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HWPOISON: Add simple debugfs interface to inject hwpoison on arbitary PFNs
[linux-2.6.git] / include / linux / libata.h
blob76319bf03e373b89719d00feb0cbfcd3bbeaf293
1 /*
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 *
24 */
25
26 #ifndef __LINUX_LIBATA_H__
27 #define __LINUX_LIBATA_H__
28
29 #include <linux/delay.h>
30 #include <linux/jiffies.h>
31 #include <linux/interrupt.h>
32 #include <linux/dma-mapping.h>
33 #include <linux/scatterlist.h>
34 #include <linux/io.h>
35 #include <linux/ata.h>
36 #include <linux/workqueue.h>
37 #include <scsi/scsi_host.h>
38 #include <linux/acpi.h>
39 #include <linux/cdrom.h>
40
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
46 #include <asm/libata-portmap.h>
47 #else
48 #include <asm-generic/libata-portmap.h>
49 #endif
50
51 /*
52 * compile-time options: to be removed as soon as all the drivers are
53 * converted to the new debugging mechanism
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 */
59
60
61 /* note: prints function name for you */
62 #ifdef ATA_DEBUG
63 #define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args)
64 #ifdef ATA_VERBOSE_DEBUG
65 #define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args)
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
74 #define BPRINTK(fmt, args...) if (ap->flags & ATA_FLAG_DEBUGMSG) printk(KERN_ERR "%s: " fmt, __func__, ## args)
75
76 /* NEW: debug levels */
77 #define HAVE_LIBATA_MSG 1
78
79 enum {
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
99 static 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
108 /* defines only for the constants which don't work well as enums */
109 #define ATA_TAG_POISON 0xfafbfcfdU
110
111 enum {
112 /* various global constants */
113 LIBATA_MAX_PRD = ATA_MAX_PRD / 2,
114 LIBATA_DUMB_MAX_PRD = ATA_MAX_PRD / 4, /* Worst case */
115 ATA_DEF_QUEUE = 1,
116 /* tag ATA_MAX_QUEUE - 1 is reserved for internal commands */
117 ATA_MAX_QUEUE = 32,
118 ATA_TAG_INTERNAL = ATA_MAX_QUEUE - 1,
119 ATA_SHORT_PAUSE = 16,
120
121 ATAPI_MAX_DRAIN = 16 << 10,
122
123 ATA_ALL_DEVICES = (1 << ATA_MAX_DEVICES) - 1,
124
125 ATA_SHT_EMULATED = 1,
126 ATA_SHT_CMD_PER_LUN = 1,
127 ATA_SHT_THIS_ID = -1,
128 ATA_SHT_USE_CLUSTERING = 1,
129
130 /* struct ata_device stuff */
131 ATA_DFLAG_LBA = (1 << 0), /* device supports LBA */
132 ATA_DFLAG_LBA48 = (1 << 1), /* device supports LBA48 */
133 ATA_DFLAG_CDB_INTR = (1 << 2), /* device asserts INTRQ when ready for CDB */
134 ATA_DFLAG_NCQ = (1 << 3), /* device supports NCQ */
135 ATA_DFLAG_FLUSH_EXT = (1 << 4), /* do FLUSH_EXT instead of FLUSH */
136 ATA_DFLAG_ACPI_PENDING = (1 << 5), /* ACPI resume action pending */
137 ATA_DFLAG_ACPI_FAILED = (1 << 6), /* ACPI on devcfg has failed */
138 ATA_DFLAG_AN = (1 << 7), /* AN configured */
139 ATA_DFLAG_HIPM = (1 << 8), /* device supports HIPM */
140 ATA_DFLAG_DIPM = (1 << 9), /* device supports DIPM */
141 ATA_DFLAG_DMADIR = (1 << 10), /* device requires DMADIR */
142 ATA_DFLAG_CFG_MASK = (1 << 12) - 1,
143
144 ATA_DFLAG_PIO = (1 << 12), /* device limited to PIO mode */
145 ATA_DFLAG_NCQ_OFF = (1 << 13), /* device limited to non-NCQ mode */
146 ATA_DFLAG_SLEEPING = (1 << 15), /* device is sleeping */
147 ATA_DFLAG_DUBIOUS_XFER = (1 << 16), /* data transfer not verified */
148 ATA_DFLAG_NO_UNLOAD = (1 << 17), /* device doesn't support unload */
149 ATA_DFLAG_INIT_MASK = (1 << 24) - 1,
150
151 ATA_DFLAG_DETACH = (1 << 24),
152 ATA_DFLAG_DETACHED = (1 << 25),
153
154 ATA_DEV_UNKNOWN = 0, /* unknown device */
155 ATA_DEV_ATA = 1, /* ATA device */
156 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */
157 ATA_DEV_ATAPI = 3, /* ATAPI device */
158 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */
159 ATA_DEV_PMP = 5, /* SATA port multiplier */
160 ATA_DEV_PMP_UNSUP = 6, /* SATA port multiplier (unsupported) */
161 ATA_DEV_SEMB = 7, /* SEMB */
162 ATA_DEV_SEMB_UNSUP = 8, /* SEMB (unsupported) */
163 ATA_DEV_NONE = 9, /* no device */
164
165 /* struct ata_link flags */
166 ATA_LFLAG_NO_HRST = (1 << 1), /* avoid hardreset */
167 ATA_LFLAG_NO_SRST = (1 << 2), /* avoid softreset */
168 ATA_LFLAG_ASSUME_ATA = (1 << 3), /* assume ATA class */
169 ATA_LFLAG_ASSUME_SEMB = (1 << 4), /* assume SEMB class */
170 ATA_LFLAG_ASSUME_CLASS = ATA_LFLAG_ASSUME_ATA | ATA_LFLAG_ASSUME_SEMB,
171 ATA_LFLAG_NO_RETRY = (1 << 5), /* don't retry this link */
172 ATA_LFLAG_DISABLED = (1 << 6), /* link is disabled */
173 ATA_LFLAG_SW_ACTIVITY = (1 << 7), /* keep activity stats */
174
175 /* struct ata_port flags */
176 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */
177 /* (doesn't imply presence) */
178 ATA_FLAG_SATA = (1 << 1),
179 ATA_FLAG_NO_LEGACY = (1 << 2), /* no legacy mode check */
180 ATA_FLAG_MMIO = (1 << 3), /* use MMIO, not PIO */
181 ATA_FLAG_SRST = (1 << 4), /* (obsolete) use ATA SRST, not E.D.D. */
182 ATA_FLAG_SATA_RESET = (1 << 5), /* (obsolete) use COMRESET */
183 ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */
184 ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */
185 ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */
186 ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD
187 * doesn't handle PIO interrupts */
188 ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */
189 ATA_FLAG_NO_POWEROFF_SPINDOWN = (1 << 11), /* don't spindown before poweroff */
190 ATA_FLAG_NO_HIBERNATE_SPINDOWN = (1 << 12), /* don't spindown before hibernation */
191 ATA_FLAG_DEBUGMSG = (1 << 13),
192 ATA_FLAG_FPDMA_AA = (1 << 14), /* driver supports Auto-Activate */
193 ATA_FLAG_IGN_SIMPLEX = (1 << 15), /* ignore SIMPLEX */
194 ATA_FLAG_NO_IORDY = (1 << 16), /* controller lacks iordy */
195 ATA_FLAG_ACPI_SATA = (1 << 17), /* need native SATA ACPI layout */
196 ATA_FLAG_AN = (1 << 18), /* controller supports AN */
197 ATA_FLAG_PMP = (1 << 19), /* controller supports PMP */
198 ATA_FLAG_IPM = (1 << 20), /* driver can handle IPM */
199 ATA_FLAG_EM = (1 << 21), /* driver supports enclosure
200 * management */
201 ATA_FLAG_SW_ACTIVITY = (1 << 22), /* driver supports sw activity
202 * led */
203
204 /* The following flag belongs to ap->pflags but is kept in
205 * ap->flags because it's referenced in many LLDs and will be
206 * removed in not-too-distant future.
207 */
208 ATA_FLAG_DISABLED = (1 << 23), /* port is disabled, ignore it */
209
210 /* bits 24:31 of ap->flags are reserved for LLD specific flags */
211
212
213 /* struct ata_port pflags */
214 ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */
215 ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */
216 ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */
217 ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */
218 ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */
219 ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */
220 ATA_PFLAG_INITIALIZING = (1 << 7), /* being initialized, don't touch */
221 ATA_PFLAG_RESETTING = (1 << 8), /* reset in progress */
222 ATA_PFLAG_UNLOADING = (1 << 9), /* driver is being unloaded */
223 ATA_PFLAG_UNLOADED = (1 << 10), /* driver is unloaded */
224
225 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */
226 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */
227 ATA_PFLAG_INIT_GTM_VALID = (1 << 19), /* initial gtm data valid */
228
229 ATA_PFLAG_PIO32 = (1 << 20), /* 32bit PIO */
230 ATA_PFLAG_PIO32CHANGE = (1 << 21), /* 32bit PIO can be turned on/off */
231
232 /* struct ata_queued_cmd flags */
233 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */
234 ATA_QCFLAG_DMAMAP = (1 << 1), /* SG table is DMA mapped */
235 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */
236 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */
237 ATA_QCFLAG_CLEAR_EXCL = (1 << 5), /* clear excl_link on completion */
238 ATA_QCFLAG_QUIET = (1 << 6), /* don't report device error */
239 ATA_QCFLAG_RETRY = (1 << 7), /* retry after failure */
240
241 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */
242 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */
243 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */
244
245 /* host set flags */
246 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */
247 ATA_HOST_STARTED = (1 << 1), /* Host started */
248 ATA_HOST_PARALLEL_SCAN = (1 << 2), /* Ports on this host can be scanned in parallel */
249
250 /* bits 24:31 of host->flags are reserved for LLD specific flags */
251
252 /* various lengths of time */
253 ATA_TMOUT_BOOT = 30000, /* heuristic */
254 ATA_TMOUT_BOOT_QUICK = 7000, /* heuristic */
255 ATA_TMOUT_INTERNAL_QUICK = 5000,
256 ATA_TMOUT_MAX_PARK = 30000,
257
258 /* FIXME: GoVault needs 2s but we can't afford that without
259 * parallel probing. 800ms is enough for iVDR disk
260 * HHD424020F7SV00. Increase to 2secs when parallel probing
261 * is in place.
262 */
263 ATA_TMOUT_FF_WAIT = 800,
264
265 /* Spec mandates to wait for ">= 2ms" before checking status
266 * after reset. We wait 150ms, because that was the magic
267 * delay used for ATAPI devices in Hale Landis's ATADRVR, for
268 * the period of time between when the ATA command register is
269 * written, and then status is checked. Because waiting for
270 * "a while" before checking status is fine, post SRST, we
271 * perform this magic delay here as well.
272 *
273 * Old drivers/ide uses the 2mS rule and then waits for ready.
274 */
275 ATA_WAIT_AFTER_RESET = 150,
276
277 /* If PMP is supported, we have to do follow-up SRST. As some
278 * PMPs don't send D2H Reg FIS after hardreset, LLDs are
279 * advised to wait only for the following duration before
280 * doing SRST.
281 */
282 ATA_TMOUT_PMP_SRST_WAIT = 5000,
283
284 /* ATA bus states */
285 BUS_UNKNOWN = 0,
286 BUS_DMA = 1,
287 BUS_IDLE = 2,
288 BUS_NOINTR = 3,
289 BUS_NODATA = 4,
290 BUS_TIMER = 5,
291 BUS_PIO = 6,
292 BUS_EDD = 7,
293 BUS_IDENTIFY = 8,
294 BUS_PACKET = 9,
295
296 /* SATA port states */
297 PORT_UNKNOWN = 0,
298 PORT_ENABLED = 1,
299 PORT_DISABLED = 2,
300
301 /* encoding various smaller bitmaps into a single
302 * unsigned long bitmap
303 */
304 ATA_NR_PIO_MODES = 7,
305 ATA_NR_MWDMA_MODES = 5,
306 ATA_NR_UDMA_MODES = 8,
307
308 ATA_SHIFT_PIO = 0,
309 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_NR_PIO_MODES,
310 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_NR_MWDMA_MODES,
311
312 /* size of buffer to pad xfers ending on unaligned boundaries */
313 ATA_DMA_PAD_SZ = 4,
314
315 /* ering size */
316 ATA_ERING_SIZE = 32,
317
318 /* return values for ->qc_defer */
319 ATA_DEFER_LINK = 1,
320 ATA_DEFER_PORT = 2,
321
322 /* desc_len for ata_eh_info and context */
323 ATA_EH_DESC_LEN = 80,
324
325 /* reset / recovery action types */
326 ATA_EH_REVALIDATE = (1 << 0),
327 ATA_EH_SOFTRESET = (1 << 1), /* meaningful only in ->prereset */
328 ATA_EH_HARDRESET = (1 << 2), /* meaningful only in ->prereset */
329 ATA_EH_RESET = ATA_EH_SOFTRESET | ATA_EH_HARDRESET,
330 ATA_EH_ENABLE_LINK = (1 << 3),
331 ATA_EH_LPM = (1 << 4), /* link power management action */
332 ATA_EH_PARK = (1 << 5), /* unload heads and stop I/O */
333
334 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE | ATA_EH_PARK,
335 ATA_EH_ALL_ACTIONS = ATA_EH_REVALIDATE | ATA_EH_RESET |
336 ATA_EH_ENABLE_LINK | ATA_EH_LPM,
337
338 /* ata_eh_info->flags */
339 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */
340 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */
341 ATA_EHI_QUIET = (1 << 3), /* be quiet */
342
343 ATA_EHI_DID_SOFTRESET = (1 << 16), /* already soft-reset this port */
344 ATA_EHI_DID_HARDRESET = (1 << 17), /* already soft-reset this port */
345 ATA_EHI_PRINTINFO = (1 << 18), /* print configuration info */
346 ATA_EHI_SETMODE = (1 << 19), /* configure transfer mode */
347 ATA_EHI_POST_SETMODE = (1 << 20), /* revaildating after setmode */
348
349 ATA_EHI_DID_RESET = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET,
350
351 /* mask of flags to transfer *to* the slave link */
352 ATA_EHI_TO_SLAVE_MASK = ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET,
353
354 /* max tries if error condition is still set after ->error_handler */
355 ATA_EH_MAX_TRIES = 5,
356
357 /* how hard are we gonna try to probe/recover devices */
358 ATA_PROBE_MAX_TRIES = 3,
359 ATA_EH_DEV_TRIES = 3,
360 ATA_EH_PMP_TRIES = 5,
361 ATA_EH_PMP_LINK_TRIES = 3,
362
363 SATA_PMP_RW_TIMEOUT = 3000, /* PMP read/write timeout */
364
365 /* This should match the actual table size of
366 * ata_eh_cmd_timeout_table in libata-eh.c.
367 */
368 ATA_EH_CMD_TIMEOUT_TABLE_SIZE = 5,
369
370 /* Horkage types. May be set by libata or controller on drives
371 (some horkage may be drive/controller pair dependant */
372
373 ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */
374 ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */
375 ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */
376 ATA_HORKAGE_MAX_SEC_128 = (1 << 3), /* Limit max sects to 128 */
377 ATA_HORKAGE_BROKEN_HPA = (1 << 4), /* Broken HPA */
378 ATA_HORKAGE_DISABLE = (1 << 5), /* Disable it */
379 ATA_HORKAGE_HPA_SIZE = (1 << 6), /* native size off by one */
380 ATA_HORKAGE_IPM = (1 << 7), /* Link PM problems */
381 ATA_HORKAGE_IVB = (1 << 8), /* cbl det validity bit bugs */
382 ATA_HORKAGE_STUCK_ERR = (1 << 9), /* stuck ERR on next PACKET */
383 ATA_HORKAGE_BRIDGE_OK = (1 << 10), /* no bridge limits */
384 ATA_HORKAGE_ATAPI_MOD16_DMA = (1 << 11), /* use ATAPI DMA for commands
385 not multiple of 16 bytes */
386 ATA_HORKAGE_FIRMWARE_WARN = (1 << 12), /* firmware update warning */
387 ATA_HORKAGE_1_5_GBPS = (1 << 13), /* force 1.5 Gbps */
388 ATA_HORKAGE_NOSETXFER = (1 << 14), /* skip SETXFER, SATA only */
389 ATA_HORKAGE_BROKEN_FPDMA_AA = (1 << 15), /* skip AA */
390
391 /* DMA mask for user DMA control: User visible values; DO NOT
392 renumber */
393 ATA_DMA_MASK_ATA = (1 << 0), /* DMA on ATA Disk */
394 ATA_DMA_MASK_ATAPI = (1 << 1), /* DMA on ATAPI */
395 ATA_DMA_MASK_CFA = (1 << 2), /* DMA on CF Card */
396
397 /* ATAPI command types */
398 ATAPI_READ = 0, /* READs */
399 ATAPI_WRITE = 1, /* WRITEs */
400 ATAPI_READ_CD = 2, /* READ CD [MSF] */
401 ATAPI_PASS_THRU = 3, /* SAT pass-thru */
402 ATAPI_MISC = 4, /* the rest */
403
404 /* Timing constants */
405 ATA_TIMING_SETUP = (1 << 0),
406 ATA_TIMING_ACT8B = (1 << 1),
407 ATA_TIMING_REC8B = (1 << 2),
408 ATA_TIMING_CYC8B = (1 << 3),
409 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
410 ATA_TIMING_CYC8B,
411 ATA_TIMING_ACTIVE = (1 << 4),
412 ATA_TIMING_RECOVER = (1 << 5),
413 ATA_TIMING_DMACK_HOLD = (1 << 6),
414 ATA_TIMING_CYCLE = (1 << 7),
415 ATA_TIMING_UDMA = (1 << 8),
416 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
417 ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
418 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
419 ATA_TIMING_DMACK_HOLD | ATA_TIMING_CYCLE |
420 ATA_TIMING_UDMA,
421 };
422
423 enum ata_xfer_mask {
424 ATA_MASK_PIO = ((1LU << ATA_NR_PIO_MODES) - 1)
425 << ATA_SHIFT_PIO,
426 ATA_MASK_MWDMA = ((1LU << ATA_NR_MWDMA_MODES) - 1)
427 << ATA_SHIFT_MWDMA,
428 ATA_MASK_UDMA = ((1LU << ATA_NR_UDMA_MODES) - 1)
429 << ATA_SHIFT_UDMA,
430 };
431
432 enum hsm_task_states {
433 HSM_ST_IDLE, /* no command on going */
434 HSM_ST_FIRST, /* (waiting the device to)
435 write CDB or first data block */
436 HSM_ST, /* (waiting the device to) transfer data */
437 HSM_ST_LAST, /* (waiting the device to) complete command */
438 HSM_ST_ERR, /* error */
439 };
440
441 enum ata_completion_errors {
442 AC_ERR_DEV = (1 << 0), /* device reported error */
443 AC_ERR_HSM = (1 << 1), /* host state machine violation */
444 AC_ERR_TIMEOUT = (1 << 2), /* timeout */
445 AC_ERR_MEDIA = (1 << 3), /* media error */
446 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */
447 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */
448 AC_ERR_SYSTEM = (1 << 6), /* system error */
449 AC_ERR_INVALID = (1 << 7), /* invalid argument */
450 AC_ERR_OTHER = (1 << 8), /* unknown */
451 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */
452 AC_ERR_NCQ = (1 << 10), /* marker for offending NCQ qc */
453 };
454
455 /* forward declarations */
456 struct scsi_device;
457 struct ata_port_operations;
458 struct ata_port;
459 struct ata_link;
460 struct ata_queued_cmd;
461
462 /* typedefs */
463 typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
464 typedef int (*ata_prereset_fn_t)(struct ata_link *link, unsigned long deadline);
465 typedef int (*ata_reset_fn_t)(struct ata_link *link, unsigned int *classes,
466 unsigned long deadline);
467 typedef void (*ata_postreset_fn_t)(struct ata_link *link, unsigned int *classes);
468
469 /*
470 * host pm policy: If you alter this, you also need to alter libata-scsi.c
471 * (for the ascii descriptions)
472 */
473 enum link_pm {
474 NOT_AVAILABLE,
475 MIN_POWER,
476 MAX_PERFORMANCE,
477 MEDIUM_POWER,
478 };
479 extern struct device_attribute dev_attr_link_power_management_policy;
480 extern struct device_attribute dev_attr_unload_heads;
481 extern struct device_attribute dev_attr_em_message_type;
482 extern struct device_attribute dev_attr_em_message;
483 extern struct device_attribute dev_attr_sw_activity;
484
485 enum sw_activity {
486 OFF,
487 BLINK_ON,
488 BLINK_OFF,
489 };
490
491 #ifdef CONFIG_ATA_SFF
492 struct ata_ioports {
493 void __iomem *cmd_addr;
494 void __iomem *data_addr;
495 void __iomem *error_addr;
496 void __iomem *feature_addr;
497 void __iomem *nsect_addr;
498 void __iomem *lbal_addr;
499 void __iomem *lbam_addr;
500 void __iomem *lbah_addr;
501 void __iomem *device_addr;
502 void __iomem *status_addr;
503 void __iomem *command_addr;
504 void __iomem *altstatus_addr;
505 void __iomem *ctl_addr;
506 void __iomem *bmdma_addr;
507 void __iomem *scr_addr;
508 };
509 #endif /* CONFIG_ATA_SFF */
510
511 struct ata_host {
512 spinlock_t lock;
513 struct device *dev;
514 void __iomem * const *iomap;
515 unsigned int n_ports;
516 void *private_data;
517 struct ata_port_operations *ops;
518 unsigned long flags;
519 #ifdef CONFIG_ATA_ACPI
520 acpi_handle acpi_handle;
521 #endif
522 struct ata_port *simplex_claimed; /* channel owning the DMA */
523 struct ata_port *ports[0];
524 };
525
526 struct ata_queued_cmd {
527 struct ata_port *ap;
528 struct ata_device *dev;
529
530 struct scsi_cmnd *scsicmd;
531 void (*scsidone)(struct scsi_cmnd *);
532
533 struct ata_taskfile tf;
534 u8 cdb[ATAPI_CDB_LEN];
535
536 unsigned long flags; /* ATA_QCFLAG_xxx */
537 unsigned int tag;
538 unsigned int n_elem;
539 unsigned int orig_n_elem;
540
541 int dma_dir;
542
543 unsigned int sect_size;
544
545 unsigned int nbytes;
546 unsigned int extrabytes;
547 unsigned int curbytes;
548
549 struct scatterlist *cursg;
550 unsigned int cursg_ofs;
551
552 struct scatterlist sgent;
553
554 struct scatterlist *sg;
555
556 unsigned int err_mask;
557 struct ata_taskfile result_tf;
558 ata_qc_cb_t complete_fn;
559
560 void *private_data;
561 void *lldd_task;
562 };
563
564 struct ata_port_stats {
565 unsigned long unhandled_irq;
566 unsigned long idle_irq;
567 unsigned long rw_reqbuf;
568 };
569
570 struct ata_ering_entry {
571 unsigned int eflags;
572 unsigned int err_mask;
573 u64 timestamp;
574 };
575
576 struct ata_ering {
577 int cursor;
578 struct ata_ering_entry ring[ATA_ERING_SIZE];
579 };
580
581 struct ata_device {
582 struct ata_link *link;
583 unsigned int devno; /* 0 or 1 */
584 unsigned int horkage; /* List of broken features */
585 unsigned long flags; /* ATA_DFLAG_xxx */
586 struct scsi_device *sdev; /* attached SCSI device */
587 #ifdef CONFIG_ATA_ACPI
588 acpi_handle acpi_handle;
589 union acpi_object *gtf_cache;
590 #endif
591 /* n_sector is CLEAR_BEGIN, read comment above CLEAR_BEGIN */
592 u64 n_sectors; /* size of device, if ATA */
593 u64 n_native_sectors; /* native size, if ATA */
594 unsigned int class; /* ATA_DEV_xxx */
595 unsigned long unpark_deadline;
596
597 u8 pio_mode;
598 u8 dma_mode;
599 u8 xfer_mode;
600 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
601
602 unsigned int multi_count; /* sectors count for
603 READ/WRITE MULTIPLE */
604 unsigned int max_sectors; /* per-device max sectors */
605 unsigned int cdb_len;
606
607 /* per-dev xfer mask */
608 unsigned long pio_mask;
609 unsigned long mwdma_mask;
610 unsigned long udma_mask;
611
612 /* for CHS addressing */
613 u16 cylinders; /* Number of cylinders */
614 u16 heads; /* Number of heads */
615 u16 sectors; /* Number of sectors per track */
616
617 union {
618 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
619 u32 gscr[SATA_PMP_GSCR_DWORDS]; /* PMP GSCR block */
620 };
621
622 /* error history */
623 int spdn_cnt;
624 /* ering is CLEAR_END, read comment above CLEAR_END */
625 struct ata_ering ering;
626 };
627
628 /* Fields between ATA_DEVICE_CLEAR_BEGIN and ATA_DEVICE_CLEAR_END are
629 * cleared to zero on ata_dev_init().
630 */
631 #define ATA_DEVICE_CLEAR_BEGIN offsetof(struct ata_device, n_sectors)
632 #define ATA_DEVICE_CLEAR_END offsetof(struct ata_device, ering)
633
634 struct ata_eh_info {
635 struct ata_device *dev; /* offending device */
636 u32 serror; /* SError from LLDD */
637 unsigned int err_mask; /* port-wide err_mask */
638 unsigned int action; /* ATA_EH_* action mask */
639 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */
640 unsigned int flags; /* ATA_EHI_* flags */
641
642 unsigned int probe_mask;
643
644 char desc[ATA_EH_DESC_LEN];
645 int desc_len;
646 };
647
648 struct ata_eh_context {
649 struct ata_eh_info i;
650 int tries[ATA_MAX_DEVICES];
651 int cmd_timeout_idx[ATA_MAX_DEVICES]
652 [ATA_EH_CMD_TIMEOUT_TABLE_SIZE];
653 unsigned int classes[ATA_MAX_DEVICES];
654 unsigned int did_probe_mask;
655 unsigned int unloaded_mask;
656 unsigned int saved_ncq_enabled;
657 u8 saved_xfer_mode[ATA_MAX_DEVICES];
658 /* timestamp for the last reset attempt or success */
659 unsigned long last_reset;
660 };
661
662 struct ata_acpi_drive
663 {
664 u32 pio;
665 u32 dma;
666 } __packed;
667
668 struct ata_acpi_gtm {
669 struct ata_acpi_drive drive[2];
670 u32 flags;
671 } __packed;
672
673 struct ata_link {
674 struct ata_port *ap;
675 int pmp; /* port multiplier port # */
676
677 unsigned int active_tag; /* active tag on this link */
678 u32 sactive; /* active NCQ commands */
679
680 unsigned int flags; /* ATA_LFLAG_xxx */
681
682 u32 saved_scontrol; /* SControl on probe */
683 unsigned int hw_sata_spd_limit;
684 unsigned int sata_spd_limit;
685 unsigned int sata_spd; /* current SATA PHY speed */
686
687 /* record runtime error info, protected by host_set lock */
688 struct ata_eh_info eh_info;
689 /* EH context */
690 struct ata_eh_context eh_context;
691
692 struct ata_device device[ATA_MAX_DEVICES];
693 };
694
695 struct ata_port {
696 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */
697 struct ata_port_operations *ops;
698 spinlock_t *lock;
699 /* Flags owned by the EH context. Only EH should touch these once the
700 port is active */
701 unsigned long flags; /* ATA_FLAG_xxx */
702 /* Flags that change dynamically, protected by ap->lock */
703 unsigned int pflags; /* ATA_PFLAG_xxx */
704 unsigned int print_id; /* user visible unique port ID */
705 unsigned int port_no; /* 0 based port no. inside the host */
706
707 struct ata_prd *prd; /* our SG list */
708 dma_addr_t prd_dma; /* and its DMA mapping */
709
710 #ifdef CONFIG_ATA_SFF
711 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
712 #endif /* CONFIG_ATA_SFF */
713
714 u8 ctl; /* cache of ATA control register */
715 u8 last_ctl; /* Cache last written value */
716 unsigned int pio_mask;
717 unsigned int mwdma_mask;
718 unsigned int udma_mask;
719 unsigned int cbl; /* cable type; ATA_CBL_xxx */
720
721 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
722 unsigned long qc_allocated;
723 unsigned int qc_active;
724 int nr_active_links; /* #links with active qcs */
725
726 struct ata_link link; /* host default link */
727 struct ata_link *slave_link; /* see ata_slave_link_init() */
728
729 int nr_pmp_links; /* nr of available PMP links */
730 struct ata_link *pmp_link; /* array of PMP links */
731 struct ata_link *excl_link; /* for PMP qc exclusion */
732
733 struct ata_port_stats stats;
734 struct ata_host *host;
735 struct device *dev;
736
737 void *port_task_data;
738 struct delayed_work port_task;
739 struct delayed_work hotplug_task;
740 struct work_struct scsi_rescan_task;
741
742 unsigned int hsm_task_state;
743
744 u32 msg_enable;
745 struct list_head eh_done_q;
746 wait_queue_head_t eh_wait_q;
747 int eh_tries;
748 struct completion park_req_pending;
749
750 pm_message_t pm_mesg;
751 int *pm_result;
752 enum link_pm pm_policy;
753
754 struct timer_list fastdrain_timer;
755 unsigned long fastdrain_cnt;
756
757 int em_message_type;
758 void *private_data;
759
760 #ifdef CONFIG_ATA_ACPI
761 acpi_handle acpi_handle;
762 struct ata_acpi_gtm __acpi_init_gtm; /* use ata_acpi_init_gtm() */
763 #endif
764 /* owned by EH */
765 u8 sector_buf[ATA_SECT_SIZE] ____cacheline_aligned;
766 };
767
768 /* The following initializer overrides a method to NULL whether one of
769 * its parent has the method defined or not. This is equivalent to
770 * ERR_PTR(-ENOENT). Unfortunately, ERR_PTR doesn't render a constant
771 * expression and thus can't be used as an initializer.
772 */
773 #define ATA_OP_NULL (void *)(unsigned long)(-ENOENT)
774
775 struct ata_port_operations {
776 /*
777 * Command execution
778 */
779 int (*qc_defer)(struct ata_queued_cmd *qc);
780 int (*check_atapi_dma)(struct ata_queued_cmd *qc);
781 void (*qc_prep)(struct ata_queued_cmd *qc);
782 unsigned int (*qc_issue)(struct ata_queued_cmd *qc);
783 bool (*qc_fill_rtf)(struct ata_queued_cmd *qc);
784
785 /*
786 * Configuration and exception handling
787 */
788 int (*cable_detect)(struct ata_port *ap);
789 unsigned long (*mode_filter)(struct ata_device *dev, unsigned long xfer_mask);
790 void (*set_piomode)(struct ata_port *ap, struct ata_device *dev);
791 void (*set_dmamode)(struct ata_port *ap, struct ata_device *dev);
792 int (*set_mode)(struct ata_link *link, struct ata_device **r_failed_dev);
793 unsigned int (*read_id)(struct ata_device *dev, struct ata_taskfile *tf, u16 *id);
794
795 void (*dev_config)(struct ata_device *dev);
796
797 void (*freeze)(struct ata_port *ap);
798 void (*thaw)(struct ata_port *ap);
799 ata_prereset_fn_t prereset;
800 ata_reset_fn_t softreset;
801 ata_reset_fn_t hardreset;
802 ata_postreset_fn_t postreset;
803 ata_prereset_fn_t pmp_prereset;
804 ata_reset_fn_t pmp_softreset;
805 ata_reset_fn_t pmp_hardreset;
806 ata_postreset_fn_t pmp_postreset;
807 void (*error_handler)(struct ata_port *ap);
808 void (*lost_interrupt)(struct ata_port *ap);
809 void (*post_internal_cmd)(struct ata_queued_cmd *qc);
810
811 /*
812 * Optional features
813 */
814 int (*scr_read)(struct ata_link *link, unsigned int sc_reg, u32 *val);
815 int (*scr_write)(struct ata_link *link, unsigned int sc_reg, u32 val);
816 void (*pmp_attach)(struct ata_port *ap);
817 void (*pmp_detach)(struct ata_port *ap);
818 int (*enable_pm)(struct ata_port *ap, enum link_pm policy);
819 void (*disable_pm)(struct ata_port *ap);
820
821 /*
822 * Start, stop, suspend and resume
823 */
824 int (*port_suspend)(struct ata_port *ap, pm_message_t mesg);
825 int (*port_resume)(struct ata_port *ap);
826 int (*port_start)(struct ata_port *ap);
827 void (*port_stop)(struct ata_port *ap);
828 void (*host_stop)(struct ata_host *host);
829
830 #ifdef CONFIG_ATA_SFF
831 /*
832 * SFF / taskfile oriented ops
833 */
834 void (*sff_dev_select)(struct ata_port *ap, unsigned int device);
835 u8 (*sff_check_status)(struct ata_port *ap);
836 u8 (*sff_check_altstatus)(struct ata_port *ap);
837 void (*sff_tf_load)(struct ata_port *ap, const struct ata_taskfile *tf);
838 void (*sff_tf_read)(struct ata_port *ap, struct ata_taskfile *tf);
839 void (*sff_exec_command)(struct ata_port *ap,
840 const struct ata_taskfile *tf);
841 unsigned int (*sff_data_xfer)(struct ata_device *dev,
842 unsigned char *buf, unsigned int buflen, int rw);
843 u8 (*sff_irq_on)(struct ata_port *);
844 void (*sff_irq_clear)(struct ata_port *);
845
846 void (*bmdma_setup)(struct ata_queued_cmd *qc);
847 void (*bmdma_start)(struct ata_queued_cmd *qc);
848 void (*bmdma_stop)(struct ata_queued_cmd *qc);
849 u8 (*bmdma_status)(struct ata_port *ap);
850
851 void (*drain_fifo)(struct ata_queued_cmd *qc);
852 #endif /* CONFIG_ATA_SFF */
853
854 ssize_t (*em_show)(struct ata_port *ap, char *buf);
855 ssize_t (*em_store)(struct ata_port *ap, const char *message,
856 size_t size);
857 ssize_t (*sw_activity_show)(struct ata_device *dev, char *buf);
858 ssize_t (*sw_activity_store)(struct ata_device *dev,
859 enum sw_activity val);
860 /*
861 * Obsolete
862 */
863 void (*phy_reset)(struct ata_port *ap);
864 void (*eng_timeout)(struct ata_port *ap);
865
866 /*
867 * ->inherits must be the last field and all the preceding
868 * fields must be pointers.
869 */
870 const struct ata_port_operations *inherits;
871 };
872
873 struct ata_port_info {
874 unsigned long flags;
875 unsigned long link_flags;
876 unsigned long pio_mask;
877 unsigned long mwdma_mask;
878 unsigned long udma_mask;
879 struct ata_port_operations *port_ops;
880 void *private_data;
881 };
882
883 struct ata_timing {
884 unsigned short mode; /* ATA mode */
885 unsigned short setup; /* t1 */
886 unsigned short act8b; /* t2 for 8-bit I/O */
887 unsigned short rec8b; /* t2i for 8-bit I/O */
888 unsigned short cyc8b; /* t0 for 8-bit I/O */
889 unsigned short active; /* t2 or tD */
890 unsigned short recover; /* t2i or tK */
891 unsigned short dmack_hold; /* tj */
892 unsigned short cycle; /* t0 */
893 unsigned short udma; /* t2CYCTYP/2 */
894 };
895
896 /*
897 * Core layer - drivers/ata/libata-core.c
898 */
899 extern const unsigned long sata_deb_timing_normal[];
900 extern const unsigned long sata_deb_timing_hotplug[];
901 extern const unsigned long sata_deb_timing_long[];
902
903 extern struct ata_port_operations ata_dummy_port_ops;
904 extern const struct ata_port_info ata_dummy_port_info;
905
906 static inline const unsigned long *
907 sata_ehc_deb_timing(struct ata_eh_context *ehc)
908 {
909 if (ehc->i.flags & ATA_EHI_HOTPLUGGED)
910 return sata_deb_timing_hotplug;
911 else
912 return sata_deb_timing_normal;
913 }
914
915 static inline int ata_port_is_dummy(struct ata_port *ap)
916 {
917 return ap->ops == &ata_dummy_port_ops;
918 }
919
920 extern void ata_port_probe(struct ata_port *);
921 extern int sata_set_spd(struct ata_link *link);
922 extern int ata_std_prereset(struct ata_link *link, unsigned long deadline);
923 extern int ata_wait_after_reset(struct ata_link *link, unsigned long deadline,
924 int (*check_ready)(struct ata_link *link));
925 extern int sata_link_debounce(struct ata_link *link,
926 const unsigned long *params, unsigned long deadline);
927 extern int sata_link_resume(struct ata_link *link, const unsigned long *params,
928 unsigned long deadline);
929 extern int sata_link_hardreset(struct ata_link *link,
930 const unsigned long *timing, unsigned long deadline,
931 bool *online, int (*check_ready)(struct ata_link *));
932 extern int sata_std_hardreset(struct ata_link *link, unsigned int *class,
933 unsigned long deadline);
934 extern void ata_std_postreset(struct ata_link *link, unsigned int *classes);
935 extern void ata_port_disable(struct ata_port *);
936
937 extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports);
938 extern struct ata_host *ata_host_alloc_pinfo(struct device *dev,
939 const struct ata_port_info * const * ppi, int n_ports);
940 extern int ata_slave_link_init(struct ata_port *ap);
941 extern int ata_host_start(struct ata_host *host);
942 extern int ata_host_register(struct ata_host *host,
943 struct scsi_host_template *sht);
944 extern int ata_host_activate(struct ata_host *host, int irq,
945 irq_handler_t irq_handler, unsigned long irq_flags,
946 struct scsi_host_template *sht);
947 extern void ata_host_detach(struct ata_host *host);
948 extern void ata_host_init(struct ata_host *, struct device *,
949 unsigned long, struct ata_port_operations *);
950 extern int ata_scsi_detect(struct scsi_host_template *sht);
951 extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
952 extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *));
953 extern int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *dev,
954 int cmd, void __user *arg);
955 extern void ata_sas_port_destroy(struct ata_port *);
956 extern struct ata_port *ata_sas_port_alloc(struct ata_host *,
957 struct ata_port_info *, struct Scsi_Host *);
958 extern int ata_sas_port_init(struct ata_port *);
959 extern int ata_sas_port_start(struct ata_port *ap);
960 extern void ata_sas_port_stop(struct ata_port *ap);
961 extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *);
962 extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
963 struct ata_port *ap);
964 extern int sata_scr_valid(struct ata_link *link);
965 extern int sata_scr_read(struct ata_link *link, int reg, u32 *val);
966 extern int sata_scr_write(struct ata_link *link, int reg, u32 val);
967 extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val);
968 extern bool ata_link_online(struct ata_link *link);
969 extern bool ata_link_offline(struct ata_link *link);
970 #ifdef CONFIG_PM
971 extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg);
972 extern void ata_host_resume(struct ata_host *host);
973 #endif
974 extern int ata_ratelimit(void);
975 extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
976 unsigned long interval, unsigned long timeout);
977 extern int atapi_cmd_type(u8 opcode);
978 extern void ata_tf_to_fis(const struct ata_taskfile *tf,
979 u8 pmp, int is_cmd, u8 *fis);
980 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
981 extern unsigned long ata_pack_xfermask(unsigned long pio_mask,
982 unsigned long mwdma_mask, unsigned long udma_mask);
983 extern void ata_unpack_xfermask(unsigned long xfer_mask,
984 unsigned long *pio_mask, unsigned long *mwdma_mask,
985 unsigned long *udma_mask);
986 extern u8 ata_xfer_mask2mode(unsigned long xfer_mask);
987 extern unsigned long ata_xfer_mode2mask(u8 xfer_mode);
988 extern int ata_xfer_mode2shift(unsigned long xfer_mode);
989 extern const char *ata_mode_string(unsigned long xfer_mask);
990 extern unsigned long ata_id_xfermask(const u16 *id);
991 extern int ata_port_start(struct ata_port *ap);
992 extern int ata_std_qc_defer(struct ata_queued_cmd *qc);
993 extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
994 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
995 unsigned int n_elem);
996 extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
997 extern void ata_dev_disable(struct ata_device *adev);
998 extern void ata_id_string(const u16 *id, unsigned char *s,
999 unsigned int ofs, unsigned int len);
1000 extern void ata_id_c_string(const u16 *id, unsigned char *s,
1001 unsigned int ofs, unsigned int len);
1002 extern unsigned int ata_do_dev_read_id(struct ata_device *dev,
1003 struct ata_taskfile *tf, u16 *id);
1004 extern void ata_qc_complete(struct ata_queued_cmd *qc);
1005 extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active);
1006 extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
1007 void (*done)(struct scsi_cmnd *));
1008 extern int ata_std_bios_param(struct scsi_device *sdev,
1009 struct block_device *bdev,
1010 sector_t capacity, int geom[]);
1011 extern int ata_scsi_slave_config(struct scsi_device *sdev);
1012 extern void ata_scsi_slave_destroy(struct scsi_device *sdev);
1013 extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
1014 int queue_depth);
1015 extern struct ata_device *ata_dev_pair(struct ata_device *adev);
1016 extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev);
1017
1018 extern int ata_cable_40wire(struct ata_port *ap);
1019 extern int ata_cable_80wire(struct ata_port *ap);
1020 extern int ata_cable_sata(struct ata_port *ap);
1021 extern int ata_cable_ignore(struct ata_port *ap);
1022 extern int ata_cable_unknown(struct ata_port *ap);
1023
1024 extern void ata_pio_queue_task(struct ata_port *ap, void *data,
1025 unsigned long delay);
1026
1027 /* Timing helpers */
1028 extern unsigned int ata_pio_need_iordy(const struct ata_device *);
1029 extern const struct ata_timing *ata_timing_find_mode(u8 xfer_mode);
1030 extern int ata_timing_compute(struct ata_device *, unsigned short,
1031 struct ata_timing *, int, int);
1032 extern void ata_timing_merge(const struct ata_timing *,
1033 const struct ata_timing *, struct ata_timing *,
1034 unsigned int);
1035 extern u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle);
1036
1037 /* PCI */
1038 #ifdef CONFIG_PCI
1039 struct pci_dev;
1040
1041 struct pci_bits {
1042 unsigned int reg; /* PCI config register to read */
1043 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
1044 unsigned long mask;
1045 unsigned long val;
1046 };
1047
1048 extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
1049 extern void ata_pci_remove_one(struct pci_dev *pdev);
1050
1051 #ifdef CONFIG_PM
1052 extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg);
1053 extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev);
1054 extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
1055 extern int ata_pci_device_resume(struct pci_dev *pdev);
1056 #endif /* CONFIG_PM */
1057 #endif /* CONFIG_PCI */
1058
1059 /*
1060 * ACPI - drivers/ata/libata-acpi.c
1061 */
1062 #ifdef CONFIG_ATA_ACPI
1063 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
1064 {
1065 if (ap->pflags & ATA_PFLAG_INIT_GTM_VALID)
1066 return &ap->__acpi_init_gtm;
1067 return NULL;
1068 }
1069 int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm);
1070 int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *stm);
1071 unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev,
1072 const struct ata_acpi_gtm *gtm);
1073 int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm);
1074 #else
1075 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
1076 {
1077 return NULL;
1078 }
1079
1080 static inline int ata_acpi_stm(const struct ata_port *ap,
1081 struct ata_acpi_gtm *stm)
1082 {
1083 return -ENOSYS;
1084 }
1085
1086 static inline int ata_acpi_gtm(const struct ata_port *ap,
1087 struct ata_acpi_gtm *stm)
1088 {
1089 return -ENOSYS;
1090 }
1091
1092 static inline unsigned int ata_acpi_gtm_xfermask(struct ata_device *dev,
1093 const struct ata_acpi_gtm *gtm)
1094 {
1095 return 0;
1096 }
1097
1098 static inline int ata_acpi_cbl_80wire(struct ata_port *ap,
1099 const struct ata_acpi_gtm *gtm)
1100 {
1101 return 0;
1102 }
1103 #endif
1104
1105 /*
1106 * EH - drivers/ata/libata-eh.c
1107 */
1108 extern void ata_port_schedule_eh(struct ata_port *ap);
1109 extern int ata_link_abort(struct ata_link *link);
1110 extern int ata_port_abort(struct ata_port *ap);
1111 extern int ata_port_freeze(struct ata_port *ap);
1112 extern int sata_async_notification(struct ata_port *ap);
1113
1114 extern void ata_eh_freeze_port(struct ata_port *ap);
1115 extern void ata_eh_thaw_port(struct ata_port *ap);
1116
1117 extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
1118 extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
1119 extern void ata_eh_analyze_ncq_error(struct ata_link *link);
1120
1121 extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
1122 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
1123 ata_postreset_fn_t postreset);
1124 extern void ata_std_error_handler(struct ata_port *ap);
1125
1126 /*
1127 * Base operations to inherit from and initializers for sht
1128 *
1129 * Operations
1130 *
1131 * base : Common to all libata drivers.
1132 * sata : SATA controllers w/ native interface.
1133 * pmp : SATA controllers w/ PMP support.
1134 * sff : SFF ATA controllers w/o BMDMA support.
1135 * bmdma : SFF ATA controllers w/ BMDMA support.
1136 *
1137 * sht initializers
1138 *
1139 * BASE : Common to all libata drivers. The user must set
1140 * sg_tablesize and dma_boundary.
1141 * PIO : SFF ATA controllers w/ only PIO support.
1142 * BMDMA : SFF ATA controllers w/ BMDMA support. sg_tablesize and
1143 * dma_boundary are set to BMDMA limits.
1144 * NCQ : SATA controllers supporting NCQ. The user must set
1145 * sg_tablesize, dma_boundary and can_queue.
1146 */
1147 extern const struct ata_port_operations ata_base_port_ops;
1148 extern const struct ata_port_operations sata_port_ops;
1149 extern struct device_attribute *ata_common_sdev_attrs[];
1150
1151 #define ATA_BASE_SHT(drv_name) \
1152 .module = THIS_MODULE, \
1153 .name = drv_name, \
1154 .ioctl = ata_scsi_ioctl, \
1155 .queuecommand = ata_scsi_queuecmd, \
1156 .can_queue = ATA_DEF_QUEUE, \
1157 .this_id = ATA_SHT_THIS_ID, \
1158 .cmd_per_lun = ATA_SHT_CMD_PER_LUN, \
1159 .emulated = ATA_SHT_EMULATED, \
1160 .use_clustering = ATA_SHT_USE_CLUSTERING, \
1161 .proc_name = drv_name, \
1162 .slave_configure = ata_scsi_slave_config, \
1163 .slave_destroy = ata_scsi_slave_destroy, \
1164 .bios_param = ata_std_bios_param, \
1165 .sdev_attrs = ata_common_sdev_attrs
1166
1167 #define ATA_NCQ_SHT(drv_name) \
1168 ATA_BASE_SHT(drv_name), \
1169 .change_queue_depth = ata_scsi_change_queue_depth
1170
1171 /*
1172 * PMP helpers
1173 */
1174 #ifdef CONFIG_SATA_PMP
1175 static inline bool sata_pmp_supported(struct ata_port *ap)
1176 {
1177 return ap->flags & ATA_FLAG_PMP;
1178 }
1179
1180 static inline bool sata_pmp_attached(struct ata_port *ap)
1181 {
1182 return ap->nr_pmp_links != 0;
1183 }
1184
1185 static inline int ata_is_host_link(const struct ata_link *link)
1186 {
1187 return link == &link->ap->link || link == link->ap->slave_link;
1188 }
1189 #else /* CONFIG_SATA_PMP */
1190 static inline bool sata_pmp_supported(struct ata_port *ap)
1191 {
1192 return false;
1193 }
1194
1195 static inline bool sata_pmp_attached(struct ata_port *ap)
1196 {
1197 return false;
1198 }
1199
1200 static inline int ata_is_host_link(const struct ata_link *link)
1201 {
1202 return 1;
1203 }
1204 #endif /* CONFIG_SATA_PMP */
1205
1206 static inline int sata_srst_pmp(struct ata_link *link)
1207 {
1208 if (sata_pmp_supported(link->ap) && ata_is_host_link(link))
1209 return SATA_PMP_CTRL_PORT;
1210 return link->pmp;
1211 }
1212
1213 /*
1214 * printk helpers
1215 */
1216 #define ata_port_printk(ap, lv, fmt, args...) \
1217 printk("%sata%u: "fmt, lv, (ap)->print_id , ##args)
1218
1219 #define ata_link_printk(link, lv, fmt, args...) do { \
1220 if (sata_pmp_attached((link)->ap) || (link)->ap->slave_link) \
1221 printk("%sata%u.%02u: "fmt, lv, (link)->ap->print_id, \
1222 (link)->pmp , ##args); \
1223 else \
1224 printk("%sata%u: "fmt, lv, (link)->ap->print_id , ##args); \
1225 } while(0)
1226
1227 #define ata_dev_printk(dev, lv, fmt, args...) \
1228 printk("%sata%u.%02u: "fmt, lv, (dev)->link->ap->print_id, \
1229 (dev)->link->pmp + (dev)->devno , ##args)
1230
1231 /*
1232 * ata_eh_info helpers
1233 */
1234 extern void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...)
1235 __attribute__ ((format (printf, 2, 3)));
1236 extern void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...)
1237 __attribute__ ((format (printf, 2, 3)));
1238 extern void ata_ehi_clear_desc(struct ata_eh_info *ehi);
1239
1240 static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
1241 {
1242 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
1243 ehi->flags |= ATA_EHI_HOTPLUGGED;
1244 ehi->action |= ATA_EH_RESET | ATA_EH_ENABLE_LINK;
1245 ehi->err_mask |= AC_ERR_ATA_BUS;
1246 }
1247
1248 /*
1249 * port description helpers
1250 */
1251 extern void ata_port_desc(struct ata_port *ap, const char *fmt, ...)
1252 __attribute__ ((format (printf, 2, 3)));
1253 #ifdef CONFIG_PCI
1254 extern void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset,
1255 const char *name);
1256 #endif
1257
1258 static inline unsigned int ata_tag_valid(unsigned int tag)
1259 {
1260 return (tag < ATA_MAX_QUEUE) ? 1 : 0;
1261 }
1262
1263 static inline unsigned int ata_tag_internal(unsigned int tag)
1264 {
1265 return tag == ATA_TAG_INTERNAL;
1266 }
1267
1268 /*
1269 * device helpers
1270 */
1271 static inline unsigned int ata_class_enabled(unsigned int class)
1272 {
1273 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI ||
1274 class == ATA_DEV_PMP || class == ATA_DEV_SEMB;
1275 }
1276
1277 static inline unsigned int ata_class_disabled(unsigned int class)
1278 {
1279 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP ||
1280 class == ATA_DEV_PMP_UNSUP || class == ATA_DEV_SEMB_UNSUP;
1281 }
1282
1283 static inline unsigned int ata_class_absent(unsigned int class)
1284 {
1285 return !ata_class_enabled(class) && !ata_class_disabled(class);
1286 }
1287
1288 static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
1289 {
1290 return ata_class_enabled(dev->class);
1291 }
1292
1293 static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
1294 {
1295 return ata_class_disabled(dev->class);
1296 }
1297
1298 static inline unsigned int ata_dev_absent(const struct ata_device *dev)
1299 {
1300 return ata_class_absent(dev->class);
1301 }
1302
1303 /*
1304 * link helpers
1305 */
1306 static inline int ata_link_max_devices(const struct ata_link *link)
1307 {
1308 if (ata_is_host_link(link) && link->ap->flags & ATA_FLAG_SLAVE_POSS)
1309 return 2;
1310 return 1;
1311 }
1312
1313 static inline int ata_link_active(struct ata_link *link)
1314 {
1315 return ata_tag_valid(link->active_tag) || link->sactive;
1316 }
1317
1318 /*
1319 * Iterators
1320 *
1321 * ATA_LITER_* constants are used to select link iteration mode and
1322 * ATA_DITER_* device iteration mode.
1323 *
1324 * For a custom iteration directly using ata_{link|dev}_next(), if
1325 * @link or @dev, respectively, is NULL, the first element is
1326 * returned. @dev and @link can be any valid device or link and the
1327 * next element according to the iteration mode will be returned.
1328 * After the last element, NULL is returned.
1329 */
1330 enum ata_link_iter_mode {
1331 ATA_LITER_EDGE, /* if present, PMP links only; otherwise,
1332 * host link. no slave link */
1333 ATA_LITER_HOST_FIRST, /* host link followed by PMP or slave links */
1334 ATA_LITER_PMP_FIRST, /* PMP links followed by host link,
1335 * slave link still comes after host link */
1336 };
1337
1338 enum ata_dev_iter_mode {
1339 ATA_DITER_ENABLED,
1340 ATA_DITER_ENABLED_REVERSE,
1341 ATA_DITER_ALL,
1342 ATA_DITER_ALL_REVERSE,
1343 };
1344
1345 extern struct ata_link *ata_link_next(struct ata_link *link,
1346 struct ata_port *ap,
1347 enum ata_link_iter_mode mode);
1348
1349 extern struct ata_device *ata_dev_next(struct ata_device *dev,
1350 struct ata_link *link,
1351 enum ata_dev_iter_mode mode);
1352
1353 /*
1354 * Shortcut notation for iterations
1355 *
1356 * ata_for_each_link() iterates over each link of @ap according to
1357 * @mode. @link points to the current link in the loop. @link is
1358 * NULL after loop termination. ata_for_each_dev() works the same way
1359 * except that it iterates over each device of @link.
1360 *
1361 * Note that the mode prefixes ATA_{L|D}ITER_ shouldn't need to be
1362 * specified when using the following shorthand notations. Only the
1363 * mode itself (EDGE, HOST_FIRST, ENABLED, etc...) should be
1364 * specified. This not only increases brevity but also makes it
1365 * impossible to use ATA_LITER_* for device iteration or vice-versa.
1366 */
1367 #define ata_for_each_link(link, ap, mode) \
1368 for ((link) = ata_link_next(NULL, (ap), ATA_LITER_##mode); (link); \
1369 (link) = ata_link_next((link), (ap), ATA_LITER_##mode))
1370
1371 #define ata_for_each_dev(dev, link, mode) \
1372 for ((dev) = ata_dev_next(NULL, (link), ATA_DITER_##mode); (dev); \
1373 (dev) = ata_dev_next((dev), (link), ATA_DITER_##mode))
1374
1375 /**
1376 * ata_ncq_enabled - Test whether NCQ is enabled
1377 * @dev: ATA device to test for
1378 *
1379 * LOCKING:
1380 * spin_lock_irqsave(host lock)
1381 *
1382 * RETURNS:
1383 * 1 if NCQ is enabled for @dev, 0 otherwise.
1384 */
1385 static inline int ata_ncq_enabled(struct ata_device *dev)
1386 {
1387 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF |
1388 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ;
1389 }
1390
1391 static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
1392 {
1393 qc->tf.ctl |= ATA_NIEN;
1394 }
1395
1396 static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap,
1397 unsigned int tag)
1398 {
1399 if (likely(ata_tag_valid(tag)))
1400 return &ap->qcmd[tag];
1401 return NULL;
1402 }
1403
1404 static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap,
1405 unsigned int tag)
1406 {
1407 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
1408
1409 if (unlikely(!qc) || !ap->ops->error_handler)
1410 return qc;
1411
1412 if ((qc->flags & (ATA_QCFLAG_ACTIVE |
1413 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE)
1414 return qc;
1415
1416 return NULL;
1417 }
1418
1419 static inline unsigned int ata_qc_raw_nbytes(struct ata_queued_cmd *qc)
1420 {
1421 return qc->nbytes - min(qc->extrabytes, qc->nbytes);
1422 }
1423
1424 static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
1425 {
1426 memset(tf, 0, sizeof(*tf));
1427
1428 tf->ctl = dev->link->ap->ctl;
1429 if (dev->devno == 0)
1430 tf->device = ATA_DEVICE_OBS;
1431 else
1432 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
1433 }
1434
1435 static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
1436 {
1437 qc->dma_dir = DMA_NONE;
1438 qc->sg = NULL;
1439 qc->flags = 0;
1440 qc->cursg = NULL;
1441 qc->cursg_ofs = 0;
1442 qc->nbytes = qc->extrabytes = qc->curbytes = 0;
1443 qc->n_elem = 0;
1444 qc->err_mask = 0;
1445 qc->sect_size = ATA_SECT_SIZE;
1446
1447 ata_tf_init(qc->dev, &qc->tf);
1448
1449 /* init result_tf such that it indicates normal completion */
1450 qc->result_tf.command = ATA_DRDY;
1451 qc->result_tf.feature = 0;
1452 }
1453
1454 static inline int ata_try_flush_cache(const struct ata_device *dev)
1455 {
1456 return ata_id_wcache_enabled(dev->id) ||
1457 ata_id_has_flush(dev->id) ||
1458 ata_id_has_flush_ext(dev->id);
1459 }
1460
1461 static inline unsigned int ac_err_mask(u8 status)
1462 {
1463 if (status & (ATA_BUSY | ATA_DRQ))
1464 return AC_ERR_HSM;
1465 if (status & (ATA_ERR | ATA_DF))
1466 return AC_ERR_DEV;
1467 return 0;
1468 }
1469
1470 static inline unsigned int __ac_err_mask(u8 status)
1471 {
1472 unsigned int mask = ac_err_mask(status);
1473 if (mask == 0)
1474 return AC_ERR_OTHER;
1475 return mask;
1476 }
1477
1478 static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
1479 {
1480 return *(struct ata_port **)&host->hostdata[0];
1481 }
1482
1483 static inline int ata_check_ready(u8 status)
1484 {
1485 if (!(status & ATA_BUSY))
1486 return 1;
1487
1488 /* 0xff indicates either no device or device not ready */
1489 if (status == 0xff)
1490 return -ENODEV;
1491
1492 return 0;
1493 }
1494
1495 static inline unsigned long ata_deadline(unsigned long from_jiffies,
1496 unsigned long timeout_msecs)
1497 {
1498 return from_jiffies + msecs_to_jiffies(timeout_msecs);
1499 }
1500
1501 /* Don't open code these in drivers as there are traps. Firstly the range may
1502 change in future hardware and specs, secondly 0xFF means 'no DMA' but is
1503 > UDMA_0. Dyma ddreigiau */
1504
1505 static inline int ata_using_mwdma(struct ata_device *adev)
1506 {
1507 if (adev->dma_mode >= XFER_MW_DMA_0 && adev->dma_mode <= XFER_MW_DMA_4)
1508 return 1;
1509 return 0;
1510 }
1511
1512 static inline int ata_using_udma(struct ata_device *adev)
1513 {
1514 if (adev->dma_mode >= XFER_UDMA_0 && adev->dma_mode <= XFER_UDMA_7)
1515 return 1;
1516 return 0;
1517 }
1518
1519 static inline int ata_dma_enabled(struct ata_device *adev)
1520 {
1521 return (adev->dma_mode == 0xFF ? 0 : 1);
1522 }
1523
1524 /**************************************************************************
1525 * PMP - drivers/ata/libata-pmp.c
1526 */
1527 #ifdef CONFIG_SATA_PMP
1528
1529 extern const struct ata_port_operations sata_pmp_port_ops;
1530
1531 extern int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc);
1532 extern void sata_pmp_error_handler(struct ata_port *ap);
1533
1534 #else /* CONFIG_SATA_PMP */
1535
1536 #define sata_pmp_port_ops sata_port_ops
1537 #define sata_pmp_qc_defer_cmd_switch ata_std_qc_defer
1538 #define sata_pmp_error_handler ata_std_error_handler
1539
1540 #endif /* CONFIG_SATA_PMP */
1541
1542
1543 /**************************************************************************
1544 * SFF - drivers/ata/libata-sff.c
1545 */
1546 #ifdef CONFIG_ATA_SFF
1547
1548 extern const struct ata_port_operations ata_sff_port_ops;
1549 extern const struct ata_port_operations ata_bmdma_port_ops;
1550 extern const struct ata_port_operations ata_bmdma32_port_ops;
1551
1552 /* PIO only, sg_tablesize and dma_boundary limits can be removed */
1553 #define ATA_PIO_SHT(drv_name) \
1554 ATA_BASE_SHT(drv_name), \
1555 .sg_tablesize = LIBATA_MAX_PRD, \
1556 .dma_boundary = ATA_DMA_BOUNDARY
1557
1558 #define ATA_BMDMA_SHT(drv_name) \
1559 ATA_BASE_SHT(drv_name), \
1560 .sg_tablesize = LIBATA_MAX_PRD, \
1561 .dma_boundary = ATA_DMA_BOUNDARY
1562
1563 extern void ata_sff_qc_prep(struct ata_queued_cmd *qc);
1564 extern void ata_sff_dumb_qc_prep(struct ata_queued_cmd *qc);
1565 extern void ata_sff_dev_select(struct ata_port *ap, unsigned int device);
1566 extern u8 ata_sff_check_status(struct ata_port *ap);
1567 extern void ata_sff_pause(struct ata_port *ap);
1568 extern void ata_sff_dma_pause(struct ata_port *ap);
1569 extern int ata_sff_busy_sleep(struct ata_port *ap,
1570 unsigned long timeout_pat, unsigned long timeout);
1571 extern int ata_sff_wait_ready(struct ata_link *link, unsigned long deadline);
1572 extern void ata_sff_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
1573 extern void ata_sff_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
1574 extern void ata_sff_exec_command(struct ata_port *ap,
1575 const struct ata_taskfile *tf);
1576 extern unsigned int ata_sff_data_xfer(struct ata_device *dev,
1577 unsigned char *buf, unsigned int buflen, int rw);
1578 extern unsigned int ata_sff_data_xfer32(struct ata_device *dev,
1579 unsigned char *buf, unsigned int buflen, int rw);
1580 extern unsigned int ata_sff_data_xfer_noirq(struct ata_device *dev,
1581 unsigned char *buf, unsigned int buflen, int rw);
1582 extern u8 ata_sff_irq_on(struct ata_port *ap);
1583 extern void ata_sff_irq_clear(struct ata_port *ap);
1584 extern int ata_sff_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
1585 u8 status, int in_wq);
1586 extern unsigned int ata_sff_qc_issue(struct ata_queued_cmd *qc);
1587 extern bool ata_sff_qc_fill_rtf(struct ata_queued_cmd *qc);
1588 extern unsigned int ata_sff_host_intr(struct ata_port *ap,
1589 struct ata_queued_cmd *qc);
1590 extern irqreturn_t ata_sff_interrupt(int irq, void *dev_instance);
1591 extern void ata_sff_lost_interrupt(struct ata_port *ap);
1592 extern void ata_sff_freeze(struct ata_port *ap);
1593 extern void ata_sff_thaw(struct ata_port *ap);
1594 extern int ata_sff_prereset(struct ata_link *link, unsigned long deadline);
1595 extern unsigned int ata_sff_dev_classify(struct ata_device *dev, int present,
1596 u8 *r_err);
1597 extern int ata_sff_wait_after_reset(struct ata_link *link, unsigned int devmask,
1598 unsigned long deadline);
1599 extern int ata_sff_softreset(struct ata_link *link, unsigned int *classes,
1600 unsigned long deadline);
1601 extern int sata_sff_hardreset(struct ata_link *link, unsigned int *class,
1602 unsigned long deadline);
1603 extern void ata_sff_postreset(struct ata_link *link, unsigned int *classes);
1604 extern void ata_sff_drain_fifo(struct ata_queued_cmd *qc);
1605 extern void ata_sff_error_handler(struct ata_port *ap);
1606 extern void ata_sff_post_internal_cmd(struct ata_queued_cmd *qc);
1607 extern int ata_sff_port_start(struct ata_port *ap);
1608 extern int ata_sff_port_start32(struct ata_port *ap);
1609 extern void ata_sff_std_ports(struct ata_ioports *ioaddr);
1610 extern unsigned long ata_bmdma_mode_filter(struct ata_device *dev,
1611 unsigned long xfer_mask);
1612 extern void ata_bmdma_setup(struct ata_queued_cmd *qc);
1613 extern void ata_bmdma_start(struct ata_queued_cmd *qc);
1614 extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
1615 extern u8 ata_bmdma_status(struct ata_port *ap);
1616 extern void ata_bus_reset(struct ata_port *ap);
1617
1618 #ifdef CONFIG_PCI
1619 extern int ata_pci_bmdma_clear_simplex(struct pci_dev *pdev);
1620 extern int ata_pci_bmdma_init(struct ata_host *host);
1621 extern int ata_pci_sff_init_host(struct ata_host *host);
1622 extern int ata_pci_sff_prepare_host(struct pci_dev *pdev,
1623 const struct ata_port_info * const * ppi,
1624 struct ata_host **r_host);
1625 extern int ata_pci_sff_activate_host(struct ata_host *host,
1626 irq_handler_t irq_handler,
1627 struct scsi_host_template *sht);
1628 extern int ata_pci_sff_init_one(struct pci_dev *pdev,
1629 const struct ata_port_info * const * ppi,
1630 struct scsi_host_template *sht, void *host_priv);
1631 #endif /* CONFIG_PCI */
1632
1633 /**
1634 * ata_sff_busy_wait - Wait for a port status register
1635 * @ap: Port to wait for.
1636 * @bits: bits that must be clear
1637 * @max: number of 10uS waits to perform
1638 *
1639 * Waits up to max*10 microseconds for the selected bits in the port's
1640 * status register to be cleared.
1641 * Returns final value of status register.
1642 *
1643 * LOCKING:
1644 * Inherited from caller.
1645 */
1646 static inline u8 ata_sff_busy_wait(struct ata_port *ap, unsigned int bits,
1647 unsigned int max)
1648 {
1649 u8 status;
1650
1651 do {
1652 udelay(10);
1653 status = ap->ops->sff_check_status(ap);
1654 max--;
1655 } while (status != 0xff && (status & bits) && (max > 0));
1656
1657 return status;
1658 }
1659
1660 /**
1661 * ata_wait_idle - Wait for a port to be idle.
1662 * @ap: Port to wait for.
1663 *
1664 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
1665 * Returns final value of status register.
1666 *
1667 * LOCKING:
1668 * Inherited from caller.
1669 */
1670 static inline u8 ata_wait_idle(struct ata_port *ap)
1671 {
1672 u8 status = ata_sff_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
1673
1674 #ifdef ATA_DEBUG
1675 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ)))
1676 ata_port_printk(ap, KERN_DEBUG, "abnormal Status 0x%X\n",
1677 status);
1678 #endif
1679
1680 return status;
1681 }
1682 #endif /* CONFIG_ATA_SFF */
1683
1684 #endif /* __LINUX_LIBATA_H__ */
Linus' kernel tree