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libata: add ATAPI_* cmd types and implement atapi_cmd_type()
[deliverable/linux.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
1da177e4
LT		 125 ATA_SHT_EMULATED = 1,
126 ATA_SHT_CMD_PER_LUN = 1,
127 ATA_SHT_THIS_ID = -1,
cf482935 128 ATA_SHT_USE_CLUSTERING = 1,
1da177e4
LT		 129
130 /* struct ata_device stuff */
949b38af
TH		 131 ATA_DFLAG_LBA = (1 << 0), /* device supports LBA */
132 ATA_DFLAG_LBA48 = (1 << 1), /* device supports LBA48 */
029f5468 133 ATA_DFLAG_CDB_INTR = (1 << 2), /* device asserts INTRQ when ready for CDB */
88e49034 134 ATA_DFLAG_NCQ = (1 << 3), /* device supports NCQ */
6fc49adb 135 ATA_DFLAG_FLUSH_EXT = (1 << 4), /* do FLUSH_EXT instead of FLUSH */
6746544c
TH		 136 ATA_DFLAG_ACPI_PENDING = (1 << 5), /* ACPI resume action pending */
137 ATA_DFLAG_ACPI_FAILED = (1 << 6), /* ACPI on devcfg has failed */
7d77b247 138 ATA_DFLAG_AN = (1 << 7), /* AN configured */
ca77329f
KCA		 139 ATA_DFLAG_HIPM = (1 << 8), /* device supports HIPM */
140 ATA_DFLAG_DIPM = (1 << 9), /* device supports DIPM */
2557164e 141 ATA_DFLAG_CFG_MASK = (1 << 12) - 1,
949b38af 142
2557164e
KCA		 143 ATA_DFLAG_PIO = (1 << 12), /* device limited to PIO mode */
144 ATA_DFLAG_NCQ_OFF = (1 << 13), /* device limited to non-NCQ mode */
145 ATA_DFLAG_SPUNDOWN = (1 << 14), /* XXX: for spindown_compat */
054a5fba 146 ATA_DFLAG_SLEEPING = (1 << 15), /* device is sleeping */
00115e0f 147 ATA_DFLAG_DUBIOUS_XFER = (1 << 16), /* data transfer not verified */
f20ded38 148 ATA_DFLAG_INIT_MASK = (1 << 24) - 1,
1da177e4 149
f20ded38
TH		 150 ATA_DFLAG_DETACH = (1 << 24),
151 ATA_DFLAG_DETACHED = (1 << 25),
abdda733 152
1da177e4
LT		 153 ATA_DEV_UNKNOWN = 0, /* unknown device */
154 ATA_DEV_ATA = 1, /* ATA device */
155 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */
156 ATA_DEV_ATAPI = 3, /* ATAPI device */
157 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */
e0a71752
TH		 158 ATA_DEV_PMP = 5, /* SATA port multiplier */
159 ATA_DEV_PMP_UNSUP = 6, /* SATA port multiplier (unsupported) */
160 ATA_DEV_SEMB = 7, /* SEMB */
161 ATA_DEV_SEMB_UNSUP = 8, /* SEMB (unsupported) */
162 ATA_DEV_NONE = 9, /* no device */
1da177e4 163
0c88758b
TH		 164 /* struct ata_link flags */
165 ATA_LFLAG_HRST_TO_RESUME = (1 << 0), /* hardreset to resume link */
166 ATA_LFLAG_SKIP_D2H_BSY = (1 << 1), /* can't wait for the first D2H
167 * Register FIS clearing BSY */
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 */
222 ATA_QCFLAG_SG = (1 << 1), /* have s/g table? */
223 ATA_QCFLAG_SINGLE = (1 << 2), /* no s/g, just a single buffer */
1da177e4 224 ATA_QCFLAG_DMAMAP = ATA_QCFLAG_SG | ATA_QCFLAG_SINGLE,
27197367 225 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */
e61e0672 226 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */
da917d69 227 ATA_QCFLAG_CLEAR_EXCL = (1 << 5), /* clear excl_link on completion */
e027bd36 228 ATA_QCFLAG_QUIET = (1 << 6), /* don't report device error */
e61e0672 229
9ec957f2
TH		 230 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */
231 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */
232 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */
1da177e4 233
4e5ec5db 234 /* host set flags */
cca3974e 235 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */
ecef7253 236 ATA_HOST_STARTED = (1 << 1), /* Host started */
9bec2e38 237
b8b275ef
TH		 238 /* bits 24:31 of host->flags are reserved for LLD specific flags */
239
1da177e4 240 /* various lengths of time */
8d238e01
AC		 241 ATA_TMOUT_BOOT = 30 * HZ, /* heuristic */
242 ATA_TMOUT_BOOT_QUICK = 7 * HZ, /* heuristic */
a2a7a662
TH		 243 ATA_TMOUT_INTERNAL = 30 * HZ,
244 ATA_TMOUT_INTERNAL_QUICK = 5 * HZ,
1da177e4 245
88ff6eaf
TH		 246 /* FIXME: GoVault needs 2s but we can't afford that without
247 * parallel probing. 800ms is enough for iVDR disk
248 * HHD424020F7SV00. Increase to 2secs when parallel probing
249 * is in place.
250 */
251 ATA_TMOUT_FF_WAIT = 4 * HZ / 5,
252
1da177e4
LT		 253 /* ATA bus states */
254 BUS_UNKNOWN = 0,
255 BUS_DMA = 1,
256 BUS_IDLE = 2,
257 BUS_NOINTR = 3,
258 BUS_NODATA = 4,
259 BUS_TIMER = 5,
260 BUS_PIO = 6,
261 BUS_EDD = 7,
262 BUS_IDENTIFY = 8,
263 BUS_PACKET = 9,
264
265 /* SATA port states */
266 PORT_UNKNOWN = 0,
267 PORT_ENABLED = 1,
268 PORT_DISABLED = 2,
269
270 /* encoding various smaller bitmaps into a single
7dc951ae 271 * unsigned long bitmap
1da177e4 272 */
70cd071e
TH		 273 ATA_NR_PIO_MODES = 7,
274 ATA_NR_MWDMA_MODES = 5,
275 ATA_NR_UDMA_MODES = 8,
1da7b0d0
TH		 276
277 ATA_SHIFT_PIO = 0,
70cd071e
TH		 278 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_NR_PIO_MODES,
279 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_NR_MWDMA_MODES,
280
cedc9a47
JG		 281 /* size of buffer to pad xfers ending on unaligned boundaries */
282 ATA_DMA_PAD_SZ = 4,
283 ATA_DMA_PAD_BUF_SZ = ATA_DMA_PAD_SZ * ATA_MAX_QUEUE,
949b38af 284
0c247c55
TH		 285 /* ering size */
286 ATA_ERING_SIZE = 32,
287
31cc23b3
TH		 288 /* return values for ->qc_defer */
289 ATA_DEFER_LINK = 1,
290 ATA_DEFER_PORT = 2,
291
f3e81b19
TH		 292 /* desc_len for ata_eh_info and context */
293 ATA_EH_DESC_LEN = 80,
294
9be1e979
TH		 295 /* reset / recovery action types */
296 ATA_EH_REVALIDATE = (1 << 0),
297 ATA_EH_SOFTRESET = (1 << 1),
298 ATA_EH_HARDRESET = (1 << 2),
f9df58cb 299 ATA_EH_ENABLE_LINK = (1 << 3),
9be1e979
TH		 300
301 ATA_EH_RESET_MASK = ATA_EH_SOFTRESET | ATA_EH_HARDRESET,
9666f400 302 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE,
9be1e979 303
f3e81b19 304 /* ata_eh_info->flags */
abdda733 305 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */
13abf50d 306 ATA_EHI_RESUME_LINK = (1 << 1), /* resume link (reset modifier) */
1cdaf534
TH		 307 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */
308 ATA_EHI_QUIET = (1 << 3), /* be quiet */
ca77329f 309 ATA_EHI_LPM = (1 << 4), /* link power management action */
abdda733 310
0d64a233
TH		 311 ATA_EHI_DID_SOFTRESET = (1 << 16), /* already soft-reset this port */
312 ATA_EHI_DID_HARDRESET = (1 << 17), /* already soft-reset this port */
313 ATA_EHI_PRINTINFO = (1 << 18), /* print configuration info */
314 ATA_EHI_SETMODE = (1 << 19), /* configure transfer mode */
315 ATA_EHI_POST_SETMODE = (1 << 20), /* revaildating after setmode */
f3e81b19 316
0d64a233 317 ATA_EHI_DID_RESET = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET,
13abf50d
TH		 318 ATA_EHI_RESET_MODIFIER_MASK = ATA_EHI_RESUME_LINK,
319
a1e10f7e
TH		 320 /* max tries if error condition is still set after ->error_handler */
321 ATA_EH_MAX_TRIES = 5,
ad9e2762 322
14d2bac1
TH		 323 /* how hard are we gonna try to probe/recover devices */
324 ATA_PROBE_MAX_TRIES = 3,
022bdb07 325 ATA_EH_DEV_TRIES = 3,
e0a71752
TH		 326 ATA_EH_PMP_TRIES = 5,
327 ATA_EH_PMP_LINK_TRIES = 3,
328
329 SATA_PMP_SCR_TIMEOUT = 250,
f5914a46 330
93590859
AC		 331 /* Horkage types. May be set by libata or controller on drives
332 (some horkage may be drive/controller pair dependant */
333
334 ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */
6919a0a6
AC		 335 ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */
336 ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */
18d6e9d5 337 ATA_HORKAGE_MAX_SEC_128 = (1 << 3), /* Limit max sects to 128 */
16c55b03 338 ATA_HORKAGE_BROKEN_HPA = (1 << 4), /* Broken HPA */
e31e8531 339 ATA_HORKAGE_SKIP_PM = (1 << 5), /* Skip PM operations */
93328e11 340 ATA_HORKAGE_HPA_SIZE = (1 << 6), /* native size off by one */
ca77329f 341 ATA_HORKAGE_IPM = (1 << 7), /* Link PM problems */
6bbfd53d 342 ATA_HORKAGE_IVB = (1 << 8), /* cbl det validity bit bugs */
2d3b8eea 343 ATA_HORKAGE_STUCK_ERR = (1 << 9), /* stuck ERR on next PACKET */
b3a70601 344
2dcb407e 345 /* DMA mask for user DMA control: User visible values; DO NOT
b3a70601
AC		 346 renumber */
347 ATA_DMA_MASK_ATA = (1 << 0), /* DMA on ATA Disk */
348 ATA_DMA_MASK_ATAPI = (1 << 1), /* DMA on ATAPI */
349 ATA_DMA_MASK_CFA = (1 << 2), /* DMA on CF Card */
ceb0c642
TH		 350
351 /* ATAPI command types */
352 ATAPI_READ = 0, /* READs */
353 ATAPI_WRITE = 1, /* WRITEs */
354 ATAPI_READ_CD = 2, /* READ CD [MSF] */
355 ATAPI_MISC = 3, /* the rest */
1da177e4
LT		 356};
357
7dc951ae
TH		 358enum ata_xfer_mask {
359 ATA_MASK_PIO = ((1LU << ATA_NR_PIO_MODES) - 1)
360 << ATA_SHIFT_PIO,
361 ATA_MASK_MWDMA = ((1LU << ATA_NR_MWDMA_MODES) - 1)
362 << ATA_SHIFT_MWDMA,
363 ATA_MASK_UDMA = ((1LU << ATA_NR_UDMA_MODES) - 1)
364 << ATA_SHIFT_UDMA,
365};
366
14be71f4 367enum hsm_task_states {
c56b14d2 368 HSM_ST_IDLE, /* no command on going */
71527647
AL		 369 HSM_ST_FIRST, /* (waiting the device to)
370 write CDB or first data block */
c56b14d2
AL		 371 HSM_ST, /* (waiting the device to) transfer data */
372 HSM_ST_LAST, /* (waiting the device to) complete command */
c56b14d2 373 HSM_ST_ERR, /* error */
1da177e4
LT		 374};
375
a7dac447 376enum ata_completion_errors {
11a56d24
TH		 377 AC_ERR_DEV = (1 << 0), /* device reported error */
378 AC_ERR_HSM = (1 << 1), /* host state machine violation */
379 AC_ERR_TIMEOUT = (1 << 2), /* timeout */
380 AC_ERR_MEDIA = (1 << 3), /* media error */
381 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */
382 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */
383 AC_ERR_SYSTEM = (1 << 6), /* system error */
384 AC_ERR_INVALID = (1 << 7), /* invalid argument */
385 AC_ERR_OTHER = (1 << 8), /* unknown */
55a8e2c8 386 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */
5335b729 387 AC_ERR_NCQ = (1 << 10), /* marker for offending NCQ qc */
a7dac447
JG		 388};
389
1da177e4
LT		 390/* forward declarations */
391struct scsi_device;
392struct ata_port_operations;
393struct ata_port;
cc0680a5 394struct ata_link;
1da177e4
LT		 395struct ata_queued_cmd;
396
397/* typedefs */
77853bf2 398typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
cc0680a5
TH		 399typedef int (*ata_prereset_fn_t)(struct ata_link *link, unsigned long deadline);
400typedef int (*ata_reset_fn_t)(struct ata_link *link, unsigned int *classes,
d4b2bab4 401 unsigned long deadline);
cc0680a5 402typedef void (*ata_postreset_fn_t)(struct ata_link *link, unsigned int *classes);
1da177e4 403
ca77329f
KCA		 404/*
405 * host pm policy: If you alter this, you also need to alter libata-scsi.c
406 * (for the ascii descriptions)
407 */
408enum link_pm {
409 NOT_AVAILABLE,
410 MIN_POWER,
411 MAX_PERFORMANCE,
412 MEDIUM_POWER,
413};
414extern struct class_device_attribute class_device_attr_link_power_management_policy;
415
1da177e4 416struct ata_ioports {
0d5ff566
TH		 417 void __iomem *cmd_addr;
418 void __iomem *data_addr;
419 void __iomem *error_addr;
420 void __iomem *feature_addr;
421 void __iomem *nsect_addr;
422 void __iomem *lbal_addr;
423 void __iomem *lbam_addr;
424 void __iomem *lbah_addr;
425 void __iomem *device_addr;
426 void __iomem *status_addr;
427 void __iomem *command_addr;
428 void __iomem *altstatus_addr;
429 void __iomem *ctl_addr;
430 void __iomem *bmdma_addr;
431 void __iomem *scr_addr;
1da177e4
LT		 432};
433
cca3974e 434struct ata_host {
1da177e4
LT		 435 spinlock_t lock;
436 struct device *dev;
0d5ff566 437 void __iomem * const *iomap;
1da177e4
LT		 438 unsigned int n_ports;
439 void *private_data;
057ace5e 440 const struct ata_port_operations *ops;
5444a6f4 441 unsigned long flags;
fafbae87
TH		 442#ifdef CONFIG_ATA_ACPI
443 acpi_handle acpi_handle;
444#endif
032af1ce 445 struct ata_port *simplex_claimed; /* channel owning the DMA */
f0eb62b8 446 struct ata_port *ports[0];
1da177e4
LT		 447};
448
449struct ata_queued_cmd {
450 struct ata_port *ap;
451 struct ata_device *dev;
452
453 struct scsi_cmnd *scsicmd;
454 void (*scsidone)(struct scsi_cmnd *);
455
456 struct ata_taskfile tf;
457 u8 cdb[ATAPI_CDB_LEN];
458
459 unsigned long flags; /* ATA_QCFLAG_xxx */
460 unsigned int tag;
461 unsigned int n_elem;
87260216 462 unsigned int n_iter;
cedc9a47 463 unsigned int orig_n_elem;
1da177e4
LT		 464
465 int dma_dir;
466
cedc9a47 467 unsigned int pad_len;
5a5dbd18 468 unsigned int sect_size;
cedc9a47 469
1da177e4
LT		 470 unsigned int nbytes;
471 unsigned int curbytes;
472
87260216 473 struct scatterlist *cursg;
1da177e4
LT		 474 unsigned int cursg_ofs;
475
476 struct scatterlist sgent;
cedc9a47 477 struct scatterlist pad_sgent;
1da177e4
LT		 478 void *buf_virt;
479
cedc9a47
JG		 480 /* DO NOT iterate over __sg manually, use ata_for_each_sg() */
481 struct scatterlist *__sg;
1da177e4 482
a22e2eb0 483 unsigned int err_mask;
e61e0672 484 struct ata_taskfile result_tf;
1da177e4
LT		 485 ata_qc_cb_t complete_fn;
486
1da177e4 487 void *private_data;
1c50dc83 488 void *lldd_task;
1da177e4
LT		 489};
490
cca3974e 491struct ata_port_stats {
1da177e4
LT		 492 unsigned long unhandled_irq;
493 unsigned long idle_irq;
494 unsigned long rw_reqbuf;
495};
496
0c247c55 497struct ata_ering_entry {
3884f7b0 498 unsigned int eflags;
0c247c55
TH		 499 unsigned int err_mask;
500 u64 timestamp;
501};
502
503struct ata_ering {
504 int cursor;
505 struct ata_ering_entry ring[ATA_ERING_SIZE];
506};
507
1da177e4 508struct ata_device {
9af5c9c9 509 struct ata_link *link;
72fa4b74 510 unsigned int devno; /* 0 or 1 */
1da177e4 511 unsigned long flags; /* ATA_DFLAG_xxx */
75683fe7 512 unsigned int horkage; /* List of broken features */
3edebac4 513 struct scsi_device *sdev; /* attached SCSI device */
fafbae87
TH		 514#ifdef CONFIG_ATA_ACPI
515 acpi_handle acpi_handle;
398e0782 516 union acpi_object *gtf_cache;
fafbae87 517#endif
72fa4b74
TH		 518 /* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */
519 u64 n_sectors; /* size of device, if ATA */
1da177e4 520 unsigned int class; /* ATA_DEV_xxx */
e0a71752
TH		 521
522 union {
523 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
524 u32 gscr[SATA_PMP_GSCR_DWORDS]; /* PMP GSCR block */
525 };
526
1da177e4
LT		 527 u8 pio_mode;
528 u8 dma_mode;
529 u8 xfer_mode;
530 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
531
8cbd6df1
AL		 532 unsigned int multi_count; /* sectors count for
533 READ/WRITE MULTIPLE */
b00eec1d 534 unsigned int max_sectors; /* per-device max sectors */
6e7846e9 535 unsigned int cdb_len;
8bf62ece 536
acf356b1 537 /* per-dev xfer mask */
7dc951ae
TH		 538 unsigned long pio_mask;
539 unsigned long mwdma_mask;
540 unsigned long udma_mask;
acf356b1 541
8bf62ece
AL		 542 /* for CHS addressing */
543 u16 cylinders; /* Number of cylinders */
544 u16 heads; /* Number of heads */
545 u16 sectors; /* Number of sectors per track */
0c247c55
TH		 546
547 /* error history */
548 struct ata_ering ering;
7d47e8d4 549 int spdn_cnt;
1da177e4
LT		 550};
551
72fa4b74
TH		 552/* Offset into struct ata_device. Fields above it are maintained
553 * acress device init. Fields below are zeroed.
554 */
555#define ATA_DEVICE_CLEAR_OFFSET offsetof(struct ata_device, n_sectors)
556
f3e81b19
TH		 557struct ata_eh_info {
558 struct ata_device *dev; /* offending device */
559 u32 serror; /* SError from LLDD */
560 unsigned int err_mask; /* port-wide err_mask */
561 unsigned int action; /* ATA_EH_* action mask */
47005f25 562 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */
f3e81b19 563 unsigned int flags; /* ATA_EHI_* flags */
abdda733 564
abdda733
TH		 565 unsigned int probe_mask;
566
f3e81b19
TH		 567 char desc[ATA_EH_DESC_LEN];
568 int desc_len;
569};
570
571struct ata_eh_context {
572 struct ata_eh_info i;
573 int tries[ATA_MAX_DEVICES];
abdda733
TH		 574 unsigned int classes[ATA_MAX_DEVICES];
575 unsigned int did_probe_mask;
00115e0f
TH		 576 unsigned int saved_ncq_enabled;
577 u8 saved_xfer_mode[ATA_MAX_DEVICES];
f3e81b19
TH		 578};
579
64578a3d
TH		 580struct ata_acpi_drive
581{
582 u32 pio;
583 u32 dma;
584} __packed;
585
586struct ata_acpi_gtm {
587 struct ata_acpi_drive drive[2];
588 u32 flags;
589} __packed;
590
9af5c9c9
TH		 591struct ata_link {
592 struct ata_port *ap;
8989805d 593 int pmp; /* port multiplier port # */
9af5c9c9
TH		 594
595 unsigned int active_tag; /* active tag on this link */
596 u32 sactive; /* active NCQ commands */
597
0c88758b
TH		 598 unsigned int flags; /* ATA_LFLAG_xxx */
599
9af5c9c9
TH		 600 unsigned int hw_sata_spd_limit;
601 unsigned int sata_spd_limit;
602 unsigned int sata_spd; /* current SATA PHY speed */
603
604 /* record runtime error info, protected by host_set lock */
605 struct ata_eh_info eh_info;
606 /* EH context */
607 struct ata_eh_context eh_context;
608
609 struct ata_device device[ATA_MAX_DEVICES];
610};
611
1da177e4 612struct ata_port {
cca3974e 613 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */
057ace5e 614 const struct ata_port_operations *ops;
ba6a1308 615 spinlock_t *lock;
1da177e4 616 unsigned long flags; /* ATA_FLAG_xxx */
b51e9e5d 617 unsigned int pflags; /* ATA_PFLAG_xxx */
44877b4e
TH		 618 unsigned int print_id; /* user visible unique port ID */
619 unsigned int port_no; /* 0 based port no. inside the host */
1da177e4
LT		 620
621 struct ata_prd *prd; /* our SG list */
622 dma_addr_t prd_dma; /* and its DMA mapping */
623
cedc9a47
JG		 624 void *pad; /* array of DMA pad buffers */
625 dma_addr_t pad_dma;
626
1da177e4
LT		 627 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
628
629 u8 ctl; /* cache of ATA control register */
630 u8 last_ctl; /* Cache last written value */
1da177e4
LT		 631 unsigned int pio_mask;
632 unsigned int mwdma_mask;
633 unsigned int udma_mask;
634 unsigned int cbl; /* cable type; ATA_CBL_xxx */
1da177e4
LT		 635
636 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
6cec4a39 637 unsigned long qc_allocated;
dedaf2b0 638 unsigned int qc_active;
da917d69 639 int nr_active_links; /* #links with active qcs */
dedaf2b0 640
9af5c9c9 641 struct ata_link link; /* host default link */
1da177e4 642
8989805d
TH		 643 int nr_pmp_links; /* nr of available PMP links */
644 struct ata_link *pmp_link; /* array of PMP links */
da917d69 645 struct ata_link *excl_link; /* for PMP qc exclusion */
8989805d 646
cca3974e
JG		 647 struct ata_port_stats stats;
648 struct ata_host *host;
2f1f610b 649 struct device *dev;
1da177e4 650
65f27f38 651 void *port_task_data;
52bad64d
DH		 652 struct delayed_work port_task;
653 struct delayed_work hotplug_task;
3b01b8af 654 struct work_struct scsi_rescan_task;
86e45b6b 655
14be71f4 656 unsigned int hsm_task_state;
1da177e4 657
bfd60579 658 u32 msg_enable;
a72ec4ce 659 struct list_head eh_done_q;
c6cf9e99 660 wait_queue_head_t eh_wait_q;
a1e10f7e 661 int eh_tries;
bfd60579 662
500530f6
TH		 663 pm_message_t pm_mesg;
664 int *pm_result;
ca77329f 665 enum link_pm pm_policy;
500530f6 666
5ddf24c5
TH		 667 struct timer_list fastdrain_timer;
668 unsigned long fastdrain_cnt;
669
1da177e4 670 void *private_data;
fe635c7e 671
fafbae87
TH		 672#ifdef CONFIG_ATA_ACPI
673 acpi_handle acpi_handle;
c05e6ff0 674 struct ata_acpi_gtm __acpi_init_gtm; /* use ata_acpi_init_gtm() */
fafbae87 675#endif
fe635c7e 676 u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */
1da177e4
LT		 677};
678
679struct ata_port_operations {
cd0d3bbc 680 void (*dev_config) (struct ata_device *);
1da177e4
LT		 681
682 void (*set_piomode) (struct ata_port *, struct ata_device *);
683 void (*set_dmamode) (struct ata_port *, struct ata_device *);
a76b62ca 684 unsigned long (*mode_filter) (struct ata_device *, unsigned long);
1da177e4 685
057ace5e 686 void (*tf_load) (struct ata_port *ap, const struct ata_taskfile *tf);
1da177e4
LT		 687 void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf);
688
057ace5e 689 void (*exec_command)(struct ata_port *ap, const struct ata_taskfile *tf);
1da177e4
LT		 690 u8 (*check_status)(struct ata_port *ap);
691 u8 (*check_altstatus)(struct ata_port *ap);
1da177e4
LT		 692 void (*dev_select)(struct ata_port *ap, unsigned int device);
693
c19ba8af 694 void (*phy_reset) (struct ata_port *ap); /* obsolete */
0260731f 695 int (*set_mode) (struct ata_link *link, struct ata_device **r_failed_dev);
c19ba8af 696
be0d18df
AC		 697 int (*cable_detect) (struct ata_port *ap);
698
b229a7b0 699 int (*check_atapi_dma) (struct ata_queued_cmd *qc);
1da177e4
LT		 700
701 void (*bmdma_setup) (struct ata_queued_cmd *qc);
702 void (*bmdma_start) (struct ata_queued_cmd *qc);
703
a6b2c5d4
AC		 704 void (*data_xfer) (struct ata_device *, unsigned char *, unsigned int, int);
705
31cc23b3 706 int (*qc_defer) (struct ata_queued_cmd *qc);
1da177e4 707 void (*qc_prep) (struct ata_queued_cmd *qc);
9a3d9eb0 708 unsigned int (*qc_issue) (struct ata_queued_cmd *qc);
1da177e4 709
e0a71752
TH		 710 /* port multiplier */
711 void (*pmp_attach) (struct ata_port *ap);
712 void (*pmp_detach) (struct ata_port *ap);
e0a71752 713
9ec957f2
TH		 714 /* Error handlers. ->error_handler overrides ->eng_timeout and
715 * indicates that new-style EH is in place.
716 */
717 void (*eng_timeout) (struct ata_port *ap); /* obsolete */
718
719 void (*freeze) (struct ata_port *ap);
720 void (*thaw) (struct ata_port *ap);
721 void (*error_handler) (struct ata_port *ap);
722 void (*post_internal_cmd) (struct ata_queued_cmd *qc);
1da177e4 723
7d12e780 724 irq_handler_t irq_handler;
1da177e4 725 void (*irq_clear) (struct ata_port *);
83625006 726 u8 (*irq_on) (struct ata_port *);
1da177e4 727
da3dbb17
TH		 728 int (*scr_read) (struct ata_port *ap, unsigned int sc_reg, u32 *val);
729 int (*scr_write) (struct ata_port *ap, unsigned int sc_reg, u32 val);
1da177e4 730
500530f6
TH		 731 int (*port_suspend) (struct ata_port *ap, pm_message_t mesg);
732 int (*port_resume) (struct ata_port *ap);
ca77329f
KCA		 733 int (*enable_pm) (struct ata_port *ap, enum link_pm policy);
734 void (*disable_pm) (struct ata_port *ap);
1da177e4
LT		 735 int (*port_start) (struct ata_port *ap);
736 void (*port_stop) (struct ata_port *ap);
737
cca3974e 738 void (*host_stop) (struct ata_host *host);
1da177e4 739
b73fc89f 740 void (*bmdma_stop) (struct ata_queued_cmd *qc);
1da177e4
LT		 741 u8 (*bmdma_status) (struct ata_port *ap);
742};
743
744struct ata_port_info {
d0be4a7d 745 struct scsi_host_template *sht;
cca3974e 746 unsigned long flags;
0c88758b 747 unsigned long link_flags;
1da177e4
LT		 748 unsigned long pio_mask;
749 unsigned long mwdma_mask;
750 unsigned long udma_mask;
057ace5e 751 const struct ata_port_operations *port_ops;
21b0ad4f 752 irq_handler_t irq_handler;
e99f8b5e 753 void *private_data;
1da177e4
LT		 754};
755
452503f9
AC		 756struct ata_timing {
757 unsigned short mode; /* ATA mode */
758 unsigned short setup; /* t1 */
759 unsigned short act8b; /* t2 for 8-bit I/O */
760 unsigned short rec8b; /* t2i for 8-bit I/O */
761 unsigned short cyc8b; /* t0 for 8-bit I/O */
762 unsigned short active; /* t2 or tD */
763 unsigned short recover; /* t2i or tK */
764 unsigned short cycle; /* t0 */
765 unsigned short udma; /* t2CYCTYP/2 */
766};
767
2dcb407e 768#define FIT(v, vmin, vmax) max_t(short, min_t(short, v, vmax), vmin)
1da177e4 769
e9c83914
TH		 770extern const unsigned long sata_deb_timing_normal[];
771extern const unsigned long sata_deb_timing_hotplug[];
772extern const unsigned long sata_deb_timing_long[];
773
dd5b06c4 774extern const struct ata_port_operations ata_dummy_port_ops;
21b0ad4f 775extern const struct ata_port_info ata_dummy_port_info;
dd5b06c4 776
e9c83914
TH		 777static inline const unsigned long *
778sata_ehc_deb_timing(struct ata_eh_context *ehc)
779{
780 if (ehc->i.flags & ATA_EHI_HOTPLUGGED)
781 return sata_deb_timing_hotplug;
782 else
783 return sata_deb_timing_normal;
784}
d7bb4cc7 785
dd5b06c4
TH		 786static inline int ata_port_is_dummy(struct ata_port *ap)
787{
788 return ap->ops == &ata_dummy_port_ops;
789}
790
936fd732 791extern void sata_print_link_status(struct ata_link *link);
1da177e4 792extern void ata_port_probe(struct ata_port *);
1da177e4 793extern void ata_bus_reset(struct ata_port *ap);
936fd732
TH		 794extern int sata_set_spd(struct ata_link *link);
795extern int sata_link_debounce(struct ata_link *link,
796 const unsigned long *params, unsigned long deadline);
797extern int sata_link_resume(struct ata_link *link, const unsigned long *params,
798 unsigned long deadline);
cc0680a5
TH		 799extern int ata_std_prereset(struct ata_link *link, unsigned long deadline);
800extern int ata_std_softreset(struct ata_link *link, unsigned int *classes,
d4b2bab4 801 unsigned long deadline);
cc0680a5
TH		 802extern int sata_link_hardreset(struct ata_link *link,
803 const unsigned long *timing, unsigned long deadline);
804extern int sata_std_hardreset(struct ata_link *link, unsigned int *class,
d4b2bab4 805 unsigned long deadline);
cc0680a5 806extern void ata_std_postreset(struct ata_link *link, unsigned int *classes);
1da177e4
LT		 807extern void ata_port_disable(struct ata_port *);
808extern void ata_std_ports(struct ata_ioports *ioaddr);
2855568b 809
f3187195 810extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports);
f5cda257
TH		 811extern struct ata_host *ata_host_alloc_pinfo(struct device *dev,
812 const struct ata_port_info * const * ppi, int n_ports);
ecef7253 813extern int ata_host_start(struct ata_host *host);
f3187195
TH		 814extern int ata_host_register(struct ata_host *host,
815 struct scsi_host_template *sht);
f5cda257
TH		 816extern int ata_host_activate(struct ata_host *host, int irq,
817 irq_handler_t irq_handler, unsigned long irq_flags,
818 struct scsi_host_template *sht);
0529c159 819extern void ata_host_detach(struct ata_host *host);
cca3974e
JG		 820extern void ata_host_init(struct ata_host *, struct device *,
821 unsigned long, const struct ata_port_operations *);
193515d5 822extern int ata_scsi_detect(struct scsi_host_template *sht);
1da177e4
LT		 823extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
824extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *));
80289167 825extern void ata_sas_port_destroy(struct ata_port *);
cca3974e 826extern struct ata_port *ata_sas_port_alloc(struct ata_host *,
80289167
BK		 827 struct ata_port_info *, struct Scsi_Host *);
828extern int ata_sas_port_init(struct ata_port *);
829extern int ata_sas_port_start(struct ata_port *ap);
830extern void ata_sas_port_stop(struct ata_port *ap);
831extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *);
832extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
833 struct ata_port *ap);
1da177e4 834extern unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc);
936fd732
TH		 835extern int sata_scr_valid(struct ata_link *link);
836extern int sata_scr_read(struct ata_link *link, int reg, u32 *val);
837extern int sata_scr_write(struct ata_link *link, int reg, u32 val);
838extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val);
839extern int ata_link_online(struct ata_link *link);
840extern int ata_link_offline(struct ata_link *link);
6ffa01d8 841#ifdef CONFIG_PM
cca3974e
JG		 842extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg);
843extern void ata_host_resume(struct ata_host *host);
6ffa01d8 844#endif
67846b30 845extern int ata_ratelimit(void);
d1adc1bb
TH		 846extern int ata_busy_sleep(struct ata_port *ap,
847 unsigned long timeout_pat, unsigned long timeout);
88ff6eaf 848extern void ata_wait_after_reset(struct ata_port *ap, unsigned long deadline);
d4b2bab4 849extern int ata_wait_ready(struct ata_port *ap, unsigned long deadline);
65f27f38 850extern void ata_port_queue_task(struct ata_port *ap, work_func_t fn,
86e45b6b 851 void *data, unsigned long delay);
c22daff4
TH		 852extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
853 unsigned long interval_msec,
854 unsigned long timeout_msec);
3f19859e
TH		 855extern unsigned int ata_dev_try_classify(struct ata_device *dev, int present,
856 u8 *r_err);
67846b30 857
1da177e4
LT		 858/*
859 * Default driver ops implementations
860 */
057ace5e 861extern void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
1da177e4 862extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
9977126c
TH		 863extern void ata_tf_to_fis(const struct ata_taskfile *tf,
864 u8 pmp, int is_cmd, u8 *fis);
057ace5e 865extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
7dc951ae
TH		 866extern unsigned long ata_pack_xfermask(unsigned long pio_mask,
867 unsigned long mwdma_mask, unsigned long udma_mask);
868extern void ata_unpack_xfermask(unsigned long xfer_mask,
869 unsigned long *pio_mask, unsigned long *mwdma_mask,
870 unsigned long *udma_mask);
871extern u8 ata_xfer_mask2mode(unsigned long xfer_mask);
872extern unsigned long ata_xfer_mode2mask(u8 xfer_mode);
873extern int ata_xfer_mode2shift(unsigned long xfer_mode);
874extern const char *ata_mode_string(unsigned long xfer_mask);
875extern unsigned long ata_id_xfermask(const u16 *id);
2dcb407e
JG		 876extern void ata_noop_dev_select(struct ata_port *ap, unsigned int device);
877extern void ata_std_dev_select(struct ata_port *ap, unsigned int device);
1da177e4
LT		 878extern u8 ata_check_status(struct ata_port *ap);
879extern u8 ata_altstatus(struct ata_port *ap);
057ace5e 880extern void ata_exec_command(struct ata_port *ap, const struct ata_taskfile *tf);
2dcb407e
JG		 881extern int ata_port_start(struct ata_port *ap);
882extern int ata_sff_port_start(struct ata_port *ap);
883extern irqreturn_t ata_interrupt(int irq, void *dev_instance);
0d5ff566
TH		 884extern void ata_data_xfer(struct ata_device *adev, unsigned char *buf,
885 unsigned int buflen, int write_data);
886extern void ata_data_xfer_noirq(struct ata_device *adev, unsigned char *buf,
887 unsigned int buflen, int write_data);
31cc23b3 888extern int ata_std_qc_defer(struct ata_queued_cmd *qc);
d26fc955 889extern void ata_dumb_qc_prep(struct ata_queued_cmd *qc);
1da177e4 890extern void ata_qc_prep(struct ata_queued_cmd *qc);
e46834cd 891extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
9a3d9eb0 892extern unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc);
1da177e4
LT		 893extern void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf,
894 unsigned int buflen);
895extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
896 unsigned int n_elem);
057ace5e 897extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
10305f0f 898extern void ata_dev_disable(struct ata_device *adev);
6a62a04d
TH		 899extern void ata_id_string(const u16 *id, unsigned char *s,
900 unsigned int ofs, unsigned int len);
901extern void ata_id_c_string(const u16 *id, unsigned char *s,
902 unsigned int ofs, unsigned int len);
2dcb407e
JG		 903extern void ata_bmdma_setup(struct ata_queued_cmd *qc);
904extern void ata_bmdma_start(struct ata_queued_cmd *qc);
b73fc89f 905extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
1da177e4
LT		 906extern u8 ata_bmdma_status(struct ata_port *ap);
907extern void ata_bmdma_irq_clear(struct ata_port *ap);
6d97dbd7
TH		 908extern void ata_bmdma_freeze(struct ata_port *ap);
909extern void ata_bmdma_thaw(struct ata_port *ap);
f5914a46 910extern void ata_bmdma_drive_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
6d97dbd7
TH		 911 ata_reset_fn_t softreset,
912 ata_reset_fn_t hardreset,
913 ata_postreset_fn_t postreset);
914extern void ata_bmdma_error_handler(struct ata_port *ap);
915extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc);
9a1004d0
TH		 916extern int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
917 u8 status, int in_wq);
f686bcb8 918extern void ata_qc_complete(struct ata_queued_cmd *qc);
dedaf2b0
TH		 919extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active,
920 void (*finish_qc)(struct ata_queued_cmd *));
3373efd8 921extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
1da177e4
LT		 922 void (*done)(struct scsi_cmnd *));
923extern int ata_std_bios_param(struct scsi_device *sdev,
924 struct block_device *bdev,
925 sector_t capacity, int geom[]);
926extern int ata_scsi_slave_config(struct scsi_device *sdev);
83c47bcb 927extern void ata_scsi_slave_destroy(struct scsi_device *sdev);
a6e6ce8e
TH		 928extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
929 int queue_depth);
3373efd8 930extern struct ata_device *ata_dev_pair(struct ata_device *adev);
0260731f 931extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev);
83625006 932extern u8 ata_irq_on(struct ata_port *ap);
1da177e4 933
be0d18df
AC		 934extern int ata_cable_40wire(struct ata_port *ap);
935extern int ata_cable_80wire(struct ata_port *ap);
936extern int ata_cable_sata(struct ata_port *ap);
c88f90c3 937extern int ata_cable_ignore(struct ata_port *ap);
be0d18df
AC		 938extern int ata_cable_unknown(struct ata_port *ap);
939
452503f9
AC		 940/*
941 * Timing helpers
942 */
1bc4ccff
AC		 943
944extern unsigned int ata_pio_need_iordy(const struct ata_device *);
6357357c 945extern const struct ata_timing *ata_timing_find_mode(u8 xfer_mode);
452503f9
AC		 946extern int ata_timing_compute(struct ata_device *, unsigned short,
947 struct ata_timing *, int, int);
948extern void ata_timing_merge(const struct ata_timing *,
949 const struct ata_timing *, struct ata_timing *,
950 unsigned int);
a0f79b92 951extern u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle);
452503f9
AC		 952
953enum {
954 ATA_TIMING_SETUP = (1 << 0),
955 ATA_TIMING_ACT8B = (1 << 1),
956 ATA_TIMING_REC8B = (1 << 2),
957 ATA_TIMING_CYC8B = (1 << 3),
958 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
959 ATA_TIMING_CYC8B,
960 ATA_TIMING_ACTIVE = (1 << 4),
961 ATA_TIMING_RECOVER = (1 << 5),
962 ATA_TIMING_CYCLE = (1 << 6),
963 ATA_TIMING_UDMA = (1 << 7),
964 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
965 ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
966 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
967 ATA_TIMING_CYCLE | ATA_TIMING_UDMA,
968};
969
e1ddb4b6
AC		 970/* libata-acpi.c */
971#ifdef CONFIG_ATA_ACPI
c05e6ff0
TH		 972static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
973{
974 if (ap->pflags & ATA_PFLAG_INIT_GTM_VALID)
975 return &ap->__acpi_init_gtm;
976 return NULL;
977}
0d02f0b2
TH		 978int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm);
979int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *stm);
7c77fa4d
TH		 980unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev,
981 const struct ata_acpi_gtm *gtm);
021ee9a6 982int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm);
e1ddb4b6 983#else
c05e6ff0
TH		 984static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
985{
986 return NULL;
987}
7c77fa4d
TH		 988
989static inline int ata_acpi_stm(const struct ata_port *ap,
990 struct ata_acpi_gtm *stm)
991{
992 return -ENOSYS;
993}
994
995static inline int ata_acpi_gtm(const struct ata_port *ap,
996 struct ata_acpi_gtm *stm)
997{
998 return -ENOSYS;
999}
1000
1001static inline unsigned int ata_acpi_gtm_xfermask(struct ata_device *dev,
1002 const struct ata_acpi_gtm *gtm)
1003{
1004 return 0;
1005}
021ee9a6
TH		 1006
1007static inline int ata_acpi_cbl_80wire(struct ata_port *ap,
1008 const struct ata_acpi_gtm *gtm)
1009{
1010 return 0;
1011}
e1ddb4b6 1012#endif
1da177e4
LT		 1013
1014#ifdef CONFIG_PCI
2855568b
JG		 1015struct pci_dev;
1016
2dcb407e 1017extern int ata_pci_init_one(struct pci_dev *pdev,
2855568b 1018 const struct ata_port_info * const * ppi);
2dcb407e 1019extern void ata_pci_remove_one(struct pci_dev *pdev);
2855568b
JG		 1020#ifdef CONFIG_PM
1021extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg);
1022extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev);
1023extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
1024extern int ata_pci_device_resume(struct pci_dev *pdev);
1025#endif
1026extern int ata_pci_clear_simplex(struct pci_dev *pdev);
1027
1da177e4
LT		 1028struct pci_bits {
1029 unsigned int reg; /* PCI config register to read */
1030 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
1031 unsigned long mask;
1032 unsigned long val;
1033};
1034
d583bc18 1035extern int ata_pci_init_sff_host(struct ata_host *host);
1626aeb8 1036extern int ata_pci_init_bmdma(struct ata_host *host);
d583bc18
TH		 1037extern int ata_pci_prepare_sff_host(struct pci_dev *pdev,
1038 const struct ata_port_info * const * ppi,
1039 struct ata_host **r_host);
057ace5e 1040extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
7dc951ae
TH		 1041extern unsigned long ata_pci_default_filter(struct ata_device *dev,
1042 unsigned long xfer_mask);
1da177e4
LT		 1043#endif /* CONFIG_PCI */
1044
3af9a77a
TH		 1045/*
1046 * PMP
1047 */
31f88384 1048extern int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc);
3af9a77a
TH		 1049extern int sata_pmp_std_prereset(struct ata_link *link, unsigned long deadline);
1050extern int sata_pmp_std_hardreset(struct ata_link *link, unsigned int *class,
1051 unsigned long deadline);
1052extern void sata_pmp_std_postreset(struct ata_link *link, unsigned int *class);
1053extern void sata_pmp_do_eh(struct ata_port *ap,
1054 ata_prereset_fn_t prereset, ata_reset_fn_t softreset,
1055 ata_reset_fn_t hardreset, ata_postreset_fn_t postreset,
1056 ata_prereset_fn_t pmp_prereset, ata_reset_fn_t pmp_softreset,
1057 ata_reset_fn_t pmp_hardreset, ata_postreset_fn_t pmp_postreset);
1058
ece1d636
TH		 1059/*
1060 * EH
1061 */
7b70fc03 1062extern void ata_port_schedule_eh(struct ata_port *ap);
dbd82616 1063extern int ata_link_abort(struct ata_link *link);
7b70fc03 1064extern int ata_port_abort(struct ata_port *ap);
e3180499 1065extern int ata_port_freeze(struct ata_port *ap);
7d77b247 1066extern int sata_async_notification(struct ata_port *ap);
e3180499
TH		 1067
1068extern void ata_eh_freeze_port(struct ata_port *ap);
1069extern void ata_eh_thaw_port(struct ata_port *ap);
7b70fc03 1070
ece1d636
TH		 1071extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
1072extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
1073
f5914a46
TH		 1074extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
1075 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
1076 ata_postreset_fn_t postreset);
022bdb07 1077
61440db6
TH		 1078/*
1079 * printk helpers
1080 */
1081#define ata_port_printk(ap, lv, fmt, args...) \
c2e366a1 1082 printk("%sata%u: "fmt, lv, (ap)->print_id , ##args)
61440db6 1083
8989805d
TH		 1084#define ata_link_printk(link, lv, fmt, args...) do { \
1085 if ((link)->ap->nr_pmp_links) \
c2e366a1 1086 printk("%sata%u.%02u: "fmt, lv, (link)->ap->print_id, \
8989805d
TH		 1087 (link)->pmp , ##args); \
1088 else \
c2e366a1 1089 printk("%sata%u: "fmt, lv, (link)->ap->print_id , ##args); \
8989805d 1090 } while(0)
9af5c9c9 1091
61440db6 1092#define ata_dev_printk(dev, lv, fmt, args...) \
c2e366a1 1093 printk("%sata%u.%02u: "fmt, lv, (dev)->link->ap->print_id, \
8989805d 1094 (dev)->link->pmp + (dev)->devno , ##args)
1da177e4 1095
f3e81b19
TH		 1096/*
1097 * ata_eh_info helpers
1098 */
cb94c1cf
TH		 1099extern void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...)
1100 __attribute__ ((format (printf, 2, 3)));
1101extern void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...)
1102 __attribute__ ((format (printf, 2, 3)));
b64bbc39 1103extern void ata_ehi_clear_desc(struct ata_eh_info *ehi);
f3e81b19 1104
f8f1e1cc 1105static inline void ata_ehi_schedule_probe(struct ata_eh_info *ehi)
084fe639 1106{
f8f1e1cc 1107 ehi->flags |= ATA_EHI_RESUME_LINK;
084fe639
TH		 1108 ehi->action |= ATA_EH_SOFTRESET;
1109 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
1110}
1111
c0b6c037
TH		 1112static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
1113{
f8f1e1cc
TH		 1114 ata_ehi_schedule_probe(ehi);
1115 ehi->flags |= ATA_EHI_HOTPLUGGED;
f9df58cb 1116 ehi->action |= ATA_EH_ENABLE_LINK;
c0b6c037
TH		 1117 ehi->err_mask |= AC_ERR_ATA_BUS;
1118}
1119
cbcdd875
TH		 1120/*
1121 * port description helpers
1122 */
1123extern void ata_port_desc(struct ata_port *ap, const char *fmt, ...)
1124 __attribute__ ((format (printf, 2, 3)));
1125#ifdef CONFIG_PCI
1126extern void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset,
1127 const char *name);
1128#endif
1129
61440db6
TH		 1130/*
1131 * qc helpers
1132 */
cc1887f3
TH		 1133static inline struct scatterlist *
1134ata_qc_first_sg(struct ata_queued_cmd *qc)
1135{
87260216 1136 qc->n_iter = 0;
cc1887f3
TH		 1137 if (qc->n_elem)
1138 return qc->__sg;
1139 if (qc->pad_len)
1140 return &qc->pad_sgent;
1141 return NULL;
1142}
1143
cedc9a47
JG		 1144static inline struct scatterlist *
1145ata_qc_next_sg(struct scatterlist *sg, struct ata_queued_cmd *qc)
1146{
1147 if (sg == &qc->pad_sgent)
1148 return NULL;
87260216
JA		 1149 if (++qc->n_iter < qc->n_elem)
1150 return sg_next(sg);
cc1887f3
TH		 1151 if (qc->pad_len)
1152 return &qc->pad_sgent;
1153 return NULL;
cedc9a47
JG		 1154}
1155
1156#define ata_for_each_sg(sg, qc) \
cc1887f3 1157 for (sg = ata_qc_first_sg(qc); sg; sg = ata_qc_next_sg(sg, qc))
cedc9a47 1158
1da177e4
LT		 1159static inline unsigned int ata_tag_valid(unsigned int tag)
1160{
1161 return (tag < ATA_MAX_QUEUE) ? 1 : 0;
1162}
1163
2ab7db1f
TH		 1164static inline unsigned int ata_tag_internal(unsigned int tag)
1165{
1166 return tag == ATA_MAX_QUEUE - 1;
1167}
1168
5806db22
TH		 1169/*
1170 * device helpers
1171 */
e1211e3f 1172static inline unsigned int ata_class_enabled(unsigned int class)
597afd21 1173{
e0a71752
TH		 1174 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI ||
1175 class == ATA_DEV_PMP || class == ATA_DEV_SEMB;
597afd21
TH		 1176}
1177
e1211e3f 1178static inline unsigned int ata_class_disabled(unsigned int class)
1da177e4 1179{
e0a71752
TH		 1180 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP ||
1181 class == ATA_DEV_PMP_UNSUP || class == ATA_DEV_SEMB_UNSUP;
e1211e3f
TH		 1182}
1183
002c8054
TH		 1184static inline unsigned int ata_class_absent(unsigned int class)
1185{
1186 return !ata_class_enabled(class) && !ata_class_disabled(class);
1187}
1188
e1211e3f
TH		 1189static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
1190{
1191 return ata_class_enabled(dev->class);
1192}
1193
1194static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
1195{
1196 return ata_class_disabled(dev->class);
1da177e4
LT		 1197}
1198
002c8054
TH		 1199static inline unsigned int ata_dev_absent(const struct ata_device *dev)
1200{
1201 return ata_class_absent(dev->class);
1202}
1203
5806db22 1204/*
f58229f8 1205 * link helpers
5806db22 1206 */
8989805d
TH		 1207static inline int ata_is_host_link(const struct ata_link *link)
1208{
1209 return link == &link->ap->link;
1210}
1211
f58229f8 1212static inline int ata_link_max_devices(const struct ata_link *link)
5806db22 1213{
8989805d 1214 if (ata_is_host_link(link) && link->ap->flags & ATA_FLAG_SLAVE_POSS)
5806db22
TH		 1215 return 2;
1216 return 1;
1217}
1218
da917d69
TH		 1219static inline int ata_link_active(struct ata_link *link)
1220{
1221 return ata_tag_valid(link->active_tag) || link->sactive;
1222}
1223
8989805d
TH		 1224static inline struct ata_link *ata_port_first_link(struct ata_port *ap)
1225{
1226 if (ap->nr_pmp_links)
1227 return ap->pmp_link;
1228 return &ap->link;
1229}
1230
1231static inline struct ata_link *ata_port_next_link(struct ata_link *link)
1232{
1233 struct ata_port *ap = link->ap;
1234
1235 if (link == &ap->link) {
1236 if (!ap->nr_pmp_links)
1237 return NULL;
1238 return ap->pmp_link;
1239 }
1240
1241 if (++link - ap->pmp_link < ap->nr_pmp_links)
1242 return link;
1243 return NULL;
1244}
1245
1246#define __ata_port_for_each_link(lk, ap) \
1247 for ((lk) = &(ap)->link; (lk); (lk) = ata_port_next_link(lk))
1248
1249#define ata_port_for_each_link(link, ap) \
1250 for ((link) = ata_port_first_link(ap); (link); \
1251 (link) = ata_port_next_link(link))
f58229f8
TH		 1252
1253#define ata_link_for_each_dev(dev, link) \
1254 for ((dev) = (link)->device; \
1255 (dev) < (link)->device + ata_link_max_devices(link) || ((dev) = NULL); \
1256 (dev)++)
1257
1258#define ata_link_for_each_dev_reverse(dev, link) \
1259 for ((dev) = (link)->device + ata_link_max_devices(link) - 1; \
1260 (dev) >= (link)->device || ((dev) = NULL); (dev)--)
5806db22 1261
1da177e4
LT		 1262static inline u8 ata_chk_status(struct ata_port *ap)
1263{
1264 return ap->ops->check_status(ap);
1265}
1266
6d1245bf
TH		 1267/**
1268 * ata_ncq_enabled - Test whether NCQ is enabled
1269 * @dev: ATA device to test for
1270 *
1271 * LOCKING:
1272 * spin_lock_irqsave(host lock)
1273 *
1274 * RETURNS:
1275 * 1 if NCQ is enabled for @dev, 0 otherwise.
1276 */
1277static inline int ata_ncq_enabled(struct ata_device *dev)
1278{
1279 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF |
1280 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ;
1281}
0baab86b
EF		 1282
1283/**
1284 * ata_pause - Flush writes and pause 400 nanoseconds.
1285 * @ap: Port to wait for.
1286 *
1287 * LOCKING:
1288 * Inherited from caller.
1289 */
1290
1da177e4
LT		 1291static inline void ata_pause(struct ata_port *ap)
1292{
1293 ata_altstatus(ap);
1294 ndelay(400);
1295}
1296
0baab86b
EF		 1297
1298/**
1299 * ata_busy_wait - Wait for a port status register
1300 * @ap: Port to wait for.
0777721c
A		 1301 * @bits: bits that must be clear
1302 * @max: number of 10uS waits to perform
0baab86b
EF		 1303 *
1304 * Waits up to max*10 microseconds for the selected bits in the port's
1305 * status register to be cleared.
1306 * Returns final value of status register.
1307 *
1308 * LOCKING:
1309 * Inherited from caller.
1310 */
1311
1da177e4
LT		 1312static inline u8 ata_busy_wait(struct ata_port *ap, unsigned int bits,
1313 unsigned int max)
1314{
1315 u8 status;
1316
1317 do {
1318 udelay(10);
1319 status = ata_chk_status(ap);
1320 max--;
d1adc1bb 1321 } while (status != 0xff && (status & bits) && (max > 0));
1da177e4
LT		 1322
1323 return status;
1324}
1325
0baab86b
EF		 1326
1327/**
1328 * ata_wait_idle - Wait for a port to be idle.
1329 * @ap: Port to wait for.
1330 *
1331 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
1332 * Returns final value of status register.
1333 *
1334 * LOCKING:
1335 * Inherited from caller.
1336 */
1337
1da177e4
LT		 1338static inline u8 ata_wait_idle(struct ata_port *ap)
1339{
1340 u8 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
1341
15529456 1342#ifdef ATA_DEBUG
55f3952d 1343 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ)))
15529456
TH		 1344 ata_port_printk(ap, KERN_DEBUG, "abnormal Status 0x%X\n",
1345 status);
1346#endif
1da177e4
LT		 1347
1348 return status;
1349}
1350
1351static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
1352{
1353 qc->tf.ctl |= ATA_NIEN;
1354}
1355
f69499f4
TH		 1356static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap,
1357 unsigned int tag)
1da177e4
LT		 1358{
1359 if (likely(ata_tag_valid(tag)))
1360 return &ap->qcmd[tag];
1361 return NULL;
1362}
1363
f69499f4
TH		 1364static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap,
1365 unsigned int tag)
1366{
1367 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
1368
1369 if (unlikely(!qc) || !ap->ops->error_handler)
1370 return qc;
1371
1372 if ((qc->flags & (ATA_QCFLAG_ACTIVE |
1373 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE)
1374 return qc;
1375
1376 return NULL;
1377}
1378
3373efd8 1379static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
1da177e4
LT		 1380{
1381 memset(tf, 0, sizeof(*tf));
1382
9af5c9c9 1383 tf->ctl = dev->link->ap->ctl;
3373efd8 1384 if (dev->devno == 0)
1da177e4
LT		 1385 tf->device = ATA_DEVICE_OBS;
1386 else
1387 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
1388}
1389
2c13b7ce
JG		 1390static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
1391{
501e0c50 1392 qc->dma_dir = DMA_NONE;
2c13b7ce
JG		 1393 qc->__sg = NULL;
1394 qc->flags = 0;
87260216
JA		 1395 qc->cursg = NULL;
1396 qc->cursg_ofs = 0;
2c13b7ce 1397 qc->nbytes = qc->curbytes = 0;
7a801184 1398 qc->n_elem = 0;
87260216 1399 qc->n_iter = 0;
a22e2eb0 1400 qc->err_mask = 0;
d0f29485 1401 qc->pad_len = 0;
5a5dbd18 1402 qc->sect_size = ATA_SECT_SIZE;
2c13b7ce 1403
3373efd8 1404 ata_tf_init(qc->dev, &qc->tf);
e61e0672
TH		 1405
1406 /* init result_tf such that it indicates normal completion */
1407 qc->result_tf.command = ATA_DRDY;
1408 qc->result_tf.feature = 0;
2c13b7ce
JG		 1409}
1410
057ace5e 1411static inline int ata_try_flush_cache(const struct ata_device *dev)
1da177e4
LT		 1412{
1413 return ata_id_wcache_enabled(dev->id) ||
1414 ata_id_has_flush(dev->id) ||
1415 ata_id_has_flush_ext(dev->id);
1416}
1417
ceb0c642
TH		 1418static inline int atapi_cmd_type(u8 opcode)
1419{
1420 switch (opcode) {
1421 case GPCMD_READ_10:
1422 case GPCMD_READ_12:
1423 return ATAPI_READ;
1424
1425 case GPCMD_WRITE_10:
1426 case GPCMD_WRITE_12:
1427 case GPCMD_WRITE_AND_VERIFY_10:
1428 return ATAPI_WRITE;
1429
1430 case GPCMD_READ_CD:
1431 case GPCMD_READ_CD_MSF:
1432 return ATAPI_READ_CD;
1433
1434 default:
1435 return ATAPI_MISC;
1436 }
1437}
1438
a7dac447
JG		 1439static inline unsigned int ac_err_mask(u8 status)
1440{
3655d1d3 1441 if (status & (ATA_BUSY | ATA_DRQ))
11a56d24 1442 return AC_ERR_HSM;
a7dac447
JG		 1443 if (status & (ATA_ERR | ATA_DF))
1444 return AC_ERR_DEV;
1445 return 0;
1446}
1447
1448static inline unsigned int __ac_err_mask(u8 status)
1449{
1450 unsigned int mask = ac_err_mask(status);
1451 if (mask == 0)
1452 return AC_ERR_OTHER;
1453 return mask;
1454}
1455
6037d6bb
JG		 1456static inline int ata_pad_alloc(struct ata_port *ap, struct device *dev)
1457{
1458 ap->pad_dma = 0;
f0d36efd
TH		 1459 ap->pad = dmam_alloc_coherent(dev, ATA_DMA_PAD_BUF_SZ,
1460 &ap->pad_dma, GFP_KERNEL);
6037d6bb
JG		 1461 return (ap->pad == NULL) ? -ENOMEM : 0;
1462}
1463
1464static inline void ata_pad_free(struct ata_port *ap, struct device *dev)
1465{
f0d36efd 1466 dmam_free_coherent(dev, ATA_DMA_PAD_BUF_SZ, ap->pad, ap->pad_dma);
6037d6bb
JG		 1467}
1468
35bb94b1
JG		 1469static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
1470{
4911487a 1471 return *(struct ata_port **)&host->hostdata[0];
35bb94b1
JG		 1472}
1473
1da177e4 1474#endif /* __LINUX_LIBATA_H__ */
Linux kernel - Deliverables
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