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ocfs2: add cleancache support
[linux-2.6/next.git] / include / linux / libata.h
blob7f675aa81d877795b12e48c78a13f6ae144af606
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 #include <linux/sched.h>
41
42 /*
43 * Define if arch has non-standard setup. This is a _PCI_ standard
44 * not a legacy or ISA standard.
45 */
46 #ifdef CONFIG_ATA_NONSTANDARD
47 #include <asm/libata-portmap.h>
48 #else
49 #include <asm-generic/libata-portmap.h>
50 #endif
51
52 /*
53 * compile-time options: to be removed as soon as all the drivers are
54 * converted to the new debugging mechanism
55 */
56 #undef ATA_DEBUG /* debugging output */
57 #undef ATA_VERBOSE_DEBUG /* yet more debugging output */
58 #undef ATA_IRQ_TRAP /* define to ack screaming irqs */
59 #undef ATA_NDEBUG /* define to disable quick runtime checks */
60
61
62 /* note: prints function name for you */
63 #ifdef ATA_DEBUG
64 #define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args)
65 #ifdef ATA_VERBOSE_DEBUG
66 #define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args)
67 #else
68 #define VPRINTK(fmt, args...)
69 #endif /* ATA_VERBOSE_DEBUG */
70 #else
71 #define DPRINTK(fmt, args...)
72 #define VPRINTK(fmt, args...)
73 #endif /* ATA_DEBUG */
74
75 #define BPRINTK(fmt, args...) if (ap->flags & ATA_FLAG_DEBUGMSG) printk(KERN_ERR "%s: " fmt, __func__, ## args)
76
77 /* NEW: debug levels */
78 #define HAVE_LIBATA_MSG 1
79
80 enum {
81 ATA_MSG_DRV = 0x0001,
82 ATA_MSG_INFO = 0x0002,
83 ATA_MSG_PROBE = 0x0004,
84 ATA_MSG_WARN = 0x0008,
85 ATA_MSG_MALLOC = 0x0010,
86 ATA_MSG_CTL = 0x0020,
87 ATA_MSG_INTR = 0x0040,
88 ATA_MSG_ERR = 0x0080,
89 };
90
91 #define ata_msg_drv(p) ((p)->msg_enable & ATA_MSG_DRV)
92 #define ata_msg_info(p) ((p)->msg_enable & ATA_MSG_INFO)
93 #define ata_msg_probe(p) ((p)->msg_enable & ATA_MSG_PROBE)
94 #define ata_msg_warn(p) ((p)->msg_enable & ATA_MSG_WARN)
95 #define ata_msg_malloc(p) ((p)->msg_enable & ATA_MSG_MALLOC)
96 #define ata_msg_ctl(p) ((p)->msg_enable & ATA_MSG_CTL)
97 #define ata_msg_intr(p) ((p)->msg_enable & ATA_MSG_INTR)
98 #define ata_msg_err(p) ((p)->msg_enable & ATA_MSG_ERR)
99
100 static inline u32 ata_msg_init(int dval, int default_msg_enable_bits)
101 {
102 if (dval < 0 || dval >= (sizeof(u32) * 8))
103 return default_msg_enable_bits; /* should be 0x1 - only driver info msgs */
104 if (!dval)
105 return 0;
106 return (1 << dval) - 1;
107 }
108
109 /* defines only for the constants which don't work well as enums */
110 #define ATA_TAG_POISON 0xfafbfcfdU
111
112 enum {
113 /* various global constants */
114 LIBATA_MAX_PRD = ATA_MAX_PRD / 2,
115 LIBATA_DUMB_MAX_PRD = ATA_MAX_PRD / 4, /* Worst case */
116 ATA_DEF_QUEUE = 1,
117 /* tag ATA_MAX_QUEUE - 1 is reserved for internal commands */
118 ATA_MAX_QUEUE = 32,
119 ATA_TAG_INTERNAL = ATA_MAX_QUEUE - 1,
120 ATA_SHORT_PAUSE = 16,
121
122 ATAPI_MAX_DRAIN = 16 << 10,
123
124 ATA_ALL_DEVICES = (1 << ATA_MAX_DEVICES) - 1,
125
126 ATA_SHT_EMULATED = 1,
127 ATA_SHT_CMD_PER_LUN = 1,
128 ATA_SHT_THIS_ID = -1,
129 ATA_SHT_USE_CLUSTERING = 1,
130
131 /* struct ata_device stuff */
132 ATA_DFLAG_LBA = (1 << 0), /* device supports LBA */
133 ATA_DFLAG_LBA48 = (1 << 1), /* device supports LBA48 */
134 ATA_DFLAG_CDB_INTR = (1 << 2), /* device asserts INTRQ when ready for CDB */
135 ATA_DFLAG_NCQ = (1 << 3), /* device supports NCQ */
136 ATA_DFLAG_FLUSH_EXT = (1 << 4), /* do FLUSH_EXT instead of FLUSH */
137 ATA_DFLAG_ACPI_PENDING = (1 << 5), /* ACPI resume action pending */
138 ATA_DFLAG_ACPI_FAILED = (1 << 6), /* ACPI on devcfg has failed */
139 ATA_DFLAG_AN = (1 << 7), /* AN configured */
140 ATA_DFLAG_HIPM = (1 << 8), /* device supports HIPM */
141 ATA_DFLAG_DIPM = (1 << 9), /* device supports DIPM */
142 ATA_DFLAG_DMADIR = (1 << 10), /* device requires DMADIR */
143 ATA_DFLAG_CFG_MASK = (1 << 12) - 1,
144
145 ATA_DFLAG_PIO = (1 << 12), /* device limited to PIO mode */
146 ATA_DFLAG_NCQ_OFF = (1 << 13), /* device limited to non-NCQ mode */
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_UNLOCK_HPA = (1 << 18), /* unlock HPA */
151 ATA_DFLAG_INIT_MASK = (1 << 24) - 1,
152
153 ATA_DFLAG_DETACH = (1 << 24),
154 ATA_DFLAG_DETACHED = (1 << 25),
155
156 ATA_DEV_UNKNOWN = 0, /* unknown device */
157 ATA_DEV_ATA = 1, /* ATA device */
158 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */
159 ATA_DEV_ATAPI = 3, /* ATAPI device */
160 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */
161 ATA_DEV_PMP = 5, /* SATA port multiplier */
162 ATA_DEV_PMP_UNSUP = 6, /* SATA port multiplier (unsupported) */
163 ATA_DEV_SEMB = 7, /* SEMB */
164 ATA_DEV_SEMB_UNSUP = 8, /* SEMB (unsupported) */
165 ATA_DEV_NONE = 9, /* no device */
166
167 /* struct ata_link flags */
168 ATA_LFLAG_NO_HRST = (1 << 1), /* avoid hardreset */
169 ATA_LFLAG_NO_SRST = (1 << 2), /* avoid softreset */
170 ATA_LFLAG_ASSUME_ATA = (1 << 3), /* assume ATA class */
171 ATA_LFLAG_ASSUME_SEMB = (1 << 4), /* assume SEMB class */
172 ATA_LFLAG_ASSUME_CLASS = ATA_LFLAG_ASSUME_ATA | ATA_LFLAG_ASSUME_SEMB,
173 ATA_LFLAG_NO_RETRY = (1 << 5), /* don't retry this link */
174 ATA_LFLAG_DISABLED = (1 << 6), /* link is disabled */
175 ATA_LFLAG_SW_ACTIVITY = (1 << 7), /* keep activity stats */
176 ATA_LFLAG_NO_LPM = (1 << 8), /* disable LPM on this link */
177
178 /* struct ata_port flags */
179 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */
180 /* (doesn't imply presence) */
181 ATA_FLAG_SATA = (1 << 1),
182 ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */
183 ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */
184 ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */
185 ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD
186 * doesn't handle PIO interrupts */
187 ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */
188 ATA_FLAG_NO_POWEROFF_SPINDOWN = (1 << 11), /* don't spindown before poweroff */
189 ATA_FLAG_NO_HIBERNATE_SPINDOWN = (1 << 12), /* don't spindown before hibernation */
190 ATA_FLAG_DEBUGMSG = (1 << 13),
191 ATA_FLAG_FPDMA_AA = (1 << 14), /* driver supports Auto-Activate */
192 ATA_FLAG_IGN_SIMPLEX = (1 << 15), /* ignore SIMPLEX */
193 ATA_FLAG_NO_IORDY = (1 << 16), /* controller lacks iordy */
194 ATA_FLAG_ACPI_SATA = (1 << 17), /* need native SATA ACPI layout */
195 ATA_FLAG_AN = (1 << 18), /* controller supports AN */
196 ATA_FLAG_PMP = (1 << 19), /* controller supports PMP */
197 ATA_FLAG_EM = (1 << 21), /* driver supports enclosure
198 * management */
199 ATA_FLAG_SW_ACTIVITY = (1 << 22), /* driver supports sw activity
200 * led */
201
202 /* bits 24:31 of ap->flags are reserved for LLD specific flags */
203
204
205 /* struct ata_port pflags */
206 ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */
207 ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */
208 ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */
209 ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */
210 ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */
211 ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */
212 ATA_PFLAG_INITIALIZING = (1 << 7), /* being initialized, don't touch */
213 ATA_PFLAG_RESETTING = (1 << 8), /* reset in progress */
214 ATA_PFLAG_UNLOADING = (1 << 9), /* driver is being unloaded */
215 ATA_PFLAG_UNLOADED = (1 << 10), /* driver is unloaded */
216
217 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */
218 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */
219 ATA_PFLAG_INIT_GTM_VALID = (1 << 19), /* initial gtm data valid */
220
221 ATA_PFLAG_PIO32 = (1 << 20), /* 32bit PIO */
222 ATA_PFLAG_PIO32CHANGE = (1 << 21), /* 32bit PIO can be turned on/off */
223
224 /* struct ata_queued_cmd flags */
225 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */
226 ATA_QCFLAG_DMAMAP = (1 << 1), /* SG table is DMA mapped */
227 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */
228 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */
229 ATA_QCFLAG_CLEAR_EXCL = (1 << 5), /* clear excl_link on completion */
230 ATA_QCFLAG_QUIET = (1 << 6), /* don't report device error */
231 ATA_QCFLAG_RETRY = (1 << 7), /* retry after failure */
232
233 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */
234 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */
235 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */
236
237 /* host set flags */
238 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */
239 ATA_HOST_STARTED = (1 << 1), /* Host started */
240 ATA_HOST_PARALLEL_SCAN = (1 << 2), /* Ports on this host can be scanned in parallel */
241
242 /* bits 24:31 of host->flags are reserved for LLD specific flags */
243
244 /* various lengths of time */
245 ATA_TMOUT_BOOT = 30000, /* heuristic */
246 ATA_TMOUT_BOOT_QUICK = 7000, /* heuristic */
247 ATA_TMOUT_INTERNAL_QUICK = 5000,
248 ATA_TMOUT_MAX_PARK = 30000,
249
250 /*
251 * GoVault needs 2s and iVDR disk HHD424020F7SV00 800ms. 2s
252 * is too much without parallel probing. Use 2s if parallel
253 * probing is available, 800ms otherwise.
254 */
255 ATA_TMOUT_FF_WAIT_LONG = 2000,
256 ATA_TMOUT_FF_WAIT = 800,
257
258 /* Spec mandates to wait for ">= 2ms" before checking status
259 * after reset. We wait 150ms, because that was the magic
260 * delay used for ATAPI devices in Hale Landis's ATADRVR, for
261 * the period of time between when the ATA command register is
262 * written, and then status is checked. Because waiting for
263 * "a while" before checking status is fine, post SRST, we
264 * perform this magic delay here as well.
265 *
266 * Old drivers/ide uses the 2mS rule and then waits for ready.
267 */
268 ATA_WAIT_AFTER_RESET = 150,
269
270 /* If PMP is supported, we have to do follow-up SRST. As some
271 * PMPs don't send D2H Reg FIS after hardreset, LLDs are
272 * advised to wait only for the following duration before
273 * doing SRST.
274 */
275 ATA_TMOUT_PMP_SRST_WAIT = 5000,
276
277 /* ATA bus states */
278 BUS_UNKNOWN = 0,
279 BUS_DMA = 1,
280 BUS_IDLE = 2,
281 BUS_NOINTR = 3,
282 BUS_NODATA = 4,
283 BUS_TIMER = 5,
284 BUS_PIO = 6,
285 BUS_EDD = 7,
286 BUS_IDENTIFY = 8,
287 BUS_PACKET = 9,
288
289 /* SATA port states */
290 PORT_UNKNOWN = 0,
291 PORT_ENABLED = 1,
292 PORT_DISABLED = 2,
293
294 /* encoding various smaller bitmaps into a single
295 * unsigned long bitmap
296 */
297 ATA_NR_PIO_MODES = 7,
298 ATA_NR_MWDMA_MODES = 5,
299 ATA_NR_UDMA_MODES = 8,
300
301 ATA_SHIFT_PIO = 0,
302 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_NR_PIO_MODES,
303 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_NR_MWDMA_MODES,
304
305 /* size of buffer to pad xfers ending on unaligned boundaries */
306 ATA_DMA_PAD_SZ = 4,
307
308 /* ering size */
309 ATA_ERING_SIZE = 32,
310
311 /* return values for ->qc_defer */
312 ATA_DEFER_LINK = 1,
313 ATA_DEFER_PORT = 2,
314
315 /* desc_len for ata_eh_info and context */
316 ATA_EH_DESC_LEN = 80,
317
318 /* reset / recovery action types */
319 ATA_EH_REVALIDATE = (1 << 0),
320 ATA_EH_SOFTRESET = (1 << 1), /* meaningful only in ->prereset */
321 ATA_EH_HARDRESET = (1 << 2), /* meaningful only in ->prereset */
322 ATA_EH_RESET = ATA_EH_SOFTRESET | ATA_EH_HARDRESET,
323 ATA_EH_ENABLE_LINK = (1 << 3),
324 ATA_EH_PARK = (1 << 5), /* unload heads and stop I/O */
325
326 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE | ATA_EH_PARK,
327 ATA_EH_ALL_ACTIONS = ATA_EH_REVALIDATE | ATA_EH_RESET |
328 ATA_EH_ENABLE_LINK,
329
330 /* ata_eh_info->flags */
331 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */
332 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */
333 ATA_EHI_QUIET = (1 << 3), /* be quiet */
334 ATA_EHI_NO_RECOVERY = (1 << 4), /* no recovery */
335
336 ATA_EHI_DID_SOFTRESET = (1 << 16), /* already soft-reset this port */
337 ATA_EHI_DID_HARDRESET = (1 << 17), /* already soft-reset this port */
338 ATA_EHI_PRINTINFO = (1 << 18), /* print configuration info */
339 ATA_EHI_SETMODE = (1 << 19), /* configure transfer mode */
340 ATA_EHI_POST_SETMODE = (1 << 20), /* revalidating after setmode */
341
342 ATA_EHI_DID_RESET = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET,
343
344 /* mask of flags to transfer *to* the slave link */
345 ATA_EHI_TO_SLAVE_MASK = ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET,
346
347 /* max tries if error condition is still set after ->error_handler */
348 ATA_EH_MAX_TRIES = 5,
349
350 /* sometimes resuming a link requires several retries */
351 ATA_LINK_RESUME_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 = 6,
365
366 /* Horkage types. May be set by libata or controller on drives
367 (some horkage may be drive/controller pair dependent */
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_IVB = (1 << 8), /* cbl det validity bit bugs */
377 ATA_HORKAGE_STUCK_ERR = (1 << 9), /* stuck ERR on next PACKET */
378 ATA_HORKAGE_BRIDGE_OK = (1 << 10), /* no bridge limits */
379 ATA_HORKAGE_ATAPI_MOD16_DMA = (1 << 11), /* use ATAPI DMA for commands
380 not multiple of 16 bytes */
381 ATA_HORKAGE_FIRMWARE_WARN = (1 << 12), /* firmware update warning */
382 ATA_HORKAGE_1_5_GBPS = (1 << 13), /* force 1.5 Gbps */
383 ATA_HORKAGE_NOSETXFER = (1 << 14), /* skip SETXFER, SATA only */
384 ATA_HORKAGE_BROKEN_FPDMA_AA = (1 << 15), /* skip AA */
385 ATA_HORKAGE_DUMP_ID = (1 << 16), /* dump IDENTIFY data */
386
387 /* DMA mask for user DMA control: User visible values; DO NOT
388 renumber */
389 ATA_DMA_MASK_ATA = (1 << 0), /* DMA on ATA Disk */
390 ATA_DMA_MASK_ATAPI = (1 << 1), /* DMA on ATAPI */
391 ATA_DMA_MASK_CFA = (1 << 2), /* DMA on CF Card */
392
393 /* ATAPI command types */
394 ATAPI_READ = 0, /* READs */
395 ATAPI_WRITE = 1, /* WRITEs */
396 ATAPI_READ_CD = 2, /* READ CD [MSF] */
397 ATAPI_PASS_THRU = 3, /* SAT pass-thru */
398 ATAPI_MISC = 4, /* the rest */
399
400 /* Timing constants */
401 ATA_TIMING_SETUP = (1 << 0),
402 ATA_TIMING_ACT8B = (1 << 1),
403 ATA_TIMING_REC8B = (1 << 2),
404 ATA_TIMING_CYC8B = (1 << 3),
405 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
406 ATA_TIMING_CYC8B,
407 ATA_TIMING_ACTIVE = (1 << 4),
408 ATA_TIMING_RECOVER = (1 << 5),
409 ATA_TIMING_DMACK_HOLD = (1 << 6),
410 ATA_TIMING_CYCLE = (1 << 7),
411 ATA_TIMING_UDMA = (1 << 8),
412 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
413 ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
414 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
415 ATA_TIMING_DMACK_HOLD | ATA_TIMING_CYCLE |
416 ATA_TIMING_UDMA,
417
418 /* ACPI constants */
419 ATA_ACPI_FILTER_SETXFER = 1 << 0,
420 ATA_ACPI_FILTER_LOCK = 1 << 1,
421 ATA_ACPI_FILTER_DIPM = 1 << 2,
422 ATA_ACPI_FILTER_FPDMA_OFFSET = 1 << 3, /* FPDMA non-zero offset */
423 ATA_ACPI_FILTER_FPDMA_AA = 1 << 4, /* FPDMA auto activate */
424
425 ATA_ACPI_FILTER_DEFAULT = ATA_ACPI_FILTER_SETXFER |
426 ATA_ACPI_FILTER_LOCK |
427 ATA_ACPI_FILTER_DIPM,
428 };
429
430 enum ata_xfer_mask {
431 ATA_MASK_PIO = ((1LU << ATA_NR_PIO_MODES) - 1)
432 << ATA_SHIFT_PIO,
433 ATA_MASK_MWDMA = ((1LU << ATA_NR_MWDMA_MODES) - 1)
434 << ATA_SHIFT_MWDMA,
435 ATA_MASK_UDMA = ((1LU << ATA_NR_UDMA_MODES) - 1)
436 << ATA_SHIFT_UDMA,
437 };
438
439 enum hsm_task_states {
440 HSM_ST_IDLE, /* no command on going */
441 HSM_ST_FIRST, /* (waiting the device to)
442 write CDB or first data block */
443 HSM_ST, /* (waiting the device to) transfer data */
444 HSM_ST_LAST, /* (waiting the device to) complete command */
445 HSM_ST_ERR, /* error */
446 };
447
448 enum ata_completion_errors {
449 AC_ERR_DEV = (1 << 0), /* device reported error */
450 AC_ERR_HSM = (1 << 1), /* host state machine violation */
451 AC_ERR_TIMEOUT = (1 << 2), /* timeout */
452 AC_ERR_MEDIA = (1 << 3), /* media error */
453 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */
454 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */
455 AC_ERR_SYSTEM = (1 << 6), /* system error */
456 AC_ERR_INVALID = (1 << 7), /* invalid argument */
457 AC_ERR_OTHER = (1 << 8), /* unknown */
458 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */
459 AC_ERR_NCQ = (1 << 10), /* marker for offending NCQ qc */
460 };
461
462 /*
463 * Link power management policy: If you alter this, you also need to
464 * alter libata-scsi.c (for the ascii descriptions)
465 */
466 enum ata_lpm_policy {
467 ATA_LPM_UNKNOWN,
468 ATA_LPM_MAX_POWER,
469 ATA_LPM_MED_POWER,
470 ATA_LPM_MIN_POWER,
471 };
472
473 enum ata_lpm_hints {
474 ATA_LPM_EMPTY = (1 << 0), /* port empty/probing */
475 ATA_LPM_HIPM = (1 << 1), /* may use HIPM */
476 };
477
478 /* forward declarations */
479 struct scsi_device;
480 struct ata_port_operations;
481 struct ata_port;
482 struct ata_link;
483 struct ata_queued_cmd;
484
485 /* typedefs */
486 typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
487 typedef int (*ata_prereset_fn_t)(struct ata_link *link, unsigned long deadline);
488 typedef int (*ata_reset_fn_t)(struct ata_link *link, unsigned int *classes,
489 unsigned long deadline);
490 typedef void (*ata_postreset_fn_t)(struct ata_link *link, unsigned int *classes);
491
492 extern struct device_attribute dev_attr_link_power_management_policy;
493 extern struct device_attribute dev_attr_unload_heads;
494 extern struct device_attribute dev_attr_em_message_type;
495 extern struct device_attribute dev_attr_em_message;
496 extern struct device_attribute dev_attr_sw_activity;
497
498 enum sw_activity {
499 OFF,
500 BLINK_ON,
501 BLINK_OFF,
502 };
503
504 #ifdef CONFIG_ATA_SFF
505 struct ata_ioports {
506 void __iomem *cmd_addr;
507 void __iomem *data_addr;
508 void __iomem *error_addr;
509 void __iomem *feature_addr;
510 void __iomem *nsect_addr;
511 void __iomem *lbal_addr;
512 void __iomem *lbam_addr;
513 void __iomem *lbah_addr;
514 void __iomem *device_addr;
515 void __iomem *status_addr;
516 void __iomem *command_addr;
517 void __iomem *altstatus_addr;
518 void __iomem *ctl_addr;
519 #ifdef CONFIG_ATA_BMDMA
520 void __iomem *bmdma_addr;
521 #endif /* CONFIG_ATA_BMDMA */
522 void __iomem *scr_addr;
523 };
524 #endif /* CONFIG_ATA_SFF */
525
526 struct ata_host {
527 spinlock_t lock;
528 struct device *dev;
529 void __iomem * const *iomap;
530 unsigned int n_ports;
531 void *private_data;
532 struct ata_port_operations *ops;
533 unsigned long flags;
534
535 struct mutex eh_mutex;
536 struct task_struct *eh_owner;
537
538 #ifdef CONFIG_ATA_ACPI
539 acpi_handle acpi_handle;
540 #endif
541 struct ata_port *simplex_claimed; /* channel owning the DMA */
542 struct ata_port *ports[0];
543 };
544
545 struct ata_queued_cmd {
546 struct ata_port *ap;
547 struct ata_device *dev;
548
549 struct scsi_cmnd *scsicmd;
550 void (*scsidone)(struct scsi_cmnd *);
551
552 struct ata_taskfile tf;
553 u8 cdb[ATAPI_CDB_LEN];
554
555 unsigned long flags; /* ATA_QCFLAG_xxx */
556 unsigned int tag;
557 unsigned int n_elem;
558 unsigned int orig_n_elem;
559
560 int dma_dir;
561
562 unsigned int sect_size;
563
564 unsigned int nbytes;
565 unsigned int extrabytes;
566 unsigned int curbytes;
567
568 struct scatterlist sgent;
569
570 struct scatterlist *sg;
571
572 struct scatterlist *cursg;
573 unsigned int cursg_ofs;
574
575 unsigned int err_mask;
576 struct ata_taskfile result_tf;
577 ata_qc_cb_t complete_fn;
578
579 void *private_data;
580 void *lldd_task;
581 };
582
583 struct ata_port_stats {
584 unsigned long unhandled_irq;
585 unsigned long idle_irq;
586 unsigned long rw_reqbuf;
587 };
588
589 struct ata_ering_entry {
590 unsigned int eflags;
591 unsigned int err_mask;
592 u64 timestamp;
593 };
594
595 struct ata_ering {
596 int cursor;
597 struct ata_ering_entry ring[ATA_ERING_SIZE];
598 };
599
600 struct ata_device {
601 struct ata_link *link;
602 unsigned int devno; /* 0 or 1 */
603 unsigned int horkage; /* List of broken features */
604 unsigned long flags; /* ATA_DFLAG_xxx */
605 struct scsi_device *sdev; /* attached SCSI device */
606 void *private_data;
607 #ifdef CONFIG_ATA_ACPI
608 acpi_handle acpi_handle;
609 union acpi_object *gtf_cache;
610 unsigned int gtf_filter;
611 #endif
612 struct device tdev;
613 /* n_sector is CLEAR_BEGIN, read comment above CLEAR_BEGIN */
614 u64 n_sectors; /* size of device, if ATA */
615 u64 n_native_sectors; /* native size, if ATA */
616 unsigned int class; /* ATA_DEV_xxx */
617 unsigned long unpark_deadline;
618
619 u8 pio_mode;
620 u8 dma_mode;
621 u8 xfer_mode;
622 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
623
624 unsigned int multi_count; /* sectors count for
625 READ/WRITE MULTIPLE */
626 unsigned int max_sectors; /* per-device max sectors */
627 unsigned int cdb_len;
628
629 /* per-dev xfer mask */
630 unsigned long pio_mask;
631 unsigned long mwdma_mask;
632 unsigned long udma_mask;
633
634 /* for CHS addressing */
635 u16 cylinders; /* Number of cylinders */
636 u16 heads; /* Number of heads */
637 u16 sectors; /* Number of sectors per track */
638
639 union {
640 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
641 u32 gscr[SATA_PMP_GSCR_DWORDS]; /* PMP GSCR block */
642 };
643
644 /* error history */
645 int spdn_cnt;
646 /* ering is CLEAR_END, read comment above CLEAR_END */
647 struct ata_ering ering;
648 };
649
650 /* Fields between ATA_DEVICE_CLEAR_BEGIN and ATA_DEVICE_CLEAR_END are
651 * cleared to zero on ata_dev_init().
652 */
653 #define ATA_DEVICE_CLEAR_BEGIN offsetof(struct ata_device, n_sectors)
654 #define ATA_DEVICE_CLEAR_END offsetof(struct ata_device, ering)
655
656 struct ata_eh_info {
657 struct ata_device *dev; /* offending device */
658 u32 serror; /* SError from LLDD */
659 unsigned int err_mask; /* port-wide err_mask */
660 unsigned int action; /* ATA_EH_* action mask */
661 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */
662 unsigned int flags; /* ATA_EHI_* flags */
663
664 unsigned int probe_mask;
665
666 char desc[ATA_EH_DESC_LEN];
667 int desc_len;
668 };
669
670 struct ata_eh_context {
671 struct ata_eh_info i;
672 int tries[ATA_MAX_DEVICES];
673 int cmd_timeout_idx[ATA_MAX_DEVICES]
674 [ATA_EH_CMD_TIMEOUT_TABLE_SIZE];
675 unsigned int classes[ATA_MAX_DEVICES];
676 unsigned int did_probe_mask;
677 unsigned int unloaded_mask;
678 unsigned int saved_ncq_enabled;
679 u8 saved_xfer_mode[ATA_MAX_DEVICES];
680 /* timestamp for the last reset attempt or success */
681 unsigned long last_reset;
682 };
683
684 struct ata_acpi_drive
685 {
686 u32 pio;
687 u32 dma;
688 } __packed;
689
690 struct ata_acpi_gtm {
691 struct ata_acpi_drive drive[2];
692 u32 flags;
693 } __packed;
694
695 struct ata_link {
696 struct ata_port *ap;
697 int pmp; /* port multiplier port # */
698
699 struct device tdev;
700 unsigned int active_tag; /* active tag on this link */
701 u32 sactive; /* active NCQ commands */
702
703 unsigned int flags; /* ATA_LFLAG_xxx */
704
705 u32 saved_scontrol; /* SControl on probe */
706 unsigned int hw_sata_spd_limit;
707 unsigned int sata_spd_limit;
708 unsigned int sata_spd; /* current SATA PHY speed */
709 enum ata_lpm_policy lpm_policy;
710
711 /* record runtime error info, protected by host_set lock */
712 struct ata_eh_info eh_info;
713 /* EH context */
714 struct ata_eh_context eh_context;
715
716 struct ata_device device[ATA_MAX_DEVICES];
717 };
718 #define ATA_LINK_CLEAR_BEGIN offsetof(struct ata_link, active_tag)
719 #define ATA_LINK_CLEAR_END offsetof(struct ata_link, device[0])
720
721 struct ata_port {
722 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */
723 struct ata_port_operations *ops;
724 spinlock_t *lock;
725 /* Flags owned by the EH context. Only EH should touch these once the
726 port is active */
727 unsigned long flags; /* ATA_FLAG_xxx */
728 /* Flags that change dynamically, protected by ap->lock */
729 unsigned int pflags; /* ATA_PFLAG_xxx */
730 unsigned int print_id; /* user visible unique port ID */
731 unsigned int port_no; /* 0 based port no. inside the host */
732
733 #ifdef CONFIG_ATA_SFF
734 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
735 u8 ctl; /* cache of ATA control register */
736 u8 last_ctl; /* Cache last written value */
737 struct ata_link* sff_pio_task_link; /* link currently used */
738 struct delayed_work sff_pio_task;
739 #ifdef CONFIG_ATA_BMDMA
740 struct ata_bmdma_prd *bmdma_prd; /* BMDMA SG list */
741 dma_addr_t bmdma_prd_dma; /* and its DMA mapping */
742 #endif /* CONFIG_ATA_BMDMA */
743 #endif /* CONFIG_ATA_SFF */
744
745 unsigned int pio_mask;
746 unsigned int mwdma_mask;
747 unsigned int udma_mask;
748 unsigned int cbl; /* cable type; ATA_CBL_xxx */
749
750 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
751 unsigned long qc_allocated;
752 unsigned int qc_active;
753 int nr_active_links; /* #links with active qcs */
754
755 struct ata_link link; /* host default link */
756 struct ata_link *slave_link; /* see ata_slave_link_init() */
757
758 int nr_pmp_links; /* nr of available PMP links */
759 struct ata_link *pmp_link; /* array of PMP links */
760 struct ata_link *excl_link; /* for PMP qc exclusion */
761
762 struct ata_port_stats stats;
763 struct ata_host *host;
764 struct device *dev;
765 struct device tdev;
766
767 struct mutex scsi_scan_mutex;
768 struct delayed_work hotplug_task;
769 struct work_struct scsi_rescan_task;
770
771 unsigned int hsm_task_state;
772
773 u32 msg_enable;
774 struct list_head eh_done_q;
775 wait_queue_head_t eh_wait_q;
776 int eh_tries;
777 struct completion park_req_pending;
778
779 pm_message_t pm_mesg;
780 int *pm_result;
781 enum ata_lpm_policy target_lpm_policy;
782
783 struct timer_list fastdrain_timer;
784 unsigned long fastdrain_cnt;
785
786 int em_message_type;
787 void *private_data;
788
789 #ifdef CONFIG_ATA_ACPI
790 acpi_handle acpi_handle;
791 struct ata_acpi_gtm __acpi_init_gtm; /* use ata_acpi_init_gtm() */
792 #endif
793 /* owned by EH */
794 u8 sector_buf[ATA_SECT_SIZE] ____cacheline_aligned;
795 };
796
797 /* The following initializer overrides a method to NULL whether one of
798 * its parent has the method defined or not. This is equivalent to
799 * ERR_PTR(-ENOENT). Unfortunately, ERR_PTR doesn't render a constant
800 * expression and thus can't be used as an initializer.
801 */
802 #define ATA_OP_NULL (void *)(unsigned long)(-ENOENT)
803
804 struct ata_port_operations {
805 /*
806 * Command execution
807 */
808 int (*qc_defer)(struct ata_queued_cmd *qc);
809 int (*check_atapi_dma)(struct ata_queued_cmd *qc);
810 void (*qc_prep)(struct ata_queued_cmd *qc);
811 unsigned int (*qc_issue)(struct ata_queued_cmd *qc);
812 bool (*qc_fill_rtf)(struct ata_queued_cmd *qc);
813
814 /*
815 * Configuration and exception handling
816 */
817 int (*cable_detect)(struct ata_port *ap);
818 unsigned long (*mode_filter)(struct ata_device *dev, unsigned long xfer_mask);
819 void (*set_piomode)(struct ata_port *ap, struct ata_device *dev);
820 void (*set_dmamode)(struct ata_port *ap, struct ata_device *dev);
821 int (*set_mode)(struct ata_link *link, struct ata_device **r_failed_dev);
822 unsigned int (*read_id)(struct ata_device *dev, struct ata_taskfile *tf, u16 *id);
823
824 void (*dev_config)(struct ata_device *dev);
825
826 void (*freeze)(struct ata_port *ap);
827 void (*thaw)(struct ata_port *ap);
828 ata_prereset_fn_t prereset;
829 ata_reset_fn_t softreset;
830 ata_reset_fn_t hardreset;
831 ata_postreset_fn_t postreset;
832 ata_prereset_fn_t pmp_prereset;
833 ata_reset_fn_t pmp_softreset;
834 ata_reset_fn_t pmp_hardreset;
835 ata_postreset_fn_t pmp_postreset;
836 void (*error_handler)(struct ata_port *ap);
837 void (*lost_interrupt)(struct ata_port *ap);
838 void (*post_internal_cmd)(struct ata_queued_cmd *qc);
839
840 /*
841 * Optional features
842 */
843 int (*scr_read)(struct ata_link *link, unsigned int sc_reg, u32 *val);
844 int (*scr_write)(struct ata_link *link, unsigned int sc_reg, u32 val);
845 void (*pmp_attach)(struct ata_port *ap);
846 void (*pmp_detach)(struct ata_port *ap);
847 int (*set_lpm)(struct ata_link *link, enum ata_lpm_policy policy,
848 unsigned hints);
849
850 /*
851 * Start, stop, suspend and resume
852 */
853 int (*port_suspend)(struct ata_port *ap, pm_message_t mesg);
854 int (*port_resume)(struct ata_port *ap);
855 int (*port_start)(struct ata_port *ap);
856 void (*port_stop)(struct ata_port *ap);
857 void (*host_stop)(struct ata_host *host);
858
859 #ifdef CONFIG_ATA_SFF
860 /*
861 * SFF / taskfile oriented ops
862 */
863 void (*sff_dev_select)(struct ata_port *ap, unsigned int device);
864 void (*sff_set_devctl)(struct ata_port *ap, u8 ctl);
865 u8 (*sff_check_status)(struct ata_port *ap);
866 u8 (*sff_check_altstatus)(struct ata_port *ap);
867 void (*sff_tf_load)(struct ata_port *ap, const struct ata_taskfile *tf);
868 void (*sff_tf_read)(struct ata_port *ap, struct ata_taskfile *tf);
869 void (*sff_exec_command)(struct ata_port *ap,
870 const struct ata_taskfile *tf);
871 unsigned int (*sff_data_xfer)(struct ata_device *dev,
872 unsigned char *buf, unsigned int buflen, int rw);
873 void (*sff_irq_on)(struct ata_port *);
874 bool (*sff_irq_check)(struct ata_port *);
875 void (*sff_irq_clear)(struct ata_port *);
876 void (*sff_drain_fifo)(struct ata_queued_cmd *qc);
877
878 #ifdef CONFIG_ATA_BMDMA
879 void (*bmdma_setup)(struct ata_queued_cmd *qc);
880 void (*bmdma_start)(struct ata_queued_cmd *qc);
881 void (*bmdma_stop)(struct ata_queued_cmd *qc);
882 u8 (*bmdma_status)(struct ata_port *ap);
883 #endif /* CONFIG_ATA_BMDMA */
884 #endif /* CONFIG_ATA_SFF */
885
886 ssize_t (*em_show)(struct ata_port *ap, char *buf);
887 ssize_t (*em_store)(struct ata_port *ap, const char *message,
888 size_t size);
889 ssize_t (*sw_activity_show)(struct ata_device *dev, char *buf);
890 ssize_t (*sw_activity_store)(struct ata_device *dev,
891 enum sw_activity val);
892 /*
893 * Obsolete
894 */
895 void (*phy_reset)(struct ata_port *ap);
896 void (*eng_timeout)(struct ata_port *ap);
897
898 /*
899 * ->inherits must be the last field and all the preceding
900 * fields must be pointers.
901 */
902 const struct ata_port_operations *inherits;
903 };
904
905 struct ata_port_info {
906 unsigned long flags;
907 unsigned long link_flags;
908 unsigned long pio_mask;
909 unsigned long mwdma_mask;
910 unsigned long udma_mask;
911 struct ata_port_operations *port_ops;
912 void *private_data;
913 };
914
915 struct ata_timing {
916 unsigned short mode; /* ATA mode */
917 unsigned short setup; /* t1 */
918 unsigned short act8b; /* t2 for 8-bit I/O */
919 unsigned short rec8b; /* t2i for 8-bit I/O */
920 unsigned short cyc8b; /* t0 for 8-bit I/O */
921 unsigned short active; /* t2 or tD */
922 unsigned short recover; /* t2i or tK */
923 unsigned short dmack_hold; /* tj */
924 unsigned short cycle; /* t0 */
925 unsigned short udma; /* t2CYCTYP/2 */
926 };
927
928 /*
929 * Core layer - drivers/ata/libata-core.c
930 */
931 extern const unsigned long sata_deb_timing_normal[];
932 extern const unsigned long sata_deb_timing_hotplug[];
933 extern const unsigned long sata_deb_timing_long[];
934
935 extern struct ata_port_operations ata_dummy_port_ops;
936 extern const struct ata_port_info ata_dummy_port_info;
937
938 static inline const unsigned long *
939 sata_ehc_deb_timing(struct ata_eh_context *ehc)
940 {
941 if (ehc->i.flags & ATA_EHI_HOTPLUGGED)
942 return sata_deb_timing_hotplug;
943 else
944 return sata_deb_timing_normal;
945 }
946
947 static inline int ata_port_is_dummy(struct ata_port *ap)
948 {
949 return ap->ops == &ata_dummy_port_ops;
950 }
951
952 extern int sata_set_spd(struct ata_link *link);
953 extern int ata_std_prereset(struct ata_link *link, unsigned long deadline);
954 extern int ata_wait_after_reset(struct ata_link *link, unsigned long deadline,
955 int (*check_ready)(struct ata_link *link));
956 extern int sata_link_debounce(struct ata_link *link,
957 const unsigned long *params, unsigned long deadline);
958 extern int sata_link_resume(struct ata_link *link, const unsigned long *params,
959 unsigned long deadline);
960 extern int sata_link_scr_lpm(struct ata_link *link, enum ata_lpm_policy policy,
961 bool spm_wakeup);
962 extern int sata_link_hardreset(struct ata_link *link,
963 const unsigned long *timing, unsigned long deadline,
964 bool *online, int (*check_ready)(struct ata_link *));
965 extern int sata_std_hardreset(struct ata_link *link, unsigned int *class,
966 unsigned long deadline);
967 extern void ata_std_postreset(struct ata_link *link, unsigned int *classes);
968
969 extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports);
970 extern struct ata_host *ata_host_alloc_pinfo(struct device *dev,
971 const struct ata_port_info * const * ppi, int n_ports);
972 extern int ata_slave_link_init(struct ata_port *ap);
973 extern int ata_host_start(struct ata_host *host);
974 extern int ata_host_register(struct ata_host *host,
975 struct scsi_host_template *sht);
976 extern int ata_host_activate(struct ata_host *host, int irq,
977 irq_handler_t irq_handler, unsigned long irq_flags,
978 struct scsi_host_template *sht);
979 extern void ata_host_detach(struct ata_host *host);
980 extern void ata_host_init(struct ata_host *, struct device *,
981 unsigned long, struct ata_port_operations *);
982 extern int ata_scsi_detect(struct scsi_host_template *sht);
983 extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
984 extern int ata_scsi_queuecmd(struct Scsi_Host *h, struct scsi_cmnd *cmd);
985 extern int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *dev,
986 int cmd, void __user *arg);
987 extern void ata_sas_port_destroy(struct ata_port *);
988 extern struct ata_port *ata_sas_port_alloc(struct ata_host *,
989 struct ata_port_info *, struct Scsi_Host *);
990 extern int ata_sas_port_init(struct ata_port *);
991 extern int ata_sas_port_start(struct ata_port *ap);
992 extern void ata_sas_port_stop(struct ata_port *ap);
993 extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *);
994 extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, struct ata_port *ap);
995 extern int sata_scr_valid(struct ata_link *link);
996 extern int sata_scr_read(struct ata_link *link, int reg, u32 *val);
997 extern int sata_scr_write(struct ata_link *link, int reg, u32 val);
998 extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val);
999 extern bool ata_link_online(struct ata_link *link);
1000 extern bool ata_link_offline(struct ata_link *link);
1001 #ifdef CONFIG_PM
1002 extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg);
1003 extern void ata_host_resume(struct ata_host *host);
1004 #endif
1005 extern int ata_ratelimit(void);
1006 extern void ata_msleep(struct ata_port *ap, unsigned int msecs);
1007 extern u32 ata_wait_register(struct ata_port *ap, void __iomem *reg, u32 mask,
1008 u32 val, unsigned long interval, unsigned long timeout);
1009 extern int atapi_cmd_type(u8 opcode);
1010 extern void ata_tf_to_fis(const struct ata_taskfile *tf,
1011 u8 pmp, int is_cmd, u8 *fis);
1012 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
1013 extern unsigned long ata_pack_xfermask(unsigned long pio_mask,
1014 unsigned long mwdma_mask, unsigned long udma_mask);
1015 extern void ata_unpack_xfermask(unsigned long xfer_mask,
1016 unsigned long *pio_mask, unsigned long *mwdma_mask,
1017 unsigned long *udma_mask);
1018 extern u8 ata_xfer_mask2mode(unsigned long xfer_mask);
1019 extern unsigned long ata_xfer_mode2mask(u8 xfer_mode);
1020 extern int ata_xfer_mode2shift(unsigned long xfer_mode);
1021 extern const char *ata_mode_string(unsigned long xfer_mask);
1022 extern unsigned long ata_id_xfermask(const u16 *id);
1023 extern int ata_std_qc_defer(struct ata_queued_cmd *qc);
1024 extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
1025 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
1026 unsigned int n_elem);
1027 extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
1028 extern void ata_dev_disable(struct ata_device *adev);
1029 extern void ata_id_string(const u16 *id, unsigned char *s,
1030 unsigned int ofs, unsigned int len);
1031 extern void ata_id_c_string(const u16 *id, unsigned char *s,
1032 unsigned int ofs, unsigned int len);
1033 extern unsigned int ata_do_dev_read_id(struct ata_device *dev,
1034 struct ata_taskfile *tf, u16 *id);
1035 extern void ata_qc_complete(struct ata_queued_cmd *qc);
1036 extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active);
1037 extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd);
1038 extern int ata_std_bios_param(struct scsi_device *sdev,
1039 struct block_device *bdev,
1040 sector_t capacity, int geom[]);
1041 extern void ata_scsi_unlock_native_capacity(struct scsi_device *sdev);
1042 extern int ata_scsi_slave_config(struct scsi_device *sdev);
1043 extern void ata_scsi_slave_destroy(struct scsi_device *sdev);
1044 extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
1045 int queue_depth, int reason);
1046 extern struct ata_device *ata_dev_pair(struct ata_device *adev);
1047 extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev);
1048 extern void ata_scsi_port_error_handler(struct Scsi_Host *host, struct ata_port *ap);
1049 extern void ata_scsi_cmd_error_handler(struct Scsi_Host *host, struct ata_port *ap, struct list_head *eh_q);
1050
1051 extern int ata_cable_40wire(struct ata_port *ap);
1052 extern int ata_cable_80wire(struct ata_port *ap);
1053 extern int ata_cable_sata(struct ata_port *ap);
1054 extern int ata_cable_ignore(struct ata_port *ap);
1055 extern int ata_cable_unknown(struct ata_port *ap);
1056
1057 /* Timing helpers */
1058 extern unsigned int ata_pio_need_iordy(const struct ata_device *);
1059 extern const struct ata_timing *ata_timing_find_mode(u8 xfer_mode);
1060 extern int ata_timing_compute(struct ata_device *, unsigned short,
1061 struct ata_timing *, int, int);
1062 extern void ata_timing_merge(const struct ata_timing *,
1063 const struct ata_timing *, struct ata_timing *,
1064 unsigned int);
1065 extern u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle);
1066
1067 /* PCI */
1068 #ifdef CONFIG_PCI
1069 struct pci_dev;
1070
1071 struct pci_bits {
1072 unsigned int reg; /* PCI config register to read */
1073 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
1074 unsigned long mask;
1075 unsigned long val;
1076 };
1077
1078 extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
1079 extern void ata_pci_remove_one(struct pci_dev *pdev);
1080
1081 #ifdef CONFIG_PM
1082 extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg);
1083 extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev);
1084 extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
1085 extern int ata_pci_device_resume(struct pci_dev *pdev);
1086 #endif /* CONFIG_PM */
1087 #endif /* CONFIG_PCI */
1088
1089 /*
1090 * ACPI - drivers/ata/libata-acpi.c
1091 */
1092 #ifdef CONFIG_ATA_ACPI
1093 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
1094 {
1095 if (ap->pflags & ATA_PFLAG_INIT_GTM_VALID)
1096 return &ap->__acpi_init_gtm;
1097 return NULL;
1098 }
1099 int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm);
1100 int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *stm);
1101 unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev,
1102 const struct ata_acpi_gtm *gtm);
1103 int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm);
1104 #else
1105 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
1106 {
1107 return NULL;
1108 }
1109
1110 static inline int ata_acpi_stm(const struct ata_port *ap,
1111 struct ata_acpi_gtm *stm)
1112 {
1113 return -ENOSYS;
1114 }
1115
1116 static inline int ata_acpi_gtm(const struct ata_port *ap,
1117 struct ata_acpi_gtm *stm)
1118 {
1119 return -ENOSYS;
1120 }
1121
1122 static inline unsigned int ata_acpi_gtm_xfermask(struct ata_device *dev,
1123 const struct ata_acpi_gtm *gtm)
1124 {
1125 return 0;
1126 }
1127
1128 static inline int ata_acpi_cbl_80wire(struct ata_port *ap,
1129 const struct ata_acpi_gtm *gtm)
1130 {
1131 return 0;
1132 }
1133 #endif
1134
1135 /*
1136 * EH - drivers/ata/libata-eh.c
1137 */
1138 extern void ata_port_schedule_eh(struct ata_port *ap);
1139 extern int ata_link_abort(struct ata_link *link);
1140 extern int ata_port_abort(struct ata_port *ap);
1141 extern int ata_port_freeze(struct ata_port *ap);
1142 extern int sata_async_notification(struct ata_port *ap);
1143
1144 extern void ata_eh_freeze_port(struct ata_port *ap);
1145 extern void ata_eh_thaw_port(struct ata_port *ap);
1146
1147 extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
1148 extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
1149 extern void ata_eh_analyze_ncq_error(struct ata_link *link);
1150
1151 extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
1152 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
1153 ata_postreset_fn_t postreset);
1154 extern void ata_std_error_handler(struct ata_port *ap);
1155
1156 /*
1157 * Base operations to inherit from and initializers for sht
1158 *
1159 * Operations
1160 *
1161 * base : Common to all libata drivers.
1162 * sata : SATA controllers w/ native interface.
1163 * pmp : SATA controllers w/ PMP support.
1164 * sff : SFF ATA controllers w/o BMDMA support.
1165 * bmdma : SFF ATA controllers w/ BMDMA support.
1166 *
1167 * sht initializers
1168 *
1169 * BASE : Common to all libata drivers. The user must set
1170 * sg_tablesize and dma_boundary.
1171 * PIO : SFF ATA controllers w/ only PIO support.
1172 * BMDMA : SFF ATA controllers w/ BMDMA support. sg_tablesize and
1173 * dma_boundary are set to BMDMA limits.
1174 * NCQ : SATA controllers supporting NCQ. The user must set
1175 * sg_tablesize, dma_boundary and can_queue.
1176 */
1177 extern const struct ata_port_operations ata_base_port_ops;
1178 extern const struct ata_port_operations sata_port_ops;
1179 extern struct device_attribute *ata_common_sdev_attrs[];
1180
1181 #define ATA_BASE_SHT(drv_name) \
1182 .module = THIS_MODULE, \
1183 .name = drv_name, \
1184 .ioctl = ata_scsi_ioctl, \
1185 .queuecommand = ata_scsi_queuecmd, \
1186 .can_queue = ATA_DEF_QUEUE, \
1187 .this_id = ATA_SHT_THIS_ID, \
1188 .cmd_per_lun = ATA_SHT_CMD_PER_LUN, \
1189 .emulated = ATA_SHT_EMULATED, \
1190 .use_clustering = ATA_SHT_USE_CLUSTERING, \
1191 .proc_name = drv_name, \
1192 .slave_configure = ata_scsi_slave_config, \
1193 .slave_destroy = ata_scsi_slave_destroy, \
1194 .bios_param = ata_std_bios_param, \
1195 .unlock_native_capacity = ata_scsi_unlock_native_capacity, \
1196 .sdev_attrs = ata_common_sdev_attrs
1197
1198 #define ATA_NCQ_SHT(drv_name) \
1199 ATA_BASE_SHT(drv_name), \
1200 .change_queue_depth = ata_scsi_change_queue_depth
1201
1202 /*
1203 * PMP helpers
1204 */
1205 #ifdef CONFIG_SATA_PMP
1206 static inline bool sata_pmp_supported(struct ata_port *ap)
1207 {
1208 return ap->flags & ATA_FLAG_PMP;
1209 }
1210
1211 static inline bool sata_pmp_attached(struct ata_port *ap)
1212 {
1213 return ap->nr_pmp_links != 0;
1214 }
1215
1216 static inline int ata_is_host_link(const struct ata_link *link)
1217 {
1218 return link == &link->ap->link || link == link->ap->slave_link;
1219 }
1220 #else /* CONFIG_SATA_PMP */
1221 static inline bool sata_pmp_supported(struct ata_port *ap)
1222 {
1223 return false;
1224 }
1225
1226 static inline bool sata_pmp_attached(struct ata_port *ap)
1227 {
1228 return false;
1229 }
1230
1231 static inline int ata_is_host_link(const struct ata_link *link)
1232 {
1233 return 1;
1234 }
1235 #endif /* CONFIG_SATA_PMP */
1236
1237 static inline int sata_srst_pmp(struct ata_link *link)
1238 {
1239 if (sata_pmp_supported(link->ap) && ata_is_host_link(link))
1240 return SATA_PMP_CTRL_PORT;
1241 return link->pmp;
1242 }
1243
1244 /*
1245 * printk helpers
1246 */
1247 #define ata_port_printk(ap, lv, fmt, args...) \
1248 printk("%sata%u: "fmt, lv, (ap)->print_id , ##args)
1249
1250 #define ata_link_printk(link, lv, fmt, args...) do { \
1251 if (sata_pmp_attached((link)->ap) || (link)->ap->slave_link) \
1252 printk("%sata%u.%02u: "fmt, lv, (link)->ap->print_id, \
1253 (link)->pmp , ##args); \
1254 else \
1255 printk("%sata%u: "fmt, lv, (link)->ap->print_id , ##args); \
1256 } while(0)
1257
1258 #define ata_dev_printk(dev, lv, fmt, args...) \
1259 printk("%sata%u.%02u: "fmt, lv, (dev)->link->ap->print_id, \
1260 (dev)->link->pmp + (dev)->devno , ##args)
1261
1262 /*
1263 * ata_eh_info helpers
1264 */
1265 extern void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...)
1266 __attribute__ ((format (printf, 2, 3)));
1267 extern void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...)
1268 __attribute__ ((format (printf, 2, 3)));
1269 extern void ata_ehi_clear_desc(struct ata_eh_info *ehi);
1270
1271 static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
1272 {
1273 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
1274 ehi->flags |= ATA_EHI_HOTPLUGGED;
1275 ehi->action |= ATA_EH_RESET | ATA_EH_ENABLE_LINK;
1276 ehi->err_mask |= AC_ERR_ATA_BUS;
1277 }
1278
1279 /*
1280 * port description helpers
1281 */
1282 extern void ata_port_desc(struct ata_port *ap, const char *fmt, ...)
1283 __attribute__ ((format (printf, 2, 3)));
1284 #ifdef CONFIG_PCI
1285 extern void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset,
1286 const char *name);
1287 #endif
1288
1289 static inline unsigned int ata_tag_valid(unsigned int tag)
1290 {
1291 return (tag < ATA_MAX_QUEUE) ? 1 : 0;
1292 }
1293
1294 static inline unsigned int ata_tag_internal(unsigned int tag)
1295 {
1296 return tag == ATA_TAG_INTERNAL;
1297 }
1298
1299 /*
1300 * device helpers
1301 */
1302 static inline unsigned int ata_class_enabled(unsigned int class)
1303 {
1304 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI ||
1305 class == ATA_DEV_PMP || class == ATA_DEV_SEMB;
1306 }
1307
1308 static inline unsigned int ata_class_disabled(unsigned int class)
1309 {
1310 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP ||
1311 class == ATA_DEV_PMP_UNSUP || class == ATA_DEV_SEMB_UNSUP;
1312 }
1313
1314 static inline unsigned int ata_class_absent(unsigned int class)
1315 {
1316 return !ata_class_enabled(class) && !ata_class_disabled(class);
1317 }
1318
1319 static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
1320 {
1321 return ata_class_enabled(dev->class);
1322 }
1323
1324 static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
1325 {
1326 return ata_class_disabled(dev->class);
1327 }
1328
1329 static inline unsigned int ata_dev_absent(const struct ata_device *dev)
1330 {
1331 return ata_class_absent(dev->class);
1332 }
1333
1334 /*
1335 * link helpers
1336 */
1337 static inline int ata_link_max_devices(const struct ata_link *link)
1338 {
1339 if (ata_is_host_link(link) && link->ap->flags & ATA_FLAG_SLAVE_POSS)
1340 return 2;
1341 return 1;
1342 }
1343
1344 static inline int ata_link_active(struct ata_link *link)
1345 {
1346 return ata_tag_valid(link->active_tag) || link->sactive;
1347 }
1348
1349 /*
1350 * Iterators
1351 *
1352 * ATA_LITER_* constants are used to select link iteration mode and
1353 * ATA_DITER_* device iteration mode.
1354 *
1355 * For a custom iteration directly using ata_{link|dev}_next(), if
1356 * @link or @dev, respectively, is NULL, the first element is
1357 * returned. @dev and @link can be any valid device or link and the
1358 * next element according to the iteration mode will be returned.
1359 * After the last element, NULL is returned.
1360 */
1361 enum ata_link_iter_mode {
1362 ATA_LITER_EDGE, /* if present, PMP links only; otherwise,
1363 * host link. no slave link */
1364 ATA_LITER_HOST_FIRST, /* host link followed by PMP or slave links */
1365 ATA_LITER_PMP_FIRST, /* PMP links followed by host link,
1366 * slave link still comes after host link */
1367 };
1368
1369 enum ata_dev_iter_mode {
1370 ATA_DITER_ENABLED,
1371 ATA_DITER_ENABLED_REVERSE,
1372 ATA_DITER_ALL,
1373 ATA_DITER_ALL_REVERSE,
1374 };
1375
1376 extern struct ata_link *ata_link_next(struct ata_link *link,
1377 struct ata_port *ap,
1378 enum ata_link_iter_mode mode);
1379
1380 extern struct ata_device *ata_dev_next(struct ata_device *dev,
1381 struct ata_link *link,
1382 enum ata_dev_iter_mode mode);
1383
1384 /*
1385 * Shortcut notation for iterations
1386 *
1387 * ata_for_each_link() iterates over each link of @ap according to
1388 * @mode. @link points to the current link in the loop. @link is
1389 * NULL after loop termination. ata_for_each_dev() works the same way
1390 * except that it iterates over each device of @link.
1391 *
1392 * Note that the mode prefixes ATA_{L|D}ITER_ shouldn't need to be
1393 * specified when using the following shorthand notations. Only the
1394 * mode itself (EDGE, HOST_FIRST, ENABLED, etc...) should be
1395 * specified. This not only increases brevity but also makes it
1396 * impossible to use ATA_LITER_* for device iteration or vice-versa.
1397 */
1398 #define ata_for_each_link(link, ap, mode) \
1399 for ((link) = ata_link_next(NULL, (ap), ATA_LITER_##mode); (link); \
1400 (link) = ata_link_next((link), (ap), ATA_LITER_##mode))
1401
1402 #define ata_for_each_dev(dev, link, mode) \
1403 for ((dev) = ata_dev_next(NULL, (link), ATA_DITER_##mode); (dev); \
1404 (dev) = ata_dev_next((dev), (link), ATA_DITER_##mode))
1405
1406 /**
1407 * ata_ncq_enabled - Test whether NCQ is enabled
1408 * @dev: ATA device to test for
1409 *
1410 * LOCKING:
1411 * spin_lock_irqsave(host lock)
1412 *
1413 * RETURNS:
1414 * 1 if NCQ is enabled for @dev, 0 otherwise.
1415 */
1416 static inline int ata_ncq_enabled(struct ata_device *dev)
1417 {
1418 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF |
1419 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ;
1420 }
1421
1422 static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
1423 {
1424 qc->tf.ctl |= ATA_NIEN;
1425 }
1426
1427 static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap,
1428 unsigned int tag)
1429 {
1430 if (likely(ata_tag_valid(tag)))
1431 return &ap->qcmd[tag];
1432 return NULL;
1433 }
1434
1435 static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap,
1436 unsigned int tag)
1437 {
1438 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
1439
1440 if (unlikely(!qc) || !ap->ops->error_handler)
1441 return qc;
1442
1443 if ((qc->flags & (ATA_QCFLAG_ACTIVE |
1444 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE)
1445 return qc;
1446
1447 return NULL;
1448 }
1449
1450 static inline unsigned int ata_qc_raw_nbytes(struct ata_queued_cmd *qc)
1451 {
1452 return qc->nbytes - min(qc->extrabytes, qc->nbytes);
1453 }
1454
1455 static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
1456 {
1457 memset(tf, 0, sizeof(*tf));
1458
1459 #ifdef CONFIG_ATA_SFF
1460 tf->ctl = dev->link->ap->ctl;
1461 #else
1462 tf->ctl = ATA_DEVCTL_OBS;
1463 #endif
1464 if (dev->devno == 0)
1465 tf->device = ATA_DEVICE_OBS;
1466 else
1467 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
1468 }
1469
1470 static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
1471 {
1472 qc->dma_dir = DMA_NONE;
1473 qc->sg = NULL;
1474 qc->flags = 0;
1475 qc->cursg = NULL;
1476 qc->cursg_ofs = 0;
1477 qc->nbytes = qc->extrabytes = qc->curbytes = 0;
1478 qc->n_elem = 0;
1479 qc->err_mask = 0;
1480 qc->sect_size = ATA_SECT_SIZE;
1481
1482 ata_tf_init(qc->dev, &qc->tf);
1483
1484 /* init result_tf such that it indicates normal completion */
1485 qc->result_tf.command = ATA_DRDY;
1486 qc->result_tf.feature = 0;
1487 }
1488
1489 static inline int ata_try_flush_cache(const struct ata_device *dev)
1490 {
1491 return ata_id_wcache_enabled(dev->id) ||
1492 ata_id_has_flush(dev->id) ||
1493 ata_id_has_flush_ext(dev->id);
1494 }
1495
1496 static inline unsigned int ac_err_mask(u8 status)
1497 {
1498 if (status & (ATA_BUSY | ATA_DRQ))
1499 return AC_ERR_HSM;
1500 if (status & (ATA_ERR | ATA_DF))
1501 return AC_ERR_DEV;
1502 return 0;
1503 }
1504
1505 static inline unsigned int __ac_err_mask(u8 status)
1506 {
1507 unsigned int mask = ac_err_mask(status);
1508 if (mask == 0)
1509 return AC_ERR_OTHER;
1510 return mask;
1511 }
1512
1513 static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
1514 {
1515 return *(struct ata_port **)&host->hostdata[0];
1516 }
1517
1518 static inline int ata_check_ready(u8 status)
1519 {
1520 if (!(status & ATA_BUSY))
1521 return 1;
1522
1523 /* 0xff indicates either no device or device not ready */
1524 if (status == 0xff)
1525 return -ENODEV;
1526
1527 return 0;
1528 }
1529
1530 static inline unsigned long ata_deadline(unsigned long from_jiffies,
1531 unsigned long timeout_msecs)
1532 {
1533 return from_jiffies + msecs_to_jiffies(timeout_msecs);
1534 }
1535
1536 /* Don't open code these in drivers as there are traps. Firstly the range may
1537 change in future hardware and specs, secondly 0xFF means 'no DMA' but is
1538 > UDMA_0. Dyma ddreigiau */
1539
1540 static inline int ata_using_mwdma(struct ata_device *adev)
1541 {
1542 if (adev->dma_mode >= XFER_MW_DMA_0 && adev->dma_mode <= XFER_MW_DMA_4)
1543 return 1;
1544 return 0;
1545 }
1546
1547 static inline int ata_using_udma(struct ata_device *adev)
1548 {
1549 if (adev->dma_mode >= XFER_UDMA_0 && adev->dma_mode <= XFER_UDMA_7)
1550 return 1;
1551 return 0;
1552 }
1553
1554 static inline int ata_dma_enabled(struct ata_device *adev)
1555 {
1556 return (adev->dma_mode == 0xFF ? 0 : 1);
1557 }
1558
1559 /**************************************************************************
1560 * PMP - drivers/ata/libata-pmp.c
1561 */
1562 #ifdef CONFIG_SATA_PMP
1563
1564 extern const struct ata_port_operations sata_pmp_port_ops;
1565
1566 extern int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc);
1567 extern void sata_pmp_error_handler(struct ata_port *ap);
1568
1569 #else /* CONFIG_SATA_PMP */
1570
1571 #define sata_pmp_port_ops sata_port_ops
1572 #define sata_pmp_qc_defer_cmd_switch ata_std_qc_defer
1573 #define sata_pmp_error_handler ata_std_error_handler
1574
1575 #endif /* CONFIG_SATA_PMP */
1576
1577
1578 /**************************************************************************
1579 * SFF - drivers/ata/libata-sff.c
1580 */
1581 #ifdef CONFIG_ATA_SFF
1582
1583 extern const struct ata_port_operations ata_sff_port_ops;
1584 extern const struct ata_port_operations ata_bmdma32_port_ops;
1585
1586 /* PIO only, sg_tablesize and dma_boundary limits can be removed */
1587 #define ATA_PIO_SHT(drv_name) \
1588 ATA_BASE_SHT(drv_name), \
1589 .sg_tablesize = LIBATA_MAX_PRD, \
1590 .dma_boundary = ATA_DMA_BOUNDARY
1591
1592 extern void ata_sff_dev_select(struct ata_port *ap, unsigned int device);
1593 extern u8 ata_sff_check_status(struct ata_port *ap);
1594 extern void ata_sff_pause(struct ata_port *ap);
1595 extern void ata_sff_dma_pause(struct ata_port *ap);
1596 extern int ata_sff_busy_sleep(struct ata_port *ap,
1597 unsigned long timeout_pat, unsigned long timeout);
1598 extern int ata_sff_wait_ready(struct ata_link *link, unsigned long deadline);
1599 extern void ata_sff_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
1600 extern void ata_sff_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
1601 extern void ata_sff_exec_command(struct ata_port *ap,
1602 const struct ata_taskfile *tf);
1603 extern unsigned int ata_sff_data_xfer(struct ata_device *dev,
1604 unsigned char *buf, unsigned int buflen, int rw);
1605 extern unsigned int ata_sff_data_xfer32(struct ata_device *dev,
1606 unsigned char *buf, unsigned int buflen, int rw);
1607 extern unsigned int ata_sff_data_xfer_noirq(struct ata_device *dev,
1608 unsigned char *buf, unsigned int buflen, int rw);
1609 extern void ata_sff_irq_on(struct ata_port *ap);
1610 extern void ata_sff_irq_clear(struct ata_port *ap);
1611 extern int ata_sff_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
1612 u8 status, int in_wq);
1613 extern void ata_sff_queue_work(struct work_struct *work);
1614 extern void ata_sff_queue_delayed_work(struct delayed_work *dwork,
1615 unsigned long delay);
1616 extern void ata_sff_queue_pio_task(struct ata_link *link, unsigned long delay);
1617 extern unsigned int ata_sff_qc_issue(struct ata_queued_cmd *qc);
1618 extern bool ata_sff_qc_fill_rtf(struct ata_queued_cmd *qc);
1619 extern unsigned int ata_sff_port_intr(struct ata_port *ap,
1620 struct ata_queued_cmd *qc);
1621 extern irqreturn_t ata_sff_interrupt(int irq, void *dev_instance);
1622 extern void ata_sff_lost_interrupt(struct ata_port *ap);
1623 extern void ata_sff_freeze(struct ata_port *ap);
1624 extern void ata_sff_thaw(struct ata_port *ap);
1625 extern int ata_sff_prereset(struct ata_link *link, unsigned long deadline);
1626 extern unsigned int ata_sff_dev_classify(struct ata_device *dev, int present,
1627 u8 *r_err);
1628 extern int ata_sff_wait_after_reset(struct ata_link *link, unsigned int devmask,
1629 unsigned long deadline);
1630 extern int ata_sff_softreset(struct ata_link *link, unsigned int *classes,
1631 unsigned long deadline);
1632 extern int sata_sff_hardreset(struct ata_link *link, unsigned int *class,
1633 unsigned long deadline);
1634 extern void ata_sff_postreset(struct ata_link *link, unsigned int *classes);
1635 extern void ata_sff_drain_fifo(struct ata_queued_cmd *qc);
1636 extern void ata_sff_error_handler(struct ata_port *ap);
1637 extern void ata_sff_std_ports(struct ata_ioports *ioaddr);
1638 #ifdef CONFIG_PCI
1639 extern int ata_pci_sff_init_host(struct ata_host *host);
1640 extern int ata_pci_sff_prepare_host(struct pci_dev *pdev,
1641 const struct ata_port_info * const * ppi,
1642 struct ata_host **r_host);
1643 extern int ata_pci_sff_activate_host(struct ata_host *host,
1644 irq_handler_t irq_handler,
1645 struct scsi_host_template *sht);
1646 extern int ata_pci_sff_init_one(struct pci_dev *pdev,
1647 const struct ata_port_info * const * ppi,
1648 struct scsi_host_template *sht, void *host_priv, int hflags);
1649 #endif /* CONFIG_PCI */
1650
1651 #ifdef CONFIG_ATA_BMDMA
1652
1653 extern const struct ata_port_operations ata_bmdma_port_ops;
1654
1655 #define ATA_BMDMA_SHT(drv_name) \
1656 ATA_BASE_SHT(drv_name), \
1657 .sg_tablesize = LIBATA_MAX_PRD, \
1658 .dma_boundary = ATA_DMA_BOUNDARY
1659
1660 extern void ata_bmdma_qc_prep(struct ata_queued_cmd *qc);
1661 extern unsigned int ata_bmdma_qc_issue(struct ata_queued_cmd *qc);
1662 extern void ata_bmdma_dumb_qc_prep(struct ata_queued_cmd *qc);
1663 extern unsigned int ata_bmdma_port_intr(struct ata_port *ap,
1664 struct ata_queued_cmd *qc);
1665 extern irqreturn_t ata_bmdma_interrupt(int irq, void *dev_instance);
1666 extern void ata_bmdma_error_handler(struct ata_port *ap);
1667 extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc);
1668 extern void ata_bmdma_irq_clear(struct ata_port *ap);
1669 extern void ata_bmdma_setup(struct ata_queued_cmd *qc);
1670 extern void ata_bmdma_start(struct ata_queued_cmd *qc);
1671 extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
1672 extern u8 ata_bmdma_status(struct ata_port *ap);
1673 extern int ata_bmdma_port_start(struct ata_port *ap);
1674 extern int ata_bmdma_port_start32(struct ata_port *ap);
1675
1676 #ifdef CONFIG_PCI
1677 extern int ata_pci_bmdma_clear_simplex(struct pci_dev *pdev);
1678 extern void ata_pci_bmdma_init(struct ata_host *host);
1679 extern int ata_pci_bmdma_prepare_host(struct pci_dev *pdev,
1680 const struct ata_port_info * const * ppi,
1681 struct ata_host **r_host);
1682 extern int ata_pci_bmdma_init_one(struct pci_dev *pdev,
1683 const struct ata_port_info * const * ppi,
1684 struct scsi_host_template *sht,
1685 void *host_priv, int hflags);
1686 #endif /* CONFIG_PCI */
1687 #endif /* CONFIG_ATA_BMDMA */
1688
1689 /**
1690 * ata_sff_busy_wait - Wait for a port status register
1691 * @ap: Port to wait for.
1692 * @bits: bits that must be clear
1693 * @max: number of 10uS waits to perform
1694 *
1695 * Waits up to max*10 microseconds for the selected bits in the port's
1696 * status register to be cleared.
1697 * Returns final value of status register.
1698 *
1699 * LOCKING:
1700 * Inherited from caller.
1701 */
1702 static inline u8 ata_sff_busy_wait(struct ata_port *ap, unsigned int bits,
1703 unsigned int max)
1704 {
1705 u8 status;
1706
1707 do {
1708 udelay(10);
1709 status = ap->ops->sff_check_status(ap);
1710 max--;
1711 } while (status != 0xff && (status & bits) && (max > 0));
1712
1713 return status;
1714 }
1715
1716 /**
1717 * ata_wait_idle - Wait for a port to be idle.
1718 * @ap: Port to wait for.
1719 *
1720 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
1721 * Returns final value of status register.
1722 *
1723 * LOCKING:
1724 * Inherited from caller.
1725 */
1726 static inline u8 ata_wait_idle(struct ata_port *ap)
1727 {
1728 u8 status = ata_sff_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
1729
1730 #ifdef ATA_DEBUG
1731 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ)))
1732 ata_port_printk(ap, KERN_DEBUG, "abnormal Status 0x%X\n",
1733 status);
1734 #endif
1735
1736 return status;
1737 }
1738 #endif /* CONFIG_ATA_SFF */
1739
1740 #endif /* __LINUX_LIBATA_H__ */
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