dev *pdev,
624d5c51
TH		 1398 const struct ata_port_info * const * ppi,
1399 struct ata_host **r_host);
9363c382 1400extern int ata_pci_sff_activate_host(struct ata_host *host,
624d5c51
TH		 1401 irq_handler_t irq_handler,
1402 struct scsi_host_template *sht);
9363c382
TH		 1403extern int ata_pci_sff_init_one(struct pci_dev *pdev,
1404 const struct ata_port_info * const * ppi,
1405 struct scsi_host_template *sht, void *host_priv);
624d5c51
TH		 1406#endif /* CONFIG_PCI */
1407
624d5c51 1408/**
9363c382 1409 * ata_sff_pause - Flush writes and pause 400 nanoseconds.
624d5c51
TH		 1410 * @ap: Port to wait for.
1411 *
1412 * LOCKING:
1413 * Inherited from caller.
1414 */
9363c382 1415static inline void ata_sff_pause(struct ata_port *ap)
624d5c51 1416{
9363c382 1417 ata_sff_altstatus(ap);
624d5c51
TH		 1418 ndelay(400);
1419}
1420
1421/**
9363c382 1422 * ata_sff_busy_wait - Wait for a port status register
624d5c51
TH		 1423 * @ap: Port to wait for.
1424 * @bits: bits that must be clear
1425 * @max: number of 10uS waits to perform
1426 *
1427 * Waits up to max*10 microseconds for the selected bits in the port's
1428 * status register to be cleared.
1429 * Returns final value of status register.
1430 *
1431 * LOCKING:
1432 * Inherited from caller.
1433 */
9363c382
TH		 1434static inline u8 ata_sff_busy_wait(struct ata_port *ap, unsigned int bits,
1435 unsigned int max)
624d5c51
TH		 1436{
1437 u8 status;
1438
1439 do {
1440 udelay(10);
5682ed33 1441 status = ap->ops->sff_check_status(ap);
624d5c51
TH		 1442 max--;
1443 } while (status != 0xff && (status & bits) && (max > 0));
1444
1445 return status;
1446}
1447
1448/**
1449 * ata_wait_idle - Wait for a port to be idle.
1450 * @ap: Port to wait for.
1451 *
1452 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
1453 * Returns final value of status register.
1454 *
1455 * LOCKING:
1456 * Inherited from caller.
1457 */
1458static inline u8 ata_wait_idle(struct ata_port *ap)
1459{
9363c382 1460 u8 status = ata_sff_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
624d5c51
TH		 1461
1462#ifdef ATA_DEBUG
1463 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ)))
1464 ata_port_printk(ap, KERN_DEBUG, "abnormal Status 0x%X\n",
1465 status);
1466#endif
1467
1468 return status;
1469}
1470
1da177e4 1471#endif /* __LINUX_LIBATA_H__ */
kernel source for telekom puls (alcatel/mediatek)