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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg...
[net-next-2.6.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>
341c2c95 30#include <linux/jiffies.h>
1da177e4 31#include <linux/interrupt.h>
1c72d8d9 32#include <linux/dma-mapping.h>
87260216 33#include <linux/scatterlist.h>
f0d36efd 34#include <linux/io.h>
1da177e4
LT		 35#include <linux/ata.h>
36#include <linux/workqueue.h>
35bb94b1 37#include <scsi/scsi_host.h>
11ef697b 38#include <linux/acpi.h>
ceb0c642 39#include <linux/cdrom.h>
1da177e4 40
a6d967a4
JG		 41/*
42 * Define if arch has non-standard setup. This is a _PCI_ standard
43 * not a legacy or ISA standard.
44 */
45#ifdef CONFIG_ATA_NONSTANDARD
2ec7df04 46#include <asm/libata-portmap.h>
a6d967a4
JG		 47#else
48#include <asm-generic/libata-portmap.h>
49#endif
2ec7df04 50
1da177e4 51/*
bfd60579
RD		 52 * compile-time options: to be removed as soon as all the drivers are
53 * converted to the new debugging mechanism
1da177e4
LT		 54 */
55#undef ATA_DEBUG /* debugging output */
56#undef ATA_VERBOSE_DEBUG /* yet more debugging output */
57#undef ATA_IRQ_TRAP /* define to ack screaming irqs */
58#undef ATA_NDEBUG /* define to disable quick runtime checks */
1da177e4
LT		 59
60
61/* note: prints function name for you */
62#ifdef ATA_DEBUG
1f938d06 63#define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args)
1da177e4 64#ifdef ATA_VERBOSE_DEBUG
1f938d06 65#define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args)
1da177e4
LT		 66#else
67#define VPRINTK(fmt, args...)
68#endif /* ATA_VERBOSE_DEBUG */
69#else
70#define DPRINTK(fmt, args...)
71#define VPRINTK(fmt, args...)
72#endif /* ATA_DEBUG */
73
1f938d06 74#define BPRINTK(fmt, args...) if (ap->flags & ATA_FLAG_DEBUGMSG) printk(KERN_ERR "%s: " fmt, __func__, ## args)
2c13b7ce 75
bfd60579
RD		 76/* NEW: debug levels */
77#define HAVE_LIBATA_MSG 1
78
79enum {
80 ATA_MSG_DRV = 0x0001,
81 ATA_MSG_INFO = 0x0002,
82 ATA_MSG_PROBE = 0x0004,
83 ATA_MSG_WARN = 0x0008,
84 ATA_MSG_MALLOC = 0x0010,
85 ATA_MSG_CTL = 0x0020,
86 ATA_MSG_INTR = 0x0040,
87 ATA_MSG_ERR = 0x0080,
88};
89
90#define ata_msg_drv(p) ((p)->msg_enable & ATA_MSG_DRV)
91#define ata_msg_info(p) ((p)->msg_enable & ATA_MSG_INFO)
92#define ata_msg_probe(p) ((p)->msg_enable & ATA_MSG_PROBE)
93#define ata_msg_warn(p) ((p)->msg_enable & ATA_MSG_WARN)
94#define ata_msg_malloc(p) ((p)->msg_enable & ATA_MSG_MALLOC)
95#define ata_msg_ctl(p) ((p)->msg_enable & ATA_MSG_CTL)
96#define ata_msg_intr(p) ((p)->msg_enable & ATA_MSG_INTR)
97#define ata_msg_err(p) ((p)->msg_enable & ATA_MSG_ERR)
98
99static inline u32 ata_msg_init(int dval, int default_msg_enable_bits)
100{
101 if (dval < 0 || dval >= (sizeof(u32) * 8))
102 return default_msg_enable_bits; /* should be 0x1 - only driver info msgs */
103 if (!dval)
104 return 0;
105 return (1 << dval) - 1;
106}
107
1da177e4
LT		 108/* defines only for the constants which don't work well as enums */
109#define ATA_TAG_POISON 0xfafbfcfdU
110
1da177e4
LT		 111enum {
112 /* various global constants */
113 LIBATA_MAX_PRD = ATA_MAX_PRD / 2,
d26fc955 114 LIBATA_DUMB_MAX_PRD = ATA_MAX_PRD / 4, /* Worst case */
1da177e4 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,
341c2c95 119 ATA_SHORT_PAUSE = 16,
1da177e4 120
140b5e59
TH		 121 ATAPI_MAX_DRAIN = 16 << 10,
122
b558eddd
TH		 123 ATA_ALL_DEVICES = (1 << ATA_MAX_DEVICES) - 1,
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 */
91163006 141 ATA_DFLAG_DMADIR = (1 << 10), /* device requires DMADIR */
2557164e 142 ATA_DFLAG_CFG_MASK = (1 << 12) - 1,
949b38af 143
2557164e
KCA		 144 ATA_DFLAG_PIO = (1 << 12), /* device limited to PIO mode */
145 ATA_DFLAG_NCQ_OFF = (1 << 13), /* device limited to non-NCQ mode */
146 ATA_DFLAG_SPUNDOWN = (1 << 14), /* XXX: for spindown_compat */
054a5fba 147 ATA_DFLAG_SLEEPING = (1 << 15), /* device is sleeping */
00115e0f 148 ATA_DFLAG_DUBIOUS_XFER = (1 << 16), /* data transfer not verified */
45fabbb7 149 ATA_DFLAG_NO_UNLOAD = (1 << 17), /* device doesn't support unload */
f20ded38 150 ATA_DFLAG_INIT_MASK = (1 << 24) - 1,
1da177e4 151
f20ded38
TH		 152 ATA_DFLAG_DETACH = (1 << 24),
153 ATA_DFLAG_DETACHED = (1 << 25),
abdda733 154
1da177e4
LT		 155 ATA_DEV_UNKNOWN = 0, /* unknown device */
156 ATA_DEV_ATA = 1, /* ATA device */
157 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */
158 ATA_DEV_ATAPI = 3, /* ATAPI device */
159 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */
e0a71752
TH		 160 ATA_DEV_PMP = 5, /* SATA port multiplier */
161 ATA_DEV_PMP_UNSUP = 6, /* SATA port multiplier (unsupported) */
162 ATA_DEV_SEMB = 7, /* SEMB */
163 ATA_DEV_SEMB_UNSUP = 8, /* SEMB (unsupported) */
164 ATA_DEV_NONE = 9, /* no device */
1da177e4 165
0c88758b 166 /* struct ata_link flags */
05944bdf 167 ATA_LFLAG_NO_HRST = (1 << 1), /* avoid hardreset */
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 */
18f7ba4c 174 ATA_LFLAG_SW_ACTIVITY = (1 << 7), /* keep activity stats */
0c88758b 175
1da177e4 176 /* struct ata_port flags */
949b38af 177 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */
1da177e4 178 /* (doesn't imply presence) */
949b38af
TH		 179 ATA_FLAG_SATA = (1 << 1),
180 ATA_FLAG_NO_LEGACY = (1 << 2), /* no legacy mode check */
181 ATA_FLAG_MMIO = (1 << 3), /* use MMIO, not PIO */
182 ATA_FLAG_SRST = (1 << 4), /* (obsolete) use ATA SRST, not E.D.D. */
183 ATA_FLAG_SATA_RESET = (1 << 5), /* (obsolete) use COMRESET */
184 ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */
185 ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */
186 ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */
7395acb2
TH		 187 ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD
188 * doesn't handle PIO interrupts */
189 ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */
2a6e58d2
RW		 190 ATA_FLAG_NO_POWEROFF_SPINDOWN = (1 << 11), /* don't spindown before poweroff */
191 ATA_FLAG_NO_HIBERNATE_SPINDOWN = (1 << 12), /* don't spindown before hibernation */
7395acb2 192 ATA_FLAG_DEBUGMSG = (1 << 13),
b2a8bbe6 193 ATA_FLAG_IGN_SIMPLEX = (1 << 15), /* ignore SIMPLEX */
f834e49f 194 ATA_FLAG_NO_IORDY = (1 << 16), /* controller lacks iordy */
3cadbcc0 195 ATA_FLAG_ACPI_SATA = (1 << 17), /* need native SATA ACPI layout */
9f45cbd3 196 ATA_FLAG_AN = (1 << 18), /* controller supports AN */
e0a71752 197 ATA_FLAG_PMP = (1 << 19), /* controller supports PMP */
ca77329f 198 ATA_FLAG_IPM = (1 << 20), /* driver can handle IPM */
18f7ba4c
KCA		 199 ATA_FLAG_EM = (1 << 21), /* driver supports enclosure
200 * management */
201 ATA_FLAG_SW_ACTIVITY = (1 << 22), /* driver supports sw activity
202 * led */
949b38af 203
b51e9e5d
TH		 204 /* The following flag belongs to ap->pflags but is kept in
205 * ap->flags because it's referenced in many LLDs and will be
206 * removed in not-too-distant future.
207 */
208 ATA_FLAG_DISABLED = (1 << 23), /* port is disabled, ignore it */
209
210 /* bits 24:31 of ap->flags are reserved for LLD specific flags */
9ec957f2 211
b51e9e5d
TH		 212 /* struct ata_port pflags */
213 ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */
214 ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */
215 ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */
216 ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */
217 ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */
b51e9e5d 218 ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */
f4d6d004 219 ATA_PFLAG_INITIALIZING = (1 << 7), /* being initialized, don't touch */
afaa5c37 220 ATA_PFLAG_RESETTING = (1 << 8), /* reset in progress */
ece180d1
TH		 221 ATA_PFLAG_UNLOADING = (1 << 9), /* driver is being unloaded */
222 ATA_PFLAG_UNLOADED = (1 << 10), /* driver is unloaded */
949b38af 223
b51e9e5d 224 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */
500530f6 225 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */
c05e6ff0 226 ATA_PFLAG_INIT_GTM_VALID = (1 << 19), /* initial gtm data valid */
949b38af
TH		 227
228 /* struct ata_queued_cmd flags */
229 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */
001102d7 230 ATA_QCFLAG_DMAMAP = (1 << 1), /* SG table is DMA mapped */
27197367 231 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */
e61e0672 232 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */
da917d69 233 ATA_QCFLAG_CLEAR_EXCL = (1 << 5), /* clear excl_link on completion */
e027bd36 234 ATA_QCFLAG_QUIET = (1 << 6), /* don't report device error */
03faab78 235 ATA_QCFLAG_RETRY = (1 << 7), /* retry after failure */
e61e0672 236
9ec957f2
TH		 237 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */
238 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */
239 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */
1da177e4 240
4e5ec5db 241 /* host set flags */
cca3974e 242 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */
ecef7253 243 ATA_HOST_STARTED = (1 << 1), /* Host started */
886ad09f 244 ATA_HOST_PARALLEL_SCAN = (1 << 2), /* Ports on this host can be scanned in parallel */
9bec2e38 245
b8b275ef
TH		 246 /* bits 24:31 of host->flags are reserved for LLD specific flags */
247
1da177e4 248 /* various lengths of time */
341c2c95
TH		 249 ATA_TMOUT_BOOT = 30000, /* heuristic */
250 ATA_TMOUT_BOOT_QUICK = 7000, /* heuristic */
341c2c95 251 ATA_TMOUT_INTERNAL_QUICK = 5000,
45fabbb7 252 ATA_TMOUT_MAX_PARK = 30000,
1da177e4 253
88ff6eaf
TH		 254 /* FIXME: GoVault needs 2s but we can't afford that without
255 * parallel probing. 800ms is enough for iVDR disk
256 * HHD424020F7SV00. Increase to 2secs when parallel probing
257 * is in place.
258 */
341c2c95 259 ATA_TMOUT_FF_WAIT = 800,
88ff6eaf 260
705e76be
TH		 261 /* Spec mandates to wait for ">= 2ms" before checking status
262 * after reset. We wait 150ms, because that was the magic
263 * delay used for ATAPI devices in Hale Landis's ATADRVR, for
264 * the period of time between when the ATA command register is
265 * written, and then status is checked. Because waiting for
266 * "a while" before checking status is fine, post SRST, we
267 * perform this magic delay here as well.
268 *
269 * Old drivers/ide uses the 2mS rule and then waits for ready.
270 */
341c2c95 271 ATA_WAIT_AFTER_RESET = 150,
705e76be 272
9dadd45b
TH		 273 /* If PMP is supported, we have to do follow-up SRST. As some
274 * PMPs don't send D2H Reg FIS after hardreset, LLDs are
275 * advised to wait only for the following duration before
276 * doing SRST.
277 */
341c2c95 278 ATA_TMOUT_PMP_SRST_WAIT = 1000,
9dadd45b 279
1da177e4
LT		 280 /* ATA bus states */
281 BUS_UNKNOWN = 0,
282 BUS_DMA = 1,
283 BUS_IDLE = 2,
284 BUS_NOINTR = 3,
285 BUS_NODATA = 4,
286 BUS_TIMER = 5,
287 BUS_PIO = 6,
288 BUS_EDD = 7,
289 BUS_IDENTIFY = 8,
290 BUS_PACKET = 9,
291
292 /* SATA port states */
293 PORT_UNKNOWN = 0,
294 PORT_ENABLED = 1,
295 PORT_DISABLED = 2,
296
297 /* encoding various smaller bitmaps into a single
7dc951ae 298 * unsigned long bitmap
1da177e4 299 */
70cd071e
TH		 300 ATA_NR_PIO_MODES = 7,
301 ATA_NR_MWDMA_MODES = 5,
302 ATA_NR_UDMA_MODES = 8,
1da7b0d0
TH		 303
304 ATA_SHIFT_PIO = 0,
70cd071e
TH		 305 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_NR_PIO_MODES,
306 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_NR_MWDMA_MODES,
307
cedc9a47
JG		 308 /* size of buffer to pad xfers ending on unaligned boundaries */
309 ATA_DMA_PAD_SZ = 4,
949b38af 310
0c247c55
TH		 311 /* ering size */
312 ATA_ERING_SIZE = 32,
313
31cc23b3
TH		 314 /* return values for ->qc_defer */
315 ATA_DEFER_LINK = 1,
316 ATA_DEFER_PORT = 2,
317
f3e81b19
TH		 318 /* desc_len for ata_eh_info and context */
319 ATA_EH_DESC_LEN = 80,
320
9be1e979
TH		 321 /* reset / recovery action types */
322 ATA_EH_REVALIDATE = (1 << 0),
cf480626
TH		 323 ATA_EH_SOFTRESET = (1 << 1), /* meaningful only in ->prereset */
324 ATA_EH_HARDRESET = (1 << 2), /* meaningful only in ->prereset */
325 ATA_EH_RESET = ATA_EH_SOFTRESET | ATA_EH_HARDRESET,
f9df58cb 326 ATA_EH_ENABLE_LINK = (1 << 3),
3ec25ebd 327 ATA_EH_LPM = (1 << 4), /* link power management action */
45fabbb7 328 ATA_EH_PARK = (1 << 5), /* unload heads and stop I/O */
9be1e979 329
45fabbb7 330 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE | ATA_EH_PARK,
b5b3fa38
TH		 331 ATA_EH_ALL_ACTIONS = ATA_EH_REVALIDATE | ATA_EH_RESET |
332 ATA_EH_ENABLE_LINK | ATA_EH_LPM,
9be1e979 333
f3e81b19 334 /* ata_eh_info->flags */
abdda733 335 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */
1cdaf534
TH		 336 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */
337 ATA_EHI_QUIET = (1 << 3), /* be quiet */
abdda733 338
0d64a233
TH		 339 ATA_EHI_DID_SOFTRESET = (1 << 16), /* already soft-reset this port */
340 ATA_EHI_DID_HARDRESET = (1 << 17), /* already soft-reset this port */
341 ATA_EHI_PRINTINFO = (1 << 18), /* print configuration info */
342 ATA_EHI_SETMODE = (1 << 19), /* configure transfer mode */
343 ATA_EHI_POST_SETMODE = (1 << 20), /* revaildating after setmode */
f3e81b19 344
0d64a233 345 ATA_EHI_DID_RESET = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET,
13abf50d 346
848e4c68
TH		 347 /* mask of flags to transfer *to* the slave link */
348 ATA_EHI_TO_SLAVE_MASK = ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET,
349
a1e10f7e
TH		 350 /* max tries if error condition is still set after ->error_handler */
351 ATA_EH_MAX_TRIES = 5,
ad9e2762 352
14d2bac1
TH		 353 /* how hard are we gonna try to probe/recover devices */
354 ATA_PROBE_MAX_TRIES = 3,
022bdb07 355 ATA_EH_DEV_TRIES = 3,
e0a71752
TH		 356 ATA_EH_PMP_TRIES = 5,
357 ATA_EH_PMP_LINK_TRIES = 3,
358
bf1bff6f 359 SATA_PMP_RW_TIMEOUT = 3000, /* PMP read/write timeout */
f5914a46 360
87fbc5a0
TH		 361 /* This should match the actual table size of
362 * ata_eh_cmd_timeout_table in libata-eh.c.
363 */
364 ATA_EH_CMD_TIMEOUT_TABLE_SIZE = 5,
365
93590859
AC		 366 /* Horkage types. May be set by libata or controller on drives
367 (some horkage may be drive/controller pair dependant */
368
369 ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */
6919a0a6
AC		 370 ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */
371 ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */
18d6e9d5 372 ATA_HORKAGE_MAX_SEC_128 = (1 << 3), /* Limit max sects to 128 */
16c55b03 373 ATA_HORKAGE_BROKEN_HPA = (1 << 4), /* Broken HPA */
50af2fa1 374 ATA_HORKAGE_DISABLE = (1 << 5), /* Disable it */
93328e11 375 ATA_HORKAGE_HPA_SIZE = (1 << 6), /* native size off by one */
ca77329f 376 ATA_HORKAGE_IPM = (1 << 7), /* Link PM problems */
6bbfd53d 377 ATA_HORKAGE_IVB = (1 << 8), /* cbl det validity bit bugs */
2d3b8eea 378 ATA_HORKAGE_STUCK_ERR = (1 << 9), /* stuck ERR on next PACKET */
9ce8e307 379 ATA_HORKAGE_BRIDGE_OK = (1 << 10), /* no bridge limits */
6a87e42e
TH		 380 ATA_HORKAGE_ATAPI_MOD16_DMA = (1 << 11), /* use ATAPI DMA for commands
381 not multiple of 16 bytes */
ac70a964 382 ATA_HORKAGE_FIRMWARE_WARN = (1 << 12), /* firwmare update warning */
b3a70601 383
2dcb407e 384 /* DMA mask for user DMA control: User visible values; DO NOT
b3a70601
AC		 385 renumber */
386 ATA_DMA_MASK_ATA = (1 << 0), /* DMA on ATA Disk */
387 ATA_DMA_MASK_ATAPI = (1 << 1), /* DMA on ATAPI */
388 ATA_DMA_MASK_CFA = (1 << 2), /* DMA on CF Card */
ceb0c642
TH		 389
390 /* ATAPI command types */
391 ATAPI_READ = 0, /* READs */
392 ATAPI_WRITE = 1, /* WRITEs */
393 ATAPI_READ_CD = 2, /* READ CD [MSF] */
e52dcc48
TH		 394 ATAPI_PASS_THRU = 3, /* SAT pass-thru */
395 ATAPI_MISC = 4, /* the rest */
624d5c51
TH		 396
397 /* Timing constants */
398 ATA_TIMING_SETUP = (1 << 0),
399 ATA_TIMING_ACT8B = (1 << 1),
400 ATA_TIMING_REC8B = (1 << 2),
401 ATA_TIMING_CYC8B = (1 << 3),
402 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
403 ATA_TIMING_CYC8B,
404 ATA_TIMING_ACTIVE = (1 << 4),
405 ATA_TIMING_RECOVER = (1 << 5),
3ada9c12
DD		 406 ATA_TIMING_DMACK_HOLD = (1 << 6),
407 ATA_TIMING_CYCLE = (1 << 7),
408 ATA_TIMING_UDMA = (1 << 8),
624d5c51
TH		 409 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
410 ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
411 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
3ada9c12
DD		 412 ATA_TIMING_DMACK_HOLD | ATA_TIMING_CYCLE |
413 ATA_TIMING_UDMA,
1da177e4
LT		 414};
415
7dc951ae
TH		 416enum ata_xfer_mask {
417 ATA_MASK_PIO = ((1LU << ATA_NR_PIO_MODES) - 1)
418 << ATA_SHIFT_PIO,
419 ATA_MASK_MWDMA = ((1LU << ATA_NR_MWDMA_MODES) - 1)
420 << ATA_SHIFT_MWDMA,
421 ATA_MASK_UDMA = ((1LU << ATA_NR_UDMA_MODES) - 1)
422 << ATA_SHIFT_UDMA,
423};
424
14be71f4 425enum hsm_task_states {
c56b14d2 426 HSM_ST_IDLE, /* no command on going */
71527647
AL		 427 HSM_ST_FIRST, /* (waiting the device to)
428 write CDB or first data block */
c56b14d2
AL		 429 HSM_ST, /* (waiting the device to) transfer data */
430 HSM_ST_LAST, /* (waiting the device to) complete command */
c56b14d2 431 HSM_ST_ERR, /* error */
1da177e4
LT		 432};
433
a7dac447 434enum ata_completion_errors {
11a56d24
TH		 435 AC_ERR_DEV = (1 << 0), /* device reported error */
436 AC_ERR_HSM = (1 << 1), /* host state machine violation */
437 AC_ERR_TIMEOUT = (1 << 2), /* timeout */
438 AC_ERR_MEDIA = (1 << 3), /* media error */
439 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */
440 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */
441 AC_ERR_SYSTEM = (1 << 6), /* system error */
442 AC_ERR_INVALID = (1 << 7), /* invalid argument */
443 AC_ERR_OTHER = (1 << 8), /* unknown */
55a8e2c8 444 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */
5335b729 445 AC_ERR_NCQ = (1 << 10), /* marker for offending NCQ qc */
a7dac447
JG		 446};
447
1da177e4
LT		 448/* forward declarations */
449struct scsi_device;
450struct ata_port_operations;
451struct ata_port;
cc0680a5 452struct ata_link;
1da177e4
LT		 453struct ata_queued_cmd;
454
455/* typedefs */
77853bf2 456typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
cc0680a5
TH		 457typedef int (*ata_prereset_fn_t)(struct ata_link *link, unsigned long deadline);
458typedef int (*ata_reset_fn_t)(struct ata_link *link, unsigned int *classes,
d4b2bab4 459 unsigned long deadline);
cc0680a5 460typedef void (*ata_postreset_fn_t)(struct ata_link *link, unsigned int *classes);
1da177e4 461
ca77329f
KCA		 462/*
463 * host pm policy: If you alter this, you also need to alter libata-scsi.c
464 * (for the ascii descriptions)
465 */
466enum link_pm {
467 NOT_AVAILABLE,
468 MIN_POWER,
469 MAX_PERFORMANCE,
470 MEDIUM_POWER,
471};
ee959b00 472extern struct device_attribute dev_attr_link_power_management_policy;
45fabbb7 473extern struct device_attribute dev_attr_unload_heads;
18f7ba4c
KCA		 474extern struct device_attribute dev_attr_em_message_type;
475extern struct device_attribute dev_attr_em_message;
476extern struct device_attribute dev_attr_sw_activity;
477
478enum sw_activity {
479 OFF,
480 BLINK_ON,
481 BLINK_OFF,
482};
ca77329f 483
127102ae 484#ifdef CONFIG_ATA_SFF
1da177e4 485struct ata_ioports {
0d5ff566
TH		 486 void __iomem *cmd_addr;
487 void __iomem *data_addr;
488 void __iomem *error_addr;
489 void __iomem *feature_addr;
490 void __iomem *nsect_addr;
491 void __iomem *lbal_addr;
492 void __iomem *lbam_addr;
493 void __iomem *lbah_addr;
494 void __iomem *device_addr;
495 void __iomem *status_addr;
496 void __iomem *command_addr;
497 void __iomem *altstatus_addr;
498 void __iomem *ctl_addr;
499 void __iomem *bmdma_addr;
500 void __iomem *scr_addr;
1da177e4 501};
127102ae 502#endif /* CONFIG_ATA_SFF */
1da177e4 503
cca3974e 504struct ata_host {
1da177e4
LT		 505 spinlock_t lock;
506 struct device *dev;
0d5ff566 507 void __iomem * const *iomap;
1da177e4
LT		 508 unsigned int n_ports;
509 void *private_data;
029cfd6b 510 struct ata_port_operations *ops;
5444a6f4 511 unsigned long flags;
fafbae87
TH		 512#ifdef CONFIG_ATA_ACPI
513 acpi_handle acpi_handle;
514#endif
032af1ce 515 struct ata_port *simplex_claimed; /* channel owning the DMA */
f0eb62b8 516 struct ata_port *ports[0];
1da177e4
LT		 517};
518
519struct ata_queued_cmd {
520 struct ata_port *ap;
521 struct ata_device *dev;
522
523 struct scsi_cmnd *scsicmd;
524 void (*scsidone)(struct scsi_cmnd *);
525
526 struct ata_taskfile tf;
527 u8 cdb[ATAPI_CDB_LEN];
528
529 unsigned long flags; /* ATA_QCFLAG_xxx */
530 unsigned int tag;
531 unsigned int n_elem;
532
533 int dma_dir;
534
5a5dbd18 535 unsigned int sect_size;
cedc9a47 536
1da177e4 537 unsigned int nbytes;
aacda375 538 unsigned int extrabytes;
1da177e4
LT		 539 unsigned int curbytes;
540
87260216 541 struct scatterlist *cursg;
1da177e4
LT		 542 unsigned int cursg_ofs;
543
544 struct scatterlist sgent;
1da177e4 545
ff2aeb1e 546 struct scatterlist *sg;
1da177e4 547
a22e2eb0 548 unsigned int err_mask;
e61e0672 549 struct ata_taskfile result_tf;
1da177e4
LT		 550 ata_qc_cb_t complete_fn;
551
1da177e4 552 void *private_data;
1c50dc83 553 void *lldd_task;
1da177e4
LT		 554};
555
cca3974e 556struct ata_port_stats {
1da177e4
LT		 557 unsigned long unhandled_irq;
558 unsigned long idle_irq;
559 unsigned long rw_reqbuf;
560};
561
0c247c55 562struct ata_ering_entry {
3884f7b0 563 unsigned int eflags;
0c247c55
TH		 564 unsigned int err_mask;
565 u64 timestamp;
566};
567
568struct ata_ering {
569 int cursor;
570 struct ata_ering_entry ring[ATA_ERING_SIZE];
571};
572
1da177e4 573struct ata_device {
9af5c9c9 574 struct ata_link *link;
72fa4b74 575 unsigned int devno; /* 0 or 1 */
75683fe7 576 unsigned int horkage; /* List of broken features */
6866e7bc 577 unsigned long flags; /* ATA_DFLAG_xxx */
3edebac4 578 struct scsi_device *sdev; /* attached SCSI device */
fafbae87
TH		 579#ifdef CONFIG_ATA_ACPI
580 acpi_handle acpi_handle;
398e0782 581 union acpi_object *gtf_cache;
fafbae87 582#endif
72fa4b74
TH		 583 /* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */
584 u64 n_sectors; /* size of device, if ATA */
1da177e4 585 unsigned int class; /* ATA_DEV_xxx */
45fabbb7 586 unsigned long unpark_deadline;
e0a71752 587
1da177e4
LT		 588 u8 pio_mode;
589 u8 dma_mode;
590 u8 xfer_mode;
591 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
592
8cbd6df1
AL		 593 unsigned int multi_count; /* sectors count for
594 READ/WRITE MULTIPLE */
b00eec1d 595 unsigned int max_sectors; /* per-device max sectors */
6e7846e9 596 unsigned int cdb_len;
8bf62ece 597
acf356b1 598 /* per-dev xfer mask */
7dc951ae
TH		 599 unsigned long pio_mask;
600 unsigned long mwdma_mask;
601 unsigned long udma_mask;
acf356b1 602
8bf62ece
AL		 603 /* for CHS addressing */
604 u16 cylinders; /* Number of cylinders */
605 u16 heads; /* Number of heads */
606 u16 sectors; /* Number of sectors per track */
0c247c55
TH		 607
608 /* error history */
7d47e8d4 609 int spdn_cnt;
f7e98930
JG		 610 struct ata_ering ering;
611
612 union {
613 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
614 u32 gscr[SATA_PMP_GSCR_DWORDS]; /* PMP GSCR block */
615 };
1da177e4
LT		 616};
617
72fa4b74
TH		 618/* Offset into struct ata_device. Fields above it are maintained
619 * acress device init. Fields below are zeroed.
620 */
621#define ATA_DEVICE_CLEAR_OFFSET offsetof(struct ata_device, n_sectors)
622
f3e81b19
TH		 623struct ata_eh_info {
624 struct ata_device *dev; /* offending device */
625 u32 serror; /* SError from LLDD */
626 unsigned int err_mask; /* port-wide err_mask */
627 unsigned int action; /* ATA_EH_* action mask */
47005f25 628 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */
f3e81b19 629 unsigned int flags; /* ATA_EHI_* flags */
abdda733 630
abdda733
TH		 631 unsigned int probe_mask;
632
f3e81b19
TH		 633 char desc[ATA_EH_DESC_LEN];
634 int desc_len;
635};
636
637struct ata_eh_context {
638 struct ata_eh_info i;
639 int tries[ATA_MAX_DEVICES];
87fbc5a0
TH		 640 int cmd_timeout_idx[ATA_MAX_DEVICES]
641 [ATA_EH_CMD_TIMEOUT_TABLE_SIZE];
abdda733
TH		 642 unsigned int classes[ATA_MAX_DEVICES];
643 unsigned int did_probe_mask;
45fabbb7 644 unsigned int unloaded_mask;
00115e0f
TH		 645 unsigned int saved_ncq_enabled;
646 u8 saved_xfer_mode[ATA_MAX_DEVICES];
0a2c0f56
TH		 647 /* timestamp for the last reset attempt or success */
648 unsigned long last_reset;
f3e81b19
TH		 649};
650
64578a3d
TH		 651struct ata_acpi_drive
652{
653 u32 pio;
654 u32 dma;
655} __packed;
656
657struct ata_acpi_gtm {
658 struct ata_acpi_drive drive[2];
659 u32 flags;
660} __packed;
661
9af5c9c9
TH		 662struct ata_link {
663 struct ata_port *ap;
8989805d 664 int pmp; /* port multiplier port # */
9af5c9c9
TH		 665
666 unsigned int active_tag; /* active tag on this link */
667 u32 sactive; /* active NCQ commands */
668
0c88758b
TH		 669 unsigned int flags; /* ATA_LFLAG_xxx */
670
d127ea7b 671 u32 saved_scontrol; /* SControl on probe */
9af5c9c9
TH		 672 unsigned int hw_sata_spd_limit;
673 unsigned int sata_spd_limit;
674 unsigned int sata_spd; /* current SATA PHY speed */
675
676 /* record runtime error info, protected by host_set lock */
677 struct ata_eh_info eh_info;
678 /* EH context */
679 struct ata_eh_context eh_context;
680
681 struct ata_device device[ATA_MAX_DEVICES];
682};
683
1da177e4 684struct ata_port {
cca3974e 685 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */
029cfd6b 686 struct ata_port_operations *ops;
ba6a1308 687 spinlock_t *lock;
1da177e4 688 unsigned long flags; /* ATA_FLAG_xxx */
b51e9e5d 689 unsigned int pflags; /* ATA_PFLAG_xxx */
44877b4e
TH		 690 unsigned int print_id; /* user visible unique port ID */
691 unsigned int port_no; /* 0 based port no. inside the host */
1da177e4
LT		 692
693 struct ata_prd *prd; /* our SG list */
694 dma_addr_t prd_dma; /* and its DMA mapping */
695
127102ae 696#ifdef CONFIG_ATA_SFF
1da177e4 697 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
127102ae 698#endif /* CONFIG_ATA_SFF */
1da177e4
LT		 699
700 u8 ctl; /* cache of ATA control register */
701 u8 last_ctl; /* Cache last written value */
1da177e4
LT		 702 unsigned int pio_mask;
703 unsigned int mwdma_mask;
704 unsigned int udma_mask;
705 unsigned int cbl; /* cable type; ATA_CBL_xxx */
1da177e4
LT		 706
707 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
8a8bc223 708 unsigned long qc_allocated;
dedaf2b0 709 unsigned int qc_active;
da917d69 710 int nr_active_links; /* #links with active qcs */
dedaf2b0 711
b1c72916
TH		 712 struct ata_link link; /* host default link */
713 struct ata_link *slave_link; /* see ata_slave_link_init() */
1da177e4 714
8989805d
TH		 715 int nr_pmp_links; /* nr of available PMP links */
716 struct ata_link *pmp_link; /* array of PMP links */
da917d69 717 struct ata_link *excl_link; /* for PMP qc exclusion */
8989805d 718
cca3974e
JG		 719 struct ata_port_stats stats;
720 struct ata_host *host;
2f1f610b 721 struct device *dev;
1da177e4 722
65f27f38 723 void *port_task_data;
52bad64d
DH		 724 struct delayed_work port_task;
725 struct delayed_work hotplug_task;
3b01b8af 726 struct work_struct scsi_rescan_task;
86e45b6b 727
14be71f4 728 unsigned int hsm_task_state;
1da177e4 729
bfd60579 730 u32 msg_enable;
a72ec4ce 731 struct list_head eh_done_q;
c6cf9e99 732 wait_queue_head_t eh_wait_q;
a1e10f7e 733 int eh_tries;
45fabbb7 734 struct completion park_req_pending;
bfd60579 735
500530f6
TH		 736 pm_message_t pm_mesg;
737 int *pm_result;
ca77329f 738 enum link_pm pm_policy;
500530f6 739
5ddf24c5
TH		 740 struct timer_list fastdrain_timer;
741 unsigned long fastdrain_cnt;
742
18f7ba4c 743 int em_message_type;
1da177e4 744 void *private_data;
fe635c7e 745
fafbae87
TH		 746#ifdef CONFIG_ATA_ACPI
747 acpi_handle acpi_handle;
c05e6ff0 748 struct ata_acpi_gtm __acpi_init_gtm; /* use ata_acpi_init_gtm() */
fafbae87 749#endif
fe635c7e 750 u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */
1da177e4
LT		 751};
752
029cfd6b
TH		 753/* The following initializer overrides a method to NULL whether one of
754 * its parent has the method defined or not. This is equivalent to
755 * ERR_PTR(-ENOENT). Unfortunately, ERR_PTR doesn't render a constant
756 * expression and thus can't be used as an initializer.
757 */
758#define ATA_OP_NULL (void *)(unsigned long)(-ENOENT)
759
1da177e4 760struct ata_port_operations {
c1bc899f
TH		 761 /*
762 * Command execution
763 */
764 int (*qc_defer)(struct ata_queued_cmd *qc);
765 int (*check_atapi_dma)(struct ata_queued_cmd *qc);
766 void (*qc_prep)(struct ata_queued_cmd *qc);
767 unsigned int (*qc_issue)(struct ata_queued_cmd *qc);
22183bf5 768 bool (*qc_fill_rtf)(struct ata_queued_cmd *qc);
1da177e4 769
c1bc899f
TH		 770 /*
771 * Configuration and exception handling
772 */
773 int (*cable_detect)(struct ata_port *ap);
774 unsigned long (*mode_filter)(struct ata_device *dev, unsigned long xfer_mask);
775 void (*set_piomode)(struct ata_port *ap, struct ata_device *dev);
776 void (*set_dmamode)(struct ata_port *ap, struct ata_device *dev);
777 int (*set_mode)(struct ata_link *link, struct ata_device **r_failed_dev);
963e4975 778 unsigned int (*read_id)(struct ata_device *dev, struct ata_taskfile *tf, u16 *id);
1da177e4 779
c1bc899f 780 void (*dev_config)(struct ata_device *dev);
1da177e4 781
c1bc899f
TH		 782 void (*freeze)(struct ata_port *ap);
783 void (*thaw)(struct ata_port *ap);
a1efdaba
TH		 784 ata_prereset_fn_t prereset;
785 ata_reset_fn_t softreset;
786 ata_reset_fn_t hardreset;
787 ata_postreset_fn_t postreset;
788 ata_prereset_fn_t pmp_prereset;
789 ata_reset_fn_t pmp_softreset;
790 ata_reset_fn_t pmp_hardreset;
791 ata_postreset_fn_t pmp_postreset;
c1bc899f
TH		 792 void (*error_handler)(struct ata_port *ap);
793 void (*post_internal_cmd)(struct ata_queued_cmd *qc);
794
795 /*
796 * Optional features
797 */
82ef04fb
TH		 798 int (*scr_read)(struct ata_link *link, unsigned int sc_reg, u32 *val);
799 int (*scr_write)(struct ata_link *link, unsigned int sc_reg, u32 val);
c1bc899f
TH		 800 void (*pmp_attach)(struct ata_port *ap);
801 void (*pmp_detach)(struct ata_port *ap);
802 int (*enable_pm)(struct ata_port *ap, enum link_pm policy);
803 void (*disable_pm)(struct ata_port *ap);
804
805 /*
806 * Start, stop, suspend and resume
807 */
808 int (*port_suspend)(struct ata_port *ap, pm_message_t mesg);
809 int (*port_resume)(struct ata_port *ap);
810 int (*port_start)(struct ata_port *ap);
811 void (*port_stop)(struct ata_port *ap);
812 void (*host_stop)(struct ata_host *host);
813
127102ae 814#ifdef CONFIG_ATA_SFF
c1bc899f
TH		 815 /*
816 * SFF / taskfile oriented ops
817 */
5682ed33
TH		 818 void (*sff_dev_select)(struct ata_port *ap, unsigned int device);
819 u8 (*sff_check_status)(struct ata_port *ap);
820 u8 (*sff_check_altstatus)(struct ata_port *ap);
821 void (*sff_tf_load)(struct ata_port *ap, const struct ata_taskfile *tf);
822 void (*sff_tf_read)(struct ata_port *ap, struct ata_taskfile *tf);
823 void (*sff_exec_command)(struct ata_port *ap,
824 const struct ata_taskfile *tf);
825 unsigned int (*sff_data_xfer)(struct ata_device *dev,
826 unsigned char *buf, unsigned int buflen, int rw);
827 u8 (*sff_irq_on)(struct ata_port *);
828 void (*sff_irq_clear)(struct ata_port *);
829
c1bc899f
TH		 830 void (*bmdma_setup)(struct ata_queued_cmd *qc);
831 void (*bmdma_start)(struct ata_queued_cmd *qc);
832 void (*bmdma_stop)(struct ata_queued_cmd *qc);
833 u8 (*bmdma_status)(struct ata_port *ap);
127102ae 834#endif /* CONFIG_ATA_SFF */
c1bc899f 835
18f7ba4c
KCA		 836 ssize_t (*em_show)(struct ata_port *ap, char *buf);
837 ssize_t (*em_store)(struct ata_port *ap, const char *message,
838 size_t size);
839 ssize_t (*sw_activity_show)(struct ata_device *dev, char *buf);
840 ssize_t (*sw_activity_store)(struct ata_device *dev,
841 enum sw_activity val);
c1bc899f
TH		 842 /*
843 * Obsolete
9ec957f2 844 */
c1bc899f
TH		 845 void (*phy_reset)(struct ata_port *ap);
846 void (*eng_timeout)(struct ata_port *ap);
029cfd6b
TH		 847
848 /*
849 * ->inherits must be the last field and all the preceding
850 * fields must be pointers.
851 */
852 const struct ata_port_operations *inherits;
1da177e4
LT		 853};
854
855struct ata_port_info {
cca3974e 856 unsigned long flags;
0c88758b 857 unsigned long link_flags;
1da177e4
LT		 858 unsigned long pio_mask;
859 unsigned long mwdma_mask;
860 unsigned long udma_mask;
029cfd6b 861 struct ata_port_operations *port_ops;
e99f8b5e 862 void *private_data;
1da177e4
LT		 863};
864
452503f9
AC		 865struct ata_timing {
866 unsigned short mode; /* ATA mode */
867 unsigned short setup; /* t1 */
868 unsigned short act8b; /* t2 for 8-bit I/O */
869 unsigned short rec8b; /* t2i for 8-bit I/O */
870 unsigned short cyc8b; /* t0 for 8-bit I/O */
871 unsigned short active; /* t2 or tD */
872 unsigned short recover; /* t2i or tK */
3ada9c12 873 unsigned short dmack_hold; /* tj */
452503f9
AC		 874 unsigned short cycle; /* t0 */
875 unsigned short udma; /* t2CYCTYP/2 */
876};
877
624d5c51
TH		 878/*
879 * Core layer - drivers/ata/libata-core.c
880 */
e9c83914
TH		 881extern const unsigned long sata_deb_timing_normal[];
882extern const unsigned long sata_deb_timing_hotplug[];
883extern const unsigned long sata_deb_timing_long[];
884
029cfd6b 885extern struct ata_port_operations ata_dummy_port_ops;
21b0ad4f 886extern const struct ata_port_info ata_dummy_port_info;
dd5b06c4 887
e9c83914
TH		 888static inline const unsigned long *
889sata_ehc_deb_timing(struct ata_eh_context *ehc)
890{
891 if (ehc->i.flags & ATA_EHI_HOTPLUGGED)
892 return sata_deb_timing_hotplug;
893 else
894 return sata_deb_timing_normal;
895}
d7bb4cc7 896
dd5b06c4
TH		 897static inline int ata_port_is_dummy(struct ata_port *ap)
898{
899 return ap->ops == &ata_dummy_port_ops;
900}
901
1da177e4 902extern void ata_port_probe(struct ata_port *);
936fd732 903extern int sata_set_spd(struct ata_link *link);
0aa1113d 904extern int ata_std_prereset(struct ata_link *link, unsigned long deadline);
aa2731ad
TH		 905extern int ata_wait_after_reset(struct ata_link *link, unsigned long deadline,
906 int (*check_ready)(struct ata_link *link));
936fd732
TH		 907extern int sata_link_debounce(struct ata_link *link,
908 const unsigned long *params, unsigned long deadline);
909extern int sata_link_resume(struct ata_link *link, const unsigned long *params,
910 unsigned long deadline);
cc0680a5 911extern int sata_link_hardreset(struct ata_link *link,
9dadd45b
TH		 912 const unsigned long *timing, unsigned long deadline,
913 bool *online, int (*check_ready)(struct ata_link *));
57c9efdf
TH		 914extern int sata_std_hardreset(struct ata_link *link, unsigned int *class,
915 unsigned long deadline);
203c75b8 916extern void ata_std_postreset(struct ata_link *link, unsigned int *classes);
1da177e4 917extern void ata_port_disable(struct ata_port *);
2855568b 918
f3187195 919extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports);
f5cda257
TH		 920extern struct ata_host *ata_host_alloc_pinfo(struct device *dev,
921 const struct ata_port_info * const * ppi, int n_ports);
b1c72916 922extern int ata_slave_link_init(struct ata_port *ap);
ecef7253 923extern int ata_host_start(struct ata_host *host);
f3187195
TH		 924extern int ata_host_register(struct ata_host *host,
925 struct scsi_host_template *sht);
f5cda257
TH		 926extern int ata_host_activate(struct ata_host *host, int irq,
927 irq_handler_t irq_handler, unsigned long irq_flags,
928 struct scsi_host_template *sht);
0529c159 929extern void ata_host_detach(struct ata_host *host);
cca3974e 930extern void ata_host_init(struct ata_host *, struct device *,
029cfd6b 931 unsigned long, struct ata_port_operations *);
193515d5 932extern int ata_scsi_detect(struct scsi_host_template *sht);
1da177e4
LT		 933extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
934extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *));
94be9a58
JG		 935extern int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *dev,
936 int cmd, void __user *arg);
80289167 937extern void ata_sas_port_destroy(struct ata_port *);
cca3974e 938extern struct ata_port *ata_sas_port_alloc(struct ata_host *,
80289167
BK		 939 struct ata_port_info *, struct Scsi_Host *);
940extern int ata_sas_port_init(struct ata_port *);
941extern int ata_sas_port_start(struct ata_port *ap);
942extern void ata_sas_port_stop(struct ata_port *ap);
943extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *);
944extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
945 struct ata_port *ap);
936fd732
TH		 946extern int sata_scr_valid(struct ata_link *link);
947extern int sata_scr_read(struct ata_link *link, int reg, u32 *val);
948extern int sata_scr_write(struct ata_link *link, int reg, u32 val);
949extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val);
b5b3fa38
TH		 950extern bool ata_link_online(struct ata_link *link);
951extern bool ata_link_offline(struct ata_link *link);
6ffa01d8 952#ifdef CONFIG_PM
cca3974e
JG		 953extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg);
954extern void ata_host_resume(struct ata_host *host);
6ffa01d8 955#endif
67846b30 956extern int ata_ratelimit(void);
c22daff4 957extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
341c2c95 958 unsigned long interval, unsigned long timeout);
436d34b3 959extern int atapi_cmd_type(u8 opcode);
9977126c
TH		 960extern void ata_tf_to_fis(const struct ata_taskfile *tf,
961 u8 pmp, int is_cmd, u8 *fis);
057ace5e 962extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
7dc951ae
TH		 963extern unsigned long ata_pack_xfermask(unsigned long pio_mask,
964 unsigned long mwdma_mask, unsigned long udma_mask);
965extern void ata_unpack_xfermask(unsigned long xfer_mask,
966 unsigned long *pio_mask, unsigned long *mwdma_mask,
967 unsigned long *udma_mask);
968extern u8 ata_xfer_mask2mode(unsigned long xfer_mask);
969extern unsigned long ata_xfer_mode2mask(u8 xfer_mode);
970extern int ata_xfer_mode2shift(unsigned long xfer_mode);
971extern const char *ata_mode_string(unsigned long xfer_mask);
972extern unsigned long ata_id_xfermask(const u16 *id);
2dcb407e 973extern int ata_port_start(struct ata_port *ap);
31cc23b3 974extern int ata_std_qc_defer(struct ata_queued_cmd *qc);
e46834cd 975extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
1da177e4
LT		 976extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
977 unsigned int n_elem);
057ace5e 978extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
10305f0f 979extern void ata_dev_disable(struct ata_device *adev);
6a62a04d
TH		 980extern void ata_id_string(const u16 *id, unsigned char *s,
981 unsigned int ofs, unsigned int len);
982extern void ata_id_c_string(const u16 *id, unsigned char *s,
983 unsigned int ofs, unsigned int len);
963e4975
AC		 984extern unsigned int ata_do_dev_read_id(struct ata_device *dev,
985 struct ata_taskfile *tf, u16 *id);
f686bcb8 986extern void ata_qc_complete(struct ata_queued_cmd *qc);
79f97dad 987extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active);
3373efd8 988extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
1da177e4
LT		 989 void (*done)(struct scsi_cmnd *));
990extern int ata_std_bios_param(struct scsi_device *sdev,
991 struct block_device *bdev,
992 sector_t capacity, int geom[]);
993extern int ata_scsi_slave_config(struct scsi_device *sdev);
83c47bcb 994extern void ata_scsi_slave_destroy(struct scsi_device *sdev);
a6e6ce8e
TH		 995extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
996 int queue_depth);
3373efd8 997extern struct ata_device *ata_dev_pair(struct ata_device *adev);
0260731f 998extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev);
1da177e4 999
be0d18df
AC		 1000extern int ata_cable_40wire(struct ata_port *ap);
1001extern int ata_cable_80wire(struct ata_port *ap);
1002extern int ata_cable_sata(struct ata_port *ap);
c88f90c3 1003extern int ata_cable_ignore(struct ata_port *ap);
be0d18df
AC		 1004extern int ata_cable_unknown(struct ata_port *ap);
1005
624d5c51 1006/* Timing helpers */
1bc4ccff 1007extern unsigned int ata_pio_need_iordy(const struct ata_device *);
6357357c 1008extern const struct ata_timing *ata_timing_find_mode(u8 xfer_mode);
452503f9
AC		 1009extern int ata_timing_compute(struct ata_device *, unsigned short,
1010 struct ata_timing *, int, int);
1011extern void ata_timing_merge(const struct ata_timing *,
1012 const struct ata_timing *, struct ata_timing *,
1013 unsigned int);
a0f79b92 1014extern u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle);
452503f9 1015
624d5c51
TH		 1016/* PCI */
1017#ifdef CONFIG_PCI
1018struct pci_dev;
1019
1020struct pci_bits {
1021 unsigned int reg; /* PCI config register to read */
1022 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
1023 unsigned long mask;
1024 unsigned long val;
452503f9
AC		 1025};
1026
624d5c51
TH		 1027extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
1028extern void ata_pci_remove_one(struct pci_dev *pdev);
1029
1030#ifdef CONFIG_PM
1031extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg);
1032extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev);
1033extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
1034extern int ata_pci_device_resume(struct pci_dev *pdev);
1035#endif /* CONFIG_PM */
1036#endif /* CONFIG_PCI */
1037
1038/*
1039 * ACPI - drivers/ata/libata-acpi.c
1040 */
e1ddb4b6 1041#ifdef CONFIG_ATA_ACPI
c05e6ff0
TH		 1042static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
1043{
1044 if (ap->pflags & ATA_PFLAG_INIT_GTM_VALID)
1045 return &ap->__acpi_init_gtm;
1046 return NULL;
1047}
0d02f0b2
TH		 1048int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm);
1049int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *stm);
7c77fa4d
TH		 1050unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev,
1051 const struct ata_acpi_gtm *gtm);
021ee9a6 1052int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm);
e1ddb4b6 1053#else
c05e6ff0
TH		 1054static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
1055{
1056 return NULL;
1057}
7c77fa4d
TH		 1058
1059static inline int ata_acpi_stm(const struct ata_port *ap,
1060 struct ata_acpi_gtm *stm)
1061{
1062 return -ENOSYS;
1063}
1064
1065static inline int ata_acpi_gtm(const struct ata_port *ap,
1066 struct ata_acpi_gtm *stm)
1067{
1068 return -ENOSYS;
1069}
1070
1071static inline unsigned int ata_acpi_gtm_xfermask(struct ata_device *dev,
1072 const struct ata_acpi_gtm *gtm)
1073{
1074 return 0;
1075}
021ee9a6
TH		 1076
1077static inline int ata_acpi_cbl_80wire(struct ata_port *ap,
1078 const struct ata_acpi_gtm *gtm)
1079{
1080 return 0;
1081}
e1ddb4b6 1082#endif
1da177e4 1083
ece1d636 1084/*
624d5c51 1085 * EH - drivers/ata/libata-eh.c
ece1d636 1086 */
7b70fc03 1087extern void ata_port_schedule_eh(struct ata_port *ap);
dbd82616 1088extern int ata_link_abort(struct ata_link *link);
7b70fc03 1089extern int ata_port_abort(struct ata_port *ap);
e3180499 1090extern int ata_port_freeze(struct ata_port *ap);
7d77b247 1091extern int sata_async_notification(struct ata_port *ap);
e3180499
TH		 1092
1093extern void ata_eh_freeze_port(struct ata_port *ap);
1094extern void ata_eh_thaw_port(struct ata_port *ap);
7b70fc03 1095
ece1d636
TH		 1096extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
1097extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
10acf3b0 1098extern void ata_eh_analyze_ncq_error(struct ata_link *link);
ece1d636 1099
f5914a46
TH		 1100extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
1101 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
1102 ata_postreset_fn_t postreset);
a1efdaba 1103extern void ata_std_error_handler(struct ata_port *ap);
022bdb07 1104
68d1d07b
TH		 1105/*
1106 * Base operations to inherit from and initializers for sht
1107 *
1108 * Operations
1109 *
1110 * base : Common to all libata drivers.
1111 * sata : SATA controllers w/ native interface.
1112 * pmp : SATA controllers w/ PMP support.
1113 * sff : SFF ATA controllers w/o BMDMA support.
1114 * bmdma : SFF ATA controllers w/ BMDMA support.
1115 *
1116 * sht initializers
1117 *
1118 * BASE : Common to all libata drivers. The user must set
1119 * sg_tablesize and dma_boundary.
1120 * PIO : SFF ATA controllers w/ only PIO support.
1121 * BMDMA : SFF ATA controllers w/ BMDMA support. sg_tablesize and
1122 * dma_boundary are set to BMDMA limits.
1123 * NCQ : SATA controllers supporting NCQ. The user must set
1124 * sg_tablesize, dma_boundary and can_queue.
1125 */
1126extern const struct ata_port_operations ata_base_port_ops;
1127extern const struct ata_port_operations sata_port_ops;
45fabbb7 1128extern struct device_attribute *ata_common_sdev_attrs[];
68d1d07b
TH		 1129
1130#define ATA_BASE_SHT(drv_name) \
1131 .module = THIS_MODULE, \
1132 .name = drv_name, \
1133 .ioctl = ata_scsi_ioctl, \
1134 .queuecommand = ata_scsi_queuecmd, \
1135 .can_queue = ATA_DEF_QUEUE, \
1136 .this_id = ATA_SHT_THIS_ID, \
1137 .cmd_per_lun = ATA_SHT_CMD_PER_LUN, \
1138 .emulated = ATA_SHT_EMULATED, \
1139 .use_clustering = ATA_SHT_USE_CLUSTERING, \
1140 .proc_name = drv_name, \
1141 .slave_configure = ata_scsi_slave_config, \
1142 .slave_destroy = ata_scsi_slave_destroy, \
45fabbb7
EO		 1143 .bios_param = ata_std_bios_param, \
1144 .sdev_attrs = ata_common_sdev_attrs
68d1d07b 1145
68d1d07b
TH		 1146#define ATA_NCQ_SHT(drv_name) \
1147 ATA_BASE_SHT(drv_name), \
1148 .change_queue_depth = ata_scsi_change_queue_depth
1149
071f44b1
TH		 1150/*
1151 * PMP helpers
1152 */
88fcd562 1153#ifdef CONFIG_SATA_PMP
071f44b1
TH		 1154static inline bool sata_pmp_supported(struct ata_port *ap)
1155{
1156 return ap->flags & ATA_FLAG_PMP;
1157}
1158
1159static inline bool sata_pmp_attached(struct ata_port *ap)
1160{
1161 return ap->nr_pmp_links != 0;
1162}
1163
1164static inline int ata_is_host_link(const struct ata_link *link)
1165{
b1c72916 1166 return link == &link->ap->link || link == link->ap->slave_link;
071f44b1 1167}
88fcd562
TH		 1168#else /* CONFIG_SATA_PMP */
1169static inline bool sata_pmp_supported(struct ata_port *ap)
1170{
1171 return false;
1172}
1173
1174static inline bool sata_pmp_attached(struct ata_port *ap)
1175{
1176 return false;
1177}
1178
1179static inline int ata_is_host_link(const struct ata_link *link)
1180{
1181 return 1;
1182}
1183#endif /* CONFIG_SATA_PMP */
071f44b1
TH		 1184
1185static inline int sata_srst_pmp(struct ata_link *link)
1186{
1187 if (sata_pmp_supported(link->ap) && ata_is_host_link(link))
1188 return SATA_PMP_CTRL_PORT;
1189 return link->pmp;
1190}
1191
61440db6
TH		 1192/*
1193 * printk helpers
1194 */
1195#define ata_port_printk(ap, lv, fmt, args...) \
c2e366a1 1196 printk("%sata%u: "fmt, lv, (ap)->print_id , ##args)
61440db6 1197
8989805d 1198#define ata_link_printk(link, lv, fmt, args...) do { \
b1c72916 1199 if (sata_pmp_attached((link)->ap) || (link)->ap->slave_link) \
c2e366a1 1200 printk("%sata%u.%02u: "fmt, lv, (link)->ap->print_id, \
8989805d
TH		 1201 (link)->pmp , ##args); \
1202 else \
c2e366a1 1203 printk("%sata%u: "fmt, lv, (link)->ap->print_id , ##args); \
8989805d 1204 } while(0)
9af5c9c9 1205
61440db6 1206#define ata_dev_printk(dev, lv, fmt, args...) \
c2e366a1 1207 printk("%sata%u.%02u: "fmt, lv, (dev)->link->ap->print_id, \
8989805d 1208 (dev)->link->pmp + (dev)->devno , ##args)
1da177e4 1209
f3e81b19
TH		 1210/*
1211 * ata_eh_info helpers
1212 */
cb94c1cf
TH		 1213extern void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...)
1214 __attribute__ ((format (printf, 2, 3)));
1215extern void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...)
1216 __attribute__ ((format (printf, 2, 3)));
b64bbc39 1217extern void ata_ehi_clear_desc(struct ata_eh_info *ehi);
f3e81b19 1218
c0b6c037
TH		 1219static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
1220{
b558eddd 1221 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
f8f1e1cc 1222 ehi->flags |= ATA_EHI_HOTPLUGGED;
b558eddd 1223 ehi->action |= ATA_EH_RESET | ATA_EH_ENABLE_LINK;
c0b6c037
TH		 1224 ehi->err_mask |= AC_ERR_ATA_BUS;
1225}
1226
cbcdd875
TH		 1227/*
1228 * port description helpers
1229 */
1230extern void ata_port_desc(struct ata_port *ap, const char *fmt, ...)
1231 __attribute__ ((format (printf, 2, 3)));
1232#ifdef CONFIG_PCI
1233extern void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset,
1234 const char *name);
1235#endif
1236
1da177e4
LT		 1237static inline unsigned int ata_tag_valid(unsigned int tag)
1238{
1239 return (tag < ATA_MAX_QUEUE) ? 1 : 0;
1240}
1241
2ab7db1f
TH		 1242static inline unsigned int ata_tag_internal(unsigned int tag)
1243{
83c063dd 1244 return tag == ATA_TAG_INTERNAL;
2ab7db1f
TH		 1245}
1246
5806db22
TH		 1247/*
1248 * device helpers
1249 */
e1211e3f 1250static inline unsigned int ata_class_enabled(unsigned int class)
597afd21 1251{
e0a71752
TH		 1252 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI ||
1253 class == ATA_DEV_PMP || class == ATA_DEV_SEMB;
597afd21
TH		 1254}
1255
e1211e3f 1256static inline unsigned int ata_class_disabled(unsigned int class)
1da177e4 1257{
e0a71752
TH		 1258 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP ||
1259 class == ATA_DEV_PMP_UNSUP || class == ATA_DEV_SEMB_UNSUP;
e1211e3f
TH		 1260}
1261
002c8054
TH		 1262static inline unsigned int ata_class_absent(unsigned int class)
1263{
1264 return !ata_class_enabled(class) && !ata_class_disabled(class);
1265}
1266
e1211e3f
TH		 1267static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
1268{
1269 return ata_class_enabled(dev->class);
1270}
1271
1272static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
1273{
1274 return ata_class_disabled(dev->class);
1da177e4
LT		 1275}
1276
002c8054
TH		 1277static inline unsigned int ata_dev_absent(const struct ata_device *dev)
1278{
1279 return ata_class_absent(dev->class);
1280}
1281
5806db22 1282/*
f58229f8 1283 * link helpers
5806db22 1284 */
f58229f8 1285static inline int ata_link_max_devices(const struct ata_link *link)
5806db22 1286{
8989805d 1287 if (ata_is_host_link(link) && link->ap->flags & ATA_FLAG_SLAVE_POSS)
5806db22
TH		 1288 return 2;
1289 return 1;
1290}
1291
da917d69
TH		 1292static inline int ata_link_active(struct ata_link *link)
1293{
1294 return ata_tag_valid(link->active_tag) || link->sactive;
1295}
1296
1eca4365
TH		 1297/*
1298 * Iterators
1299 *
1300 * ATA_LITER_* constants are used to select link iteration mode and
1301 * ATA_DITER_* device iteration mode.
1302 *
1303 * For a custom iteration directly using ata_{link|dev}_next(), if
1304 * @link or @dev, respectively, is NULL, the first element is
1305 * returned. @dev and @link can be any valid device or link and the
1306 * next element according to the iteration mode will be returned.
1307 * After the last element, NULL is returned.
1308 */
1309enum ata_link_iter_mode {
1310 ATA_LITER_EDGE, /* if present, PMP links only; otherwise,
1311 * host link. no slave link */
1312 ATA_LITER_HOST_FIRST, /* host link followed by PMP or slave links */
1313 ATA_LITER_PMP_FIRST, /* PMP links followed by host link,
1314 * slave link still comes after host link */
1315};
1316
1317enum ata_dev_iter_mode {
1318 ATA_DITER_ENABLED,
1319 ATA_DITER_ENABLED_REVERSE,
1320 ATA_DITER_ALL,
1321 ATA_DITER_ALL_REVERSE,
1322};
1323
1324extern struct ata_link *ata_link_next(struct ata_link *link,
1325 struct ata_port *ap,
1326 enum ata_link_iter_mode mode);
1327
1328extern struct ata_device *ata_dev_next(struct ata_device *dev,
1329 struct ata_link *link,
1330 enum ata_dev_iter_mode mode);
1331
1332/*
1333 * Shortcut notation for iterations
1334 *
1335 * ata_for_each_link() iterates over each link of @ap according to
1336 * @mode. @link points to the current link in the loop. @link is
1337 * NULL after loop termination. ata_for_each_dev() works the same way
1338 * except that it iterates over each device of @link.
1339 *
1340 * Note that the mode prefixes ATA_{L|D}ITER_ shouldn't need to be
1341 * specified when using the following shorthand notations. Only the
1342 * mode itself (EDGE, HOST_FIRST, ENABLED, etc...) should be
1343 * specified. This not only increases brevity but also makes it
1344 * impossible to use ATA_LITER_* for device iteration or vice-versa.
1345 */
1346#define ata_for_each_link(link, ap, mode) \
1347 for ((link) = ata_link_next(NULL, (ap), ATA_LITER_##mode); (link); \
1348 (link) = ata_link_next((link), (ap), ATA_LITER_##mode))
1349
1350#define ata_for_each_dev(dev, link, mode) \
1351 for ((dev) = ata_dev_next(NULL, (link), ATA_DITER_##mode); (dev); \
1352 (dev) = ata_dev_next((dev), (link), ATA_DITER_##mode))
5806db22 1353
6d1245bf
TH		 1354/**
1355 * ata_ncq_enabled - Test whether NCQ is enabled
1356 * @dev: ATA device to test for
1357 *
1358 * LOCKING:
1359 * spin_lock_irqsave(host lock)
1360 *
1361 * RETURNS:
1362 * 1 if NCQ is enabled for @dev, 0 otherwise.
1363 */
1364static inline int ata_ncq_enabled(struct ata_device *dev)
1365{
1366 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF |
1367 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ;
1368}
0baab86b 1369
1da177e4
LT		 1370static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
1371{
1372 qc->tf.ctl |= ATA_NIEN;
1373}
1374
f69499f4
TH		 1375static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap,
1376 unsigned int tag)
1da177e4
LT		 1377{
1378 if (likely(ata_tag_valid(tag)))
1379 return &ap->qcmd[tag];
1380 return NULL;
1381}
1382
f69499f4
TH		 1383static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap,
1384 unsigned int tag)
1385{
1386 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
1387
1388 if (unlikely(!qc) || !ap->ops->error_handler)
1389 return qc;
1390
1391 if ((qc->flags & (ATA_QCFLAG_ACTIVE |
1392 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE)
1393 return qc;
1394
1395 return NULL;
1396}
1397
aacda375
TH		 1398static inline unsigned int ata_qc_raw_nbytes(struct ata_queued_cmd *qc)
1399{
1400 return qc->nbytes - min(qc->extrabytes, qc->nbytes);
1401}
1402
3373efd8 1403static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
1da177e4
LT		 1404{
1405 memset(tf, 0, sizeof(*tf));
1406
9af5c9c9 1407 tf->ctl = dev->link->ap->ctl;
3373efd8 1408 if (dev->devno == 0)
1da177e4
LT		 1409 tf->device = ATA_DEVICE_OBS;
1410 else
1411 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
1412}
1413
2c13b7ce
JG		 1414static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
1415{
501e0c50 1416 qc->dma_dir = DMA_NONE;
ff2aeb1e 1417 qc->sg = NULL;
2c13b7ce 1418 qc->flags = 0;
87260216
JA		 1419 qc->cursg = NULL;
1420 qc->cursg_ofs = 0;
aacda375 1421 qc->nbytes = qc->extrabytes = qc->curbytes = 0;
7a801184 1422 qc->n_elem = 0;
a22e2eb0 1423 qc->err_mask = 0;
5a5dbd18 1424 qc->sect_size = ATA_SECT_SIZE;
2c13b7ce 1425
3373efd8 1426 ata_tf_init(qc->dev, &qc->tf);
e61e0672
TH		 1427
1428 /* init result_tf such that it indicates normal completion */
1429 qc->result_tf.command = ATA_DRDY;
1430 qc->result_tf.feature = 0;
2c13b7ce
JG		 1431}
1432
057ace5e 1433static inline int ata_try_flush_cache(const struct ata_device *dev)
1da177e4
LT		 1434{
1435 return ata_id_wcache_enabled(dev->id) ||
1436 ata_id_has_flush(dev->id) ||
1437 ata_id_has_flush_ext(dev->id);
1438}
1439
a7dac447
JG		 1440static inline unsigned int ac_err_mask(u8 status)
1441{
3655d1d3 1442 if (status & (ATA_BUSY | ATA_DRQ))
11a56d24 1443 return AC_ERR_HSM;
a7dac447
JG		 1444 if (status & (ATA_ERR | ATA_DF))
1445 return AC_ERR_DEV;
1446 return 0;
1447}
1448
1449static inline unsigned int __ac_err_mask(u8 status)
1450{
1451 unsigned int mask = ac_err_mask(status);
1452 if (mask == 0)
1453 return AC_ERR_OTHER;
1454 return mask;
1455}
1456
35bb94b1
JG		 1457static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
1458{
4911487a 1459 return *(struct ata_port **)&host->hostdata[0];
35bb94b1
JG		 1460}
1461
78ab88f0
TH		 1462static inline int ata_check_ready(u8 status)
1463{
005b1f74
JG		 1464 if (!(status & ATA_BUSY))
1465 return 1;
78ab88f0
TH		 1466
1467 /* 0xff indicates either no device or device not ready */
1468 if (status == 0xff)
1469 return -ENODEV;
1470
005b1f74 1471 return 0;
78ab88f0
TH		 1472}
1473
341c2c95
TH		 1474static inline unsigned long ata_deadline(unsigned long from_jiffies,
1475 unsigned long timeout_msecs)
1476{
1477 return from_jiffies + msecs_to_jiffies(timeout_msecs);
1478}
1479
b15b3eba
AC		 1480/* Don't open code these in drivers as there are traps. Firstly the range may
1481 change in future hardware and specs, secondly 0xFF means 'no DMA' but is
1482 > UDMA_0. Dyma ddreigiau */
1483
1484static inline int ata_using_mwdma(struct ata_device *adev)
1485{
1486 if (adev->dma_mode >= XFER_MW_DMA_0 && adev->dma_mode <= XFER_MW_DMA_4)
1487 return 1;
1488 return 0;
1489}
1490
1491static inline int ata_using_udma(struct ata_device *adev)
1492{
1493 if (adev->dma_mode >= XFER_UDMA_0 && adev->dma_mode <= XFER_UDMA_7)
1494 return 1;
1495 return 0;
1496}
1497
1498static inline int ata_dma_enabled(struct ata_device *adev)
1499{
1500 return (adev->dma_mode == 0xFF ? 0 : 1);
1501}
48515f6c
TH		 1502
1503/**************************************************************************
1504 * PMP - drivers/ata/libata-pmp.c
1505 */
88fcd562
TH		 1506#ifdef CONFIG_SATA_PMP
1507
48515f6c
TH		 1508extern const struct ata_port_operations sata_pmp_port_ops;
1509
1510extern int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc);
1511extern void sata_pmp_error_handler(struct ata_port *ap);
1512
88fcd562
TH		 1513#else /* CONFIG_SATA_PMP */
1514
1515#define sata_pmp_port_ops sata_port_ops
1516#define sata_pmp_qc_defer_cmd_switch ata_std_qc_defer
1517#define sata_pmp_error_handler ata_std_error_handler
1518
1519#endif /* CONFIG_SATA_PMP */
1520
48515f6c 1521
624d5c51
TH		 1522/**************************************************************************
1523 * SFF - drivers/ata/libata-sff.c
1524 */
127102ae
TH		 1525#ifdef CONFIG_ATA_SFF
1526
624d5c51
TH		 1527extern const struct ata_port_operations ata_sff_port_ops;
1528extern const struct ata_port_operations ata_bmdma_port_ops;
871af121 1529extern const struct ata_port_operations ata_bmdma32_port_ops;
624d5c51
TH		 1530
1531/* PIO only, sg_tablesize and dma_boundary limits can be removed */
1532#define ATA_PIO_SHT(drv_name) \
1533 ATA_BASE_SHT(drv_name), \
1534 .sg_tablesize = LIBATA_MAX_PRD, \
1535 .dma_boundary = ATA_DMA_BOUNDARY
1536
1537#define ATA_BMDMA_SHT(drv_name) \
1538 ATA_BASE_SHT(drv_name), \
1539 .sg_tablesize = LIBATA_MAX_PRD, \
1540 .dma_boundary = ATA_DMA_BOUNDARY
1541
9363c382
TH		 1542extern void ata_sff_qc_prep(struct ata_queued_cmd *qc);
1543extern void ata_sff_dumb_qc_prep(struct ata_queued_cmd *qc);
1544extern void ata_sff_dev_select(struct ata_port *ap, unsigned int device);
1545extern u8 ata_sff_check_status(struct ata_port *ap);
a57c1bad
AC		 1546extern void ata_sff_pause(struct ata_port *ap);
1547extern void ata_sff_dma_pause(struct ata_port *ap);
9363c382
TH		 1548extern int ata_sff_busy_sleep(struct ata_port *ap,
1549 unsigned long timeout_pat, unsigned long timeout);
705e76be 1550extern int ata_sff_wait_ready(struct ata_link *link, unsigned long deadline);
9363c382
TH		 1551extern void ata_sff_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
1552extern void ata_sff_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
1553extern void ata_sff_exec_command(struct ata_port *ap,
1554 const struct ata_taskfile *tf);
1555extern unsigned int ata_sff_data_xfer(struct ata_device *dev,
624d5c51 1556 unsigned char *buf, unsigned int buflen, int rw);
871af121
AC		 1557extern unsigned int ata_sff_data_xfer32(struct ata_device *dev,
1558 unsigned char *buf, unsigned int buflen, int rw);
9363c382 1559extern unsigned int ata_sff_data_xfer_noirq(struct ata_device *dev,
624d5c51 1560 unsigned char *buf, unsigned int buflen, int rw);
9363c382
TH		 1561extern u8 ata_sff_irq_on(struct ata_port *ap);
1562extern void ata_sff_irq_clear(struct ata_port *ap);
1563extern int ata_sff_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
1564 u8 status, int in_wq);
1565extern unsigned int ata_sff_qc_issue(struct ata_queued_cmd *qc);
22183bf5 1566extern bool ata_sff_qc_fill_rtf(struct ata_queued_cmd *qc);
9363c382
TH		 1567extern unsigned int ata_sff_host_intr(struct ata_port *ap,
1568 struct ata_queued_cmd *qc);
1569extern irqreturn_t ata_sff_interrupt(int irq, void *dev_instance);
1570extern void ata_sff_freeze(struct ata_port *ap);
1571extern void ata_sff_thaw(struct ata_port *ap);
1572extern int ata_sff_prereset(struct ata_link *link, unsigned long deadline);
1573extern unsigned int ata_sff_dev_classify(struct ata_device *dev, int present,
1574 u8 *r_err);
705e76be
TH		 1575extern int ata_sff_wait_after_reset(struct ata_link *link, unsigned int devmask,
1576 unsigned long deadline);
9363c382 1577extern int ata_sff_softreset(struct ata_link *link, unsigned int *classes,
624d5c51 1578 unsigned long deadline);
9363c382
TH		 1579extern int sata_sff_hardreset(struct ata_link *link, unsigned int *class,
1580 unsigned long deadline);
1581extern void ata_sff_postreset(struct ata_link *link, unsigned int *classes);
1582extern void ata_sff_error_handler(struct ata_port *ap);
1583extern void ata_sff_post_internal_cmd(struct ata_queued_cmd *qc);
624d5c51 1584extern int ata_sff_port_start(struct ata_port *ap);
9363c382
TH		 1585extern void ata_sff_std_ports(struct ata_ioports *ioaddr);
1586extern unsigned long ata_bmdma_mode_filter(struct ata_device *dev,
1587 unsigned long xfer_mask);
624d5c51
TH		 1588extern void ata_bmdma_setup(struct ata_queued_cmd *qc);
1589extern void ata_bmdma_start(struct ata_queued_cmd *qc);
1590extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
1591extern u8 ata_bmdma_status(struct ata_port *ap);
1592extern void ata_bus_reset(struct ata_port *ap);
1593
1594#ifdef CONFIG_PCI
9363c382
TH		 1595extern int ata_pci_bmdma_clear_simplex(struct pci_dev *pdev);
1596extern int ata_pci_bmdma_init(struct ata_host *host);
1597extern int ata_pci_sff_init_host(struct ata_host *host);
1598extern int ata_pci_sff_prepare_host(struct pci_dev *pdev,
624d5c51
TH		 1599 const struct ata_port_info * const * ppi,
1600 struct ata_host **r_host);
9363c382 1601extern int ata_pci_sff_activate_host(struct ata_host *host,
624d5c51
TH		 1602 irq_handler_t irq_handler,
1603 struct scsi_host_template *sht);
9363c382
TH		 1604extern int ata_pci_sff_init_one(struct pci_dev *pdev,
1605 const struct ata_port_info * const * ppi,
1606 struct scsi_host_template *sht, void *host_priv);
624d5c51
TH		 1607#endif /* CONFIG_PCI */
1608
624d5c51 1609/**
9363c382 1610 * ata_sff_busy_wait - Wait for a port status register
624d5c51
TH		 1611 * @ap: Port to wait for.
1612 * @bits: bits that must be clear
1613 * @max: number of 10uS waits to perform
1614 *
1615 * Waits up to max*10 microseconds for the selected bits in the port's
1616 * status register to be cleared.
1617 * Returns final value of status register.
1618 *
1619 * LOCKING:
1620 * Inherited from caller.
1621 */
9363c382
TH		 1622static inline u8 ata_sff_busy_wait(struct ata_port *ap, unsigned int bits,
1623 unsigned int max)
624d5c51
TH		 1624{
1625 u8 status;
1626
1627 do {
1628 udelay(10);
5682ed33 1629 status = ap->ops->sff_check_status(ap);
624d5c51
TH		 1630 max--;
1631 } while (status != 0xff && (status & bits) && (max > 0));
1632
1633 return status;
1634}
1635
1636/**
1637 * ata_wait_idle - Wait for a port to be idle.
1638 * @ap: Port to wait for.
1639 *
1640 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
1641 * Returns final value of status register.
1642 *
1643 * LOCKING:
1644 * Inherited from caller.
1645 */
1646static inline u8 ata_wait_idle(struct ata_port *ap)
1647{
9363c382 1648 u8 status = ata_sff_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
624d5c51
TH		 1649
1650#ifdef ATA_DEBUG
1651 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ)))
1652 ata_port_printk(ap, KERN_DEBUG, "abnormal Status 0x%X\n",
1653 status);
1654#endif
1655
1656 return status;
1657}
127102ae 1658#endif /* CONFIG_ATA_SFF */
624d5c51 1659
1da177e4 1660#endif /* __LINUX_LIBATA_H__ */
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