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