?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
vmalloc: remove BUG_ON due to racy counting of VM_LAZY_FREE
[linux-2.6/linux-2.6-openrd.git] / include / linux / libata.h
blob73112250862c42d78a72b20d241d31a936c34844
1 /*
2 * Copyright 2003-2005 Red Hat, Inc. All rights reserved.
3 * Copyright 2003-2005 Jeff Garzik
4 *
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2, or (at your option)
9 * any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; see the file COPYING. If not, write to
18 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
19 *
20 *
21 * libata documentation is available via 'make {ps|pdf}docs',
22 * as Documentation/DocBook/libata.*
23 *
24 */
25
26 #ifndef __LINUX_LIBATA_H__
27 #define __LINUX_LIBATA_H__
28
29 #include <linux/delay.h>
30 #include <linux/jiffies.h>
31 #include <linux/interrupt.h>
32 #include <linux/dma-mapping.h>
33 #include <linux/scatterlist.h>
34 #include <linux/io.h>
35 #include <linux/ata.h>
36 #include <linux/workqueue.h>
37 #include <scsi/scsi_host.h>
38 #include <linux/acpi.h>
39 #include <linux/cdrom.h>
40
41 /*
42 * Define if arch has non-standard setup. This is a _PCI_ standard
43 * not a legacy or ISA standard.
44 */
45 #ifdef CONFIG_ATA_NONSTANDARD
46 #include <asm/libata-portmap.h>
47 #else
48 #include <asm-generic/libata-portmap.h>
49 #endif
50
51 /*
52 * compile-time options: to be removed as soon as all the drivers are
53 * converted to the new debugging mechanism
54 */
55 #undef ATA_DEBUG /* debugging output */
56 #undef ATA_VERBOSE_DEBUG /* yet more debugging output */
57 #undef ATA_IRQ_TRAP /* define to ack screaming irqs */
58 #undef ATA_NDEBUG /* define to disable quick runtime checks */
59
60
61 /* note: prints function name for you */
62 #ifdef ATA_DEBUG
63 #define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args)
64 #ifdef ATA_VERBOSE_DEBUG
65 #define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args)
66 #else
67 #define VPRINTK(fmt, args...)
68 #endif /* ATA_VERBOSE_DEBUG */
69 #else
70 #define DPRINTK(fmt, args...)
71 #define VPRINTK(fmt, args...)
72 #endif /* ATA_DEBUG */
73
74 #define BPRINTK(fmt, args...) if (ap->flags & ATA_FLAG_DEBUGMSG) printk(KERN_ERR "%s: " fmt, __func__, ## args)
75
76 /* NEW: debug levels */
77 #define HAVE_LIBATA_MSG 1
78
79 enum {
80 ATA_MSG_DRV = 0x0001,
81 ATA_MSG_INFO = 0x0002,
82 ATA_MSG_PROBE = 0x0004,
83 ATA_MSG_WARN = 0x0008,
84 ATA_MSG_MALLOC = 0x0010,
85 ATA_MSG_CTL = 0x0020,
86 ATA_MSG_INTR = 0x0040,
87 ATA_MSG_ERR = 0x0080,
88 };
89
90 #define ata_msg_drv(p) ((p)->msg_enable & ATA_MSG_DRV)
91 #define ata_msg_info(p) ((p)->msg_enable & ATA_MSG_INFO)
92 #define ata_msg_probe(p) ((p)->msg_enable & ATA_MSG_PROBE)
93 #define ata_msg_warn(p) ((p)->msg_enable & ATA_MSG_WARN)
94 #define ata_msg_malloc(p) ((p)->msg_enable & ATA_MSG_MALLOC)
95 #define ata_msg_ctl(p) ((p)->msg_enable & ATA_MSG_CTL)
96 #define ata_msg_intr(p) ((p)->msg_enable & ATA_MSG_INTR)
97 #define ata_msg_err(p) ((p)->msg_enable & ATA_MSG_ERR)
98
99 static inline u32 ata_msg_init(int dval, int default_msg_enable_bits)
100 {
101 if (dval < 0 || dval >= (sizeof(u32) * 8))
102 return default_msg_enable_bits; /* should be 0x1 - only driver info msgs */
103 if (!dval)
104 return 0;
105 return (1 << dval) - 1;
106 }
107
108 /* defines only for the constants which don't work well as enums */
109 #define ATA_TAG_POISON 0xfafbfcfdU
110
111 enum {
112 /* various global constants */
113 LIBATA_MAX_PRD = ATA_MAX_PRD / 2,
114 LIBATA_DUMB_MAX_PRD = ATA_MAX_PRD / 4, /* Worst case */
115 ATA_DEF_QUEUE = 1,
116 /* tag ATA_MAX_QUEUE - 1 is reserved for internal commands */
117 ATA_MAX_QUEUE = 32,
118 ATA_TAG_INTERNAL = ATA_MAX_QUEUE - 1,
119 ATA_SHORT_PAUSE = 16,
120
121 ATAPI_MAX_DRAIN = 16 << 10,
122
123 ATA_ALL_DEVICES = (1 << ATA_MAX_DEVICES) - 1,
124
125 ATA_SHT_EMULATED = 1,
126 ATA_SHT_CMD_PER_LUN = 1,
127 ATA_SHT_THIS_ID = -1,
128 ATA_SHT_USE_CLUSTERING = 1,
129
130 /* struct ata_device stuff */
131 ATA_DFLAG_LBA = (1 << 0), /* device supports LBA */
132 ATA_DFLAG_LBA48 = (1 << 1), /* device supports LBA48 */
133 ATA_DFLAG_CDB_INTR = (1 << 2), /* device asserts INTRQ when ready for CDB */
134 ATA_DFLAG_NCQ = (1 << 3), /* device supports NCQ */
135 ATA_DFLAG_FLUSH_EXT = (1 << 4), /* do FLUSH_EXT instead of FLUSH */
136 ATA_DFLAG_ACPI_PENDING = (1 << 5), /* ACPI resume action pending */
137 ATA_DFLAG_ACPI_FAILED = (1 << 6), /* ACPI on devcfg has failed */
138 ATA_DFLAG_AN = (1 << 7), /* AN configured */
139 ATA_DFLAG_HIPM = (1 << 8), /* device supports HIPM */
140 ATA_DFLAG_DIPM = (1 << 9), /* device supports DIPM */
141 ATA_DFLAG_DMADIR = (1 << 10), /* device requires DMADIR */
142 ATA_DFLAG_CFG_MASK = (1 << 12) - 1,
143
144 ATA_DFLAG_PIO = (1 << 12), /* device limited to PIO mode */
145 ATA_DFLAG_NCQ_OFF = (1 << 13), /* device limited to non-NCQ mode */
146 ATA_DFLAG_SLEEPING = (1 << 15), /* device is sleeping */
147 ATA_DFLAG_DUBIOUS_XFER = (1 << 16), /* data transfer not verified */
148 ATA_DFLAG_NO_UNLOAD = (1 << 17), /* device doesn't support unload */
149 ATA_DFLAG_INIT_MASK = (1 << 24) - 1,
150
151 ATA_DFLAG_DETACH = (1 << 24),
152 ATA_DFLAG_DETACHED = (1 << 25),
153
154 ATA_DEV_UNKNOWN = 0, /* unknown device */
155 ATA_DEV_ATA = 1, /* ATA device */
156 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */
157 ATA_DEV_ATAPI = 3, /* ATAPI device */
158 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */
159 ATA_DEV_PMP = 5, /* SATA port multiplier */
160 ATA_DEV_PMP_UNSUP = 6, /* SATA port multiplier (unsupported) */
161 ATA_DEV_SEMB = 7, /* SEMB */
162 ATA_DEV_SEMB_UNSUP = 8, /* SEMB (unsupported) */
163 ATA_DEV_NONE = 9, /* no device */
164
165 /* struct ata_link flags */
166 ATA_LFLAG_NO_HRST = (1 << 1), /* avoid hardreset */
167 ATA_LFLAG_NO_SRST = (1 << 2), /* avoid softreset */
168 ATA_LFLAG_ASSUME_ATA = (1 << 3), /* assume ATA class */
169 ATA_LFLAG_ASSUME_SEMB = (1 << 4), /* assume SEMB class */
170 ATA_LFLAG_ASSUME_CLASS = ATA_LFLAG_ASSUME_ATA | ATA_LFLAG_ASSUME_SEMB,
171 ATA_LFLAG_NO_RETRY = (1 << 5), /* don't retry this link */
172 ATA_LFLAG_DISABLED = (1 << 6), /* link is disabled */
173 ATA_LFLAG_SW_ACTIVITY = (1 << 7), /* keep activity stats */
174
175 /* struct ata_port flags */
176 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */
177 /* (doesn't imply presence) */
178 ATA_FLAG_SATA = (1 << 1),
179 ATA_FLAG_NO_LEGACY = (1 << 2), /* no legacy mode check */
180 ATA_FLAG_MMIO = (1 << 3), /* use MMIO, not PIO */
181 ATA_FLAG_SRST = (1 << 4), /* (obsolete) use ATA SRST, not E.D.D. */
182 ATA_FLAG_SATA_RESET = (1 << 5), /* (obsolete) use COMRESET */
183 ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */
184 ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */
185 ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */
186 ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD
187 * doesn't handle PIO interrupts */
188 ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */
189 ATA_FLAG_NO_POWEROFF_SPINDOWN = (1 << 11), /* don't spindown before poweroff */
190 ATA_FLAG_NO_HIBERNATE_SPINDOWN = (1 << 12), /* don't spindown before hibernation */
191 ATA_FLAG_DEBUGMSG = (1 << 13),
192 ATA_FLAG_FPDMA_AA = (1 << 14), /* driver supports Auto-Activate */
193 ATA_FLAG_IGN_SIMPLEX = (1 << 15), /* ignore SIMPLEX */
194 ATA_FLAG_NO_IORDY = (1 << 16), /* controller lacks iordy */
195 ATA_FLAG_ACPI_SATA = (1 << 17), /* need native SATA ACPI layout */
196 ATA_FLAG_AN = (1 << 18), /* controller supports AN */
197 ATA_FLAG_PMP = (1 << 19), /* controller supports PMP */
198 ATA_FLAG_IPM = (1 << 20), /* driver can handle IPM */
199 ATA_FLAG_EM = (1 << 21), /* driver supports enclosure
200 * management */
201 ATA_FLAG_SW_ACTIVITY = (1 << 22), /* driver supports sw activity
202 * led */
203
204 /* The following flag belongs to ap->pflags but is kept in
205 * ap->flags because it's referenced in many LLDs and will be
206 * removed in not-too-distant future.
207 */
208 ATA_FLAG_DISABLED = (1 << 23), /* port is disabled, ignore it */
209
210 /* bits 24:31 of ap->flags are reserved for LLD specific flags */
211
212
213 /* struct ata_port pflags */
214 ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */
215 ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */
216 ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */
217 ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */
218 ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */
219 ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */
220 ATA_PFLAG_INITIALIZING = (1 << 7), /* being initialized, don't touch */
221 ATA_PFLAG_RESETTING = (1 << 8), /* reset in progress */
222 ATA_PFLAG_UNLOADING = (1 << 9), /* driver is being unloaded */
223 ATA_PFLAG_UNLOADED = (1 << 10), /* driver is unloaded */
224
225 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */
226 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */
227 ATA_PFLAG_INIT_GTM_VALID = (1 << 19), /* initial gtm data valid */
228
229 ATA_PFLAG_PIO32 = (1 << 20), /* 32bit PIO */
230 ATA_PFLAG_PIO32CHANGE = (1 << 21), /* 32bit PIO can be turned on/off */
231
232 /* struct ata_queued_cmd flags */
233 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */
234 ATA_QCFLAG_DMAMAP = (1 << 1), /* SG table is DMA mapped */
235 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */
236 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */
237 ATA_QCFLAG_CLEAR_EXCL = (1 << 5), /* clear excl_link on completion */
238 ATA_QCFLAG_QUIET = (1 << 6), /* don't report device error */
239 ATA_QCFLAG_RETRY = (1 << 7), /* retry after failure */
240
241 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */
242 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */
243 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */
244
245 /* host set flags */
246 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */
247 ATA_HOST_STARTED = (1 << 1), /* Host started */
248 ATA_HOST_PARALLEL_SCAN = (1 << 2), /* Ports on this host can be scanned in parallel */
249
250 /* bits 24:31 of host->flags are reserved for LLD specific flags */
251
252 /* various lengths of time */
253 ATA_TMOUT_BOOT = 30000, /* heuristic */
254 ATA_TMOUT_BOOT_QUICK = 7000, /* heuristic */
255 ATA_TMOUT_INTERNAL_QUICK = 5000,
256 ATA_TMOUT_MAX_PARK = 30000,
257
258 /* FIXME: GoVault needs 2s but we can't afford that without
259 * parallel probing. 800ms is enough for iVDR disk
260 * HHD424020F7SV00. Increase to 2secs when parallel probing
261 * is in place.
262 */
263 ATA_TMOUT_FF_WAIT = 800,
264
265 /* Spec mandates to wait for ">= 2ms" before checking status
266 * after reset. We wait 150ms, because that was the magic
267 * delay used for ATAPI devices in Hale Landis's ATADRVR, for
268 * the period of time between when the ATA command register is
269 * written, and then status is checked. Because waiting for
270 * "a while" before checking status is fine, post SRST, we
271 * perform this magic delay here as well.
272 *
273 * Old drivers/ide uses the 2mS rule and then waits for ready.
274 */
275 ATA_WAIT_AFTER_RESET = 150,
276
277 /* If PMP is supported, we have to do follow-up SRST. As some
278 * PMPs don't send D2H Reg FIS after hardreset, LLDs are
279 * advised to wait only for the following duration before
280 * doing SRST.
281 */
282 ATA_TMOUT_PMP_SRST_WAIT = 5000,
283
284 /* ATA bus states */
285 BUS_UNKNOWN = 0,
286 BUS_DMA = 1,
287 BUS_IDLE = 2,
288 BUS_NOINTR = 3,
289 BUS_NODATA = 4,
290 BUS_TIMER = 5,
291 BUS_PIO = 6,
292 BUS_EDD = 7,
293 BUS_IDENTIFY = 8,
294 BUS_PACKET = 9,
295
296 /* SATA port states */
297 PORT_UNKNOWN = 0,
298 PORT_ENABLED = 1,
299 PORT_DISABLED = 2,
300
301 /* encoding various smaller bitmaps into a single
302 * unsigned long bitmap
303 */
304 ATA_NR_PIO_MODES = 7,
305 ATA_NR_MWDMA_MODES = 5,
306 ATA_NR_UDMA_MODES = 8,
307
308 ATA_SHIFT_PIO = 0,
309 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_NR_PIO_MODES,
310 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_NR_MWDMA_MODES,
311
312 /* size of buffer to pad xfers ending on unaligned boundaries */
313 ATA_DMA_PAD_SZ = 4,
314
315 /* ering size */
316 ATA_ERING_SIZE = 32,
317
318 /* return values for ->qc_defer */
319 ATA_DEFER_LINK = 1,
320 ATA_DEFER_PORT = 2,
321
322 /* desc_len for ata_eh_info and context */
323 ATA_EH_DESC_LEN = 80,
324
325 /* reset / recovery action types */
326 ATA_EH_REVALIDATE = (1 << 0),
327 ATA_EH_SOFTRESET = (1 << 1), /* meaningful only in ->prereset */
328 ATA_EH_HARDRESET = (1 << 2), /* meaningful only in ->prereset */
329 ATA_EH_RESET = ATA_EH_SOFTRESET | ATA_EH_HARDRESET,
330 ATA_EH_ENABLE_LINK = (1 << 3),
331 ATA_EH_LPM = (1 << 4), /* link power management action */
332 ATA_EH_PARK = (1 << 5), /* unload heads and stop I/O */
333
334 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE | ATA_EH_PARK,
335 ATA_EH_ALL_ACTIONS = ATA_EH_REVALIDATE | ATA_EH_RESET |
336 ATA_EH_ENABLE_LINK | ATA_EH_LPM,
337
338 /* ata_eh_info->flags */
339 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */
340 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */
341 ATA_EHI_QUIET = (1 << 3), /* be quiet */
342
343 ATA_EHI_DID_SOFTRESET = (1 << 16), /* already soft-reset this port */
344 ATA_EHI_DID_HARDRESET = (1 << 17), /* already soft-reset this port */
345 ATA_EHI_PRINTINFO = (1 << 18), /* print configuration info */
346 ATA_EHI_SETMODE = (1 << 19), /* configure transfer mode */
347 ATA_EHI_POST_SETMODE = (1 << 20), /* revaildating after setmode */
348
349 ATA_EHI_DID_RESET = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET,
350
351 /* mask of flags to transfer *to* the slave link */
352 ATA_EHI_TO_SLAVE_MASK = ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET,
353
354 /* max tries if error condition is still set after ->error_handler */
355 ATA_EH_MAX_TRIES = 5,
356
357 /* sometimes resuming a link requires several retries */
358 ATA_LINK_RESUME_TRIES = 5,
359
360 /* how hard are we gonna try to probe/recover devices */
361 ATA_PROBE_MAX_TRIES = 3,
362 ATA_EH_DEV_TRIES = 3,
363 ATA_EH_PMP_TRIES = 5,
364 ATA_EH_PMP_LINK_TRIES = 3,
365
366 SATA_PMP_RW_TIMEOUT = 3000, /* PMP read/write timeout */
367
368 /* This should match the actual table size of
369 * ata_eh_cmd_timeout_table in libata-eh.c.
370 */
371 ATA_EH_CMD_TIMEOUT_TABLE_SIZE = 6,
372
373 /* Horkage types. May be set by libata or controller on drives
374 (some horkage may be drive/controller pair dependant */
375
376 ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */
377 ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */
378 ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */
379 ATA_HORKAGE_MAX_SEC_128 = (1 << 3), /* Limit max sects to 128 */
380 ATA_HORKAGE_BROKEN_HPA = (1 << 4), /* Broken HPA */
381 ATA_HORKAGE_DISABLE = (1 << 5), /* Disable it */
382 ATA_HORKAGE_HPA_SIZE = (1 << 6), /* native size off by one */
383 ATA_HORKAGE_IPM = (1 << 7), /* Link PM problems */
384 ATA_HORKAGE_IVB = (1 << 8), /* cbl det validity bit bugs */
385 ATA_HORKAGE_STUCK_ERR = (1 << 9), /* stuck ERR on next PACKET */
386 ATA_HORKAGE_BRIDGE_OK = (1 << 10), /* no bridge limits */
387 ATA_HORKAGE_ATAPI_MOD16_DMA = (1 << 11), /* use ATAPI DMA for commands
388 not multiple of 16 bytes */
389 ATA_HORKAGE_FIRMWARE_WARN = (1 << 12), /* firmware update warning */
390 ATA_HORKAGE_1_5_GBPS = (1 << 13), /* force 1.5 Gbps */
391 ATA_HORKAGE_NOSETXFER = (1 << 14), /* skip SETXFER, SATA only */
392 ATA_HORKAGE_BROKEN_FPDMA_AA = (1 << 15), /* skip AA */
393
394 /* DMA mask for user DMA control: User visible values; DO NOT
395 renumber */
396 ATA_DMA_MASK_ATA = (1 << 0), /* DMA on ATA Disk */
397 ATA_DMA_MASK_ATAPI = (1 << 1), /* DMA on ATAPI */
398 ATA_DMA_MASK_CFA = (1 << 2), /* DMA on CF Card */
399
400 /* ATAPI command types */
401 ATAPI_READ = 0, /* READs */
402 ATAPI_WRITE = 1, /* WRITEs */
403 ATAPI_READ_CD = 2, /* READ CD [MSF] */
404 ATAPI_PASS_THRU = 3, /* SAT pass-thru */
405 ATAPI_MISC = 4, /* the rest */
406
407 /* Timing constants */
408 ATA_TIMING_SETUP = (1 << 0),
409 ATA_TIMING_ACT8B = (1 << 1),
410 ATA_TIMING_REC8B = (1 << 2),
411 ATA_TIMING_CYC8B = (1 << 3),
412 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
413 ATA_TIMING_CYC8B,
414 ATA_TIMING_ACTIVE = (1 << 4),
415 ATA_TIMING_RECOVER = (1 << 5),
416 ATA_TIMING_DMACK_HOLD = (1 << 6),
417 ATA_TIMING_CYCLE = (1 << 7),
418 ATA_TIMING_UDMA = (1 << 8),
419 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
420 ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
421 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
422 ATA_TIMING_DMACK_HOLD | ATA_TIMING_CYCLE |
423 ATA_TIMING_UDMA,
424
425 /* ACPI constants */
426 ATA_ACPI_FILTER_SETXFER = 1 << 0,
427 ATA_ACPI_FILTER_LOCK = 1 << 1,
428 ATA_ACPI_FILTER_DIPM = 1 << 2,
429 ATA_ACPI_FILTER_FPDMA_OFFSET = 1 << 3, /* FPDMA non-zero offset */
430 ATA_ACPI_FILTER_FPDMA_AA = 1 << 4, /* FPDMA auto activate */
431
432 ATA_ACPI_FILTER_DEFAULT = ATA_ACPI_FILTER_SETXFER |
433 ATA_ACPI_FILTER_LOCK |
434 ATA_ACPI_FILTER_DIPM,
435 };
436
437 enum ata_xfer_mask {
438 ATA_MASK_PIO = ((1LU << ATA_NR_PIO_MODES) - 1)
439 << ATA_SHIFT_PIO,
440 ATA_MASK_MWDMA = ((1LU << ATA_NR_MWDMA_MODES) - 1)
441 << ATA_SHIFT_MWDMA,
442 ATA_MASK_UDMA = ((1LU << ATA_NR_UDMA_MODES) - 1)
443 << ATA_SHIFT_UDMA,
444 };
445
446 enum hsm_task_states {
447 HSM_ST_IDLE, /* no command on going */
448 HSM_ST_FIRST, /* (waiting the device to)
449 write CDB or first data block */
450 HSM_ST, /* (waiting the device to) transfer data */
451 HSM_ST_LAST, /* (waiting the device to) complete command */
452 HSM_ST_ERR, /* error */
453 };
454
455 enum ata_completion_errors {
456 AC_ERR_DEV = (1 << 0), /* device reported error */
457 AC_ERR_HSM = (1 << 1), /* host state machine violation */
458 AC_ERR_TIMEOUT = (1 << 2), /* timeout */
459 AC_ERR_MEDIA = (1 << 3), /* media error */
460 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */
461 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */
462 AC_ERR_SYSTEM = (1 << 6), /* system error */
463 AC_ERR_INVALID = (1 << 7), /* invalid argument */
464 AC_ERR_OTHER = (1 << 8), /* unknown */
465 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */
466 AC_ERR_NCQ = (1 << 10), /* marker for offending NCQ qc */
467 };
468
469 /* forward declarations */
470 struct scsi_device;
471 struct ata_port_operations;
472 struct ata_port;
473 struct ata_link;
474 struct ata_queued_cmd;
475
476 /* typedefs */
477 typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
478 typedef int (*ata_prereset_fn_t)(struct ata_link *link, unsigned long deadline);
479 typedef int (*ata_reset_fn_t)(struct ata_link *link, unsigned int *classes,
480 unsigned long deadline);
481 typedef void (*ata_postreset_fn_t)(struct ata_link *link, unsigned int *classes);
482
483 /*
484 * host pm policy: If you alter this, you also need to alter libata-scsi.c
485 * (for the ascii descriptions)
486 */
487 enum link_pm {
488 NOT_AVAILABLE,
489 MIN_POWER,
490 MAX_PERFORMANCE,
491 MEDIUM_POWER,
492 };
493 extern struct device_attribute dev_attr_link_power_management_policy;
494 extern struct device_attribute dev_attr_unload_heads;
495 extern struct device_attribute dev_attr_em_message_type;
496 extern struct device_attribute dev_attr_em_message;
497 extern struct device_attribute dev_attr_sw_activity;
498
499 enum sw_activity {
500 OFF,
501 BLINK_ON,
502 BLINK_OFF,
503 };
504
505 #ifdef CONFIG_ATA_SFF
506 struct ata_ioports {
507 void __iomem *cmd_addr;
508 void __iomem *data_addr;
509 void __iomem *error_addr;
510 void __iomem *feature_addr;
511 void __iomem *nsect_addr;
512 void __iomem *lbal_addr;
513 void __iomem *lbam_addr;
514 void __iomem *lbah_addr;
515 void __iomem *device_addr;
516 void __iomem *status_addr;
517 void __iomem *command_addr;
518 void __iomem *altstatus_addr;
519 void __iomem *ctl_addr;
520 void __iomem *bmdma_addr;
521 void __iomem *scr_addr;
522 };
523 #endif /* CONFIG_ATA_SFF */
524
525 struct 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
540 struct 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
578 struct ata_port_stats {
579 unsigned long unhandled_irq;
580 unsigned long idle_irq;
581 unsigned long rw_reqbuf;
582 };
583
584 struct ata_ering_entry {
585 unsigned int eflags;
586 unsigned int err_mask;
587 u64 timestamp;
588 };
589
590 struct ata_ering {
591 int cursor;
592 struct ata_ering_entry ring[ATA_ERING_SIZE];
593 };
594
595 struct 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 /* n_sector is CLEAR_BEGIN, read comment above CLEAR_BEGIN */
608 u64 n_sectors; /* size of device, if ATA */
609 u64 n_native_sectors; /* native size, if ATA */
610 unsigned int class; /* ATA_DEV_xxx */
611 unsigned long unpark_deadline;
612
613 u8 pio_mode;
614 u8 dma_mode;
615 u8 xfer_mode;
616 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
617
618 unsigned int multi_count; /* sectors count for
619 READ/WRITE MULTIPLE */
620 unsigned int max_sectors; /* per-device max sectors */
621 unsigned int cdb_len;
622
623 /* per-dev xfer mask */
624 unsigned long pio_mask;
625 unsigned long mwdma_mask;
626 unsigned long udma_mask;
627
628 /* for CHS addressing */
629 u16 cylinders; /* Number of cylinders */
630 u16 heads; /* Number of heads */
631 u16 sectors; /* Number of sectors per track */
632
633 union {
634 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
635 u32 gscr[SATA_PMP_GSCR_DWORDS]; /* PMP GSCR block */
636 };
637
638 /* error history */
639 int spdn_cnt;
640 /* ering is CLEAR_END, read comment above CLEAR_END */
641 struct ata_ering ering;
642 };
643
644 /* Fields between ATA_DEVICE_CLEAR_BEGIN and ATA_DEVICE_CLEAR_END are
645 * cleared to zero on ata_dev_init().
646 */
647 #define ATA_DEVICE_CLEAR_BEGIN offsetof(struct ata_device, n_sectors)
648 #define ATA_DEVICE_CLEAR_END offsetof(struct ata_device, ering)
649
650 struct ata_eh_info {
651 struct ata_device *dev; /* offending device */
652 u32 serror; /* SError from LLDD */
653 unsigned int err_mask; /* port-wide err_mask */
654 unsigned int action; /* ATA_EH_* action mask */
655 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */
656 unsigned int flags; /* ATA_EHI_* flags */
657
658 unsigned int probe_mask;
659
660 char desc[ATA_EH_DESC_LEN];
661 int desc_len;
662 };
663
664 struct ata_eh_context {
665 struct ata_eh_info i;
666 int tries[ATA_MAX_DEVICES];
667 int cmd_timeout_idx[ATA_MAX_DEVICES]
668 [ATA_EH_CMD_TIMEOUT_TABLE_SIZE];
669 unsigned int classes[ATA_MAX_DEVICES];
670 unsigned int did_probe_mask;
671 unsigned int unloaded_mask;
672 unsigned int saved_ncq_enabled;
673 u8 saved_xfer_mode[ATA_MAX_DEVICES];
674 /* timestamp for the last reset attempt or success */
675 unsigned long last_reset;
676 };
677
678 struct ata_acpi_drive
679 {
680 u32 pio;
681 u32 dma;
682 } __packed;
683
684 struct ata_acpi_gtm {
685 struct ata_acpi_drive drive[2];
686 u32 flags;
687 } __packed;
688
689 struct ata_link {
690 struct ata_port *ap;
691 int pmp; /* port multiplier port # */
692
693 unsigned int active_tag; /* active tag on this link */
694 u32 sactive; /* active NCQ commands */
695
696 unsigned int flags; /* ATA_LFLAG_xxx */
697
698 u32 saved_scontrol; /* SControl on probe */
699 unsigned int hw_sata_spd_limit;
700 unsigned int sata_spd_limit;
701 unsigned int sata_spd; /* current SATA PHY speed */
702
703 /* record runtime error info, protected by host_set lock */
704 struct ata_eh_info eh_info;
705 /* EH context */
706 struct ata_eh_context eh_context;
707
708 struct ata_device device[ATA_MAX_DEVICES];
709 };
710
711 struct ata_port {
712 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */
713 struct ata_port_operations *ops;
714 spinlock_t *lock;
715 /* Flags owned by the EH context. Only EH should touch these once the
716 port is active */
717 unsigned long flags; /* ATA_FLAG_xxx */
718 /* Flags that change dynamically, protected by ap->lock */
719 unsigned int pflags; /* ATA_PFLAG_xxx */
720 unsigned int print_id; /* user visible unique port ID */
721 unsigned int port_no; /* 0 based port no. inside the host */
722
723 struct ata_prd *prd; /* our SG list */
724 dma_addr_t prd_dma; /* and its DMA mapping */
725
726 #ifdef CONFIG_ATA_SFF
727 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
728 #endif /* CONFIG_ATA_SFF */
729
730 u8 ctl; /* cache of ATA control register */
731 u8 last_ctl; /* Cache last written value */
732 unsigned int pio_mask;
733 unsigned int mwdma_mask;
734 unsigned int udma_mask;
735 unsigned int cbl; /* cable type; ATA_CBL_xxx */
736
737 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
738 unsigned long qc_allocated;
739 unsigned int qc_active;
740 int nr_active_links; /* #links with active qcs */
741
742 struct ata_link link; /* host default link */
743 struct ata_link *slave_link; /* see ata_slave_link_init() */
744
745 int nr_pmp_links; /* nr of available PMP links */
746 struct ata_link *pmp_link; /* array of PMP links */
747 struct ata_link *excl_link; /* for PMP qc exclusion */
748
749 struct ata_port_stats stats;
750 struct ata_host *host;
751 struct device *dev;
752
753 void *port_task_data;
754 struct delayed_work port_task;
755 struct delayed_work hotplug_task;
756 struct work_struct scsi_rescan_task;
757
758 unsigned int hsm_task_state;
759
760 u32 msg_enable;
761 struct list_head eh_done_q;
762 wait_queue_head_t eh_wait_q;
763 int eh_tries;
764 struct completion park_req_pending;
765
766 pm_message_t pm_mesg;
767 int *pm_result;
768 enum link_pm pm_policy;
769
770 struct timer_list fastdrain_timer;
771 unsigned long fastdrain_cnt;
772
773 int em_message_type;
774 void *private_data;
775
776 #ifdef CONFIG_ATA_ACPI
777 acpi_handle acpi_handle;
778 struct ata_acpi_gtm __acpi_init_gtm; /* use ata_acpi_init_gtm() */
779 #endif
780 /* owned by EH */
781 u8 sector_buf[ATA_SECT_SIZE] ____cacheline_aligned;
782 };
783
784 /* The following initializer overrides a method to NULL whether one of
785 * its parent has the method defined or not. This is equivalent to
786 * ERR_PTR(-ENOENT). Unfortunately, ERR_PTR doesn't render a constant
787 * expression and thus can't be used as an initializer.
788 */
789 #define ATA_OP_NULL (void *)(unsigned long)(-ENOENT)
790
791 struct ata_port_operations {
792 /*
793 * Command execution
794 */
795 int (*qc_defer)(struct ata_queued_cmd *qc);
796 int (*check_atapi_dma)(struct ata_queued_cmd *qc);
797 void (*qc_prep)(struct ata_queued_cmd *qc);
798 unsigned int (*qc_issue)(struct ata_queued_cmd *qc);
799 bool (*qc_fill_rtf)(struct ata_queued_cmd *qc);
800
801 /*
802 * Configuration and exception handling
803 */
804 int (*cable_detect)(struct ata_port *ap);
805 unsigned long (*mode_filter)(struct ata_device *dev, unsigned long xfer_mask);
806 void (*set_piomode)(struct ata_port *ap, struct ata_device *dev);
807 void (*set_dmamode)(struct ata_port *ap, struct ata_device *dev);
808 int (*set_mode)(struct ata_link *link, struct ata_device **r_failed_dev);
809 unsigned int (*read_id)(struct ata_device *dev, struct ata_taskfile *tf, u16 *id);
810
811 void (*dev_config)(struct ata_device *dev);
812
813 void (*freeze)(struct ata_port *ap);
814 void (*thaw)(struct ata_port *ap);
815 ata_prereset_fn_t prereset;
816 ata_reset_fn_t softreset;
817 ata_reset_fn_t hardreset;
818 ata_postreset_fn_t postreset;
819 ata_prereset_fn_t pmp_prereset;
820 ata_reset_fn_t pmp_softreset;
821 ata_reset_fn_t pmp_hardreset;
822 ata_postreset_fn_t pmp_postreset;
823 void (*error_handler)(struct ata_port *ap);
824 void (*lost_interrupt)(struct ata_port *ap);
825 void (*post_internal_cmd)(struct ata_queued_cmd *qc);
826
827 /*
828 * Optional features
829 */
830 int (*scr_read)(struct ata_link *link, unsigned int sc_reg, u32 *val);
831 int (*scr_write)(struct ata_link *link, unsigned int sc_reg, u32 val);
832 void (*pmp_attach)(struct ata_port *ap);
833 void (*pmp_detach)(struct ata_port *ap);
834 int (*enable_pm)(struct ata_port *ap, enum link_pm policy);
835 void (*disable_pm)(struct ata_port *ap);
836
837 /*
838 * Start, stop, suspend and resume
839 */
840 int (*port_suspend)(struct ata_port *ap, pm_message_t mesg);
841 int (*port_resume)(struct ata_port *ap);
842 int (*port_start)(struct ata_port *ap);
843 void (*port_stop)(struct ata_port *ap);
844 void (*host_stop)(struct ata_host *host);
845
846 #ifdef CONFIG_ATA_SFF
847 /*
848 * SFF / taskfile oriented ops
849 */
850 void (*sff_dev_select)(struct ata_port *ap, unsigned int device);
851 u8 (*sff_check_status)(struct ata_port *ap);
852 u8 (*sff_check_altstatus)(struct ata_port *ap);
853 void (*sff_tf_load)(struct ata_port *ap, const struct ata_taskfile *tf);
854 void (*sff_tf_read)(struct ata_port *ap, struct ata_taskfile *tf);
855 void (*sff_exec_command)(struct ata_port *ap,
856 const struct ata_taskfile *tf);
857 unsigned int (*sff_data_xfer)(struct ata_device *dev,
858 unsigned char *buf, unsigned int buflen, int rw);
859 u8 (*sff_irq_on)(struct ata_port *);
860 void (*sff_irq_clear)(struct ata_port *);
861
862 void (*bmdma_setup)(struct ata_queued_cmd *qc);
863 void (*bmdma_start)(struct ata_queued_cmd *qc);
864 void (*bmdma_stop)(struct ata_queued_cmd *qc);
865 u8 (*bmdma_status)(struct ata_port *ap);
866
867 void (*drain_fifo)(struct ata_queued_cmd *qc);
868 #endif /* CONFIG_ATA_SFF */
869
870 ssize_t (*em_show)(struct ata_port *ap, char *buf);
871 ssize_t (*em_store)(struct ata_port *ap, const char *message,
872 size_t size);
873 ssize_t (*sw_activity_show)(struct ata_device *dev, char *buf);
874 ssize_t (*sw_activity_store)(struct ata_device *dev,
875 enum sw_activity val);
876 /*
877 * Obsolete
878 */
879 void (*phy_reset)(struct ata_port *ap);
880 void (*eng_timeout)(struct ata_port *ap);
881
882 /*
883 * ->inherits must be the last field and all the preceding
884 * fields must be pointers.
885 */
886 const struct ata_port_operations *inherits;
887 };
888
889 struct ata_port_info {
890 unsigned long flags;
891 unsigned long link_flags;
892 unsigned long pio_mask;
893 unsigned long mwdma_mask;
894 unsigned long udma_mask;
895 struct ata_port_operations *port_ops;
896 void *private_data;
897 };
898
899 struct ata_timing {
900 unsigned short mode; /* ATA mode */
901 unsigned short setup; /* t1 */
902 unsigned short act8b; /* t2 for 8-bit I/O */
903 unsigned short rec8b; /* t2i for 8-bit I/O */
904 unsigned short cyc8b; /* t0 for 8-bit I/O */
905 unsigned short active; /* t2 or tD */
906 unsigned short recover; /* t2i or tK */
907 unsigned short dmack_hold; /* tj */
908 unsigned short cycle; /* t0 */
909 unsigned short udma; /* t2CYCTYP/2 */
910 };
911
912 /*
913 * Core layer - drivers/ata/libata-core.c
914 */
915 extern const unsigned long sata_deb_timing_normal[];
916 extern const unsigned long sata_deb_timing_hotplug[];
917 extern const unsigned long sata_deb_timing_long[];
918
919 extern struct ata_port_operations ata_dummy_port_ops;
920 extern const struct ata_port_info ata_dummy_port_info;
921
922 static inline const unsigned long *
923 sata_ehc_deb_timing(struct ata_eh_context *ehc)
924 {
925 if (ehc->i.flags & ATA_EHI_HOTPLUGGED)
926 return sata_deb_timing_hotplug;
927 else
928 return sata_deb_timing_normal;
929 }
930
931 static inline int ata_port_is_dummy(struct ata_port *ap)
932 {
933 return ap->ops == &ata_dummy_port_ops;
934 }
935
936 extern void ata_port_probe(struct ata_port *);
937 extern int sata_set_spd(struct ata_link *link);
938 extern int ata_std_prereset(struct ata_link *link, unsigned long deadline);
939 extern int ata_wait_after_reset(struct ata_link *link, unsigned long deadline,
940 int (*check_ready)(struct ata_link *link));
941 extern int sata_link_debounce(struct ata_link *link,
942 const unsigned long *params, unsigned long deadline);
943 extern int sata_link_resume(struct ata_link *link, const unsigned long *params,
944 unsigned long deadline);
945 extern int sata_link_hardreset(struct ata_link *link,
946 const unsigned long *timing, unsigned long deadline,
947 bool *online, int (*check_ready)(struct ata_link *));
948 extern int sata_std_hardreset(struct ata_link *link, unsigned int *class,
949 unsigned long deadline);
950 extern void ata_std_postreset(struct ata_link *link, unsigned int *classes);
951 extern void ata_port_disable(struct ata_port *);
952
953 extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports);
954 extern struct ata_host *ata_host_alloc_pinfo(struct device *dev,
955 const struct ata_port_info * const * ppi, int n_ports);
956 extern int ata_slave_link_init(struct ata_port *ap);
957 extern int ata_host_start(struct ata_host *host);
958 extern int ata_host_register(struct ata_host *host,
959 struct scsi_host_template *sht);
960 extern int ata_host_activate(struct ata_host *host, int irq,
961 irq_handler_t irq_handler, unsigned long irq_flags,
962 struct scsi_host_template *sht);
963 extern void ata_host_detach(struct ata_host *host);
964 extern void ata_host_init(struct ata_host *, struct device *,
965 unsigned long, struct ata_port_operations *);
966 extern int ata_scsi_detect(struct scsi_host_template *sht);
967 extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
968 extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *));
969 extern int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *dev,
970 int cmd, void __user *arg);
971 extern void ata_sas_port_destroy(struct ata_port *);
972 extern struct ata_port *ata_sas_port_alloc(struct ata_host *,
973 struct ata_port_info *, struct Scsi_Host *);
974 extern int ata_sas_port_init(struct ata_port *);
975 extern int ata_sas_port_start(struct ata_port *ap);
976 extern void ata_sas_port_stop(struct ata_port *ap);
977 extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *);
978 extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
979 struct ata_port *ap);
980 extern int sata_scr_valid(struct ata_link *link);
981 extern int sata_scr_read(struct ata_link *link, int reg, u32 *val);
982 extern int sata_scr_write(struct ata_link *link, int reg, u32 val);
983 extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val);
984 extern bool ata_link_online(struct ata_link *link);
985 extern bool ata_link_offline(struct ata_link *link);
986 #ifdef CONFIG_PM
987 extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg);
988 extern void ata_host_resume(struct ata_host *host);
989 #endif
990 extern int ata_ratelimit(void);
991 extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
992 unsigned long interval, unsigned long timeout);
993 extern int atapi_cmd_type(u8 opcode);
994 extern void ata_tf_to_fis(const struct ata_taskfile *tf,
995 u8 pmp, int is_cmd, u8 *fis);
996 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
997 extern unsigned long ata_pack_xfermask(unsigned long pio_mask,
998 unsigned long mwdma_mask, unsigned long udma_mask);
999 extern void ata_unpack_xfermask(unsigned long xfer_mask,
1000 unsigned long *pio_mask, unsigned long *mwdma_mask,
1001 unsigned long *udma_mask);
1002 extern u8 ata_xfer_mask2mode(unsigned long xfer_mask);
1003 extern unsigned long ata_xfer_mode2mask(u8 xfer_mode);
1004 extern int ata_xfer_mode2shift(unsigned long xfer_mode);
1005 extern const char *ata_mode_string(unsigned long xfer_mask);
1006 extern unsigned long ata_id_xfermask(const u16 *id);
1007 extern int ata_port_start(struct ata_port *ap);
1008 extern int ata_std_qc_defer(struct ata_queued_cmd *qc);
1009 extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
1010 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
1011 unsigned int n_elem);
1012 extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
1013 extern void ata_dev_disable(struct ata_device *adev);
1014 extern void ata_id_string(const u16 *id, unsigned char *s,
1015 unsigned int ofs, unsigned int len);
1016 extern void ata_id_c_string(const u16 *id, unsigned char *s,
1017 unsigned int ofs, unsigned int len);
1018 extern unsigned int ata_do_dev_read_id(struct ata_device *dev,
1019 struct ata_taskfile *tf, u16 *id);
1020 extern void ata_qc_complete(struct ata_queued_cmd *qc);
1021 extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active);
1022 extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
1023 void (*done)(struct scsi_cmnd *));
1024 extern int ata_std_bios_param(struct scsi_device *sdev,
1025 struct block_device *bdev,
1026 sector_t capacity, int geom[]);
1027 extern int ata_scsi_slave_config(struct scsi_device *sdev);
1028 extern void ata_scsi_slave_destroy(struct scsi_device *sdev);
1029 extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
1030 int queue_depth, int reason);
1031 extern struct ata_device *ata_dev_pair(struct ata_device *adev);
1032 extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev);
1033
1034 extern int ata_cable_40wire(struct ata_port *ap);
1035 extern int ata_cable_80wire(struct ata_port *ap);
1036 extern int ata_cable_sata(struct ata_port *ap);
1037 extern int ata_cable_ignore(struct ata_port *ap);
1038 extern int ata_cable_unknown(struct ata_port *ap);
1039
1040 extern void ata_pio_queue_task(struct ata_port *ap, void *data,
1041 unsigned long delay);
1042
1043 /* Timing helpers */
1044 extern unsigned int ata_pio_need_iordy(const struct ata_device *);
1045 extern const struct ata_timing *ata_timing_find_mode(u8 xfer_mode);
1046 extern int ata_timing_compute(struct ata_device *, unsigned short,
1047 struct ata_timing *, int, int);
1048 extern void ata_timing_merge(const struct ata_timing *,
1049 const struct ata_timing *, struct ata_timing *,
1050 unsigned int);
1051 extern u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle);
1052
1053 /* PCI */
1054 #ifdef CONFIG_PCI
1055 struct pci_dev;
1056
1057 struct pci_bits {
1058 unsigned int reg; /* PCI config register to read */
1059 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
1060 unsigned long mask;
1061 unsigned long val;
1062 };
1063
1064 extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
1065 extern void ata_pci_remove_one(struct pci_dev *pdev);
1066
1067 #ifdef CONFIG_PM
1068 extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg);
1069 extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev);
1070 extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
1071 extern int ata_pci_device_resume(struct pci_dev *pdev);
1072 #endif /* CONFIG_PM */
1073 #endif /* CONFIG_PCI */
1074
1075 /*
1076 * ACPI - drivers/ata/libata-acpi.c
1077 */
1078 #ifdef CONFIG_ATA_ACPI
1079 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
1080 {
1081 if (ap->pflags & ATA_PFLAG_INIT_GTM_VALID)
1082 return &ap->__acpi_init_gtm;
1083 return NULL;
1084 }
1085 int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm);
1086 int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *stm);
1087 unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev,
1088 const struct ata_acpi_gtm *gtm);
1089 int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm);
1090 #else
1091 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
1092 {
1093 return NULL;
1094 }
1095
1096 static inline int ata_acpi_stm(const struct ata_port *ap,
1097 struct ata_acpi_gtm *stm)
1098 {
1099 return -ENOSYS;
1100 }
1101
1102 static inline int ata_acpi_gtm(const struct ata_port *ap,
1103 struct ata_acpi_gtm *stm)
1104 {
1105 return -ENOSYS;
1106 }
1107
1108 static inline unsigned int ata_acpi_gtm_xfermask(struct ata_device *dev,
1109 const struct ata_acpi_gtm *gtm)
1110 {
1111 return 0;
1112 }
1113
1114 static inline int ata_acpi_cbl_80wire(struct ata_port *ap,
1115 const struct ata_acpi_gtm *gtm)
1116 {
1117 return 0;
1118 }
1119 #endif
1120
1121 /*
1122 * EH - drivers/ata/libata-eh.c
1123 */
1124 extern void ata_port_schedule_eh(struct ata_port *ap);
1125 extern int ata_link_abort(struct ata_link *link);
1126 extern int ata_port_abort(struct ata_port *ap);
1127 extern int ata_port_freeze(struct ata_port *ap);
1128 extern int sata_async_notification(struct ata_port *ap);
1129
1130 extern void ata_eh_freeze_port(struct ata_port *ap);
1131 extern void ata_eh_thaw_port(struct ata_port *ap);
1132
1133 extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
1134 extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
1135 extern void ata_eh_analyze_ncq_error(struct ata_link *link);
1136
1137 extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
1138 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
1139 ata_postreset_fn_t postreset);
1140 extern void ata_std_error_handler(struct ata_port *ap);
1141
1142 /*
1143 * Base operations to inherit from and initializers for sht
1144 *
1145 * Operations
1146 *
1147 * base : Common to all libata drivers.
1148 * sata : SATA controllers w/ native interface.
1149 * pmp : SATA controllers w/ PMP support.
1150 * sff : SFF ATA controllers w/o BMDMA support.
1151 * bmdma : SFF ATA controllers w/ BMDMA support.
1152 *
1153 * sht initializers
1154 *
1155 * BASE : Common to all libata drivers. The user must set
1156 * sg_tablesize and dma_boundary.
1157 * PIO : SFF ATA controllers w/ only PIO support.
1158 * BMDMA : SFF ATA controllers w/ BMDMA support. sg_tablesize and
1159 * dma_boundary are set to BMDMA limits.
1160 * NCQ : SATA controllers supporting NCQ. The user must set
1161 * sg_tablesize, dma_boundary and can_queue.
1162 */
1163 extern const struct ata_port_operations ata_base_port_ops;
1164 extern const struct ata_port_operations sata_port_ops;
1165 extern struct device_attribute *ata_common_sdev_attrs[];
1166
1167 #define ATA_BASE_SHT(drv_name) \
1168 .module = THIS_MODULE, \
1169 .name = drv_name, \
1170 .ioctl = ata_scsi_ioctl, \
1171 .queuecommand = ata_scsi_queuecmd, \
1172 .can_queue = ATA_DEF_QUEUE, \
1173 .this_id = ATA_SHT_THIS_ID, \
1174 .cmd_per_lun = ATA_SHT_CMD_PER_LUN, \
1175 .emulated = ATA_SHT_EMULATED, \
1176 .use_clustering = ATA_SHT_USE_CLUSTERING, \
1177 .proc_name = drv_name, \
1178 .slave_configure = ata_scsi_slave_config, \
1179 .slave_destroy = ata_scsi_slave_destroy, \
1180 .bios_param = ata_std_bios_param, \
1181 .sdev_attrs = ata_common_sdev_attrs
1182
1183 #define ATA_NCQ_SHT(drv_name) \
1184 ATA_BASE_SHT(drv_name), \
1185 .change_queue_depth = ata_scsi_change_queue_depth
1186
1187 /*
1188 * PMP helpers
1189 */
1190 #ifdef CONFIG_SATA_PMP
1191 static inline bool sata_pmp_supported(struct ata_port *ap)
1192 {
1193 return ap->flags & ATA_FLAG_PMP;
1194 }
1195
1196 static inline bool sata_pmp_attached(struct ata_port *ap)
1197 {
1198 return ap->nr_pmp_links != 0;
1199 }
1200
1201 static inline int ata_is_host_link(const struct ata_link *link)
1202 {
1203 return link == &link->ap->link || link == link->ap->slave_link;
1204 }
1205 #else /* CONFIG_SATA_PMP */
1206 static inline bool sata_pmp_supported(struct ata_port *ap)
1207 {
1208 return false;
1209 }
1210
1211 static inline bool sata_pmp_attached(struct ata_port *ap)
1212 {
1213 return false;
1214 }
1215
1216 static inline int ata_is_host_link(const struct ata_link *link)
1217 {
1218 return 1;
1219 }
1220 #endif /* CONFIG_SATA_PMP */
1221
1222 static inline int sata_srst_pmp(struct ata_link *link)
1223 {
1224 if (sata_pmp_supported(link->ap) && ata_is_host_link(link))
1225 return SATA_PMP_CTRL_PORT;
1226 return link->pmp;
1227 }
1228
1229 /*
1230 * printk helpers
1231 */
1232 #define ata_port_printk(ap, lv, fmt, args...) \
1233 printk("%sata%u: "fmt, lv, (ap)->print_id , ##args)
1234
1235 #define ata_link_printk(link, lv, fmt, args...) do { \
1236 if (sata_pmp_attached((link)->ap) || (link)->ap->slave_link) \
1237 printk("%sata%u.%02u: "fmt, lv, (link)->ap->print_id, \
1238 (link)->pmp , ##args); \
1239 else \
1240 printk("%sata%u: "fmt, lv, (link)->ap->print_id , ##args); \
1241 } while(0)
1242
1243 #define ata_dev_printk(dev, lv, fmt, args...) \
1244 printk("%sata%u.%02u: "fmt, lv, (dev)->link->ap->print_id, \
1245 (dev)->link->pmp + (dev)->devno , ##args)
1246
1247 /*
1248 * ata_eh_info helpers
1249 */
1250 extern void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...)
1251 __attribute__ ((format (printf, 2, 3)));
1252 extern void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...)
1253 __attribute__ ((format (printf, 2, 3)));
1254 extern void ata_ehi_clear_desc(struct ata_eh_info *ehi);
1255
1256 static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
1257 {
1258 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
1259 ehi->flags |= ATA_EHI_HOTPLUGGED;
1260 ehi->action |= ATA_EH_RESET | ATA_EH_ENABLE_LINK;
1261 ehi->err_mask |= AC_ERR_ATA_BUS;
1262 }
1263
1264 /*
1265 * port description helpers
1266 */
1267 extern void ata_port_desc(struct ata_port *ap, const char *fmt, ...)
1268 __attribute__ ((format (printf, 2, 3)));
1269 #ifdef CONFIG_PCI
1270 extern void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset,
1271 const char *name);
1272 #endif
1273
1274 static inline unsigned int ata_tag_valid(unsigned int tag)
1275 {
1276 return (tag < ATA_MAX_QUEUE) ? 1 : 0;
1277 }
1278
1279 static inline unsigned int ata_tag_internal(unsigned int tag)
1280 {
1281 return tag == ATA_TAG_INTERNAL;
1282 }
1283
1284 /*
1285 * device helpers
1286 */
1287 static inline unsigned int ata_class_enabled(unsigned int class)
1288 {
1289 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI ||
1290 class == ATA_DEV_PMP || class == ATA_DEV_SEMB;
1291 }
1292
1293 static inline unsigned int ata_class_disabled(unsigned int class)
1294 {
1295 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP ||
1296 class == ATA_DEV_PMP_UNSUP || class == ATA_DEV_SEMB_UNSUP;
1297 }
1298
1299 static inline unsigned int ata_class_absent(unsigned int class)
1300 {
1301 return !ata_class_enabled(class) && !ata_class_disabled(class);
1302 }
1303
1304 static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
1305 {
1306 return ata_class_enabled(dev->class);
1307 }
1308
1309 static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
1310 {
1311 return ata_class_disabled(dev->class);
1312 }
1313
1314 static inline unsigned int ata_dev_absent(const struct ata_device *dev)
1315 {
1316 return ata_class_absent(dev->class);
1317 }
1318
1319 /*
1320 * link helpers
1321 */
1322 static inline int ata_link_max_devices(const struct ata_link *link)
1323 {
1324 if (ata_is_host_link(link) && link->ap->flags & ATA_FLAG_SLAVE_POSS)
1325 return 2;
1326 return 1;
1327 }
1328
1329 static inline int ata_link_active(struct ata_link *link)
1330 {
1331 return ata_tag_valid(link->active_tag) || link->sactive;
1332 }
1333
1334 /*
1335 * Iterators
1336 *
1337 * ATA_LITER_* constants are used to select link iteration mode and
1338 * ATA_DITER_* device iteration mode.
1339 *
1340 * For a custom iteration directly using ata_{link|dev}_next(), if
1341 * @link or @dev, respectively, is NULL, the first element is
1342 * returned. @dev and @link can be any valid device or link and the
1343 * next element according to the iteration mode will be returned.
1344 * After the last element, NULL is returned.
1345 */
1346 enum ata_link_iter_mode {
1347 ATA_LITER_EDGE, /* if present, PMP links only; otherwise,
1348 * host link. no slave link */
1349 ATA_LITER_HOST_FIRST, /* host link followed by PMP or slave links */
1350 ATA_LITER_PMP_FIRST, /* PMP links followed by host link,
1351 * slave link still comes after host link */
1352 };
1353
1354 enum ata_dev_iter_mode {
1355 ATA_DITER_ENABLED,
1356 ATA_DITER_ENABLED_REVERSE,
1357 ATA_DITER_ALL,
1358 ATA_DITER_ALL_REVERSE,
1359 };
1360
1361 extern struct ata_link *ata_link_next(struct ata_link *link,
1362 struct ata_port *ap,
1363 enum ata_link_iter_mode mode);
1364
1365 extern struct ata_device *ata_dev_next(struct ata_device *dev,
1366 struct ata_link *link,
1367 enum ata_dev_iter_mode mode);
1368
1369 /*
1370 * Shortcut notation for iterations
1371 *
1372 * ata_for_each_link() iterates over each link of @ap according to
1373 * @mode. @link points to the current link in the loop. @link is
1374 * NULL after loop termination. ata_for_each_dev() works the same way
1375 * except that it iterates over each device of @link.
1376 *
1377 * Note that the mode prefixes ATA_{L|D}ITER_ shouldn't need to be
1378 * specified when using the following shorthand notations. Only the
1379 * mode itself (EDGE, HOST_FIRST, ENABLED, etc...) should be
1380 * specified. This not only increases brevity but also makes it
1381 * impossible to use ATA_LITER_* for device iteration or vice-versa.
1382 */
1383 #define ata_for_each_link(link, ap, mode) \
1384 for ((link) = ata_link_next(NULL, (ap), ATA_LITER_##mode); (link); \
1385 (link) = ata_link_next((link), (ap), ATA_LITER_##mode))
1386
1387 #define ata_for_each_dev(dev, link, mode) \
1388 for ((dev) = ata_dev_next(NULL, (link), ATA_DITER_##mode); (dev); \
1389 (dev) = ata_dev_next((dev), (link), ATA_DITER_##mode))
1390
1391 /**
1392 * ata_ncq_enabled - Test whether NCQ is enabled
1393 * @dev: ATA device to test for
1394 *
1395 * LOCKING:
1396 * spin_lock_irqsave(host lock)
1397 *
1398 * RETURNS:
1399 * 1 if NCQ is enabled for @dev, 0 otherwise.
1400 */
1401 static inline int ata_ncq_enabled(struct ata_device *dev)
1402 {
1403 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF |
1404 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ;
1405 }
1406
1407 static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
1408 {
1409 qc->tf.ctl |= ATA_NIEN;
1410 }
1411
1412 static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap,
1413 unsigned int tag)
1414 {
1415 if (likely(ata_tag_valid(tag)))
1416 return &ap->qcmd[tag];
1417 return NULL;
1418 }
1419
1420 static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap,
1421 unsigned int tag)
1422 {
1423 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
1424
1425 if (unlikely(!qc) || !ap->ops->error_handler)
1426 return qc;
1427
1428 if ((qc->flags & (ATA_QCFLAG_ACTIVE |
1429 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE)
1430 return qc;
1431
1432 return NULL;
1433 }
1434
1435 static inline unsigned int ata_qc_raw_nbytes(struct ata_queued_cmd *qc)
1436 {
1437 return qc->nbytes - min(qc->extrabytes, qc->nbytes);
1438 }
1439
1440 static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
1441 {
1442 memset(tf, 0, sizeof(*tf));
1443
1444 tf->ctl = dev->link->ap->ctl;
1445 if (dev->devno == 0)
1446 tf->device = ATA_DEVICE_OBS;
1447 else
1448 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
1449 }
1450
1451 static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
1452 {
1453 qc->dma_dir = DMA_NONE;
1454 qc->sg = NULL;
1455 qc->flags = 0;
1456 qc->cursg = NULL;
1457 qc->cursg_ofs = 0;
1458 qc->nbytes = qc->extrabytes = qc->curbytes = 0;
1459 qc->n_elem = 0;
1460 qc->err_mask = 0;
1461 qc->sect_size = ATA_SECT_SIZE;
1462
1463 ata_tf_init(qc->dev, &qc->tf);
1464
1465 /* init result_tf such that it indicates normal completion */
1466 qc->result_tf.command = ATA_DRDY;
1467 qc->result_tf.feature = 0;
1468 }
1469
1470 static inline int ata_try_flush_cache(const struct ata_device *dev)
1471 {
1472 return ata_id_wcache_enabled(dev->id) ||
1473 ata_id_has_flush(dev->id) ||
1474 ata_id_has_flush_ext(dev->id);
1475 }
1476
1477 static inline unsigned int ac_err_mask(u8 status)
1478 {
1479 if (status & (ATA_BUSY | ATA_DRQ))
1480 return AC_ERR_HSM;
1481 if (status & (ATA_ERR | ATA_DF))
1482 return AC_ERR_DEV;
1483 return 0;
1484 }
1485
1486 static inline unsigned int __ac_err_mask(u8 status)
1487 {
1488 unsigned int mask = ac_err_mask(status);
1489 if (mask == 0)
1490 return AC_ERR_OTHER;
1491 return mask;
1492 }
1493
1494 static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
1495 {
1496 return *(struct ata_port **)&host->hostdata[0];
1497 }
1498
1499 static inline int ata_check_ready(u8 status)
1500 {
1501 if (!(status & ATA_BUSY))
1502 return 1;
1503
1504 /* 0xff indicates either no device or device not ready */
1505 if (status == 0xff)
1506 return -ENODEV;
1507
1508 return 0;
1509 }
1510
1511 static inline unsigned long ata_deadline(unsigned long from_jiffies,
1512 unsigned long timeout_msecs)
1513 {
1514 return from_jiffies + msecs_to_jiffies(timeout_msecs);
1515 }
1516
1517 /* Don't open code these in drivers as there are traps. Firstly the range may
1518 change in future hardware and specs, secondly 0xFF means 'no DMA' but is
1519 > UDMA_0. Dyma ddreigiau */
1520
1521 static inline int ata_using_mwdma(struct ata_device *adev)
1522 {
1523 if (adev->dma_mode >= XFER_MW_DMA_0 && adev->dma_mode <= XFER_MW_DMA_4)
1524 return 1;
1525 return 0;
1526 }
1527
1528 static inline int ata_using_udma(struct ata_device *adev)
1529 {
1530 if (adev->dma_mode >= XFER_UDMA_0 && adev->dma_mode <= XFER_UDMA_7)
1531 return 1;
1532 return 0;
1533 }
1534
1535 static inline int ata_dma_enabled(struct ata_device *adev)
1536 {
1537 return (adev->dma_mode == 0xFF ? 0 : 1);
1538 }
1539
1540 /**************************************************************************
1541 * PMP - drivers/ata/libata-pmp.c
1542 */
1543 #ifdef CONFIG_SATA_PMP
1544
1545 extern const struct ata_port_operations sata_pmp_port_ops;
1546
1547 extern int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc);
1548 extern void sata_pmp_error_handler(struct ata_port *ap);
1549
1550 #else /* CONFIG_SATA_PMP */
1551
1552 #define sata_pmp_port_ops sata_port_ops
1553 #define sata_pmp_qc_defer_cmd_switch ata_std_qc_defer
1554 #define sata_pmp_error_handler ata_std_error_handler
1555
1556 #endif /* CONFIG_SATA_PMP */
1557
1558
1559 /**************************************************************************
1560 * SFF - drivers/ata/libata-sff.c
1561 */
1562 #ifdef CONFIG_ATA_SFF
1563
1564 extern const struct ata_port_operations ata_sff_port_ops;
1565 extern const struct ata_port_operations ata_bmdma_port_ops;
1566 extern const struct ata_port_operations ata_bmdma32_port_ops;
1567
1568 /* PIO only, sg_tablesize and dma_boundary limits can be removed */
1569 #define ATA_PIO_SHT(drv_name) \
1570 ATA_BASE_SHT(drv_name), \
1571 .sg_tablesize = LIBATA_MAX_PRD, \
1572 .dma_boundary = ATA_DMA_BOUNDARY
1573
1574 #define ATA_BMDMA_SHT(drv_name) \
1575 ATA_BASE_SHT(drv_name), \
1576 .sg_tablesize = LIBATA_MAX_PRD, \
1577 .dma_boundary = ATA_DMA_BOUNDARY
1578
1579 extern void ata_sff_qc_prep(struct ata_queued_cmd *qc);
1580 extern void ata_sff_dumb_qc_prep(struct ata_queued_cmd *qc);
1581 extern void ata_sff_dev_select(struct ata_port *ap, unsigned int device);
1582 extern u8 ata_sff_check_status(struct ata_port *ap);
1583 extern void ata_sff_pause(struct ata_port *ap);
1584 extern void ata_sff_dma_pause(struct ata_port *ap);
1585 extern int ata_sff_busy_sleep(struct ata_port *ap,
1586 unsigned long timeout_pat, unsigned long timeout);
1587 extern int ata_sff_wait_ready(struct ata_link *link, unsigned long deadline);
1588 extern void ata_sff_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
1589 extern void ata_sff_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
1590 extern void ata_sff_exec_command(struct ata_port *ap,
1591 const struct ata_taskfile *tf);
1592 extern unsigned int ata_sff_data_xfer(struct ata_device *dev,
1593 unsigned char *buf, unsigned int buflen, int rw);
1594 extern unsigned int ata_sff_data_xfer32(struct ata_device *dev,
1595 unsigned char *buf, unsigned int buflen, int rw);
1596 extern unsigned int ata_sff_data_xfer_noirq(struct ata_device *dev,
1597 unsigned char *buf, unsigned int buflen, int rw);
1598 extern u8 ata_sff_irq_on(struct ata_port *ap);
1599 extern void ata_sff_irq_clear(struct ata_port *ap);
1600 extern int ata_sff_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
1601 u8 status, int in_wq);
1602 extern unsigned int ata_sff_qc_issue(struct ata_queued_cmd *qc);
1603 extern bool ata_sff_qc_fill_rtf(struct ata_queued_cmd *qc);
1604 extern unsigned int ata_sff_host_intr(struct ata_port *ap,
1605 struct ata_queued_cmd *qc);
1606 extern irqreturn_t ata_sff_interrupt(int irq, void *dev_instance);
1607 extern void ata_sff_lost_interrupt(struct ata_port *ap);
1608 extern void ata_sff_freeze(struct ata_port *ap);
1609 extern void ata_sff_thaw(struct ata_port *ap);
1610 extern int ata_sff_prereset(struct ata_link *link, unsigned long deadline);
1611 extern unsigned int ata_sff_dev_classify(struct ata_device *dev, int present,
1612 u8 *r_err);
1613 extern int ata_sff_wait_after_reset(struct ata_link *link, unsigned int devmask,
1614 unsigned long deadline);
1615 extern int ata_sff_softreset(struct ata_link *link, unsigned int *classes,
1616 unsigned long deadline);
1617 extern int sata_sff_hardreset(struct ata_link *link, unsigned int *class,
1618 unsigned long deadline);
1619 extern void ata_sff_postreset(struct ata_link *link, unsigned int *classes);
1620 extern void ata_sff_drain_fifo(struct ata_queued_cmd *qc);
1621 extern void ata_sff_error_handler(struct ata_port *ap);
1622 extern void ata_sff_post_internal_cmd(struct ata_queued_cmd *qc);
1623 extern int ata_sff_port_start(struct ata_port *ap);
1624 extern int ata_sff_port_start32(struct ata_port *ap);
1625 extern void ata_sff_std_ports(struct ata_ioports *ioaddr);
1626 extern unsigned long ata_bmdma_mode_filter(struct ata_device *dev,
1627 unsigned long xfer_mask);
1628 extern void ata_bmdma_setup(struct ata_queued_cmd *qc);
1629 extern void ata_bmdma_start(struct ata_queued_cmd *qc);
1630 extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
1631 extern u8 ata_bmdma_status(struct ata_port *ap);
1632 extern void ata_bus_reset(struct ata_port *ap);
1633
1634 #ifdef CONFIG_PCI
1635 extern int ata_pci_bmdma_clear_simplex(struct pci_dev *pdev);
1636 extern int ata_pci_bmdma_init(struct ata_host *host);
1637 extern int ata_pci_sff_init_host(struct ata_host *host);
1638 extern int ata_pci_sff_prepare_host(struct pci_dev *pdev,
1639 const struct ata_port_info * const * ppi,
1640 struct ata_host **r_host);
1641 extern int ata_pci_sff_activate_host(struct ata_host *host,
1642 irq_handler_t irq_handler,
1643 struct scsi_host_template *sht);
1644 extern int ata_pci_sff_init_one(struct pci_dev *pdev,
1645 const struct ata_port_info * const * ppi,
1646 struct scsi_host_template *sht, void *host_priv);
1647 #endif /* CONFIG_PCI */
1648
1649 /**
1650 * ata_sff_busy_wait - Wait for a port status register
1651 * @ap: Port to wait for.
1652 * @bits: bits that must be clear
1653 * @max: number of 10uS waits to perform
1654 *
1655 * Waits up to max*10 microseconds for the selected bits in the port's
1656 * status register to be cleared.
1657 * Returns final value of status register.
1658 *
1659 * LOCKING:
1660 * Inherited from caller.
1661 */
1662 static inline u8 ata_sff_busy_wait(struct ata_port *ap, unsigned int bits,
1663 unsigned int max)
1664 {
1665 u8 status;
1666
1667 do {
1668 udelay(10);
1669 status = ap->ops->sff_check_status(ap);
1670 max--;
1671 } while (status != 0xff && (status & bits) && (max > 0));
1672
1673 return status;
1674 }
1675
1676 /**
1677 * ata_wait_idle - Wait for a port to be idle.
1678 * @ap: Port to wait for.
1679 *
1680 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
1681 * Returns final value of status register.
1682 *
1683 * LOCKING:
1684 * Inherited from caller.
1685 */
1686 static inline u8 ata_wait_idle(struct ata_port *ap)
1687 {
1688 u8 status = ata_sff_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
1689
1690 #ifdef ATA_DEBUG
1691 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ)))
1692 ata_port_printk(ap, KERN_DEBUG, "abnormal Status 0x%X\n",
1693 status);
1694 #endif
1695
1696 return status;
1697 }
1698 #endif /* CONFIG_ATA_SFF */
1699
1700 #endif /* __LINUX_LIBATA_H__ */
linux 2.6 git repository for openrd