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Merge branch 'tda998x-devel' of git://ftp.arm.linux.org.uk/~rmk/linux-cubox into...
[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>
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>
c0c362b6 40#include <linux/sched.h>
1da177e4 41
a6d967a4
JG		 42/*
43 * Define if arch has non-standard setup. This is a _PCI_ standard
44 * not a legacy or ISA standard.
45 */
46#ifdef CONFIG_ATA_NONSTANDARD
2ec7df04 47#include <asm/libata-portmap.h>
a6d967a4
JG		 48#else
49#include <asm-generic/libata-portmap.h>
50#endif
2ec7df04 51
1da177e4 52/*
bfd60579
RD		 53 * compile-time options: to be removed as soon as all the drivers are
54 * converted to the new debugging mechanism
1da177e4
LT		 55 */
56#undef ATA_DEBUG /* debugging output */
57#undef ATA_VERBOSE_DEBUG /* yet more debugging output */
58#undef ATA_IRQ_TRAP /* define to ack screaming irqs */
59#undef ATA_NDEBUG /* define to disable quick runtime checks */
1da177e4
LT		 60
61
62/* note: prints function name for you */
63#ifdef ATA_DEBUG
1f938d06 64#define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args)
1da177e4 65#ifdef ATA_VERBOSE_DEBUG
1f938d06 66#define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args)
1da177e4
LT		 67#else
68#define VPRINTK(fmt, args...)
69#endif /* ATA_VERBOSE_DEBUG */
70#else
71#define DPRINTK(fmt, args...)
72#define VPRINTK(fmt, args...)
73#endif /* ATA_DEBUG */
74
1f938d06 75#define BPRINTK(fmt, args...) if (ap->flags & ATA_FLAG_DEBUGMSG) printk(KERN_ERR "%s: " fmt, __func__, ## args)
2c13b7ce 76
06296a1e
JP		 77#define ata_print_version_once(dev, version) \
78({ \
79 static bool __print_once; \
80 \
81 if (!__print_once) { \
82 __print_once = true; \
83 ata_print_version(dev, version); \
84 } \
85})
86
bfd60579
RD		 87/* NEW: debug levels */
88#define HAVE_LIBATA_MSG 1
89
90enum {
91 ATA_MSG_DRV = 0x0001,
92 ATA_MSG_INFO = 0x0002,
93 ATA_MSG_PROBE = 0x0004,
94 ATA_MSG_WARN = 0x0008,
95 ATA_MSG_MALLOC = 0x0010,
96 ATA_MSG_CTL = 0x0020,
97 ATA_MSG_INTR = 0x0040,
98 ATA_MSG_ERR = 0x0080,
99};
100
101#define ata_msg_drv(p) ((p)->msg_enable & ATA_MSG_DRV)
102#define ata_msg_info(p) ((p)->msg_enable & ATA_MSG_INFO)
103#define ata_msg_probe(p) ((p)->msg_enable & ATA_MSG_PROBE)
104#define ata_msg_warn(p) ((p)->msg_enable & ATA_MSG_WARN)
105#define ata_msg_malloc(p) ((p)->msg_enable & ATA_MSG_MALLOC)
106#define ata_msg_ctl(p) ((p)->msg_enable & ATA_MSG_CTL)
107#define ata_msg_intr(p) ((p)->msg_enable & ATA_MSG_INTR)
108#define ata_msg_err(p) ((p)->msg_enable & ATA_MSG_ERR)
109
110static inline u32 ata_msg_init(int dval, int default_msg_enable_bits)
111{
112 if (dval < 0 || dval >= (sizeof(u32) * 8))
113 return default_msg_enable_bits; /* should be 0x1 - only driver info msgs */
114 if (!dval)
115 return 0;
116 return (1 << dval) - 1;
117}
118
1da177e4
LT		 119/* defines only for the constants which don't work well as enums */
120#define ATA_TAG_POISON 0xfafbfcfdU
121
1da177e4
LT		 122enum {
123 /* various global constants */
124 LIBATA_MAX_PRD = ATA_MAX_PRD / 2,
d26fc955 125 LIBATA_DUMB_MAX_PRD = ATA_MAX_PRD / 4, /* Worst case */
1da177e4 126 ATA_DEF_QUEUE = 1,
2ab7db1f 127 /* tag ATA_MAX_QUEUE - 1 is reserved for internal commands */
a6e6ce8e 128 ATA_MAX_QUEUE = 32,
2ab7db1f 129 ATA_TAG_INTERNAL = ATA_MAX_QUEUE - 1,
341c2c95 130 ATA_SHORT_PAUSE = 16,
1da177e4 131
140b5e59
TH		 132 ATAPI_MAX_DRAIN = 16 << 10,
133
b558eddd
TH		 134 ATA_ALL_DEVICES = (1 << ATA_MAX_DEVICES) - 1,
135
1da177e4
LT		 136 ATA_SHT_EMULATED = 1,
137 ATA_SHT_CMD_PER_LUN = 1,
138 ATA_SHT_THIS_ID = -1,
cf482935 139 ATA_SHT_USE_CLUSTERING = 1,
1da177e4 140
dc34e7e1
SS		 141 /* struct ata_taskfile flags */
142 ATA_TFLAG_LBA48 = (1 << 0), /* enable 48-bit LBA and "HOB" */
143 ATA_TFLAG_ISADDR = (1 << 1), /* enable r/w to nsect/lba regs */
144 ATA_TFLAG_DEVICE = (1 << 2), /* enable r/w to device reg */
145 ATA_TFLAG_WRITE = (1 << 3), /* data dir: host->dev==1 (write) */
146 ATA_TFLAG_LBA = (1 << 4), /* enable LBA */
147 ATA_TFLAG_FUA = (1 << 5), /* enable FUA */
148 ATA_TFLAG_POLLING = (1 << 6), /* set nIEN to 1 and use polling */
149
150 /* protocol flags */
151 ATA_PROT_FLAG_PIO = (1 << 0), /* is PIO */
152 ATA_PROT_FLAG_DMA = (1 << 1), /* is DMA */
153 ATA_PROT_FLAG_DATA = ATA_PROT_FLAG_PIO | ATA_PROT_FLAG_DMA,
154 ATA_PROT_FLAG_NCQ = (1 << 2), /* is NCQ */
155 ATA_PROT_FLAG_ATAPI = (1 << 3), /* is ATAPI */
156
1da177e4 157 /* struct ata_device stuff */
949b38af
TH		 158 ATA_DFLAG_LBA = (1 << 0), /* device supports LBA */
159 ATA_DFLAG_LBA48 = (1 << 1), /* device supports LBA48 */
029f5468 160 ATA_DFLAG_CDB_INTR = (1 << 2), /* device asserts INTRQ when ready for CDB */
88e49034 161 ATA_DFLAG_NCQ = (1 << 3), /* device supports NCQ */
6fc49adb 162 ATA_DFLAG_FLUSH_EXT = (1 << 4), /* do FLUSH_EXT instead of FLUSH */
6746544c
TH		 163 ATA_DFLAG_ACPI_PENDING = (1 << 5), /* ACPI resume action pending */
164 ATA_DFLAG_ACPI_FAILED = (1 << 6), /* ACPI on devcfg has failed */
7d77b247 165 ATA_DFLAG_AN = (1 << 7), /* AN configured */
91163006 166 ATA_DFLAG_DMADIR = (1 << 10), /* device requires DMADIR */
2557164e 167 ATA_DFLAG_CFG_MASK = (1 << 12) - 1,
949b38af 168
2557164e
KCA		 169 ATA_DFLAG_PIO = (1 << 12), /* device limited to PIO mode */
170 ATA_DFLAG_NCQ_OFF = (1 << 13), /* device limited to non-NCQ mode */
054a5fba 171 ATA_DFLAG_SLEEPING = (1 << 15), /* device is sleeping */
00115e0f 172 ATA_DFLAG_DUBIOUS_XFER = (1 << 16), /* data transfer not verified */
45fabbb7 173 ATA_DFLAG_NO_UNLOAD = (1 << 17), /* device doesn't support unload */
445d211b 174 ATA_DFLAG_UNLOCK_HPA = (1 << 18), /* unlock HPA */
ed36911c 175 ATA_DFLAG_NCQ_SEND_RECV = (1 << 19), /* device supports NCQ SEND and RECV */
f20ded38 176 ATA_DFLAG_INIT_MASK = (1 << 24) - 1,
1da177e4 177
f20ded38
TH		 178 ATA_DFLAG_DETACH = (1 << 24),
179 ATA_DFLAG_DETACHED = (1 << 25),
abdda733 180
b1354cbb 181 ATA_DFLAG_DA = (1 << 26), /* device supports Device Attention */
65fe1f0f 182 ATA_DFLAG_DEVSLP = (1 << 27), /* device supports Device Sleep */
0d0cdb02 183 ATA_DFLAG_ACPI_DISABLED = (1 << 28), /* ACPI for the device is disabled */
b1354cbb 184
1da177e4
LT		 185 ATA_DEV_UNKNOWN = 0, /* unknown device */
186 ATA_DEV_ATA = 1, /* ATA device */
187 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */
188 ATA_DEV_ATAPI = 3, /* ATAPI device */
189 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */
e0a71752
TH		 190 ATA_DEV_PMP = 5, /* SATA port multiplier */
191 ATA_DEV_PMP_UNSUP = 6, /* SATA port multiplier (unsupported) */
192 ATA_DEV_SEMB = 7, /* SEMB */
193 ATA_DEV_SEMB_UNSUP = 8, /* SEMB (unsupported) */
194 ATA_DEV_NONE = 9, /* no device */
1da177e4 195
0c88758b 196 /* struct ata_link flags */
05944bdf 197 ATA_LFLAG_NO_HRST = (1 << 1), /* avoid hardreset */
ae791c05
TH		 198 ATA_LFLAG_NO_SRST = (1 << 2), /* avoid softreset */
199 ATA_LFLAG_ASSUME_ATA = (1 << 3), /* assume ATA class */
200 ATA_LFLAG_ASSUME_SEMB = (1 << 4), /* assume SEMB class */
201 ATA_LFLAG_ASSUME_CLASS = ATA_LFLAG_ASSUME_ATA | ATA_LFLAG_ASSUME_SEMB,
fd995f70 202 ATA_LFLAG_NO_RETRY = (1 << 5), /* don't retry this link */
f9df58cb 203 ATA_LFLAG_DISABLED = (1 << 6), /* link is disabled */
18f7ba4c 204 ATA_LFLAG_SW_ACTIVITY = (1 << 7), /* keep activity stats */
6b7ae954 205 ATA_LFLAG_NO_LPM = (1 << 8), /* disable LPM on this link */
ca6d43b0 206 ATA_LFLAG_RST_ONCE = (1 << 9), /* limit recovery to one reset */
0c88758b 207
1da177e4 208 /* struct ata_port flags */
949b38af 209 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */
1da177e4 210 /* (doesn't imply presence) */
949b38af 211 ATA_FLAG_SATA = (1 << 1),
949b38af
TH		 212 ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */
213 ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */
214 ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */
7395acb2
TH		 215 ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD
216 * doesn't handle PIO interrupts */
217 ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */
2a6e58d2
RW		 218 ATA_FLAG_NO_POWEROFF_SPINDOWN = (1 << 11), /* don't spindown before poweroff */
219 ATA_FLAG_NO_HIBERNATE_SPINDOWN = (1 << 12), /* don't spindown before hibernation */
7395acb2 220 ATA_FLAG_DEBUGMSG = (1 << 13),
388539f3 221 ATA_FLAG_FPDMA_AA = (1 << 14), /* driver supports Auto-Activate */
b2a8bbe6 222 ATA_FLAG_IGN_SIMPLEX = (1 << 15), /* ignore SIMPLEX */
f834e49f 223 ATA_FLAG_NO_IORDY = (1 << 16), /* controller lacks iordy */
3cadbcc0 224 ATA_FLAG_ACPI_SATA = (1 << 17), /* need native SATA ACPI layout */
9f45cbd3 225 ATA_FLAG_AN = (1 << 18), /* controller supports AN */
e0a71752 226 ATA_FLAG_PMP = (1 << 19), /* controller supports PMP */
40fb59e7 227 ATA_FLAG_FPDMA_AUX = (1 << 20), /* controller supports H2DFIS aux field */
18f7ba4c
KCA		 228 ATA_FLAG_EM = (1 << 21), /* driver supports enclosure
229 * management */
230 ATA_FLAG_SW_ACTIVITY = (1 << 22), /* driver supports sw activity
231 * led */
ae01b249 232 ATA_FLAG_NO_DIPM = (1 << 23), /* host not happy with DIPM */
949b38af 233
b51e9e5d 234 /* bits 24:31 of ap->flags are reserved for LLD specific flags */
9ec957f2 235
e3cf95dd 236
b51e9e5d
TH		 237 /* struct ata_port pflags */
238 ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */
239 ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */
240 ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */
241 ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */
242 ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */
b51e9e5d 243 ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */
f4d6d004 244 ATA_PFLAG_INITIALIZING = (1 << 7), /* being initialized, don't touch */
afaa5c37 245 ATA_PFLAG_RESETTING = (1 << 8), /* reset in progress */
ece180d1
TH		 246 ATA_PFLAG_UNLOADING = (1 << 9), /* driver is being unloaded */
247 ATA_PFLAG_UNLOADED = (1 << 10), /* driver is unloaded */
949b38af 248
b51e9e5d 249 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */
500530f6 250 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */
c05e6ff0 251 ATA_PFLAG_INIT_GTM_VALID = (1 << 19), /* initial gtm data valid */
949b38af 252
e3cf95dd
AC		 253 ATA_PFLAG_PIO32 = (1 << 20), /* 32bit PIO */
254 ATA_PFLAG_PIO32CHANGE = (1 << 21), /* 32bit PIO can be turned on/off */
255
949b38af
TH		 256 /* struct ata_queued_cmd flags */
257 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */
001102d7 258 ATA_QCFLAG_DMAMAP = (1 << 1), /* SG table is DMA mapped */
27197367 259 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */
e61e0672 260 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */
da917d69 261 ATA_QCFLAG_CLEAR_EXCL = (1 << 5), /* clear excl_link on completion */
e027bd36 262 ATA_QCFLAG_QUIET = (1 << 6), /* don't report device error */
03faab78 263 ATA_QCFLAG_RETRY = (1 << 7), /* retry after failure */
e61e0672 264
9ec957f2
TH		 265 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */
266 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */
267 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */
1da177e4 268
4e5ec5db 269 /* host set flags */
cca3974e 270 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */
ecef7253 271 ATA_HOST_STARTED = (1 << 1), /* Host started */
886ad09f 272 ATA_HOST_PARALLEL_SCAN = (1 << 2), /* Ports on this host can be scanned in parallel */
db63a4c8 273 ATA_HOST_IGNORE_ATA = (1 << 3), /* Ignore ATA devices on this host. */
9bec2e38 274
b8b275ef
TH		 275 /* bits 24:31 of host->flags are reserved for LLD specific flags */
276
1da177e4 277 /* various lengths of time */
341c2c95
TH		 278 ATA_TMOUT_BOOT = 30000, /* heuristic */
279 ATA_TMOUT_BOOT_QUICK = 7000, /* heuristic */
341c2c95 280 ATA_TMOUT_INTERNAL_QUICK = 5000,
45fabbb7 281 ATA_TMOUT_MAX_PARK = 30000,
1da177e4 282
b48d58f5
TH		 283 /*
284 * GoVault needs 2s and iVDR disk HHD424020F7SV00 800ms. 2s
285 * is too much without parallel probing. Use 2s if parallel
286 * probing is available, 800ms otherwise.
88ff6eaf 287 */
b48d58f5
TH		 288 ATA_TMOUT_FF_WAIT_LONG = 2000,
289 ATA_TMOUT_FF_WAIT = 800,
88ff6eaf 290
705e76be
TH		 291 /* Spec mandates to wait for ">= 2ms" before checking status
292 * after reset. We wait 150ms, because that was the magic
293 * delay used for ATAPI devices in Hale Landis's ATADRVR, for
294 * the period of time between when the ATA command register is
295 * written, and then status is checked. Because waiting for
296 * "a while" before checking status is fine, post SRST, we
297 * perform this magic delay here as well.
298 *
299 * Old drivers/ide uses the 2mS rule and then waits for ready.
300 */
341c2c95 301 ATA_WAIT_AFTER_RESET = 150,
705e76be 302
9dadd45b
TH		 303 /* If PMP is supported, we have to do follow-up SRST. As some
304 * PMPs don't send D2H Reg FIS after hardreset, LLDs are
305 * advised to wait only for the following duration before
306 * doing SRST.
307 */
e7d3ef13 308 ATA_TMOUT_PMP_SRST_WAIT = 5000,
9dadd45b 309
1da177e4
LT		 310 /* ATA bus states */
311 BUS_UNKNOWN = 0,
312 BUS_DMA = 1,
313 BUS_IDLE = 2,
314 BUS_NOINTR = 3,
315 BUS_NODATA = 4,
316 BUS_TIMER = 5,
317 BUS_PIO = 6,
318 BUS_EDD = 7,
319 BUS_IDENTIFY = 8,
320 BUS_PACKET = 9,
321
322 /* SATA port states */
323 PORT_UNKNOWN = 0,
324 PORT_ENABLED = 1,
325 PORT_DISABLED = 2,
326
327 /* encoding various smaller bitmaps into a single
7dc951ae 328 * unsigned long bitmap
1da177e4 329 */
70cd071e
TH		 330 ATA_NR_PIO_MODES = 7,
331 ATA_NR_MWDMA_MODES = 5,
332 ATA_NR_UDMA_MODES = 8,
1da7b0d0
TH		 333
334 ATA_SHIFT_PIO = 0,
70cd071e
TH		 335 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_NR_PIO_MODES,
336 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_NR_MWDMA_MODES,
337
cedc9a47
JG		 338 /* size of buffer to pad xfers ending on unaligned boundaries */
339 ATA_DMA_PAD_SZ = 4,
949b38af 340
0c247c55
TH		 341 /* ering size */
342 ATA_ERING_SIZE = 32,
343
31cc23b3
TH		 344 /* return values for ->qc_defer */
345 ATA_DEFER_LINK = 1,
346 ATA_DEFER_PORT = 2,
347
f3e81b19
TH		 348 /* desc_len for ata_eh_info and context */
349 ATA_EH_DESC_LEN = 80,
350
9be1e979
TH		 351 /* reset / recovery action types */
352 ATA_EH_REVALIDATE = (1 << 0),
cf480626
TH		 353 ATA_EH_SOFTRESET = (1 << 1), /* meaningful only in ->prereset */
354 ATA_EH_HARDRESET = (1 << 2), /* meaningful only in ->prereset */
355 ATA_EH_RESET = ATA_EH_SOFTRESET | ATA_EH_HARDRESET,
f9df58cb 356 ATA_EH_ENABLE_LINK = (1 << 3),
45fabbb7 357 ATA_EH_PARK = (1 << 5), /* unload heads and stop I/O */
9be1e979 358
45fabbb7 359 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE | ATA_EH_PARK,
b5b3fa38 360 ATA_EH_ALL_ACTIONS = ATA_EH_REVALIDATE | ATA_EH_RESET |
6b7ae954 361 ATA_EH_ENABLE_LINK,
9be1e979 362
f3e81b19 363 /* ata_eh_info->flags */
abdda733 364 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */
1cdaf534
TH		 365 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */
366 ATA_EHI_QUIET = (1 << 3), /* be quiet */
e2f3d75f 367 ATA_EHI_NO_RECOVERY = (1 << 4), /* no recovery */
abdda733 368
0d64a233
TH		 369 ATA_EHI_DID_SOFTRESET = (1 << 16), /* already soft-reset this port */
370 ATA_EHI_DID_HARDRESET = (1 << 17), /* already soft-reset this port */
371 ATA_EHI_PRINTINFO = (1 << 18), /* print configuration info */
372 ATA_EHI_SETMODE = (1 << 19), /* configure transfer mode */
89692c03 373 ATA_EHI_POST_SETMODE = (1 << 20), /* revalidating after setmode */
f3e81b19 374
0d64a233 375 ATA_EHI_DID_RESET = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET,
13abf50d 376
848e4c68
TH		 377 /* mask of flags to transfer *to* the slave link */
378 ATA_EHI_TO_SLAVE_MASK = ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET,
379
a1e10f7e
TH		 380 /* max tries if error condition is still set after ->error_handler */
381 ATA_EH_MAX_TRIES = 5,
ad9e2762 382
5040ab67
TH		 383 /* sometimes resuming a link requires several retries */
384 ATA_LINK_RESUME_TRIES = 5,
385
14d2bac1
TH		 386 /* how hard are we gonna try to probe/recover devices */
387 ATA_PROBE_MAX_TRIES = 3,
022bdb07 388 ATA_EH_DEV_TRIES = 3,
e0a71752
TH		 389 ATA_EH_PMP_TRIES = 5,
390 ATA_EH_PMP_LINK_TRIES = 3,
391
bf1bff6f 392 SATA_PMP_RW_TIMEOUT = 3000, /* PMP read/write timeout */
f5914a46 393
87fbc5a0
TH		 394 /* This should match the actual table size of
395 * ata_eh_cmd_timeout_table in libata-eh.c.
396 */
6013efd8 397 ATA_EH_CMD_TIMEOUT_TABLE_SIZE = 6,
87fbc5a0 398
93590859 399 /* Horkage types. May be set by libata or controller on drives
25985edc 400 (some horkage may be drive/controller pair dependent */
93590859
AC		 401
402 ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */
6919a0a6
AC		 403 ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */
404 ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */
18d6e9d5 405 ATA_HORKAGE_MAX_SEC_128 = (1 << 3), /* Limit max sects to 128 */
16c55b03 406 ATA_HORKAGE_BROKEN_HPA = (1 << 4), /* Broken HPA */
50af2fa1 407 ATA_HORKAGE_DISABLE = (1 << 5), /* Disable it */
93328e11 408 ATA_HORKAGE_HPA_SIZE = (1 << 6), /* native size off by one */
6bbfd53d 409 ATA_HORKAGE_IVB = (1 << 8), /* cbl det validity bit bugs */
2d3b8eea 410 ATA_HORKAGE_STUCK_ERR = (1 << 9), /* stuck ERR on next PACKET */
9ce8e307 411 ATA_HORKAGE_BRIDGE_OK = (1 << 10), /* no bridge limits */
6a87e42e
TH		 412 ATA_HORKAGE_ATAPI_MOD16_DMA = (1 << 11), /* use ATAPI DMA for commands
413 not multiple of 16 bytes */
877d0310 414 ATA_HORKAGE_FIRMWARE_WARN = (1 << 12), /* firmware update warning */
9062712f 415 ATA_HORKAGE_1_5_GBPS = (1 << 13), /* force 1.5 Gbps */
d0cb43b3 416 ATA_HORKAGE_NOSETXFER = (1 << 14), /* skip SETXFER, SATA only */
388539f3 417 ATA_HORKAGE_BROKEN_FPDMA_AA = (1 << 15), /* skip AA */
43c9c591 418 ATA_HORKAGE_DUMP_ID = (1 << 16), /* dump IDENTIFY data */
a32450e1 419 ATA_HORKAGE_MAX_SEC_LBA48 = (1 << 17), /* Set max sects to 65535 */
966fbe19 420 ATA_HORKAGE_ATAPI_DMADIR = (1 << 18), /* device requires dmadir */
f78dea06 421 ATA_HORKAGE_NO_NCQ_TRIM = (1 << 19), /* don't use queued TRIM */
ecd75ad5
TH		 422 ATA_HORKAGE_NOLPM = (1 << 20), /* don't use LPM */
423 ATA_HORKAGE_WD_BROKEN_LPM = (1 << 21), /* some WDs have broken LPM */
b3a70601 424
2dcb407e 425 /* DMA mask for user DMA control: User visible values; DO NOT
b3a70601
AC		 426 renumber */
427 ATA_DMA_MASK_ATA = (1 << 0), /* DMA on ATA Disk */
428 ATA_DMA_MASK_ATAPI = (1 << 1), /* DMA on ATAPI */
429 ATA_DMA_MASK_CFA = (1 << 2), /* DMA on CF Card */
ceb0c642
TH		 430
431 /* ATAPI command types */
432 ATAPI_READ = 0, /* READs */
433 ATAPI_WRITE = 1, /* WRITEs */
434 ATAPI_READ_CD = 2, /* READ CD [MSF] */
e52dcc48
TH		 435 ATAPI_PASS_THRU = 3, /* SAT pass-thru */
436 ATAPI_MISC = 4, /* the rest */
624d5c51
TH		 437
438 /* Timing constants */
439 ATA_TIMING_SETUP = (1 << 0),
440 ATA_TIMING_ACT8B = (1 << 1),
441 ATA_TIMING_REC8B = (1 << 2),
442 ATA_TIMING_CYC8B = (1 << 3),
443 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
444 ATA_TIMING_CYC8B,
445 ATA_TIMING_ACTIVE = (1 << 4),
446 ATA_TIMING_RECOVER = (1 << 5),
3ada9c12
DD		 447 ATA_TIMING_DMACK_HOLD = (1 << 6),
448 ATA_TIMING_CYCLE = (1 << 7),
449 ATA_TIMING_UDMA = (1 << 8),
624d5c51
TH		 450 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
451 ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
452 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
3ada9c12
DD		 453 ATA_TIMING_DMACK_HOLD | ATA_TIMING_CYCLE |
454 ATA_TIMING_UDMA,
f1bce7f8
TH		 455
456 /* ACPI constants */
457 ATA_ACPI_FILTER_SETXFER = 1 << 0,
458 ATA_ACPI_FILTER_LOCK = 1 << 1,
459 ATA_ACPI_FILTER_DIPM = 1 << 2,
fa5b561c
TH		 460 ATA_ACPI_FILTER_FPDMA_OFFSET = 1 << 3, /* FPDMA non-zero offset */
461 ATA_ACPI_FILTER_FPDMA_AA = 1 << 4, /* FPDMA auto activate */
f1bce7f8
TH		 462
463 ATA_ACPI_FILTER_DEFAULT = ATA_ACPI_FILTER_SETXFER |
464 ATA_ACPI_FILTER_LOCK |
465 ATA_ACPI_FILTER_DIPM,
1da177e4
LT		 466};
467
7dc951ae
TH		 468enum ata_xfer_mask {
469 ATA_MASK_PIO = ((1LU << ATA_NR_PIO_MODES) - 1)
470 << ATA_SHIFT_PIO,
471 ATA_MASK_MWDMA = ((1LU << ATA_NR_MWDMA_MODES) - 1)
472 << ATA_SHIFT_MWDMA,
473 ATA_MASK_UDMA = ((1LU << ATA_NR_UDMA_MODES) - 1)
474 << ATA_SHIFT_UDMA,
475};
476
14be71f4 477enum hsm_task_states {
c56b14d2 478 HSM_ST_IDLE, /* no command on going */
71527647
AL		 479 HSM_ST_FIRST, /* (waiting the device to)
480 write CDB or first data block */
c56b14d2
AL		 481 HSM_ST, /* (waiting the device to) transfer data */
482 HSM_ST_LAST, /* (waiting the device to) complete command */
c56b14d2 483 HSM_ST_ERR, /* error */
1da177e4
LT		 484};
485
a7dac447 486enum ata_completion_errors {
11a56d24
TH		 487 AC_ERR_DEV = (1 << 0), /* device reported error */
488 AC_ERR_HSM = (1 << 1), /* host state machine violation */
489 AC_ERR_TIMEOUT = (1 << 2), /* timeout */
490 AC_ERR_MEDIA = (1 << 3), /* media error */
491 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */
492 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */
493 AC_ERR_SYSTEM = (1 << 6), /* system error */
494 AC_ERR_INVALID = (1 << 7), /* invalid argument */
495 AC_ERR_OTHER = (1 << 8), /* unknown */
55a8e2c8 496 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */
5335b729 497 AC_ERR_NCQ = (1 << 10), /* marker for offending NCQ qc */
a7dac447
JG		 498};
499
c93b263e
TH		 500/*
501 * Link power management policy: If you alter this, you also need to
502 * alter libata-scsi.c (for the ascii descriptions)
503 */
504enum ata_lpm_policy {
505 ATA_LPM_UNKNOWN,
506 ATA_LPM_MAX_POWER,
507 ATA_LPM_MED_POWER,
508 ATA_LPM_MIN_POWER,
509};
510
6b7ae954
TH		 511enum ata_lpm_hints {
512 ATA_LPM_EMPTY = (1 << 0), /* port empty/probing */
513 ATA_LPM_HIPM = (1 << 1), /* may use HIPM */
514};
515
1da177e4
LT		 516/* forward declarations */
517struct scsi_device;
518struct ata_port_operations;
519struct ata_port;
cc0680a5 520struct ata_link;
1da177e4
LT		 521struct ata_queued_cmd;
522
523/* typedefs */
77853bf2 524typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
cc0680a5
TH		 525typedef int (*ata_prereset_fn_t)(struct ata_link *link, unsigned long deadline);
526typedef int (*ata_reset_fn_t)(struct ata_link *link, unsigned int *classes,
d4b2bab4 527 unsigned long deadline);
cc0680a5 528typedef void (*ata_postreset_fn_t)(struct ata_link *link, unsigned int *classes);
1da177e4 529
ee959b00 530extern struct device_attribute dev_attr_link_power_management_policy;
45fabbb7 531extern struct device_attribute dev_attr_unload_heads;
18f7ba4c
KCA		 532extern struct device_attribute dev_attr_em_message_type;
533extern struct device_attribute dev_attr_em_message;
534extern struct device_attribute dev_attr_sw_activity;
535
536enum sw_activity {
537 OFF,
538 BLINK_ON,
539 BLINK_OFF,
540};
ca77329f 541
dc34e7e1
SS		 542struct ata_taskfile {
543 unsigned long flags; /* ATA_TFLAG_xxx */
544 u8 protocol; /* ATA_PROT_xxx */
545
546 u8 ctl; /* control reg */
547
548 u8 hob_feature; /* additional data */
549 u8 hob_nsect; /* to support LBA48 */
550 u8 hob_lbal;
551 u8 hob_lbam;
552 u8 hob_lbah;
553
554 u8 feature;
555 u8 nsect;
556 u8 lbal;
557 u8 lbam;
558 u8 lbah;
559
560 u8 device;
561
562 u8 command; /* IO operation */
8be5ad9a
MC		 563
564 u32 auxiliary; /* auxiliary field */
565 /* from SATA 3.1 and */
566 /* ATA-8 ACS-3 */
dc34e7e1
SS		 567};
568
127102ae 569#ifdef CONFIG_ATA_SFF
1da177e4 570struct ata_ioports {
0d5ff566
TH		 571 void __iomem *cmd_addr;
572 void __iomem *data_addr;
573 void __iomem *error_addr;
574 void __iomem *feature_addr;
575 void __iomem *nsect_addr;
576 void __iomem *lbal_addr;
577 void __iomem *lbam_addr;
578 void __iomem *lbah_addr;
579 void __iomem *device_addr;
580 void __iomem *status_addr;
581 void __iomem *command_addr;
582 void __iomem *altstatus_addr;
583 void __iomem *ctl_addr;
9a7780c9 584#ifdef CONFIG_ATA_BMDMA
0d5ff566 585 void __iomem *bmdma_addr;
9a7780c9 586#endif /* CONFIG_ATA_BMDMA */
0d5ff566 587 void __iomem *scr_addr;
1da177e4 588};
127102ae 589#endif /* CONFIG_ATA_SFF */
1da177e4 590
cca3974e 591struct ata_host {
1da177e4
LT		 592 spinlock_t lock;
593 struct device *dev;
0d5ff566 594 void __iomem * const *iomap;
1da177e4 595 unsigned int n_ports;
1a112d10 596 unsigned int n_tags; /* nr of NCQ tags */
1da177e4 597 void *private_data;
029cfd6b 598 struct ata_port_operations *ops;
5444a6f4 599 unsigned long flags;
c0c362b6
TH		 600
601 struct mutex eh_mutex;
602 struct task_struct *eh_owner;
603
032af1ce 604 struct ata_port *simplex_claimed; /* channel owning the DMA */
f0eb62b8 605 struct ata_port *ports[0];
1da177e4
LT		 606};
607
608struct ata_queued_cmd {
609 struct ata_port *ap;
610 struct ata_device *dev;
611
612 struct scsi_cmnd *scsicmd;
613 void (*scsidone)(struct scsi_cmnd *);
614
615 struct ata_taskfile tf;
616 u8 cdb[ATAPI_CDB_LEN];
617
618 unsigned long flags; /* ATA_QCFLAG_xxx */
619 unsigned int tag;
620 unsigned int n_elem;
5825627c 621 unsigned int orig_n_elem;
1da177e4
LT		 622
623 int dma_dir;
624
5a5dbd18 625 unsigned int sect_size;
cedc9a47 626
1da177e4 627 unsigned int nbytes;
aacda375 628 unsigned int extrabytes;
1da177e4
LT		 629 unsigned int curbytes;
630
1da177e4 631 struct scatterlist sgent;
1da177e4 632
ff2aeb1e 633 struct scatterlist *sg;
1da177e4 634
b34e9042
RK		 635 struct scatterlist *cursg;
636 unsigned int cursg_ofs;
637
a22e2eb0 638 unsigned int err_mask;
e61e0672 639 struct ata_taskfile result_tf;
1da177e4
LT		 640 ata_qc_cb_t complete_fn;
641
1da177e4 642 void *private_data;
1c50dc83 643 void *lldd_task;
1da177e4
LT		 644};
645
cca3974e 646struct ata_port_stats {
1da177e4
LT		 647 unsigned long unhandled_irq;
648 unsigned long idle_irq;
649 unsigned long rw_reqbuf;
650};
651
0c247c55 652struct ata_ering_entry {
3884f7b0 653 unsigned int eflags;
0c247c55
TH		 654 unsigned int err_mask;
655 u64 timestamp;
656};
657
658struct ata_ering {
659 int cursor;
660 struct ata_ering_entry ring[ATA_ERING_SIZE];
661};
662
1da177e4 663struct ata_device {
9af5c9c9 664 struct ata_link *link;
72fa4b74 665 unsigned int devno; /* 0 or 1 */
75683fe7 666 unsigned int horkage; /* List of broken features */
6866e7bc 667 unsigned long flags; /* ATA_DFLAG_xxx */
3edebac4 668 struct scsi_device *sdev; /* attached SCSI device */
95514fd8 669 void *private_data;
fafbae87 670#ifdef CONFIG_ATA_ACPI
398e0782 671 union acpi_object *gtf_cache;
110f66d2 672 unsigned int gtf_filter;
afe75951
AL		 673#endif
674#ifdef CONFIG_SATA_ZPODD
675 void *zpodd;
fafbae87 676#endif
d9027470 677 struct device tdev;
99cf610a 678 /* n_sector is CLEAR_BEGIN, read comment above CLEAR_BEGIN */
72fa4b74 679 u64 n_sectors; /* size of device, if ATA */
5920dadf 680 u64 n_native_sectors; /* native size, if ATA */
1da177e4 681 unsigned int class; /* ATA_DEV_xxx */
45fabbb7 682 unsigned long unpark_deadline;
e0a71752 683
1da177e4
LT		 684 u8 pio_mode;
685 u8 dma_mode;
686 u8 xfer_mode;
687 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
688
8cbd6df1
AL		 689 unsigned int multi_count; /* sectors count for
690 READ/WRITE MULTIPLE */
b00eec1d 691 unsigned int max_sectors; /* per-device max sectors */
6e7846e9 692 unsigned int cdb_len;
8bf62ece 693
acf356b1 694 /* per-dev xfer mask */
7dc951ae
TH		 695 unsigned long pio_mask;
696 unsigned long mwdma_mask;
697 unsigned long udma_mask;
acf356b1 698
8bf62ece
AL		 699 /* for CHS addressing */
700 u16 cylinders; /* Number of cylinders */
701 u16 heads; /* Number of heads */
702 u16 sectors; /* Number of sectors per track */
0c247c55 703
f7e98930
JG		 704 union {
705 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
706 u32 gscr[SATA_PMP_GSCR_DWORDS]; /* PMP GSCR block */
707 };
99cf610a 708
803739d2
SH		 709 /* DEVSLP Timing Variables from Identify Device Data Log */
710 u8 devslp_timing[ATA_LOG_DEVSLP_SIZE];
65fe1f0f 711
ed36911c
MC		 712 /* NCQ send and receive log subcommand support */
713 u8 ncq_send_recv_cmds[ATA_LOG_NCQ_SEND_RECV_SIZE];
714
99cf610a
TH		 715 /* error history */
716 int spdn_cnt;
717 /* ering is CLEAR_END, read comment above CLEAR_END */
718 struct ata_ering ering;
1da177e4
LT		 719};
720
99cf610a
TH		 721/* Fields between ATA_DEVICE_CLEAR_BEGIN and ATA_DEVICE_CLEAR_END are
722 * cleared to zero on ata_dev_init().
72fa4b74 723 */
99cf610a
TH		 724#define ATA_DEVICE_CLEAR_BEGIN offsetof(struct ata_device, n_sectors)
725#define ATA_DEVICE_CLEAR_END offsetof(struct ata_device, ering)
72fa4b74 726
f3e81b19
TH		 727struct ata_eh_info {
728 struct ata_device *dev; /* offending device */
729 u32 serror; /* SError from LLDD */
730 unsigned int err_mask; /* port-wide err_mask */
731 unsigned int action; /* ATA_EH_* action mask */
47005f25 732 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */
f3e81b19 733 unsigned int flags; /* ATA_EHI_* flags */
abdda733 734
abdda733
TH		 735 unsigned int probe_mask;
736
f3e81b19
TH		 737 char desc[ATA_EH_DESC_LEN];
738 int desc_len;
739};
740
741struct ata_eh_context {
742 struct ata_eh_info i;
743 int tries[ATA_MAX_DEVICES];
87fbc5a0
TH		 744 int cmd_timeout_idx[ATA_MAX_DEVICES]
745 [ATA_EH_CMD_TIMEOUT_TABLE_SIZE];
abdda733
TH		 746 unsigned int classes[ATA_MAX_DEVICES];
747 unsigned int did_probe_mask;
45fabbb7 748 unsigned int unloaded_mask;
00115e0f
TH		 749 unsigned int saved_ncq_enabled;
750 u8 saved_xfer_mode[ATA_MAX_DEVICES];
0a2c0f56
TH		 751 /* timestamp for the last reset attempt or success */
752 unsigned long last_reset;
f3e81b19
TH		 753};
754
64578a3d
TH		 755struct ata_acpi_drive
756{
757 u32 pio;
758 u32 dma;
759} __packed;
760
761struct ata_acpi_gtm {
762 struct ata_acpi_drive drive[2];
763 u32 flags;
764} __packed;
765
9af5c9c9
TH		 766struct ata_link {
767 struct ata_port *ap;
8989805d 768 int pmp; /* port multiplier port # */
9af5c9c9 769
d9027470 770 struct device tdev;
9af5c9c9
TH		 771 unsigned int active_tag; /* active tag on this link */
772 u32 sactive; /* active NCQ commands */
773
0c88758b
TH		 774 unsigned int flags; /* ATA_LFLAG_xxx */
775
d127ea7b 776 u32 saved_scontrol; /* SControl on probe */
9af5c9c9
TH		 777 unsigned int hw_sata_spd_limit;
778 unsigned int sata_spd_limit;
779 unsigned int sata_spd; /* current SATA PHY speed */
6b7ae954 780 enum ata_lpm_policy lpm_policy;
9af5c9c9
TH		 781
782 /* record runtime error info, protected by host_set lock */
783 struct ata_eh_info eh_info;
784 /* EH context */
785 struct ata_eh_context eh_context;
786
787 struct ata_device device[ATA_MAX_DEVICES];
788};
d9027470
GG		 789#define ATA_LINK_CLEAR_BEGIN offsetof(struct ata_link, active_tag)
790#define ATA_LINK_CLEAR_END offsetof(struct ata_link, device[0])
9af5c9c9 791
1da177e4 792struct ata_port {
cca3974e 793 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */
029cfd6b 794 struct ata_port_operations *ops;
ba6a1308 795 spinlock_t *lock;
e3cf95dd
AC		 796 /* Flags owned by the EH context. Only EH should touch these once the
797 port is active */
1da177e4 798 unsigned long flags; /* ATA_FLAG_xxx */
e3cf95dd 799 /* Flags that change dynamically, protected by ap->lock */
b51e9e5d 800 unsigned int pflags; /* ATA_PFLAG_xxx */
44877b4e 801 unsigned int print_id; /* user visible unique port ID */
e628dc99 802 unsigned int local_port_no; /* host local port num */
44877b4e 803 unsigned int port_no; /* 0 based port no. inside the host */
1da177e4 804
127102ae 805#ifdef CONFIG_ATA_SFF
1da177e4 806 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
1da177e4
LT		 807 u8 ctl; /* cache of ATA control register */
808 u8 last_ctl; /* Cache last written value */
ea3c6450 809 struct ata_link* sff_pio_task_link; /* link currently used */
c429137a 810 struct delayed_work sff_pio_task;
9a7780c9 811#ifdef CONFIG_ATA_BMDMA
f60d7011
TH		 812 struct ata_bmdma_prd *bmdma_prd; /* BMDMA SG list */
813 dma_addr_t bmdma_prd_dma; /* and its DMA mapping */
9a7780c9 814#endif /* CONFIG_ATA_BMDMA */
5fe7454a
TH		 815#endif /* CONFIG_ATA_SFF */
816
1da177e4
LT		 817 unsigned int pio_mask;
818 unsigned int mwdma_mask;
819 unsigned int udma_mask;
820 unsigned int cbl; /* cable type; ATA_CBL_xxx */
1da177e4
LT		 821
822 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
8a8bc223 823 unsigned long qc_allocated;
dedaf2b0 824 unsigned int qc_active;
da917d69 825 int nr_active_links; /* #links with active qcs */
8a4aeec8 826 unsigned int last_tag; /* track next tag hw expects */
dedaf2b0 827
b1c72916
TH		 828 struct ata_link link; /* host default link */
829 struct ata_link *slave_link; /* see ata_slave_link_init() */
1da177e4 830
8989805d
TH		 831 int nr_pmp_links; /* nr of available PMP links */
832 struct ata_link *pmp_link; /* array of PMP links */
da917d69 833 struct ata_link *excl_link; /* for PMP qc exclusion */
8989805d 834
cca3974e
JG		 835 struct ata_port_stats stats;
836 struct ata_host *host;
2f1f610b 837 struct device *dev;
d9027470 838 struct device tdev;
1da177e4 839
ad72cf98 840 struct mutex scsi_scan_mutex;
52bad64d 841 struct delayed_work hotplug_task;
3b01b8af 842 struct work_struct scsi_rescan_task;
86e45b6b 843
14be71f4 844 unsigned int hsm_task_state;
1da177e4 845
bfd60579 846 u32 msg_enable;
a72ec4ce 847 struct list_head eh_done_q;
c6cf9e99 848 wait_queue_head_t eh_wait_q;
a1e10f7e 849 int eh_tries;
45fabbb7 850 struct completion park_req_pending;
bfd60579 851
500530f6 852 pm_message_t pm_mesg;
6b7ae954 853 enum ata_lpm_policy target_lpm_policy;
500530f6 854
5ddf24c5
TH		 855 struct timer_list fastdrain_timer;
856 unsigned long fastdrain_cnt;
857
18f7ba4c 858 int em_message_type;
1da177e4 859 void *private_data;
fe635c7e 860
fafbae87 861#ifdef CONFIG_ATA_ACPI
c05e6ff0 862 struct ata_acpi_gtm __acpi_init_gtm; /* use ata_acpi_init_gtm() */
fafbae87 863#endif
84bda12a
TH		 864 /* owned by EH */
865 u8 sector_buf[ATA_SECT_SIZE] ____cacheline_aligned;
1da177e4
LT		 866};
867
029cfd6b
TH		 868/* The following initializer overrides a method to NULL whether one of
869 * its parent has the method defined or not. This is equivalent to
870 * ERR_PTR(-ENOENT). Unfortunately, ERR_PTR doesn't render a constant
871 * expression and thus can't be used as an initializer.
872 */
873#define ATA_OP_NULL (void *)(unsigned long)(-ENOENT)
874
1da177e4 875struct ata_port_operations {
c1bc899f
TH		 876 /*
877 * Command execution
878 */
879 int (*qc_defer)(struct ata_queued_cmd *qc);
880 int (*check_atapi_dma)(struct ata_queued_cmd *qc);
881 void (*qc_prep)(struct ata_queued_cmd *qc);
882 unsigned int (*qc_issue)(struct ata_queued_cmd *qc);
22183bf5 883 bool (*qc_fill_rtf)(struct ata_queued_cmd *qc);
1da177e4 884
c1bc899f
TH		 885 /*
886 * Configuration and exception handling
887 */
888 int (*cable_detect)(struct ata_port *ap);
889 unsigned long (*mode_filter)(struct ata_device *dev, unsigned long xfer_mask);
890 void (*set_piomode)(struct ata_port *ap, struct ata_device *dev);
891 void (*set_dmamode)(struct ata_port *ap, struct ata_device *dev);
892 int (*set_mode)(struct ata_link *link, struct ata_device **r_failed_dev);
963e4975 893 unsigned int (*read_id)(struct ata_device *dev, struct ata_taskfile *tf, u16 *id);
1da177e4 894
c1bc899f 895 void (*dev_config)(struct ata_device *dev);
1da177e4 896
c1bc899f
TH		 897 void (*freeze)(struct ata_port *ap);
898 void (*thaw)(struct ata_port *ap);
a1efdaba
TH		 899 ata_prereset_fn_t prereset;
900 ata_reset_fn_t softreset;
901 ata_reset_fn_t hardreset;
902 ata_postreset_fn_t postreset;
903 ata_prereset_fn_t pmp_prereset;
904 ata_reset_fn_t pmp_softreset;
905 ata_reset_fn_t pmp_hardreset;
906 ata_postreset_fn_t pmp_postreset;
c1bc899f 907 void (*error_handler)(struct ata_port *ap);
c96f1732 908 void (*lost_interrupt)(struct ata_port *ap);
c1bc899f 909 void (*post_internal_cmd)(struct ata_queued_cmd *qc);
e4a9c373
DW		 910 void (*sched_eh)(struct ata_port *ap);
911 void (*end_eh)(struct ata_port *ap);
c1bc899f
TH		 912
913 /*
914 * Optional features
915 */
82ef04fb
TH		 916 int (*scr_read)(struct ata_link *link, unsigned int sc_reg, u32 *val);
917 int (*scr_write)(struct ata_link *link, unsigned int sc_reg, u32 val);
c1bc899f
TH		 918 void (*pmp_attach)(struct ata_port *ap);
919 void (*pmp_detach)(struct ata_port *ap);
6b7ae954
TH		 920 int (*set_lpm)(struct ata_link *link, enum ata_lpm_policy policy,
921 unsigned hints);
c1bc899f
TH		 922
923 /*
924 * Start, stop, suspend and resume
925 */
926 int (*port_suspend)(struct ata_port *ap, pm_message_t mesg);
927 int (*port_resume)(struct ata_port *ap);
928 int (*port_start)(struct ata_port *ap);
929 void (*port_stop)(struct ata_port *ap);
930 void (*host_stop)(struct ata_host *host);
931
127102ae 932#ifdef CONFIG_ATA_SFF
c1bc899f
TH		 933 /*
934 * SFF / taskfile oriented ops
935 */
5682ed33 936 void (*sff_dev_select)(struct ata_port *ap, unsigned int device);
41dec29b 937 void (*sff_set_devctl)(struct ata_port *ap, u8 ctl);
5682ed33
TH		 938 u8 (*sff_check_status)(struct ata_port *ap);
939 u8 (*sff_check_altstatus)(struct ata_port *ap);
940 void (*sff_tf_load)(struct ata_port *ap, const struct ata_taskfile *tf);
941 void (*sff_tf_read)(struct ata_port *ap, struct ata_taskfile *tf);
942 void (*sff_exec_command)(struct ata_port *ap,
943 const struct ata_taskfile *tf);
944 unsigned int (*sff_data_xfer)(struct ata_device *dev,
945 unsigned char *buf, unsigned int buflen, int rw);
e42a542b 946 void (*sff_irq_on)(struct ata_port *);
27943620 947 bool (*sff_irq_check)(struct ata_port *);
5682ed33 948 void (*sff_irq_clear)(struct ata_port *);
8244cd05 949 void (*sff_drain_fifo)(struct ata_queued_cmd *qc);
5682ed33 950
9a7780c9 951#ifdef CONFIG_ATA_BMDMA
c1bc899f
TH		 952 void (*bmdma_setup)(struct ata_queued_cmd *qc);
953 void (*bmdma_start)(struct ata_queued_cmd *qc);
954 void (*bmdma_stop)(struct ata_queued_cmd *qc);
955 u8 (*bmdma_status)(struct ata_port *ap);
9a7780c9 956#endif /* CONFIG_ATA_BMDMA */
127102ae 957#endif /* CONFIG_ATA_SFF */
c1bc899f 958
18f7ba4c
KCA		 959 ssize_t (*em_show)(struct ata_port *ap, char *buf);
960 ssize_t (*em_store)(struct ata_port *ap, const char *message,
961 size_t size);
962 ssize_t (*sw_activity_show)(struct ata_device *dev, char *buf);
963 ssize_t (*sw_activity_store)(struct ata_device *dev,
964 enum sw_activity val);
439d7a35
ML		 965 ssize_t (*transmit_led_message)(struct ata_port *ap, u32 state,
966 ssize_t size);
967
c1bc899f
TH		 968 /*
969 * Obsolete
9ec957f2 970 */
c1bc899f
TH		 971 void (*phy_reset)(struct ata_port *ap);
972 void (*eng_timeout)(struct ata_port *ap);
029cfd6b
TH		 973
974 /*
975 * ->inherits must be the last field and all the preceding
976 * fields must be pointers.
977 */
978 const struct ata_port_operations *inherits;
1da177e4
LT		 979};
980
981struct ata_port_info {
cca3974e 982 unsigned long flags;
0c88758b 983 unsigned long link_flags;
1da177e4
LT		 984 unsigned long pio_mask;
985 unsigned long mwdma_mask;
986 unsigned long udma_mask;
029cfd6b 987 struct ata_port_operations *port_ops;
e99f8b5e 988 void *private_data;
1da177e4
LT		 989};
990
452503f9
AC		 991struct ata_timing {
992 unsigned short mode; /* ATA mode */
993 unsigned short setup; /* t1 */
994 unsigned short act8b; /* t2 for 8-bit I/O */
995 unsigned short rec8b; /* t2i for 8-bit I/O */
996 unsigned short cyc8b; /* t0 for 8-bit I/O */
997 unsigned short active; /* t2 or tD */
998 unsigned short recover; /* t2i or tK */
3ada9c12 999 unsigned short dmack_hold; /* tj */
452503f9
AC		 1000 unsigned short cycle; /* t0 */
1001 unsigned short udma; /* t2CYCTYP/2 */
1002};
1003
624d5c51
TH		 1004/*
1005 * Core layer - drivers/ata/libata-core.c
1006 */
e9c83914
TH		 1007extern const unsigned long sata_deb_timing_normal[];
1008extern const unsigned long sata_deb_timing_hotplug[];
1009extern const unsigned long sata_deb_timing_long[];
1010
029cfd6b 1011extern struct ata_port_operations ata_dummy_port_ops;
21b0ad4f 1012extern const struct ata_port_info ata_dummy_port_info;
dd5b06c4 1013
dc34e7e1
SS		 1014/*
1015 * protocol tests
1016 */
1017static inline unsigned int ata_prot_flags(u8 prot)
1018{
1019 switch (prot) {
1020 case ATA_PROT_NODATA:
1021 return 0;
1022 case ATA_PROT_PIO:
1023 return ATA_PROT_FLAG_PIO;
1024 case ATA_PROT_DMA:
1025 return ATA_PROT_FLAG_DMA;
1026 case ATA_PROT_NCQ:
1027 return ATA_PROT_FLAG_DMA | ATA_PROT_FLAG_NCQ;
1028 case ATAPI_PROT_NODATA:
1029 return ATA_PROT_FLAG_ATAPI;
1030 case ATAPI_PROT_PIO:
1031 return ATA_PROT_FLAG_ATAPI | ATA_PROT_FLAG_PIO;
1032 case ATAPI_PROT_DMA:
1033 return ATA_PROT_FLAG_ATAPI | ATA_PROT_FLAG_DMA;
1034 }
1035 return 0;
1036}
1037
1038static inline int ata_is_atapi(u8 prot)
1039{
1040 return ata_prot_flags(prot) & ATA_PROT_FLAG_ATAPI;
1041}
1042
1043static inline int ata_is_nodata(u8 prot)
1044{
1045 return !(ata_prot_flags(prot) & ATA_PROT_FLAG_DATA);
1046}
1047
1048static inline int ata_is_pio(u8 prot)
1049{
1050 return ata_prot_flags(prot) & ATA_PROT_FLAG_PIO;
1051}
1052
1053static inline int ata_is_dma(u8 prot)
1054{
1055 return ata_prot_flags(prot) & ATA_PROT_FLAG_DMA;
1056}
1057
1058static inline int ata_is_ncq(u8 prot)
1059{
1060 return ata_prot_flags(prot) & ATA_PROT_FLAG_NCQ;
1061}
1062
1063static inline int ata_is_data(u8 prot)
1064{
1065 return ata_prot_flags(prot) & ATA_PROT_FLAG_DATA;
1066}
1067
1068static inline int is_multi_taskfile(struct ata_taskfile *tf)
1069{
1070 return (tf->command == ATA_CMD_READ_MULTI) ||
1071 (tf->command == ATA_CMD_WRITE_MULTI) ||
1072 (tf->command == ATA_CMD_READ_MULTI_EXT) ||
1073 (tf->command == ATA_CMD_WRITE_MULTI_EXT) ||
1074 (tf->command == ATA_CMD_WRITE_MULTI_FUA_EXT);
1075}
1076
e9c83914
TH		 1077static inline const unsigned long *
1078sata_ehc_deb_timing(struct ata_eh_context *ehc)
1079{
1080 if (ehc->i.flags & ATA_EHI_HOTPLUGGED)
1081 return sata_deb_timing_hotplug;
1082 else
1083 return sata_deb_timing_normal;
1084}
d7bb4cc7 1085
dd5b06c4
TH		 1086static inline int ata_port_is_dummy(struct ata_port *ap)
1087{
1088 return ap->ops == &ata_dummy_port_ops;
1089}
1090
936fd732 1091extern int sata_set_spd(struct ata_link *link);
0aa1113d 1092extern int ata_std_prereset(struct ata_link *link, unsigned long deadline);
aa2731ad
TH		 1093extern int ata_wait_after_reset(struct ata_link *link, unsigned long deadline,
1094 int (*check_ready)(struct ata_link *link));
936fd732
TH		 1095extern int sata_link_debounce(struct ata_link *link,
1096 const unsigned long *params, unsigned long deadline);
1097extern int sata_link_resume(struct ata_link *link, const unsigned long *params,
1098 unsigned long deadline);
1152b261
TH		 1099extern int sata_link_scr_lpm(struct ata_link *link, enum ata_lpm_policy policy,
1100 bool spm_wakeup);
cc0680a5 1101extern int sata_link_hardreset(struct ata_link *link,
9dadd45b
TH		 1102 const unsigned long *timing, unsigned long deadline,
1103 bool *online, int (*check_ready)(struct ata_link *));
57c9efdf
TH		 1104extern int sata_std_hardreset(struct ata_link *link, unsigned int *class,
1105 unsigned long deadline);
203c75b8 1106extern void ata_std_postreset(struct ata_link *link, unsigned int *classes);
2855568b 1107
f3187195 1108extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports);
f5cda257
TH		 1109extern struct ata_host *ata_host_alloc_pinfo(struct device *dev,
1110 const struct ata_port_info * const * ppi, int n_ports);
b1c72916 1111extern int ata_slave_link_init(struct ata_port *ap);
ecef7253 1112extern int ata_host_start(struct ata_host *host);
f3187195
TH		 1113extern int ata_host_register(struct ata_host *host,
1114 struct scsi_host_template *sht);
f5cda257
TH		 1115extern int ata_host_activate(struct ata_host *host, int irq,
1116 irq_handler_t irq_handler, unsigned long irq_flags,
1117 struct scsi_host_template *sht);
0529c159 1118extern void ata_host_detach(struct ata_host *host);
8d8e7d13 1119extern void ata_host_init(struct ata_host *, struct device *, struct ata_port_operations *);
193515d5 1120extern int ata_scsi_detect(struct scsi_host_template *sht);
1da177e4 1121extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
f281233d 1122extern int ata_scsi_queuecmd(struct Scsi_Host *h, struct scsi_cmnd *cmd);
94be9a58
JG		 1123extern int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *dev,
1124 int cmd, void __user *arg);
80289167 1125extern void ata_sas_port_destroy(struct ata_port *);
cca3974e 1126extern struct ata_port *ata_sas_port_alloc(struct ata_host *,
80289167 1127 struct ata_port_info *, struct Scsi_Host *);
b2024459
DW		 1128extern void ata_sas_async_probe(struct ata_port *ap);
1129extern int ata_sas_sync_probe(struct ata_port *ap);
80289167
BK		 1130extern int ata_sas_port_init(struct ata_port *);
1131extern int ata_sas_port_start(struct ata_port *ap);
1132extern void ata_sas_port_stop(struct ata_port *ap);
1133extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *);
b27dcfb0 1134extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, struct ata_port *ap);
936fd732
TH		 1135extern int sata_scr_valid(struct ata_link *link);
1136extern int sata_scr_read(struct ata_link *link, int reg, u32 *val);
1137extern int sata_scr_write(struct ata_link *link, int reg, u32 val);
1138extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val);
b5b3fa38
TH		 1139extern bool ata_link_online(struct ata_link *link);
1140extern bool ata_link_offline(struct ata_link *link);
6ffa01d8 1141#ifdef CONFIG_PM
cca3974e
JG		 1142extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg);
1143extern void ata_host_resume(struct ata_host *host);
bc6e7c4b
DW		 1144extern void ata_sas_port_suspend(struct ata_port *ap);
1145extern void ata_sas_port_resume(struct ata_port *ap);
2fcbdcb4 1146#else
bc6e7c4b 1147static inline void ata_sas_port_suspend(struct ata_port *ap)
2fcbdcb4 1148{
2fcbdcb4 1149}
a5a65699
RD		 1150static inline void ata_sas_port_resume(struct ata_port *ap)
1151{
1152}
6ffa01d8 1153#endif
67846b30 1154extern int ata_ratelimit(void);
97750ceb
TH		 1155extern void ata_msleep(struct ata_port *ap, unsigned int msecs);
1156extern u32 ata_wait_register(struct ata_port *ap, void __iomem *reg, u32 mask,
1157 u32 val, unsigned long interval, unsigned long timeout);
436d34b3 1158extern int atapi_cmd_type(u8 opcode);
9977126c
TH		 1159extern void ata_tf_to_fis(const struct ata_taskfile *tf,
1160 u8 pmp, int is_cmd, u8 *fis);
057ace5e 1161extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
7dc951ae
TH		 1162extern unsigned long ata_pack_xfermask(unsigned long pio_mask,
1163 unsigned long mwdma_mask, unsigned long udma_mask);
1164extern void ata_unpack_xfermask(unsigned long xfer_mask,
1165 unsigned long *pio_mask, unsigned long *mwdma_mask,
1166 unsigned long *udma_mask);
1167extern u8 ata_xfer_mask2mode(unsigned long xfer_mask);
1168extern unsigned long ata_xfer_mode2mask(u8 xfer_mode);
1169extern int ata_xfer_mode2shift(unsigned long xfer_mode);
1170extern const char *ata_mode_string(unsigned long xfer_mask);
1171extern unsigned long ata_id_xfermask(const u16 *id);
31cc23b3 1172extern int ata_std_qc_defer(struct ata_queued_cmd *qc);
e46834cd 1173extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
1da177e4
LT		 1174extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
1175 unsigned int n_elem);
057ace5e 1176extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
10305f0f 1177extern void ata_dev_disable(struct ata_device *adev);
6a62a04d
TH		 1178extern void ata_id_string(const u16 *id, unsigned char *s,
1179 unsigned int ofs, unsigned int len);
1180extern void ata_id_c_string(const u16 *id, unsigned char *s,
1181 unsigned int ofs, unsigned int len);
963e4975
AC		 1182extern unsigned int ata_do_dev_read_id(struct ata_device *dev,
1183 struct ata_taskfile *tf, u16 *id);
f686bcb8 1184extern void ata_qc_complete(struct ata_queued_cmd *qc);
79f97dad 1185extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active);
b27dcfb0 1186extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd);
1da177e4
LT		 1187extern int ata_std_bios_param(struct scsi_device *sdev,
1188 struct block_device *bdev,
1189 sector_t capacity, int geom[]);
d8d9129e 1190extern void ata_scsi_unlock_native_capacity(struct scsi_device *sdev);
1da177e4 1191extern int ata_scsi_slave_config(struct scsi_device *sdev);
83c47bcb 1192extern void ata_scsi_slave_destroy(struct scsi_device *sdev);
a6e6ce8e 1193extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
e881a172 1194 int queue_depth, int reason);
f6e67035
DW		 1195extern int __ata_change_queue_depth(struct ata_port *ap, struct scsi_device *sdev,
1196 int queue_depth, int reason);
3373efd8 1197extern struct ata_device *ata_dev_pair(struct ata_device *adev);
0260731f 1198extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev);
0e0b494c
JB		 1199extern void ata_scsi_port_error_handler(struct Scsi_Host *host, struct ata_port *ap);
1200extern void ata_scsi_cmd_error_handler(struct Scsi_Host *host, struct ata_port *ap, struct list_head *eh_q);
1da177e4 1201
be0d18df
AC		 1202extern int ata_cable_40wire(struct ata_port *ap);
1203extern int ata_cable_80wire(struct ata_port *ap);
1204extern int ata_cable_sata(struct ata_port *ap);
c88f90c3 1205extern int ata_cable_ignore(struct ata_port *ap);
be0d18df
AC		 1206extern int ata_cable_unknown(struct ata_port *ap);
1207
624d5c51 1208/* Timing helpers */
1bc4ccff 1209extern unsigned int ata_pio_need_iordy(const struct ata_device *);
6357357c 1210extern const struct ata_timing *ata_timing_find_mode(u8 xfer_mode);
452503f9
AC		 1211extern int ata_timing_compute(struct ata_device *, unsigned short,
1212 struct ata_timing *, int, int);
1213extern void ata_timing_merge(const struct ata_timing *,
1214 const struct ata_timing *, struct ata_timing *,
1215 unsigned int);
a0f79b92 1216extern u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle);
452503f9 1217
624d5c51
TH		 1218/* PCI */
1219#ifdef CONFIG_PCI
1220struct pci_dev;
1221
1222struct pci_bits {
1223 unsigned int reg; /* PCI config register to read */
1224 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
1225 unsigned long mask;
1226 unsigned long val;
452503f9
AC		 1227};
1228
624d5c51
TH		 1229extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
1230extern void ata_pci_remove_one(struct pci_dev *pdev);
1231
1232#ifdef CONFIG_PM
1233extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg);
1234extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev);
1235extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
1236extern int ata_pci_device_resume(struct pci_dev *pdev);
1237#endif /* CONFIG_PM */
1238#endif /* CONFIG_PCI */
1239
b7db04d9
BN		 1240struct platform_device;
1241
1242extern int ata_platform_remove_one(struct platform_device *pdev);
1243
624d5c51
TH		 1244/*
1245 * ACPI - drivers/ata/libata-acpi.c
1246 */
e1ddb4b6 1247#ifdef CONFIG_ATA_ACPI
c05e6ff0
TH		 1248static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
1249{
1250 if (ap->pflags & ATA_PFLAG_INIT_GTM_VALID)
1251 return &ap->__acpi_init_gtm;
1252 return NULL;
1253}
0d02f0b2
TH		 1254int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm);
1255int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *stm);
7c77fa4d
TH		 1256unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev,
1257 const struct ata_acpi_gtm *gtm);
021ee9a6 1258int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm);
e1ddb4b6 1259#else
c05e6ff0
TH		 1260static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
1261{
1262 return NULL;
1263}
7c77fa4d
TH		 1264
1265static inline int ata_acpi_stm(const struct ata_port *ap,
1266 struct ata_acpi_gtm *stm)
1267{
1268 return -ENOSYS;
1269}
1270
1271static inline int ata_acpi_gtm(const struct ata_port *ap,
1272 struct ata_acpi_gtm *stm)
1273{
1274 return -ENOSYS;
1275}
1276
1277static inline unsigned int ata_acpi_gtm_xfermask(struct ata_device *dev,
1278 const struct ata_acpi_gtm *gtm)
1279{
1280 return 0;
1281}
021ee9a6
TH		 1282
1283static inline int ata_acpi_cbl_80wire(struct ata_port *ap,
1284 const struct ata_acpi_gtm *gtm)
1285{
1286 return 0;
1287}
e1ddb4b6 1288#endif
1da177e4 1289
ece1d636 1290/*
624d5c51 1291 * EH - drivers/ata/libata-eh.c
ece1d636 1292 */
7b70fc03 1293extern void ata_port_schedule_eh(struct ata_port *ap);
81c757bc 1294extern void ata_port_wait_eh(struct ata_port *ap);
dbd82616 1295extern int ata_link_abort(struct ata_link *link);
7b70fc03 1296extern int ata_port_abort(struct ata_port *ap);
e3180499 1297extern int ata_port_freeze(struct ata_port *ap);
7d77b247 1298extern int sata_async_notification(struct ata_port *ap);
e3180499
TH		 1299
1300extern void ata_eh_freeze_port(struct ata_port *ap);
1301extern void ata_eh_thaw_port(struct ata_port *ap);
7b70fc03 1302
ece1d636
TH		 1303extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
1304extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
10acf3b0 1305extern void ata_eh_analyze_ncq_error(struct ata_link *link);
ece1d636 1306
f5914a46
TH		 1307extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
1308 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
1309 ata_postreset_fn_t postreset);
a1efdaba 1310extern void ata_std_error_handler(struct ata_port *ap);
e4a9c373
DW		 1311extern void ata_std_sched_eh(struct ata_port *ap);
1312extern void ata_std_end_eh(struct ata_port *ap);
8a745f1f 1313extern int ata_link_nr_enabled(struct ata_link *link);
022bdb07 1314
68d1d07b
TH		 1315/*
1316 * Base operations to inherit from and initializers for sht
1317 *
1318 * Operations
1319 *
1320 * base : Common to all libata drivers.
1321 * sata : SATA controllers w/ native interface.
1322 * pmp : SATA controllers w/ PMP support.
1323 * sff : SFF ATA controllers w/o BMDMA support.
1324 * bmdma : SFF ATA controllers w/ BMDMA support.
1325 *
1326 * sht initializers
1327 *
1328 * BASE : Common to all libata drivers. The user must set
1329 * sg_tablesize and dma_boundary.
1330 * PIO : SFF ATA controllers w/ only PIO support.
1331 * BMDMA : SFF ATA controllers w/ BMDMA support. sg_tablesize and
1332 * dma_boundary are set to BMDMA limits.
1333 * NCQ : SATA controllers supporting NCQ. The user must set
1334 * sg_tablesize, dma_boundary and can_queue.
1335 */
1336extern const struct ata_port_operations ata_base_port_ops;
1337extern const struct ata_port_operations sata_port_ops;
45fabbb7 1338extern struct device_attribute *ata_common_sdev_attrs[];
68d1d07b
TH		 1339
1340#define ATA_BASE_SHT(drv_name) \
1341 .module = THIS_MODULE, \
1342 .name = drv_name, \
1343 .ioctl = ata_scsi_ioctl, \
1344 .queuecommand = ata_scsi_queuecmd, \
1345 .can_queue = ATA_DEF_QUEUE, \
1346 .this_id = ATA_SHT_THIS_ID, \
1347 .cmd_per_lun = ATA_SHT_CMD_PER_LUN, \
1348 .emulated = ATA_SHT_EMULATED, \
1349 .use_clustering = ATA_SHT_USE_CLUSTERING, \
1350 .proc_name = drv_name, \
1351 .slave_configure = ata_scsi_slave_config, \
1352 .slave_destroy = ata_scsi_slave_destroy, \
45fabbb7 1353 .bios_param = ata_std_bios_param, \
d8d9129e 1354 .unlock_native_capacity = ata_scsi_unlock_native_capacity, \
45fabbb7 1355 .sdev_attrs = ata_common_sdev_attrs
68d1d07b 1356
68d1d07b
TH		 1357#define ATA_NCQ_SHT(drv_name) \
1358 ATA_BASE_SHT(drv_name), \
1359 .change_queue_depth = ata_scsi_change_queue_depth
1360
071f44b1
TH		 1361/*
1362 * PMP helpers
1363 */
88fcd562 1364#ifdef CONFIG_SATA_PMP
071f44b1
TH		 1365static inline bool sata_pmp_supported(struct ata_port *ap)
1366{
1367 return ap->flags & ATA_FLAG_PMP;
1368}
1369
1370static inline bool sata_pmp_attached(struct ata_port *ap)
1371{
1372 return ap->nr_pmp_links != 0;
1373}
1374
1375static inline int ata_is_host_link(const struct ata_link *link)
1376{
b1c72916 1377 return link == &link->ap->link || link == link->ap->slave_link;
071f44b1 1378}
88fcd562
TH		 1379#else /* CONFIG_SATA_PMP */
1380static inline bool sata_pmp_supported(struct ata_port *ap)
1381{
1382 return false;
1383}
1384
1385static inline bool sata_pmp_attached(struct ata_port *ap)
1386{
1387 return false;
1388}
1389
1390static inline int ata_is_host_link(const struct ata_link *link)
1391{
1392 return 1;
1393}
1394#endif /* CONFIG_SATA_PMP */
071f44b1
TH		 1395
1396static inline int sata_srst_pmp(struct ata_link *link)
1397{
1398 if (sata_pmp_supported(link->ap) && ata_is_host_link(link))
1399 return SATA_PMP_CTRL_PORT;
1400 return link->pmp;
1401}
1402
61440db6
TH		 1403/*
1404 * printk helpers
1405 */
b9075fa9 1406__printf(3, 4)
a9a79dfe
JP		 1407int ata_port_printk(const struct ata_port *ap, const char *level,
1408 const char *fmt, ...);
b9075fa9 1409__printf(3, 4)
a9a79dfe
JP		 1410int ata_link_printk(const struct ata_link *link, const char *level,
1411 const char *fmt, ...);
b9075fa9 1412__printf(3, 4)
a9a79dfe
JP		 1413int ata_dev_printk(const struct ata_device *dev, const char *level,
1414 const char *fmt, ...);
1415
1416#define ata_port_err(ap, fmt, ...) \
1417 ata_port_printk(ap, KERN_ERR, fmt, ##__VA_ARGS__)
1418#define ata_port_warn(ap, fmt, ...) \
1419 ata_port_printk(ap, KERN_WARNING, fmt, ##__VA_ARGS__)
1420#define ata_port_notice(ap, fmt, ...) \
1421 ata_port_printk(ap, KERN_NOTICE, fmt, ##__VA_ARGS__)
1422#define ata_port_info(ap, fmt, ...) \
1423 ata_port_printk(ap, KERN_INFO, fmt, ##__VA_ARGS__)
1424#define ata_port_dbg(ap, fmt, ...) \
1425 ata_port_printk(ap, KERN_DEBUG, fmt, ##__VA_ARGS__)
1426
1427#define ata_link_err(link, fmt, ...) \
1428 ata_link_printk(link, KERN_ERR, fmt, ##__VA_ARGS__)
1429#define ata_link_warn(link, fmt, ...) \
1430 ata_link_printk(link, KERN_WARNING, fmt, ##__VA_ARGS__)
1431#define ata_link_notice(link, fmt, ...) \
1432 ata_link_printk(link, KERN_NOTICE, fmt, ##__VA_ARGS__)
1433#define ata_link_info(link, fmt, ...) \
1434 ata_link_printk(link, KERN_INFO, fmt, ##__VA_ARGS__)
1435#define ata_link_dbg(link, fmt, ...) \
1436 ata_link_printk(link, KERN_DEBUG, fmt, ##__VA_ARGS__)
1437
1438#define ata_dev_err(dev, fmt, ...) \
1439 ata_dev_printk(dev, KERN_ERR, fmt, ##__VA_ARGS__)
1440#define ata_dev_warn(dev, fmt, ...) \
1441 ata_dev_printk(dev, KERN_WARNING, fmt, ##__VA_ARGS__)
1442#define ata_dev_notice(dev, fmt, ...) \
1443 ata_dev_printk(dev, KERN_NOTICE, fmt, ##__VA_ARGS__)
1444#define ata_dev_info(dev, fmt, ...) \
1445 ata_dev_printk(dev, KERN_INFO, fmt, ##__VA_ARGS__)
1446#define ata_dev_dbg(dev, fmt, ...) \
1447 ata_dev_printk(dev, KERN_DEBUG, fmt, ##__VA_ARGS__)
1da177e4 1448
06296a1e
JP		 1449void ata_print_version(const struct device *dev, const char *version);
1450
f3e81b19
TH		 1451/*
1452 * ata_eh_info helpers
1453 */
b9075fa9
JP		 1454extern __printf(2, 3)
1455void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...);
1456extern __printf(2, 3)
1457void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...);
b64bbc39 1458extern void ata_ehi_clear_desc(struct ata_eh_info *ehi);
f3e81b19 1459
c0b6c037
TH		 1460static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
1461{
b558eddd 1462 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
f8f1e1cc 1463 ehi->flags |= ATA_EHI_HOTPLUGGED;
b558eddd 1464 ehi->action |= ATA_EH_RESET | ATA_EH_ENABLE_LINK;
c0b6c037
TH		 1465 ehi->err_mask |= AC_ERR_ATA_BUS;
1466}
1467
cbcdd875
TH		 1468/*
1469 * port description helpers
1470 */
b9075fa9
JP		 1471extern __printf(2, 3)
1472void ata_port_desc(struct ata_port *ap, const char *fmt, ...);
cbcdd875
TH		 1473#ifdef CONFIG_PCI
1474extern void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset,
1475 const char *name);
1476#endif
1477
1da177e4
LT		 1478static inline unsigned int ata_tag_valid(unsigned int tag)
1479{
1480 return (tag < ATA_MAX_QUEUE) ? 1 : 0;
1481}
1482
2ab7db1f
TH		 1483static inline unsigned int ata_tag_internal(unsigned int tag)
1484{
83c063dd 1485 return tag == ATA_TAG_INTERNAL;
2ab7db1f
TH		 1486}
1487
5806db22
TH		 1488/*
1489 * device helpers
1490 */
e1211e3f 1491static inline unsigned int ata_class_enabled(unsigned int class)
597afd21 1492{
e0a71752
TH		 1493 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI ||
1494 class == ATA_DEV_PMP || class == ATA_DEV_SEMB;
597afd21
TH		 1495}
1496
e1211e3f 1497static inline unsigned int ata_class_disabled(unsigned int class)
1da177e4 1498{
e0a71752
TH		 1499 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP ||
1500 class == ATA_DEV_PMP_UNSUP || class == ATA_DEV_SEMB_UNSUP;
e1211e3f
TH		 1501}
1502
002c8054
TH		 1503static inline unsigned int ata_class_absent(unsigned int class)
1504{
1505 return !ata_class_enabled(class) && !ata_class_disabled(class);
1506}
1507
e1211e3f
TH		 1508static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
1509{
1510 return ata_class_enabled(dev->class);
1511}
1512
1513static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
1514{
1515 return ata_class_disabled(dev->class);
1da177e4
LT		 1516}
1517
002c8054
TH		 1518static inline unsigned int ata_dev_absent(const struct ata_device *dev)
1519{
1520 return ata_class_absent(dev->class);
1521}
1522
5806db22 1523/*
f58229f8 1524 * link helpers
5806db22 1525 */
f58229f8 1526static inline int ata_link_max_devices(const struct ata_link *link)
5806db22 1527{
8989805d 1528 if (ata_is_host_link(link) && link->ap->flags & ATA_FLAG_SLAVE_POSS)
5806db22
TH		 1529 return 2;
1530 return 1;
1531}
1532
da917d69
TH		 1533static inline int ata_link_active(struct ata_link *link)
1534{
1535 return ata_tag_valid(link->active_tag) || link->sactive;
1536}
1537
1eca4365
TH		 1538/*
1539 * Iterators
1540 *
1541 * ATA_LITER_* constants are used to select link iteration mode and
1542 * ATA_DITER_* device iteration mode.
1543 *
1544 * For a custom iteration directly using ata_{link|dev}_next(), if
1545 * @link or @dev, respectively, is NULL, the first element is
1546 * returned. @dev and @link can be any valid device or link and the
1547 * next element according to the iteration mode will be returned.
1548 * After the last element, NULL is returned.
1549 */
1550enum ata_link_iter_mode {
1551 ATA_LITER_EDGE, /* if present, PMP links only; otherwise,
1552 * host link. no slave link */
1553 ATA_LITER_HOST_FIRST, /* host link followed by PMP or slave links */
1554 ATA_LITER_PMP_FIRST, /* PMP links followed by host link,
1555 * slave link still comes after host link */
1556};
1557
1558enum ata_dev_iter_mode {
1559 ATA_DITER_ENABLED,
1560 ATA_DITER_ENABLED_REVERSE,
1561 ATA_DITER_ALL,
1562 ATA_DITER_ALL_REVERSE,
1563};
1564
1565extern struct ata_link *ata_link_next(struct ata_link *link,
1566 struct ata_port *ap,
1567 enum ata_link_iter_mode mode);
1568
1569extern struct ata_device *ata_dev_next(struct ata_device *dev,
1570 struct ata_link *link,
1571 enum ata_dev_iter_mode mode);
1572
1573/*
1574 * Shortcut notation for iterations
1575 *
1576 * ata_for_each_link() iterates over each link of @ap according to
1577 * @mode. @link points to the current link in the loop. @link is
1578 * NULL after loop termination. ata_for_each_dev() works the same way
1579 * except that it iterates over each device of @link.
1580 *
1581 * Note that the mode prefixes ATA_{L|D}ITER_ shouldn't need to be
1582 * specified when using the following shorthand notations. Only the
1583 * mode itself (EDGE, HOST_FIRST, ENABLED, etc...) should be
1584 * specified. This not only increases brevity but also makes it
1585 * impossible to use ATA_LITER_* for device iteration or vice-versa.
1586 */
1587#define ata_for_each_link(link, ap, mode) \
1588 for ((link) = ata_link_next(NULL, (ap), ATA_LITER_##mode); (link); \
1589 (link) = ata_link_next((link), (ap), ATA_LITER_##mode))
1590
1591#define ata_for_each_dev(dev, link, mode) \
1592 for ((dev) = ata_dev_next(NULL, (link), ATA_DITER_##mode); (dev); \
1593 (dev) = ata_dev_next((dev), (link), ATA_DITER_##mode))
5806db22 1594
6d1245bf
TH		 1595/**
1596 * ata_ncq_enabled - Test whether NCQ is enabled
1597 * @dev: ATA device to test for
1598 *
1599 * LOCKING:
1600 * spin_lock_irqsave(host lock)
1601 *
1602 * RETURNS:
1603 * 1 if NCQ is enabled for @dev, 0 otherwise.
1604 */
1605static inline int ata_ncq_enabled(struct ata_device *dev)
1606{
1607 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF |
1608 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ;
1609}
0baab86b 1610
87fb6c31
MC		 1611static inline bool ata_fpdma_dsm_supported(struct ata_device *dev)
1612{
1613 return (dev->flags & ATA_DFLAG_NCQ_SEND_RECV) &&
1614 (dev->ncq_send_recv_cmds[ATA_LOG_NCQ_SEND_RECV_DSM_OFFSET] &
1615 ATA_LOG_NCQ_SEND_RECV_DSM_TRIM);
1616}
1617
1da177e4
LT		 1618static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
1619{
1620 qc->tf.ctl |= ATA_NIEN;
1621}
1622
f69499f4
TH		 1623static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap,
1624 unsigned int tag)
1da177e4
LT		 1625{
1626 if (likely(ata_tag_valid(tag)))
1627 return &ap->qcmd[tag];
1628 return NULL;
1629}
1630
f69499f4
TH		 1631static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap,
1632 unsigned int tag)
1633{
1634 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
1635
1636 if (unlikely(!qc) || !ap->ops->error_handler)
1637 return qc;
1638
1639 if ((qc->flags & (ATA_QCFLAG_ACTIVE |
1640 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE)
1641 return qc;
1642
1643 return NULL;
1644}
1645
aacda375
TH		 1646static inline unsigned int ata_qc_raw_nbytes(struct ata_queued_cmd *qc)
1647{
1648 return qc->nbytes - min(qc->extrabytes, qc->nbytes);
1649}
1650
3373efd8 1651static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
1da177e4
LT		 1652{
1653 memset(tf, 0, sizeof(*tf));
1654
5fe7454a 1655#ifdef CONFIG_ATA_SFF
9af5c9c9 1656 tf->ctl = dev->link->ap->ctl;
5fe7454a
TH		 1657#else
1658 tf->ctl = ATA_DEVCTL_OBS;
1659#endif
3373efd8 1660 if (dev->devno == 0)
1da177e4
LT		 1661 tf->device = ATA_DEVICE_OBS;
1662 else
1663 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
1664}
1665
2c13b7ce
JG		 1666static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
1667{
501e0c50 1668 qc->dma_dir = DMA_NONE;
ff2aeb1e 1669 qc->sg = NULL;
2c13b7ce 1670 qc->flags = 0;
87260216
JA		 1671 qc->cursg = NULL;
1672 qc->cursg_ofs = 0;
aacda375 1673 qc->nbytes = qc->extrabytes = qc->curbytes = 0;
7a801184 1674 qc->n_elem = 0;
a22e2eb0 1675 qc->err_mask = 0;
5a5dbd18 1676 qc->sect_size = ATA_SECT_SIZE;
2c13b7ce 1677
3373efd8 1678 ata_tf_init(qc->dev, &qc->tf);
e61e0672
TH		 1679
1680 /* init result_tf such that it indicates normal completion */
1681 qc->result_tf.command = ATA_DRDY;
1682 qc->result_tf.feature = 0;
2c13b7ce
JG		 1683}
1684
057ace5e 1685static inline int ata_try_flush_cache(const struct ata_device *dev)
1da177e4
LT		 1686{
1687 return ata_id_wcache_enabled(dev->id) ||
1688 ata_id_has_flush(dev->id) ||
1689 ata_id_has_flush_ext(dev->id);
1690}
1691
a7dac447
JG		 1692static inline unsigned int ac_err_mask(u8 status)
1693{
3655d1d3 1694 if (status & (ATA_BUSY | ATA_DRQ))
11a56d24 1695 return AC_ERR_HSM;
a7dac447
JG		 1696 if (status & (ATA_ERR | ATA_DF))
1697 return AC_ERR_DEV;
1698 return 0;
1699}
1700
1701static inline unsigned int __ac_err_mask(u8 status)
1702{
1703 unsigned int mask = ac_err_mask(status);
1704 if (mask == 0)
1705 return AC_ERR_OTHER;
1706 return mask;
1707}
1708
35bb94b1
JG		 1709static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
1710{
4911487a 1711 return *(struct ata_port **)&host->hostdata[0];
35bb94b1
JG		 1712}
1713
78ab88f0
TH		 1714static inline int ata_check_ready(u8 status)
1715{
005b1f74
JG		 1716 if (!(status & ATA_BUSY))
1717 return 1;
78ab88f0
TH		 1718
1719 /* 0xff indicates either no device or device not ready */
1720 if (status == 0xff)
1721 return -ENODEV;
1722
005b1f74 1723 return 0;
78ab88f0
TH		 1724}
1725
341c2c95
TH		 1726static inline unsigned long ata_deadline(unsigned long from_jiffies,
1727 unsigned long timeout_msecs)
1728{
1729 return from_jiffies + msecs_to_jiffies(timeout_msecs);
1730}
1731
b15b3eba
AC		 1732/* Don't open code these in drivers as there are traps. Firstly the range may
1733 change in future hardware and specs, secondly 0xFF means 'no DMA' but is
1734 > UDMA_0. Dyma ddreigiau */
1735
1736static inline int ata_using_mwdma(struct ata_device *adev)
1737{
1738 if (adev->dma_mode >= XFER_MW_DMA_0 && adev->dma_mode <= XFER_MW_DMA_4)
1739 return 1;
1740 return 0;
1741}
1742
1743static inline int ata_using_udma(struct ata_device *adev)
1744{
1745 if (adev->dma_mode >= XFER_UDMA_0 && adev->dma_mode <= XFER_UDMA_7)
1746 return 1;
1747 return 0;
1748}
1749
1750static inline int ata_dma_enabled(struct ata_device *adev)
1751{
1752 return (adev->dma_mode == 0xFF ? 0 : 1);
1753}
48515f6c
TH		 1754
1755/**************************************************************************
1756 * PMP - drivers/ata/libata-pmp.c
1757 */
88fcd562
TH		 1758#ifdef CONFIG_SATA_PMP
1759
48515f6c
TH		 1760extern const struct ata_port_operations sata_pmp_port_ops;
1761
1762extern int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc);
1763extern void sata_pmp_error_handler(struct ata_port *ap);
1764
88fcd562
TH		 1765#else /* CONFIG_SATA_PMP */
1766
1767#define sata_pmp_port_ops sata_port_ops
1768#define sata_pmp_qc_defer_cmd_switch ata_std_qc_defer
1769#define sata_pmp_error_handler ata_std_error_handler
1770
1771#endif /* CONFIG_SATA_PMP */
1772
48515f6c 1773
624d5c51
TH		 1774/**************************************************************************
1775 * SFF - drivers/ata/libata-sff.c
1776 */
127102ae
TH		 1777#ifdef CONFIG_ATA_SFF
1778
624d5c51 1779extern const struct ata_port_operations ata_sff_port_ops;
871af121 1780extern const struct ata_port_operations ata_bmdma32_port_ops;
624d5c51
TH		 1781
1782/* PIO only, sg_tablesize and dma_boundary limits can be removed */
1783#define ATA_PIO_SHT(drv_name) \
1784 ATA_BASE_SHT(drv_name), \
1785 .sg_tablesize = LIBATA_MAX_PRD, \
1786 .dma_boundary = ATA_DMA_BOUNDARY
1787
9363c382
TH		 1788extern void ata_sff_dev_select(struct ata_port *ap, unsigned int device);
1789extern u8 ata_sff_check_status(struct ata_port *ap);
a57c1bad
AC		 1790extern void ata_sff_pause(struct ata_port *ap);
1791extern void ata_sff_dma_pause(struct ata_port *ap);
9363c382
TH		 1792extern int ata_sff_busy_sleep(struct ata_port *ap,
1793 unsigned long timeout_pat, unsigned long timeout);
705e76be 1794extern int ata_sff_wait_ready(struct ata_link *link, unsigned long deadline);
9363c382
TH		 1795extern void ata_sff_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
1796extern void ata_sff_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
1797extern void ata_sff_exec_command(struct ata_port *ap,
1798 const struct ata_taskfile *tf);
1799extern unsigned int ata_sff_data_xfer(struct ata_device *dev,
624d5c51 1800 unsigned char *buf, unsigned int buflen, int rw);
871af121
AC		 1801extern unsigned int ata_sff_data_xfer32(struct ata_device *dev,
1802 unsigned char *buf, unsigned int buflen, int rw);
9363c382 1803extern unsigned int ata_sff_data_xfer_noirq(struct ata_device *dev,
624d5c51 1804 unsigned char *buf, unsigned int buflen, int rw);
e42a542b 1805extern void ata_sff_irq_on(struct ata_port *ap);
9363c382
TH		 1806extern void ata_sff_irq_clear(struct ata_port *ap);
1807extern int ata_sff_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
1808 u8 status, int in_wq);
64b97594
VK		 1809extern void ata_sff_queue_work(struct work_struct *work);
1810extern void ata_sff_queue_delayed_work(struct delayed_work *dwork,
1811 unsigned long delay);
ea3c6450 1812extern void ata_sff_queue_pio_task(struct ata_link *link, unsigned long delay);
9363c382 1813extern unsigned int ata_sff_qc_issue(struct ata_queued_cmd *qc);
22183bf5 1814extern bool ata_sff_qc_fill_rtf(struct ata_queued_cmd *qc);
c3b28894 1815extern unsigned int ata_sff_port_intr(struct ata_port *ap,
9363c382
TH		 1816 struct ata_queued_cmd *qc);
1817extern irqreturn_t ata_sff_interrupt(int irq, void *dev_instance);
c96f1732 1818extern void ata_sff_lost_interrupt(struct ata_port *ap);
9363c382
TH		 1819extern void ata_sff_freeze(struct ata_port *ap);
1820extern void ata_sff_thaw(struct ata_port *ap);
1821extern int ata_sff_prereset(struct ata_link *link, unsigned long deadline);
1822extern unsigned int ata_sff_dev_classify(struct ata_device *dev, int present,
1823 u8 *r_err);
705e76be
TH		 1824extern int ata_sff_wait_after_reset(struct ata_link *link, unsigned int devmask,
1825 unsigned long deadline);
9363c382 1826extern int ata_sff_softreset(struct ata_link *link, unsigned int *classes,
624d5c51 1827 unsigned long deadline);
9363c382
TH		 1828extern int sata_sff_hardreset(struct ata_link *link, unsigned int *class,
1829 unsigned long deadline);
1830extern void ata_sff_postreset(struct ata_link *link, unsigned int *classes);
3d47aa8e 1831extern void ata_sff_drain_fifo(struct ata_queued_cmd *qc);
9363c382 1832extern void ata_sff_error_handler(struct ata_port *ap);
9363c382 1833extern void ata_sff_std_ports(struct ata_ioports *ioaddr);
624d5c51 1834#ifdef CONFIG_PCI
9363c382
TH		 1835extern int ata_pci_sff_init_host(struct ata_host *host);
1836extern int ata_pci_sff_prepare_host(struct pci_dev *pdev,
624d5c51
TH		 1837 const struct ata_port_info * const * ppi,
1838 struct ata_host **r_host);
9363c382 1839extern int ata_pci_sff_activate_host(struct ata_host *host,
624d5c51
TH		 1840 irq_handler_t irq_handler,
1841 struct scsi_host_template *sht);
9363c382 1842extern int ata_pci_sff_init_one(struct pci_dev *pdev,
16ea0fc9
AC		 1843 const struct ata_port_info * const * ppi,
1844 struct scsi_host_template *sht, void *host_priv, int hflags);
624d5c51
TH		 1845#endif /* CONFIG_PCI */
1846
9a7780c9
TH		 1847#ifdef CONFIG_ATA_BMDMA
1848
1849extern const struct ata_port_operations ata_bmdma_port_ops;
1850
1851#define ATA_BMDMA_SHT(drv_name) \
1852 ATA_BASE_SHT(drv_name), \
1853 .sg_tablesize = LIBATA_MAX_PRD, \
1854 .dma_boundary = ATA_DMA_BOUNDARY
1855
f47451c4 1856extern void ata_bmdma_qc_prep(struct ata_queued_cmd *qc);
360ff783 1857extern unsigned int ata_bmdma_qc_issue(struct ata_queued_cmd *qc);
f47451c4 1858extern void ata_bmdma_dumb_qc_prep(struct ata_queued_cmd *qc);
c3b28894
TH		 1859extern unsigned int ata_bmdma_port_intr(struct ata_port *ap,
1860 struct ata_queued_cmd *qc);
1861extern irqreturn_t ata_bmdma_interrupt(int irq, void *dev_instance);
fe06e5f9
TH		 1862extern void ata_bmdma_error_handler(struct ata_port *ap);
1863extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc);
37f65b8b 1864extern void ata_bmdma_irq_clear(struct ata_port *ap);
9f2f7210
TH		 1865extern void ata_bmdma_setup(struct ata_queued_cmd *qc);
1866extern void ata_bmdma_start(struct ata_queued_cmd *qc);
1867extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
1868extern u8 ata_bmdma_status(struct ata_port *ap);
c7087652
TH		 1869extern int ata_bmdma_port_start(struct ata_port *ap);
1870extern int ata_bmdma_port_start32(struct ata_port *ap);
9f2f7210
TH		 1871
1872#ifdef CONFIG_PCI
1873extern int ata_pci_bmdma_clear_simplex(struct pci_dev *pdev);
c7087652 1874extern void ata_pci_bmdma_init(struct ata_host *host);
1c5afdf7
TH		 1875extern int ata_pci_bmdma_prepare_host(struct pci_dev *pdev,
1876 const struct ata_port_info * const * ppi,
1877 struct ata_host **r_host);
1878extern int ata_pci_bmdma_init_one(struct pci_dev *pdev,
1879 const struct ata_port_info * const * ppi,
1880 struct scsi_host_template *sht,
1881 void *host_priv, int hflags);
9f2f7210 1882#endif /* CONFIG_PCI */
9a7780c9 1883#endif /* CONFIG_ATA_BMDMA */
9f2f7210 1884
624d5c51 1885/**
9363c382 1886 * ata_sff_busy_wait - Wait for a port status register
624d5c51
TH		 1887 * @ap: Port to wait for.
1888 * @bits: bits that must be clear
1889 * @max: number of 10uS waits to perform
1890 *
1891 * Waits up to max*10 microseconds for the selected bits in the port's
1892 * status register to be cleared.
1893 * Returns final value of status register.
1894 *
1895 * LOCKING:
1896 * Inherited from caller.
1897 */
9363c382
TH		 1898static inline u8 ata_sff_busy_wait(struct ata_port *ap, unsigned int bits,
1899 unsigned int max)
624d5c51
TH		 1900{
1901 u8 status;
1902
1903 do {
1904 udelay(10);
5682ed33 1905 status = ap->ops->sff_check_status(ap);
624d5c51
TH		 1906 max--;
1907 } while (status != 0xff && (status & bits) && (max > 0));
1908
1909 return status;
1910}
1911
1912/**
1913 * ata_wait_idle - Wait for a port to be idle.
1914 * @ap: Port to wait for.
1915 *
1916 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
1917 * Returns final value of status register.
1918 *
1919 * LOCKING:
1920 * Inherited from caller.
1921 */
1922static inline u8 ata_wait_idle(struct ata_port *ap)
1923{
9363c382 1924 u8 status = ata_sff_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
624d5c51
TH		 1925
1926#ifdef ATA_DEBUG
1927 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ)))
1928 ata_port_printk(ap, KERN_DEBUG, "abnormal Status 0x%X\n",
1929 status);
1930#endif
1931
1932 return status;
1933}
127102ae 1934#endif /* CONFIG_ATA_SFF */
624d5c51 1935
1da177e4 1936#endif /* __LINUX_LIBATA_H__ */
Linux kernel - Deliverables
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