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libata-sff: port_task is SFF specific
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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 */
054a5fba 146 ATA_DFLAG_SLEEPING = (1 << 15), /* device is sleeping */
00115e0f 147 ATA_DFLAG_DUBIOUS_XFER = (1 << 16), /* data transfer not verified */
45fabbb7 148 ATA_DFLAG_NO_UNLOAD = (1 << 17), /* device doesn't support unload */
445d211b 149 ATA_DFLAG_UNLOCK_HPA = (1 << 18), /* unlock HPA */
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),
388539f3 193 ATA_FLAG_FPDMA_AA = (1 << 14), /* driver supports Auto-Activate */
b2a8bbe6 194 ATA_FLAG_IGN_SIMPLEX = (1 << 15), /* ignore SIMPLEX */
f834e49f 195 ATA_FLAG_NO_IORDY = (1 << 16), /* controller lacks iordy */
3cadbcc0 196 ATA_FLAG_ACPI_SATA = (1 << 17), /* need native SATA ACPI layout */
9f45cbd3 197 ATA_FLAG_AN = (1 << 18), /* controller supports AN */
e0a71752 198 ATA_FLAG_PMP = (1 << 19), /* controller supports PMP */
ca77329f 199 ATA_FLAG_IPM = (1 << 20), /* driver can handle IPM */
18f7ba4c
KCA		 200 ATA_FLAG_EM = (1 << 21), /* driver supports enclosure
201 * management */
202 ATA_FLAG_SW_ACTIVITY = (1 << 22), /* driver supports sw activity
203 * led */
949b38af 204
b51e9e5d 205 /* bits 24:31 of ap->flags are reserved for LLD specific flags */
9ec957f2 206
e3cf95dd 207
b51e9e5d
TH		 208 /* struct ata_port pflags */
209 ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */
210 ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */
211 ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */
212 ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */
213 ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */
b51e9e5d 214 ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */
f4d6d004 215 ATA_PFLAG_INITIALIZING = (1 << 7), /* being initialized, don't touch */
afaa5c37 216 ATA_PFLAG_RESETTING = (1 << 8), /* reset in progress */
ece180d1
TH		 217 ATA_PFLAG_UNLOADING = (1 << 9), /* driver is being unloaded */
218 ATA_PFLAG_UNLOADED = (1 << 10), /* driver is unloaded */
949b38af 219
b51e9e5d 220 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */
500530f6 221 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */
c05e6ff0 222 ATA_PFLAG_INIT_GTM_VALID = (1 << 19), /* initial gtm data valid */
949b38af 223
e3cf95dd
AC		 224 ATA_PFLAG_PIO32 = (1 << 20), /* 32bit PIO */
225 ATA_PFLAG_PIO32CHANGE = (1 << 21), /* 32bit PIO can be turned on/off */
226
949b38af
TH		 227 /* struct ata_queued_cmd flags */
228 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */
001102d7 229 ATA_QCFLAG_DMAMAP = (1 << 1), /* SG table is DMA mapped */
27197367 230 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */
e61e0672 231 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */
da917d69 232 ATA_QCFLAG_CLEAR_EXCL = (1 << 5), /* clear excl_link on completion */
e027bd36 233 ATA_QCFLAG_QUIET = (1 << 6), /* don't report device error */
03faab78 234 ATA_QCFLAG_RETRY = (1 << 7), /* retry after failure */
e61e0672 235
9ec957f2
TH		 236 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */
237 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */
238 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */
1da177e4 239
4e5ec5db 240 /* host set flags */
cca3974e 241 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */
ecef7253 242 ATA_HOST_STARTED = (1 << 1), /* Host started */
886ad09f 243 ATA_HOST_PARALLEL_SCAN = (1 << 2), /* Ports on this host can be scanned in parallel */
9bec2e38 244
b8b275ef
TH		 245 /* bits 24:31 of host->flags are reserved for LLD specific flags */
246
1da177e4 247 /* various lengths of time */
341c2c95
TH		 248 ATA_TMOUT_BOOT = 30000, /* heuristic */
249 ATA_TMOUT_BOOT_QUICK = 7000, /* heuristic */
341c2c95 250 ATA_TMOUT_INTERNAL_QUICK = 5000,
45fabbb7 251 ATA_TMOUT_MAX_PARK = 30000,
1da177e4 252
b48d58f5
TH		 253 /*
254 * GoVault needs 2s and iVDR disk HHD424020F7SV00 800ms. 2s
255 * is too much without parallel probing. Use 2s if parallel
256 * probing is available, 800ms otherwise.
88ff6eaf 257 */
b48d58f5
TH		 258 ATA_TMOUT_FF_WAIT_LONG = 2000,
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 */
e7d3ef13 278 ATA_TMOUT_PMP_SRST_WAIT = 5000,
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
5040ab67
TH		 353 /* sometimes resuming a link requires several retries */
354 ATA_LINK_RESUME_TRIES = 5,
355
14d2bac1
TH		 356 /* how hard are we gonna try to probe/recover devices */
357 ATA_PROBE_MAX_TRIES = 3,
022bdb07 358 ATA_EH_DEV_TRIES = 3,
e0a71752
TH		 359 ATA_EH_PMP_TRIES = 5,
360 ATA_EH_PMP_LINK_TRIES = 3,
361
bf1bff6f 362 SATA_PMP_RW_TIMEOUT = 3000, /* PMP read/write timeout */
f5914a46 363
87fbc5a0
TH		 364 /* This should match the actual table size of
365 * ata_eh_cmd_timeout_table in libata-eh.c.
366 */
6013efd8 367 ATA_EH_CMD_TIMEOUT_TABLE_SIZE = 6,
87fbc5a0 368
93590859
AC		 369 /* Horkage types. May be set by libata or controller on drives
370 (some horkage may be drive/controller pair dependant */
371
372 ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */
6919a0a6
AC		 373 ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */
374 ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */
18d6e9d5 375 ATA_HORKAGE_MAX_SEC_128 = (1 << 3), /* Limit max sects to 128 */
16c55b03 376 ATA_HORKAGE_BROKEN_HPA = (1 << 4), /* Broken HPA */
50af2fa1 377 ATA_HORKAGE_DISABLE = (1 << 5), /* Disable it */
93328e11 378 ATA_HORKAGE_HPA_SIZE = (1 << 6), /* native size off by one */
ca77329f 379 ATA_HORKAGE_IPM = (1 << 7), /* Link PM problems */
6bbfd53d 380 ATA_HORKAGE_IVB = (1 << 8), /* cbl det validity bit bugs */
2d3b8eea 381 ATA_HORKAGE_STUCK_ERR = (1 << 9), /* stuck ERR on next PACKET */
9ce8e307 382 ATA_HORKAGE_BRIDGE_OK = (1 << 10), /* no bridge limits */
6a87e42e
TH		 383 ATA_HORKAGE_ATAPI_MOD16_DMA = (1 << 11), /* use ATAPI DMA for commands
384 not multiple of 16 bytes */
877d0310 385 ATA_HORKAGE_FIRMWARE_WARN = (1 << 12), /* firmware update warning */
9062712f 386 ATA_HORKAGE_1_5_GBPS = (1 << 13), /* force 1.5 Gbps */
d0cb43b3 387 ATA_HORKAGE_NOSETXFER = (1 << 14), /* skip SETXFER, SATA only */
388539f3 388 ATA_HORKAGE_BROKEN_FPDMA_AA = (1 << 15), /* skip AA */
b3a70601 389
2dcb407e 390 /* DMA mask for user DMA control: User visible values; DO NOT
b3a70601
AC		 391 renumber */
392 ATA_DMA_MASK_ATA = (1 << 0), /* DMA on ATA Disk */
393 ATA_DMA_MASK_ATAPI = (1 << 1), /* DMA on ATAPI */
394 ATA_DMA_MASK_CFA = (1 << 2), /* DMA on CF Card */
ceb0c642
TH		 395
396 /* ATAPI command types */
397 ATAPI_READ = 0, /* READs */
398 ATAPI_WRITE = 1, /* WRITEs */
399 ATAPI_READ_CD = 2, /* READ CD [MSF] */
e52dcc48
TH		 400 ATAPI_PASS_THRU = 3, /* SAT pass-thru */
401 ATAPI_MISC = 4, /* the rest */
624d5c51
TH		 402
403 /* Timing constants */
404 ATA_TIMING_SETUP = (1 << 0),
405 ATA_TIMING_ACT8B = (1 << 1),
406 ATA_TIMING_REC8B = (1 << 2),
407 ATA_TIMING_CYC8B = (1 << 3),
408 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
409 ATA_TIMING_CYC8B,
410 ATA_TIMING_ACTIVE = (1 << 4),
411 ATA_TIMING_RECOVER = (1 << 5),
3ada9c12
DD		 412 ATA_TIMING_DMACK_HOLD = (1 << 6),
413 ATA_TIMING_CYCLE = (1 << 7),
414 ATA_TIMING_UDMA = (1 << 8),
624d5c51
TH		 415 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
416 ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
417 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
3ada9c12
DD		 418 ATA_TIMING_DMACK_HOLD | ATA_TIMING_CYCLE |
419 ATA_TIMING_UDMA,
f1bce7f8
TH		 420
421 /* ACPI constants */
422 ATA_ACPI_FILTER_SETXFER = 1 << 0,
423 ATA_ACPI_FILTER_LOCK = 1 << 1,
424 ATA_ACPI_FILTER_DIPM = 1 << 2,
fa5b561c
TH		 425 ATA_ACPI_FILTER_FPDMA_OFFSET = 1 << 3, /* FPDMA non-zero offset */
426 ATA_ACPI_FILTER_FPDMA_AA = 1 << 4, /* FPDMA auto activate */
f1bce7f8
TH		 427
428 ATA_ACPI_FILTER_DEFAULT = ATA_ACPI_FILTER_SETXFER |
429 ATA_ACPI_FILTER_LOCK |
430 ATA_ACPI_FILTER_DIPM,
1da177e4
LT		 431};
432
7dc951ae
TH		 433enum ata_xfer_mask {
434 ATA_MASK_PIO = ((1LU << ATA_NR_PIO_MODES) - 1)
435 << ATA_SHIFT_PIO,
436 ATA_MASK_MWDMA = ((1LU << ATA_NR_MWDMA_MODES) - 1)
437 << ATA_SHIFT_MWDMA,
438 ATA_MASK_UDMA = ((1LU << ATA_NR_UDMA_MODES) - 1)
439 << ATA_SHIFT_UDMA,
440};
441
14be71f4 442enum hsm_task_states {
c56b14d2 443 HSM_ST_IDLE, /* no command on going */
71527647
AL		 444 HSM_ST_FIRST, /* (waiting the device to)
445 write CDB or first data block */
c56b14d2
AL		 446 HSM_ST, /* (waiting the device to) transfer data */
447 HSM_ST_LAST, /* (waiting the device to) complete command */
c56b14d2 448 HSM_ST_ERR, /* error */
1da177e4
LT		 449};
450
a7dac447 451enum ata_completion_errors {
11a56d24
TH		 452 AC_ERR_DEV = (1 << 0), /* device reported error */
453 AC_ERR_HSM = (1 << 1), /* host state machine violation */
454 AC_ERR_TIMEOUT = (1 << 2), /* timeout */
455 AC_ERR_MEDIA = (1 << 3), /* media error */
456 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */
457 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */
458 AC_ERR_SYSTEM = (1 << 6), /* system error */
459 AC_ERR_INVALID = (1 << 7), /* invalid argument */
460 AC_ERR_OTHER = (1 << 8), /* unknown */
55a8e2c8 461 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */
5335b729 462 AC_ERR_NCQ = (1 << 10), /* marker for offending NCQ qc */
a7dac447
JG		 463};
464
1da177e4
LT		 465/* forward declarations */
466struct scsi_device;
467struct ata_port_operations;
468struct ata_port;
cc0680a5 469struct ata_link;
1da177e4
LT		 470struct ata_queued_cmd;
471
472/* typedefs */
77853bf2 473typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
cc0680a5
TH		 474typedef int (*ata_prereset_fn_t)(struct ata_link *link, unsigned long deadline);
475typedef int (*ata_reset_fn_t)(struct ata_link *link, unsigned int *classes,
d4b2bab4 476 unsigned long deadline);
cc0680a5 477typedef void (*ata_postreset_fn_t)(struct ata_link *link, unsigned int *classes);
1da177e4 478
ca77329f
KCA		 479/*
480 * host pm policy: If you alter this, you also need to alter libata-scsi.c
481 * (for the ascii descriptions)
482 */
483enum link_pm {
484 NOT_AVAILABLE,
485 MIN_POWER,
486 MAX_PERFORMANCE,
487 MEDIUM_POWER,
488};
ee959b00 489extern struct device_attribute dev_attr_link_power_management_policy;
45fabbb7 490extern struct device_attribute dev_attr_unload_heads;
18f7ba4c
KCA		 491extern struct device_attribute dev_attr_em_message_type;
492extern struct device_attribute dev_attr_em_message;
493extern struct device_attribute dev_attr_sw_activity;
494
495enum sw_activity {
496 OFF,
497 BLINK_ON,
498 BLINK_OFF,
499};
ca77329f 500
127102ae 501#ifdef CONFIG_ATA_SFF
1da177e4 502struct ata_ioports {
0d5ff566
TH		 503 void __iomem *cmd_addr;
504 void __iomem *data_addr;
505 void __iomem *error_addr;
506 void __iomem *feature_addr;
507 void __iomem *nsect_addr;
508 void __iomem *lbal_addr;
509 void __iomem *lbam_addr;
510 void __iomem *lbah_addr;
511 void __iomem *device_addr;
512 void __iomem *status_addr;
513 void __iomem *command_addr;
514 void __iomem *altstatus_addr;
515 void __iomem *ctl_addr;
516 void __iomem *bmdma_addr;
517 void __iomem *scr_addr;
1da177e4 518};
127102ae 519#endif /* CONFIG_ATA_SFF */
1da177e4 520
cca3974e 521struct ata_host {
1da177e4
LT		 522 spinlock_t lock;
523 struct device *dev;
0d5ff566 524 void __iomem * const *iomap;
1da177e4
LT		 525 unsigned int n_ports;
526 void *private_data;
029cfd6b 527 struct ata_port_operations *ops;
5444a6f4 528 unsigned long flags;
fafbae87
TH		 529#ifdef CONFIG_ATA_ACPI
530 acpi_handle acpi_handle;
531#endif
032af1ce 532 struct ata_port *simplex_claimed; /* channel owning the DMA */
f0eb62b8 533 struct ata_port *ports[0];
1da177e4
LT		 534};
535
536struct ata_queued_cmd {
537 struct ata_port *ap;
538 struct ata_device *dev;
539
540 struct scsi_cmnd *scsicmd;
541 void (*scsidone)(struct scsi_cmnd *);
542
543 struct ata_taskfile tf;
544 u8 cdb[ATAPI_CDB_LEN];
545
546 unsigned long flags; /* ATA_QCFLAG_xxx */
547 unsigned int tag;
548 unsigned int n_elem;
5825627c 549 unsigned int orig_n_elem;
1da177e4
LT		 550
551 int dma_dir;
552
5a5dbd18 553 unsigned int sect_size;
cedc9a47 554
1da177e4 555 unsigned int nbytes;
aacda375 556 unsigned int extrabytes;
1da177e4
LT		 557 unsigned int curbytes;
558
87260216 559 struct scatterlist *cursg;
1da177e4
LT		 560 unsigned int cursg_ofs;
561
562 struct scatterlist sgent;
1da177e4 563
ff2aeb1e 564 struct scatterlist *sg;
1da177e4 565
a22e2eb0 566 unsigned int err_mask;
e61e0672 567 struct ata_taskfile result_tf;
1da177e4
LT		 568 ata_qc_cb_t complete_fn;
569
1da177e4 570 void *private_data;
1c50dc83 571 void *lldd_task;
1da177e4
LT		 572};
573
cca3974e 574struct ata_port_stats {
1da177e4
LT		 575 unsigned long unhandled_irq;
576 unsigned long idle_irq;
577 unsigned long rw_reqbuf;
578};
579
0c247c55 580struct ata_ering_entry {
3884f7b0 581 unsigned int eflags;
0c247c55
TH		 582 unsigned int err_mask;
583 u64 timestamp;
584};
585
586struct ata_ering {
587 int cursor;
588 struct ata_ering_entry ring[ATA_ERING_SIZE];
589};
590
1da177e4 591struct ata_device {
9af5c9c9 592 struct ata_link *link;
72fa4b74 593 unsigned int devno; /* 0 or 1 */
75683fe7 594 unsigned int horkage; /* List of broken features */
6866e7bc 595 unsigned long flags; /* ATA_DFLAG_xxx */
3edebac4 596 struct scsi_device *sdev; /* attached SCSI device */
95514fd8 597 void *private_data;
fafbae87
TH		 598#ifdef CONFIG_ATA_ACPI
599 acpi_handle acpi_handle;
398e0782 600 union acpi_object *gtf_cache;
110f66d2 601 unsigned int gtf_filter;
fafbae87 602#endif
99cf610a 603 /* n_sector is CLEAR_BEGIN, read comment above CLEAR_BEGIN */
72fa4b74 604 u64 n_sectors; /* size of device, if ATA */
5920dadf 605 u64 n_native_sectors; /* native size, if ATA */
1da177e4 606 unsigned int class; /* ATA_DEV_xxx */
45fabbb7 607 unsigned long unpark_deadline;
e0a71752 608
1da177e4
LT		 609 u8 pio_mode;
610 u8 dma_mode;
611 u8 xfer_mode;
612 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
613
8cbd6df1
AL		 614 unsigned int multi_count; /* sectors count for
615 READ/WRITE MULTIPLE */
b00eec1d 616 unsigned int max_sectors; /* per-device max sectors */
6e7846e9 617 unsigned int cdb_len;
8bf62ece 618
acf356b1 619 /* per-dev xfer mask */
7dc951ae
TH		 620 unsigned long pio_mask;
621 unsigned long mwdma_mask;
622 unsigned long udma_mask;
acf356b1 623
8bf62ece
AL		 624 /* for CHS addressing */
625 u16 cylinders; /* Number of cylinders */
626 u16 heads; /* Number of heads */
627 u16 sectors; /* Number of sectors per track */
0c247c55 628
f7e98930
JG		 629 union {
630 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
631 u32 gscr[SATA_PMP_GSCR_DWORDS]; /* PMP GSCR block */
632 };
99cf610a
TH		 633
634 /* error history */
635 int spdn_cnt;
636 /* ering is CLEAR_END, read comment above CLEAR_END */
637 struct ata_ering ering;
1da177e4
LT		 638};
639
99cf610a
TH		 640/* Fields between ATA_DEVICE_CLEAR_BEGIN and ATA_DEVICE_CLEAR_END are
641 * cleared to zero on ata_dev_init().
72fa4b74 642 */
99cf610a
TH		 643#define ATA_DEVICE_CLEAR_BEGIN offsetof(struct ata_device, n_sectors)
644#define ATA_DEVICE_CLEAR_END offsetof(struct ata_device, ering)
72fa4b74 645
f3e81b19
TH		 646struct ata_eh_info {
647 struct ata_device *dev; /* offending device */
648 u32 serror; /* SError from LLDD */
649 unsigned int err_mask; /* port-wide err_mask */
650 unsigned int action; /* ATA_EH_* action mask */
47005f25 651 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */
f3e81b19 652 unsigned int flags; /* ATA_EHI_* flags */
abdda733 653
abdda733
TH		 654 unsigned int probe_mask;
655
f3e81b19
TH		 656 char desc[ATA_EH_DESC_LEN];
657 int desc_len;
658};
659
660struct ata_eh_context {
661 struct ata_eh_info i;
662 int tries[ATA_MAX_DEVICES];
87fbc5a0
TH		 663 int cmd_timeout_idx[ATA_MAX_DEVICES]
664 [ATA_EH_CMD_TIMEOUT_TABLE_SIZE];
abdda733
TH		 665 unsigned int classes[ATA_MAX_DEVICES];
666 unsigned int did_probe_mask;
45fabbb7 667 unsigned int unloaded_mask;
00115e0f
TH		 668 unsigned int saved_ncq_enabled;
669 u8 saved_xfer_mode[ATA_MAX_DEVICES];
0a2c0f56
TH		 670 /* timestamp for the last reset attempt or success */
671 unsigned long last_reset;
f3e81b19
TH		 672};
673
64578a3d
TH		 674struct ata_acpi_drive
675{
676 u32 pio;
677 u32 dma;
678} __packed;
679
680struct ata_acpi_gtm {
681 struct ata_acpi_drive drive[2];
682 u32 flags;
683} __packed;
684
9af5c9c9
TH		 685struct ata_link {
686 struct ata_port *ap;
8989805d 687 int pmp; /* port multiplier port # */
9af5c9c9
TH		 688
689 unsigned int active_tag; /* active tag on this link */
690 u32 sactive; /* active NCQ commands */
691
0c88758b
TH		 692 unsigned int flags; /* ATA_LFLAG_xxx */
693
d127ea7b 694 u32 saved_scontrol; /* SControl on probe */
9af5c9c9
TH		 695 unsigned int hw_sata_spd_limit;
696 unsigned int sata_spd_limit;
697 unsigned int sata_spd; /* current SATA PHY speed */
698
699 /* record runtime error info, protected by host_set lock */
700 struct ata_eh_info eh_info;
701 /* EH context */
702 struct ata_eh_context eh_context;
703
704 struct ata_device device[ATA_MAX_DEVICES];
705};
706
1da177e4 707struct ata_port {
cca3974e 708 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */
029cfd6b 709 struct ata_port_operations *ops;
ba6a1308 710 spinlock_t *lock;
e3cf95dd
AC		 711 /* Flags owned by the EH context. Only EH should touch these once the
712 port is active */
1da177e4 713 unsigned long flags; /* ATA_FLAG_xxx */
e3cf95dd 714 /* Flags that change dynamically, protected by ap->lock */
b51e9e5d 715 unsigned int pflags; /* ATA_PFLAG_xxx */
44877b4e
TH		 716 unsigned int print_id; /* user visible unique port ID */
717 unsigned int port_no; /* 0 based port no. inside the host */
1da177e4
LT		 718
719 struct ata_prd *prd; /* our SG list */
720 dma_addr_t prd_dma; /* and its DMA mapping */
721
127102ae 722#ifdef CONFIG_ATA_SFF
1da177e4 723 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
1da177e4
LT		 724 u8 ctl; /* cache of ATA control register */
725 u8 last_ctl; /* Cache last written value */
c429137a 726 struct delayed_work sff_pio_task;
5fe7454a
TH		 727#endif /* CONFIG_ATA_SFF */
728
1da177e4
LT		 729 unsigned int pio_mask;
730 unsigned int mwdma_mask;
731 unsigned int udma_mask;
732 unsigned int cbl; /* cable type; ATA_CBL_xxx */
1da177e4
LT		 733
734 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
8a8bc223 735 unsigned long qc_allocated;
dedaf2b0 736 unsigned int qc_active;
da917d69 737 int nr_active_links; /* #links with active qcs */
dedaf2b0 738
b1c72916
TH		 739 struct ata_link link; /* host default link */
740 struct ata_link *slave_link; /* see ata_slave_link_init() */
1da177e4 741
8989805d
TH		 742 int nr_pmp_links; /* nr of available PMP links */
743 struct ata_link *pmp_link; /* array of PMP links */
da917d69 744 struct ata_link *excl_link; /* for PMP qc exclusion */
8989805d 745
cca3974e
JG		 746 struct ata_port_stats stats;
747 struct ata_host *host;
2f1f610b 748 struct device *dev;
1da177e4 749
52bad64d 750 struct delayed_work hotplug_task;
3b01b8af 751 struct work_struct scsi_rescan_task;
86e45b6b 752
14be71f4 753 unsigned int hsm_task_state;
1da177e4 754
bfd60579 755 u32 msg_enable;
a72ec4ce 756 struct list_head eh_done_q;
c6cf9e99 757 wait_queue_head_t eh_wait_q;
a1e10f7e 758 int eh_tries;
45fabbb7 759 struct completion park_req_pending;
bfd60579 760
500530f6
TH		 761 pm_message_t pm_mesg;
762 int *pm_result;
ca77329f 763 enum link_pm pm_policy;
500530f6 764
5ddf24c5
TH		 765 struct timer_list fastdrain_timer;
766 unsigned long fastdrain_cnt;
767
18f7ba4c 768 int em_message_type;
1da177e4 769 void *private_data;
fe635c7e 770
fafbae87
TH		 771#ifdef CONFIG_ATA_ACPI
772 acpi_handle acpi_handle;
c05e6ff0 773 struct ata_acpi_gtm __acpi_init_gtm; /* use ata_acpi_init_gtm() */
fafbae87 774#endif
84bda12a
TH		 775 /* owned by EH */
776 u8 sector_buf[ATA_SECT_SIZE] ____cacheline_aligned;
1da177e4
LT		 777};
778
029cfd6b
TH		 779/* The following initializer overrides a method to NULL whether one of
780 * its parent has the method defined or not. This is equivalent to
781 * ERR_PTR(-ENOENT). Unfortunately, ERR_PTR doesn't render a constant
782 * expression and thus can't be used as an initializer.
783 */
784#define ATA_OP_NULL (void *)(unsigned long)(-ENOENT)
785
1da177e4 786struct ata_port_operations {
c1bc899f
TH		 787 /*
788 * Command execution
789 */
790 int (*qc_defer)(struct ata_queued_cmd *qc);
791 int (*check_atapi_dma)(struct ata_queued_cmd *qc);
792 void (*qc_prep)(struct ata_queued_cmd *qc);
793 unsigned int (*qc_issue)(struct ata_queued_cmd *qc);
22183bf5 794 bool (*qc_fill_rtf)(struct ata_queued_cmd *qc);
1da177e4 795
c1bc899f
TH		 796 /*
797 * Configuration and exception handling
798 */
799 int (*cable_detect)(struct ata_port *ap);
800 unsigned long (*mode_filter)(struct ata_device *dev, unsigned long xfer_mask);
801 void (*set_piomode)(struct ata_port *ap, struct ata_device *dev);
802 void (*set_dmamode)(struct ata_port *ap, struct ata_device *dev);
803 int (*set_mode)(struct ata_link *link, struct ata_device **r_failed_dev);
963e4975 804 unsigned int (*read_id)(struct ata_device *dev, struct ata_taskfile *tf, u16 *id);
1da177e4 805
c1bc899f 806 void (*dev_config)(struct ata_device *dev);
1da177e4 807
c1bc899f
TH		 808 void (*freeze)(struct ata_port *ap);
809 void (*thaw)(struct ata_port *ap);
a1efdaba
TH		 810 ata_prereset_fn_t prereset;
811 ata_reset_fn_t softreset;
812 ata_reset_fn_t hardreset;
813 ata_postreset_fn_t postreset;
814 ata_prereset_fn_t pmp_prereset;
815 ata_reset_fn_t pmp_softreset;
816 ata_reset_fn_t pmp_hardreset;
817 ata_postreset_fn_t pmp_postreset;
c1bc899f 818 void (*error_handler)(struct ata_port *ap);
c96f1732 819 void (*lost_interrupt)(struct ata_port *ap);
c1bc899f
TH		 820 void (*post_internal_cmd)(struct ata_queued_cmd *qc);
821
822 /*
823 * Optional features
824 */
82ef04fb
TH		 825 int (*scr_read)(struct ata_link *link, unsigned int sc_reg, u32 *val);
826 int (*scr_write)(struct ata_link *link, unsigned int sc_reg, u32 val);
c1bc899f
TH		 827 void (*pmp_attach)(struct ata_port *ap);
828 void (*pmp_detach)(struct ata_port *ap);
829 int (*enable_pm)(struct ata_port *ap, enum link_pm policy);
830 void (*disable_pm)(struct ata_port *ap);
831
832 /*
833 * Start, stop, suspend and resume
834 */
835 int (*port_suspend)(struct ata_port *ap, pm_message_t mesg);
836 int (*port_resume)(struct ata_port *ap);
837 int (*port_start)(struct ata_port *ap);
838 void (*port_stop)(struct ata_port *ap);
839 void (*host_stop)(struct ata_host *host);
840
127102ae 841#ifdef CONFIG_ATA_SFF
c1bc899f
TH		 842 /*
843 * SFF / taskfile oriented ops
844 */
5682ed33 845 void (*sff_dev_select)(struct ata_port *ap, unsigned int device);
41dec29b 846 void (*sff_set_devctl)(struct ata_port *ap, u8 ctl);
5682ed33
TH		 847 u8 (*sff_check_status)(struct ata_port *ap);
848 u8 (*sff_check_altstatus)(struct ata_port *ap);
849 void (*sff_tf_load)(struct ata_port *ap, const struct ata_taskfile *tf);
850 void (*sff_tf_read)(struct ata_port *ap, struct ata_taskfile *tf);
851 void (*sff_exec_command)(struct ata_port *ap,
852 const struct ata_taskfile *tf);
853 unsigned int (*sff_data_xfer)(struct ata_device *dev,
854 unsigned char *buf, unsigned int buflen, int rw);
e42a542b 855 void (*sff_irq_on)(struct ata_port *);
27943620 856 bool (*sff_irq_check)(struct ata_port *);
5682ed33 857 void (*sff_irq_clear)(struct ata_port *);
8244cd05 858 void (*sff_drain_fifo)(struct ata_queued_cmd *qc);
5682ed33 859
c1bc899f
TH		 860 void (*bmdma_setup)(struct ata_queued_cmd *qc);
861 void (*bmdma_start)(struct ata_queued_cmd *qc);
862 void (*bmdma_stop)(struct ata_queued_cmd *qc);
863 u8 (*bmdma_status)(struct ata_port *ap);
127102ae 864#endif /* CONFIG_ATA_SFF */
c1bc899f 865
18f7ba4c
KCA		 866 ssize_t (*em_show)(struct ata_port *ap, char *buf);
867 ssize_t (*em_store)(struct ata_port *ap, const char *message,
868 size_t size);
869 ssize_t (*sw_activity_show)(struct ata_device *dev, char *buf);
870 ssize_t (*sw_activity_store)(struct ata_device *dev,
871 enum sw_activity val);
c1bc899f
TH		 872 /*
873 * Obsolete
9ec957f2 874 */
c1bc899f
TH		 875 void (*phy_reset)(struct ata_port *ap);
876 void (*eng_timeout)(struct ata_port *ap);
029cfd6b
TH		 877
878 /*
879 * ->inherits must be the last field and all the preceding
880 * fields must be pointers.
881 */
882 const struct ata_port_operations *inherits;
1da177e4
LT		 883};
884
885struct ata_port_info {
cca3974e 886 unsigned long flags;
0c88758b 887 unsigned long link_flags;
1da177e4
LT		 888 unsigned long pio_mask;
889 unsigned long mwdma_mask;
890 unsigned long udma_mask;
029cfd6b 891 struct ata_port_operations *port_ops;
e99f8b5e 892 void *private_data;
1da177e4
LT		 893};
894
452503f9
AC		 895struct ata_timing {
896 unsigned short mode; /* ATA mode */
897 unsigned short setup; /* t1 */
898 unsigned short act8b; /* t2 for 8-bit I/O */
899 unsigned short rec8b; /* t2i for 8-bit I/O */
900 unsigned short cyc8b; /* t0 for 8-bit I/O */
901 unsigned short active; /* t2 or tD */
902 unsigned short recover; /* t2i or tK */
3ada9c12 903 unsigned short dmack_hold; /* tj */
452503f9
AC		 904 unsigned short cycle; /* t0 */
905 unsigned short udma; /* t2CYCTYP/2 */
906};
907
624d5c51
TH		 908/*
909 * Core layer - drivers/ata/libata-core.c
910 */
e9c83914
TH		 911extern const unsigned long sata_deb_timing_normal[];
912extern const unsigned long sata_deb_timing_hotplug[];
913extern const unsigned long sata_deb_timing_long[];
914
029cfd6b 915extern struct ata_port_operations ata_dummy_port_ops;
21b0ad4f 916extern const struct ata_port_info ata_dummy_port_info;
dd5b06c4 917
e9c83914
TH		 918static inline const unsigned long *
919sata_ehc_deb_timing(struct ata_eh_context *ehc)
920{
921 if (ehc->i.flags & ATA_EHI_HOTPLUGGED)
922 return sata_deb_timing_hotplug;
923 else
924 return sata_deb_timing_normal;
925}
d7bb4cc7 926
dd5b06c4
TH		 927static inline int ata_port_is_dummy(struct ata_port *ap)
928{
929 return ap->ops == &ata_dummy_port_ops;
930}
931
936fd732 932extern int sata_set_spd(struct ata_link *link);
0aa1113d 933extern int ata_std_prereset(struct ata_link *link, unsigned long deadline);
aa2731ad
TH		 934extern int ata_wait_after_reset(struct ata_link *link, unsigned long deadline,
935 int (*check_ready)(struct ata_link *link));
936fd732
TH		 936extern int sata_link_debounce(struct ata_link *link,
937 const unsigned long *params, unsigned long deadline);
938extern int sata_link_resume(struct ata_link *link, const unsigned long *params,
939 unsigned long deadline);
cc0680a5 940extern int sata_link_hardreset(struct ata_link *link,
9dadd45b
TH		 941 const unsigned long *timing, unsigned long deadline,
942 bool *online, int (*check_ready)(struct ata_link *));
57c9efdf
TH		 943extern int sata_std_hardreset(struct ata_link *link, unsigned int *class,
944 unsigned long deadline);
203c75b8 945extern void ata_std_postreset(struct ata_link *link, unsigned int *classes);
2855568b 946
f3187195 947extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports);
f5cda257
TH		 948extern struct ata_host *ata_host_alloc_pinfo(struct device *dev,
949 const struct ata_port_info * const * ppi, int n_ports);
b1c72916 950extern int ata_slave_link_init(struct ata_port *ap);
ecef7253 951extern int ata_host_start(struct ata_host *host);
f3187195
TH		 952extern int ata_host_register(struct ata_host *host,
953 struct scsi_host_template *sht);
f5cda257
TH		 954extern int ata_host_activate(struct ata_host *host, int irq,
955 irq_handler_t irq_handler, unsigned long irq_flags,
956 struct scsi_host_template *sht);
0529c159 957extern void ata_host_detach(struct ata_host *host);
cca3974e 958extern void ata_host_init(struct ata_host *, struct device *,
029cfd6b 959 unsigned long, struct ata_port_operations *);
193515d5 960extern int ata_scsi_detect(struct scsi_host_template *sht);
1da177e4
LT		 961extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
962extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *));
94be9a58
JG		 963extern int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *dev,
964 int cmd, void __user *arg);
80289167 965extern void ata_sas_port_destroy(struct ata_port *);
cca3974e 966extern struct ata_port *ata_sas_port_alloc(struct ata_host *,
80289167
BK		 967 struct ata_port_info *, struct Scsi_Host *);
968extern int ata_sas_port_init(struct ata_port *);
969extern int ata_sas_port_start(struct ata_port *ap);
970extern void ata_sas_port_stop(struct ata_port *ap);
971extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *);
972extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
973 struct ata_port *ap);
936fd732
TH		 974extern int sata_scr_valid(struct ata_link *link);
975extern int sata_scr_read(struct ata_link *link, int reg, u32 *val);
976extern int sata_scr_write(struct ata_link *link, int reg, u32 val);
977extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val);
b5b3fa38
TH		 978extern bool ata_link_online(struct ata_link *link);
979extern bool ata_link_offline(struct ata_link *link);
6ffa01d8 980#ifdef CONFIG_PM
cca3974e
JG		 981extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg);
982extern void ata_host_resume(struct ata_host *host);
6ffa01d8 983#endif
67846b30 984extern int ata_ratelimit(void);
c22daff4 985extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
341c2c95 986 unsigned long interval, unsigned long timeout);
436d34b3 987extern int atapi_cmd_type(u8 opcode);
9977126c
TH		 988extern void ata_tf_to_fis(const struct ata_taskfile *tf,
989 u8 pmp, int is_cmd, u8 *fis);
057ace5e 990extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
7dc951ae
TH		 991extern unsigned long ata_pack_xfermask(unsigned long pio_mask,
992 unsigned long mwdma_mask, unsigned long udma_mask);
993extern void ata_unpack_xfermask(unsigned long xfer_mask,
994 unsigned long *pio_mask, unsigned long *mwdma_mask,
995 unsigned long *udma_mask);
996extern u8 ata_xfer_mask2mode(unsigned long xfer_mask);
997extern unsigned long ata_xfer_mode2mask(u8 xfer_mode);
998extern int ata_xfer_mode2shift(unsigned long xfer_mode);
999extern const char *ata_mode_string(unsigned long xfer_mask);
1000extern unsigned long ata_id_xfermask(const u16 *id);
31cc23b3 1001extern int ata_std_qc_defer(struct ata_queued_cmd *qc);
e46834cd 1002extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
1da177e4
LT		 1003extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
1004 unsigned int n_elem);
057ace5e 1005extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
10305f0f 1006extern void ata_dev_disable(struct ata_device *adev);
6a62a04d
TH		 1007extern void ata_id_string(const u16 *id, unsigned char *s,
1008 unsigned int ofs, unsigned int len);
1009extern void ata_id_c_string(const u16 *id, unsigned char *s,
1010 unsigned int ofs, unsigned int len);
963e4975
AC		 1011extern unsigned int ata_do_dev_read_id(struct ata_device *dev,
1012 struct ata_taskfile *tf, u16 *id);
f686bcb8 1013extern void ata_qc_complete(struct ata_queued_cmd *qc);
79f97dad 1014extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active);
3373efd8 1015extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
1da177e4
LT		 1016 void (*done)(struct scsi_cmnd *));
1017extern int ata_std_bios_param(struct scsi_device *sdev,
1018 struct block_device *bdev,
1019 sector_t capacity, int geom[]);
1020extern int ata_scsi_slave_config(struct scsi_device *sdev);
83c47bcb 1021extern void ata_scsi_slave_destroy(struct scsi_device *sdev);
a6e6ce8e 1022extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
e881a172 1023 int queue_depth, int reason);
3373efd8 1024extern struct ata_device *ata_dev_pair(struct ata_device *adev);
0260731f 1025extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev);
1da177e4 1026
be0d18df
AC		 1027extern int ata_cable_40wire(struct ata_port *ap);
1028extern int ata_cable_80wire(struct ata_port *ap);
1029extern int ata_cable_sata(struct ata_port *ap);
c88f90c3 1030extern int ata_cable_ignore(struct ata_port *ap);
be0d18df
AC		 1031extern int ata_cable_unknown(struct ata_port *ap);
1032
624d5c51 1033/* Timing helpers */
1bc4ccff 1034extern unsigned int ata_pio_need_iordy(const struct ata_device *);
6357357c 1035extern const struct ata_timing *ata_timing_find_mode(u8 xfer_mode);
452503f9
AC		 1036extern int ata_timing_compute(struct ata_device *, unsigned short,
1037 struct ata_timing *, int, int);
1038extern void ata_timing_merge(const struct ata_timing *,
1039 const struct ata_timing *, struct ata_timing *,
1040 unsigned int);
a0f79b92 1041extern u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle);
452503f9 1042
624d5c51
TH		 1043/* PCI */
1044#ifdef CONFIG_PCI
1045struct pci_dev;
1046
1047struct pci_bits {
1048 unsigned int reg; /* PCI config register to read */
1049 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
1050 unsigned long mask;
1051 unsigned long val;
452503f9
AC		 1052};
1053
624d5c51
TH		 1054extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
1055extern void ata_pci_remove_one(struct pci_dev *pdev);
1056
1057#ifdef CONFIG_PM
1058extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg);
1059extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev);
1060extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
1061extern int ata_pci_device_resume(struct pci_dev *pdev);
1062#endif /* CONFIG_PM */
1063#endif /* CONFIG_PCI */
1064
1065/*
1066 * ACPI - drivers/ata/libata-acpi.c
1067 */
e1ddb4b6 1068#ifdef CONFIG_ATA_ACPI
c05e6ff0
TH		 1069static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
1070{
1071 if (ap->pflags & ATA_PFLAG_INIT_GTM_VALID)
1072 return &ap->__acpi_init_gtm;
1073 return NULL;
1074}
0d02f0b2
TH		 1075int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm);
1076int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *stm);
7c77fa4d
TH		 1077unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev,
1078 const struct ata_acpi_gtm *gtm);
021ee9a6 1079int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm);
e1ddb4b6 1080#else
c05e6ff0
TH		 1081static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
1082{
1083 return NULL;
1084}
7c77fa4d
TH		 1085
1086static inline int ata_acpi_stm(const struct ata_port *ap,
1087 struct ata_acpi_gtm *stm)
1088{
1089 return -ENOSYS;
1090}
1091
1092static inline int ata_acpi_gtm(const struct ata_port *ap,
1093 struct ata_acpi_gtm *stm)
1094{
1095 return -ENOSYS;
1096}
1097
1098static inline unsigned int ata_acpi_gtm_xfermask(struct ata_device *dev,
1099 const struct ata_acpi_gtm *gtm)
1100{
1101 return 0;
1102}
021ee9a6
TH		 1103
1104static inline int ata_acpi_cbl_80wire(struct ata_port *ap,
1105 const struct ata_acpi_gtm *gtm)
1106{
1107 return 0;
1108}
e1ddb4b6 1109#endif
1da177e4 1110
ece1d636 1111/*
624d5c51 1112 * EH - drivers/ata/libata-eh.c
ece1d636 1113 */
7b70fc03 1114extern void ata_port_schedule_eh(struct ata_port *ap);
dbd82616 1115extern int ata_link_abort(struct ata_link *link);
7b70fc03 1116extern int ata_port_abort(struct ata_port *ap);
e3180499 1117extern int ata_port_freeze(struct ata_port *ap);
7d77b247 1118extern int sata_async_notification(struct ata_port *ap);
e3180499
TH		 1119
1120extern void ata_eh_freeze_port(struct ata_port *ap);
1121extern void ata_eh_thaw_port(struct ata_port *ap);
7b70fc03 1122
ece1d636
TH		 1123extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
1124extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
10acf3b0 1125extern void ata_eh_analyze_ncq_error(struct ata_link *link);
ece1d636 1126
f5914a46
TH		 1127extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
1128 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
1129 ata_postreset_fn_t postreset);
a1efdaba 1130extern void ata_std_error_handler(struct ata_port *ap);
022bdb07 1131
68d1d07b
TH		 1132/*
1133 * Base operations to inherit from and initializers for sht
1134 *
1135 * Operations
1136 *
1137 * base : Common to all libata drivers.
1138 * sata : SATA controllers w/ native interface.
1139 * pmp : SATA controllers w/ PMP support.
1140 * sff : SFF ATA controllers w/o BMDMA support.
1141 * bmdma : SFF ATA controllers w/ BMDMA support.
1142 *
1143 * sht initializers
1144 *
1145 * BASE : Common to all libata drivers. The user must set
1146 * sg_tablesize and dma_boundary.
1147 * PIO : SFF ATA controllers w/ only PIO support.
1148 * BMDMA : SFF ATA controllers w/ BMDMA support. sg_tablesize and
1149 * dma_boundary are set to BMDMA limits.
1150 * NCQ : SATA controllers supporting NCQ. The user must set
1151 * sg_tablesize, dma_boundary and can_queue.
1152 */
1153extern const struct ata_port_operations ata_base_port_ops;
1154extern const struct ata_port_operations sata_port_ops;
45fabbb7 1155extern struct device_attribute *ata_common_sdev_attrs[];
68d1d07b
TH		 1156
1157#define ATA_BASE_SHT(drv_name) \
1158 .module = THIS_MODULE, \
1159 .name = drv_name, \
1160 .ioctl = ata_scsi_ioctl, \
1161 .queuecommand = ata_scsi_queuecmd, \
1162 .can_queue = ATA_DEF_QUEUE, \
1163 .this_id = ATA_SHT_THIS_ID, \
1164 .cmd_per_lun = ATA_SHT_CMD_PER_LUN, \
1165 .emulated = ATA_SHT_EMULATED, \
1166 .use_clustering = ATA_SHT_USE_CLUSTERING, \
1167 .proc_name = drv_name, \
1168 .slave_configure = ata_scsi_slave_config, \
1169 .slave_destroy = ata_scsi_slave_destroy, \
45fabbb7
EO		 1170 .bios_param = ata_std_bios_param, \
1171 .sdev_attrs = ata_common_sdev_attrs
68d1d07b 1172
68d1d07b
TH		 1173#define ATA_NCQ_SHT(drv_name) \
1174 ATA_BASE_SHT(drv_name), \
1175 .change_queue_depth = ata_scsi_change_queue_depth
1176
071f44b1
TH		 1177/*
1178 * PMP helpers
1179 */
88fcd562 1180#ifdef CONFIG_SATA_PMP
071f44b1
TH		 1181static inline bool sata_pmp_supported(struct ata_port *ap)
1182{
1183 return ap->flags & ATA_FLAG_PMP;
1184}
1185
1186static inline bool sata_pmp_attached(struct ata_port *ap)
1187{
1188 return ap->nr_pmp_links != 0;
1189}
1190
1191static inline int ata_is_host_link(const struct ata_link *link)
1192{
b1c72916 1193 return link == &link->ap->link || link == link->ap->slave_link;
071f44b1 1194}
88fcd562
TH		 1195#else /* CONFIG_SATA_PMP */
1196static inline bool sata_pmp_supported(struct ata_port *ap)
1197{
1198 return false;
1199}
1200
1201static inline bool sata_pmp_attached(struct ata_port *ap)
1202{
1203 return false;
1204}
1205
1206static inline int ata_is_host_link(const struct ata_link *link)
1207{
1208 return 1;
1209}
1210#endif /* CONFIG_SATA_PMP */
071f44b1
TH		 1211
1212static inline int sata_srst_pmp(struct ata_link *link)
1213{
1214 if (sata_pmp_supported(link->ap) && ata_is_host_link(link))
1215 return SATA_PMP_CTRL_PORT;
1216 return link->pmp;
1217}
1218
61440db6
TH		 1219/*
1220 * printk helpers
1221 */
1222#define ata_port_printk(ap, lv, fmt, args...) \
c2e366a1 1223 printk("%sata%u: "fmt, lv, (ap)->print_id , ##args)
61440db6 1224
8989805d 1225#define ata_link_printk(link, lv, fmt, args...) do { \
b1c72916 1226 if (sata_pmp_attached((link)->ap) || (link)->ap->slave_link) \
c2e366a1 1227 printk("%sata%u.%02u: "fmt, lv, (link)->ap->print_id, \
8989805d
TH		 1228 (link)->pmp , ##args); \
1229 else \
c2e366a1 1230 printk("%sata%u: "fmt, lv, (link)->ap->print_id , ##args); \
8989805d 1231 } while(0)
9af5c9c9 1232
61440db6 1233#define ata_dev_printk(dev, lv, fmt, args...) \
c2e366a1 1234 printk("%sata%u.%02u: "fmt, lv, (dev)->link->ap->print_id, \
8989805d 1235 (dev)->link->pmp + (dev)->devno , ##args)
1da177e4 1236
f3e81b19
TH		 1237/*
1238 * ata_eh_info helpers
1239 */
cb94c1cf
TH		 1240extern void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...)
1241 __attribute__ ((format (printf, 2, 3)));
1242extern void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...)
1243 __attribute__ ((format (printf, 2, 3)));
b64bbc39 1244extern void ata_ehi_clear_desc(struct ata_eh_info *ehi);
f3e81b19 1245
c0b6c037
TH		 1246static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
1247{
b558eddd 1248 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
f8f1e1cc 1249 ehi->flags |= ATA_EHI_HOTPLUGGED;
b558eddd 1250 ehi->action |= ATA_EH_RESET | ATA_EH_ENABLE_LINK;
c0b6c037
TH		 1251 ehi->err_mask |= AC_ERR_ATA_BUS;
1252}
1253
cbcdd875
TH		 1254/*
1255 * port description helpers
1256 */
1257extern void ata_port_desc(struct ata_port *ap, const char *fmt, ...)
1258 __attribute__ ((format (printf, 2, 3)));
1259#ifdef CONFIG_PCI
1260extern void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset,
1261 const char *name);
1262#endif
1263
1da177e4
LT		 1264static inline unsigned int ata_tag_valid(unsigned int tag)
1265{
1266 return (tag < ATA_MAX_QUEUE) ? 1 : 0;
1267}
1268
2ab7db1f
TH		 1269static inline unsigned int ata_tag_internal(unsigned int tag)
1270{
83c063dd 1271 return tag == ATA_TAG_INTERNAL;
2ab7db1f
TH		 1272}
1273
5806db22
TH		 1274/*
1275 * device helpers
1276 */
e1211e3f 1277static inline unsigned int ata_class_enabled(unsigned int class)
597afd21 1278{
e0a71752
TH		 1279 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI ||
1280 class == ATA_DEV_PMP || class == ATA_DEV_SEMB;
597afd21
TH		 1281}
1282
e1211e3f 1283static inline unsigned int ata_class_disabled(unsigned int class)
1da177e4 1284{
e0a71752
TH		 1285 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP ||
1286 class == ATA_DEV_PMP_UNSUP || class == ATA_DEV_SEMB_UNSUP;
e1211e3f
TH		 1287}
1288
002c8054
TH		 1289static inline unsigned int ata_class_absent(unsigned int class)
1290{
1291 return !ata_class_enabled(class) && !ata_class_disabled(class);
1292}
1293
e1211e3f
TH		 1294static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
1295{
1296 return ata_class_enabled(dev->class);
1297}
1298
1299static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
1300{
1301 return ata_class_disabled(dev->class);
1da177e4
LT		 1302}
1303
002c8054
TH		 1304static inline unsigned int ata_dev_absent(const struct ata_device *dev)
1305{
1306 return ata_class_absent(dev->class);
1307}
1308
5806db22 1309/*
f58229f8 1310 * link helpers
5806db22 1311 */
f58229f8 1312static inline int ata_link_max_devices(const struct ata_link *link)
5806db22 1313{
8989805d 1314 if (ata_is_host_link(link) && link->ap->flags & ATA_FLAG_SLAVE_POSS)
5806db22
TH		 1315 return 2;
1316 return 1;
1317}
1318
da917d69
TH		 1319static inline int ata_link_active(struct ata_link *link)
1320{
1321 return ata_tag_valid(link->active_tag) || link->sactive;
1322}
1323
1eca4365
TH		 1324/*
1325 * Iterators
1326 *
1327 * ATA_LITER_* constants are used to select link iteration mode and
1328 * ATA_DITER_* device iteration mode.
1329 *
1330 * For a custom iteration directly using ata_{link|dev}_next(), if
1331 * @link or @dev, respectively, is NULL, the first element is
1332 * returned. @dev and @link can be any valid device or link and the
1333 * next element according to the iteration mode will be returned.
1334 * After the last element, NULL is returned.
1335 */
1336enum ata_link_iter_mode {
1337 ATA_LITER_EDGE, /* if present, PMP links only; otherwise,
1338 * host link. no slave link */
1339 ATA_LITER_HOST_FIRST, /* host link followed by PMP or slave links */
1340 ATA_LITER_PMP_FIRST, /* PMP links followed by host link,
1341 * slave link still comes after host link */
1342};
1343
1344enum ata_dev_iter_mode {
1345 ATA_DITER_ENABLED,
1346 ATA_DITER_ENABLED_REVERSE,
1347 ATA_DITER_ALL,
1348 ATA_DITER_ALL_REVERSE,
1349};
1350
1351extern struct ata_link *ata_link_next(struct ata_link *link,
1352 struct ata_port *ap,
1353 enum ata_link_iter_mode mode);
1354
1355extern struct ata_device *ata_dev_next(struct ata_device *dev,
1356 struct ata_link *link,
1357 enum ata_dev_iter_mode mode);
1358
1359/*
1360 * Shortcut notation for iterations
1361 *
1362 * ata_for_each_link() iterates over each link of @ap according to
1363 * @mode. @link points to the current link in the loop. @link is
1364 * NULL after loop termination. ata_for_each_dev() works the same way
1365 * except that it iterates over each device of @link.
1366 *
1367 * Note that the mode prefixes ATA_{L|D}ITER_ shouldn't need to be
1368 * specified when using the following shorthand notations. Only the
1369 * mode itself (EDGE, HOST_FIRST, ENABLED, etc...) should be
1370 * specified. This not only increases brevity but also makes it
1371 * impossible to use ATA_LITER_* for device iteration or vice-versa.
1372 */
1373#define ata_for_each_link(link, ap, mode) \
1374 for ((link) = ata_link_next(NULL, (ap), ATA_LITER_##mode); (link); \
1375 (link) = ata_link_next((link), (ap), ATA_LITER_##mode))
1376
1377#define ata_for_each_dev(dev, link, mode) \
1378 for ((dev) = ata_dev_next(NULL, (link), ATA_DITER_##mode); (dev); \
1379 (dev) = ata_dev_next((dev), (link), ATA_DITER_##mode))
5806db22 1380
6d1245bf
TH		 1381/**
1382 * ata_ncq_enabled - Test whether NCQ is enabled
1383 * @dev: ATA device to test for
1384 *
1385 * LOCKING:
1386 * spin_lock_irqsave(host lock)
1387 *
1388 * RETURNS:
1389 * 1 if NCQ is enabled for @dev, 0 otherwise.
1390 */
1391static inline int ata_ncq_enabled(struct ata_device *dev)
1392{
1393 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF |
1394 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ;
1395}
0baab86b 1396
1da177e4
LT		 1397static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
1398{
1399 qc->tf.ctl |= ATA_NIEN;
1400}
1401
f69499f4
TH		 1402static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap,
1403 unsigned int tag)
1da177e4
LT		 1404{
1405 if (likely(ata_tag_valid(tag)))
1406 return &ap->qcmd[tag];
1407 return NULL;
1408}
1409
f69499f4
TH		 1410static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap,
1411 unsigned int tag)
1412{
1413 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
1414
1415 if (unlikely(!qc) || !ap->ops->error_handler)
1416 return qc;
1417
1418 if ((qc->flags & (ATA_QCFLAG_ACTIVE |
1419 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE)
1420 return qc;
1421
1422 return NULL;
1423}
1424
aacda375
TH		 1425static inline unsigned int ata_qc_raw_nbytes(struct ata_queued_cmd *qc)
1426{
1427 return qc->nbytes - min(qc->extrabytes, qc->nbytes);
1428}
1429
3373efd8 1430static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
1da177e4
LT		 1431{
1432 memset(tf, 0, sizeof(*tf));
1433
5fe7454a 1434#ifdef CONFIG_ATA_SFF
9af5c9c9 1435 tf->ctl = dev->link->ap->ctl;
5fe7454a
TH		 1436#else
1437 tf->ctl = ATA_DEVCTL_OBS;
1438#endif
3373efd8 1439 if (dev->devno == 0)
1da177e4
LT		 1440 tf->device = ATA_DEVICE_OBS;
1441 else
1442 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
1443}
1444
2c13b7ce
JG		 1445static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
1446{
501e0c50 1447 qc->dma_dir = DMA_NONE;
ff2aeb1e 1448 qc->sg = NULL;
2c13b7ce 1449 qc->flags = 0;
87260216
JA		 1450 qc->cursg = NULL;
1451 qc->cursg_ofs = 0;
aacda375 1452 qc->nbytes = qc->extrabytes = qc->curbytes = 0;
7a801184 1453 qc->n_elem = 0;
a22e2eb0 1454 qc->err_mask = 0;
5a5dbd18 1455 qc->sect_size = ATA_SECT_SIZE;
2c13b7ce 1456
3373efd8 1457 ata_tf_init(qc->dev, &qc->tf);
e61e0672
TH		 1458
1459 /* init result_tf such that it indicates normal completion */
1460 qc->result_tf.command = ATA_DRDY;
1461 qc->result_tf.feature = 0;
2c13b7ce
JG		 1462}
1463
057ace5e 1464static inline int ata_try_flush_cache(const struct ata_device *dev)
1da177e4
LT		 1465{
1466 return ata_id_wcache_enabled(dev->id) ||
1467 ata_id_has_flush(dev->id) ||
1468 ata_id_has_flush_ext(dev->id);
1469}
1470
a7dac447
JG		 1471static inline unsigned int ac_err_mask(u8 status)
1472{
3655d1d3 1473 if (status & (ATA_BUSY | ATA_DRQ))
11a56d24 1474 return AC_ERR_HSM;
a7dac447
JG		 1475 if (status & (ATA_ERR | ATA_DF))
1476 return AC_ERR_DEV;
1477 return 0;
1478}
1479
1480static inline unsigned int __ac_err_mask(u8 status)
1481{
1482 unsigned int mask = ac_err_mask(status);
1483 if (mask == 0)
1484 return AC_ERR_OTHER;
1485 return mask;
1486}
1487
35bb94b1
JG		 1488static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
1489{
4911487a 1490 return *(struct ata_port **)&host->hostdata[0];
35bb94b1
JG		 1491}
1492
78ab88f0
TH		 1493static inline int ata_check_ready(u8 status)
1494{
005b1f74
JG		 1495 if (!(status & ATA_BUSY))
1496 return 1;
78ab88f0
TH		 1497
1498 /* 0xff indicates either no device or device not ready */
1499 if (status == 0xff)
1500 return -ENODEV;
1501
005b1f74 1502 return 0;
78ab88f0
TH		 1503}
1504
341c2c95
TH		 1505static inline unsigned long ata_deadline(unsigned long from_jiffies,
1506 unsigned long timeout_msecs)
1507{
1508 return from_jiffies + msecs_to_jiffies(timeout_msecs);
1509}
1510
b15b3eba
AC		 1511/* Don't open code these in drivers as there are traps. Firstly the range may
1512 change in future hardware and specs, secondly 0xFF means 'no DMA' but is
1513 > UDMA_0. Dyma ddreigiau */
1514
1515static inline int ata_using_mwdma(struct ata_device *adev)
1516{
1517 if (adev->dma_mode >= XFER_MW_DMA_0 && adev->dma_mode <= XFER_MW_DMA_4)
1518 return 1;
1519 return 0;
1520}
1521
1522static inline int ata_using_udma(struct ata_device *adev)
1523{
1524 if (adev->dma_mode >= XFER_UDMA_0 && adev->dma_mode <= XFER_UDMA_7)
1525 return 1;
1526 return 0;
1527}
1528
1529static inline int ata_dma_enabled(struct ata_device *adev)
1530{
1531 return (adev->dma_mode == 0xFF ? 0 : 1);
1532}
48515f6c
TH		 1533
1534/**************************************************************************
1535 * PMP - drivers/ata/libata-pmp.c
1536 */
88fcd562
TH		 1537#ifdef CONFIG_SATA_PMP
1538
48515f6c
TH		 1539extern const struct ata_port_operations sata_pmp_port_ops;
1540
1541extern int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc);
1542extern void sata_pmp_error_handler(struct ata_port *ap);
1543
88fcd562
TH		 1544#else /* CONFIG_SATA_PMP */
1545
1546#define sata_pmp_port_ops sata_port_ops
1547#define sata_pmp_qc_defer_cmd_switch ata_std_qc_defer
1548#define sata_pmp_error_handler ata_std_error_handler
1549
1550#endif /* CONFIG_SATA_PMP */
1551
48515f6c 1552
624d5c51
TH		 1553/**************************************************************************
1554 * SFF - drivers/ata/libata-sff.c
1555 */
127102ae
TH		 1556#ifdef CONFIG_ATA_SFF
1557
624d5c51
TH		 1558extern const struct ata_port_operations ata_sff_port_ops;
1559extern const struct ata_port_operations ata_bmdma_port_ops;
871af121 1560extern const struct ata_port_operations ata_bmdma32_port_ops;
624d5c51
TH		 1561
1562/* PIO only, sg_tablesize and dma_boundary limits can be removed */
1563#define ATA_PIO_SHT(drv_name) \
1564 ATA_BASE_SHT(drv_name), \
1565 .sg_tablesize = LIBATA_MAX_PRD, \
1566 .dma_boundary = ATA_DMA_BOUNDARY
1567
1568#define ATA_BMDMA_SHT(drv_name) \
1569 ATA_BASE_SHT(drv_name), \
1570 .sg_tablesize = LIBATA_MAX_PRD, \
1571 .dma_boundary = ATA_DMA_BOUNDARY
1572
9363c382
TH		 1573extern void ata_sff_qc_prep(struct ata_queued_cmd *qc);
1574extern void ata_sff_dumb_qc_prep(struct ata_queued_cmd *qc);
1575extern void ata_sff_dev_select(struct ata_port *ap, unsigned int device);
1576extern u8 ata_sff_check_status(struct ata_port *ap);
a57c1bad
AC		 1577extern void ata_sff_pause(struct ata_port *ap);
1578extern void ata_sff_dma_pause(struct ata_port *ap);
9363c382
TH		 1579extern int ata_sff_busy_sleep(struct ata_port *ap,
1580 unsigned long timeout_pat, unsigned long timeout);
705e76be 1581extern int ata_sff_wait_ready(struct ata_link *link, unsigned long deadline);
9363c382
TH		 1582extern void ata_sff_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
1583extern void ata_sff_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
1584extern void ata_sff_exec_command(struct ata_port *ap,
1585 const struct ata_taskfile *tf);
1586extern unsigned int ata_sff_data_xfer(struct ata_device *dev,
624d5c51 1587 unsigned char *buf, unsigned int buflen, int rw);
871af121
AC		 1588extern unsigned int ata_sff_data_xfer32(struct ata_device *dev,
1589 unsigned char *buf, unsigned int buflen, int rw);
9363c382 1590extern unsigned int ata_sff_data_xfer_noirq(struct ata_device *dev,
624d5c51 1591 unsigned char *buf, unsigned int buflen, int rw);
e42a542b 1592extern void ata_sff_irq_on(struct ata_port *ap);
9363c382
TH		 1593extern void ata_sff_irq_clear(struct ata_port *ap);
1594extern int ata_sff_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
1595 u8 status, int in_wq);
c429137a 1596extern void ata_sff_queue_pio_task(struct ata_port *ap, unsigned long delay);
9363c382 1597extern unsigned int ata_sff_qc_issue(struct ata_queued_cmd *qc);
22183bf5 1598extern bool ata_sff_qc_fill_rtf(struct ata_queued_cmd *qc);
9363c382
TH		 1599extern unsigned int ata_sff_host_intr(struct ata_port *ap,
1600 struct ata_queued_cmd *qc);
1601extern irqreturn_t ata_sff_interrupt(int irq, void *dev_instance);
c96f1732 1602extern void ata_sff_lost_interrupt(struct ata_port *ap);
9363c382
TH		 1603extern void ata_sff_freeze(struct ata_port *ap);
1604extern void ata_sff_thaw(struct ata_port *ap);
1605extern int ata_sff_prereset(struct ata_link *link, unsigned long deadline);
1606extern unsigned int ata_sff_dev_classify(struct ata_device *dev, int present,
1607 u8 *r_err);
705e76be
TH		 1608extern int ata_sff_wait_after_reset(struct ata_link *link, unsigned int devmask,
1609 unsigned long deadline);
9363c382 1610extern int ata_sff_softreset(struct ata_link *link, unsigned int *classes,
624d5c51 1611 unsigned long deadline);
9363c382
TH		 1612extern int sata_sff_hardreset(struct ata_link *link, unsigned int *class,
1613 unsigned long deadline);
1614extern void ata_sff_postreset(struct ata_link *link, unsigned int *classes);
3d47aa8e 1615extern void ata_sff_drain_fifo(struct ata_queued_cmd *qc);
9363c382
TH		 1616extern void ata_sff_error_handler(struct ata_port *ap);
1617extern void ata_sff_post_internal_cmd(struct ata_queued_cmd *qc);
9363c382 1618extern void ata_sff_std_ports(struct ata_ioports *ioaddr);
624d5c51 1619#ifdef CONFIG_PCI
9363c382
TH		 1620extern int ata_pci_sff_init_host(struct ata_host *host);
1621extern int ata_pci_sff_prepare_host(struct pci_dev *pdev,
624d5c51
TH		 1622 const struct ata_port_info * const * ppi,
1623 struct ata_host **r_host);
9363c382 1624extern int ata_pci_sff_activate_host(struct ata_host *host,
624d5c51
TH		 1625 irq_handler_t irq_handler,
1626 struct scsi_host_template *sht);
9363c382 1627extern int ata_pci_sff_init_one(struct pci_dev *pdev,
16ea0fc9
AC		 1628 const struct ata_port_info * const * ppi,
1629 struct scsi_host_template *sht, void *host_priv, int hflags);
624d5c51
TH		 1630#endif /* CONFIG_PCI */
1631
9f2f7210
TH		 1632extern void ata_bmdma_setup(struct ata_queued_cmd *qc);
1633extern void ata_bmdma_start(struct ata_queued_cmd *qc);
1634extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
1635extern u8 ata_bmdma_status(struct ata_port *ap);
c7087652
TH		 1636extern int ata_bmdma_port_start(struct ata_port *ap);
1637extern int ata_bmdma_port_start32(struct ata_port *ap);
9f2f7210
TH		 1638
1639#ifdef CONFIG_PCI
1640extern int ata_pci_bmdma_clear_simplex(struct pci_dev *pdev);
c7087652 1641extern void ata_pci_bmdma_init(struct ata_host *host);
9f2f7210
TH		 1642#endif /* CONFIG_PCI */
1643
624d5c51 1644/**
9363c382 1645 * ata_sff_busy_wait - Wait for a port status register
624d5c51
TH		 1646 * @ap: Port to wait for.
1647 * @bits: bits that must be clear
1648 * @max: number of 10uS waits to perform
1649 *
1650 * Waits up to max*10 microseconds for the selected bits in the port's
1651 * status register to be cleared.
1652 * Returns final value of status register.
1653 *
1654 * LOCKING:
1655 * Inherited from caller.
1656 */
9363c382
TH		 1657static inline u8 ata_sff_busy_wait(struct ata_port *ap, unsigned int bits,
1658 unsigned int max)
624d5c51
TH		 1659{
1660 u8 status;
1661
1662 do {
1663 udelay(10);
5682ed33 1664 status = ap->ops->sff_check_status(ap);
624d5c51
TH		 1665 max--;
1666 } while (status != 0xff && (status & bits) && (max > 0));
1667
1668 return status;
1669}
1670
1671/**
1672 * ata_wait_idle - Wait for a port to be idle.
1673 * @ap: Port to wait for.
1674 *
1675 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
1676 * Returns final value of status register.
1677 *
1678 * LOCKING:
1679 * Inherited from caller.
1680 */
1681static inline u8 ata_wait_idle(struct ata_port *ap)
1682{
9363c382 1683 u8 status = ata_sff_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
624d5c51
TH		 1684
1685#ifdef ATA_DEBUG
1686 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ)))
1687 ata_port_printk(ap, KERN_DEBUG, "abnormal Status 0x%X\n",
1688 status);
1689#endif
1690
1691 return status;
1692}
127102ae 1693#endif /* CONFIG_ATA_SFF */
624d5c51 1694
1da177e4 1695#endif /* __LINUX_LIBATA_H__ */
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