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drm/i915: Do not mis-classify clean objects as purgeable
[linux-2.6/linux-2.6-openrd.git] / include / linux / libata.h
blobe5b6e33c65710a6f82593387e1f8e18663394ff4
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_SPUNDOWN = (1 << 14), /* XXX: for spindown_compat */
147 ATA_DFLAG_SLEEPING = (1 << 15), /* device is sleeping */
148 ATA_DFLAG_DUBIOUS_XFER = (1 << 16), /* data transfer not verified */
149 ATA_DFLAG_NO_UNLOAD = (1 << 17), /* device doesn't support unload */
150 ATA_DFLAG_INIT_MASK = (1 << 24) - 1,
151
152 ATA_DFLAG_DETACH = (1 << 24),
153 ATA_DFLAG_DETACHED = (1 << 25),
154
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) */
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 */
165
166 /* struct ata_link flags */
167 ATA_LFLAG_NO_HRST = (1 << 1), /* avoid hardreset */
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,
172 ATA_LFLAG_NO_RETRY = (1 << 5), /* don't retry this link */
173 ATA_LFLAG_DISABLED = (1 << 6), /* link is disabled */
174 ATA_LFLAG_SW_ACTIVITY = (1 << 7), /* keep activity stats */
175
176 /* struct ata_port flags */
177 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */
178 /* (doesn't imply presence) */
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 */
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 */
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 */
192 ATA_FLAG_DEBUGMSG = (1 << 13),
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
390 /* DMA mask for user DMA control: User visible values; DO NOT
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 */
395
396 /* ATAPI command types */
397 ATAPI_READ = 0, /* READs */
398 ATAPI_WRITE = 1, /* WRITEs */
399 ATAPI_READ_CD = 2, /* READ CD [MSF] */
400 ATAPI_PASS_THRU = 3, /* SAT pass-thru */
401 ATAPI_MISC = 4, /* the rest */
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),
412 ATA_TIMING_DMACK_HOLD = (1 << 6),
413 ATA_TIMING_CYCLE = (1 << 7),
414 ATA_TIMING_UDMA = (1 << 8),
415 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
416 ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
417 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
418 ATA_TIMING_DMACK_HOLD | ATA_TIMING_CYCLE |
419 ATA_TIMING_UDMA,
420 };
421
422 enum ata_xfer_mask {
423 ATA_MASK_PIO = ((1LU << ATA_NR_PIO_MODES) - 1)
424 << ATA_SHIFT_PIO,
425 ATA_MASK_MWDMA = ((1LU << ATA_NR_MWDMA_MODES) - 1)
426 << ATA_SHIFT_MWDMA,
427 ATA_MASK_UDMA = ((1LU << ATA_NR_UDMA_MODES) - 1)
428 << ATA_SHIFT_UDMA,
429 };
430
431 enum hsm_task_states {
432 HSM_ST_IDLE, /* no command on going */
433 HSM_ST_FIRST, /* (waiting the device to)
434 write CDB or first data block */
435 HSM_ST, /* (waiting the device to) transfer data */
436 HSM_ST_LAST, /* (waiting the device to) complete command */
437 HSM_ST_ERR, /* error */
438 };
439
440 enum ata_completion_errors {
441 AC_ERR_DEV = (1 << 0), /* device reported error */
442 AC_ERR_HSM = (1 << 1), /* host state machine violation */
443 AC_ERR_TIMEOUT = (1 << 2), /* timeout */
444 AC_ERR_MEDIA = (1 << 3), /* media error */
445 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */
446 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */
447 AC_ERR_SYSTEM = (1 << 6), /* system error */
448 AC_ERR_INVALID = (1 << 7), /* invalid argument */
449 AC_ERR_OTHER = (1 << 8), /* unknown */
450 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */
451 AC_ERR_NCQ = (1 << 10), /* marker for offending NCQ qc */
452 };
453
454 /* forward declarations */
455 struct scsi_device;
456 struct ata_port_operations;
457 struct ata_port;
458 struct ata_link;
459 struct ata_queued_cmd;
460
461 /* typedefs */
462 typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
463 typedef int (*ata_prereset_fn_t)(struct ata_link *link, unsigned long deadline);
464 typedef int (*ata_reset_fn_t)(struct ata_link *link, unsigned int *classes,
465 unsigned long deadline);
466 typedef void (*ata_postreset_fn_t)(struct ata_link *link, unsigned int *classes);
467
468 /*
469 * host pm policy: If you alter this, you also need to alter libata-scsi.c
470 * (for the ascii descriptions)
471 */
472 enum link_pm {
473 NOT_AVAILABLE,
474 MIN_POWER,
475 MAX_PERFORMANCE,
476 MEDIUM_POWER,
477 };
478 extern struct device_attribute dev_attr_link_power_management_policy;
479 extern struct device_attribute dev_attr_unload_heads;
480 extern struct device_attribute dev_attr_em_message_type;
481 extern struct device_attribute dev_attr_em_message;
482 extern struct device_attribute dev_attr_sw_activity;
483
484 enum sw_activity {
485 OFF,
486 BLINK_ON,
487 BLINK_OFF,
488 };
489
490 #ifdef CONFIG_ATA_SFF
491 struct ata_ioports {
492 void __iomem *cmd_addr;
493 void __iomem *data_addr;
494 void __iomem *error_addr;
495 void __iomem *feature_addr;
496 void __iomem *nsect_addr;
497 void __iomem *lbal_addr;
498 void __iomem *lbam_addr;
499 void __iomem *lbah_addr;
500 void __iomem *device_addr;
501 void __iomem *status_addr;
502 void __iomem *command_addr;
503 void __iomem *altstatus_addr;
504 void __iomem *ctl_addr;
505 void __iomem *bmdma_addr;
506 void __iomem *scr_addr;
507 };
508 #endif /* CONFIG_ATA_SFF */
509
510 struct ata_host {
511 spinlock_t lock;
512 struct device *dev;
513 void __iomem * const *iomap;
514 unsigned int n_ports;
515 void *private_data;
516 struct ata_port_operations *ops;
517 unsigned long flags;
518 #ifdef CONFIG_ATA_ACPI
519 acpi_handle acpi_handle;
520 #endif
521 struct ata_port *simplex_claimed; /* channel owning the DMA */
522 struct ata_port *ports[0];
523 };
524
525 struct ata_queued_cmd {
526 struct ata_port *ap;
527 struct ata_device *dev;
528
529 struct scsi_cmnd *scsicmd;
530 void (*scsidone)(struct scsi_cmnd *);
531
532 struct ata_taskfile tf;
533 u8 cdb[ATAPI_CDB_LEN];
534
535 unsigned long flags; /* ATA_QCFLAG_xxx */
536 unsigned int tag;
537 unsigned int n_elem;
538 unsigned int orig_n_elem;
539
540 int dma_dir;
541
542 unsigned int sect_size;
543
544 unsigned int nbytes;
545 unsigned int extrabytes;
546 unsigned int curbytes;
547
548 struct scatterlist *cursg;
549 unsigned int cursg_ofs;
550
551 struct scatterlist sgent;
552
553 struct scatterlist *sg;
554
555 unsigned int err_mask;
556 struct ata_taskfile result_tf;
557 ata_qc_cb_t complete_fn;
558
559 void *private_data;
560 void *lldd_task;
561 };
562
563 struct ata_port_stats {
564 unsigned long unhandled_irq;
565 unsigned long idle_irq;
566 unsigned long rw_reqbuf;
567 };
568
569 struct ata_ering_entry {
570 unsigned int eflags;
571 unsigned int err_mask;
572 u64 timestamp;
573 };
574
575 struct ata_ering {
576 int cursor;
577 struct ata_ering_entry ring[ATA_ERING_SIZE];
578 };
579
580 struct ata_device {
581 struct ata_link *link;
582 unsigned int devno; /* 0 or 1 */
583 unsigned int horkage; /* List of broken features */
584 unsigned long flags; /* ATA_DFLAG_xxx */
585 struct scsi_device *sdev; /* attached SCSI device */
586 #ifdef CONFIG_ATA_ACPI
587 acpi_handle acpi_handle;
588 union acpi_object *gtf_cache;
589 #endif
590 /* n_sector is CLEAR_BEGIN, read comment above CLEAR_BEGIN */
591 u64 n_sectors; /* size of device, if ATA */
592 u64 n_native_sectors; /* native size, if ATA */
593 unsigned int class; /* ATA_DEV_xxx */
594 unsigned long unpark_deadline;
595
596 u8 pio_mode;
597 u8 dma_mode;
598 u8 xfer_mode;
599 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
600
601 unsigned int multi_count; /* sectors count for
602 READ/WRITE MULTIPLE */
603 unsigned int max_sectors; /* per-device max sectors */
604 unsigned int cdb_len;
605
606 /* per-dev xfer mask */
607 unsigned long pio_mask;
608 unsigned long mwdma_mask;
609 unsigned long udma_mask;
610
611 /* for CHS addressing */
612 u16 cylinders; /* Number of cylinders */
613 u16 heads; /* Number of heads */
614 u16 sectors; /* Number of sectors per track */
615
616 union {
617 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
618 u32 gscr[SATA_PMP_GSCR_DWORDS]; /* PMP GSCR block */
619 };
620
621 /* error history */
622 int spdn_cnt;
623 /* ering is CLEAR_END, read comment above CLEAR_END */
624 struct ata_ering ering;
625 };
626
627 /* Fields between ATA_DEVICE_CLEAR_BEGIN and ATA_DEVICE_CLEAR_END are
628 * cleared to zero on ata_dev_init().
629 */
630 #define ATA_DEVICE_CLEAR_BEGIN offsetof(struct ata_device, n_sectors)
631 #define ATA_DEVICE_CLEAR_END offsetof(struct ata_device, ering)
632
633 struct ata_eh_info {
634 struct ata_device *dev; /* offending device */
635 u32 serror; /* SError from LLDD */
636 unsigned int err_mask; /* port-wide err_mask */
637 unsigned int action; /* ATA_EH_* action mask */
638 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */
639 unsigned int flags; /* ATA_EHI_* flags */
640
641 unsigned int probe_mask;
642
643 char desc[ATA_EH_DESC_LEN];
644 int desc_len;
645 };
646
647 struct ata_eh_context {
648 struct ata_eh_info i;
649 int tries[ATA_MAX_DEVICES];
650 int cmd_timeout_idx[ATA_MAX_DEVICES]
651 [ATA_EH_CMD_TIMEOUT_TABLE_SIZE];
652 unsigned int classes[ATA_MAX_DEVICES];
653 unsigned int did_probe_mask;
654 unsigned int unloaded_mask;
655 unsigned int saved_ncq_enabled;
656 u8 saved_xfer_mode[ATA_MAX_DEVICES];
657 /* timestamp for the last reset attempt or success */
658 unsigned long last_reset;
659 };
660
661 struct ata_acpi_drive
662 {
663 u32 pio;
664 u32 dma;
665 } __packed;
666
667 struct ata_acpi_gtm {
668 struct ata_acpi_drive drive[2];
669 u32 flags;
670 } __packed;
671
672 struct ata_link {
673 struct ata_port *ap;
674 int pmp; /* port multiplier port # */
675
676 unsigned int active_tag; /* active tag on this link */
677 u32 sactive; /* active NCQ commands */
678
679 unsigned int flags; /* ATA_LFLAG_xxx */
680
681 u32 saved_scontrol; /* SControl on probe */
682 unsigned int hw_sata_spd_limit;
683 unsigned int sata_spd_limit;
684 unsigned int sata_spd; /* current SATA PHY speed */
685
686 /* record runtime error info, protected by host_set lock */
687 struct ata_eh_info eh_info;
688 /* EH context */
689 struct ata_eh_context eh_context;
690
691 struct ata_device device[ATA_MAX_DEVICES];
692 };
693
694 struct ata_port {
695 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */
696 struct ata_port_operations *ops;
697 spinlock_t *lock;
698 /* Flags owned by the EH context. Only EH should touch these once the
699 port is active */
700 unsigned long flags; /* ATA_FLAG_xxx */
701 /* Flags that change dynamically, protected by ap->lock */
702 unsigned int pflags; /* ATA_PFLAG_xxx */
703 unsigned int print_id; /* user visible unique port ID */
704 unsigned int port_no; /* 0 based port no. inside the host */
705
706 struct ata_prd *prd; /* our SG list */
707 dma_addr_t prd_dma; /* and its DMA mapping */
708
709 #ifdef CONFIG_ATA_SFF
710 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
711 #endif /* CONFIG_ATA_SFF */
712
713 u8 ctl; /* cache of ATA control register */
714 u8 last_ctl; /* Cache last written value */
715 unsigned int pio_mask;
716 unsigned int mwdma_mask;
717 unsigned int udma_mask;
718 unsigned int cbl; /* cable type; ATA_CBL_xxx */
719
720 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
721 unsigned long qc_allocated;
722 unsigned int qc_active;
723 int nr_active_links; /* #links with active qcs */
724
725 struct ata_link link; /* host default link */
726 struct ata_link *slave_link; /* see ata_slave_link_init() */
727
728 int nr_pmp_links; /* nr of available PMP links */
729 struct ata_link *pmp_link; /* array of PMP links */
730 struct ata_link *excl_link; /* for PMP qc exclusion */
731
732 struct ata_port_stats stats;
733 struct ata_host *host;
734 struct device *dev;
735
736 void *port_task_data;
737 struct delayed_work port_task;
738 struct delayed_work hotplug_task;
739 struct work_struct scsi_rescan_task;
740
741 unsigned int hsm_task_state;
742
743 u32 msg_enable;
744 struct list_head eh_done_q;
745 wait_queue_head_t eh_wait_q;
746 int eh_tries;
747 struct completion park_req_pending;
748
749 pm_message_t pm_mesg;
750 int *pm_result;
751 enum link_pm pm_policy;
752
753 struct timer_list fastdrain_timer;
754 unsigned long fastdrain_cnt;
755
756 int em_message_type;
757 void *private_data;
758
759 #ifdef CONFIG_ATA_ACPI
760 acpi_handle acpi_handle;
761 struct ata_acpi_gtm __acpi_init_gtm; /* use ata_acpi_init_gtm() */
762 #endif
763 /* owned by EH */
764 u8 sector_buf[ATA_SECT_SIZE] ____cacheline_aligned;
765 };
766
767 /* The following initializer overrides a method to NULL whether one of
768 * its parent has the method defined or not. This is equivalent to
769 * ERR_PTR(-ENOENT). Unfortunately, ERR_PTR doesn't render a constant
770 * expression and thus can't be used as an initializer.
771 */
772 #define ATA_OP_NULL (void *)(unsigned long)(-ENOENT)
773
774 struct ata_port_operations {
775 /*
776 * Command execution
777 */
778 int (*qc_defer)(struct ata_queued_cmd *qc);
779 int (*check_atapi_dma)(struct ata_queued_cmd *qc);
780 void (*qc_prep)(struct ata_queued_cmd *qc);
781 unsigned int (*qc_issue)(struct ata_queued_cmd *qc);
782 bool (*qc_fill_rtf)(struct ata_queued_cmd *qc);
783
784 /*
785 * Configuration and exception handling
786 */
787 int (*cable_detect)(struct ata_port *ap);
788 unsigned long (*mode_filter)(struct ata_device *dev, unsigned long xfer_mask);
789 void (*set_piomode)(struct ata_port *ap, struct ata_device *dev);
790 void (*set_dmamode)(struct ata_port *ap, struct ata_device *dev);
791 int (*set_mode)(struct ata_link *link, struct ata_device **r_failed_dev);
792 unsigned int (*read_id)(struct ata_device *dev, struct ata_taskfile *tf, u16 *id);
793
794 void (*dev_config)(struct ata_device *dev);
795
796 void (*freeze)(struct ata_port *ap);
797 void (*thaw)(struct ata_port *ap);
798 ata_prereset_fn_t prereset;
799 ata_reset_fn_t softreset;
800 ata_reset_fn_t hardreset;
801 ata_postreset_fn_t postreset;
802 ata_prereset_fn_t pmp_prereset;
803 ata_reset_fn_t pmp_softreset;
804 ata_reset_fn_t pmp_hardreset;
805 ata_postreset_fn_t pmp_postreset;
806 void (*error_handler)(struct ata_port *ap);
807 void (*lost_interrupt)(struct ata_port *ap);
808 void (*post_internal_cmd)(struct ata_queued_cmd *qc);
809
810 /*
811 * Optional features
812 */
813 int (*scr_read)(struct ata_link *link, unsigned int sc_reg, u32 *val);
814 int (*scr_write)(struct ata_link *link, unsigned int sc_reg, u32 val);
815 void (*pmp_attach)(struct ata_port *ap);
816 void (*pmp_detach)(struct ata_port *ap);
817 int (*enable_pm)(struct ata_port *ap, enum link_pm policy);
818 void (*disable_pm)(struct ata_port *ap);
819
820 /*
821 * Start, stop, suspend and resume
822 */
823 int (*port_suspend)(struct ata_port *ap, pm_message_t mesg);
824 int (*port_resume)(struct ata_port *ap);
825 int (*port_start)(struct ata_port *ap);
826 void (*port_stop)(struct ata_port *ap);
827 void (*host_stop)(struct ata_host *host);
828
829 #ifdef CONFIG_ATA_SFF
830 /*
831 * SFF / taskfile oriented ops
832 */
833 void (*sff_dev_select)(struct ata_port *ap, unsigned int device);
834 u8 (*sff_check_status)(struct ata_port *ap);
835 u8 (*sff_check_altstatus)(struct ata_port *ap);
836 void (*sff_tf_load)(struct ata_port *ap, const struct ata_taskfile *tf);
837 void (*sff_tf_read)(struct ata_port *ap, struct ata_taskfile *tf);
838 void (*sff_exec_command)(struct ata_port *ap,
839 const struct ata_taskfile *tf);
840 unsigned int (*sff_data_xfer)(struct ata_device *dev,
841 unsigned char *buf, unsigned int buflen, int rw);
842 u8 (*sff_irq_on)(struct ata_port *);
843 void (*sff_irq_clear)(struct ata_port *);
844
845 void (*bmdma_setup)(struct ata_queued_cmd *qc);
846 void (*bmdma_start)(struct ata_queued_cmd *qc);
847 void (*bmdma_stop)(struct ata_queued_cmd *qc);
848 u8 (*bmdma_status)(struct ata_port *ap);
849
850 void (*drain_fifo)(struct ata_queued_cmd *qc);
851 #endif /* CONFIG_ATA_SFF */
852
853 ssize_t (*em_show)(struct ata_port *ap, char *buf);
854 ssize_t (*em_store)(struct ata_port *ap, const char *message,
855 size_t size);
856 ssize_t (*sw_activity_show)(struct ata_device *dev, char *buf);
857 ssize_t (*sw_activity_store)(struct ata_device *dev,
858 enum sw_activity val);
859 /*
860 * Obsolete
861 */
862 void (*phy_reset)(struct ata_port *ap);
863 void (*eng_timeout)(struct ata_port *ap);
864
865 /*
866 * ->inherits must be the last field and all the preceding
867 * fields must be pointers.
868 */
869 const struct ata_port_operations *inherits;
870 };
871
872 struct ata_port_info {
873 unsigned long flags;
874 unsigned long link_flags;
875 unsigned long pio_mask;
876 unsigned long mwdma_mask;
877 unsigned long udma_mask;
878 struct ata_port_operations *port_ops;
879 void *private_data;
880 };
881
882 struct ata_timing {
883 unsigned short mode; /* ATA mode */
884 unsigned short setup; /* t1 */
885 unsigned short act8b; /* t2 for 8-bit I/O */
886 unsigned short rec8b; /* t2i for 8-bit I/O */
887 unsigned short cyc8b; /* t0 for 8-bit I/O */
888 unsigned short active; /* t2 or tD */
889 unsigned short recover; /* t2i or tK */
890 unsigned short dmack_hold; /* tj */
891 unsigned short cycle; /* t0 */
892 unsigned short udma; /* t2CYCTYP/2 */
893 };
894
895 /*
896 * Core layer - drivers/ata/libata-core.c
897 */
898 extern const unsigned long sata_deb_timing_normal[];
899 extern const unsigned long sata_deb_timing_hotplug[];
900 extern const unsigned long sata_deb_timing_long[];
901
902 extern struct ata_port_operations ata_dummy_port_ops;
903 extern const struct ata_port_info ata_dummy_port_info;
904
905 static inline const unsigned long *
906 sata_ehc_deb_timing(struct ata_eh_context *ehc)
907 {
908 if (ehc->i.flags & ATA_EHI_HOTPLUGGED)
909 return sata_deb_timing_hotplug;
910 else
911 return sata_deb_timing_normal;
912 }
913
914 static inline int ata_port_is_dummy(struct ata_port *ap)
915 {
916 return ap->ops == &ata_dummy_port_ops;
917 }
918
919 extern void ata_port_probe(struct ata_port *);
920 extern int sata_set_spd(struct ata_link *link);
921 extern int ata_std_prereset(struct ata_link *link, unsigned long deadline);
922 extern int ata_wait_after_reset(struct ata_link *link, unsigned long deadline,
923 int (*check_ready)(struct ata_link *link));
924 extern int sata_link_debounce(struct ata_link *link,
925 const unsigned long *params, unsigned long deadline);
926 extern int sata_link_resume(struct ata_link *link, const unsigned long *params,
927 unsigned long deadline);
928 extern int sata_link_hardreset(struct ata_link *link,
929 const unsigned long *timing, unsigned long deadline,
930 bool *online, int (*check_ready)(struct ata_link *));
931 extern int sata_std_hardreset(struct ata_link *link, unsigned int *class,
932 unsigned long deadline);
933 extern void ata_std_postreset(struct ata_link *link, unsigned int *classes);
934 extern void ata_port_disable(struct ata_port *);
935
936 extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports);
937 extern struct ata_host *ata_host_alloc_pinfo(struct device *dev,
938 const struct ata_port_info * const * ppi, int n_ports);
939 extern int ata_slave_link_init(struct ata_port *ap);
940 extern int ata_host_start(struct ata_host *host);
941 extern int ata_host_register(struct ata_host *host,
942 struct scsi_host_template *sht);
943 extern int ata_host_activate(struct ata_host *host, int irq,
944 irq_handler_t irq_handler, unsigned long irq_flags,
945 struct scsi_host_template *sht);
946 extern void ata_host_detach(struct ata_host *host);
947 extern void ata_host_init(struct ata_host *, struct device *,
948 unsigned long, struct ata_port_operations *);
949 extern int ata_scsi_detect(struct scsi_host_template *sht);
950 extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
951 extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *));
952 extern int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *dev,
953 int cmd, void __user *arg);
954 extern void ata_sas_port_destroy(struct ata_port *);
955 extern struct ata_port *ata_sas_port_alloc(struct ata_host *,
956 struct ata_port_info *, struct Scsi_Host *);
957 extern int ata_sas_port_init(struct ata_port *);
958 extern int ata_sas_port_start(struct ata_port *ap);
959 extern void ata_sas_port_stop(struct ata_port *ap);
960 extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *);
961 extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
962 struct ata_port *ap);
963 extern int sata_scr_valid(struct ata_link *link);
964 extern int sata_scr_read(struct ata_link *link, int reg, u32 *val);
965 extern int sata_scr_write(struct ata_link *link, int reg, u32 val);
966 extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val);
967 extern bool ata_link_online(struct ata_link *link);
968 extern bool ata_link_offline(struct ata_link *link);
969 #ifdef CONFIG_PM
970 extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg);
971 extern void ata_host_resume(struct ata_host *host);
972 #endif
973 extern int ata_ratelimit(void);
974 extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
975 unsigned long interval, unsigned long timeout);
976 extern int atapi_cmd_type(u8 opcode);
977 extern void ata_tf_to_fis(const struct ata_taskfile *tf,
978 u8 pmp, int is_cmd, u8 *fis);
979 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
980 extern unsigned long ata_pack_xfermask(unsigned long pio_mask,
981 unsigned long mwdma_mask, unsigned long udma_mask);
982 extern void ata_unpack_xfermask(unsigned long xfer_mask,
983 unsigned long *pio_mask, unsigned long *mwdma_mask,
984 unsigned long *udma_mask);
985 extern u8 ata_xfer_mask2mode(unsigned long xfer_mask);
986 extern unsigned long ata_xfer_mode2mask(u8 xfer_mode);
987 extern int ata_xfer_mode2shift(unsigned long xfer_mode);
988 extern const char *ata_mode_string(unsigned long xfer_mask);
989 extern unsigned long ata_id_xfermask(const u16 *id);
990 extern int ata_port_start(struct ata_port *ap);
991 extern int ata_std_qc_defer(struct ata_queued_cmd *qc);
992 extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
993 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
994 unsigned int n_elem);
995 extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
996 extern void ata_dev_disable(struct ata_device *adev);
997 extern void ata_id_string(const u16 *id, unsigned char *s,
998 unsigned int ofs, unsigned int len);
999 extern void ata_id_c_string(const u16 *id, unsigned char *s,
1000 unsigned int ofs, unsigned int len);
1001 extern unsigned int ata_do_dev_read_id(struct ata_device *dev,
1002 struct ata_taskfile *tf, u16 *id);
1003 extern void ata_qc_complete(struct ata_queued_cmd *qc);
1004 extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active);
1005 extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
1006 void (*done)(struct scsi_cmnd *));
1007 extern int ata_std_bios_param(struct scsi_device *sdev,
1008 struct block_device *bdev,
1009 sector_t capacity, int geom[]);
1010 extern int ata_scsi_slave_config(struct scsi_device *sdev);
1011 extern void ata_scsi_slave_destroy(struct scsi_device *sdev);
1012 extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
1013 int queue_depth);
1014 extern struct ata_device *ata_dev_pair(struct ata_device *adev);
1015 extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev);
1016
1017 extern int ata_cable_40wire(struct ata_port *ap);
1018 extern int ata_cable_80wire(struct ata_port *ap);
1019 extern int ata_cable_sata(struct ata_port *ap);
1020 extern int ata_cable_ignore(struct ata_port *ap);
1021 extern int ata_cable_unknown(struct ata_port *ap);
1022
1023 extern void ata_pio_queue_task(struct ata_port *ap, void *data,
1024 unsigned long delay);
1025
1026 /* Timing helpers */
1027 extern unsigned int ata_pio_need_iordy(const struct ata_device *);
1028 extern const struct ata_timing *ata_timing_find_mode(u8 xfer_mode);
1029 extern int ata_timing_compute(struct ata_device *, unsigned short,
1030 struct ata_timing *, int, int);
1031 extern void ata_timing_merge(const struct ata_timing *,
1032 const struct ata_timing *, struct ata_timing *,
1033 unsigned int);
1034 extern u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle);
1035
1036 /* PCI */
1037 #ifdef CONFIG_PCI
1038 struct pci_dev;
1039
1040 struct pci_bits {
1041 unsigned int reg; /* PCI config register to read */
1042 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
1043 unsigned long mask;
1044 unsigned long val;
1045 };
1046
1047 extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
1048 extern void ata_pci_remove_one(struct pci_dev *pdev);
1049
1050 #ifdef CONFIG_PM
1051 extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg);
1052 extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev);
1053 extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
1054 extern int ata_pci_device_resume(struct pci_dev *pdev);
1055 #endif /* CONFIG_PM */
1056 #endif /* CONFIG_PCI */
1057
1058 /*
1059 * ACPI - drivers/ata/libata-acpi.c
1060 */
1061 #ifdef CONFIG_ATA_ACPI
1062 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
1063 {
1064 if (ap->pflags & ATA_PFLAG_INIT_GTM_VALID)
1065 return &ap->__acpi_init_gtm;
1066 return NULL;
1067 }
1068 int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm);
1069 int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *stm);
1070 unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev,
1071 const struct ata_acpi_gtm *gtm);
1072 int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm);
1073 #else
1074 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
1075 {
1076 return NULL;
1077 }
1078
1079 static inline int ata_acpi_stm(const struct ata_port *ap,
1080 struct ata_acpi_gtm *stm)
1081 {
1082 return -ENOSYS;
1083 }
1084
1085 static inline int ata_acpi_gtm(const struct ata_port *ap,
1086 struct ata_acpi_gtm *stm)
1087 {
1088 return -ENOSYS;
1089 }
1090
1091 static inline unsigned int ata_acpi_gtm_xfermask(struct ata_device *dev,
1092 const struct ata_acpi_gtm *gtm)
1093 {
1094 return 0;
1095 }
1096
1097 static inline int ata_acpi_cbl_80wire(struct ata_port *ap,
1098 const struct ata_acpi_gtm *gtm)
1099 {
1100 return 0;
1101 }
1102 #endif
1103
1104 /*
1105 * EH - drivers/ata/libata-eh.c
1106 */
1107 extern void ata_port_schedule_eh(struct ata_port *ap);
1108 extern int ata_link_abort(struct ata_link *link);
1109 extern int ata_port_abort(struct ata_port *ap);
1110 extern int ata_port_freeze(struct ata_port *ap);
1111 extern int sata_async_notification(struct ata_port *ap);
1112
1113 extern void ata_eh_freeze_port(struct ata_port *ap);
1114 extern void ata_eh_thaw_port(struct ata_port *ap);
1115
1116 extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
1117 extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
1118 extern void ata_eh_analyze_ncq_error(struct ata_link *link);
1119
1120 extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
1121 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
1122 ata_postreset_fn_t postreset);
1123 extern void ata_std_error_handler(struct ata_port *ap);
1124
1125 /*
1126 * Base operations to inherit from and initializers for sht
1127 *
1128 * Operations
1129 *
1130 * base : Common to all libata drivers.
1131 * sata : SATA controllers w/ native interface.
1132 * pmp : SATA controllers w/ PMP support.
1133 * sff : SFF ATA controllers w/o BMDMA support.
1134 * bmdma : SFF ATA controllers w/ BMDMA support.
1135 *
1136 * sht initializers
1137 *
1138 * BASE : Common to all libata drivers. The user must set
1139 * sg_tablesize and dma_boundary.
1140 * PIO : SFF ATA controllers w/ only PIO support.
1141 * BMDMA : SFF ATA controllers w/ BMDMA support. sg_tablesize and
1142 * dma_boundary are set to BMDMA limits.
1143 * NCQ : SATA controllers supporting NCQ. The user must set
1144 * sg_tablesize, dma_boundary and can_queue.
1145 */
1146 extern const struct ata_port_operations ata_base_port_ops;
1147 extern const struct ata_port_operations sata_port_ops;
1148 extern struct device_attribute *ata_common_sdev_attrs[];
1149
1150 #define ATA_BASE_SHT(drv_name) \
1151 .module = THIS_MODULE, \
1152 .name = drv_name, \
1153 .ioctl = ata_scsi_ioctl, \
1154 .queuecommand = ata_scsi_queuecmd, \
1155 .can_queue = ATA_DEF_QUEUE, \
1156 .this_id = ATA_SHT_THIS_ID, \
1157 .cmd_per_lun = ATA_SHT_CMD_PER_LUN, \
1158 .emulated = ATA_SHT_EMULATED, \
1159 .use_clustering = ATA_SHT_USE_CLUSTERING, \
1160 .proc_name = drv_name, \
1161 .slave_configure = ata_scsi_slave_config, \
1162 .slave_destroy = ata_scsi_slave_destroy, \
1163 .bios_param = ata_std_bios_param, \
1164 .sdev_attrs = ata_common_sdev_attrs
1165
1166 #define ATA_NCQ_SHT(drv_name) \
1167 ATA_BASE_SHT(drv_name), \
1168 .change_queue_depth = ata_scsi_change_queue_depth
1169
1170 /*
1171 * PMP helpers
1172 */
1173 #ifdef CONFIG_SATA_PMP
1174 static inline bool sata_pmp_supported(struct ata_port *ap)
1175 {
1176 return ap->flags & ATA_FLAG_PMP;
1177 }
1178
1179 static inline bool sata_pmp_attached(struct ata_port *ap)
1180 {
1181 return ap->nr_pmp_links != 0;
1182 }
1183
1184 static inline int ata_is_host_link(const struct ata_link *link)
1185 {
1186 return link == &link->ap->link || link == link->ap->slave_link;
1187 }
1188 #else /* CONFIG_SATA_PMP */
1189 static inline bool sata_pmp_supported(struct ata_port *ap)
1190 {
1191 return false;
1192 }
1193
1194 static inline bool sata_pmp_attached(struct ata_port *ap)
1195 {
1196 return false;
1197 }
1198
1199 static inline int ata_is_host_link(const struct ata_link *link)
1200 {
1201 return 1;
1202 }
1203 #endif /* CONFIG_SATA_PMP */
1204
1205 static inline int sata_srst_pmp(struct ata_link *link)
1206 {
1207 if (sata_pmp_supported(link->ap) && ata_is_host_link(link))
1208 return SATA_PMP_CTRL_PORT;
1209 return link->pmp;
1210 }
1211
1212 /*
1213 * printk helpers
1214 */
1215 #define ata_port_printk(ap, lv, fmt, args...) \
1216 printk("%sata%u: "fmt, lv, (ap)->print_id , ##args)
1217
1218 #define ata_link_printk(link, lv, fmt, args...) do { \
1219 if (sata_pmp_attached((link)->ap) || (link)->ap->slave_link) \
1220 printk("%sata%u.%02u: "fmt, lv, (link)->ap->print_id, \
1221 (link)->pmp , ##args); \
1222 else \
1223 printk("%sata%u: "fmt, lv, (link)->ap->print_id , ##args); \
1224 } while(0)
1225
1226 #define ata_dev_printk(dev, lv, fmt, args...) \
1227 printk("%sata%u.%02u: "fmt, lv, (dev)->link->ap->print_id, \
1228 (dev)->link->pmp + (dev)->devno , ##args)
1229
1230 /*
1231 * ata_eh_info helpers
1232 */
1233 extern void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...)
1234 __attribute__ ((format (printf, 2, 3)));
1235 extern void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...)
1236 __attribute__ ((format (printf, 2, 3)));
1237 extern void ata_ehi_clear_desc(struct ata_eh_info *ehi);
1238
1239 static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
1240 {
1241 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
1242 ehi->flags |= ATA_EHI_HOTPLUGGED;
1243 ehi->action |= ATA_EH_RESET | ATA_EH_ENABLE_LINK;
1244 ehi->err_mask |= AC_ERR_ATA_BUS;
1245 }
1246
1247 /*
1248 * port description helpers
1249 */
1250 extern void ata_port_desc(struct ata_port *ap, const char *fmt, ...)
1251 __attribute__ ((format (printf, 2, 3)));
1252 #ifdef CONFIG_PCI
1253 extern void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset,
1254 const char *name);
1255 #endif
1256
1257 static inline unsigned int ata_tag_valid(unsigned int tag)
1258 {
1259 return (tag < ATA_MAX_QUEUE) ? 1 : 0;
1260 }
1261
1262 static inline unsigned int ata_tag_internal(unsigned int tag)
1263 {
1264 return tag == ATA_TAG_INTERNAL;
1265 }
1266
1267 /*
1268 * device helpers
1269 */
1270 static inline unsigned int ata_class_enabled(unsigned int class)
1271 {
1272 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI ||
1273 class == ATA_DEV_PMP || class == ATA_DEV_SEMB;
1274 }
1275
1276 static inline unsigned int ata_class_disabled(unsigned int class)
1277 {
1278 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP ||
1279 class == ATA_DEV_PMP_UNSUP || class == ATA_DEV_SEMB_UNSUP;
1280 }
1281
1282 static inline unsigned int ata_class_absent(unsigned int class)
1283 {
1284 return !ata_class_enabled(class) && !ata_class_disabled(class);
1285 }
1286
1287 static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
1288 {
1289 return ata_class_enabled(dev->class);
1290 }
1291
1292 static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
1293 {
1294 return ata_class_disabled(dev->class);
1295 }
1296
1297 static inline unsigned int ata_dev_absent(const struct ata_device *dev)
1298 {
1299 return ata_class_absent(dev->class);
1300 }
1301
1302 /*
1303 * link helpers
1304 */
1305 static inline int ata_link_max_devices(const struct ata_link *link)
1306 {
1307 if (ata_is_host_link(link) && link->ap->flags & ATA_FLAG_SLAVE_POSS)
1308 return 2;
1309 return 1;
1310 }
1311
1312 static inline int ata_link_active(struct ata_link *link)
1313 {
1314 return ata_tag_valid(link->active_tag) || link->sactive;
1315 }
1316
1317 /*
1318 * Iterators
1319 *
1320 * ATA_LITER_* constants are used to select link iteration mode and
1321 * ATA_DITER_* device iteration mode.
1322 *
1323 * For a custom iteration directly using ata_{link|dev}_next(), if
1324 * @link or @dev, respectively, is NULL, the first element is
1325 * returned. @dev and @link can be any valid device or link and the
1326 * next element according to the iteration mode will be returned.
1327 * After the last element, NULL is returned.
1328 */
1329 enum ata_link_iter_mode {
1330 ATA_LITER_EDGE, /* if present, PMP links only; otherwise,
1331 * host link. no slave link */
1332 ATA_LITER_HOST_FIRST, /* host link followed by PMP or slave links */
1333 ATA_LITER_PMP_FIRST, /* PMP links followed by host link,
1334 * slave link still comes after host link */
1335 };
1336
1337 enum ata_dev_iter_mode {
1338 ATA_DITER_ENABLED,
1339 ATA_DITER_ENABLED_REVERSE,
1340 ATA_DITER_ALL,
1341 ATA_DITER_ALL_REVERSE,
1342 };
1343
1344 extern struct ata_link *ata_link_next(struct ata_link *link,
1345 struct ata_port *ap,
1346 enum ata_link_iter_mode mode);
1347
1348 extern struct ata_device *ata_dev_next(struct ata_device *dev,
1349 struct ata_link *link,
1350 enum ata_dev_iter_mode mode);
1351
1352 /*
1353 * Shortcut notation for iterations
1354 *
1355 * ata_for_each_link() iterates over each link of @ap according to
1356 * @mode. @link points to the current link in the loop. @link is
1357 * NULL after loop termination. ata_for_each_dev() works the same way
1358 * except that it iterates over each device of @link.
1359 *
1360 * Note that the mode prefixes ATA_{L|D}ITER_ shouldn't need to be
1361 * specified when using the following shorthand notations. Only the
1362 * mode itself (EDGE, HOST_FIRST, ENABLED, etc...) should be
1363 * specified. This not only increases brevity but also makes it
1364 * impossible to use ATA_LITER_* for device iteration or vice-versa.
1365 */
1366 #define ata_for_each_link(link, ap, mode) \
1367 for ((link) = ata_link_next(NULL, (ap), ATA_LITER_##mode); (link); \
1368 (link) = ata_link_next((link), (ap), ATA_LITER_##mode))
1369
1370 #define ata_for_each_dev(dev, link, mode) \
1371 for ((dev) = ata_dev_next(NULL, (link), ATA_DITER_##mode); (dev); \
1372 (dev) = ata_dev_next((dev), (link), ATA_DITER_##mode))
1373
1374 /**
1375 * ata_ncq_enabled - Test whether NCQ is enabled
1376 * @dev: ATA device to test for
1377 *
1378 * LOCKING:
1379 * spin_lock_irqsave(host lock)
1380 *
1381 * RETURNS:
1382 * 1 if NCQ is enabled for @dev, 0 otherwise.
1383 */
1384 static inline int ata_ncq_enabled(struct ata_device *dev)
1385 {
1386 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF |
1387 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ;
1388 }
1389
1390 static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
1391 {
1392 qc->tf.ctl |= ATA_NIEN;
1393 }
1394
1395 static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap,
1396 unsigned int tag)
1397 {
1398 if (likely(ata_tag_valid(tag)))
1399 return &ap->qcmd[tag];
1400 return NULL;
1401 }
1402
1403 static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap,
1404 unsigned int tag)
1405 {
1406 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
1407
1408 if (unlikely(!qc) || !ap->ops->error_handler)
1409 return qc;
1410
1411 if ((qc->flags & (ATA_QCFLAG_ACTIVE |
1412 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE)
1413 return qc;
1414
1415 return NULL;
1416 }
1417
1418 static inline unsigned int ata_qc_raw_nbytes(struct ata_queued_cmd *qc)
1419 {
1420 return qc->nbytes - min(qc->extrabytes, qc->nbytes);
1421 }
1422
1423 static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
1424 {
1425 memset(tf, 0, sizeof(*tf));
1426
1427 tf->ctl = dev->link->ap->ctl;
1428 if (dev->devno == 0)
1429 tf->device = ATA_DEVICE_OBS;
1430 else
1431 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
1432 }
1433
1434 static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
1435 {
1436 qc->dma_dir = DMA_NONE;
1437 qc->sg = NULL;
1438 qc->flags = 0;
1439 qc->cursg = NULL;
1440 qc->cursg_ofs = 0;
1441 qc->nbytes = qc->extrabytes = qc->curbytes = 0;
1442 qc->n_elem = 0;
1443 qc->err_mask = 0;
1444 qc->sect_size = ATA_SECT_SIZE;
1445
1446 ata_tf_init(qc->dev, &qc->tf);
1447
1448 /* init result_tf such that it indicates normal completion */
1449 qc->result_tf.command = ATA_DRDY;
1450 qc->result_tf.feature = 0;
1451 }
1452
1453 static inline int ata_try_flush_cache(const struct ata_device *dev)
1454 {
1455 return ata_id_wcache_enabled(dev->id) ||
1456 ata_id_has_flush(dev->id) ||
1457 ata_id_has_flush_ext(dev->id);
1458 }
1459
1460 static inline unsigned int ac_err_mask(u8 status)
1461 {
1462 if (status & (ATA_BUSY | ATA_DRQ))
1463 return AC_ERR_HSM;
1464 if (status & (ATA_ERR | ATA_DF))
1465 return AC_ERR_DEV;
1466 return 0;
1467 }
1468
1469 static inline unsigned int __ac_err_mask(u8 status)
1470 {
1471 unsigned int mask = ac_err_mask(status);
1472 if (mask == 0)
1473 return AC_ERR_OTHER;
1474 return mask;
1475 }
1476
1477 static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
1478 {
1479 return *(struct ata_port **)&host->hostdata[0];
1480 }
1481
1482 static inline int ata_check_ready(u8 status)
1483 {
1484 if (!(status & ATA_BUSY))
1485 return 1;
1486
1487 /* 0xff indicates either no device or device not ready */
1488 if (status == 0xff)
1489 return -ENODEV;
1490
1491 return 0;
1492 }
1493
1494 static inline unsigned long ata_deadline(unsigned long from_jiffies,
1495 unsigned long timeout_msecs)
1496 {
1497 return from_jiffies + msecs_to_jiffies(timeout_msecs);
1498 }
1499
1500 /* Don't open code these in drivers as there are traps. Firstly the range may
1501 change in future hardware and specs, secondly 0xFF means 'no DMA' but is
1502 > UDMA_0. Dyma ddreigiau */
1503
1504 static inline int ata_using_mwdma(struct ata_device *adev)
1505 {
1506 if (adev->dma_mode >= XFER_MW_DMA_0 && adev->dma_mode <= XFER_MW_DMA_4)
1507 return 1;
1508 return 0;
1509 }
1510
1511 static inline int ata_using_udma(struct ata_device *adev)
1512 {
1513 if (adev->dma_mode >= XFER_UDMA_0 && adev->dma_mode <= XFER_UDMA_7)
1514 return 1;
1515 return 0;
1516 }
1517
1518 static inline int ata_dma_enabled(struct ata_device *adev)
1519 {
1520 return (adev->dma_mode == 0xFF ? 0 : 1);
1521 }
1522
1523 /**************************************************************************
1524 * PMP - drivers/ata/libata-pmp.c
1525 */
1526 #ifdef CONFIG_SATA_PMP
1527
1528 extern const struct ata_port_operations sata_pmp_port_ops;
1529
1530 extern int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc);
1531 extern void sata_pmp_error_handler(struct ata_port *ap);
1532
1533 #else /* CONFIG_SATA_PMP */
1534
1535 #define sata_pmp_port_ops sata_port_ops
1536 #define sata_pmp_qc_defer_cmd_switch ata_std_qc_defer
1537 #define sata_pmp_error_handler ata_std_error_handler
1538
1539 #endif /* CONFIG_SATA_PMP */
1540
1541
1542 /**************************************************************************
1543 * SFF - drivers/ata/libata-sff.c
1544 */
1545 #ifdef CONFIG_ATA_SFF
1546
1547 extern const struct ata_port_operations ata_sff_port_ops;
1548 extern const struct ata_port_operations ata_bmdma_port_ops;
1549 extern const struct ata_port_operations ata_bmdma32_port_ops;
1550
1551 /* PIO only, sg_tablesize and dma_boundary limits can be removed */
1552 #define ATA_PIO_SHT(drv_name) \
1553 ATA_BASE_SHT(drv_name), \
1554 .sg_tablesize = LIBATA_MAX_PRD, \
1555 .dma_boundary = ATA_DMA_BOUNDARY
1556
1557 #define ATA_BMDMA_SHT(drv_name) \
1558 ATA_BASE_SHT(drv_name), \
1559 .sg_tablesize = LIBATA_MAX_PRD, \
1560 .dma_boundary = ATA_DMA_BOUNDARY
1561
1562 extern void ata_sff_qc_prep(struct ata_queued_cmd *qc);
1563 extern void ata_sff_dumb_qc_prep(struct ata_queued_cmd *qc);
1564 extern void ata_sff_dev_select(struct ata_port *ap, unsigned int device);
1565 extern u8 ata_sff_check_status(struct ata_port *ap);
1566 extern void ata_sff_pause(struct ata_port *ap);
1567 extern void ata_sff_dma_pause(struct ata_port *ap);
1568 extern int ata_sff_busy_sleep(struct ata_port *ap,
1569 unsigned long timeout_pat, unsigned long timeout);
1570 extern int ata_sff_wait_ready(struct ata_link *link, unsigned long deadline);
1571 extern void ata_sff_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
1572 extern void ata_sff_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
1573 extern void ata_sff_exec_command(struct ata_port *ap,
1574 const struct ata_taskfile *tf);
1575 extern unsigned int ata_sff_data_xfer(struct ata_device *dev,
1576 unsigned char *buf, unsigned int buflen, int rw);
1577 extern unsigned int ata_sff_data_xfer32(struct ata_device *dev,
1578 unsigned char *buf, unsigned int buflen, int rw);
1579 extern unsigned int ata_sff_data_xfer_noirq(struct ata_device *dev,
1580 unsigned char *buf, unsigned int buflen, int rw);
1581 extern u8 ata_sff_irq_on(struct ata_port *ap);
1582 extern void ata_sff_irq_clear(struct ata_port *ap);
1583 extern int ata_sff_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
1584 u8 status, int in_wq);
1585 extern unsigned int ata_sff_qc_issue(struct ata_queued_cmd *qc);
1586 extern bool ata_sff_qc_fill_rtf(struct ata_queued_cmd *qc);
1587 extern unsigned int ata_sff_host_intr(struct ata_port *ap,
1588 struct ata_queued_cmd *qc);
1589 extern irqreturn_t ata_sff_interrupt(int irq, void *dev_instance);
1590 extern void ata_sff_lost_interrupt(struct ata_port *ap);
1591 extern void ata_sff_freeze(struct ata_port *ap);
1592 extern void ata_sff_thaw(struct ata_port *ap);
1593 extern int ata_sff_prereset(struct ata_link *link, unsigned long deadline);
1594 extern unsigned int ata_sff_dev_classify(struct ata_device *dev, int present,
1595 u8 *r_err);
1596 extern int ata_sff_wait_after_reset(struct ata_link *link, unsigned int devmask,
1597 unsigned long deadline);
1598 extern int ata_sff_softreset(struct ata_link *link, unsigned int *classes,
1599 unsigned long deadline);
1600 extern int sata_sff_hardreset(struct ata_link *link, unsigned int *class,
1601 unsigned long deadline);
1602 extern void ata_sff_postreset(struct ata_link *link, unsigned int *classes);
1603 extern void ata_sff_drain_fifo(struct ata_queued_cmd *qc);
1604 extern void ata_sff_error_handler(struct ata_port *ap);
1605 extern void ata_sff_post_internal_cmd(struct ata_queued_cmd *qc);
1606 extern int ata_sff_port_start(struct ata_port *ap);
1607 extern int ata_sff_port_start32(struct ata_port *ap);
1608 extern void ata_sff_std_ports(struct ata_ioports *ioaddr);
1609 extern unsigned long ata_bmdma_mode_filter(struct ata_device *dev,
1610 unsigned long xfer_mask);
1611 extern void ata_bmdma_setup(struct ata_queued_cmd *qc);
1612 extern void ata_bmdma_start(struct ata_queued_cmd *qc);
1613 extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
1614 extern u8 ata_bmdma_status(struct ata_port *ap);
1615 extern void ata_bus_reset(struct ata_port *ap);
1616
1617 #ifdef CONFIG_PCI
1618 extern int ata_pci_bmdma_clear_simplex(struct pci_dev *pdev);
1619 extern int ata_pci_bmdma_init(struct ata_host *host);
1620 extern int ata_pci_sff_init_host(struct ata_host *host);
1621 extern int ata_pci_sff_prepare_host(struct pci_dev *pdev,
1622 const struct ata_port_info * const * ppi,
1623 struct ata_host **r_host);
1624 extern int ata_pci_sff_activate_host(struct ata_host *host,
1625 irq_handler_t irq_handler,
1626 struct scsi_host_template *sht);
1627 extern int ata_pci_sff_init_one(struct pci_dev *pdev,
1628 const struct ata_port_info * const * ppi,
1629 struct scsi_host_template *sht, void *host_priv);
1630 #endif /* CONFIG_PCI */
1631
1632 /**
1633 * ata_sff_busy_wait - Wait for a port status register
1634 * @ap: Port to wait for.
1635 * @bits: bits that must be clear
1636 * @max: number of 10uS waits to perform
1637 *
1638 * Waits up to max*10 microseconds for the selected bits in the port's
1639 * status register to be cleared.
1640 * Returns final value of status register.
1641 *
1642 * LOCKING:
1643 * Inherited from caller.
1644 */
1645 static inline u8 ata_sff_busy_wait(struct ata_port *ap, unsigned int bits,
1646 unsigned int max)
1647 {
1648 u8 status;
1649
1650 do {
1651 udelay(10);
1652 status = ap->ops->sff_check_status(ap);
1653 max--;
1654 } while (status != 0xff && (status & bits) && (max > 0));
1655
1656 return status;
1657 }
1658
1659 /**
1660 * ata_wait_idle - Wait for a port to be idle.
1661 * @ap: Port to wait for.
1662 *
1663 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
1664 * Returns final value of status register.
1665 *
1666 * LOCKING:
1667 * Inherited from caller.
1668 */
1669 static inline u8 ata_wait_idle(struct ata_port *ap)
1670 {
1671 u8 status = ata_sff_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
1672
1673 #ifdef ATA_DEBUG
1674 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ)))
1675 ata_port_printk(ap, KERN_DEBUG, "abnormal Status 0x%X\n",
1676 status);
1677 #endif
1678
1679 return status;
1680 }
1681 #endif /* CONFIG_ATA_SFF */
1682
1683 #endif /* __LINUX_LIBATA_H__ */
linux 2.6 git repository for openrd