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mm-only debug patch...
[mmotm.git] / include / linux / libata.h
blob87698640c091e1d91379ea01050242ec884645da
1 /*
2 * Copyright 2003-2005 Red Hat, Inc. All rights reserved.
3 * Copyright 2003-2005 Jeff Garzik
4 *
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2, or (at your option)
9 * any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; see the file COPYING. If not, write to
18 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
19 *
20 *
21 * libata documentation is available via 'make {ps|pdf}docs',
22 * as Documentation/DocBook/libata.*
23 *
24 */
25
26 #ifndef __LINUX_LIBATA_H__
27 #define __LINUX_LIBATA_H__
28
29 #include <linux/delay.h>
30 #include <linux/jiffies.h>
31 #include <linux/interrupt.h>
32 #include <linux/dma-mapping.h>
33 #include <linux/scatterlist.h>
34 #include <linux/io.h>
35 #include <linux/ata.h>
36 #include <linux/workqueue.h>
37 #include <scsi/scsi_host.h>
38 #include <linux/acpi.h>
39 #include <linux/cdrom.h>
40
41 /*
42 * Define if arch has non-standard setup. This is a _PCI_ standard
43 * not a legacy or ISA standard.
44 */
45 #ifdef CONFIG_ATA_NONSTANDARD
46 #include <asm/libata-portmap.h>
47 #else
48 #include <asm-generic/libata-portmap.h>
49 #endif
50
51 /*
52 * compile-time options: to be removed as soon as all the drivers are
53 * converted to the new debugging mechanism
54 */
55 #undef ATA_DEBUG /* debugging output */
56 #undef ATA_VERBOSE_DEBUG /* yet more debugging output */
57 #undef ATA_IRQ_TRAP /* define to ack screaming irqs */
58 #undef ATA_NDEBUG /* define to disable quick runtime checks */
59
60
61 /* note: prints function name for you */
62 #ifdef ATA_DEBUG
63 #define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args)
64 #ifdef ATA_VERBOSE_DEBUG
65 #define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args)
66 #else
67 #define VPRINTK(fmt, args...)
68 #endif /* ATA_VERBOSE_DEBUG */
69 #else
70 #define DPRINTK(fmt, args...)
71 #define VPRINTK(fmt, args...)
72 #endif /* ATA_DEBUG */
73
74 #define BPRINTK(fmt, args...) if (ap->flags & ATA_FLAG_DEBUGMSG) printk(KERN_ERR "%s: " fmt, __func__, ## args)
75
76 /* NEW: debug levels */
77 #define HAVE_LIBATA_MSG 1
78
79 enum {
80 ATA_MSG_DRV = 0x0001,
81 ATA_MSG_INFO = 0x0002,
82 ATA_MSG_PROBE = 0x0004,
83 ATA_MSG_WARN = 0x0008,
84 ATA_MSG_MALLOC = 0x0010,
85 ATA_MSG_CTL = 0x0020,
86 ATA_MSG_INTR = 0x0040,
87 ATA_MSG_ERR = 0x0080,
88 };
89
90 #define ata_msg_drv(p) ((p)->msg_enable & ATA_MSG_DRV)
91 #define ata_msg_info(p) ((p)->msg_enable & ATA_MSG_INFO)
92 #define ata_msg_probe(p) ((p)->msg_enable & ATA_MSG_PROBE)
93 #define ata_msg_warn(p) ((p)->msg_enable & ATA_MSG_WARN)
94 #define ata_msg_malloc(p) ((p)->msg_enable & ATA_MSG_MALLOC)
95 #define ata_msg_ctl(p) ((p)->msg_enable & ATA_MSG_CTL)
96 #define ata_msg_intr(p) ((p)->msg_enable & ATA_MSG_INTR)
97 #define ata_msg_err(p) ((p)->msg_enable & ATA_MSG_ERR)
98
99 static inline u32 ata_msg_init(int dval, int default_msg_enable_bits)
100 {
101 if (dval < 0 || dval >= (sizeof(u32) * 8))
102 return default_msg_enable_bits; /* should be 0x1 - only driver info msgs */
103 if (!dval)
104 return 0;
105 return (1 << dval) - 1;
106 }
107
108 /* defines only for the constants which don't work well as enums */
109 #define ATA_TAG_POISON 0xfafbfcfdU
110
111 enum {
112 /* various global constants */
113 LIBATA_MAX_PRD = ATA_MAX_PRD / 2,
114 LIBATA_DUMB_MAX_PRD = ATA_MAX_PRD / 4, /* Worst case */
115 ATA_DEF_QUEUE = 1,
116 /* tag ATA_MAX_QUEUE - 1 is reserved for internal commands */
117 ATA_MAX_QUEUE = 32,
118 ATA_TAG_INTERNAL = ATA_MAX_QUEUE - 1,
119 ATA_SHORT_PAUSE = 16,
120
121 ATAPI_MAX_DRAIN = 16 << 10,
122
123 ATA_ALL_DEVICES = (1 << ATA_MAX_DEVICES) - 1,
124
125 ATA_SHT_EMULATED = 1,
126 ATA_SHT_CMD_PER_LUN = 1,
127 ATA_SHT_THIS_ID = -1,
128 ATA_SHT_USE_CLUSTERING = 1,
129
130 /* struct ata_device stuff */
131 ATA_DFLAG_LBA = (1 << 0), /* device supports LBA */
132 ATA_DFLAG_LBA48 = (1 << 1), /* device supports LBA48 */
133 ATA_DFLAG_CDB_INTR = (1 << 2), /* device asserts INTRQ when ready for CDB */
134 ATA_DFLAG_NCQ = (1 << 3), /* device supports NCQ */
135 ATA_DFLAG_FLUSH_EXT = (1 << 4), /* do FLUSH_EXT instead of FLUSH */
136 ATA_DFLAG_ACPI_PENDING = (1 << 5), /* ACPI resume action pending */
137 ATA_DFLAG_ACPI_FAILED = (1 << 6), /* ACPI on devcfg has failed */
138 ATA_DFLAG_AN = (1 << 7), /* AN configured */
139 ATA_DFLAG_HIPM = (1 << 8), /* device supports HIPM */
140 ATA_DFLAG_DIPM = (1 << 9), /* device supports DIPM */
141 ATA_DFLAG_DMADIR = (1 << 10), /* device requires DMADIR */
142 ATA_DFLAG_CFG_MASK = (1 << 12) - 1,
143
144 ATA_DFLAG_PIO = (1 << 12), /* device limited to PIO mode */
145 ATA_DFLAG_NCQ_OFF = (1 << 13), /* device limited to non-NCQ mode */
146 ATA_DFLAG_SLEEPING = (1 << 15), /* device is sleeping */
147 ATA_DFLAG_DUBIOUS_XFER = (1 << 16), /* data transfer not verified */
148 ATA_DFLAG_NO_UNLOAD = (1 << 17), /* device doesn't support unload */
149 ATA_DFLAG_INIT_MASK = (1 << 24) - 1,
150
151 ATA_DFLAG_DETACH = (1 << 24),
152 ATA_DFLAG_DETACHED = (1 << 25),
153
154 ATA_DEV_UNKNOWN = 0, /* unknown device */
155 ATA_DEV_ATA = 1, /* ATA device */
156 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */
157 ATA_DEV_ATAPI = 3, /* ATAPI device */
158 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */
159 ATA_DEV_PMP = 5, /* SATA port multiplier */
160 ATA_DEV_PMP_UNSUP = 6, /* SATA port multiplier (unsupported) */
161 ATA_DEV_SEMB = 7, /* SEMB */
162 ATA_DEV_SEMB_UNSUP = 8, /* SEMB (unsupported) */
163 ATA_DEV_NONE = 9, /* no device */
164
165 /* struct ata_link flags */
166 ATA_LFLAG_NO_HRST = (1 << 1), /* avoid hardreset */
167 ATA_LFLAG_NO_SRST = (1 << 2), /* avoid softreset */
168 ATA_LFLAG_ASSUME_ATA = (1 << 3), /* assume ATA class */
169 ATA_LFLAG_ASSUME_SEMB = (1 << 4), /* assume SEMB class */
170 ATA_LFLAG_ASSUME_CLASS = ATA_LFLAG_ASSUME_ATA | ATA_LFLAG_ASSUME_SEMB,
171 ATA_LFLAG_NO_RETRY = (1 << 5), /* don't retry this link */
172 ATA_LFLAG_DISABLED = (1 << 6), /* link is disabled */
173 ATA_LFLAG_SW_ACTIVITY = (1 << 7), /* keep activity stats */
174
175 /* struct ata_port flags */
176 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */
177 /* (doesn't imply presence) */
178 ATA_FLAG_SATA = (1 << 1),
179 ATA_FLAG_NO_LEGACY = (1 << 2), /* no legacy mode check */
180 ATA_FLAG_MMIO = (1 << 3), /* use MMIO, not PIO */
181 ATA_FLAG_SRST = (1 << 4), /* (obsolete) use ATA SRST, not E.D.D. */
182 ATA_FLAG_SATA_RESET = (1 << 5), /* (obsolete) use COMRESET */
183 ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */
184 ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */
185 ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */
186 ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD
187 * doesn't handle PIO interrupts */
188 ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */
189 ATA_FLAG_NO_POWEROFF_SPINDOWN = (1 << 11), /* don't spindown before poweroff */
190 ATA_FLAG_NO_HIBERNATE_SPINDOWN = (1 << 12), /* don't spindown before hibernation */
191 ATA_FLAG_DEBUGMSG = (1 << 13),
192 ATA_FLAG_FPDMA_AA = (1 << 14), /* driver supports Auto-Activate */
193 ATA_FLAG_IGN_SIMPLEX = (1 << 15), /* ignore SIMPLEX */
194 ATA_FLAG_NO_IORDY = (1 << 16), /* controller lacks iordy */
195 ATA_FLAG_ACPI_SATA = (1 << 17), /* need native SATA ACPI layout */
196 ATA_FLAG_AN = (1 << 18), /* controller supports AN */
197 ATA_FLAG_PMP = (1 << 19), /* controller supports PMP */
198 ATA_FLAG_IPM = (1 << 20), /* driver can handle IPM */
199 ATA_FLAG_EM = (1 << 21), /* driver supports enclosure
200 * management */
201 ATA_FLAG_SW_ACTIVITY = (1 << 22), /* driver supports sw activity
202 * led */
203
204 /* The following flag belongs to ap->pflags but is kept in
205 * ap->flags because it's referenced in many LLDs and will be
206 * removed in not-too-distant future.
207 */
208 ATA_FLAG_DISABLED = (1 << 23), /* port is disabled, ignore it */
209
210 /* bits 24:31 of ap->flags are reserved for LLD specific flags */
211
212
213 /* struct ata_port pflags */
214 ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */
215 ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */
216 ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */
217 ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */
218 ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */
219 ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */
220 ATA_PFLAG_INITIALIZING = (1 << 7), /* being initialized, don't touch */
221 ATA_PFLAG_RESETTING = (1 << 8), /* reset in progress */
222 ATA_PFLAG_UNLOADING = (1 << 9), /* driver is being unloaded */
223 ATA_PFLAG_UNLOADED = (1 << 10), /* driver is unloaded */
224
225 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */
226 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */
227 ATA_PFLAG_INIT_GTM_VALID = (1 << 19), /* initial gtm data valid */
228
229 ATA_PFLAG_PIO32 = (1 << 20), /* 32bit PIO */
230 ATA_PFLAG_PIO32CHANGE = (1 << 21), /* 32bit PIO can be turned on/off */
231
232 /* struct ata_queued_cmd flags */
233 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */
234 ATA_QCFLAG_DMAMAP = (1 << 1), /* SG table is DMA mapped */
235 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */
236 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */
237 ATA_QCFLAG_CLEAR_EXCL = (1 << 5), /* clear excl_link on completion */
238 ATA_QCFLAG_QUIET = (1 << 6), /* don't report device error */
239 ATA_QCFLAG_RETRY = (1 << 7), /* retry after failure */
240
241 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */
242 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */
243 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */
244
245 /* host set flags */
246 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */
247 ATA_HOST_STARTED = (1 << 1), /* Host started */
248 ATA_HOST_PARALLEL_SCAN = (1 << 2), /* Ports on this host can be scanned in parallel */
249
250 /* bits 24:31 of host->flags are reserved for LLD specific flags */
251
252 /* various lengths of time */
253 ATA_TMOUT_BOOT = 30000, /* heuristic */
254 ATA_TMOUT_BOOT_QUICK = 7000, /* heuristic */
255 ATA_TMOUT_INTERNAL_QUICK = 5000,
256 ATA_TMOUT_MAX_PARK = 30000,
257
258 /* FIXME: GoVault needs 2s but we can't afford that without
259 * parallel probing. 800ms is enough for iVDR disk
260 * HHD424020F7SV00. Increase to 2secs when parallel probing
261 * is in place.
262 */
263 ATA_TMOUT_FF_WAIT = 800,
264
265 /* Spec mandates to wait for ">= 2ms" before checking status
266 * after reset. We wait 150ms, because that was the magic
267 * delay used for ATAPI devices in Hale Landis's ATADRVR, for
268 * the period of time between when the ATA command register is
269 * written, and then status is checked. Because waiting for
270 * "a while" before checking status is fine, post SRST, we
271 * perform this magic delay here as well.
272 *
273 * Old drivers/ide uses the 2mS rule and then waits for ready.
274 */
275 ATA_WAIT_AFTER_RESET = 150,
276
277 /* If PMP is supported, we have to do follow-up SRST. As some
278 * PMPs don't send D2H Reg FIS after hardreset, LLDs are
279 * advised to wait only for the following duration before
280 * doing SRST.
281 */
282 ATA_TMOUT_PMP_SRST_WAIT = 5000,
283
284 /* ATA bus states */
285 BUS_UNKNOWN = 0,
286 BUS_DMA = 1,
287 BUS_IDLE = 2,
288 BUS_NOINTR = 3,
289 BUS_NODATA = 4,
290 BUS_TIMER = 5,
291 BUS_PIO = 6,
292 BUS_EDD = 7,
293 BUS_IDENTIFY = 8,
294 BUS_PACKET = 9,
295
296 /* SATA port states */
297 PORT_UNKNOWN = 0,
298 PORT_ENABLED = 1,
299 PORT_DISABLED = 2,
300
301 /* encoding various smaller bitmaps into a single
302 * unsigned long bitmap
303 */
304 ATA_NR_PIO_MODES = 7,
305 ATA_NR_MWDMA_MODES = 5,
306 ATA_NR_UDMA_MODES = 8,
307
308 ATA_SHIFT_PIO = 0,
309 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_NR_PIO_MODES,
310 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_NR_MWDMA_MODES,
311
312 /* size of buffer to pad xfers ending on unaligned boundaries */
313 ATA_DMA_PAD_SZ = 4,
314
315 /* ering size */
316 ATA_ERING_SIZE = 32,
317
318 /* return values for ->qc_defer */
319 ATA_DEFER_LINK = 1,
320 ATA_DEFER_PORT = 2,
321
322 /* desc_len for ata_eh_info and context */
323 ATA_EH_DESC_LEN = 80,
324
325 /* reset / recovery action types */
326 ATA_EH_REVALIDATE = (1 << 0),
327 ATA_EH_SOFTRESET = (1 << 1), /* meaningful only in ->prereset */
328 ATA_EH_HARDRESET = (1 << 2), /* meaningful only in ->prereset */
329 ATA_EH_RESET = ATA_EH_SOFTRESET | ATA_EH_HARDRESET,
330 ATA_EH_ENABLE_LINK = (1 << 3),
331 ATA_EH_LPM = (1 << 4), /* link power management action */
332 ATA_EH_PARK = (1 << 5), /* unload heads and stop I/O */
333
334 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE | ATA_EH_PARK,
335 ATA_EH_ALL_ACTIONS = ATA_EH_REVALIDATE | ATA_EH_RESET |
336 ATA_EH_ENABLE_LINK | ATA_EH_LPM,
337
338 /* ata_eh_info->flags */
339 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */
340 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */
341 ATA_EHI_QUIET = (1 << 3), /* be quiet */
342
343 ATA_EHI_DID_SOFTRESET = (1 << 16), /* already soft-reset this port */
344 ATA_EHI_DID_HARDRESET = (1 << 17), /* already soft-reset this port */
345 ATA_EHI_PRINTINFO = (1 << 18), /* print configuration info */
346 ATA_EHI_SETMODE = (1 << 19), /* configure transfer mode */
347 ATA_EHI_POST_SETMODE = (1 << 20), /* revaildating after setmode */
348
349 ATA_EHI_DID_RESET = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET,
350
351 /* mask of flags to transfer *to* the slave link */
352 ATA_EHI_TO_SLAVE_MASK = ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET,
353
354 /* max tries if error condition is still set after ->error_handler */
355 ATA_EH_MAX_TRIES = 5,
356
357 /* how hard are we gonna try to probe/recover devices */
358 ATA_PROBE_MAX_TRIES = 3,
359 ATA_EH_DEV_TRIES = 3,
360 ATA_EH_PMP_TRIES = 5,
361 ATA_EH_PMP_LINK_TRIES = 3,
362
363 SATA_PMP_RW_TIMEOUT = 3000, /* PMP read/write timeout */
364
365 /* This should match the actual table size of
366 * ata_eh_cmd_timeout_table in libata-eh.c.
367 */
368 ATA_EH_CMD_TIMEOUT_TABLE_SIZE = 5,
369
370 /* Horkage types. May be set by libata or controller on drives
371 (some horkage may be drive/controller pair dependant */
372
373 ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */
374 ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */
375 ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */
376 ATA_HORKAGE_MAX_SEC_128 = (1 << 3), /* Limit max sects to 128 */
377 ATA_HORKAGE_BROKEN_HPA = (1 << 4), /* Broken HPA */
378 ATA_HORKAGE_DISABLE = (1 << 5), /* Disable it */
379 ATA_HORKAGE_HPA_SIZE = (1 << 6), /* native size off by one */
380 ATA_HORKAGE_IPM = (1 << 7), /* Link PM problems */
381 ATA_HORKAGE_IVB = (1 << 8), /* cbl det validity bit bugs */
382 ATA_HORKAGE_STUCK_ERR = (1 << 9), /* stuck ERR on next PACKET */
383 ATA_HORKAGE_BRIDGE_OK = (1 << 10), /* no bridge limits */
384 ATA_HORKAGE_ATAPI_MOD16_DMA = (1 << 11), /* use ATAPI DMA for commands
385 not multiple of 16 bytes */
386 ATA_HORKAGE_FIRMWARE_WARN = (1 << 12), /* firmware update warning */
387 ATA_HORKAGE_1_5_GBPS = (1 << 13), /* force 1.5 Gbps */
388 ATA_HORKAGE_NOSETXFER = (1 << 14), /* skip SETXFER, SATA only */
389 ATA_HORKAGE_BROKEN_FPDMA_AA = (1 << 15), /* skip AA */
390
391 /* DMA mask for user DMA control: User visible values; DO NOT
392 renumber */
393 ATA_DMA_MASK_ATA = (1 << 0), /* DMA on ATA Disk */
394 ATA_DMA_MASK_ATAPI = (1 << 1), /* DMA on ATAPI */
395 ATA_DMA_MASK_CFA = (1 << 2), /* DMA on CF Card */
396
397 /* ATAPI command types */
398 ATAPI_READ = 0, /* READs */
399 ATAPI_WRITE = 1, /* WRITEs */
400 ATAPI_READ_CD = 2, /* READ CD [MSF] */
401 ATAPI_PASS_THRU = 3, /* SAT pass-thru */
402 ATAPI_MISC = 4, /* the rest */
403
404 /* Timing constants */
405 ATA_TIMING_SETUP = (1 << 0),
406 ATA_TIMING_ACT8B = (1 << 1),
407 ATA_TIMING_REC8B = (1 << 2),
408 ATA_TIMING_CYC8B = (1 << 3),
409 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
410 ATA_TIMING_CYC8B,
411 ATA_TIMING_ACTIVE = (1 << 4),
412 ATA_TIMING_RECOVER = (1 << 5),
413 ATA_TIMING_DMACK_HOLD = (1 << 6),
414 ATA_TIMING_CYCLE = (1 << 7),
415 ATA_TIMING_UDMA = (1 << 8),
416 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
417 ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
418 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
419 ATA_TIMING_DMACK_HOLD | ATA_TIMING_CYCLE |
420 ATA_TIMING_UDMA,
421
422 /* ACPI constants */
423 ATA_ACPI_FILTER_SETXFER = 1 << 0,
424 ATA_ACPI_FILTER_LOCK = 1 << 1,
425 ATA_ACPI_FILTER_DIPM = 1 << 2,
426 ATA_ACPI_FILTER_FPDMA_OFFSET = 1 << 3, /* FPDMA non-zero offset */
427 ATA_ACPI_FILTER_FPDMA_AA = 1 << 4, /* FPDMA auto activate */
428
429 ATA_ACPI_FILTER_DEFAULT = ATA_ACPI_FILTER_SETXFER |
430 ATA_ACPI_FILTER_LOCK |
431 ATA_ACPI_FILTER_DIPM,
432 };
433
434 enum ata_xfer_mask {
435 ATA_MASK_PIO = ((1LU << ATA_NR_PIO_MODES) - 1)
436 << ATA_SHIFT_PIO,
437 ATA_MASK_MWDMA = ((1LU << ATA_NR_MWDMA_MODES) - 1)
438 << ATA_SHIFT_MWDMA,
439 ATA_MASK_UDMA = ((1LU << ATA_NR_UDMA_MODES) - 1)
440 << ATA_SHIFT_UDMA,
441 };
442
443 enum hsm_task_states {
444 HSM_ST_IDLE, /* no command on going */
445 HSM_ST_FIRST, /* (waiting the device to)
446 write CDB or first data block */
447 HSM_ST, /* (waiting the device to) transfer data */
448 HSM_ST_LAST, /* (waiting the device to) complete command */
449 HSM_ST_ERR, /* error */
450 };
451
452 enum ata_completion_errors {
453 AC_ERR_DEV = (1 << 0), /* device reported error */
454 AC_ERR_HSM = (1 << 1), /* host state machine violation */
455 AC_ERR_TIMEOUT = (1 << 2), /* timeout */
456 AC_ERR_MEDIA = (1 << 3), /* media error */
457 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */
458 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */
459 AC_ERR_SYSTEM = (1 << 6), /* system error */
460 AC_ERR_INVALID = (1 << 7), /* invalid argument */
461 AC_ERR_OTHER = (1 << 8), /* unknown */
462 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */
463 AC_ERR_NCQ = (1 << 10), /* marker for offending NCQ qc */
464 };
465
466 /* forward declarations */
467 struct scsi_device;
468 struct ata_port_operations;
469 struct ata_port;
470 struct ata_link;
471 struct ata_queued_cmd;
472
473 /* typedefs */
474 typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
475 typedef int (*ata_prereset_fn_t)(struct ata_link *link, unsigned long deadline);
476 typedef int (*ata_reset_fn_t)(struct ata_link *link, unsigned int *classes,
477 unsigned long deadline);
478 typedef void (*ata_postreset_fn_t)(struct ata_link *link, unsigned int *classes);
479
480 /*
481 * host pm policy: If you alter this, you also need to alter libata-scsi.c
482 * (for the ascii descriptions)
483 */
484 enum link_pm {
485 NOT_AVAILABLE,
486 MIN_POWER,
487 MAX_PERFORMANCE,
488 MEDIUM_POWER,
489 };
490 extern struct device_attribute dev_attr_link_power_management_policy;
491 extern struct device_attribute dev_attr_unload_heads;
492 extern struct device_attribute dev_attr_em_message_type;
493 extern struct device_attribute dev_attr_em_message;
494 extern struct device_attribute dev_attr_sw_activity;
495
496 enum sw_activity {
497 OFF,
498 BLINK_ON,
499 BLINK_OFF,
500 };
501
502 #ifdef CONFIG_ATA_SFF
503 struct ata_ioports {
504 void __iomem *cmd_addr;
505 void __iomem *data_addr;
506 void __iomem *error_addr;
507 void __iomem *feature_addr;
508 void __iomem *nsect_addr;
509 void __iomem *lbal_addr;
510 void __iomem *lbam_addr;
511 void __iomem *lbah_addr;
512 void __iomem *device_addr;
513 void __iomem *status_addr;
514 void __iomem *command_addr;
515 void __iomem *altstatus_addr;
516 void __iomem *ctl_addr;
517 void __iomem *bmdma_addr;
518 void __iomem *scr_addr;
519 };
520 #endif /* CONFIG_ATA_SFF */
521
522 struct ata_host {
523 spinlock_t lock;
524 struct device *dev;
525 void __iomem * const *iomap;
526 unsigned int n_ports;
527 void *private_data;
528 struct ata_port_operations *ops;
529 unsigned long flags;
530 #ifdef CONFIG_ATA_ACPI
531 acpi_handle acpi_handle;
532 #endif
533 struct ata_port *simplex_claimed; /* channel owning the DMA */
534 struct ata_port *ports[0];
535 };
536
537 struct ata_queued_cmd {
538 struct ata_port *ap;
539 struct ata_device *dev;
540
541 struct scsi_cmnd *scsicmd;
542 void (*scsidone)(struct scsi_cmnd *);
543
544 struct ata_taskfile tf;
545 u8 cdb[ATAPI_CDB_LEN];
546
547 unsigned long flags; /* ATA_QCFLAG_xxx */
548 unsigned int tag;
549 unsigned int n_elem;
550 unsigned int orig_n_elem;
551
552 int dma_dir;
553
554 unsigned int sect_size;
555
556 unsigned int nbytes;
557 unsigned int extrabytes;
558 unsigned int curbytes;
559
560 struct scatterlist *cursg;
561 unsigned int cursg_ofs;
562
563 struct scatterlist sgent;
564
565 struct scatterlist *sg;
566
567 unsigned int err_mask;
568 struct ata_taskfile result_tf;
569 ata_qc_cb_t complete_fn;
570
571 void *private_data;
572 void *lldd_task;
573 };
574
575 struct ata_port_stats {
576 unsigned long unhandled_irq;
577 unsigned long idle_irq;
578 unsigned long rw_reqbuf;
579 };
580
581 struct ata_ering_entry {
582 unsigned int eflags;
583 unsigned int err_mask;
584 u64 timestamp;
585 };
586
587 struct ata_ering {
588 int cursor;
589 struct ata_ering_entry ring[ATA_ERING_SIZE];
590 };
591
592 struct ata_device {
593 struct ata_link *link;
594 unsigned int devno; /* 0 or 1 */
595 unsigned int horkage; /* List of broken features */
596 unsigned long flags; /* ATA_DFLAG_xxx */
597 struct scsi_device *sdev; /* attached SCSI device */
598 #ifdef CONFIG_ATA_ACPI
599 acpi_handle acpi_handle;
600 union acpi_object *gtf_cache;
601 unsigned int gtf_filter;
602 #endif
603 /* n_sector is CLEAR_BEGIN, read comment above CLEAR_BEGIN */
604 u64 n_sectors; /* size of device, if ATA */
605 u64 n_native_sectors; /* native size, if ATA */
606 unsigned int class; /* ATA_DEV_xxx */
607 unsigned long unpark_deadline;
608
609 u8 pio_mode;
610 u8 dma_mode;
611 u8 xfer_mode;
612 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
613
614 unsigned int multi_count; /* sectors count for
615 READ/WRITE MULTIPLE */
616 unsigned int max_sectors; /* per-device max sectors */
617 unsigned int cdb_len;
618
619 /* per-dev xfer mask */
620 unsigned long pio_mask;
621 unsigned long mwdma_mask;
622 unsigned long udma_mask;
623
624 /* for CHS addressing */
625 u16 cylinders; /* Number of cylinders */
626 u16 heads; /* Number of heads */
627 u16 sectors; /* Number of sectors per track */
628
629 union {
630 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
631 u32 gscr[SATA_PMP_GSCR_DWORDS]; /* PMP GSCR block */
632 };
633
634 /* error history */
635 int spdn_cnt;
636 /* ering is CLEAR_END, read comment above CLEAR_END */
637 struct ata_ering ering;
638 };
639
640 /* Fields between ATA_DEVICE_CLEAR_BEGIN and ATA_DEVICE_CLEAR_END are
641 * cleared to zero on ata_dev_init().
642 */
643 #define ATA_DEVICE_CLEAR_BEGIN offsetof(struct ata_device, n_sectors)
644 #define ATA_DEVICE_CLEAR_END offsetof(struct ata_device, ering)
645
646 struct ata_eh_info {
647 struct ata_device *dev; /* offending device */
648 u32 serror; /* SError from LLDD */
649 unsigned int err_mask; /* port-wide err_mask */
650 unsigned int action; /* ATA_EH_* action mask */
651 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */
652 unsigned int flags; /* ATA_EHI_* flags */
653
654 unsigned int probe_mask;
655
656 char desc[ATA_EH_DESC_LEN];
657 int desc_len;
658 };
659
660 struct ata_eh_context {
661 struct ata_eh_info i;
662 int tries[ATA_MAX_DEVICES];
663 int cmd_timeout_idx[ATA_MAX_DEVICES]
664 [ATA_EH_CMD_TIMEOUT_TABLE_SIZE];
665 unsigned int classes[ATA_MAX_DEVICES];
666 unsigned int did_probe_mask;
667 unsigned int unloaded_mask;
668 unsigned int saved_ncq_enabled;
669 u8 saved_xfer_mode[ATA_MAX_DEVICES];
670 /* timestamp for the last reset attempt or success */
671 unsigned long last_reset;
672 };
673
674 struct ata_acpi_drive
675 {
676 u32 pio;
677 u32 dma;
678 } __packed;
679
680 struct ata_acpi_gtm {
681 struct ata_acpi_drive drive[2];
682 u32 flags;
683 } __packed;
684
685 struct ata_link {
686 struct ata_port *ap;
687 int pmp; /* port multiplier port # */
688
689 unsigned int active_tag; /* active tag on this link */
690 u32 sactive; /* active NCQ commands */
691
692 unsigned int flags; /* ATA_LFLAG_xxx */
693
694 u32 saved_scontrol; /* SControl on probe */
695 unsigned int hw_sata_spd_limit;
696 unsigned int sata_spd_limit;
697 unsigned int sata_spd; /* current SATA PHY speed */
698
699 /* record runtime error info, protected by host_set lock */
700 struct ata_eh_info eh_info;
701 /* EH context */
702 struct ata_eh_context eh_context;
703
704 struct ata_device device[ATA_MAX_DEVICES];
705 };
706
707 struct ata_port {
708 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */
709 struct ata_port_operations *ops;
710 spinlock_t *lock;
711 /* Flags owned by the EH context. Only EH should touch these once the
712 port is active */
713 unsigned long flags; /* ATA_FLAG_xxx */
714 /* Flags that change dynamically, protected by ap->lock */
715 unsigned int pflags; /* ATA_PFLAG_xxx */
716 unsigned int print_id; /* user visible unique port ID */
717 unsigned int port_no; /* 0 based port no. inside the host */
718
719 struct ata_prd *prd; /* our SG list */
720 dma_addr_t prd_dma; /* and its DMA mapping */
721
722 #ifdef CONFIG_ATA_SFF
723 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
724 #endif /* CONFIG_ATA_SFF */
725
726 u8 ctl; /* cache of ATA control register */
727 u8 last_ctl; /* Cache last written value */
728 unsigned int pio_mask;
729 unsigned int mwdma_mask;
730 unsigned int udma_mask;
731 unsigned int cbl; /* cable type; ATA_CBL_xxx */
732
733 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
734 unsigned long qc_allocated;
735 unsigned int qc_active;
736 int nr_active_links; /* #links with active qcs */
737
738 struct ata_link link; /* host default link */
739 struct ata_link *slave_link; /* see ata_slave_link_init() */
740
741 int nr_pmp_links; /* nr of available PMP links */
742 struct ata_link *pmp_link; /* array of PMP links */
743 struct ata_link *excl_link; /* for PMP qc exclusion */
744
745 struct ata_port_stats stats;
746 struct ata_host *host;
747 struct device *dev;
748
749 void *port_task_data;
750 struct delayed_work port_task;
751 struct delayed_work hotplug_task;
752 struct work_struct scsi_rescan_task;
753
754 unsigned int hsm_task_state;
755
756 u32 msg_enable;
757 struct list_head eh_done_q;
758 wait_queue_head_t eh_wait_q;
759 int eh_tries;
760 struct completion park_req_pending;
761
762 pm_message_t pm_mesg;
763 int *pm_result;
764 enum link_pm pm_policy;
765
766 struct timer_list fastdrain_timer;
767 unsigned long fastdrain_cnt;
768
769 int em_message_type;
770 void *private_data;
771
772 #ifdef CONFIG_ATA_ACPI
773 acpi_handle acpi_handle;
774 struct ata_acpi_gtm __acpi_init_gtm; /* use ata_acpi_init_gtm() */
775 #endif
776 /* owned by EH */
777 u8 sector_buf[ATA_SECT_SIZE] ____cacheline_aligned;
778 };
779
780 /* The following initializer overrides a method to NULL whether one of
781 * its parent has the method defined or not. This is equivalent to
782 * ERR_PTR(-ENOENT). Unfortunately, ERR_PTR doesn't render a constant
783 * expression and thus can't be used as an initializer.
784 */
785 #define ATA_OP_NULL (void *)(unsigned long)(-ENOENT)
786
787 struct ata_port_operations {
788 /*
789 * Command execution
790 */
791 int (*qc_defer)(struct ata_queued_cmd *qc);
792 int (*check_atapi_dma)(struct ata_queued_cmd *qc);
793 void (*qc_prep)(struct ata_queued_cmd *qc);
794 unsigned int (*qc_issue)(struct ata_queued_cmd *qc);
795 bool (*qc_fill_rtf)(struct ata_queued_cmd *qc);
796
797 /*
798 * Configuration and exception handling
799 */
800 int (*cable_detect)(struct ata_port *ap);
801 unsigned long (*mode_filter)(struct ata_device *dev, unsigned long xfer_mask);
802 void (*set_piomode)(struct ata_port *ap, struct ata_device *dev);
803 void (*set_dmamode)(struct ata_port *ap, struct ata_device *dev);
804 int (*set_mode)(struct ata_link *link, struct ata_device **r_failed_dev);
805 unsigned int (*read_id)(struct ata_device *dev, struct ata_taskfile *tf, u16 *id);
806
807 void (*dev_config)(struct ata_device *dev);
808
809 void (*freeze)(struct ata_port *ap);
810 void (*thaw)(struct ata_port *ap);
811 ata_prereset_fn_t prereset;
812 ata_reset_fn_t softreset;
813 ata_reset_fn_t hardreset;
814 ata_postreset_fn_t postreset;
815 ata_prereset_fn_t pmp_prereset;
816 ata_reset_fn_t pmp_softreset;
817 ata_reset_fn_t pmp_hardreset;
818 ata_postreset_fn_t pmp_postreset;
819 void (*error_handler)(struct ata_port *ap);
820 void (*lost_interrupt)(struct ata_port *ap);
821 void (*post_internal_cmd)(struct ata_queued_cmd *qc);
822
823 /*
824 * Optional features
825 */
826 int (*scr_read)(struct ata_link *link, unsigned int sc_reg, u32 *val);
827 int (*scr_write)(struct ata_link *link, unsigned int sc_reg, u32 val);
828 void (*pmp_attach)(struct ata_port *ap);
829 void (*pmp_detach)(struct ata_port *ap);
830 int (*enable_pm)(struct ata_port *ap, enum link_pm policy);
831 void (*disable_pm)(struct ata_port *ap);
832
833 /*
834 * Start, stop, suspend and resume
835 */
836 int (*port_suspend)(struct ata_port *ap, pm_message_t mesg);
837 int (*port_resume)(struct ata_port *ap);
838 int (*port_start)(struct ata_port *ap);
839 void (*port_stop)(struct ata_port *ap);
840 void (*host_stop)(struct ata_host *host);
841
842 #ifdef CONFIG_ATA_SFF
843 /*
844 * SFF / taskfile oriented ops
845 */
846 void (*sff_dev_select)(struct ata_port *ap, unsigned int device);
847 u8 (*sff_check_status)(struct ata_port *ap);
848 u8 (*sff_check_altstatus)(struct ata_port *ap);
849 void (*sff_tf_load)(struct ata_port *ap, const struct ata_taskfile *tf);
850 void (*sff_tf_read)(struct ata_port *ap, struct ata_taskfile *tf);
851 void (*sff_exec_command)(struct ata_port *ap,
852 const struct ata_taskfile *tf);
853 unsigned int (*sff_data_xfer)(struct ata_device *dev,
854 unsigned char *buf, unsigned int buflen, int rw);
855 u8 (*sff_irq_on)(struct ata_port *);
856 void (*sff_irq_clear)(struct ata_port *);
857
858 void (*bmdma_setup)(struct ata_queued_cmd *qc);
859 void (*bmdma_start)(struct ata_queued_cmd *qc);
860 void (*bmdma_stop)(struct ata_queued_cmd *qc);
861 u8 (*bmdma_status)(struct ata_port *ap);
862
863 void (*drain_fifo)(struct ata_queued_cmd *qc);
864 #endif /* CONFIG_ATA_SFF */
865
866 ssize_t (*em_show)(struct ata_port *ap, char *buf);
867 ssize_t (*em_store)(struct ata_port *ap, const char *message,
868 size_t size);
869 ssize_t (*sw_activity_show)(struct ata_device *dev, char *buf);
870 ssize_t (*sw_activity_store)(struct ata_device *dev,
871 enum sw_activity val);
872 /*
873 * Obsolete
874 */
875 void (*phy_reset)(struct ata_port *ap);
876 void (*eng_timeout)(struct ata_port *ap);
877
878 /*
879 * ->inherits must be the last field and all the preceding
880 * fields must be pointers.
881 */
882 const struct ata_port_operations *inherits;
883 };
884
885 struct ata_port_info {
886 unsigned long flags;
887 unsigned long link_flags;
888 unsigned long pio_mask;
889 unsigned long mwdma_mask;
890 unsigned long udma_mask;
891 struct ata_port_operations *port_ops;
892 void *private_data;
893 };
894
895 struct ata_timing {
896 unsigned short mode; /* ATA mode */
897 unsigned short setup; /* t1 */
898 unsigned short act8b; /* t2 for 8-bit I/O */
899 unsigned short rec8b; /* t2i for 8-bit I/O */
900 unsigned short cyc8b; /* t0 for 8-bit I/O */
901 unsigned short active; /* t2 or tD */
902 unsigned short recover; /* t2i or tK */
903 unsigned short dmack_hold; /* tj */
904 unsigned short cycle; /* t0 */
905 unsigned short udma; /* t2CYCTYP/2 */
906 };
907
908 /*
909 * Core layer - drivers/ata/libata-core.c
910 */
911 extern const unsigned long sata_deb_timing_normal[];
912 extern const unsigned long sata_deb_timing_hotplug[];
913 extern const unsigned long sata_deb_timing_long[];
914
915 extern struct ata_port_operations ata_dummy_port_ops;
916 extern const struct ata_port_info ata_dummy_port_info;
917
918 static inline const unsigned long *
919 sata_ehc_deb_timing(struct ata_eh_context *ehc)
920 {
921 if (ehc->i.flags & ATA_EHI_HOTPLUGGED)
922 return sata_deb_timing_hotplug;
923 else
924 return sata_deb_timing_normal;
925 }
926
927 static inline int ata_port_is_dummy(struct ata_port *ap)
928 {
929 return ap->ops == &ata_dummy_port_ops;
930 }
931
932 extern void ata_port_probe(struct ata_port *);
933 extern int sata_set_spd(struct ata_link *link);
934 extern int ata_std_prereset(struct ata_link *link, unsigned long deadline);
935 extern int ata_wait_after_reset(struct ata_link *link, unsigned long deadline,
936 int (*check_ready)(struct ata_link *link));
937 extern int sata_link_debounce(struct ata_link *link,
938 const unsigned long *params, unsigned long deadline);
939 extern int sata_link_resume(struct ata_link *link, const unsigned long *params,
940 unsigned long deadline);
941 extern int sata_link_hardreset(struct ata_link *link,
942 const unsigned long *timing, unsigned long deadline,
943 bool *online, int (*check_ready)(struct ata_link *));
944 extern int sata_std_hardreset(struct ata_link *link, unsigned int *class,
945 unsigned long deadline);
946 extern void ata_std_postreset(struct ata_link *link, unsigned int *classes);
947 extern void ata_port_disable(struct ata_port *);
948
949 extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports);
950 extern struct ata_host *ata_host_alloc_pinfo(struct device *dev,
951 const struct ata_port_info * const * ppi, int n_ports);
952 extern int ata_slave_link_init(struct ata_port *ap);
953 extern int ata_host_start(struct ata_host *host);
954 extern int ata_host_register(struct ata_host *host,
955 struct scsi_host_template *sht);
956 extern int ata_host_activate(struct ata_host *host, int irq,
957 irq_handler_t irq_handler, unsigned long irq_flags,
958 struct scsi_host_template *sht);
959 extern void ata_host_detach(struct ata_host *host);
960 extern void ata_host_init(struct ata_host *, struct device *,
961 unsigned long, struct ata_port_operations *);
962 extern int ata_scsi_detect(struct scsi_host_template *sht);
963 extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
964 extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *));
965 extern int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *dev,
966 int cmd, void __user *arg);
967 extern void ata_sas_port_destroy(struct ata_port *);
968 extern struct ata_port *ata_sas_port_alloc(struct ata_host *,
969 struct ata_port_info *, struct Scsi_Host *);
970 extern int ata_sas_port_init(struct ata_port *);
971 extern int ata_sas_port_start(struct ata_port *ap);
972 extern void ata_sas_port_stop(struct ata_port *ap);
973 extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *);
974 extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
975 struct ata_port *ap);
976 extern int sata_scr_valid(struct ata_link *link);
977 extern int sata_scr_read(struct ata_link *link, int reg, u32 *val);
978 extern int sata_scr_write(struct ata_link *link, int reg, u32 val);
979 extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val);
980 extern bool ata_link_online(struct ata_link *link);
981 extern bool ata_link_offline(struct ata_link *link);
982 #ifdef CONFIG_PM
983 extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg);
984 extern void ata_host_resume(struct ata_host *host);
985 #endif
986 extern int ata_ratelimit(void);
987 extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
988 unsigned long interval, unsigned long timeout);
989 extern int atapi_cmd_type(u8 opcode);
990 extern void ata_tf_to_fis(const struct ata_taskfile *tf,
991 u8 pmp, int is_cmd, u8 *fis);
992 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
993 extern unsigned long ata_pack_xfermask(unsigned long pio_mask,
994 unsigned long mwdma_mask, unsigned long udma_mask);
995 extern void ata_unpack_xfermask(unsigned long xfer_mask,
996 unsigned long *pio_mask, unsigned long *mwdma_mask,
997 unsigned long *udma_mask);
998 extern u8 ata_xfer_mask2mode(unsigned long xfer_mask);
999 extern unsigned long ata_xfer_mode2mask(u8 xfer_mode);
1000 extern int ata_xfer_mode2shift(unsigned long xfer_mode);
1001 extern const char *ata_mode_string(unsigned long xfer_mask);
1002 extern unsigned long ata_id_xfermask(const u16 *id);
1003 extern int ata_port_start(struct ata_port *ap);
1004 extern int ata_std_qc_defer(struct ata_queued_cmd *qc);
1005 extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
1006 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
1007 unsigned int n_elem);
1008 extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
1009 extern void ata_dev_disable(struct ata_device *adev);
1010 extern void ata_id_string(const u16 *id, unsigned char *s,
1011 unsigned int ofs, unsigned int len);
1012 extern void ata_id_c_string(const u16 *id, unsigned char *s,
1013 unsigned int ofs, unsigned int len);
1014 extern unsigned int ata_do_dev_read_id(struct ata_device *dev,
1015 struct ata_taskfile *tf, u16 *id);
1016 extern void ata_qc_complete(struct ata_queued_cmd *qc);
1017 extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active);
1018 extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
1019 void (*done)(struct scsi_cmnd *));
1020 extern int ata_std_bios_param(struct scsi_device *sdev,
1021 struct block_device *bdev,
1022 sector_t capacity, int geom[]);
1023 extern int ata_scsi_slave_config(struct scsi_device *sdev);
1024 extern void ata_scsi_slave_destroy(struct scsi_device *sdev);
1025 extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
1026 int queue_depth);
1027 extern struct ata_device *ata_dev_pair(struct ata_device *adev);
1028 extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev);
1029
1030 extern int ata_cable_40wire(struct ata_port *ap);
1031 extern int ata_cable_80wire(struct ata_port *ap);
1032 extern int ata_cable_sata(struct ata_port *ap);
1033 extern int ata_cable_ignore(struct ata_port *ap);
1034 extern int ata_cable_unknown(struct ata_port *ap);
1035
1036 extern void ata_pio_queue_task(struct ata_port *ap, void *data,
1037 unsigned long delay);
1038
1039 /* Timing helpers */
1040 extern unsigned int ata_pio_need_iordy(const struct ata_device *);
1041 extern const struct ata_timing *ata_timing_find_mode(u8 xfer_mode);
1042 extern int ata_timing_compute(struct ata_device *, unsigned short,
1043 struct ata_timing *, int, int);
1044 extern void ata_timing_merge(const struct ata_timing *,
1045 const struct ata_timing *, struct ata_timing *,
1046 unsigned int);
1047 extern u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle);
1048
1049 /* PCI */
1050 #ifdef CONFIG_PCI
1051 struct pci_dev;
1052
1053 struct pci_bits {
1054 unsigned int reg; /* PCI config register to read */
1055 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
1056 unsigned long mask;
1057 unsigned long val;
1058 };
1059
1060 extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
1061 extern void ata_pci_remove_one(struct pci_dev *pdev);
1062
1063 #ifdef CONFIG_PM
1064 extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg);
1065 extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev);
1066 extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
1067 extern int ata_pci_device_resume(struct pci_dev *pdev);
1068 #endif /* CONFIG_PM */
1069 #endif /* CONFIG_PCI */
1070
1071 /*
1072 * ACPI - drivers/ata/libata-acpi.c
1073 */
1074 #ifdef CONFIG_ATA_ACPI
1075 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
1076 {
1077 if (ap->pflags & ATA_PFLAG_INIT_GTM_VALID)
1078 return &ap->__acpi_init_gtm;
1079 return NULL;
1080 }
1081 int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm);
1082 int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *stm);
1083 unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev,
1084 const struct ata_acpi_gtm *gtm);
1085 int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm);
1086 #else
1087 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
1088 {
1089 return NULL;
1090 }
1091
1092 static inline int ata_acpi_stm(const struct ata_port *ap,
1093 struct ata_acpi_gtm *stm)
1094 {
1095 return -ENOSYS;
1096 }
1097
1098 static inline int ata_acpi_gtm(const struct ata_port *ap,
1099 struct ata_acpi_gtm *stm)
1100 {
1101 return -ENOSYS;
1102 }
1103
1104 static inline unsigned int ata_acpi_gtm_xfermask(struct ata_device *dev,
1105 const struct ata_acpi_gtm *gtm)
1106 {
1107 return 0;
1108 }
1109
1110 static inline int ata_acpi_cbl_80wire(struct ata_port *ap,
1111 const struct ata_acpi_gtm *gtm)
1112 {
1113 return 0;
1114 }
1115 #endif
1116
1117 /*
1118 * EH - drivers/ata/libata-eh.c
1119 */
1120 extern void ata_port_schedule_eh(struct ata_port *ap);
1121 extern int ata_link_abort(struct ata_link *link);
1122 extern int ata_port_abort(struct ata_port *ap);
1123 extern int ata_port_freeze(struct ata_port *ap);
1124 extern int sata_async_notification(struct ata_port *ap);
1125
1126 extern void ata_eh_freeze_port(struct ata_port *ap);
1127 extern void ata_eh_thaw_port(struct ata_port *ap);
1128
1129 extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
1130 extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
1131 extern void ata_eh_analyze_ncq_error(struct ata_link *link);
1132
1133 extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
1134 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
1135 ata_postreset_fn_t postreset);
1136 extern void ata_std_error_handler(struct ata_port *ap);
1137
1138 /*
1139 * Base operations to inherit from and initializers for sht
1140 *
1141 * Operations
1142 *
1143 * base : Common to all libata drivers.
1144 * sata : SATA controllers w/ native interface.
1145 * pmp : SATA controllers w/ PMP support.
1146 * sff : SFF ATA controllers w/o BMDMA support.
1147 * bmdma : SFF ATA controllers w/ BMDMA support.
1148 *
1149 * sht initializers
1150 *
1151 * BASE : Common to all libata drivers. The user must set
1152 * sg_tablesize and dma_boundary.
1153 * PIO : SFF ATA controllers w/ only PIO support.
1154 * BMDMA : SFF ATA controllers w/ BMDMA support. sg_tablesize and
1155 * dma_boundary are set to BMDMA limits.
1156 * NCQ : SATA controllers supporting NCQ. The user must set
1157 * sg_tablesize, dma_boundary and can_queue.
1158 */
1159 extern const struct ata_port_operations ata_base_port_ops;
1160 extern const struct ata_port_operations sata_port_ops;
1161 extern struct device_attribute *ata_common_sdev_attrs[];
1162
1163 #define ATA_BASE_SHT(drv_name) \
1164 .module = THIS_MODULE, \
1165 .name = drv_name, \
1166 .ioctl = ata_scsi_ioctl, \
1167 .queuecommand = ata_scsi_queuecmd, \
1168 .can_queue = ATA_DEF_QUEUE, \
1169 .this_id = ATA_SHT_THIS_ID, \
1170 .cmd_per_lun = ATA_SHT_CMD_PER_LUN, \
1171 .emulated = ATA_SHT_EMULATED, \
1172 .use_clustering = ATA_SHT_USE_CLUSTERING, \
1173 .proc_name = drv_name, \
1174 .slave_configure = ata_scsi_slave_config, \
1175 .slave_destroy = ata_scsi_slave_destroy, \
1176 .bios_param = ata_std_bios_param, \
1177 .sdev_attrs = ata_common_sdev_attrs
1178
1179 #define ATA_NCQ_SHT(drv_name) \
1180 ATA_BASE_SHT(drv_name), \
1181 .change_queue_depth = ata_scsi_change_queue_depth
1182
1183 /*
1184 * PMP helpers
1185 */
1186 #ifdef CONFIG_SATA_PMP
1187 static inline bool sata_pmp_supported(struct ata_port *ap)
1188 {
1189 return ap->flags & ATA_FLAG_PMP;
1190 }
1191
1192 static inline bool sata_pmp_attached(struct ata_port *ap)
1193 {
1194 return ap->nr_pmp_links != 0;
1195 }
1196
1197 static inline int ata_is_host_link(const struct ata_link *link)
1198 {
1199 return link == &link->ap->link || link == link->ap->slave_link;
1200 }
1201 #else /* CONFIG_SATA_PMP */
1202 static inline bool sata_pmp_supported(struct ata_port *ap)
1203 {
1204 return false;
1205 }
1206
1207 static inline bool sata_pmp_attached(struct ata_port *ap)
1208 {
1209 return false;
1210 }
1211
1212 static inline int ata_is_host_link(const struct ata_link *link)
1213 {
1214 return 1;
1215 }
1216 #endif /* CONFIG_SATA_PMP */
1217
1218 static inline int sata_srst_pmp(struct ata_link *link)
1219 {
1220 if (sata_pmp_supported(link->ap) && ata_is_host_link(link))
1221 return SATA_PMP_CTRL_PORT;
1222 return link->pmp;
1223 }
1224
1225 /*
1226 * printk helpers
1227 */
1228 #define ata_port_printk(ap, lv, fmt, args...) \
1229 printk("%sata%u: "fmt, lv, (ap)->print_id , ##args)
1230
1231 #define ata_link_printk(link, lv, fmt, args...) do { \
1232 if (sata_pmp_attached((link)->ap) || (link)->ap->slave_link) \
1233 printk("%sata%u.%02u: "fmt, lv, (link)->ap->print_id, \
1234 (link)->pmp , ##args); \
1235 else \
1236 printk("%sata%u: "fmt, lv, (link)->ap->print_id , ##args); \
1237 } while(0)
1238
1239 #define ata_dev_printk(dev, lv, fmt, args...) \
1240 printk("%sata%u.%02u: "fmt, lv, (dev)->link->ap->print_id, \
1241 (dev)->link->pmp + (dev)->devno , ##args)
1242
1243 /*
1244 * ata_eh_info helpers
1245 */
1246 extern void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...)
1247 __attribute__ ((format (printf, 2, 3)));
1248 extern void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...)
1249 __attribute__ ((format (printf, 2, 3)));
1250 extern void ata_ehi_clear_desc(struct ata_eh_info *ehi);
1251
1252 static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
1253 {
1254 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
1255 ehi->flags |= ATA_EHI_HOTPLUGGED;
1256 ehi->action |= ATA_EH_RESET | ATA_EH_ENABLE_LINK;
1257 ehi->err_mask |= AC_ERR_ATA_BUS;
1258 }
1259
1260 /*
1261 * port description helpers
1262 */
1263 extern void ata_port_desc(struct ata_port *ap, const char *fmt, ...)
1264 __attribute__ ((format (printf, 2, 3)));
1265 #ifdef CONFIG_PCI
1266 extern void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset,
1267 const char *name);
1268 #endif
1269
1270 static inline unsigned int ata_tag_valid(unsigned int tag)
1271 {
1272 return (tag < ATA_MAX_QUEUE) ? 1 : 0;
1273 }
1274
1275 static inline unsigned int ata_tag_internal(unsigned int tag)
1276 {
1277 return tag == ATA_TAG_INTERNAL;
1278 }
1279
1280 /*
1281 * device helpers
1282 */
1283 static inline unsigned int ata_class_enabled(unsigned int class)
1284 {
1285 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI ||
1286 class == ATA_DEV_PMP || class == ATA_DEV_SEMB;
1287 }
1288
1289 static inline unsigned int ata_class_disabled(unsigned int class)
1290 {
1291 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP ||
1292 class == ATA_DEV_PMP_UNSUP || class == ATA_DEV_SEMB_UNSUP;
1293 }
1294
1295 static inline unsigned int ata_class_absent(unsigned int class)
1296 {
1297 return !ata_class_enabled(class) && !ata_class_disabled(class);
1298 }
1299
1300 static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
1301 {
1302 return ata_class_enabled(dev->class);
1303 }
1304
1305 static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
1306 {
1307 return ata_class_disabled(dev->class);
1308 }
1309
1310 static inline unsigned int ata_dev_absent(const struct ata_device *dev)
1311 {
1312 return ata_class_absent(dev->class);
1313 }
1314
1315 /*
1316 * link helpers
1317 */
1318 static inline int ata_link_max_devices(const struct ata_link *link)
1319 {
1320 if (ata_is_host_link(link) && link->ap->flags & ATA_FLAG_SLAVE_POSS)
1321 return 2;
1322 return 1;
1323 }
1324
1325 static inline int ata_link_active(struct ata_link *link)
1326 {
1327 return ata_tag_valid(link->active_tag) || link->sactive;
1328 }
1329
1330 /*
1331 * Iterators
1332 *
1333 * ATA_LITER_* constants are used to select link iteration mode and
1334 * ATA_DITER_* device iteration mode.
1335 *
1336 * For a custom iteration directly using ata_{link|dev}_next(), if
1337 * @link or @dev, respectively, is NULL, the first element is
1338 * returned. @dev and @link can be any valid device or link and the
1339 * next element according to the iteration mode will be returned.
1340 * After the last element, NULL is returned.
1341 */
1342 enum ata_link_iter_mode {
1343 ATA_LITER_EDGE, /* if present, PMP links only; otherwise,
1344 * host link. no slave link */
1345 ATA_LITER_HOST_FIRST, /* host link followed by PMP or slave links */
1346 ATA_LITER_PMP_FIRST, /* PMP links followed by host link,
1347 * slave link still comes after host link */
1348 };
1349
1350 enum ata_dev_iter_mode {
1351 ATA_DITER_ENABLED,
1352 ATA_DITER_ENABLED_REVERSE,
1353 ATA_DITER_ALL,
1354 ATA_DITER_ALL_REVERSE,
1355 };
1356
1357 extern struct ata_link *ata_link_next(struct ata_link *link,
1358 struct ata_port *ap,
1359 enum ata_link_iter_mode mode);
1360
1361 extern struct ata_device *ata_dev_next(struct ata_device *dev,
1362 struct ata_link *link,
1363 enum ata_dev_iter_mode mode);
1364
1365 /*
1366 * Shortcut notation for iterations
1367 *
1368 * ata_for_each_link() iterates over each link of @ap according to
1369 * @mode. @link points to the current link in the loop. @link is
1370 * NULL after loop termination. ata_for_each_dev() works the same way
1371 * except that it iterates over each device of @link.
1372 *
1373 * Note that the mode prefixes ATA_{L|D}ITER_ shouldn't need to be
1374 * specified when using the following shorthand notations. Only the
1375 * mode itself (EDGE, HOST_FIRST, ENABLED, etc...) should be
1376 * specified. This not only increases brevity but also makes it
1377 * impossible to use ATA_LITER_* for device iteration or vice-versa.
1378 */
1379 #define ata_for_each_link(link, ap, mode) \
1380 for ((link) = ata_link_next(NULL, (ap), ATA_LITER_##mode); (link); \
1381 (link) = ata_link_next((link), (ap), ATA_LITER_##mode))
1382
1383 #define ata_for_each_dev(dev, link, mode) \
1384 for ((dev) = ata_dev_next(NULL, (link), ATA_DITER_##mode); (dev); \
1385 (dev) = ata_dev_next((dev), (link), ATA_DITER_##mode))
1386
1387 /**
1388 * ata_ncq_enabled - Test whether NCQ is enabled
1389 * @dev: ATA device to test for
1390 *
1391 * LOCKING:
1392 * spin_lock_irqsave(host lock)
1393 *
1394 * RETURNS:
1395 * 1 if NCQ is enabled for @dev, 0 otherwise.
1396 */
1397 static inline int ata_ncq_enabled(struct ata_device *dev)
1398 {
1399 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF |
1400 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ;
1401 }
1402
1403 static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
1404 {
1405 qc->tf.ctl |= ATA_NIEN;
1406 }
1407
1408 static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap,
1409 unsigned int tag)
1410 {
1411 if (likely(ata_tag_valid(tag)))
1412 return &ap->qcmd[tag];
1413 return NULL;
1414 }
1415
1416 static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap,
1417 unsigned int tag)
1418 {
1419 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
1420
1421 if (unlikely(!qc) || !ap->ops->error_handler)
1422 return qc;
1423
1424 if ((qc->flags & (ATA_QCFLAG_ACTIVE |
1425 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE)
1426 return qc;
1427
1428 return NULL;
1429 }
1430
1431 static inline unsigned int ata_qc_raw_nbytes(struct ata_queued_cmd *qc)
1432 {
1433 return qc->nbytes - min(qc->extrabytes, qc->nbytes);
1434 }
1435
1436 static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
1437 {
1438 memset(tf, 0, sizeof(*tf));
1439
1440 tf->ctl = dev->link->ap->ctl;
1441 if (dev->devno == 0)
1442 tf->device = ATA_DEVICE_OBS;
1443 else
1444 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
1445 }
1446
1447 static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
1448 {
1449 qc->dma_dir = DMA_NONE;
1450 qc->sg = NULL;
1451 qc->flags = 0;
1452 qc->cursg = NULL;
1453 qc->cursg_ofs = 0;
1454 qc->nbytes = qc->extrabytes = qc->curbytes = 0;
1455 qc->n_elem = 0;
1456 qc->err_mask = 0;
1457 qc->sect_size = ATA_SECT_SIZE;
1458
1459 ata_tf_init(qc->dev, &qc->tf);
1460
1461 /* init result_tf such that it indicates normal completion */
1462 qc->result_tf.command = ATA_DRDY;
1463 qc->result_tf.feature = 0;
1464 }
1465
1466 static inline int ata_try_flush_cache(const struct ata_device *dev)
1467 {
1468 return ata_id_wcache_enabled(dev->id) ||
1469 ata_id_has_flush(dev->id) ||
1470 ata_id_has_flush_ext(dev->id);
1471 }
1472
1473 static inline unsigned int ac_err_mask(u8 status)
1474 {
1475 if (status & (ATA_BUSY | ATA_DRQ))
1476 return AC_ERR_HSM;
1477 if (status & (ATA_ERR | ATA_DF))
1478 return AC_ERR_DEV;
1479 return 0;
1480 }
1481
1482 static inline unsigned int __ac_err_mask(u8 status)
1483 {
1484 unsigned int mask = ac_err_mask(status);
1485 if (mask == 0)
1486 return AC_ERR_OTHER;
1487 return mask;
1488 }
1489
1490 static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
1491 {
1492 return *(struct ata_port **)&host->hostdata[0];
1493 }
1494
1495 static inline int ata_check_ready(u8 status)
1496 {
1497 if (!(status & ATA_BUSY))
1498 return 1;
1499
1500 /* 0xff indicates either no device or device not ready */
1501 if (status == 0xff)
1502 return -ENODEV;
1503
1504 return 0;
1505 }
1506
1507 static inline unsigned long ata_deadline(unsigned long from_jiffies,
1508 unsigned long timeout_msecs)
1509 {
1510 return from_jiffies + msecs_to_jiffies(timeout_msecs);
1511 }
1512
1513 /* Don't open code these in drivers as there are traps. Firstly the range may
1514 change in future hardware and specs, secondly 0xFF means 'no DMA' but is
1515 > UDMA_0. Dyma ddreigiau */
1516
1517 static inline int ata_using_mwdma(struct ata_device *adev)
1518 {
1519 if (adev->dma_mode >= XFER_MW_DMA_0 && adev->dma_mode <= XFER_MW_DMA_4)
1520 return 1;
1521 return 0;
1522 }
1523
1524 static inline int ata_using_udma(struct ata_device *adev)
1525 {
1526 if (adev->dma_mode >= XFER_UDMA_0 && adev->dma_mode <= XFER_UDMA_7)
1527 return 1;
1528 return 0;
1529 }
1530
1531 static inline int ata_dma_enabled(struct ata_device *adev)
1532 {
1533 return (adev->dma_mode == 0xFF ? 0 : 1);
1534 }
1535
1536 /**************************************************************************
1537 * PMP - drivers/ata/libata-pmp.c
1538 */
1539 #ifdef CONFIG_SATA_PMP
1540
1541 extern const struct ata_port_operations sata_pmp_port_ops;
1542
1543 extern int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc);
1544 extern void sata_pmp_error_handler(struct ata_port *ap);
1545
1546 #else /* CONFIG_SATA_PMP */
1547
1548 #define sata_pmp_port_ops sata_port_ops
1549 #define sata_pmp_qc_defer_cmd_switch ata_std_qc_defer
1550 #define sata_pmp_error_handler ata_std_error_handler
1551
1552 #endif /* CONFIG_SATA_PMP */
1553
1554
1555 /**************************************************************************
1556 * SFF - drivers/ata/libata-sff.c
1557 */
1558 #ifdef CONFIG_ATA_SFF
1559
1560 extern const struct ata_port_operations ata_sff_port_ops;
1561 extern const struct ata_port_operations ata_bmdma_port_ops;
1562 extern const struct ata_port_operations ata_bmdma32_port_ops;
1563
1564 /* PIO only, sg_tablesize and dma_boundary limits can be removed */
1565 #define ATA_PIO_SHT(drv_name) \
1566 ATA_BASE_SHT(drv_name), \
1567 .sg_tablesize = LIBATA_MAX_PRD, \
1568 .dma_boundary = ATA_DMA_BOUNDARY
1569
1570 #define ATA_BMDMA_SHT(drv_name) \
1571 ATA_BASE_SHT(drv_name), \
1572 .sg_tablesize = LIBATA_MAX_PRD, \
1573 .dma_boundary = ATA_DMA_BOUNDARY
1574
1575 extern void ata_sff_qc_prep(struct ata_queued_cmd *qc);
1576 extern void ata_sff_dumb_qc_prep(struct ata_queued_cmd *qc);
1577 extern void ata_sff_dev_select(struct ata_port *ap, unsigned int device);
1578 extern u8 ata_sff_check_status(struct ata_port *ap);
1579 extern void ata_sff_pause(struct ata_port *ap);
1580 extern void ata_sff_dma_pause(struct ata_port *ap);
1581 extern int ata_sff_busy_sleep(struct ata_port *ap,
1582 unsigned long timeout_pat, unsigned long timeout);
1583 extern int ata_sff_wait_ready(struct ata_link *link, unsigned long deadline);
1584 extern void ata_sff_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
1585 extern void ata_sff_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
1586 extern void ata_sff_exec_command(struct ata_port *ap,
1587 const struct ata_taskfile *tf);
1588 extern unsigned int ata_sff_data_xfer(struct ata_device *dev,
1589 unsigned char *buf, unsigned int buflen, int rw);
1590 extern unsigned int ata_sff_data_xfer32(struct ata_device *dev,
1591 unsigned char *buf, unsigned int buflen, int rw);
1592 extern unsigned int ata_sff_data_xfer_noirq(struct ata_device *dev,
1593 unsigned char *buf, unsigned int buflen, int rw);
1594 extern u8 ata_sff_irq_on(struct ata_port *ap);
1595 extern void ata_sff_irq_clear(struct ata_port *ap);
1596 extern int ata_sff_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
1597 u8 status, int in_wq);
1598 extern unsigned int ata_sff_qc_issue(struct ata_queued_cmd *qc);
1599 extern bool ata_sff_qc_fill_rtf(struct ata_queued_cmd *qc);
1600 extern unsigned int ata_sff_host_intr(struct ata_port *ap,
1601 struct ata_queued_cmd *qc);
1602 extern irqreturn_t ata_sff_interrupt(int irq, void *dev_instance);
1603 extern void ata_sff_lost_interrupt(struct ata_port *ap);
1604 extern void ata_sff_freeze(struct ata_port *ap);
1605 extern void ata_sff_thaw(struct ata_port *ap);
1606 extern int ata_sff_prereset(struct ata_link *link, unsigned long deadline);
1607 extern unsigned int ata_sff_dev_classify(struct ata_device *dev, int present,
1608 u8 *r_err);
1609 extern int ata_sff_wait_after_reset(struct ata_link *link, unsigned int devmask,
1610 unsigned long deadline);
1611 extern int ata_sff_softreset(struct ata_link *link, unsigned int *classes,
1612 unsigned long deadline);
1613 extern int sata_sff_hardreset(struct ata_link *link, unsigned int *class,
1614 unsigned long deadline);
1615 extern void ata_sff_postreset(struct ata_link *link, unsigned int *classes);
1616 extern void ata_sff_drain_fifo(struct ata_queued_cmd *qc);
1617 extern void ata_sff_error_handler(struct ata_port *ap);
1618 extern void ata_sff_post_internal_cmd(struct ata_queued_cmd *qc);
1619 extern int ata_sff_port_start(struct ata_port *ap);
1620 extern int ata_sff_port_start32(struct ata_port *ap);
1621 extern void ata_sff_std_ports(struct ata_ioports *ioaddr);
1622 extern unsigned long ata_bmdma_mode_filter(struct ata_device *dev,
1623 unsigned long xfer_mask);
1624 extern void ata_bmdma_setup(struct ata_queued_cmd *qc);
1625 extern void ata_bmdma_start(struct ata_queued_cmd *qc);
1626 extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
1627 extern u8 ata_bmdma_status(struct ata_port *ap);
1628 extern void ata_bus_reset(struct ata_port *ap);
1629
1630 #ifdef CONFIG_PCI
1631 extern int ata_pci_bmdma_clear_simplex(struct pci_dev *pdev);
1632 extern int ata_pci_bmdma_init(struct ata_host *host);
1633 extern int ata_pci_sff_init_host(struct ata_host *host);
1634 extern int ata_pci_sff_prepare_host(struct pci_dev *pdev,
1635 const struct ata_port_info * const * ppi,
1636 struct ata_host **r_host);
1637 extern int ata_pci_sff_activate_host(struct ata_host *host,
1638 irq_handler_t irq_handler,
1639 struct scsi_host_template *sht);
1640 extern int ata_pci_sff_init_one(struct pci_dev *pdev,
1641 const struct ata_port_info * const * ppi,
1642 struct scsi_host_template *sht, void *host_priv);
1643 #endif /* CONFIG_PCI */
1644
1645 /**
1646 * ata_sff_busy_wait - Wait for a port status register
1647 * @ap: Port to wait for.
1648 * @bits: bits that must be clear
1649 * @max: number of 10uS waits to perform
1650 *
1651 * Waits up to max*10 microseconds for the selected bits in the port's
1652 * status register to be cleared.
1653 * Returns final value of status register.
1654 *
1655 * LOCKING:
1656 * Inherited from caller.
1657 */
1658 static inline u8 ata_sff_busy_wait(struct ata_port *ap, unsigned int bits,
1659 unsigned int max)
1660 {
1661 u8 status;
1662
1663 do {
1664 udelay(10);
1665 status = ap->ops->sff_check_status(ap);
1666 max--;
1667 } while (status != 0xff && (status & bits) && (max > 0));
1668
1669 return status;
1670 }
1671
1672 /**
1673 * ata_wait_idle - Wait for a port to be idle.
1674 * @ap: Port to wait for.
1675 *
1676 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
1677 * Returns final value of status register.
1678 *
1679 * LOCKING:
1680 * Inherited from caller.
1681 */
1682 static inline u8 ata_wait_idle(struct ata_port *ap)
1683 {
1684 u8 status = ata_sff_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
1685
1686 #ifdef ATA_DEBUG
1687 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ)))
1688 ata_port_printk(ap, KERN_DEBUG, "abnormal Status 0x%X\n",
1689 status);
1690 #endif
1691
1692 return status;
1693 }
1694 #endif /* CONFIG_ATA_SFF */
1695
1696 #endif /* __LINUX_LIBATA_H__ */
mm of the moment repository