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[libata] Fix section mismatch: ata_sff_exit
[deliverable/linux.git] / include / linux / libata.h
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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
79enum {
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
99static 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
111enum {
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_UNLOCK_HPA = (1 << 18), /* unlock HPA */
150 ATA_DFLAG_INIT_MASK = (1 << 24) - 1,
151
152 ATA_DFLAG_DETACH = (1 << 24),
153 ATA_DFLAG_DETACHED = (1 << 25),
154
155 ATA_DEV_UNKNOWN = 0, /* unknown device */
156 ATA_DEV_ATA = 1, /* ATA device */
157 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */
158 ATA_DEV_ATAPI = 3, /* ATAPI device */
159 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */
160 ATA_DEV_PMP = 5, /* SATA port multiplier */
161 ATA_DEV_PMP_UNSUP = 6, /* SATA port multiplier (unsupported) */
162 ATA_DEV_SEMB = 7, /* SEMB */
163 ATA_DEV_SEMB_UNSUP = 8, /* SEMB (unsupported) */
164 ATA_DEV_NONE = 9, /* no device */
165
166 /* struct ata_link flags */
167 ATA_LFLAG_NO_HRST = (1 << 1), /* avoid hardreset */
168 ATA_LFLAG_NO_SRST = (1 << 2), /* avoid softreset */
169 ATA_LFLAG_ASSUME_ATA = (1 << 3), /* assume ATA class */
170 ATA_LFLAG_ASSUME_SEMB = (1 << 4), /* assume SEMB class */
171 ATA_LFLAG_ASSUME_CLASS = ATA_LFLAG_ASSUME_ATA | ATA_LFLAG_ASSUME_SEMB,
172 ATA_LFLAG_NO_RETRY = (1 << 5), /* don't retry this link */
173 ATA_LFLAG_DISABLED = (1 << 6), /* link is disabled */
174 ATA_LFLAG_SW_ACTIVITY = (1 << 7), /* keep activity stats */
175
176 /* struct ata_port flags */
177 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */
178 /* (doesn't imply presence) */
179 ATA_FLAG_SATA = (1 << 1),
180 ATA_FLAG_NO_LEGACY = (1 << 2), /* no legacy mode check */
181 ATA_FLAG_MMIO = (1 << 3), /* use MMIO, not PIO */
182 ATA_FLAG_SRST = (1 << 4), /* (obsolete) use ATA SRST, not E.D.D. */
183 ATA_FLAG_SATA_RESET = (1 << 5), /* (obsolete) use COMRESET */
184 ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */
185 ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */
186 ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */
187 ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD
188 * doesn't handle PIO interrupts */
189 ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */
190 ATA_FLAG_NO_POWEROFF_SPINDOWN = (1 << 11), /* don't spindown before poweroff */
191 ATA_FLAG_NO_HIBERNATE_SPINDOWN = (1 << 12), /* don't spindown before hibernation */
192 ATA_FLAG_DEBUGMSG = (1 << 13),
193 ATA_FLAG_FPDMA_AA = (1 << 14), /* driver supports Auto-Activate */
194 ATA_FLAG_IGN_SIMPLEX = (1 << 15), /* ignore SIMPLEX */
195 ATA_FLAG_NO_IORDY = (1 << 16), /* controller lacks iordy */
196 ATA_FLAG_ACPI_SATA = (1 << 17), /* need native SATA ACPI layout */
197 ATA_FLAG_AN = (1 << 18), /* controller supports AN */
198 ATA_FLAG_PMP = (1 << 19), /* controller supports PMP */
199 ATA_FLAG_IPM = (1 << 20), /* driver can handle IPM */
200 ATA_FLAG_EM = (1 << 21), /* driver supports enclosure
201 * management */
202 ATA_FLAG_SW_ACTIVITY = (1 << 22), /* driver supports sw activity
203 * led */
204
205 /* bits 24:31 of ap->flags are reserved for LLD specific flags */
206
207
208 /* struct ata_port pflags */
209 ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */
210 ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */
211 ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */
212 ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */
213 ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */
214 ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */
215 ATA_PFLAG_INITIALIZING = (1 << 7), /* being initialized, don't touch */
216 ATA_PFLAG_RESETTING = (1 << 8), /* reset in progress */
217 ATA_PFLAG_UNLOADING = (1 << 9), /* driver is being unloaded */
218 ATA_PFLAG_UNLOADED = (1 << 10), /* driver is unloaded */
219
220 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */
221 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */
222 ATA_PFLAG_INIT_GTM_VALID = (1 << 19), /* initial gtm data valid */
223
224 ATA_PFLAG_PIO32 = (1 << 20), /* 32bit PIO */
225 ATA_PFLAG_PIO32CHANGE = (1 << 21), /* 32bit PIO can be turned on/off */
226
227 /* struct ata_queued_cmd flags */
228 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */
229 ATA_QCFLAG_DMAMAP = (1 << 1), /* SG table is DMA mapped */
230 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */
231 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */
232 ATA_QCFLAG_CLEAR_EXCL = (1 << 5), /* clear excl_link on completion */
233 ATA_QCFLAG_QUIET = (1 << 6), /* don't report device error */
234 ATA_QCFLAG_RETRY = (1 << 7), /* retry after failure */
235
236 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */
237 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */
238 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */
239
240 /* host set flags */
241 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */
242 ATA_HOST_STARTED = (1 << 1), /* Host started */
243 ATA_HOST_PARALLEL_SCAN = (1 << 2), /* Ports on this host can be scanned in parallel */
244
245 /* bits 24:31 of host->flags are reserved for LLD specific flags */
246
247 /* various lengths of time */
248 ATA_TMOUT_BOOT = 30000, /* heuristic */
249 ATA_TMOUT_BOOT_QUICK = 7000, /* heuristic */
250 ATA_TMOUT_INTERNAL_QUICK = 5000,
251 ATA_TMOUT_MAX_PARK = 30000,
252
253 /*
254 * GoVault needs 2s and iVDR disk HHD424020F7SV00 800ms. 2s
255 * is too much without parallel probing. Use 2s if parallel
256 * probing is available, 800ms otherwise.
257 */
258 ATA_TMOUT_FF_WAIT_LONG = 2000,
259 ATA_TMOUT_FF_WAIT = 800,
260
261 /* Spec mandates to wait for ">= 2ms" before checking status
262 * after reset. We wait 150ms, because that was the magic
263 * delay used for ATAPI devices in Hale Landis's ATADRVR, for
264 * the period of time between when the ATA command register is
265 * written, and then status is checked. Because waiting for
266 * "a while" before checking status is fine, post SRST, we
267 * perform this magic delay here as well.
268 *
269 * Old drivers/ide uses the 2mS rule and then waits for ready.
270 */
271 ATA_WAIT_AFTER_RESET = 150,
272
273 /* If PMP is supported, we have to do follow-up SRST. As some
274 * PMPs don't send D2H Reg FIS after hardreset, LLDs are
275 * advised to wait only for the following duration before
276 * doing SRST.
277 */
278 ATA_TMOUT_PMP_SRST_WAIT = 5000,
279
280 /* ATA bus states */
281 BUS_UNKNOWN = 0,
282 BUS_DMA = 1,
283 BUS_IDLE = 2,
284 BUS_NOINTR = 3,
285 BUS_NODATA = 4,
286 BUS_TIMER = 5,
287 BUS_PIO = 6,
288 BUS_EDD = 7,
289 BUS_IDENTIFY = 8,
290 BUS_PACKET = 9,
291
292 /* SATA port states */
293 PORT_UNKNOWN = 0,
294 PORT_ENABLED = 1,
295 PORT_DISABLED = 2,
296
297 /* encoding various smaller bitmaps into a single
298 * unsigned long bitmap
299 */
300 ATA_NR_PIO_MODES = 7,
301 ATA_NR_MWDMA_MODES = 5,
302 ATA_NR_UDMA_MODES = 8,
303
304 ATA_SHIFT_PIO = 0,
305 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_NR_PIO_MODES,
306 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_NR_MWDMA_MODES,
307
308 /* size of buffer to pad xfers ending on unaligned boundaries */
309 ATA_DMA_PAD_SZ = 4,
310
311 /* ering size */
312 ATA_ERING_SIZE = 32,
313
314 /* return values for ->qc_defer */
315 ATA_DEFER_LINK = 1,
316 ATA_DEFER_PORT = 2,
317
318 /* desc_len for ata_eh_info and context */
319 ATA_EH_DESC_LEN = 80,
320
321 /* reset / recovery action types */
322 ATA_EH_REVALIDATE = (1 << 0),
323 ATA_EH_SOFTRESET = (1 << 1), /* meaningful only in ->prereset */
324 ATA_EH_HARDRESET = (1 << 2), /* meaningful only in ->prereset */
325 ATA_EH_RESET = ATA_EH_SOFTRESET | ATA_EH_HARDRESET,
326 ATA_EH_ENABLE_LINK = (1 << 3),
327 ATA_EH_LPM = (1 << 4), /* link power management action */
328 ATA_EH_PARK = (1 << 5), /* unload heads and stop I/O */
329
330 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE | ATA_EH_PARK,
331 ATA_EH_ALL_ACTIONS = ATA_EH_REVALIDATE | ATA_EH_RESET |
332 ATA_EH_ENABLE_LINK | ATA_EH_LPM,
333
334 /* ata_eh_info->flags */
335 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */
336 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */
337 ATA_EHI_QUIET = (1 << 3), /* be quiet */
338 ATA_EHI_NO_RECOVERY = (1 << 4), /* no recovery */
339
340 ATA_EHI_DID_SOFTRESET = (1 << 16), /* already soft-reset this port */
341 ATA_EHI_DID_HARDRESET = (1 << 17), /* already soft-reset this port */
342 ATA_EHI_PRINTINFO = (1 << 18), /* print configuration info */
343 ATA_EHI_SETMODE = (1 << 19), /* configure transfer mode */
344 ATA_EHI_POST_SETMODE = (1 << 20), /* revaildating after setmode */
345
346 ATA_EHI_DID_RESET = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET,
347
348 /* mask of flags to transfer *to* the slave link */
349 ATA_EHI_TO_SLAVE_MASK = ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET,
350
351 /* max tries if error condition is still set after ->error_handler */
352 ATA_EH_MAX_TRIES = 5,
353
354 /* sometimes resuming a link requires several retries */
355 ATA_LINK_RESUME_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 ATA_HORKAGE_DUMP_ID = (1 << 16), /* dump IDENTIFY data */
391
392 /* DMA mask for user DMA control: User visible values; DO NOT
393 renumber */
394 ATA_DMA_MASK_ATA = (1 << 0), /* DMA on ATA Disk */
395 ATA_DMA_MASK_ATAPI = (1 << 1), /* DMA on ATAPI */
396 ATA_DMA_MASK_CFA = (1 << 2), /* DMA on CF Card */
397
398 /* ATAPI command types */
399 ATAPI_READ = 0, /* READs */
400 ATAPI_WRITE = 1, /* WRITEs */
401 ATAPI_READ_CD = 2, /* READ CD [MSF] */
402 ATAPI_PASS_THRU = 3, /* SAT pass-thru */
403 ATAPI_MISC = 4, /* the rest */
404
405 /* Timing constants */
406 ATA_TIMING_SETUP = (1 << 0),
407 ATA_TIMING_ACT8B = (1 << 1),
408 ATA_TIMING_REC8B = (1 << 2),
409 ATA_TIMING_CYC8B = (1 << 3),
410 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
411 ATA_TIMING_CYC8B,
412 ATA_TIMING_ACTIVE = (1 << 4),
413 ATA_TIMING_RECOVER = (1 << 5),
414 ATA_TIMING_DMACK_HOLD = (1 << 6),
415 ATA_TIMING_CYCLE = (1 << 7),
416 ATA_TIMING_UDMA = (1 << 8),
417 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
418 ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
419 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
420 ATA_TIMING_DMACK_HOLD | ATA_TIMING_CYCLE |
421 ATA_TIMING_UDMA,
422
423 /* ACPI constants */
424 ATA_ACPI_FILTER_SETXFER = 1 << 0,
425 ATA_ACPI_FILTER_LOCK = 1 << 1,
426 ATA_ACPI_FILTER_DIPM = 1 << 2,
427 ATA_ACPI_FILTER_FPDMA_OFFSET = 1 << 3, /* FPDMA non-zero offset */
428 ATA_ACPI_FILTER_FPDMA_AA = 1 << 4, /* FPDMA auto activate */
429
430 ATA_ACPI_FILTER_DEFAULT = ATA_ACPI_FILTER_SETXFER |
431 ATA_ACPI_FILTER_LOCK |
432 ATA_ACPI_FILTER_DIPM,
433};
434
435enum ata_xfer_mask {
436 ATA_MASK_PIO = ((1LU << ATA_NR_PIO_MODES) - 1)
437 << ATA_SHIFT_PIO,
438 ATA_MASK_MWDMA = ((1LU << ATA_NR_MWDMA_MODES) - 1)
439 << ATA_SHIFT_MWDMA,
440 ATA_MASK_UDMA = ((1LU << ATA_NR_UDMA_MODES) - 1)
441 << ATA_SHIFT_UDMA,
442};
443
444enum hsm_task_states {
445 HSM_ST_IDLE, /* no command on going */
446 HSM_ST_FIRST, /* (waiting the device to)
447 write CDB or first data block */
448 HSM_ST, /* (waiting the device to) transfer data */
449 HSM_ST_LAST, /* (waiting the device to) complete command */
450 HSM_ST_ERR, /* error */
451};
452
453enum ata_completion_errors {
454 AC_ERR_DEV = (1 << 0), /* device reported error */
455 AC_ERR_HSM = (1 << 1), /* host state machine violation */
456 AC_ERR_TIMEOUT = (1 << 2), /* timeout */
457 AC_ERR_MEDIA = (1 << 3), /* media error */
458 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */
459 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */
460 AC_ERR_SYSTEM = (1 << 6), /* system error */
461 AC_ERR_INVALID = (1 << 7), /* invalid argument */
462 AC_ERR_OTHER = (1 << 8), /* unknown */
463 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */
464 AC_ERR_NCQ = (1 << 10), /* marker for offending NCQ qc */
465};
466
467/* forward declarations */
468struct scsi_device;
469struct ata_port_operations;
470struct ata_port;
471struct ata_link;
472struct ata_queued_cmd;
473
474/* typedefs */
475typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
476typedef int (*ata_prereset_fn_t)(struct ata_link *link, unsigned long deadline);
477typedef int (*ata_reset_fn_t)(struct ata_link *link, unsigned int *classes,
478 unsigned long deadline);
479typedef void (*ata_postreset_fn_t)(struct ata_link *link, unsigned int *classes);
480
481/*
482 * host pm policy: If you alter this, you also need to alter libata-scsi.c
483 * (for the ascii descriptions)
484 */
485enum link_pm {
486 NOT_AVAILABLE,
487 MIN_POWER,
488 MAX_PERFORMANCE,
489 MEDIUM_POWER,
490};
491extern struct device_attribute dev_attr_link_power_management_policy;
492extern struct device_attribute dev_attr_unload_heads;
493extern struct device_attribute dev_attr_em_message_type;
494extern struct device_attribute dev_attr_em_message;
495extern struct device_attribute dev_attr_sw_activity;
496
497enum sw_activity {
498 OFF,
499 BLINK_ON,
500 BLINK_OFF,
501};
502
503#ifdef CONFIG_ATA_SFF
504struct ata_ioports {
505 void __iomem *cmd_addr;
506 void __iomem *data_addr;
507 void __iomem *error_addr;
508 void __iomem *feature_addr;
509 void __iomem *nsect_addr;
510 void __iomem *lbal_addr;
511 void __iomem *lbam_addr;
512 void __iomem *lbah_addr;
513 void __iomem *device_addr;
514 void __iomem *status_addr;
515 void __iomem *command_addr;
516 void __iomem *altstatus_addr;
517 void __iomem *ctl_addr;
518#ifdef CONFIG_ATA_BMDMA
519 void __iomem *bmdma_addr;
520#endif /* CONFIG_ATA_BMDMA */
521 void __iomem *scr_addr;
522};
523#endif /* CONFIG_ATA_SFF */
524
525struct ata_host {
526 spinlock_t lock;
527 struct device *dev;
528 void __iomem * const *iomap;
529 unsigned int n_ports;
530 void *private_data;
531 struct ata_port_operations *ops;
532 unsigned long flags;
533#ifdef CONFIG_ATA_ACPI
534 acpi_handle acpi_handle;
535#endif
536 struct ata_port *simplex_claimed; /* channel owning the DMA */
537 struct ata_port *ports[0];
538};
539
540struct ata_queued_cmd {
541 struct ata_port *ap;
542 struct ata_device *dev;
543
544 struct scsi_cmnd *scsicmd;
545 void (*scsidone)(struct scsi_cmnd *);
546
547 struct ata_taskfile tf;
548 u8 cdb[ATAPI_CDB_LEN];
549
550 unsigned long flags; /* ATA_QCFLAG_xxx */
551 unsigned int tag;
552 unsigned int n_elem;
553 unsigned int orig_n_elem;
554
555 int dma_dir;
556
557 unsigned int sect_size;
558
559 unsigned int nbytes;
560 unsigned int extrabytes;
561 unsigned int curbytes;
562
563 struct scatterlist *cursg;
564 unsigned int cursg_ofs;
565
566 struct scatterlist sgent;
567
568 struct scatterlist *sg;
569
570 unsigned int err_mask;
571 struct ata_taskfile result_tf;
572 ata_qc_cb_t complete_fn;
573
574 void *private_data;
575 void *lldd_task;
576};
577
578struct ata_port_stats {
579 unsigned long unhandled_irq;
580 unsigned long idle_irq;
581 unsigned long rw_reqbuf;
582};
583
584struct ata_ering_entry {
585 unsigned int eflags;
586 unsigned int err_mask;
587 u64 timestamp;
588};
589
590struct ata_ering {
591 int cursor;
592 struct ata_ering_entry ring[ATA_ERING_SIZE];
593};
594
595struct ata_device {
596 struct ata_link *link;
597 unsigned int devno; /* 0 or 1 */
598 unsigned int horkage; /* List of broken features */
599 unsigned long flags; /* ATA_DFLAG_xxx */
600 struct scsi_device *sdev; /* attached SCSI device */
601 void *private_data;
602#ifdef CONFIG_ATA_ACPI
603 acpi_handle acpi_handle;
604 union acpi_object *gtf_cache;
605 unsigned int gtf_filter;
606#endif
607 struct device tdev;
608 /* n_sector is CLEAR_BEGIN, read comment above CLEAR_BEGIN */
609 u64 n_sectors; /* size of device, if ATA */
610 u64 n_native_sectors; /* native size, if ATA */
611 unsigned int class; /* ATA_DEV_xxx */
612 unsigned long unpark_deadline;
613
614 u8 pio_mode;
615 u8 dma_mode;
616 u8 xfer_mode;
617 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
618
619 unsigned int multi_count; /* sectors count for
620 READ/WRITE MULTIPLE */
621 unsigned int max_sectors; /* per-device max sectors */
622 unsigned int cdb_len;
623
624 /* per-dev xfer mask */
625 unsigned long pio_mask;
626 unsigned long mwdma_mask;
627 unsigned long udma_mask;
628
629 /* for CHS addressing */
630 u16 cylinders; /* Number of cylinders */
631 u16 heads; /* Number of heads */
632 u16 sectors; /* Number of sectors per track */
633
634 union {
635 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
636 u32 gscr[SATA_PMP_GSCR_DWORDS]; /* PMP GSCR block */
637 };
638
639 /* error history */
640 int spdn_cnt;
641 /* ering is CLEAR_END, read comment above CLEAR_END */
642 struct ata_ering ering;
643};
644
645/* Fields between ATA_DEVICE_CLEAR_BEGIN and ATA_DEVICE_CLEAR_END are
646 * cleared to zero on ata_dev_init().
647 */
648#define ATA_DEVICE_CLEAR_BEGIN offsetof(struct ata_device, n_sectors)
649#define ATA_DEVICE_CLEAR_END offsetof(struct ata_device, ering)
650
651struct ata_eh_info {
652 struct ata_device *dev; /* offending device */
653 u32 serror; /* SError from LLDD */
654 unsigned int err_mask; /* port-wide err_mask */
655 unsigned int action; /* ATA_EH_* action mask */
656 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */
657 unsigned int flags; /* ATA_EHI_* flags */
658
659 unsigned int probe_mask;
660
661 char desc[ATA_EH_DESC_LEN];
662 int desc_len;
663};
664
665struct ata_eh_context {
666 struct ata_eh_info i;
667 int tries[ATA_MAX_DEVICES];
668 int cmd_timeout_idx[ATA_MAX_DEVICES]
669 [ATA_EH_CMD_TIMEOUT_TABLE_SIZE];
670 unsigned int classes[ATA_MAX_DEVICES];
671 unsigned int did_probe_mask;
672 unsigned int unloaded_mask;
673 unsigned int saved_ncq_enabled;
674 u8 saved_xfer_mode[ATA_MAX_DEVICES];
675 /* timestamp for the last reset attempt or success */
676 unsigned long last_reset;
677};
678
679struct ata_acpi_drive
680{
681 u32 pio;
682 u32 dma;
683} __packed;
684
685struct ata_acpi_gtm {
686 struct ata_acpi_drive drive[2];
687 u32 flags;
688} __packed;
689
690struct ata_link {
691 struct ata_port *ap;
692 int pmp; /* port multiplier port # */
693
694 struct device tdev;
695 unsigned int active_tag; /* active tag on this link */
696 u32 sactive; /* active NCQ commands */
697
698 unsigned int flags; /* ATA_LFLAG_xxx */
699
700 u32 saved_scontrol; /* SControl on probe */
701 unsigned int hw_sata_spd_limit;
702 unsigned int sata_spd_limit;
703 unsigned int sata_spd; /* current SATA PHY speed */
704
705 /* record runtime error info, protected by host_set lock */
706 struct ata_eh_info eh_info;
707 /* EH context */
708 struct ata_eh_context eh_context;
709
710 struct ata_device device[ATA_MAX_DEVICES];
711};
712#define ATA_LINK_CLEAR_BEGIN offsetof(struct ata_link, active_tag)
713#define ATA_LINK_CLEAR_END offsetof(struct ata_link, device[0])
714
715struct ata_port {
716 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */
717 struct ata_port_operations *ops;
718 spinlock_t *lock;
719 /* Flags owned by the EH context. Only EH should touch these once the
720 port is active */
721 unsigned long flags; /* ATA_FLAG_xxx */
722 /* Flags that change dynamically, protected by ap->lock */
723 unsigned int pflags; /* ATA_PFLAG_xxx */
724 unsigned int print_id; /* user visible unique port ID */
725 unsigned int port_no; /* 0 based port no. inside the host */
726
727#ifdef CONFIG_ATA_SFF
728 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
729 u8 ctl; /* cache of ATA control register */
730 u8 last_ctl; /* Cache last written value */
731 struct ata_link* sff_pio_task_link; /* link currently used */
732 struct delayed_work sff_pio_task;
733#ifdef CONFIG_ATA_BMDMA
734 struct ata_bmdma_prd *bmdma_prd; /* BMDMA SG list */
735 dma_addr_t bmdma_prd_dma; /* and its DMA mapping */
736#endif /* CONFIG_ATA_BMDMA */
737#endif /* CONFIG_ATA_SFF */
738
739 unsigned int pio_mask;
740 unsigned int mwdma_mask;
741 unsigned int udma_mask;
742 unsigned int cbl; /* cable type; ATA_CBL_xxx */
743
744 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
745 unsigned long qc_allocated;
746 unsigned int qc_active;
747 int nr_active_links; /* #links with active qcs */
748
749 struct ata_link link; /* host default link */
750 struct ata_link *slave_link; /* see ata_slave_link_init() */
751
752 int nr_pmp_links; /* nr of available PMP links */
753 struct ata_link *pmp_link; /* array of PMP links */
754 struct ata_link *excl_link; /* for PMP qc exclusion */
755
756 struct ata_port_stats stats;
757 struct ata_host *host;
758 struct device *dev;
759 struct device tdev;
760
761 struct mutex scsi_scan_mutex;
762 struct delayed_work hotplug_task;
763 struct work_struct scsi_rescan_task;
764
765 unsigned int hsm_task_state;
766
767 u32 msg_enable;
768 struct list_head eh_done_q;
769 wait_queue_head_t eh_wait_q;
770 int eh_tries;
771 struct completion park_req_pending;
772
773 pm_message_t pm_mesg;
774 int *pm_result;
775 enum link_pm pm_policy;
776
777 struct timer_list fastdrain_timer;
778 unsigned long fastdrain_cnt;
779
780 int em_message_type;
781 void *private_data;
782
783#ifdef CONFIG_ATA_ACPI
784 acpi_handle acpi_handle;
785 struct ata_acpi_gtm __acpi_init_gtm; /* use ata_acpi_init_gtm() */
786#endif
787 /* owned by EH */
788 u8 sector_buf[ATA_SECT_SIZE] ____cacheline_aligned;
789};
790
791/* The following initializer overrides a method to NULL whether one of
792 * its parent has the method defined or not. This is equivalent to
793 * ERR_PTR(-ENOENT). Unfortunately, ERR_PTR doesn't render a constant
794 * expression and thus can't be used as an initializer.
795 */
796#define ATA_OP_NULL (void *)(unsigned long)(-ENOENT)
797
798struct ata_port_operations {
799 /*
800 * Command execution
801 */
802 int (*qc_defer)(struct ata_queued_cmd *qc);
803 int (*check_atapi_dma)(struct ata_queued_cmd *qc);
804 void (*qc_prep)(struct ata_queued_cmd *qc);
805 unsigned int (*qc_issue)(struct ata_queued_cmd *qc);
806 bool (*qc_fill_rtf)(struct ata_queued_cmd *qc);
807
808 /*
809 * Configuration and exception handling
810 */
811 int (*cable_detect)(struct ata_port *ap);
812 unsigned long (*mode_filter)(struct ata_device *dev, unsigned long xfer_mask);
813 void (*set_piomode)(struct ata_port *ap, struct ata_device *dev);
814 void (*set_dmamode)(struct ata_port *ap, struct ata_device *dev);
815 int (*set_mode)(struct ata_link *link, struct ata_device **r_failed_dev);
816 unsigned int (*read_id)(struct ata_device *dev, struct ata_taskfile *tf, u16 *id);
817
818 void (*dev_config)(struct ata_device *dev);
819
820 void (*freeze)(struct ata_port *ap);
821 void (*thaw)(struct ata_port *ap);
822 ata_prereset_fn_t prereset;
823 ata_reset_fn_t softreset;
824 ata_reset_fn_t hardreset;
825 ata_postreset_fn_t postreset;
826 ata_prereset_fn_t pmp_prereset;
827 ata_reset_fn_t pmp_softreset;
828 ata_reset_fn_t pmp_hardreset;
829 ata_postreset_fn_t pmp_postreset;
830 void (*error_handler)(struct ata_port *ap);
831 void (*lost_interrupt)(struct ata_port *ap);
832 void (*post_internal_cmd)(struct ata_queued_cmd *qc);
833
834 /*
835 * Optional features
836 */
837 int (*scr_read)(struct ata_link *link, unsigned int sc_reg, u32 *val);
838 int (*scr_write)(struct ata_link *link, unsigned int sc_reg, u32 val);
839 void (*pmp_attach)(struct ata_port *ap);
840 void (*pmp_detach)(struct ata_port *ap);
841 int (*enable_pm)(struct ata_port *ap, enum link_pm policy);
842 void (*disable_pm)(struct ata_port *ap);
843
844 /*
845 * Start, stop, suspend and resume
846 */
847 int (*port_suspend)(struct ata_port *ap, pm_message_t mesg);
848 int (*port_resume)(struct ata_port *ap);
849 int (*port_start)(struct ata_port *ap);
850 void (*port_stop)(struct ata_port *ap);
851 void (*host_stop)(struct ata_host *host);
852
853#ifdef CONFIG_ATA_SFF
854 /*
855 * SFF / taskfile oriented ops
856 */
857 void (*sff_dev_select)(struct ata_port *ap, unsigned int device);
858 void (*sff_set_devctl)(struct ata_port *ap, u8 ctl);
859 u8 (*sff_check_status)(struct ata_port *ap);
860 u8 (*sff_check_altstatus)(struct ata_port *ap);
861 void (*sff_tf_load)(struct ata_port *ap, const struct ata_taskfile *tf);
862 void (*sff_tf_read)(struct ata_port *ap, struct ata_taskfile *tf);
863 void (*sff_exec_command)(struct ata_port *ap,
864 const struct ata_taskfile *tf);
865 unsigned int (*sff_data_xfer)(struct ata_device *dev,
866 unsigned char *buf, unsigned int buflen, int rw);
867 void (*sff_irq_on)(struct ata_port *);
868 bool (*sff_irq_check)(struct ata_port *);
869 void (*sff_irq_clear)(struct ata_port *);
870 void (*sff_drain_fifo)(struct ata_queued_cmd *qc);
871
872#ifdef CONFIG_ATA_BMDMA
873 void (*bmdma_setup)(struct ata_queued_cmd *qc);
874 void (*bmdma_start)(struct ata_queued_cmd *qc);
875 void (*bmdma_stop)(struct ata_queued_cmd *qc);
876 u8 (*bmdma_status)(struct ata_port *ap);
877#endif /* CONFIG_ATA_BMDMA */
878#endif /* CONFIG_ATA_SFF */
879
880 ssize_t (*em_show)(struct ata_port *ap, char *buf);
881 ssize_t (*em_store)(struct ata_port *ap, const char *message,
882 size_t size);
883 ssize_t (*sw_activity_show)(struct ata_device *dev, char *buf);
884 ssize_t (*sw_activity_store)(struct ata_device *dev,
885 enum sw_activity val);
886 /*
887 * Obsolete
888 */
889 void (*phy_reset)(struct ata_port *ap);
890 void (*eng_timeout)(struct ata_port *ap);
891
892 /*
893 * ->inherits must be the last field and all the preceding
894 * fields must be pointers.
895 */
896 const struct ata_port_operations *inherits;
897};
898
899struct ata_port_info {
900 unsigned long flags;
901 unsigned long link_flags;
902 unsigned long pio_mask;
903 unsigned long mwdma_mask;
904 unsigned long udma_mask;
905 struct ata_port_operations *port_ops;
906 void *private_data;
907};
908
909struct ata_timing {
910 unsigned short mode; /* ATA mode */
911 unsigned short setup; /* t1 */
912 unsigned short act8b; /* t2 for 8-bit I/O */
913 unsigned short rec8b; /* t2i for 8-bit I/O */
914 unsigned short cyc8b; /* t0 for 8-bit I/O */
915 unsigned short active; /* t2 or tD */
916 unsigned short recover; /* t2i or tK */
917 unsigned short dmack_hold; /* tj */
918 unsigned short cycle; /* t0 */
919 unsigned short udma; /* t2CYCTYP/2 */
920};
921
922/*
923 * Core layer - drivers/ata/libata-core.c
924 */
925extern const unsigned long sata_deb_timing_normal[];
926extern const unsigned long sata_deb_timing_hotplug[];
927extern const unsigned long sata_deb_timing_long[];
928
929extern struct ata_port_operations ata_dummy_port_ops;
930extern const struct ata_port_info ata_dummy_port_info;
931
932static inline const unsigned long *
933sata_ehc_deb_timing(struct ata_eh_context *ehc)
934{
935 if (ehc->i.flags & ATA_EHI_HOTPLUGGED)
936 return sata_deb_timing_hotplug;
937 else
938 return sata_deb_timing_normal;
939}
940
941static inline int ata_port_is_dummy(struct ata_port *ap)
942{
943 return ap->ops == &ata_dummy_port_ops;
944}
945
946extern int sata_set_spd(struct ata_link *link);
947extern int ata_std_prereset(struct ata_link *link, unsigned long deadline);
948extern int ata_wait_after_reset(struct ata_link *link, unsigned long deadline,
949 int (*check_ready)(struct ata_link *link));
950extern int sata_link_debounce(struct ata_link *link,
951 const unsigned long *params, unsigned long deadline);
952extern int sata_link_resume(struct ata_link *link, const unsigned long *params,
953 unsigned long deadline);
954extern int sata_link_hardreset(struct ata_link *link,
955 const unsigned long *timing, unsigned long deadline,
956 bool *online, int (*check_ready)(struct ata_link *));
957extern int sata_std_hardreset(struct ata_link *link, unsigned int *class,
958 unsigned long deadline);
959extern void ata_std_postreset(struct ata_link *link, unsigned int *classes);
960
961extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports);
962extern struct ata_host *ata_host_alloc_pinfo(struct device *dev,
963 const struct ata_port_info * const * ppi, int n_ports);
964extern int ata_slave_link_init(struct ata_port *ap);
965extern int ata_host_start(struct ata_host *host);
966extern int ata_host_register(struct ata_host *host,
967 struct scsi_host_template *sht);
968extern int ata_host_activate(struct ata_host *host, int irq,
969 irq_handler_t irq_handler, unsigned long irq_flags,
970 struct scsi_host_template *sht);
971extern void ata_host_detach(struct ata_host *host);
972extern void ata_host_init(struct ata_host *, struct device *,
973 unsigned long, struct ata_port_operations *);
974extern int ata_scsi_detect(struct scsi_host_template *sht);
975extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
976extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *));
977extern int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *dev,
978 int cmd, void __user *arg);
979extern void ata_sas_port_destroy(struct ata_port *);
980extern struct ata_port *ata_sas_port_alloc(struct ata_host *,
981 struct ata_port_info *, struct Scsi_Host *);
982extern int ata_sas_port_init(struct ata_port *);
983extern int ata_sas_port_start(struct ata_port *ap);
984extern void ata_sas_port_stop(struct ata_port *ap);
985extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *);
986extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
987 struct ata_port *ap);
988extern int sata_scr_valid(struct ata_link *link);
989extern int sata_scr_read(struct ata_link *link, int reg, u32 *val);
990extern int sata_scr_write(struct ata_link *link, int reg, u32 val);
991extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val);
992extern bool ata_link_online(struct ata_link *link);
993extern bool ata_link_offline(struct ata_link *link);
994#ifdef CONFIG_PM
995extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg);
996extern void ata_host_resume(struct ata_host *host);
997#endif
998extern int ata_ratelimit(void);
999extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
1000 unsigned long interval, unsigned long timeout);
1001extern int atapi_cmd_type(u8 opcode);
1002extern void ata_tf_to_fis(const struct ata_taskfile *tf,
1003 u8 pmp, int is_cmd, u8 *fis);
1004extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
1005extern unsigned long ata_pack_xfermask(unsigned long pio_mask,
1006 unsigned long mwdma_mask, unsigned long udma_mask);
1007extern void ata_unpack_xfermask(unsigned long xfer_mask,
1008 unsigned long *pio_mask, unsigned long *mwdma_mask,
1009 unsigned long *udma_mask);
1010extern u8 ata_xfer_mask2mode(unsigned long xfer_mask);
1011extern unsigned long ata_xfer_mode2mask(u8 xfer_mode);
1012extern int ata_xfer_mode2shift(unsigned long xfer_mode);
1013extern const char *ata_mode_string(unsigned long xfer_mask);
1014extern unsigned long ata_id_xfermask(const u16 *id);
1015extern int ata_std_qc_defer(struct ata_queued_cmd *qc);
1016extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
1017extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
1018 unsigned int n_elem);
1019extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
1020extern void ata_dev_disable(struct ata_device *adev);
1021extern void ata_id_string(const u16 *id, unsigned char *s,
1022 unsigned int ofs, unsigned int len);
1023extern void ata_id_c_string(const u16 *id, unsigned char *s,
1024 unsigned int ofs, unsigned int len);
1025extern unsigned int ata_do_dev_read_id(struct ata_device *dev,
1026 struct ata_taskfile *tf, u16 *id);
1027extern void ata_qc_complete(struct ata_queued_cmd *qc);
1028extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active);
1029extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
1030 void (*done)(struct scsi_cmnd *));
1031extern int ata_std_bios_param(struct scsi_device *sdev,
1032 struct block_device *bdev,
1033 sector_t capacity, int geom[]);
1034extern void ata_scsi_unlock_native_capacity(struct scsi_device *sdev);
1035extern int ata_scsi_slave_config(struct scsi_device *sdev);
1036extern void ata_scsi_slave_destroy(struct scsi_device *sdev);
1037extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
1038 int queue_depth, int reason);
1039extern struct ata_device *ata_dev_pair(struct ata_device *adev);
1040extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev);
1041
1042extern int ata_cable_40wire(struct ata_port *ap);
1043extern int ata_cable_80wire(struct ata_port *ap);
1044extern int ata_cable_sata(struct ata_port *ap);
1045extern int ata_cable_ignore(struct ata_port *ap);
1046extern int ata_cable_unknown(struct ata_port *ap);
1047
1048/* Timing helpers */
1049extern unsigned int ata_pio_need_iordy(const struct ata_device *);
1050extern const struct ata_timing *ata_timing_find_mode(u8 xfer_mode);
1051extern int ata_timing_compute(struct ata_device *, unsigned short,
1052 struct ata_timing *, int, int);
1053extern void ata_timing_merge(const struct ata_timing *,
1054 const struct ata_timing *, struct ata_timing *,
1055 unsigned int);
1056extern u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle);
1057
1058/* PCI */
1059#ifdef CONFIG_PCI
1060struct pci_dev;
1061
1062struct pci_bits {
1063 unsigned int reg; /* PCI config register to read */
1064 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
1065 unsigned long mask;
1066 unsigned long val;
1067};
1068
1069extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
1070extern void ata_pci_remove_one(struct pci_dev *pdev);
1071
1072#ifdef CONFIG_PM
1073extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg);
1074extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev);
1075extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
1076extern int ata_pci_device_resume(struct pci_dev *pdev);
1077#endif /* CONFIG_PM */
1078#endif /* CONFIG_PCI */
1079
1080/*
1081 * ACPI - drivers/ata/libata-acpi.c
1082 */
1083#ifdef CONFIG_ATA_ACPI
1084static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
1085{
1086 if (ap->pflags & ATA_PFLAG_INIT_GTM_VALID)
1087 return &ap->__acpi_init_gtm;
1088 return NULL;
1089}
1090int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm);
1091int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *stm);
1092unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev,
1093 const struct ata_acpi_gtm *gtm);
1094int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm);
1095#else
1096static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
1097{
1098 return NULL;
1099}
1100
1101static inline int ata_acpi_stm(const struct ata_port *ap,
1102 struct ata_acpi_gtm *stm)
1103{
1104 return -ENOSYS;
1105}
1106
1107static inline int ata_acpi_gtm(const struct ata_port *ap,
1108 struct ata_acpi_gtm *stm)
1109{
1110 return -ENOSYS;
1111}
1112
1113static inline unsigned int ata_acpi_gtm_xfermask(struct ata_device *dev,
1114 const struct ata_acpi_gtm *gtm)
1115{
1116 return 0;
1117}
1118
1119static inline int ata_acpi_cbl_80wire(struct ata_port *ap,
1120 const struct ata_acpi_gtm *gtm)
1121{
1122 return 0;
1123}
1124#endif
1125
1126/*
1127 * EH - drivers/ata/libata-eh.c
1128 */
1129extern void ata_port_schedule_eh(struct ata_port *ap);
1130extern int ata_link_abort(struct ata_link *link);
1131extern int ata_port_abort(struct ata_port *ap);
1132extern int ata_port_freeze(struct ata_port *ap);
1133extern int sata_async_notification(struct ata_port *ap);
1134
1135extern void ata_eh_freeze_port(struct ata_port *ap);
1136extern void ata_eh_thaw_port(struct ata_port *ap);
1137
1138extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
1139extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
1140extern void ata_eh_analyze_ncq_error(struct ata_link *link);
1141
1142extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
1143 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
1144 ata_postreset_fn_t postreset);
1145extern void ata_std_error_handler(struct ata_port *ap);
1146
1147/*
1148 * Base operations to inherit from and initializers for sht
1149 *
1150 * Operations
1151 *
1152 * base : Common to all libata drivers.
1153 * sata : SATA controllers w/ native interface.
1154 * pmp : SATA controllers w/ PMP support.
1155 * sff : SFF ATA controllers w/o BMDMA support.
1156 * bmdma : SFF ATA controllers w/ BMDMA support.
1157 *
1158 * sht initializers
1159 *
1160 * BASE : Common to all libata drivers. The user must set
1161 * sg_tablesize and dma_boundary.
1162 * PIO : SFF ATA controllers w/ only PIO support.
1163 * BMDMA : SFF ATA controllers w/ BMDMA support. sg_tablesize and
1164 * dma_boundary are set to BMDMA limits.
1165 * NCQ : SATA controllers supporting NCQ. The user must set
1166 * sg_tablesize, dma_boundary and can_queue.
1167 */
1168extern const struct ata_port_operations ata_base_port_ops;
1169extern const struct ata_port_operations sata_port_ops;
1170extern struct device_attribute *ata_common_sdev_attrs[];
1171
1172#define ATA_BASE_SHT(drv_name) \
1173 .module = THIS_MODULE, \
1174 .name = drv_name, \
1175 .ioctl = ata_scsi_ioctl, \
1176 .queuecommand = ata_scsi_queuecmd, \
1177 .can_queue = ATA_DEF_QUEUE, \
1178 .this_id = ATA_SHT_THIS_ID, \
1179 .cmd_per_lun = ATA_SHT_CMD_PER_LUN, \
1180 .emulated = ATA_SHT_EMULATED, \
1181 .use_clustering = ATA_SHT_USE_CLUSTERING, \
1182 .proc_name = drv_name, \
1183 .slave_configure = ata_scsi_slave_config, \
1184 .slave_destroy = ata_scsi_slave_destroy, \
1185 .bios_param = ata_std_bios_param, \
1186 .unlock_native_capacity = ata_scsi_unlock_native_capacity, \
1187 .sdev_attrs = ata_common_sdev_attrs
1188
1189#define ATA_NCQ_SHT(drv_name) \
1190 ATA_BASE_SHT(drv_name), \
1191 .change_queue_depth = ata_scsi_change_queue_depth
1192
1193/*
1194 * PMP helpers
1195 */
1196#ifdef CONFIG_SATA_PMP
1197static inline bool sata_pmp_supported(struct ata_port *ap)
1198{
1199 return ap->flags & ATA_FLAG_PMP;
1200}
1201
1202static inline bool sata_pmp_attached(struct ata_port *ap)
1203{
1204 return ap->nr_pmp_links != 0;
1205}
1206
1207static inline int ata_is_host_link(const struct ata_link *link)
1208{
1209 return link == &link->ap->link || link == link->ap->slave_link;
1210}
1211#else /* CONFIG_SATA_PMP */
1212static inline bool sata_pmp_supported(struct ata_port *ap)
1213{
1214 return false;
1215}
1216
1217static inline bool sata_pmp_attached(struct ata_port *ap)
1218{
1219 return false;
1220}
1221
1222static inline int ata_is_host_link(const struct ata_link *link)
1223{
1224 return 1;
1225}
1226#endif /* CONFIG_SATA_PMP */
1227
1228static inline int sata_srst_pmp(struct ata_link *link)
1229{
1230 if (sata_pmp_supported(link->ap) && ata_is_host_link(link))
1231 return SATA_PMP_CTRL_PORT;
1232 return link->pmp;
1233}
1234
1235/*
1236 * printk helpers
1237 */
1238#define ata_port_printk(ap, lv, fmt, args...) \
1239 printk("%sata%u: "fmt, lv, (ap)->print_id , ##args)
1240
1241#define ata_link_printk(link, lv, fmt, args...) do { \
1242 if (sata_pmp_attached((link)->ap) || (link)->ap->slave_link) \
1243 printk("%sata%u.%02u: "fmt, lv, (link)->ap->print_id, \
1244 (link)->pmp , ##args); \
1245 else \
1246 printk("%sata%u: "fmt, lv, (link)->ap->print_id , ##args); \
1247 } while(0)
1248
1249#define ata_dev_printk(dev, lv, fmt, args...) \
1250 printk("%sata%u.%02u: "fmt, lv, (dev)->link->ap->print_id, \
1251 (dev)->link->pmp + (dev)->devno , ##args)
1252
1253/*
1254 * ata_eh_info helpers
1255 */
1256extern void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...)
1257 __attribute__ ((format (printf, 2, 3)));
1258extern void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...)
1259 __attribute__ ((format (printf, 2, 3)));
1260extern void ata_ehi_clear_desc(struct ata_eh_info *ehi);
1261
1262static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
1263{
1264 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
1265 ehi->flags |= ATA_EHI_HOTPLUGGED;
1266 ehi->action |= ATA_EH_RESET | ATA_EH_ENABLE_LINK;
1267 ehi->err_mask |= AC_ERR_ATA_BUS;
1268}
1269
1270/*
1271 * port description helpers
1272 */
1273extern void ata_port_desc(struct ata_port *ap, const char *fmt, ...)
1274 __attribute__ ((format (printf, 2, 3)));
1275#ifdef CONFIG_PCI
1276extern void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset,
1277 const char *name);
1278#endif
1279
1280static inline unsigned int ata_tag_valid(unsigned int tag)
1281{
1282 return (tag < ATA_MAX_QUEUE) ? 1 : 0;
1283}
1284
1285static inline unsigned int ata_tag_internal(unsigned int tag)
1286{
1287 return tag == ATA_TAG_INTERNAL;
1288}
1289
1290/*
1291 * device helpers
1292 */
1293static inline unsigned int ata_class_enabled(unsigned int class)
1294{
1295 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI ||
1296 class == ATA_DEV_PMP || class == ATA_DEV_SEMB;
1297}
1298
1299static inline unsigned int ata_class_disabled(unsigned int class)
1300{
1301 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP ||
1302 class == ATA_DEV_PMP_UNSUP || class == ATA_DEV_SEMB_UNSUP;
1303}
1304
1305static inline unsigned int ata_class_absent(unsigned int class)
1306{
1307 return !ata_class_enabled(class) && !ata_class_disabled(class);
1308}
1309
1310static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
1311{
1312 return ata_class_enabled(dev->class);
1313}
1314
1315static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
1316{
1317 return ata_class_disabled(dev->class);
1318}
1319
1320static inline unsigned int ata_dev_absent(const struct ata_device *dev)
1321{
1322 return ata_class_absent(dev->class);
1323}
1324
1325/*
1326 * link helpers
1327 */
1328static inline int ata_link_max_devices(const struct ata_link *link)
1329{
1330 if (ata_is_host_link(link) && link->ap->flags & ATA_FLAG_SLAVE_POSS)
1331 return 2;
1332 return 1;
1333}
1334
1335static inline int ata_link_active(struct ata_link *link)
1336{
1337 return ata_tag_valid(link->active_tag) || link->sactive;
1338}
1339
1340/*
1341 * Iterators
1342 *
1343 * ATA_LITER_* constants are used to select link iteration mode and
1344 * ATA_DITER_* device iteration mode.
1345 *
1346 * For a custom iteration directly using ata_{link|dev}_next(), if
1347 * @link or @dev, respectively, is NULL, the first element is
1348 * returned. @dev and @link can be any valid device or link and the
1349 * next element according to the iteration mode will be returned.
1350 * After the last element, NULL is returned.
1351 */
1352enum ata_link_iter_mode {
1353 ATA_LITER_EDGE, /* if present, PMP links only; otherwise,
1354 * host link. no slave link */
1355 ATA_LITER_HOST_FIRST, /* host link followed by PMP or slave links */
1356 ATA_LITER_PMP_FIRST, /* PMP links followed by host link,
1357 * slave link still comes after host link */
1358};
1359
1360enum ata_dev_iter_mode {
1361 ATA_DITER_ENABLED,
1362 ATA_DITER_ENABLED_REVERSE,
1363 ATA_DITER_ALL,
1364 ATA_DITER_ALL_REVERSE,
1365};
1366
1367extern struct ata_link *ata_link_next(struct ata_link *link,
1368 struct ata_port *ap,
1369 enum ata_link_iter_mode mode);
1370
1371extern struct ata_device *ata_dev_next(struct ata_device *dev,
1372 struct ata_link *link,
1373 enum ata_dev_iter_mode mode);
1374
1375/*
1376 * Shortcut notation for iterations
1377 *
1378 * ata_for_each_link() iterates over each link of @ap according to
1379 * @mode. @link points to the current link in the loop. @link is
1380 * NULL after loop termination. ata_for_each_dev() works the same way
1381 * except that it iterates over each device of @link.
1382 *
1383 * Note that the mode prefixes ATA_{L|D}ITER_ shouldn't need to be
1384 * specified when using the following shorthand notations. Only the
1385 * mode itself (EDGE, HOST_FIRST, ENABLED, etc...) should be
1386 * specified. This not only increases brevity but also makes it
1387 * impossible to use ATA_LITER_* for device iteration or vice-versa.
1388 */
1389#define ata_for_each_link(link, ap, mode) \
1390 for ((link) = ata_link_next(NULL, (ap), ATA_LITER_##mode); (link); \
1391 (link) = ata_link_next((link), (ap), ATA_LITER_##mode))
1392
1393#define ata_for_each_dev(dev, link, mode) \
1394 for ((dev) = ata_dev_next(NULL, (link), ATA_DITER_##mode); (dev); \
1395 (dev) = ata_dev_next((dev), (link), ATA_DITER_##mode))
1396
1397/**
1398 * ata_ncq_enabled - Test whether NCQ is enabled
1399 * @dev: ATA device to test for
1400 *
1401 * LOCKING:
1402 * spin_lock_irqsave(host lock)
1403 *
1404 * RETURNS:
1405 * 1 if NCQ is enabled for @dev, 0 otherwise.
1406 */
1407static inline int ata_ncq_enabled(struct ata_device *dev)
1408{
1409 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF |
1410 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ;
1411}
1412
1413static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
1414{
1415 qc->tf.ctl |= ATA_NIEN;
1416}
1417
1418static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap,
1419 unsigned int tag)
1420{
1421 if (likely(ata_tag_valid(tag)))
1422 return &ap->qcmd[tag];
1423 return NULL;
1424}
1425
1426static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap,
1427 unsigned int tag)
1428{
1429 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
1430
1431 if (unlikely(!qc) || !ap->ops->error_handler)
1432 return qc;
1433
1434 if ((qc->flags & (ATA_QCFLAG_ACTIVE |
1435 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE)
1436 return qc;
1437
1438 return NULL;
1439}
1440
1441static inline unsigned int ata_qc_raw_nbytes(struct ata_queued_cmd *qc)
1442{
1443 return qc->nbytes - min(qc->extrabytes, qc->nbytes);
1444}
1445
1446static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
1447{
1448 memset(tf, 0, sizeof(*tf));
1449
1450#ifdef CONFIG_ATA_SFF
1451 tf->ctl = dev->link->ap->ctl;
1452#else
1453 tf->ctl = ATA_DEVCTL_OBS;
1454#endif
1455 if (dev->devno == 0)
1456 tf->device = ATA_DEVICE_OBS;
1457 else
1458 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
1459}
1460
1461static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
1462{
1463 qc->dma_dir = DMA_NONE;
1464 qc->sg = NULL;
1465 qc->flags = 0;
1466 qc->cursg = NULL;
1467 qc->cursg_ofs = 0;
1468 qc->nbytes = qc->extrabytes = qc->curbytes = 0;
1469 qc->n_elem = 0;
1470 qc->err_mask = 0;
1471 qc->sect_size = ATA_SECT_SIZE;
1472
1473 ata_tf_init(qc->dev, &qc->tf);
1474
1475 /* init result_tf such that it indicates normal completion */
1476 qc->result_tf.command = ATA_DRDY;
1477 qc->result_tf.feature = 0;
1478}
1479
1480static inline int ata_try_flush_cache(const struct ata_device *dev)
1481{
1482 return ata_id_wcache_enabled(dev->id) ||
1483 ata_id_has_flush(dev->id) ||
1484 ata_id_has_flush_ext(dev->id);
1485}
1486
1487static inline unsigned int ac_err_mask(u8 status)
1488{
1489 if (status & (ATA_BUSY | ATA_DRQ))
1490 return AC_ERR_HSM;
1491 if (status & (ATA_ERR | ATA_DF))
1492 return AC_ERR_DEV;
1493 return 0;
1494}
1495
1496static inline unsigned int __ac_err_mask(u8 status)
1497{
1498 unsigned int mask = ac_err_mask(status);
1499 if (mask == 0)
1500 return AC_ERR_OTHER;
1501 return mask;
1502}
1503
1504static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
1505{
1506 return *(struct ata_port **)&host->hostdata[0];
1507}
1508
1509static inline int ata_check_ready(u8 status)
1510{
1511 if (!(status & ATA_BUSY))
1512 return 1;
1513
1514 /* 0xff indicates either no device or device not ready */
1515 if (status == 0xff)
1516 return -ENODEV;
1517
1518 return 0;
1519}
1520
1521static inline unsigned long ata_deadline(unsigned long from_jiffies,
1522 unsigned long timeout_msecs)
1523{
1524 return from_jiffies + msecs_to_jiffies(timeout_msecs);
1525}
1526
1527/* Don't open code these in drivers as there are traps. Firstly the range may
1528 change in future hardware and specs, secondly 0xFF means 'no DMA' but is
1529 > UDMA_0. Dyma ddreigiau */
1530
1531static inline int ata_using_mwdma(struct ata_device *adev)
1532{
1533 if (adev->dma_mode >= XFER_MW_DMA_0 && adev->dma_mode <= XFER_MW_DMA_4)
1534 return 1;
1535 return 0;
1536}
1537
1538static inline int ata_using_udma(struct ata_device *adev)
1539{
1540 if (adev->dma_mode >= XFER_UDMA_0 && adev->dma_mode <= XFER_UDMA_7)
1541 return 1;
1542 return 0;
1543}
1544
1545static inline int ata_dma_enabled(struct ata_device *adev)
1546{
1547 return (adev->dma_mode == 0xFF ? 0 : 1);
1548}
1549
1550/**************************************************************************
1551 * PMP - drivers/ata/libata-pmp.c
1552 */
1553#ifdef CONFIG_SATA_PMP
1554
1555extern const struct ata_port_operations sata_pmp_port_ops;
1556
1557extern int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc);
1558extern void sata_pmp_error_handler(struct ata_port *ap);
1559
1560#else /* CONFIG_SATA_PMP */
1561
1562#define sata_pmp_port_ops sata_port_ops
1563#define sata_pmp_qc_defer_cmd_switch ata_std_qc_defer
1564#define sata_pmp_error_handler ata_std_error_handler
1565
1566#endif /* CONFIG_SATA_PMP */
1567
1568
1569/**************************************************************************
1570 * SFF - drivers/ata/libata-sff.c
1571 */
1572#ifdef CONFIG_ATA_SFF
1573
1574extern const struct ata_port_operations ata_sff_port_ops;
1575extern const struct ata_port_operations ata_bmdma32_port_ops;
1576
1577/* PIO only, sg_tablesize and dma_boundary limits can be removed */
1578#define ATA_PIO_SHT(drv_name) \
1579 ATA_BASE_SHT(drv_name), \
1580 .sg_tablesize = LIBATA_MAX_PRD, \
1581 .dma_boundary = ATA_DMA_BOUNDARY
1582
1583extern void ata_sff_dev_select(struct ata_port *ap, unsigned int device);
1584extern u8 ata_sff_check_status(struct ata_port *ap);
1585extern void ata_sff_pause(struct ata_port *ap);
1586extern void ata_sff_dma_pause(struct ata_port *ap);
1587extern int ata_sff_busy_sleep(struct ata_port *ap,
1588 unsigned long timeout_pat, unsigned long timeout);
1589extern int ata_sff_wait_ready(struct ata_link *link, unsigned long deadline);
1590extern void ata_sff_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
1591extern void ata_sff_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
1592extern void ata_sff_exec_command(struct ata_port *ap,
1593 const struct ata_taskfile *tf);
1594extern unsigned int ata_sff_data_xfer(struct ata_device *dev,
1595 unsigned char *buf, unsigned int buflen, int rw);
1596extern unsigned int ata_sff_data_xfer32(struct ata_device *dev,
1597 unsigned char *buf, unsigned int buflen, int rw);
1598extern unsigned int ata_sff_data_xfer_noirq(struct ata_device *dev,
1599 unsigned char *buf, unsigned int buflen, int rw);
1600extern void ata_sff_irq_on(struct ata_port *ap);
1601extern void ata_sff_irq_clear(struct ata_port *ap);
1602extern int ata_sff_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
1603 u8 status, int in_wq);
1604extern void ata_sff_queue_pio_task(struct ata_link *link, unsigned long delay);
1605extern unsigned int ata_sff_qc_issue(struct ata_queued_cmd *qc);
1606extern bool ata_sff_qc_fill_rtf(struct ata_queued_cmd *qc);
1607extern unsigned int ata_sff_port_intr(struct ata_port *ap,
1608 struct ata_queued_cmd *qc);
1609extern irqreturn_t ata_sff_interrupt(int irq, void *dev_instance);
1610extern void ata_sff_lost_interrupt(struct ata_port *ap);
1611extern void ata_sff_freeze(struct ata_port *ap);
1612extern void ata_sff_thaw(struct ata_port *ap);
1613extern int ata_sff_prereset(struct ata_link *link, unsigned long deadline);
1614extern unsigned int ata_sff_dev_classify(struct ata_device *dev, int present,
1615 u8 *r_err);
1616extern int ata_sff_wait_after_reset(struct ata_link *link, unsigned int devmask,
1617 unsigned long deadline);
1618extern int ata_sff_softreset(struct ata_link *link, unsigned int *classes,
1619 unsigned long deadline);
1620extern int sata_sff_hardreset(struct ata_link *link, unsigned int *class,
1621 unsigned long deadline);
1622extern void ata_sff_postreset(struct ata_link *link, unsigned int *classes);
1623extern void ata_sff_drain_fifo(struct ata_queued_cmd *qc);
1624extern void ata_sff_error_handler(struct ata_port *ap);
1625extern void ata_sff_std_ports(struct ata_ioports *ioaddr);
1626#ifdef CONFIG_PCI
1627extern int ata_pci_sff_init_host(struct ata_host *host);
1628extern int ata_pci_sff_prepare_host(struct pci_dev *pdev,
1629 const struct ata_port_info * const * ppi,
1630 struct ata_host **r_host);
1631extern int ata_pci_sff_activate_host(struct ata_host *host,
1632 irq_handler_t irq_handler,
1633 struct scsi_host_template *sht);
1634extern int ata_pci_sff_init_one(struct pci_dev *pdev,
1635 const struct ata_port_info * const * ppi,
1636 struct scsi_host_template *sht, void *host_priv, int hflags);
1637#endif /* CONFIG_PCI */
1638
1639#ifdef CONFIG_ATA_BMDMA
1640
1641extern const struct ata_port_operations ata_bmdma_port_ops;
1642
1643#define ATA_BMDMA_SHT(drv_name) \
1644 ATA_BASE_SHT(drv_name), \
1645 .sg_tablesize = LIBATA_MAX_PRD, \
1646 .dma_boundary = ATA_DMA_BOUNDARY
1647
1648extern void ata_bmdma_qc_prep(struct ata_queued_cmd *qc);
1649extern unsigned int ata_bmdma_qc_issue(struct ata_queued_cmd *qc);
1650extern void ata_bmdma_dumb_qc_prep(struct ata_queued_cmd *qc);
1651extern unsigned int ata_bmdma_port_intr(struct ata_port *ap,
1652 struct ata_queued_cmd *qc);
1653extern irqreturn_t ata_bmdma_interrupt(int irq, void *dev_instance);
1654extern void ata_bmdma_error_handler(struct ata_port *ap);
1655extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc);
1656extern void ata_bmdma_irq_clear(struct ata_port *ap);
1657extern void ata_bmdma_setup(struct ata_queued_cmd *qc);
1658extern void ata_bmdma_start(struct ata_queued_cmd *qc);
1659extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
1660extern u8 ata_bmdma_status(struct ata_port *ap);
1661extern int ata_bmdma_port_start(struct ata_port *ap);
1662extern int ata_bmdma_port_start32(struct ata_port *ap);
1663
1664#ifdef CONFIG_PCI
1665extern int ata_pci_bmdma_clear_simplex(struct pci_dev *pdev);
1666extern void ata_pci_bmdma_init(struct ata_host *host);
1667extern int ata_pci_bmdma_prepare_host(struct pci_dev *pdev,
1668 const struct ata_port_info * const * ppi,
1669 struct ata_host **r_host);
1670extern int ata_pci_bmdma_init_one(struct pci_dev *pdev,
1671 const struct ata_port_info * const * ppi,
1672 struct scsi_host_template *sht,
1673 void *host_priv, int hflags);
1674#endif /* CONFIG_PCI */
1675#endif /* CONFIG_ATA_BMDMA */
1676
1677/**
1678 * ata_sff_busy_wait - Wait for a port status register
1679 * @ap: Port to wait for.
1680 * @bits: bits that must be clear
1681 * @max: number of 10uS waits to perform
1682 *
1683 * Waits up to max*10 microseconds for the selected bits in the port's
1684 * status register to be cleared.
1685 * Returns final value of status register.
1686 *
1687 * LOCKING:
1688 * Inherited from caller.
1689 */
1690static inline u8 ata_sff_busy_wait(struct ata_port *ap, unsigned int bits,
1691 unsigned int max)
1692{
1693 u8 status;
1694
1695 do {
1696 udelay(10);
1697 status = ap->ops->sff_check_status(ap);
1698 max--;
1699 } while (status != 0xff && (status & bits) && (max > 0));
1700
1701 return status;
1702}
1703
1704/**
1705 * ata_wait_idle - Wait for a port to be idle.
1706 * @ap: Port to wait for.
1707 *
1708 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
1709 * Returns final value of status register.
1710 *
1711 * LOCKING:
1712 * Inherited from caller.
1713 */
1714static inline u8 ata_wait_idle(struct ata_port *ap)
1715{
1716 u8 status = ata_sff_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
1717
1718#ifdef ATA_DEBUG
1719 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ)))
1720 ata_port_printk(ap, KERN_DEBUG, "abnormal Status 0x%X\n",
1721 status);
1722#endif
1723
1724 return status;
1725}
1726#endif /* CONFIG_ATA_SFF */
1727
1728#endif /* __LINUX_LIBATA_H__ */
Linux kernel - Deliverables
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