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Linux 2.6.33-rc2
[pohmelfs.git] / include / linux / libata.h
blob6a9c4ddd3d95bf08bf57c807a791f600f128d808
1 /*
2 * Copyright 2003-2005 Red Hat, Inc. All rights reserved.
3 * Copyright 2003-2005 Jeff Garzik
4 *
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2, or (at your option)
9 * any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; see the file COPYING. If not, write to
18 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
19 *
20 *
21 * libata documentation is available via 'make {ps|pdf}docs',
22 * as Documentation/DocBook/libata.*
23 *
24 */
25
26 #ifndef __LINUX_LIBATA_H__
27 #define __LINUX_LIBATA_H__
28
29 #include <linux/delay.h>
30 #include <linux/jiffies.h>
31 #include <linux/interrupt.h>
32 #include <linux/dma-mapping.h>
33 #include <linux/scatterlist.h>
34 #include <linux/io.h>
35 #include <linux/ata.h>
36 #include <linux/workqueue.h>
37 #include <scsi/scsi_host.h>
38 #include <linux/acpi.h>
39 #include <linux/cdrom.h>
40
41 /*
42 * Define if arch has non-standard setup. This is a _PCI_ standard
43 * not a legacy or ISA standard.
44 */
45 #ifdef CONFIG_ATA_NONSTANDARD
46 #include <asm/libata-portmap.h>
47 #else
48 #include <asm-generic/libata-portmap.h>
49 #endif
50
51 /*
52 * compile-time options: to be removed as soon as all the drivers are
53 * converted to the new debugging mechanism
54 */
55 #undef ATA_DEBUG /* debugging output */
56 #undef ATA_VERBOSE_DEBUG /* yet more debugging output */
57 #undef ATA_IRQ_TRAP /* define to ack screaming irqs */
58 #undef ATA_NDEBUG /* define to disable quick runtime checks */
59
60
61 /* note: prints function name for you */
62 #ifdef ATA_DEBUG
63 #define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args)
64 #ifdef ATA_VERBOSE_DEBUG
65 #define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args)
66 #else
67 #define VPRINTK(fmt, args...)
68 #endif /* ATA_VERBOSE_DEBUG */
69 #else
70 #define DPRINTK(fmt, args...)
71 #define VPRINTK(fmt, args...)
72 #endif /* ATA_DEBUG */
73
74 #define BPRINTK(fmt, args...) if (ap->flags & ATA_FLAG_DEBUGMSG) printk(KERN_ERR "%s: " fmt, __func__, ## args)
75
76 /* NEW: debug levels */
77 #define HAVE_LIBATA_MSG 1
78
79 enum {
80 ATA_MSG_DRV = 0x0001,
81 ATA_MSG_INFO = 0x0002,
82 ATA_MSG_PROBE = 0x0004,
83 ATA_MSG_WARN = 0x0008,
84 ATA_MSG_MALLOC = 0x0010,
85 ATA_MSG_CTL = 0x0020,
86 ATA_MSG_INTR = 0x0040,
87 ATA_MSG_ERR = 0x0080,
88 };
89
90 #define ata_msg_drv(p) ((p)->msg_enable & ATA_MSG_DRV)
91 #define ata_msg_info(p) ((p)->msg_enable & ATA_MSG_INFO)
92 #define ata_msg_probe(p) ((p)->msg_enable & ATA_MSG_PROBE)
93 #define ata_msg_warn(p) ((p)->msg_enable & ATA_MSG_WARN)
94 #define ata_msg_malloc(p) ((p)->msg_enable & ATA_MSG_MALLOC)
95 #define ata_msg_ctl(p) ((p)->msg_enable & ATA_MSG_CTL)
96 #define ata_msg_intr(p) ((p)->msg_enable & ATA_MSG_INTR)
97 #define ata_msg_err(p) ((p)->msg_enable & ATA_MSG_ERR)
98
99 static inline u32 ata_msg_init(int dval, int default_msg_enable_bits)
100 {
101 if (dval < 0 || dval >= (sizeof(u32) * 8))
102 return default_msg_enable_bits; /* should be 0x1 - only driver info msgs */
103 if (!dval)
104 return 0;
105 return (1 << dval) - 1;
106 }
107
108 /* defines only for the constants which don't work well as enums */
109 #define ATA_TAG_POISON 0xfafbfcfdU
110
111 enum {
112 /* various global constants */
113 LIBATA_MAX_PRD = ATA_MAX_PRD / 2,
114 LIBATA_DUMB_MAX_PRD = ATA_MAX_PRD / 4, /* Worst case */
115 ATA_DEF_QUEUE = 1,
116 /* tag ATA_MAX_QUEUE - 1 is reserved for internal commands */
117 ATA_MAX_QUEUE = 32,
118 ATA_TAG_INTERNAL = ATA_MAX_QUEUE - 1,
119 ATA_SHORT_PAUSE = 16,
120
121 ATAPI_MAX_DRAIN = 16 << 10,
122
123 ATA_ALL_DEVICES = (1 << ATA_MAX_DEVICES) - 1,
124
125 ATA_SHT_EMULATED = 1,
126 ATA_SHT_CMD_PER_LUN = 1,
127 ATA_SHT_THIS_ID = -1,
128 ATA_SHT_USE_CLUSTERING = 1,
129
130 /* struct ata_device stuff */
131 ATA_DFLAG_LBA = (1 << 0), /* device supports LBA */
132 ATA_DFLAG_LBA48 = (1 << 1), /* device supports LBA48 */
133 ATA_DFLAG_CDB_INTR = (1 << 2), /* device asserts INTRQ when ready for CDB */
134 ATA_DFLAG_NCQ = (1 << 3), /* device supports NCQ */
135 ATA_DFLAG_FLUSH_EXT = (1 << 4), /* do FLUSH_EXT instead of FLUSH */
136 ATA_DFLAG_ACPI_PENDING = (1 << 5), /* ACPI resume action pending */
137 ATA_DFLAG_ACPI_FAILED = (1 << 6), /* ACPI on devcfg has failed */
138 ATA_DFLAG_AN = (1 << 7), /* AN configured */
139 ATA_DFLAG_HIPM = (1 << 8), /* device supports HIPM */
140 ATA_DFLAG_DIPM = (1 << 9), /* device supports DIPM */
141 ATA_DFLAG_DMADIR = (1 << 10), /* device requires DMADIR */
142 ATA_DFLAG_CFG_MASK = (1 << 12) - 1,
143
144 ATA_DFLAG_PIO = (1 << 12), /* device limited to PIO mode */
145 ATA_DFLAG_NCQ_OFF = (1 << 13), /* device limited to non-NCQ mode */
146 ATA_DFLAG_SLEEPING = (1 << 15), /* device is sleeping */
147 ATA_DFLAG_DUBIOUS_XFER = (1 << 16), /* data transfer not verified */
148 ATA_DFLAG_NO_UNLOAD = (1 << 17), /* device doesn't support unload */
149 ATA_DFLAG_INIT_MASK = (1 << 24) - 1,
150
151 ATA_DFLAG_DETACH = (1 << 24),
152 ATA_DFLAG_DETACHED = (1 << 25),
153
154 ATA_DEV_UNKNOWN = 0, /* unknown device */
155 ATA_DEV_ATA = 1, /* ATA device */
156 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */
157 ATA_DEV_ATAPI = 3, /* ATAPI device */
158 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */
159 ATA_DEV_PMP = 5, /* SATA port multiplier */
160 ATA_DEV_PMP_UNSUP = 6, /* SATA port multiplier (unsupported) */
161 ATA_DEV_SEMB = 7, /* SEMB */
162 ATA_DEV_SEMB_UNSUP = 8, /* SEMB (unsupported) */
163 ATA_DEV_NONE = 9, /* no device */
164
165 /* struct ata_link flags */
166 ATA_LFLAG_NO_HRST = (1 << 1), /* avoid hardreset */
167 ATA_LFLAG_NO_SRST = (1 << 2), /* avoid softreset */
168 ATA_LFLAG_ASSUME_ATA = (1 << 3), /* assume ATA class */
169 ATA_LFLAG_ASSUME_SEMB = (1 << 4), /* assume SEMB class */
170 ATA_LFLAG_ASSUME_CLASS = ATA_LFLAG_ASSUME_ATA | ATA_LFLAG_ASSUME_SEMB,
171 ATA_LFLAG_NO_RETRY = (1 << 5), /* don't retry this link */
172 ATA_LFLAG_DISABLED = (1 << 6), /* link is disabled */
173 ATA_LFLAG_SW_ACTIVITY = (1 << 7), /* keep activity stats */
174
175 /* struct ata_port flags */
176 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */
177 /* (doesn't imply presence) */
178 ATA_FLAG_SATA = (1 << 1),
179 ATA_FLAG_NO_LEGACY = (1 << 2), /* no legacy mode check */
180 ATA_FLAG_MMIO = (1 << 3), /* use MMIO, not PIO */
181 ATA_FLAG_SRST = (1 << 4), /* (obsolete) use ATA SRST, not E.D.D. */
182 ATA_FLAG_SATA_RESET = (1 << 5), /* (obsolete) use COMRESET */
183 ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */
184 ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */
185 ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */
186 ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD
187 * doesn't handle PIO interrupts */
188 ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */
189 ATA_FLAG_NO_POWEROFF_SPINDOWN = (1 << 11), /* don't spindown before poweroff */
190 ATA_FLAG_NO_HIBERNATE_SPINDOWN = (1 << 12), /* don't spindown before hibernation */
191 ATA_FLAG_DEBUGMSG = (1 << 13),
192 ATA_FLAG_FPDMA_AA = (1 << 14), /* driver supports Auto-Activate */
193 ATA_FLAG_IGN_SIMPLEX = (1 << 15), /* ignore SIMPLEX */
194 ATA_FLAG_NO_IORDY = (1 << 16), /* controller lacks iordy */
195 ATA_FLAG_ACPI_SATA = (1 << 17), /* need native SATA ACPI layout */
196 ATA_FLAG_AN = (1 << 18), /* controller supports AN */
197 ATA_FLAG_PMP = (1 << 19), /* controller supports PMP */
198 ATA_FLAG_IPM = (1 << 20), /* driver can handle IPM */
199 ATA_FLAG_EM = (1 << 21), /* driver supports enclosure
200 * management */
201 ATA_FLAG_SW_ACTIVITY = (1 << 22), /* driver supports sw activity
202 * led */
203
204 /* The following flag belongs to ap->pflags but is kept in
205 * ap->flags because it's referenced in many LLDs and will be
206 * removed in not-too-distant future.
207 */
208 ATA_FLAG_DISABLED = (1 << 23), /* port is disabled, ignore it */
209
210 /* bits 24:31 of ap->flags are reserved for LLD specific flags */
211
212
213 /* struct ata_port pflags */
214 ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */
215 ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */
216 ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */
217 ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */
218 ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */
219 ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */
220 ATA_PFLAG_INITIALIZING = (1 << 7), /* being initialized, don't touch */
221 ATA_PFLAG_RESETTING = (1 << 8), /* reset in progress */
222 ATA_PFLAG_UNLOADING = (1 << 9), /* driver is being unloaded */
223 ATA_PFLAG_UNLOADED = (1 << 10), /* driver is unloaded */
224
225 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */
226 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */
227 ATA_PFLAG_INIT_GTM_VALID = (1 << 19), /* initial gtm data valid */
228
229 ATA_PFLAG_PIO32 = (1 << 20), /* 32bit PIO */
230 ATA_PFLAG_PIO32CHANGE = (1 << 21), /* 32bit PIO can be turned on/off */
231
232 /* struct ata_queued_cmd flags */
233 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */
234 ATA_QCFLAG_DMAMAP = (1 << 1), /* SG table is DMA mapped */
235 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */
236 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */
237 ATA_QCFLAG_CLEAR_EXCL = (1 << 5), /* clear excl_link on completion */
238 ATA_QCFLAG_QUIET = (1 << 6), /* don't report device error */
239 ATA_QCFLAG_RETRY = (1 << 7), /* retry after failure */
240
241 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */
242 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */
243 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */
244
245 /* host set flags */
246 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */
247 ATA_HOST_STARTED = (1 << 1), /* Host started */
248 ATA_HOST_PARALLEL_SCAN = (1 << 2), /* Ports on this host can be scanned in parallel */
249
250 /* bits 24:31 of host->flags are reserved for LLD specific flags */
251
252 /* various lengths of time */
253 ATA_TMOUT_BOOT = 30000, /* heuristic */
254 ATA_TMOUT_BOOT_QUICK = 7000, /* heuristic */
255 ATA_TMOUT_INTERNAL_QUICK = 5000,
256 ATA_TMOUT_MAX_PARK = 30000,
257
258 /* FIXME: GoVault needs 2s but we can't afford that without
259 * parallel probing. 800ms is enough for iVDR disk
260 * HHD424020F7SV00. Increase to 2secs when parallel probing
261 * is in place.
262 */
263 ATA_TMOUT_FF_WAIT = 800,
264
265 /* Spec mandates to wait for ">= 2ms" before checking status
266 * after reset. We wait 150ms, because that was the magic
267 * delay used for ATAPI devices in Hale Landis's ATADRVR, for
268 * the period of time between when the ATA command register is
269 * written, and then status is checked. Because waiting for
270 * "a while" before checking status is fine, post SRST, we
271 * perform this magic delay here as well.
272 *
273 * Old drivers/ide uses the 2mS rule and then waits for ready.
274 */
275 ATA_WAIT_AFTER_RESET = 150,
276
277 /* If PMP is supported, we have to do follow-up SRST. As some
278 * PMPs don't send D2H Reg FIS after hardreset, LLDs are
279 * advised to wait only for the following duration before
280 * doing SRST.
281 */
282 ATA_TMOUT_PMP_SRST_WAIT = 5000,
283
284 /* ATA bus states */
285 BUS_UNKNOWN = 0,
286 BUS_DMA = 1,
287 BUS_IDLE = 2,
288 BUS_NOINTR = 3,
289 BUS_NODATA = 4,
290 BUS_TIMER = 5,
291 BUS_PIO = 6,
292 BUS_EDD = 7,
293 BUS_IDENTIFY = 8,
294 BUS_PACKET = 9,
295
296 /* SATA port states */
297 PORT_UNKNOWN = 0,
298 PORT_ENABLED = 1,
299 PORT_DISABLED = 2,
300
301 /* encoding various smaller bitmaps into a single
302 * unsigned long bitmap
303 */
304 ATA_NR_PIO_MODES = 7,
305 ATA_NR_MWDMA_MODES = 5,
306 ATA_NR_UDMA_MODES = 8,
307
308 ATA_SHIFT_PIO = 0,
309 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_NR_PIO_MODES,
310 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_NR_MWDMA_MODES,
311
312 /* size of buffer to pad xfers ending on unaligned boundaries */
313 ATA_DMA_PAD_SZ = 4,
314
315 /* ering size */
316 ATA_ERING_SIZE = 32,
317
318 /* return values for ->qc_defer */
319 ATA_DEFER_LINK = 1,
320 ATA_DEFER_PORT = 2,
321
322 /* desc_len for ata_eh_info and context */
323 ATA_EH_DESC_LEN = 80,
324
325 /* reset / recovery action types */
326 ATA_EH_REVALIDATE = (1 << 0),
327 ATA_EH_SOFTRESET = (1 << 1), /* meaningful only in ->prereset */
328 ATA_EH_HARDRESET = (1 << 2), /* meaningful only in ->prereset */
329 ATA_EH_RESET = ATA_EH_SOFTRESET | ATA_EH_HARDRESET,
330 ATA_EH_ENABLE_LINK = (1 << 3),
331 ATA_EH_LPM = (1 << 4), /* link power management action */
332 ATA_EH_PARK = (1 << 5), /* unload heads and stop I/O */
333
334 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE | ATA_EH_PARK,
335 ATA_EH_ALL_ACTIONS = ATA_EH_REVALIDATE | ATA_EH_RESET |
336 ATA_EH_ENABLE_LINK | ATA_EH_LPM,
337
338 /* ata_eh_info->flags */
339 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */
340 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */
341 ATA_EHI_QUIET = (1 << 3), /* be quiet */
342
343 ATA_EHI_DID_SOFTRESET = (1 << 16), /* already soft-reset this port */
344 ATA_EHI_DID_HARDRESET = (1 << 17), /* already soft-reset this port */
345 ATA_EHI_PRINTINFO = (1 << 18), /* print configuration info */
346 ATA_EHI_SETMODE = (1 << 19), /* configure transfer mode */
347 ATA_EHI_POST_SETMODE = (1 << 20), /* revaildating after setmode */
348
349 ATA_EHI_DID_RESET = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET,
350
351 /* mask of flags to transfer *to* the slave link */
352 ATA_EHI_TO_SLAVE_MASK = ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET,
353
354 /* max tries if error condition is still set after ->error_handler */
355 ATA_EH_MAX_TRIES = 5,
356
357 /* how hard are we gonna try to probe/recover devices */
358 ATA_PROBE_MAX_TRIES = 3,
359 ATA_EH_DEV_TRIES = 3,
360 ATA_EH_PMP_TRIES = 5,
361 ATA_EH_PMP_LINK_TRIES = 3,
362
363 SATA_PMP_RW_TIMEOUT = 3000, /* PMP read/write timeout */
364
365 /* This should match the actual table size of
366 * ata_eh_cmd_timeout_table in libata-eh.c.
367 */
368 ATA_EH_CMD_TIMEOUT_TABLE_SIZE = 6,
369
370 /* Horkage types. May be set by libata or controller on drives
371 (some horkage may be drive/controller pair dependant */
372
373 ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */
374 ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */
375 ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */
376 ATA_HORKAGE_MAX_SEC_128 = (1 << 3), /* Limit max sects to 128 */
377 ATA_HORKAGE_BROKEN_HPA = (1 << 4), /* Broken HPA */
378 ATA_HORKAGE_DISABLE = (1 << 5), /* Disable it */
379 ATA_HORKAGE_HPA_SIZE = (1 << 6), /* native size off by one */
380 ATA_HORKAGE_IPM = (1 << 7), /* Link PM problems */
381 ATA_HORKAGE_IVB = (1 << 8), /* cbl det validity bit bugs */
382 ATA_HORKAGE_STUCK_ERR = (1 << 9), /* stuck ERR on next PACKET */
383 ATA_HORKAGE_BRIDGE_OK = (1 << 10), /* no bridge limits */
384 ATA_HORKAGE_ATAPI_MOD16_DMA = (1 << 11), /* use ATAPI DMA for commands
385 not multiple of 16 bytes */
386 ATA_HORKAGE_FIRMWARE_WARN = (1 << 12), /* firmware update warning */
387 ATA_HORKAGE_1_5_GBPS = (1 << 13), /* force 1.5 Gbps */
388 ATA_HORKAGE_NOSETXFER = (1 << 14), /* skip SETXFER, SATA only */
389 ATA_HORKAGE_BROKEN_FPDMA_AA = (1 << 15), /* skip AA */
390
391 /* DMA mask for user DMA control: User visible values; DO NOT
392 renumber */
393 ATA_DMA_MASK_ATA = (1 << 0), /* DMA on ATA Disk */
394 ATA_DMA_MASK_ATAPI = (1 << 1), /* DMA on ATAPI */
395 ATA_DMA_MASK_CFA = (1 << 2), /* DMA on CF Card */
396
397 /* ATAPI command types */
398 ATAPI_READ = 0, /* READs */
399 ATAPI_WRITE = 1, /* WRITEs */
400 ATAPI_READ_CD = 2, /* READ CD [MSF] */
401 ATAPI_PASS_THRU = 3, /* SAT pass-thru */
402 ATAPI_MISC = 4, /* the rest */
403
404 /* Timing constants */
405 ATA_TIMING_SETUP = (1 << 0),
406 ATA_TIMING_ACT8B = (1 << 1),
407 ATA_TIMING_REC8B = (1 << 2),
408 ATA_TIMING_CYC8B = (1 << 3),
409 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
410 ATA_TIMING_CYC8B,
411 ATA_TIMING_ACTIVE = (1 << 4),
412 ATA_TIMING_RECOVER = (1 << 5),
413 ATA_TIMING_DMACK_HOLD = (1 << 6),
414 ATA_TIMING_CYCLE = (1 << 7),
415 ATA_TIMING_UDMA = (1 << 8),
416 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
417 ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
418 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
419 ATA_TIMING_DMACK_HOLD | ATA_TIMING_CYCLE |
420 ATA_TIMING_UDMA,
421
422 /* ACPI constants */
423 ATA_ACPI_FILTER_SETXFER = 1 << 0,
424 ATA_ACPI_FILTER_LOCK = 1 << 1,
425 ATA_ACPI_FILTER_DIPM = 1 << 2,
426 ATA_ACPI_FILTER_FPDMA_OFFSET = 1 << 3, /* FPDMA non-zero offset */
427 ATA_ACPI_FILTER_FPDMA_AA = 1 << 4, /* FPDMA auto activate */
428
429 ATA_ACPI_FILTER_DEFAULT = ATA_ACPI_FILTER_SETXFER |
430 ATA_ACPI_FILTER_LOCK |
431 ATA_ACPI_FILTER_DIPM,
432 };
433
434 enum ata_xfer_mask {
435 ATA_MASK_PIO = ((1LU << ATA_NR_PIO_MODES) - 1)
436 << ATA_SHIFT_PIO,
437 ATA_MASK_MWDMA = ((1LU << ATA_NR_MWDMA_MODES) - 1)
438 << ATA_SHIFT_MWDMA,
439 ATA_MASK_UDMA = ((1LU << ATA_NR_UDMA_MODES) - 1)
440 << ATA_SHIFT_UDMA,
441 };
442
443 enum hsm_task_states {
444 HSM_ST_IDLE, /* no command on going */
445 HSM_ST_FIRST, /* (waiting the device to)
446 write CDB or first data block */
447 HSM_ST, /* (waiting the device to) transfer data */
448 HSM_ST_LAST, /* (waiting the device to) complete command */
449 HSM_ST_ERR, /* error */
450 };
451
452 enum ata_completion_errors {
453 AC_ERR_DEV = (1 << 0), /* device reported error */
454 AC_ERR_HSM = (1 << 1), /* host state machine violation */
455 AC_ERR_TIMEOUT = (1 << 2), /* timeout */
456 AC_ERR_MEDIA = (1 << 3), /* media error */
457 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */
458 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */
459 AC_ERR_SYSTEM = (1 << 6), /* system error */
460 AC_ERR_INVALID = (1 << 7), /* invalid argument */
461 AC_ERR_OTHER = (1 << 8), /* unknown */
462 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */
463 AC_ERR_NCQ = (1 << 10), /* marker for offending NCQ qc */
464 };
465
466 /* forward declarations */
467 struct scsi_device;
468 struct ata_port_operations;
469 struct ata_port;
470 struct ata_link;
471 struct ata_queued_cmd;
472
473 /* typedefs */
474 typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
475 typedef int (*ata_prereset_fn_t)(struct ata_link *link, unsigned long deadline);
476 typedef int (*ata_reset_fn_t)(struct ata_link *link, unsigned int *classes,
477 unsigned long deadline);
478 typedef void (*ata_postreset_fn_t)(struct ata_link *link, unsigned int *classes);
479
480 /*
481 * host pm policy: If you alter this, you also need to alter libata-scsi.c
482 * (for the ascii descriptions)
483 */
484 enum link_pm {
485 NOT_AVAILABLE,
486 MIN_POWER,
487 MAX_PERFORMANCE,
488 MEDIUM_POWER,
489 };
490 extern struct device_attribute dev_attr_link_power_management_policy;
491 extern struct device_attribute dev_attr_unload_heads;
492 extern struct device_attribute dev_attr_em_message_type;
493 extern struct device_attribute dev_attr_em_message;
494 extern struct device_attribute dev_attr_sw_activity;
495
496 enum sw_activity {
497 OFF,
498 BLINK_ON,
499 BLINK_OFF,
500 };
501
502 #ifdef CONFIG_ATA_SFF
503 struct ata_ioports {
504 void __iomem *cmd_addr;
505 void __iomem *data_addr;
506 void __iomem *error_addr;
507 void __iomem *feature_addr;
508 void __iomem *nsect_addr;
509 void __iomem *lbal_addr;
510 void __iomem *lbam_addr;
511 void __iomem *lbah_addr;
512 void __iomem *device_addr;
513 void __iomem *status_addr;
514 void __iomem *command_addr;
515 void __iomem *altstatus_addr;
516 void __iomem *ctl_addr;
517 void __iomem *bmdma_addr;
518 void __iomem *scr_addr;
519 };
520 #endif /* CONFIG_ATA_SFF */
521
522 struct ata_host {
523 spinlock_t lock;
524 struct device *dev;
525 void __iomem * const *iomap;
526 unsigned int n_ports;
527 void *private_data;
528 struct ata_port_operations *ops;
529 unsigned long flags;
530 #ifdef CONFIG_ATA_ACPI
531 acpi_handle acpi_handle;
532 #endif
533 struct ata_port *simplex_claimed; /* channel owning the DMA */
534 struct ata_port *ports[0];
535 };
536
537 struct ata_queued_cmd {
538 struct ata_port *ap;
539 struct ata_device *dev;
540
541 struct scsi_cmnd *scsicmd;
542 void (*scsidone)(struct scsi_cmnd *);
543
544 struct ata_taskfile tf;
545 u8 cdb[ATAPI_CDB_LEN];
546
547 unsigned long flags; /* ATA_QCFLAG_xxx */
548 unsigned int tag;
549 unsigned int n_elem;
550 unsigned int orig_n_elem;
551
552 int dma_dir;
553
554 unsigned int sect_size;
555
556 unsigned int nbytes;
557 unsigned int extrabytes;
558 unsigned int curbytes;
559
560 struct scatterlist *cursg;
561 unsigned int cursg_ofs;
562
563 struct scatterlist sgent;
564
565 struct scatterlist *sg;
566
567 unsigned int err_mask;
568 struct ata_taskfile result_tf;
569 ata_qc_cb_t complete_fn;
570
571 void *private_data;
572 void *lldd_task;
573 };
574
575 struct ata_port_stats {
576 unsigned long unhandled_irq;
577 unsigned long idle_irq;
578 unsigned long rw_reqbuf;
579 };
580
581 struct ata_ering_entry {
582 unsigned int eflags;
583 unsigned int err_mask;
584 u64 timestamp;
585 };
586
587 struct ata_ering {
588 int cursor;
589 struct ata_ering_entry ring[ATA_ERING_SIZE];
590 };
591
592 struct ata_device {
593 struct ata_link *link;
594 unsigned int devno; /* 0 or 1 */
595 unsigned int horkage; /* List of broken features */
596 unsigned long flags; /* ATA_DFLAG_xxx */
597 struct scsi_device *sdev; /* attached SCSI device */
598 void *private_data;
599 #ifdef CONFIG_ATA_ACPI
600 acpi_handle acpi_handle;
601 union acpi_object *gtf_cache;
602 unsigned int gtf_filter;
603 #endif
604 /* n_sector is CLEAR_BEGIN, read comment above CLEAR_BEGIN */
605 u64 n_sectors; /* size of device, if ATA */
606 u64 n_native_sectors; /* native size, if ATA */
607 unsigned int class; /* ATA_DEV_xxx */
608 unsigned long unpark_deadline;
609
610 u8 pio_mode;
611 u8 dma_mode;
612 u8 xfer_mode;
613 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
614
615 unsigned int multi_count; /* sectors count for
616 READ/WRITE MULTIPLE */
617 unsigned int max_sectors; /* per-device max sectors */
618 unsigned int cdb_len;
619
620 /* per-dev xfer mask */
621 unsigned long pio_mask;
622 unsigned long mwdma_mask;
623 unsigned long udma_mask;
624
625 /* for CHS addressing */
626 u16 cylinders; /* Number of cylinders */
627 u16 heads; /* Number of heads */
628 u16 sectors; /* Number of sectors per track */
629
630 union {
631 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
632 u32 gscr[SATA_PMP_GSCR_DWORDS]; /* PMP GSCR block */
633 };
634
635 /* error history */
636 int spdn_cnt;
637 /* ering is CLEAR_END, read comment above CLEAR_END */
638 struct ata_ering ering;
639 };
640
641 /* Fields between ATA_DEVICE_CLEAR_BEGIN and ATA_DEVICE_CLEAR_END are
642 * cleared to zero on ata_dev_init().
643 */
644 #define ATA_DEVICE_CLEAR_BEGIN offsetof(struct ata_device, n_sectors)
645 #define ATA_DEVICE_CLEAR_END offsetof(struct ata_device, ering)
646
647 struct ata_eh_info {
648 struct ata_device *dev; /* offending device */
649 u32 serror; /* SError from LLDD */
650 unsigned int err_mask; /* port-wide err_mask */
651 unsigned int action; /* ATA_EH_* action mask */
652 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */
653 unsigned int flags; /* ATA_EHI_* flags */
654
655 unsigned int probe_mask;
656
657 char desc[ATA_EH_DESC_LEN];
658 int desc_len;
659 };
660
661 struct ata_eh_context {
662 struct ata_eh_info i;
663 int tries[ATA_MAX_DEVICES];
664 int cmd_timeout_idx[ATA_MAX_DEVICES]
665 [ATA_EH_CMD_TIMEOUT_TABLE_SIZE];
666 unsigned int classes[ATA_MAX_DEVICES];
667 unsigned int did_probe_mask;
668 unsigned int unloaded_mask;
669 unsigned int saved_ncq_enabled;
670 u8 saved_xfer_mode[ATA_MAX_DEVICES];
671 /* timestamp for the last reset attempt or success */
672 unsigned long last_reset;
673 };
674
675 struct ata_acpi_drive
676 {
677 u32 pio;
678 u32 dma;
679 } __packed;
680
681 struct ata_acpi_gtm {
682 struct ata_acpi_drive drive[2];
683 u32 flags;
684 } __packed;
685
686 struct ata_link {
687 struct ata_port *ap;
688 int pmp; /* port multiplier port # */
689
690 unsigned int active_tag; /* active tag on this link */
691 u32 sactive; /* active NCQ commands */
692
693 unsigned int flags; /* ATA_LFLAG_xxx */
694
695 u32 saved_scontrol; /* SControl on probe */
696 unsigned int hw_sata_spd_limit;
697 unsigned int sata_spd_limit;
698 unsigned int sata_spd; /* current SATA PHY speed */
699
700 /* record runtime error info, protected by host_set lock */
701 struct ata_eh_info eh_info;
702 /* EH context */
703 struct ata_eh_context eh_context;
704
705 struct ata_device device[ATA_MAX_DEVICES];
706 };
707
708 struct ata_port {
709 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */
710 struct ata_port_operations *ops;
711 spinlock_t *lock;
712 /* Flags owned by the EH context. Only EH should touch these once the
713 port is active */
714 unsigned long flags; /* ATA_FLAG_xxx */
715 /* Flags that change dynamically, protected by ap->lock */
716 unsigned int pflags; /* ATA_PFLAG_xxx */
717 unsigned int print_id; /* user visible unique port ID */
718 unsigned int port_no; /* 0 based port no. inside the host */
719
720 struct ata_prd *prd; /* our SG list */
721 dma_addr_t prd_dma; /* and its DMA mapping */
722
723 #ifdef CONFIG_ATA_SFF
724 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
725 #endif /* CONFIG_ATA_SFF */
726
727 u8 ctl; /* cache of ATA control register */
728 u8 last_ctl; /* Cache last written value */
729 unsigned int pio_mask;
730 unsigned int mwdma_mask;
731 unsigned int udma_mask;
732 unsigned int cbl; /* cable type; ATA_CBL_xxx */
733
734 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
735 unsigned long qc_allocated;
736 unsigned int qc_active;
737 int nr_active_links; /* #links with active qcs */
738
739 struct ata_link link; /* host default link */
740 struct ata_link *slave_link; /* see ata_slave_link_init() */
741
742 int nr_pmp_links; /* nr of available PMP links */
743 struct ata_link *pmp_link; /* array of PMP links */
744 struct ata_link *excl_link; /* for PMP qc exclusion */
745
746 struct ata_port_stats stats;
747 struct ata_host *host;
748 struct device *dev;
749
750 void *port_task_data;
751 struct delayed_work port_task;
752 struct delayed_work hotplug_task;
753 struct work_struct scsi_rescan_task;
754
755 unsigned int hsm_task_state;
756
757 u32 msg_enable;
758 struct list_head eh_done_q;
759 wait_queue_head_t eh_wait_q;
760 int eh_tries;
761 struct completion park_req_pending;
762
763 pm_message_t pm_mesg;
764 int *pm_result;
765 enum link_pm pm_policy;
766
767 struct timer_list fastdrain_timer;
768 unsigned long fastdrain_cnt;
769
770 int em_message_type;
771 void *private_data;
772
773 #ifdef CONFIG_ATA_ACPI
774 acpi_handle acpi_handle;
775 struct ata_acpi_gtm __acpi_init_gtm; /* use ata_acpi_init_gtm() */
776 #endif
777 /* owned by EH */
778 u8 sector_buf[ATA_SECT_SIZE] ____cacheline_aligned;
779 };
780
781 /* The following initializer overrides a method to NULL whether one of
782 * its parent has the method defined or not. This is equivalent to
783 * ERR_PTR(-ENOENT). Unfortunately, ERR_PTR doesn't render a constant
784 * expression and thus can't be used as an initializer.
785 */
786 #define ATA_OP_NULL (void *)(unsigned long)(-ENOENT)
787
788 struct ata_port_operations {
789 /*
790 * Command execution
791 */
792 int (*qc_defer)(struct ata_queued_cmd *qc);
793 int (*check_atapi_dma)(struct ata_queued_cmd *qc);
794 void (*qc_prep)(struct ata_queued_cmd *qc);
795 unsigned int (*qc_issue)(struct ata_queued_cmd *qc);
796 bool (*qc_fill_rtf)(struct ata_queued_cmd *qc);
797
798 /*
799 * Configuration and exception handling
800 */
801 int (*cable_detect)(struct ata_port *ap);
802 unsigned long (*mode_filter)(struct ata_device *dev, unsigned long xfer_mask);
803 void (*set_piomode)(struct ata_port *ap, struct ata_device *dev);
804 void (*set_dmamode)(struct ata_port *ap, struct ata_device *dev);
805 int (*set_mode)(struct ata_link *link, struct ata_device **r_failed_dev);
806 unsigned int (*read_id)(struct ata_device *dev, struct ata_taskfile *tf, u16 *id);
807
808 void (*dev_config)(struct ata_device *dev);
809
810 void (*freeze)(struct ata_port *ap);
811 void (*thaw)(struct ata_port *ap);
812 ata_prereset_fn_t prereset;
813 ata_reset_fn_t softreset;
814 ata_reset_fn_t hardreset;
815 ata_postreset_fn_t postreset;
816 ata_prereset_fn_t pmp_prereset;
817 ata_reset_fn_t pmp_softreset;
818 ata_reset_fn_t pmp_hardreset;
819 ata_postreset_fn_t pmp_postreset;
820 void (*error_handler)(struct ata_port *ap);
821 void (*lost_interrupt)(struct ata_port *ap);
822 void (*post_internal_cmd)(struct ata_queued_cmd *qc);
823
824 /*
825 * Optional features
826 */
827 int (*scr_read)(struct ata_link *link, unsigned int sc_reg, u32 *val);
828 int (*scr_write)(struct ata_link *link, unsigned int sc_reg, u32 val);
829 void (*pmp_attach)(struct ata_port *ap);
830 void (*pmp_detach)(struct ata_port *ap);
831 int (*enable_pm)(struct ata_port *ap, enum link_pm policy);
832 void (*disable_pm)(struct ata_port *ap);
833
834 /*
835 * Start, stop, suspend and resume
836 */
837 int (*port_suspend)(struct ata_port *ap, pm_message_t mesg);
838 int (*port_resume)(struct ata_port *ap);
839 int (*port_start)(struct ata_port *ap);
840 void (*port_stop)(struct ata_port *ap);
841 void (*host_stop)(struct ata_host *host);
842
843 #ifdef CONFIG_ATA_SFF
844 /*
845 * SFF / taskfile oriented ops
846 */
847 void (*sff_dev_select)(struct ata_port *ap, unsigned int device);
848 u8 (*sff_check_status)(struct ata_port *ap);
849 u8 (*sff_check_altstatus)(struct ata_port *ap);
850 void (*sff_tf_load)(struct ata_port *ap, const struct ata_taskfile *tf);
851 void (*sff_tf_read)(struct ata_port *ap, struct ata_taskfile *tf);
852 void (*sff_exec_command)(struct ata_port *ap,
853 const struct ata_taskfile *tf);
854 unsigned int (*sff_data_xfer)(struct ata_device *dev,
855 unsigned char *buf, unsigned int buflen, int rw);
856 u8 (*sff_irq_on)(struct ata_port *);
857 void (*sff_irq_clear)(struct ata_port *);
858
859 void (*bmdma_setup)(struct ata_queued_cmd *qc);
860 void (*bmdma_start)(struct ata_queued_cmd *qc);
861 void (*bmdma_stop)(struct ata_queued_cmd *qc);
862 u8 (*bmdma_status)(struct ata_port *ap);
863
864 void (*drain_fifo)(struct ata_queued_cmd *qc);
865 #endif /* CONFIG_ATA_SFF */
866
867 ssize_t (*em_show)(struct ata_port *ap, char *buf);
868 ssize_t (*em_store)(struct ata_port *ap, const char *message,
869 size_t size);
870 ssize_t (*sw_activity_show)(struct ata_device *dev, char *buf);
871 ssize_t (*sw_activity_store)(struct ata_device *dev,
872 enum sw_activity val);
873 /*
874 * Obsolete
875 */
876 void (*phy_reset)(struct ata_port *ap);
877 void (*eng_timeout)(struct ata_port *ap);
878
879 /*
880 * ->inherits must be the last field and all the preceding
881 * fields must be pointers.
882 */
883 const struct ata_port_operations *inherits;
884 };
885
886 struct ata_port_info {
887 unsigned long flags;
888 unsigned long link_flags;
889 unsigned long pio_mask;
890 unsigned long mwdma_mask;
891 unsigned long udma_mask;
892 struct ata_port_operations *port_ops;
893 void *private_data;
894 };
895
896 struct ata_timing {
897 unsigned short mode; /* ATA mode */
898 unsigned short setup; /* t1 */
899 unsigned short act8b; /* t2 for 8-bit I/O */
900 unsigned short rec8b; /* t2i for 8-bit I/O */
901 unsigned short cyc8b; /* t0 for 8-bit I/O */
902 unsigned short active; /* t2 or tD */
903 unsigned short recover; /* t2i or tK */
904 unsigned short dmack_hold; /* tj */
905 unsigned short cycle; /* t0 */
906 unsigned short udma; /* t2CYCTYP/2 */
907 };
908
909 /*
910 * Core layer - drivers/ata/libata-core.c
911 */
912 extern const unsigned long sata_deb_timing_normal[];
913 extern const unsigned long sata_deb_timing_hotplug[];
914 extern const unsigned long sata_deb_timing_long[];
915
916 extern struct ata_port_operations ata_dummy_port_ops;
917 extern const struct ata_port_info ata_dummy_port_info;
918
919 static inline const unsigned long *
920 sata_ehc_deb_timing(struct ata_eh_context *ehc)
921 {
922 if (ehc->i.flags & ATA_EHI_HOTPLUGGED)
923 return sata_deb_timing_hotplug;
924 else
925 return sata_deb_timing_normal;
926 }
927
928 static inline int ata_port_is_dummy(struct ata_port *ap)
929 {
930 return ap->ops == &ata_dummy_port_ops;
931 }
932
933 extern void ata_port_probe(struct ata_port *);
934 extern int sata_set_spd(struct ata_link *link);
935 extern int ata_std_prereset(struct ata_link *link, unsigned long deadline);
936 extern int ata_wait_after_reset(struct ata_link *link, unsigned long deadline,
937 int (*check_ready)(struct ata_link *link));
938 extern int sata_link_debounce(struct ata_link *link,
939 const unsigned long *params, unsigned long deadline);
940 extern int sata_link_resume(struct ata_link *link, const unsigned long *params,
941 unsigned long deadline);
942 extern int sata_link_hardreset(struct ata_link *link,
943 const unsigned long *timing, unsigned long deadline,
944 bool *online, int (*check_ready)(struct ata_link *));
945 extern int sata_std_hardreset(struct ata_link *link, unsigned int *class,
946 unsigned long deadline);
947 extern void ata_std_postreset(struct ata_link *link, unsigned int *classes);
948 extern void ata_port_disable(struct ata_port *);
949
950 extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports);
951 extern struct ata_host *ata_host_alloc_pinfo(struct device *dev,
952 const struct ata_port_info * const * ppi, int n_ports);
953 extern int ata_slave_link_init(struct ata_port *ap);
954 extern int ata_host_start(struct ata_host *host);
955 extern int ata_host_register(struct ata_host *host,
956 struct scsi_host_template *sht);
957 extern int ata_host_activate(struct ata_host *host, int irq,
958 irq_handler_t irq_handler, unsigned long irq_flags,
959 struct scsi_host_template *sht);
960 extern void ata_host_detach(struct ata_host *host);
961 extern void ata_host_init(struct ata_host *, struct device *,
962 unsigned long, struct ata_port_operations *);
963 extern int ata_scsi_detect(struct scsi_host_template *sht);
964 extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
965 extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *));
966 extern int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *dev,
967 int cmd, void __user *arg);
968 extern void ata_sas_port_destroy(struct ata_port *);
969 extern struct ata_port *ata_sas_port_alloc(struct ata_host *,
970 struct ata_port_info *, struct Scsi_Host *);
971 extern int ata_sas_port_init(struct ata_port *);
972 extern int ata_sas_port_start(struct ata_port *ap);
973 extern void ata_sas_port_stop(struct ata_port *ap);
974 extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *);
975 extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
976 struct ata_port *ap);
977 extern int sata_scr_valid(struct ata_link *link);
978 extern int sata_scr_read(struct ata_link *link, int reg, u32 *val);
979 extern int sata_scr_write(struct ata_link *link, int reg, u32 val);
980 extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val);
981 extern bool ata_link_online(struct ata_link *link);
982 extern bool ata_link_offline(struct ata_link *link);
983 #ifdef CONFIG_PM
984 extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg);
985 extern void ata_host_resume(struct ata_host *host);
986 #endif
987 extern int ata_ratelimit(void);
988 extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
989 unsigned long interval, unsigned long timeout);
990 extern int atapi_cmd_type(u8 opcode);
991 extern void ata_tf_to_fis(const struct ata_taskfile *tf,
992 u8 pmp, int is_cmd, u8 *fis);
993 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
994 extern unsigned long ata_pack_xfermask(unsigned long pio_mask,
995 unsigned long mwdma_mask, unsigned long udma_mask);
996 extern void ata_unpack_xfermask(unsigned long xfer_mask,
997 unsigned long *pio_mask, unsigned long *mwdma_mask,
998 unsigned long *udma_mask);
999 extern u8 ata_xfer_mask2mode(unsigned long xfer_mask);
1000 extern unsigned long ata_xfer_mode2mask(u8 xfer_mode);
1001 extern int ata_xfer_mode2shift(unsigned long xfer_mode);
1002 extern const char *ata_mode_string(unsigned long xfer_mask);
1003 extern unsigned long ata_id_xfermask(const u16 *id);
1004 extern int ata_port_start(struct ata_port *ap);
1005 extern int ata_std_qc_defer(struct ata_queued_cmd *qc);
1006 extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
1007 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
1008 unsigned int n_elem);
1009 extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
1010 extern void ata_dev_disable(struct ata_device *adev);
1011 extern void ata_id_string(const u16 *id, unsigned char *s,
1012 unsigned int ofs, unsigned int len);
1013 extern void ata_id_c_string(const u16 *id, unsigned char *s,
1014 unsigned int ofs, unsigned int len);
1015 extern unsigned int ata_do_dev_read_id(struct ata_device *dev,
1016 struct ata_taskfile *tf, u16 *id);
1017 extern void ata_qc_complete(struct ata_queued_cmd *qc);
1018 extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active);
1019 extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
1020 void (*done)(struct scsi_cmnd *));
1021 extern int ata_std_bios_param(struct scsi_device *sdev,
1022 struct block_device *bdev,
1023 sector_t capacity, int geom[]);
1024 extern int ata_scsi_slave_config(struct scsi_device *sdev);
1025 extern void ata_scsi_slave_destroy(struct scsi_device *sdev);
1026 extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
1027 int queue_depth, int reason);
1028 extern struct ata_device *ata_dev_pair(struct ata_device *adev);
1029 extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev);
1030
1031 extern int ata_cable_40wire(struct ata_port *ap);
1032 extern int ata_cable_80wire(struct ata_port *ap);
1033 extern int ata_cable_sata(struct ata_port *ap);
1034 extern int ata_cable_ignore(struct ata_port *ap);
1035 extern int ata_cable_unknown(struct ata_port *ap);
1036
1037 extern void ata_pio_queue_task(struct ata_port *ap, void *data,
1038 unsigned long delay);
1039
1040 /* Timing helpers */
1041 extern unsigned int ata_pio_need_iordy(const struct ata_device *);
1042 extern const struct ata_timing *ata_timing_find_mode(u8 xfer_mode);
1043 extern int ata_timing_compute(struct ata_device *, unsigned short,
1044 struct ata_timing *, int, int);
1045 extern void ata_timing_merge(const struct ata_timing *,
1046 const struct ata_timing *, struct ata_timing *,
1047 unsigned int);
1048 extern u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle);
1049
1050 /* PCI */
1051 #ifdef CONFIG_PCI
1052 struct pci_dev;
1053
1054 struct pci_bits {
1055 unsigned int reg; /* PCI config register to read */
1056 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
1057 unsigned long mask;
1058 unsigned long val;
1059 };
1060
1061 extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
1062 extern void ata_pci_remove_one(struct pci_dev *pdev);
1063
1064 #ifdef CONFIG_PM
1065 extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg);
1066 extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev);
1067 extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
1068 extern int ata_pci_device_resume(struct pci_dev *pdev);
1069 #endif /* CONFIG_PM */
1070 #endif /* CONFIG_PCI */
1071
1072 /*
1073 * ACPI - drivers/ata/libata-acpi.c
1074 */
1075 #ifdef CONFIG_ATA_ACPI
1076 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
1077 {
1078 if (ap->pflags & ATA_PFLAG_INIT_GTM_VALID)
1079 return &ap->__acpi_init_gtm;
1080 return NULL;
1081 }
1082 int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm);
1083 int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *stm);
1084 unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev,
1085 const struct ata_acpi_gtm *gtm);
1086 int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm);
1087 #else
1088 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
1089 {
1090 return NULL;
1091 }
1092
1093 static inline int ata_acpi_stm(const struct ata_port *ap,
1094 struct ata_acpi_gtm *stm)
1095 {
1096 return -ENOSYS;
1097 }
1098
1099 static inline int ata_acpi_gtm(const struct ata_port *ap,
1100 struct ata_acpi_gtm *stm)
1101 {
1102 return -ENOSYS;
1103 }
1104
1105 static inline unsigned int ata_acpi_gtm_xfermask(struct ata_device *dev,
1106 const struct ata_acpi_gtm *gtm)
1107 {
1108 return 0;
1109 }
1110
1111 static inline int ata_acpi_cbl_80wire(struct ata_port *ap,
1112 const struct ata_acpi_gtm *gtm)
1113 {
1114 return 0;
1115 }
1116 #endif
1117
1118 /*
1119 * EH - drivers/ata/libata-eh.c
1120 */
1121 extern void ata_port_schedule_eh(struct ata_port *ap);
1122 extern int ata_link_abort(struct ata_link *link);
1123 extern int ata_port_abort(struct ata_port *ap);
1124 extern int ata_port_freeze(struct ata_port *ap);
1125 extern int sata_async_notification(struct ata_port *ap);
1126
1127 extern void ata_eh_freeze_port(struct ata_port *ap);
1128 extern void ata_eh_thaw_port(struct ata_port *ap);
1129
1130 extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
1131 extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
1132 extern void ata_eh_analyze_ncq_error(struct ata_link *link);
1133
1134 extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
1135 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
1136 ata_postreset_fn_t postreset);
1137 extern void ata_std_error_handler(struct ata_port *ap);
1138
1139 /*
1140 * Base operations to inherit from and initializers for sht
1141 *
1142 * Operations
1143 *
1144 * base : Common to all libata drivers.
1145 * sata : SATA controllers w/ native interface.
1146 * pmp : SATA controllers w/ PMP support.
1147 * sff : SFF ATA controllers w/o BMDMA support.
1148 * bmdma : SFF ATA controllers w/ BMDMA support.
1149 *
1150 * sht initializers
1151 *
1152 * BASE : Common to all libata drivers. The user must set
1153 * sg_tablesize and dma_boundary.
1154 * PIO : SFF ATA controllers w/ only PIO support.
1155 * BMDMA : SFF ATA controllers w/ BMDMA support. sg_tablesize and
1156 * dma_boundary are set to BMDMA limits.
1157 * NCQ : SATA controllers supporting NCQ. The user must set
1158 * sg_tablesize, dma_boundary and can_queue.
1159 */
1160 extern const struct ata_port_operations ata_base_port_ops;
1161 extern const struct ata_port_operations sata_port_ops;
1162 extern struct device_attribute *ata_common_sdev_attrs[];
1163
1164 #define ATA_BASE_SHT(drv_name) \
1165 .module = THIS_MODULE, \
1166 .name = drv_name, \
1167 .ioctl = ata_scsi_ioctl, \
1168 .queuecommand = ata_scsi_queuecmd, \
1169 .can_queue = ATA_DEF_QUEUE, \
1170 .this_id = ATA_SHT_THIS_ID, \
1171 .cmd_per_lun = ATA_SHT_CMD_PER_LUN, \
1172 .emulated = ATA_SHT_EMULATED, \
1173 .use_clustering = ATA_SHT_USE_CLUSTERING, \
1174 .proc_name = drv_name, \
1175 .slave_configure = ata_scsi_slave_config, \
1176 .slave_destroy = ata_scsi_slave_destroy, \
1177 .bios_param = ata_std_bios_param, \
1178 .sdev_attrs = ata_common_sdev_attrs
1179
1180 #define ATA_NCQ_SHT(drv_name) \
1181 ATA_BASE_SHT(drv_name), \
1182 .change_queue_depth = ata_scsi_change_queue_depth
1183
1184 /*
1185 * PMP helpers
1186 */
1187 #ifdef CONFIG_SATA_PMP
1188 static inline bool sata_pmp_supported(struct ata_port *ap)
1189 {
1190 return ap->flags & ATA_FLAG_PMP;
1191 }
1192
1193 static inline bool sata_pmp_attached(struct ata_port *ap)
1194 {
1195 return ap->nr_pmp_links != 0;
1196 }
1197
1198 static inline int ata_is_host_link(const struct ata_link *link)
1199 {
1200 return link == &link->ap->link || link == link->ap->slave_link;
1201 }
1202 #else /* CONFIG_SATA_PMP */
1203 static inline bool sata_pmp_supported(struct ata_port *ap)
1204 {
1205 return false;
1206 }
1207
1208 static inline bool sata_pmp_attached(struct ata_port *ap)
1209 {
1210 return false;
1211 }
1212
1213 static inline int ata_is_host_link(const struct ata_link *link)
1214 {
1215 return 1;
1216 }
1217 #endif /* CONFIG_SATA_PMP */
1218
1219 static inline int sata_srst_pmp(struct ata_link *link)
1220 {
1221 if (sata_pmp_supported(link->ap) && ata_is_host_link(link))
1222 return SATA_PMP_CTRL_PORT;
1223 return link->pmp;
1224 }
1225
1226 /*
1227 * printk helpers
1228 */
1229 #define ata_port_printk(ap, lv, fmt, args...) \
1230 printk("%sata%u: "fmt, lv, (ap)->print_id , ##args)
1231
1232 #define ata_link_printk(link, lv, fmt, args...) do { \
1233 if (sata_pmp_attached((link)->ap) || (link)->ap->slave_link) \
1234 printk("%sata%u.%02u: "fmt, lv, (link)->ap->print_id, \
1235 (link)->pmp , ##args); \
1236 else \
1237 printk("%sata%u: "fmt, lv, (link)->ap->print_id , ##args); \
1238 } while(0)
1239
1240 #define ata_dev_printk(dev, lv, fmt, args...) \
1241 printk("%sata%u.%02u: "fmt, lv, (dev)->link->ap->print_id, \
1242 (dev)->link->pmp + (dev)->devno , ##args)
1243
1244 /*
1245 * ata_eh_info helpers
1246 */
1247 extern void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...)
1248 __attribute__ ((format (printf, 2, 3)));
1249 extern void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...)
1250 __attribute__ ((format (printf, 2, 3)));
1251 extern void ata_ehi_clear_desc(struct ata_eh_info *ehi);
1252
1253 static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
1254 {
1255 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
1256 ehi->flags |= ATA_EHI_HOTPLUGGED;
1257 ehi->action |= ATA_EH_RESET | ATA_EH_ENABLE_LINK;
1258 ehi->err_mask |= AC_ERR_ATA_BUS;
1259 }
1260
1261 /*
1262 * port description helpers
1263 */
1264 extern void ata_port_desc(struct ata_port *ap, const char *fmt, ...)
1265 __attribute__ ((format (printf, 2, 3)));
1266 #ifdef CONFIG_PCI
1267 extern void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset,
1268 const char *name);
1269 #endif
1270
1271 static inline unsigned int ata_tag_valid(unsigned int tag)
1272 {
1273 return (tag < ATA_MAX_QUEUE) ? 1 : 0;
1274 }
1275
1276 static inline unsigned int ata_tag_internal(unsigned int tag)
1277 {
1278 return tag == ATA_TAG_INTERNAL;
1279 }
1280
1281 /*
1282 * device helpers
1283 */
1284 static inline unsigned int ata_class_enabled(unsigned int class)
1285 {
1286 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI ||
1287 class == ATA_DEV_PMP || class == ATA_DEV_SEMB;
1288 }
1289
1290 static inline unsigned int ata_class_disabled(unsigned int class)
1291 {
1292 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP ||
1293 class == ATA_DEV_PMP_UNSUP || class == ATA_DEV_SEMB_UNSUP;
1294 }
1295
1296 static inline unsigned int ata_class_absent(unsigned int class)
1297 {
1298 return !ata_class_enabled(class) && !ata_class_disabled(class);
1299 }
1300
1301 static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
1302 {
1303 return ata_class_enabled(dev->class);
1304 }
1305
1306 static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
1307 {
1308 return ata_class_disabled(dev->class);
1309 }
1310
1311 static inline unsigned int ata_dev_absent(const struct ata_device *dev)
1312 {
1313 return ata_class_absent(dev->class);
1314 }
1315
1316 /*
1317 * link helpers
1318 */
1319 static inline int ata_link_max_devices(const struct ata_link *link)
1320 {
1321 if (ata_is_host_link(link) && link->ap->flags & ATA_FLAG_SLAVE_POSS)
1322 return 2;
1323 return 1;
1324 }
1325
1326 static inline int ata_link_active(struct ata_link *link)
1327 {
1328 return ata_tag_valid(link->active_tag) || link->sactive;
1329 }
1330
1331 /*
1332 * Iterators
1333 *
1334 * ATA_LITER_* constants are used to select link iteration mode and
1335 * ATA_DITER_* device iteration mode.
1336 *
1337 * For a custom iteration directly using ata_{link|dev}_next(), if
1338 * @link or @dev, respectively, is NULL, the first element is
1339 * returned. @dev and @link can be any valid device or link and the
1340 * next element according to the iteration mode will be returned.
1341 * After the last element, NULL is returned.
1342 */
1343 enum ata_link_iter_mode {
1344 ATA_LITER_EDGE, /* if present, PMP links only; otherwise,
1345 * host link. no slave link */
1346 ATA_LITER_HOST_FIRST, /* host link followed by PMP or slave links */
1347 ATA_LITER_PMP_FIRST, /* PMP links followed by host link,
1348 * slave link still comes after host link */
1349 };
1350
1351 enum ata_dev_iter_mode {
1352 ATA_DITER_ENABLED,
1353 ATA_DITER_ENABLED_REVERSE,
1354 ATA_DITER_ALL,
1355 ATA_DITER_ALL_REVERSE,
1356 };
1357
1358 extern struct ata_link *ata_link_next(struct ata_link *link,
1359 struct ata_port *ap,
1360 enum ata_link_iter_mode mode);
1361
1362 extern struct ata_device *ata_dev_next(struct ata_device *dev,
1363 struct ata_link *link,
1364 enum ata_dev_iter_mode mode);
1365
1366 /*
1367 * Shortcut notation for iterations
1368 *
1369 * ata_for_each_link() iterates over each link of @ap according to
1370 * @mode. @link points to the current link in the loop. @link is
1371 * NULL after loop termination. ata_for_each_dev() works the same way
1372 * except that it iterates over each device of @link.
1373 *
1374 * Note that the mode prefixes ATA_{L|D}ITER_ shouldn't need to be
1375 * specified when using the following shorthand notations. Only the
1376 * mode itself (EDGE, HOST_FIRST, ENABLED, etc...) should be
1377 * specified. This not only increases brevity but also makes it
1378 * impossible to use ATA_LITER_* for device iteration or vice-versa.
1379 */
1380 #define ata_for_each_link(link, ap, mode) \
1381 for ((link) = ata_link_next(NULL, (ap), ATA_LITER_##mode); (link); \
1382 (link) = ata_link_next((link), (ap), ATA_LITER_##mode))
1383
1384 #define ata_for_each_dev(dev, link, mode) \
1385 for ((dev) = ata_dev_next(NULL, (link), ATA_DITER_##mode); (dev); \
1386 (dev) = ata_dev_next((dev), (link), ATA_DITER_##mode))
1387
1388 /**
1389 * ata_ncq_enabled - Test whether NCQ is enabled
1390 * @dev: ATA device to test for
1391 *
1392 * LOCKING:
1393 * spin_lock_irqsave(host lock)
1394 *
1395 * RETURNS:
1396 * 1 if NCQ is enabled for @dev, 0 otherwise.
1397 */
1398 static inline int ata_ncq_enabled(struct ata_device *dev)
1399 {
1400 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF |
1401 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ;
1402 }
1403
1404 static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
1405 {
1406 qc->tf.ctl |= ATA_NIEN;
1407 }
1408
1409 static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap,
1410 unsigned int tag)
1411 {
1412 if (likely(ata_tag_valid(tag)))
1413 return &ap->qcmd[tag];
1414 return NULL;
1415 }
1416
1417 static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap,
1418 unsigned int tag)
1419 {
1420 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
1421
1422 if (unlikely(!qc) || !ap->ops->error_handler)
1423 return qc;
1424
1425 if ((qc->flags & (ATA_QCFLAG_ACTIVE |
1426 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE)
1427 return qc;
1428
1429 return NULL;
1430 }
1431
1432 static inline unsigned int ata_qc_raw_nbytes(struct ata_queued_cmd *qc)
1433 {
1434 return qc->nbytes - min(qc->extrabytes, qc->nbytes);
1435 }
1436
1437 static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
1438 {
1439 memset(tf, 0, sizeof(*tf));
1440
1441 tf->ctl = dev->link->ap->ctl;
1442 if (dev->devno == 0)
1443 tf->device = ATA_DEVICE_OBS;
1444 else
1445 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
1446 }
1447
1448 static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
1449 {
1450 qc->dma_dir = DMA_NONE;
1451 qc->sg = NULL;
1452 qc->flags = 0;
1453 qc->cursg = NULL;
1454 qc->cursg_ofs = 0;
1455 qc->nbytes = qc->extrabytes = qc->curbytes = 0;
1456 qc->n_elem = 0;
1457 qc->err_mask = 0;
1458 qc->sect_size = ATA_SECT_SIZE;
1459
1460 ata_tf_init(qc->dev, &qc->tf);
1461
1462 /* init result_tf such that it indicates normal completion */
1463 qc->result_tf.command = ATA_DRDY;
1464 qc->result_tf.feature = 0;
1465 }
1466
1467 static inline int ata_try_flush_cache(const struct ata_device *dev)
1468 {
1469 return ata_id_wcache_enabled(dev->id) ||
1470 ata_id_has_flush(dev->id) ||
1471 ata_id_has_flush_ext(dev->id);
1472 }
1473
1474 static inline unsigned int ac_err_mask(u8 status)
1475 {
1476 if (status & (ATA_BUSY | ATA_DRQ))
1477 return AC_ERR_HSM;
1478 if (status & (ATA_ERR | ATA_DF))
1479 return AC_ERR_DEV;
1480 return 0;
1481 }
1482
1483 static inline unsigned int __ac_err_mask(u8 status)
1484 {
1485 unsigned int mask = ac_err_mask(status);
1486 if (mask == 0)
1487 return AC_ERR_OTHER;
1488 return mask;
1489 }
1490
1491 static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
1492 {
1493 return *(struct ata_port **)&host->hostdata[0];
1494 }
1495
1496 static inline int ata_check_ready(u8 status)
1497 {
1498 if (!(status & ATA_BUSY))
1499 return 1;
1500
1501 /* 0xff indicates either no device or device not ready */
1502 if (status == 0xff)
1503 return -ENODEV;
1504
1505 return 0;
1506 }
1507
1508 static inline unsigned long ata_deadline(unsigned long from_jiffies,
1509 unsigned long timeout_msecs)
1510 {
1511 return from_jiffies + msecs_to_jiffies(timeout_msecs);
1512 }
1513
1514 /* Don't open code these in drivers as there are traps. Firstly the range may
1515 change in future hardware and specs, secondly 0xFF means 'no DMA' but is
1516 > UDMA_0. Dyma ddreigiau */
1517
1518 static inline int ata_using_mwdma(struct ata_device *adev)
1519 {
1520 if (adev->dma_mode >= XFER_MW_DMA_0 && adev->dma_mode <= XFER_MW_DMA_4)
1521 return 1;
1522 return 0;
1523 }
1524
1525 static inline int ata_using_udma(struct ata_device *adev)
1526 {
1527 if (adev->dma_mode >= XFER_UDMA_0 && adev->dma_mode <= XFER_UDMA_7)
1528 return 1;
1529 return 0;
1530 }
1531
1532 static inline int ata_dma_enabled(struct ata_device *adev)
1533 {
1534 return (adev->dma_mode == 0xFF ? 0 : 1);
1535 }
1536
1537 /**************************************************************************
1538 * PMP - drivers/ata/libata-pmp.c
1539 */
1540 #ifdef CONFIG_SATA_PMP
1541
1542 extern const struct ata_port_operations sata_pmp_port_ops;
1543
1544 extern int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc);
1545 extern void sata_pmp_error_handler(struct ata_port *ap);
1546
1547 #else /* CONFIG_SATA_PMP */
1548
1549 #define sata_pmp_port_ops sata_port_ops
1550 #define sata_pmp_qc_defer_cmd_switch ata_std_qc_defer
1551 #define sata_pmp_error_handler ata_std_error_handler
1552
1553 #endif /* CONFIG_SATA_PMP */
1554
1555
1556 /**************************************************************************
1557 * SFF - drivers/ata/libata-sff.c
1558 */
1559 #ifdef CONFIG_ATA_SFF
1560
1561 extern const struct ata_port_operations ata_sff_port_ops;
1562 extern const struct ata_port_operations ata_bmdma_port_ops;
1563 extern const struct ata_port_operations ata_bmdma32_port_ops;
1564
1565 /* PIO only, sg_tablesize and dma_boundary limits can be removed */
1566 #define ATA_PIO_SHT(drv_name) \
1567 ATA_BASE_SHT(drv_name), \
1568 .sg_tablesize = LIBATA_MAX_PRD, \
1569 .dma_boundary = ATA_DMA_BOUNDARY
1570
1571 #define ATA_BMDMA_SHT(drv_name) \
1572 ATA_BASE_SHT(drv_name), \
1573 .sg_tablesize = LIBATA_MAX_PRD, \
1574 .dma_boundary = ATA_DMA_BOUNDARY
1575
1576 extern void ata_sff_qc_prep(struct ata_queued_cmd *qc);
1577 extern void ata_sff_dumb_qc_prep(struct ata_queued_cmd *qc);
1578 extern void ata_sff_dev_select(struct ata_port *ap, unsigned int device);
1579 extern u8 ata_sff_check_status(struct ata_port *ap);
1580 extern void ata_sff_pause(struct ata_port *ap);
1581 extern void ata_sff_dma_pause(struct ata_port *ap);
1582 extern int ata_sff_busy_sleep(struct ata_port *ap,
1583 unsigned long timeout_pat, unsigned long timeout);
1584 extern int ata_sff_wait_ready(struct ata_link *link, unsigned long deadline);
1585 extern void ata_sff_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
1586 extern void ata_sff_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
1587 extern void ata_sff_exec_command(struct ata_port *ap,
1588 const struct ata_taskfile *tf);
1589 extern unsigned int ata_sff_data_xfer(struct ata_device *dev,
1590 unsigned char *buf, unsigned int buflen, int rw);
1591 extern unsigned int ata_sff_data_xfer32(struct ata_device *dev,
1592 unsigned char *buf, unsigned int buflen, int rw);
1593 extern unsigned int ata_sff_data_xfer_noirq(struct ata_device *dev,
1594 unsigned char *buf, unsigned int buflen, int rw);
1595 extern u8 ata_sff_irq_on(struct ata_port *ap);
1596 extern void ata_sff_irq_clear(struct ata_port *ap);
1597 extern int ata_sff_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
1598 u8 status, int in_wq);
1599 extern unsigned int ata_sff_qc_issue(struct ata_queued_cmd *qc);
1600 extern bool ata_sff_qc_fill_rtf(struct ata_queued_cmd *qc);
1601 extern unsigned int ata_sff_host_intr(struct ata_port *ap,
1602 struct ata_queued_cmd *qc);
1603 extern irqreturn_t ata_sff_interrupt(int irq, void *dev_instance);
1604 extern void ata_sff_lost_interrupt(struct ata_port *ap);
1605 extern void ata_sff_freeze(struct ata_port *ap);
1606 extern void ata_sff_thaw(struct ata_port *ap);
1607 extern int ata_sff_prereset(struct ata_link *link, unsigned long deadline);
1608 extern unsigned int ata_sff_dev_classify(struct ata_device *dev, int present,
1609 u8 *r_err);
1610 extern int ata_sff_wait_after_reset(struct ata_link *link, unsigned int devmask,
1611 unsigned long deadline);
1612 extern int ata_sff_softreset(struct ata_link *link, unsigned int *classes,
1613 unsigned long deadline);
1614 extern int sata_sff_hardreset(struct ata_link *link, unsigned int *class,
1615 unsigned long deadline);
1616 extern void ata_sff_postreset(struct ata_link *link, unsigned int *classes);
1617 extern void ata_sff_drain_fifo(struct ata_queued_cmd *qc);
1618 extern void ata_sff_error_handler(struct ata_port *ap);
1619 extern void ata_sff_post_internal_cmd(struct ata_queued_cmd *qc);
1620 extern int ata_sff_port_start(struct ata_port *ap);
1621 extern int ata_sff_port_start32(struct ata_port *ap);
1622 extern void ata_sff_std_ports(struct ata_ioports *ioaddr);
1623 extern unsigned long ata_bmdma_mode_filter(struct ata_device *dev,
1624 unsigned long xfer_mask);
1625 extern void ata_bmdma_setup(struct ata_queued_cmd *qc);
1626 extern void ata_bmdma_start(struct ata_queued_cmd *qc);
1627 extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
1628 extern u8 ata_bmdma_status(struct ata_port *ap);
1629 extern void ata_bus_reset(struct ata_port *ap);
1630
1631 #ifdef CONFIG_PCI
1632 extern int ata_pci_bmdma_clear_simplex(struct pci_dev *pdev);
1633 extern int ata_pci_bmdma_init(struct ata_host *host);
1634 extern int ata_pci_sff_init_host(struct ata_host *host);
1635 extern int ata_pci_sff_prepare_host(struct pci_dev *pdev,
1636 const struct ata_port_info * const * ppi,
1637 struct ata_host **r_host);
1638 extern int ata_pci_sff_activate_host(struct ata_host *host,
1639 irq_handler_t irq_handler,
1640 struct scsi_host_template *sht);
1641 extern int ata_pci_sff_init_one(struct pci_dev *pdev,
1642 const struct ata_port_info * const * ppi,
1643 struct scsi_host_template *sht, void *host_priv);
1644 #endif /* CONFIG_PCI */
1645
1646 /**
1647 * ata_sff_busy_wait - Wait for a port status register
1648 * @ap: Port to wait for.
1649 * @bits: bits that must be clear
1650 * @max: number of 10uS waits to perform
1651 *
1652 * Waits up to max*10 microseconds for the selected bits in the port's
1653 * status register to be cleared.
1654 * Returns final value of status register.
1655 *
1656 * LOCKING:
1657 * Inherited from caller.
1658 */
1659 static inline u8 ata_sff_busy_wait(struct ata_port *ap, unsigned int bits,
1660 unsigned int max)
1661 {
1662 u8 status;
1663
1664 do {
1665 udelay(10);
1666 status = ap->ops->sff_check_status(ap);
1667 max--;
1668 } while (status != 0xff && (status & bits) && (max > 0));
1669
1670 return status;
1671 }
1672
1673 /**
1674 * ata_wait_idle - Wait for a port to be idle.
1675 * @ap: Port to wait for.
1676 *
1677 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
1678 * Returns final value of status register.
1679 *
1680 * LOCKING:
1681 * Inherited from caller.
1682 */
1683 static inline u8 ata_wait_idle(struct ata_port *ap)
1684 {
1685 u8 status = ata_sff_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
1686
1687 #ifdef ATA_DEBUG
1688 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ)))
1689 ata_port_printk(ap, KERN_DEBUG, "abnormal Status 0x%X\n",
1690 status);
1691 #endif
1692
1693 return status;
1694 }
1695 #endif /* CONFIG_ATA_SFF */
1696
1697 #endif /* __LINUX_LIBATA_H__ */