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libata-acpi: add new hooks ata_acpi_dissociate() and ata_acpi_on_disable()
[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>
1da177e4 38
a6d967a4
JG		 39/*
40 * Define if arch has non-standard setup. This is a _PCI_ standard
41 * not a legacy or ISA standard.
42 */
43#ifdef CONFIG_ATA_NONSTANDARD
2ec7df04 44#include <asm/libata-portmap.h>
a6d967a4
JG		 45#else
46#include <asm-generic/libata-portmap.h>
47#endif
2ec7df04 48
1da177e4 49/*
bfd60579
RD		 50 * compile-time options: to be removed as soon as all the drivers are
51 * converted to the new debugging mechanism
1da177e4
LT		 52 */
53#undef ATA_DEBUG /* debugging output */
54#undef ATA_VERBOSE_DEBUG /* yet more debugging output */
55#undef ATA_IRQ_TRAP /* define to ack screaming irqs */
56#undef ATA_NDEBUG /* define to disable quick runtime checks */
1da177e4
LT		 57
58
59/* note: prints function name for you */
60#ifdef ATA_DEBUG
61#define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
62#ifdef ATA_VERBOSE_DEBUG
63#define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
64#else
65#define VPRINTK(fmt, args...)
66#endif /* ATA_VERBOSE_DEBUG */
67#else
68#define DPRINTK(fmt, args...)
69#define VPRINTK(fmt, args...)
70#endif /* ATA_DEBUG */
71
2c13b7ce
JG		 72#define BPRINTK(fmt, args...) if (ap->flags & ATA_FLAG_DEBUGMSG) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
73
bfd60579
RD		 74/* NEW: debug levels */
75#define HAVE_LIBATA_MSG 1
76
77enum {
78 ATA_MSG_DRV = 0x0001,
79 ATA_MSG_INFO = 0x0002,
80 ATA_MSG_PROBE = 0x0004,
81 ATA_MSG_WARN = 0x0008,
82 ATA_MSG_MALLOC = 0x0010,
83 ATA_MSG_CTL = 0x0020,
84 ATA_MSG_INTR = 0x0040,
85 ATA_MSG_ERR = 0x0080,
86};
87
88#define ata_msg_drv(p) ((p)->msg_enable & ATA_MSG_DRV)
89#define ata_msg_info(p) ((p)->msg_enable & ATA_MSG_INFO)
90#define ata_msg_probe(p) ((p)->msg_enable & ATA_MSG_PROBE)
91#define ata_msg_warn(p) ((p)->msg_enable & ATA_MSG_WARN)
92#define ata_msg_malloc(p) ((p)->msg_enable & ATA_MSG_MALLOC)
93#define ata_msg_ctl(p) ((p)->msg_enable & ATA_MSG_CTL)
94#define ata_msg_intr(p) ((p)->msg_enable & ATA_MSG_INTR)
95#define ata_msg_err(p) ((p)->msg_enable & ATA_MSG_ERR)
96
97static inline u32 ata_msg_init(int dval, int default_msg_enable_bits)
98{
99 if (dval < 0 || dval >= (sizeof(u32) * 8))
100 return default_msg_enable_bits; /* should be 0x1 - only driver info msgs */
101 if (!dval)
102 return 0;
103 return (1 << dval) - 1;
104}
105
1da177e4
LT		 106/* defines only for the constants which don't work well as enums */
107#define ATA_TAG_POISON 0xfafbfcfdU
108
1da177e4
LT		 109enum {
110 /* various global constants */
111 LIBATA_MAX_PRD = ATA_MAX_PRD / 2,
d26fc955 112 LIBATA_DUMB_MAX_PRD = ATA_MAX_PRD / 4, /* Worst case */
1da177e4
LT		 113 ATA_MAX_PORTS = 8,
114 ATA_DEF_QUEUE = 1,
2ab7db1f 115 /* tag ATA_MAX_QUEUE - 1 is reserved for internal commands */
a6e6ce8e 116 ATA_MAX_QUEUE = 32,
2ab7db1f 117 ATA_TAG_INTERNAL = ATA_MAX_QUEUE - 1,
1da177e4
LT		 118 ATA_MAX_BUS = 2,
119 ATA_DEF_BUSY_WAIT = 10000,
120 ATA_SHORT_PAUSE = (HZ >> 6) + 1,
121
122 ATA_SHT_EMULATED = 1,
123 ATA_SHT_CMD_PER_LUN = 1,
124 ATA_SHT_THIS_ID = -1,
cf482935 125 ATA_SHT_USE_CLUSTERING = 1,
1da177e4
LT		 126
127 /* struct ata_device stuff */
949b38af
TH		 128 ATA_DFLAG_LBA = (1 << 0), /* device supports LBA */
129 ATA_DFLAG_LBA48 = (1 << 1), /* device supports LBA48 */
029f5468 130 ATA_DFLAG_CDB_INTR = (1 << 2), /* device asserts INTRQ when ready for CDB */
88e49034 131 ATA_DFLAG_NCQ = (1 << 3), /* device supports NCQ */
6fc49adb 132 ATA_DFLAG_FLUSH_EXT = (1 << 4), /* do FLUSH_EXT instead of FLUSH */
6746544c
TH		 133 ATA_DFLAG_ACPI_PENDING = (1 << 5), /* ACPI resume action pending */
134 ATA_DFLAG_ACPI_FAILED = (1 << 6), /* ACPI on devcfg has failed */
7d77b247 135 ATA_DFLAG_AN = (1 << 7), /* AN configured */
ca77329f
KCA		 136 ATA_DFLAG_HIPM = (1 << 8), /* device supports HIPM */
137 ATA_DFLAG_DIPM = (1 << 9), /* device supports DIPM */
2557164e 138 ATA_DFLAG_CFG_MASK = (1 << 12) - 1,
949b38af 139
2557164e
KCA		 140 ATA_DFLAG_PIO = (1 << 12), /* device limited to PIO mode */
141 ATA_DFLAG_NCQ_OFF = (1 << 13), /* device limited to non-NCQ mode */
142 ATA_DFLAG_SPUNDOWN = (1 << 14), /* XXX: for spindown_compat */
054a5fba 143 ATA_DFLAG_SLEEPING = (1 << 15), /* device is sleeping */
72fa4b74 144 ATA_DFLAG_INIT_MASK = (1 << 16) - 1,
1da177e4 145
abdda733
TH		 146 ATA_DFLAG_DETACH = (1 << 16),
147 ATA_DFLAG_DETACHED = (1 << 17),
148
1da177e4
LT		 149 ATA_DEV_UNKNOWN = 0, /* unknown device */
150 ATA_DEV_ATA = 1, /* ATA device */
151 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */
152 ATA_DEV_ATAPI = 3, /* ATAPI device */
153 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */
e0a71752
TH		 154 ATA_DEV_PMP = 5, /* SATA port multiplier */
155 ATA_DEV_PMP_UNSUP = 6, /* SATA port multiplier (unsupported) */
156 ATA_DEV_SEMB = 7, /* SEMB */
157 ATA_DEV_SEMB_UNSUP = 8, /* SEMB (unsupported) */
158 ATA_DEV_NONE = 9, /* no device */
1da177e4 159
0c88758b
TH		 160 /* struct ata_link flags */
161 ATA_LFLAG_HRST_TO_RESUME = (1 << 0), /* hardreset to resume link */
162 ATA_LFLAG_SKIP_D2H_BSY = (1 << 1), /* can't wait for the first D2H
163 * Register FIS clearing BSY */
ae791c05
TH		 164 ATA_LFLAG_NO_SRST = (1 << 2), /* avoid softreset */
165 ATA_LFLAG_ASSUME_ATA = (1 << 3), /* assume ATA class */
166 ATA_LFLAG_ASSUME_SEMB = (1 << 4), /* assume SEMB class */
167 ATA_LFLAG_ASSUME_CLASS = ATA_LFLAG_ASSUME_ATA | ATA_LFLAG_ASSUME_SEMB,
fd995f70 168 ATA_LFLAG_NO_RETRY = (1 << 5), /* don't retry this link */
f9df58cb 169 ATA_LFLAG_DISABLED = (1 << 6), /* link is disabled */
0c88758b 170
1da177e4 171 /* struct ata_port flags */
949b38af 172 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */
1da177e4 173 /* (doesn't imply presence) */
949b38af
TH		 174 ATA_FLAG_SATA = (1 << 1),
175 ATA_FLAG_NO_LEGACY = (1 << 2), /* no legacy mode check */
176 ATA_FLAG_MMIO = (1 << 3), /* use MMIO, not PIO */
177 ATA_FLAG_SRST = (1 << 4), /* (obsolete) use ATA SRST, not E.D.D. */
178 ATA_FLAG_SATA_RESET = (1 << 5), /* (obsolete) use COMRESET */
179 ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */
180 ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */
181 ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */
7395acb2
TH		 182 ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD
183 * doesn't handle PIO interrupts */
184 ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */
7395acb2 185 ATA_FLAG_DEBUGMSG = (1 << 13),
b2a8bbe6 186 ATA_FLAG_IGN_SIMPLEX = (1 << 15), /* ignore SIMPLEX */
f834e49f 187 ATA_FLAG_NO_IORDY = (1 << 16), /* controller lacks iordy */
3cadbcc0 188 ATA_FLAG_ACPI_SATA = (1 << 17), /* need native SATA ACPI layout */
9f45cbd3 189 ATA_FLAG_AN = (1 << 18), /* controller supports AN */
e0a71752 190 ATA_FLAG_PMP = (1 << 19), /* controller supports PMP */
ca77329f 191 ATA_FLAG_IPM = (1 << 20), /* driver can handle IPM */
949b38af 192
b51e9e5d
TH		 193 /* The following flag belongs to ap->pflags but is kept in
194 * ap->flags because it's referenced in many LLDs and will be
195 * removed in not-too-distant future.
196 */
197 ATA_FLAG_DISABLED = (1 << 23), /* port is disabled, ignore it */
198
199 /* bits 24:31 of ap->flags are reserved for LLD specific flags */
9ec957f2 200
b51e9e5d
TH		 201 /* struct ata_port pflags */
202 ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */
203 ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */
204 ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */
205 ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */
206 ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */
207 ATA_PFLAG_UNLOADING = (1 << 5), /* module is unloading */
208 ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */
f4d6d004 209 ATA_PFLAG_INITIALIZING = (1 << 7), /* being initialized, don't touch */
afaa5c37 210 ATA_PFLAG_RESETTING = (1 << 8), /* reset in progress */
949b38af 211
b51e9e5d 212 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */
500530f6 213 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */
64578a3d 214 ATA_PFLAG_GTM_VALID = (1 << 19), /* acpi_gtm data valid */
949b38af
TH		 215
216 /* struct ata_queued_cmd flags */
217 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */
218 ATA_QCFLAG_SG = (1 << 1), /* have s/g table? */
219 ATA_QCFLAG_SINGLE = (1 << 2), /* no s/g, just a single buffer */
1da177e4 220 ATA_QCFLAG_DMAMAP = ATA_QCFLAG_SG | ATA_QCFLAG_SINGLE,
27197367 221 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */
e61e0672 222 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */
da917d69 223 ATA_QCFLAG_CLEAR_EXCL = (1 << 5), /* clear excl_link on completion */
e027bd36 224 ATA_QCFLAG_QUIET = (1 << 6), /* don't report device error */
e61e0672 225
9ec957f2
TH		 226 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */
227 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */
228 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */
1da177e4 229
4e5ec5db 230 /* host set flags */
cca3974e 231 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */
ecef7253 232 ATA_HOST_STARTED = (1 << 1), /* Host started */
9bec2e38 233
b8b275ef
TH		 234 /* bits 24:31 of host->flags are reserved for LLD specific flags */
235
1da177e4 236 /* various lengths of time */
8d238e01
AC		 237 ATA_TMOUT_BOOT = 30 * HZ, /* heuristic */
238 ATA_TMOUT_BOOT_QUICK = 7 * HZ, /* heuristic */
a2a7a662
TH		 239 ATA_TMOUT_INTERNAL = 30 * HZ,
240 ATA_TMOUT_INTERNAL_QUICK = 5 * HZ,
1da177e4 241
88ff6eaf
TH		 242 /* FIXME: GoVault needs 2s but we can't afford that without
243 * parallel probing. 800ms is enough for iVDR disk
244 * HHD424020F7SV00. Increase to 2secs when parallel probing
245 * is in place.
246 */
247 ATA_TMOUT_FF_WAIT = 4 * HZ / 5,
248
1da177e4
LT		 249 /* ATA bus states */
250 BUS_UNKNOWN = 0,
251 BUS_DMA = 1,
252 BUS_IDLE = 2,
253 BUS_NOINTR = 3,
254 BUS_NODATA = 4,
255 BUS_TIMER = 5,
256 BUS_PIO = 6,
257 BUS_EDD = 7,
258 BUS_IDENTIFY = 8,
259 BUS_PACKET = 9,
260
261 /* SATA port states */
262 PORT_UNKNOWN = 0,
263 PORT_ENABLED = 1,
264 PORT_DISABLED = 2,
265
266 /* encoding various smaller bitmaps into a single
1da7b0d0 267 * unsigned int bitmap
1da177e4 268 */
b352e57d
AC		 269 ATA_BITS_PIO = 7,
270 ATA_BITS_MWDMA = 5,
1da7b0d0
TH		 271 ATA_BITS_UDMA = 8,
272
273 ATA_SHIFT_PIO = 0,
274 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_BITS_PIO,
275 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_BITS_MWDMA,
276
277 ATA_MASK_PIO = ((1 << ATA_BITS_PIO) - 1) << ATA_SHIFT_PIO,
278 ATA_MASK_MWDMA = ((1 << ATA_BITS_MWDMA) - 1) << ATA_SHIFT_MWDMA,
279 ATA_MASK_UDMA = ((1 << ATA_BITS_UDMA) - 1) << ATA_SHIFT_UDMA,
cedc9a47
JG		 280
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 */
1da177e4
LT		 350};
351
14be71f4 352enum hsm_task_states {
c56b14d2 353 HSM_ST_IDLE, /* no command on going */
71527647
AL		 354 HSM_ST_FIRST, /* (waiting the device to)
355 write CDB or first data block */
c56b14d2
AL		 356 HSM_ST, /* (waiting the device to) transfer data */
357 HSM_ST_LAST, /* (waiting the device to) complete command */
c56b14d2 358 HSM_ST_ERR, /* error */
1da177e4
LT		 359};
360
a7dac447 361enum ata_completion_errors {
11a56d24
TH		 362 AC_ERR_DEV = (1 << 0), /* device reported error */
363 AC_ERR_HSM = (1 << 1), /* host state machine violation */
364 AC_ERR_TIMEOUT = (1 << 2), /* timeout */
365 AC_ERR_MEDIA = (1 << 3), /* media error */
366 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */
367 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */
368 AC_ERR_SYSTEM = (1 << 6), /* system error */
369 AC_ERR_INVALID = (1 << 7), /* invalid argument */
370 AC_ERR_OTHER = (1 << 8), /* unknown */
55a8e2c8 371 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */
5335b729 372 AC_ERR_NCQ = (1 << 10), /* marker for offending NCQ qc */
a7dac447
JG		 373};
374
1da177e4
LT		 375/* forward declarations */
376struct scsi_device;
377struct ata_port_operations;
378struct ata_port;
cc0680a5 379struct ata_link;
1da177e4
LT		 380struct ata_queued_cmd;
381
382/* typedefs */
77853bf2 383typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
cc0680a5
TH		 384typedef int (*ata_prereset_fn_t)(struct ata_link *link, unsigned long deadline);
385typedef int (*ata_reset_fn_t)(struct ata_link *link, unsigned int *classes,
d4b2bab4 386 unsigned long deadline);
cc0680a5 387typedef void (*ata_postreset_fn_t)(struct ata_link *link, unsigned int *classes);
1da177e4 388
ca77329f
KCA		 389/*
390 * host pm policy: If you alter this, you also need to alter libata-scsi.c
391 * (for the ascii descriptions)
392 */
393enum link_pm {
394 NOT_AVAILABLE,
395 MIN_POWER,
396 MAX_PERFORMANCE,
397 MEDIUM_POWER,
398};
399extern struct class_device_attribute class_device_attr_link_power_management_policy;
400
1da177e4 401struct ata_ioports {
0d5ff566
TH		 402 void __iomem *cmd_addr;
403 void __iomem *data_addr;
404 void __iomem *error_addr;
405 void __iomem *feature_addr;
406 void __iomem *nsect_addr;
407 void __iomem *lbal_addr;
408 void __iomem *lbam_addr;
409 void __iomem *lbah_addr;
410 void __iomem *device_addr;
411 void __iomem *status_addr;
412 void __iomem *command_addr;
413 void __iomem *altstatus_addr;
414 void __iomem *ctl_addr;
415 void __iomem *bmdma_addr;
416 void __iomem *scr_addr;
1da177e4
LT		 417};
418
cca3974e 419struct ata_host {
1da177e4
LT		 420 spinlock_t lock;
421 struct device *dev;
0d5ff566 422 void __iomem * const *iomap;
1da177e4
LT		 423 unsigned int n_ports;
424 void *private_data;
057ace5e 425 const struct ata_port_operations *ops;
5444a6f4 426 unsigned long flags;
fafbae87
TH		 427#ifdef CONFIG_ATA_ACPI
428 acpi_handle acpi_handle;
429#endif
032af1ce 430 struct ata_port *simplex_claimed; /* channel owning the DMA */
f0eb62b8 431 struct ata_port *ports[0];
1da177e4
LT		 432};
433
434struct ata_queued_cmd {
435 struct ata_port *ap;
436 struct ata_device *dev;
437
438 struct scsi_cmnd *scsicmd;
439 void (*scsidone)(struct scsi_cmnd *);
440
441 struct ata_taskfile tf;
442 u8 cdb[ATAPI_CDB_LEN];
443
444 unsigned long flags; /* ATA_QCFLAG_xxx */
445 unsigned int tag;
446 unsigned int n_elem;
87260216 447 unsigned int n_iter;
cedc9a47 448 unsigned int orig_n_elem;
1da177e4
LT		 449
450 int dma_dir;
451
cedc9a47 452 unsigned int pad_len;
5a5dbd18 453 unsigned int sect_size;
cedc9a47 454
1da177e4
LT		 455 unsigned int nbytes;
456 unsigned int curbytes;
457
87260216 458 struct scatterlist *cursg;
1da177e4
LT		 459 unsigned int cursg_ofs;
460
461 struct scatterlist sgent;
cedc9a47 462 struct scatterlist pad_sgent;
1da177e4
LT		 463 void *buf_virt;
464
cedc9a47
JG		 465 /* DO NOT iterate over __sg manually, use ata_for_each_sg() */
466 struct scatterlist *__sg;
1da177e4 467
a22e2eb0 468 unsigned int err_mask;
e61e0672 469 struct ata_taskfile result_tf;
1da177e4
LT		 470 ata_qc_cb_t complete_fn;
471
1da177e4 472 void *private_data;
1c50dc83 473 void *lldd_task;
1da177e4
LT		 474};
475
cca3974e 476struct ata_port_stats {
1da177e4
LT		 477 unsigned long unhandled_irq;
478 unsigned long idle_irq;
479 unsigned long rw_reqbuf;
480};
481
0c247c55
TH		 482struct ata_ering_entry {
483 int is_io;
484 unsigned int err_mask;
485 u64 timestamp;
486};
487
488struct ata_ering {
489 int cursor;
490 struct ata_ering_entry ring[ATA_ERING_SIZE];
491};
492
1da177e4 493struct ata_device {
9af5c9c9 494 struct ata_link *link;
72fa4b74 495 unsigned int devno; /* 0 or 1 */
1da177e4 496 unsigned long flags; /* ATA_DFLAG_xxx */
75683fe7 497 unsigned int horkage; /* List of broken features */
3edebac4 498 struct scsi_device *sdev; /* attached SCSI device */
fafbae87
TH		 499#ifdef CONFIG_ATA_ACPI
500 acpi_handle acpi_handle;
501#endif
72fa4b74
TH		 502 /* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */
503 u64 n_sectors; /* size of device, if ATA */
1da177e4 504 unsigned int class; /* ATA_DEV_xxx */
e0a71752
TH		 505
506 union {
507 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
508 u32 gscr[SATA_PMP_GSCR_DWORDS]; /* PMP GSCR block */
509 };
510
1da177e4
LT		 511 u8 pio_mode;
512 u8 dma_mode;
513 u8 xfer_mode;
514 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
515
8cbd6df1
AL		 516 unsigned int multi_count; /* sectors count for
517 READ/WRITE MULTIPLE */
b00eec1d 518 unsigned int max_sectors; /* per-device max sectors */
6e7846e9 519 unsigned int cdb_len;
8bf62ece 520
acf356b1
TH		 521 /* per-dev xfer mask */
522 unsigned int pio_mask;
523 unsigned int mwdma_mask;
524 unsigned int udma_mask;
525
8bf62ece
AL		 526 /* for CHS addressing */
527 u16 cylinders; /* Number of cylinders */
528 u16 heads; /* Number of heads */
529 u16 sectors; /* Number of sectors per track */
0c247c55
TH		 530
531 /* error history */
532 struct ata_ering ering;
7d47e8d4 533 int spdn_cnt;
1da177e4
LT		 534};
535
72fa4b74
TH		 536/* Offset into struct ata_device. Fields above it are maintained
537 * acress device init. Fields below are zeroed.
538 */
539#define ATA_DEVICE_CLEAR_OFFSET offsetof(struct ata_device, n_sectors)
540
f3e81b19
TH		 541struct ata_eh_info {
542 struct ata_device *dev; /* offending device */
543 u32 serror; /* SError from LLDD */
544 unsigned int err_mask; /* port-wide err_mask */
545 unsigned int action; /* ATA_EH_* action mask */
47005f25 546 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */
f3e81b19 547 unsigned int flags; /* ATA_EHI_* flags */
abdda733 548
abdda733
TH		 549 unsigned int probe_mask;
550
f3e81b19
TH		 551 char desc[ATA_EH_DESC_LEN];
552 int desc_len;
553};
554
555struct ata_eh_context {
556 struct ata_eh_info i;
557 int tries[ATA_MAX_DEVICES];
abdda733
TH		 558 unsigned int classes[ATA_MAX_DEVICES];
559 unsigned int did_probe_mask;
f3e81b19
TH		 560};
561
64578a3d
TH		 562struct ata_acpi_drive
563{
564 u32 pio;
565 u32 dma;
566} __packed;
567
568struct ata_acpi_gtm {
569 struct ata_acpi_drive drive[2];
570 u32 flags;
571} __packed;
572
9af5c9c9
TH		 573struct ata_link {
574 struct ata_port *ap;
8989805d 575 int pmp; /* port multiplier port # */
9af5c9c9
TH		 576
577 unsigned int active_tag; /* active tag on this link */
578 u32 sactive; /* active NCQ commands */
579
0c88758b
TH		 580 unsigned int flags; /* ATA_LFLAG_xxx */
581
9af5c9c9
TH		 582 unsigned int hw_sata_spd_limit;
583 unsigned int sata_spd_limit;
584 unsigned int sata_spd; /* current SATA PHY speed */
585
586 /* record runtime error info, protected by host_set lock */
587 struct ata_eh_info eh_info;
588 /* EH context */
589 struct ata_eh_context eh_context;
590
591 struct ata_device device[ATA_MAX_DEVICES];
592};
593
1da177e4 594struct ata_port {
cca3974e 595 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */
057ace5e 596 const struct ata_port_operations *ops;
ba6a1308 597 spinlock_t *lock;
1da177e4 598 unsigned long flags; /* ATA_FLAG_xxx */
b51e9e5d 599 unsigned int pflags; /* ATA_PFLAG_xxx */
44877b4e
TH		 600 unsigned int print_id; /* user visible unique port ID */
601 unsigned int port_no; /* 0 based port no. inside the host */
1da177e4
LT		 602
603 struct ata_prd *prd; /* our SG list */
604 dma_addr_t prd_dma; /* and its DMA mapping */
605
cedc9a47
JG		 606 void *pad; /* array of DMA pad buffers */
607 dma_addr_t pad_dma;
608
1da177e4
LT		 609 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
610
611 u8 ctl; /* cache of ATA control register */
612 u8 last_ctl; /* Cache last written value */
1da177e4
LT		 613 unsigned int pio_mask;
614 unsigned int mwdma_mask;
615 unsigned int udma_mask;
616 unsigned int cbl; /* cable type; ATA_CBL_xxx */
1da177e4
LT		 617
618 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
6cec4a39 619 unsigned long qc_allocated;
dedaf2b0 620 unsigned int qc_active;
da917d69 621 int nr_active_links; /* #links with active qcs */
dedaf2b0 622
9af5c9c9 623 struct ata_link link; /* host default link */
1da177e4 624
8989805d
TH		 625 int nr_pmp_links; /* nr of available PMP links */
626 struct ata_link *pmp_link; /* array of PMP links */
da917d69 627 struct ata_link *excl_link; /* for PMP qc exclusion */
8989805d 628
cca3974e
JG		 629 struct ata_port_stats stats;
630 struct ata_host *host;
2f1f610b 631 struct device *dev;
1da177e4 632
65f27f38 633 void *port_task_data;
52bad64d
DH		 634 struct delayed_work port_task;
635 struct delayed_work hotplug_task;
3b01b8af 636 struct work_struct scsi_rescan_task;
86e45b6b 637
14be71f4 638 unsigned int hsm_task_state;
1da177e4 639
bfd60579 640 u32 msg_enable;
a72ec4ce 641 struct list_head eh_done_q;
c6cf9e99 642 wait_queue_head_t eh_wait_q;
a1e10f7e 643 int eh_tries;
bfd60579 644
500530f6
TH		 645 pm_message_t pm_mesg;
646 int *pm_result;
ca77329f 647 enum link_pm pm_policy;
500530f6 648
5ddf24c5
TH		 649 struct timer_list fastdrain_timer;
650 unsigned long fastdrain_cnt;
651
1da177e4 652 void *private_data;
fe635c7e 653
fafbae87
TH		 654#ifdef CONFIG_ATA_ACPI
655 acpi_handle acpi_handle;
64578a3d 656 struct ata_acpi_gtm acpi_gtm;
fafbae87 657#endif
fe635c7e 658 u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */
1da177e4
LT		 659};
660
661struct ata_port_operations {
cd0d3bbc 662 void (*dev_config) (struct ata_device *);
1da177e4
LT		 663
664 void (*set_piomode) (struct ata_port *, struct ata_device *);
665 void (*set_dmamode) (struct ata_port *, struct ata_device *);
a76b62ca 666 unsigned long (*mode_filter) (struct ata_device *, unsigned long);
1da177e4 667
057ace5e 668 void (*tf_load) (struct ata_port *ap, const struct ata_taskfile *tf);
1da177e4
LT		 669 void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf);
670
057ace5e 671 void (*exec_command)(struct ata_port *ap, const struct ata_taskfile *tf);
1da177e4
LT		 672 u8 (*check_status)(struct ata_port *ap);
673 u8 (*check_altstatus)(struct ata_port *ap);
1da177e4
LT		 674 void (*dev_select)(struct ata_port *ap, unsigned int device);
675
c19ba8af 676 void (*phy_reset) (struct ata_port *ap); /* obsolete */
0260731f 677 int (*set_mode) (struct ata_link *link, struct ata_device **r_failed_dev);
c19ba8af 678
be0d18df
AC		 679 int (*cable_detect) (struct ata_port *ap);
680
b229a7b0 681 int (*check_atapi_dma) (struct ata_queued_cmd *qc);
1da177e4
LT		 682
683 void (*bmdma_setup) (struct ata_queued_cmd *qc);
684 void (*bmdma_start) (struct ata_queued_cmd *qc);
685
a6b2c5d4
AC		 686 void (*data_xfer) (struct ata_device *, unsigned char *, unsigned int, int);
687
31cc23b3 688 int (*qc_defer) (struct ata_queued_cmd *qc);
1da177e4 689 void (*qc_prep) (struct ata_queued_cmd *qc);
9a3d9eb0 690 unsigned int (*qc_issue) (struct ata_queued_cmd *qc);
1da177e4 691
e0a71752
TH		 692 /* port multiplier */
693 void (*pmp_attach) (struct ata_port *ap);
694 void (*pmp_detach) (struct ata_port *ap);
e0a71752 695
9ec957f2
TH		 696 /* Error handlers. ->error_handler overrides ->eng_timeout and
697 * indicates that new-style EH is in place.
698 */
699 void (*eng_timeout) (struct ata_port *ap); /* obsolete */
700
701 void (*freeze) (struct ata_port *ap);
702 void (*thaw) (struct ata_port *ap);
703 void (*error_handler) (struct ata_port *ap);
704 void (*post_internal_cmd) (struct ata_queued_cmd *qc);
1da177e4 705
7d12e780 706 irq_handler_t irq_handler;
1da177e4 707 void (*irq_clear) (struct ata_port *);
83625006 708 u8 (*irq_on) (struct ata_port *);
1da177e4 709
da3dbb17
TH		 710 int (*scr_read) (struct ata_port *ap, unsigned int sc_reg, u32 *val);
711 int (*scr_write) (struct ata_port *ap, unsigned int sc_reg, u32 val);
1da177e4 712
500530f6
TH		 713 int (*port_suspend) (struct ata_port *ap, pm_message_t mesg);
714 int (*port_resume) (struct ata_port *ap);
ca77329f
KCA		 715 int (*enable_pm) (struct ata_port *ap, enum link_pm policy);
716 void (*disable_pm) (struct ata_port *ap);
1da177e4
LT		 717 int (*port_start) (struct ata_port *ap);
718 void (*port_stop) (struct ata_port *ap);
719
cca3974e 720 void (*host_stop) (struct ata_host *host);
1da177e4 721
b73fc89f 722 void (*bmdma_stop) (struct ata_queued_cmd *qc);
1da177e4
LT		 723 u8 (*bmdma_status) (struct ata_port *ap);
724};
725
726struct ata_port_info {
d0be4a7d 727 struct scsi_host_template *sht;
cca3974e 728 unsigned long flags;
0c88758b 729 unsigned long link_flags;
1da177e4
LT		 730 unsigned long pio_mask;
731 unsigned long mwdma_mask;
732 unsigned long udma_mask;
057ace5e 733 const struct ata_port_operations *port_ops;
21b0ad4f 734 irq_handler_t irq_handler;
e99f8b5e 735 void *private_data;
1da177e4
LT		 736};
737
452503f9
AC		 738struct ata_timing {
739 unsigned short mode; /* ATA mode */
740 unsigned short setup; /* t1 */
741 unsigned short act8b; /* t2 for 8-bit I/O */
742 unsigned short rec8b; /* t2i for 8-bit I/O */
743 unsigned short cyc8b; /* t0 for 8-bit I/O */
744 unsigned short active; /* t2 or tD */
745 unsigned short recover; /* t2i or tK */
746 unsigned short cycle; /* t0 */
747 unsigned short udma; /* t2CYCTYP/2 */
748};
749
2dcb407e 750#define FIT(v, vmin, vmax) max_t(short, min_t(short, v, vmax), vmin)
1da177e4 751
e9c83914
TH		 752extern const unsigned long sata_deb_timing_normal[];
753extern const unsigned long sata_deb_timing_hotplug[];
754extern const unsigned long sata_deb_timing_long[];
755
dd5b06c4 756extern const struct ata_port_operations ata_dummy_port_ops;
21b0ad4f 757extern const struct ata_port_info ata_dummy_port_info;
dd5b06c4 758
e9c83914
TH		 759static inline const unsigned long *
760sata_ehc_deb_timing(struct ata_eh_context *ehc)
761{
762 if (ehc->i.flags & ATA_EHI_HOTPLUGGED)
763 return sata_deb_timing_hotplug;
764 else
765 return sata_deb_timing_normal;
766}
d7bb4cc7 767
dd5b06c4
TH		 768static inline int ata_port_is_dummy(struct ata_port *ap)
769{
770 return ap->ops == &ata_dummy_port_ops;
771}
772
936fd732 773extern void sata_print_link_status(struct ata_link *link);
1da177e4 774extern void ata_port_probe(struct ata_port *);
1da177e4 775extern void ata_bus_reset(struct ata_port *ap);
936fd732
TH		 776extern int sata_set_spd(struct ata_link *link);
777extern int sata_link_debounce(struct ata_link *link,
778 const unsigned long *params, unsigned long deadline);
779extern int sata_link_resume(struct ata_link *link, const unsigned long *params,
780 unsigned long deadline);
cc0680a5
TH		 781extern int ata_std_prereset(struct ata_link *link, unsigned long deadline);
782extern int ata_std_softreset(struct ata_link *link, unsigned int *classes,
d4b2bab4 783 unsigned long deadline);
cc0680a5
TH		 784extern int sata_link_hardreset(struct ata_link *link,
785 const unsigned long *timing, unsigned long deadline);
786extern int sata_std_hardreset(struct ata_link *link, unsigned int *class,
d4b2bab4 787 unsigned long deadline);
cc0680a5 788extern void ata_std_postreset(struct ata_link *link, unsigned int *classes);
1da177e4
LT		 789extern void ata_port_disable(struct ata_port *);
790extern void ata_std_ports(struct ata_ioports *ioaddr);
2855568b 791
f3187195 792extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports);
f5cda257
TH		 793extern struct ata_host *ata_host_alloc_pinfo(struct device *dev,
794 const struct ata_port_info * const * ppi, int n_ports);
ecef7253 795extern int ata_host_start(struct ata_host *host);
f3187195
TH		 796extern int ata_host_register(struct ata_host *host,
797 struct scsi_host_template *sht);
f5cda257
TH		 798extern int ata_host_activate(struct ata_host *host, int irq,
799 irq_handler_t irq_handler, unsigned long irq_flags,
800 struct scsi_host_template *sht);
0529c159 801extern void ata_host_detach(struct ata_host *host);
cca3974e
JG		 802extern void ata_host_init(struct ata_host *, struct device *,
803 unsigned long, const struct ata_port_operations *);
193515d5 804extern int ata_scsi_detect(struct scsi_host_template *sht);
1da177e4
LT		 805extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
806extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *));
80289167 807extern void ata_sas_port_destroy(struct ata_port *);
cca3974e 808extern struct ata_port *ata_sas_port_alloc(struct ata_host *,
80289167
BK		 809 struct ata_port_info *, struct Scsi_Host *);
810extern int ata_sas_port_init(struct ata_port *);
811extern int ata_sas_port_start(struct ata_port *ap);
812extern void ata_sas_port_stop(struct ata_port *ap);
813extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *);
814extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
815 struct ata_port *ap);
1da177e4 816extern unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc);
936fd732
TH		 817extern int sata_scr_valid(struct ata_link *link);
818extern int sata_scr_read(struct ata_link *link, int reg, u32 *val);
819extern int sata_scr_write(struct ata_link *link, int reg, u32 val);
820extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val);
821extern int ata_link_online(struct ata_link *link);
822extern int ata_link_offline(struct ata_link *link);
6ffa01d8 823#ifdef CONFIG_PM
cca3974e
JG		 824extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg);
825extern void ata_host_resume(struct ata_host *host);
6ffa01d8 826#endif
67846b30 827extern int ata_ratelimit(void);
d1adc1bb
TH		 828extern int ata_busy_sleep(struct ata_port *ap,
829 unsigned long timeout_pat, unsigned long timeout);
88ff6eaf 830extern void ata_wait_after_reset(struct ata_port *ap, unsigned long deadline);
d4b2bab4 831extern int ata_wait_ready(struct ata_port *ap, unsigned long deadline);
65f27f38 832extern void ata_port_queue_task(struct ata_port *ap, work_func_t fn,
86e45b6b 833 void *data, unsigned long delay);
c22daff4
TH		 834extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
835 unsigned long interval_msec,
836 unsigned long timeout_msec);
3f19859e
TH		 837extern unsigned int ata_dev_try_classify(struct ata_device *dev, int present,
838 u8 *r_err);
67846b30 839
1da177e4
LT		 840/*
841 * Default driver ops implementations
842 */
057ace5e 843extern void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
1da177e4 844extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
9977126c
TH		 845extern void ata_tf_to_fis(const struct ata_taskfile *tf,
846 u8 pmp, int is_cmd, u8 *fis);
057ace5e 847extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
2dcb407e
JG		 848extern void ata_noop_dev_select(struct ata_port *ap, unsigned int device);
849extern void ata_std_dev_select(struct ata_port *ap, unsigned int device);
1da177e4
LT		 850extern u8 ata_check_status(struct ata_port *ap);
851extern u8 ata_altstatus(struct ata_port *ap);
057ace5e 852extern void ata_exec_command(struct ata_port *ap, const struct ata_taskfile *tf);
2dcb407e
JG		 853extern int ata_port_start(struct ata_port *ap);
854extern int ata_sff_port_start(struct ata_port *ap);
855extern irqreturn_t ata_interrupt(int irq, void *dev_instance);
0d5ff566
TH		 856extern void ata_data_xfer(struct ata_device *adev, unsigned char *buf,
857 unsigned int buflen, int write_data);
858extern void ata_data_xfer_noirq(struct ata_device *adev, unsigned char *buf,
859 unsigned int buflen, int write_data);
31cc23b3 860extern int ata_std_qc_defer(struct ata_queued_cmd *qc);
d26fc955 861extern void ata_dumb_qc_prep(struct ata_queued_cmd *qc);
1da177e4 862extern void ata_qc_prep(struct ata_queued_cmd *qc);
e46834cd 863extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
9a3d9eb0 864extern unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc);
1da177e4
LT		 865extern void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf,
866 unsigned int buflen);
867extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
868 unsigned int n_elem);
057ace5e 869extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
10305f0f 870extern void ata_dev_disable(struct ata_device *adev);
6a62a04d
TH		 871extern void ata_id_string(const u16 *id, unsigned char *s,
872 unsigned int ofs, unsigned int len);
873extern void ata_id_c_string(const u16 *id, unsigned char *s,
874 unsigned int ofs, unsigned int len);
10305f0f 875extern void ata_id_to_dma_mode(struct ata_device *dev, u8 unknown);
2dcb407e
JG		 876extern void ata_bmdma_setup(struct ata_queued_cmd *qc);
877extern void ata_bmdma_start(struct ata_queued_cmd *qc);
b73fc89f 878extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
1da177e4
LT		 879extern u8 ata_bmdma_status(struct ata_port *ap);
880extern void ata_bmdma_irq_clear(struct ata_port *ap);
6d97dbd7
TH		 881extern void ata_bmdma_freeze(struct ata_port *ap);
882extern void ata_bmdma_thaw(struct ata_port *ap);
f5914a46 883extern void ata_bmdma_drive_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
6d97dbd7
TH		 884 ata_reset_fn_t softreset,
885 ata_reset_fn_t hardreset,
886 ata_postreset_fn_t postreset);
887extern void ata_bmdma_error_handler(struct ata_port *ap);
888extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc);
9a1004d0
TH		 889extern int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
890 u8 status, int in_wq);
f686bcb8 891extern void ata_qc_complete(struct ata_queued_cmd *qc);
dedaf2b0
TH		 892extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active,
893 void (*finish_qc)(struct ata_queued_cmd *));
3373efd8 894extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
1da177e4
LT		 895 void (*done)(struct scsi_cmnd *));
896extern int ata_std_bios_param(struct scsi_device *sdev,
897 struct block_device *bdev,
898 sector_t capacity, int geom[]);
899extern int ata_scsi_slave_config(struct scsi_device *sdev);
83c47bcb 900extern void ata_scsi_slave_destroy(struct scsi_device *sdev);
a6e6ce8e
TH		 901extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
902 int queue_depth);
3373efd8 903extern struct ata_device *ata_dev_pair(struct ata_device *adev);
0260731f 904extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev);
83625006 905extern u8 ata_irq_on(struct ata_port *ap);
1da177e4 906
be0d18df
AC		 907extern int ata_cable_40wire(struct ata_port *ap);
908extern int ata_cable_80wire(struct ata_port *ap);
909extern int ata_cable_sata(struct ata_port *ap);
910extern int ata_cable_unknown(struct ata_port *ap);
911
452503f9
AC		 912/*
913 * Timing helpers
914 */
1bc4ccff
AC		 915
916extern unsigned int ata_pio_need_iordy(const struct ata_device *);
452503f9
AC		 917extern int ata_timing_compute(struct ata_device *, unsigned short,
918 struct ata_timing *, int, int);
919extern void ata_timing_merge(const struct ata_timing *,
920 const struct ata_timing *, struct ata_timing *,
921 unsigned int);
922
923enum {
924 ATA_TIMING_SETUP = (1 << 0),
925 ATA_TIMING_ACT8B = (1 << 1),
926 ATA_TIMING_REC8B = (1 << 2),
927 ATA_TIMING_CYC8B = (1 << 3),
928 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
929 ATA_TIMING_CYC8B,
930 ATA_TIMING_ACTIVE = (1 << 4),
931 ATA_TIMING_RECOVER = (1 << 5),
932 ATA_TIMING_CYCLE = (1 << 6),
933 ATA_TIMING_UDMA = (1 << 7),
934 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
935 ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
936 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
937 ATA_TIMING_CYCLE | ATA_TIMING_UDMA,
938};
939
e1ddb4b6
AC		 940/* libata-acpi.c */
941#ifdef CONFIG_ATA_ACPI
942extern int ata_acpi_cbl_80wire(struct ata_port *ap);
0d02f0b2
TH		 943int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm);
944int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *stm);
e1ddb4b6
AC		 945#else
946static inline int ata_acpi_cbl_80wire(struct ata_port *ap) { return 0; }
947#endif
1da177e4
LT		 948
949#ifdef CONFIG_PCI
2855568b
JG		 950struct pci_dev;
951
2dcb407e 952extern int ata_pci_init_one(struct pci_dev *pdev,
2855568b 953 const struct ata_port_info * const * ppi);
2dcb407e 954extern void ata_pci_remove_one(struct pci_dev *pdev);
2855568b
JG		 955#ifdef CONFIG_PM
956extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg);
957extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev);
958extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
959extern int ata_pci_device_resume(struct pci_dev *pdev);
960#endif
961extern int ata_pci_clear_simplex(struct pci_dev *pdev);
962
1da177e4
LT		 963struct pci_bits {
964 unsigned int reg; /* PCI config register to read */
965 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
966 unsigned long mask;
967 unsigned long val;
968};
969
d583bc18 970extern int ata_pci_init_sff_host(struct ata_host *host);
1626aeb8 971extern int ata_pci_init_bmdma(struct ata_host *host);
d583bc18
TH		 972extern int ata_pci_prepare_sff_host(struct pci_dev *pdev,
973 const struct ata_port_info * const * ppi,
974 struct ata_host **r_host);
057ace5e 975extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
a76b62ca 976extern unsigned long ata_pci_default_filter(struct ata_device *, unsigned long);
1da177e4
LT		 977#endif /* CONFIG_PCI */
978
3af9a77a
TH		 979/*
980 * PMP
981 */
31f88384 982extern int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc);
3af9a77a
TH		 983extern int sata_pmp_std_prereset(struct ata_link *link, unsigned long deadline);
984extern int sata_pmp_std_hardreset(struct ata_link *link, unsigned int *class,
985 unsigned long deadline);
986extern void sata_pmp_std_postreset(struct ata_link *link, unsigned int *class);
987extern void sata_pmp_do_eh(struct ata_port *ap,
988 ata_prereset_fn_t prereset, ata_reset_fn_t softreset,
989 ata_reset_fn_t hardreset, ata_postreset_fn_t postreset,
990 ata_prereset_fn_t pmp_prereset, ata_reset_fn_t pmp_softreset,
991 ata_reset_fn_t pmp_hardreset, ata_postreset_fn_t pmp_postreset);
992
ece1d636
TH		 993/*
994 * EH
995 */
7b70fc03 996extern void ata_port_schedule_eh(struct ata_port *ap);
dbd82616 997extern int ata_link_abort(struct ata_link *link);
7b70fc03 998extern int ata_port_abort(struct ata_port *ap);
e3180499 999extern int ata_port_freeze(struct ata_port *ap);
7d77b247 1000extern int sata_async_notification(struct ata_port *ap);
e3180499
TH		 1001
1002extern void ata_eh_freeze_port(struct ata_port *ap);
1003extern void ata_eh_thaw_port(struct ata_port *ap);
7b70fc03 1004
ece1d636
TH		 1005extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
1006extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
1007
f5914a46
TH		 1008extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
1009 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
1010 ata_postreset_fn_t postreset);
022bdb07 1011
61440db6
TH		 1012/*
1013 * printk helpers
1014 */
1015#define ata_port_printk(ap, lv, fmt, args...) \
c2e366a1 1016 printk("%sata%u: "fmt, lv, (ap)->print_id , ##args)
61440db6 1017
8989805d
TH		 1018#define ata_link_printk(link, lv, fmt, args...) do { \
1019 if ((link)->ap->nr_pmp_links) \
c2e366a1 1020 printk("%sata%u.%02u: "fmt, lv, (link)->ap->print_id, \
8989805d
TH		 1021 (link)->pmp , ##args); \
1022 else \
c2e366a1 1023 printk("%sata%u: "fmt, lv, (link)->ap->print_id , ##args); \
8989805d 1024 } while(0)
9af5c9c9 1025
61440db6 1026#define ata_dev_printk(dev, lv, fmt, args...) \
c2e366a1 1027 printk("%sata%u.%02u: "fmt, lv, (dev)->link->ap->print_id, \
8989805d 1028 (dev)->link->pmp + (dev)->devno , ##args)
1da177e4 1029
f3e81b19
TH		 1030/*
1031 * ata_eh_info helpers
1032 */
cb94c1cf
TH		 1033extern void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...)
1034 __attribute__ ((format (printf, 2, 3)));
1035extern void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...)
1036 __attribute__ ((format (printf, 2, 3)));
b64bbc39 1037extern void ata_ehi_clear_desc(struct ata_eh_info *ehi);
f3e81b19 1038
f8f1e1cc 1039static inline void ata_ehi_schedule_probe(struct ata_eh_info *ehi)
084fe639 1040{
f8f1e1cc 1041 ehi->flags |= ATA_EHI_RESUME_LINK;
084fe639
TH		 1042 ehi->action |= ATA_EH_SOFTRESET;
1043 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
1044}
1045
c0b6c037
TH		 1046static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
1047{
f8f1e1cc
TH		 1048 ata_ehi_schedule_probe(ehi);
1049 ehi->flags |= ATA_EHI_HOTPLUGGED;
f9df58cb 1050 ehi->action |= ATA_EH_ENABLE_LINK;
c0b6c037
TH		 1051 ehi->err_mask |= AC_ERR_ATA_BUS;
1052}
1053
cbcdd875
TH		 1054/*
1055 * port description helpers
1056 */
1057extern void ata_port_desc(struct ata_port *ap, const char *fmt, ...)
1058 __attribute__ ((format (printf, 2, 3)));
1059#ifdef CONFIG_PCI
1060extern void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset,
1061 const char *name);
1062#endif
1063
61440db6
TH		 1064/*
1065 * qc helpers
1066 */
cc1887f3
TH		 1067static inline struct scatterlist *
1068ata_qc_first_sg(struct ata_queued_cmd *qc)
1069{
87260216 1070 qc->n_iter = 0;
cc1887f3
TH		 1071 if (qc->n_elem)
1072 return qc->__sg;
1073 if (qc->pad_len)
1074 return &qc->pad_sgent;
1075 return NULL;
1076}
1077
cedc9a47
JG		 1078static inline struct scatterlist *
1079ata_qc_next_sg(struct scatterlist *sg, struct ata_queued_cmd *qc)
1080{
1081 if (sg == &qc->pad_sgent)
1082 return NULL;
87260216
JA		 1083 if (++qc->n_iter < qc->n_elem)
1084 return sg_next(sg);
cc1887f3
TH		 1085 if (qc->pad_len)
1086 return &qc->pad_sgent;
1087 return NULL;
cedc9a47
JG		 1088}
1089
1090#define ata_for_each_sg(sg, qc) \
cc1887f3 1091 for (sg = ata_qc_first_sg(qc); sg; sg = ata_qc_next_sg(sg, qc))
cedc9a47 1092
1da177e4
LT		 1093static inline unsigned int ata_tag_valid(unsigned int tag)
1094{
1095 return (tag < ATA_MAX_QUEUE) ? 1 : 0;
1096}
1097
2ab7db1f
TH		 1098static inline unsigned int ata_tag_internal(unsigned int tag)
1099{
1100 return tag == ATA_MAX_QUEUE - 1;
1101}
1102
5806db22
TH		 1103/*
1104 * device helpers
1105 */
e1211e3f 1106static inline unsigned int ata_class_enabled(unsigned int class)
597afd21 1107{
e0a71752
TH		 1108 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI ||
1109 class == ATA_DEV_PMP || class == ATA_DEV_SEMB;
597afd21
TH		 1110}
1111
e1211e3f 1112static inline unsigned int ata_class_disabled(unsigned int class)
1da177e4 1113{
e0a71752
TH		 1114 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP ||
1115 class == ATA_DEV_PMP_UNSUP || class == ATA_DEV_SEMB_UNSUP;
e1211e3f
TH		 1116}
1117
002c8054
TH		 1118static inline unsigned int ata_class_absent(unsigned int class)
1119{
1120 return !ata_class_enabled(class) && !ata_class_disabled(class);
1121}
1122
e1211e3f
TH		 1123static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
1124{
1125 return ata_class_enabled(dev->class);
1126}
1127
1128static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
1129{
1130 return ata_class_disabled(dev->class);
1da177e4
LT		 1131}
1132
002c8054
TH		 1133static inline unsigned int ata_dev_absent(const struct ata_device *dev)
1134{
1135 return ata_class_absent(dev->class);
1136}
1137
5806db22 1138/*
f58229f8 1139 * link helpers
5806db22 1140 */
8989805d
TH		 1141static inline int ata_is_host_link(const struct ata_link *link)
1142{
1143 return link == &link->ap->link;
1144}
1145
f58229f8 1146static inline int ata_link_max_devices(const struct ata_link *link)
5806db22 1147{
8989805d 1148 if (ata_is_host_link(link) && link->ap->flags & ATA_FLAG_SLAVE_POSS)
5806db22
TH		 1149 return 2;
1150 return 1;
1151}
1152
da917d69
TH		 1153static inline int ata_link_active(struct ata_link *link)
1154{
1155 return ata_tag_valid(link->active_tag) || link->sactive;
1156}
1157
8989805d
TH		 1158static inline struct ata_link *ata_port_first_link(struct ata_port *ap)
1159{
1160 if (ap->nr_pmp_links)
1161 return ap->pmp_link;
1162 return &ap->link;
1163}
1164
1165static inline struct ata_link *ata_port_next_link(struct ata_link *link)
1166{
1167 struct ata_port *ap = link->ap;
1168
1169 if (link == &ap->link) {
1170 if (!ap->nr_pmp_links)
1171 return NULL;
1172 return ap->pmp_link;
1173 }
1174
1175 if (++link - ap->pmp_link < ap->nr_pmp_links)
1176 return link;
1177 return NULL;
1178}
1179
1180#define __ata_port_for_each_link(lk, ap) \
1181 for ((lk) = &(ap)->link; (lk); (lk) = ata_port_next_link(lk))
1182
1183#define ata_port_for_each_link(link, ap) \
1184 for ((link) = ata_port_first_link(ap); (link); \
1185 (link) = ata_port_next_link(link))
f58229f8
TH		 1186
1187#define ata_link_for_each_dev(dev, link) \
1188 for ((dev) = (link)->device; \
1189 (dev) < (link)->device + ata_link_max_devices(link) || ((dev) = NULL); \
1190 (dev)++)
1191
1192#define ata_link_for_each_dev_reverse(dev, link) \
1193 for ((dev) = (link)->device + ata_link_max_devices(link) - 1; \
1194 (dev) >= (link)->device || ((dev) = NULL); (dev)--)
5806db22 1195
1da177e4
LT		 1196static inline u8 ata_chk_status(struct ata_port *ap)
1197{
1198 return ap->ops->check_status(ap);
1199}
1200
6d1245bf
TH		 1201/**
1202 * ata_ncq_enabled - Test whether NCQ is enabled
1203 * @dev: ATA device to test for
1204 *
1205 * LOCKING:
1206 * spin_lock_irqsave(host lock)
1207 *
1208 * RETURNS:
1209 * 1 if NCQ is enabled for @dev, 0 otherwise.
1210 */
1211static inline int ata_ncq_enabled(struct ata_device *dev)
1212{
1213 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF |
1214 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ;
1215}
0baab86b
EF		 1216
1217/**
1218 * ata_pause - Flush writes and pause 400 nanoseconds.
1219 * @ap: Port to wait for.
1220 *
1221 * LOCKING:
1222 * Inherited from caller.
1223 */
1224
1da177e4
LT		 1225static inline void ata_pause(struct ata_port *ap)
1226{
1227 ata_altstatus(ap);
1228 ndelay(400);
1229}
1230
0baab86b
EF		 1231
1232/**
1233 * ata_busy_wait - Wait for a port status register
1234 * @ap: Port to wait for.
0777721c
A		 1235 * @bits: bits that must be clear
1236 * @max: number of 10uS waits to perform
0baab86b
EF		 1237 *
1238 * Waits up to max*10 microseconds for the selected bits in the port's
1239 * status register to be cleared.
1240 * Returns final value of status register.
1241 *
1242 * LOCKING:
1243 * Inherited from caller.
1244 */
1245
1da177e4
LT		 1246static inline u8 ata_busy_wait(struct ata_port *ap, unsigned int bits,
1247 unsigned int max)
1248{
1249 u8 status;
1250
1251 do {
1252 udelay(10);
1253 status = ata_chk_status(ap);
1254 max--;
d1adc1bb 1255 } while (status != 0xff && (status & bits) && (max > 0));
1da177e4
LT		 1256
1257 return status;
1258}
1259
0baab86b
EF		 1260
1261/**
1262 * ata_wait_idle - Wait for a port to be idle.
1263 * @ap: Port to wait for.
1264 *
1265 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
1266 * Returns final value of status register.
1267 *
1268 * LOCKING:
1269 * Inherited from caller.
1270 */
1271
1da177e4
LT		 1272static inline u8 ata_wait_idle(struct ata_port *ap)
1273{
1274 u8 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
1275
15529456 1276#ifdef ATA_DEBUG
55f3952d 1277 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ)))
15529456
TH		 1278 ata_port_printk(ap, KERN_DEBUG, "abnormal Status 0x%X\n",
1279 status);
1280#endif
1da177e4
LT		 1281
1282 return status;
1283}
1284
1285static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
1286{
1287 qc->tf.ctl |= ATA_NIEN;
1288}
1289
f69499f4
TH		 1290static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap,
1291 unsigned int tag)
1da177e4
LT		 1292{
1293 if (likely(ata_tag_valid(tag)))
1294 return &ap->qcmd[tag];
1295 return NULL;
1296}
1297
f69499f4
TH		 1298static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap,
1299 unsigned int tag)
1300{
1301 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
1302
1303 if (unlikely(!qc) || !ap->ops->error_handler)
1304 return qc;
1305
1306 if ((qc->flags & (ATA_QCFLAG_ACTIVE |
1307 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE)
1308 return qc;
1309
1310 return NULL;
1311}
1312
3373efd8 1313static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
1da177e4
LT		 1314{
1315 memset(tf, 0, sizeof(*tf));
1316
9af5c9c9 1317 tf->ctl = dev->link->ap->ctl;
3373efd8 1318 if (dev->devno == 0)
1da177e4
LT		 1319 tf->device = ATA_DEVICE_OBS;
1320 else
1321 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
1322}
1323
2c13b7ce
JG		 1324static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
1325{
501e0c50 1326 qc->dma_dir = DMA_NONE;
2c13b7ce
JG		 1327 qc->__sg = NULL;
1328 qc->flags = 0;
87260216
JA		 1329 qc->cursg = NULL;
1330 qc->cursg_ofs = 0;
2c13b7ce 1331 qc->nbytes = qc->curbytes = 0;
7a801184 1332 qc->n_elem = 0;
87260216 1333 qc->n_iter = 0;
a22e2eb0 1334 qc->err_mask = 0;
d0f29485 1335 qc->pad_len = 0;
5a5dbd18 1336 qc->sect_size = ATA_SECT_SIZE;
2c13b7ce 1337
3373efd8 1338 ata_tf_init(qc->dev, &qc->tf);
e61e0672
TH		 1339
1340 /* init result_tf such that it indicates normal completion */
1341 qc->result_tf.command = ATA_DRDY;
1342 qc->result_tf.feature = 0;
2c13b7ce
JG		 1343}
1344
057ace5e 1345static inline int ata_try_flush_cache(const struct ata_device *dev)
1da177e4
LT		 1346{
1347 return ata_id_wcache_enabled(dev->id) ||
1348 ata_id_has_flush(dev->id) ||
1349 ata_id_has_flush_ext(dev->id);
1350}
1351
a7dac447
JG		 1352static inline unsigned int ac_err_mask(u8 status)
1353{
3655d1d3 1354 if (status & (ATA_BUSY | ATA_DRQ))
11a56d24 1355 return AC_ERR_HSM;
a7dac447
JG		 1356 if (status & (ATA_ERR | ATA_DF))
1357 return AC_ERR_DEV;
1358 return 0;
1359}
1360
1361static inline unsigned int __ac_err_mask(u8 status)
1362{
1363 unsigned int mask = ac_err_mask(status);
1364 if (mask == 0)
1365 return AC_ERR_OTHER;
1366 return mask;
1367}
1368
6037d6bb
JG		 1369static inline int ata_pad_alloc(struct ata_port *ap, struct device *dev)
1370{
1371 ap->pad_dma = 0;
f0d36efd
TH		 1372 ap->pad = dmam_alloc_coherent(dev, ATA_DMA_PAD_BUF_SZ,
1373 &ap->pad_dma, GFP_KERNEL);
6037d6bb
JG		 1374 return (ap->pad == NULL) ? -ENOMEM : 0;
1375}
1376
1377static inline void ata_pad_free(struct ata_port *ap, struct device *dev)
1378{
f0d36efd 1379 dmam_free_coherent(dev, ATA_DMA_PAD_BUF_SZ, ap->pad, ap->pad_dma);
6037d6bb
JG		 1380}
1381
35bb94b1
JG		 1382static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
1383{
4911487a 1384 return *(struct ata_port **)&host->hostdata[0];
35bb94b1
JG		 1385}
1386
1da177e4 1387#endif /* __LINUX_LIBATA_H__ */
Linux kernel - Deliverables
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