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