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mm/memory_hotplug.c: make scan_lru_pages() static
[linux-2.6/next.git] / include / linux / libata.h
blob15b77b8dc7e11f529b93cc9ba629f464627d3a74
1 /*
2 * Copyright 2003-2005 Red Hat, Inc. All rights reserved.
3 * Copyright 2003-2005 Jeff Garzik
4 *
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2, or (at your option)
9 * any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; see the file COPYING. If not, write to
18 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
19 *
20 *
21 * libata documentation is available via 'make {ps|pdf}docs',
22 * as Documentation/DocBook/libata.*
23 *
24 */
25
26 #ifndef __LINUX_LIBATA_H__
27 #define __LINUX_LIBATA_H__
28
29 #include <linux/delay.h>
30 #include <linux/jiffies.h>
31 #include <linux/interrupt.h>
32 #include <linux/dma-mapping.h>
33 #include <linux/scatterlist.h>
34 #include <linux/io.h>
35 #include <linux/ata.h>
36 #include <linux/workqueue.h>
37 #include <scsi/scsi_host.h>
38 #include <linux/acpi.h>
39 #include <linux/cdrom.h>
40 #include <linux/sched.h>
41
42 /*
43 * Define if arch has non-standard setup. This is a _PCI_ standard
44 * not a legacy or ISA standard.
45 */
46 #ifdef CONFIG_ATA_NONSTANDARD
47 #include <asm/libata-portmap.h>
48 #else
49 #include <asm-generic/libata-portmap.h>
50 #endif
51
52 /*
53 * compile-time options: to be removed as soon as all the drivers are
54 * converted to the new debugging mechanism
55 */
56 #undef ATA_DEBUG /* debugging output */
57 #undef ATA_VERBOSE_DEBUG /* yet more debugging output */
58 #undef ATA_IRQ_TRAP /* define to ack screaming irqs */
59 #undef ATA_NDEBUG /* define to disable quick runtime checks */
60
61
62 /* note: prints function name for you */
63 #ifdef ATA_DEBUG
64 #define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args)
65 #ifdef ATA_VERBOSE_DEBUG
66 #define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args)
67 #else
68 #define VPRINTK(fmt, args...)
69 #endif /* ATA_VERBOSE_DEBUG */
70 #else
71 #define DPRINTK(fmt, args...)
72 #define VPRINTK(fmt, args...)
73 #endif /* ATA_DEBUG */
74
75 #define BPRINTK(fmt, args...) if (ap->flags & ATA_FLAG_DEBUGMSG) printk(KERN_ERR "%s: " fmt, __func__, ## args)
76
77 /* NEW: debug levels */
78 #define HAVE_LIBATA_MSG 1
79
80 enum {
81 ATA_MSG_DRV = 0x0001,
82 ATA_MSG_INFO = 0x0002,
83 ATA_MSG_PROBE = 0x0004,
84 ATA_MSG_WARN = 0x0008,
85 ATA_MSG_MALLOC = 0x0010,
86 ATA_MSG_CTL = 0x0020,
87 ATA_MSG_INTR = 0x0040,
88 ATA_MSG_ERR = 0x0080,
89 };
90
91 #define ata_msg_drv(p) ((p)->msg_enable & ATA_MSG_DRV)
92 #define ata_msg_info(p) ((p)->msg_enable & ATA_MSG_INFO)
93 #define ata_msg_probe(p) ((p)->msg_enable & ATA_MSG_PROBE)
94 #define ata_msg_warn(p) ((p)->msg_enable & ATA_MSG_WARN)
95 #define ata_msg_malloc(p) ((p)->msg_enable & ATA_MSG_MALLOC)
96 #define ata_msg_ctl(p) ((p)->msg_enable & ATA_MSG_CTL)
97 #define ata_msg_intr(p) ((p)->msg_enable & ATA_MSG_INTR)
98 #define ata_msg_err(p) ((p)->msg_enable & ATA_MSG_ERR)
99
100 static inline u32 ata_msg_init(int dval, int default_msg_enable_bits)
101 {
102 if (dval < 0 || dval >= (sizeof(u32) * 8))
103 return default_msg_enable_bits; /* should be 0x1 - only driver info msgs */
104 if (!dval)
105 return 0;
106 return (1 << dval) - 1;
107 }
108
109 /* defines only for the constants which don't work well as enums */
110 #define ATA_TAG_POISON 0xfafbfcfdU
111
112 enum {
113 /* various global constants */
114 LIBATA_MAX_PRD = ATA_MAX_PRD / 2,
115 LIBATA_DUMB_MAX_PRD = ATA_MAX_PRD / 4, /* Worst case */
116 ATA_DEF_QUEUE = 1,
117 /* tag ATA_MAX_QUEUE - 1 is reserved for internal commands */
118 ATA_MAX_QUEUE = 32,
119 ATA_TAG_INTERNAL = ATA_MAX_QUEUE - 1,
120 ATA_SHORT_PAUSE = 16,
121
122 ATAPI_MAX_DRAIN = 16 << 10,
123
124 ATA_ALL_DEVICES = (1 << ATA_MAX_DEVICES) - 1,
125
126 ATA_SHT_EMULATED = 1,
127 ATA_SHT_CMD_PER_LUN = 1,
128 ATA_SHT_THIS_ID = -1,
129 ATA_SHT_USE_CLUSTERING = 1,
130
131 /* struct ata_device stuff */
132 ATA_DFLAG_LBA = (1 << 0), /* device supports LBA */
133 ATA_DFLAG_LBA48 = (1 << 1), /* device supports LBA48 */
134 ATA_DFLAG_CDB_INTR = (1 << 2), /* device asserts INTRQ when ready for CDB */
135 ATA_DFLAG_NCQ = (1 << 3), /* device supports NCQ */
136 ATA_DFLAG_FLUSH_EXT = (1 << 4), /* do FLUSH_EXT instead of FLUSH */
137 ATA_DFLAG_ACPI_PENDING = (1 << 5), /* ACPI resume action pending */
138 ATA_DFLAG_ACPI_FAILED = (1 << 6), /* ACPI on devcfg has failed */
139 ATA_DFLAG_AN = (1 << 7), /* AN configured */
140 ATA_DFLAG_HIPM = (1 << 8), /* device supports HIPM */
141 ATA_DFLAG_DIPM = (1 << 9), /* device supports DIPM */
142 ATA_DFLAG_DMADIR = (1 << 10), /* device requires DMADIR */
143 ATA_DFLAG_CFG_MASK = (1 << 12) - 1,
144
145 ATA_DFLAG_PIO = (1 << 12), /* device limited to PIO mode */
146 ATA_DFLAG_NCQ_OFF = (1 << 13), /* device limited to non-NCQ mode */
147 ATA_DFLAG_SLEEPING = (1 << 15), /* device is sleeping */
148 ATA_DFLAG_DUBIOUS_XFER = (1 << 16), /* data transfer not verified */
149 ATA_DFLAG_NO_UNLOAD = (1 << 17), /* device doesn't support unload */
150 ATA_DFLAG_UNLOCK_HPA = (1 << 18), /* unlock HPA */
151 ATA_DFLAG_INIT_MASK = (1 << 24) - 1,
152
153 ATA_DFLAG_DETACH = (1 << 24),
154 ATA_DFLAG_DETACHED = (1 << 25),
155
156 ATA_DEV_UNKNOWN = 0, /* unknown device */
157 ATA_DEV_ATA = 1, /* ATA device */
158 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */
159 ATA_DEV_ATAPI = 3, /* ATAPI device */
160 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */
161 ATA_DEV_PMP = 5, /* SATA port multiplier */
162 ATA_DEV_PMP_UNSUP = 6, /* SATA port multiplier (unsupported) */
163 ATA_DEV_SEMB = 7, /* SEMB */
164 ATA_DEV_SEMB_UNSUP = 8, /* SEMB (unsupported) */
165 ATA_DEV_NONE = 9, /* no device */
166
167 /* struct ata_link flags */
168 ATA_LFLAG_NO_HRST = (1 << 1), /* avoid hardreset */
169 ATA_LFLAG_NO_SRST = (1 << 2), /* avoid softreset */
170 ATA_LFLAG_ASSUME_ATA = (1 << 3), /* assume ATA class */
171 ATA_LFLAG_ASSUME_SEMB = (1 << 4), /* assume SEMB class */
172 ATA_LFLAG_ASSUME_CLASS = ATA_LFLAG_ASSUME_ATA | ATA_LFLAG_ASSUME_SEMB,
173 ATA_LFLAG_NO_RETRY = (1 << 5), /* don't retry this link */
174 ATA_LFLAG_DISABLED = (1 << 6), /* link is disabled */
175 ATA_LFLAG_SW_ACTIVITY = (1 << 7), /* keep activity stats */
176 ATA_LFLAG_NO_LPM = (1 << 8), /* disable LPM on this link */
177
178 /* struct ata_port flags */
179 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */
180 /* (doesn't imply presence) */
181 ATA_FLAG_SATA = (1 << 1),
182 ATA_FLAG_NO_LEGACY = (1 << 2), /* no legacy mode check */
183 ATA_FLAG_MMIO = (1 << 3), /* use MMIO, not PIO */
184 ATA_FLAG_SRST = (1 << 4), /* (obsolete) use ATA SRST, not E.D.D. */
185 ATA_FLAG_SATA_RESET = (1 << 5), /* (obsolete) use COMRESET */
186 ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */
187 ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */
188 ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */
189 ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD
190 * doesn't handle PIO interrupts */
191 ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */
192 ATA_FLAG_NO_POWEROFF_SPINDOWN = (1 << 11), /* don't spindown before poweroff */
193 ATA_FLAG_NO_HIBERNATE_SPINDOWN = (1 << 12), /* don't spindown before hibernation */
194 ATA_FLAG_DEBUGMSG = (1 << 13),
195 ATA_FLAG_FPDMA_AA = (1 << 14), /* driver supports Auto-Activate */
196 ATA_FLAG_IGN_SIMPLEX = (1 << 15), /* ignore SIMPLEX */
197 ATA_FLAG_NO_IORDY = (1 << 16), /* controller lacks iordy */
198 ATA_FLAG_ACPI_SATA = (1 << 17), /* need native SATA ACPI layout */
199 ATA_FLAG_AN = (1 << 18), /* controller supports AN */
200 ATA_FLAG_PMP = (1 << 19), /* controller supports PMP */
201 ATA_FLAG_LPM = (1 << 20), /* driver can handle LPM */
202 ATA_FLAG_EM = (1 << 21), /* driver supports enclosure
203 * management */
204 ATA_FLAG_SW_ACTIVITY = (1 << 22), /* driver supports sw activity
205 * led */
206
207 /* bits 24:31 of ap->flags are reserved for LLD specific flags */
208
209
210 /* struct ata_port pflags */
211 ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */
212 ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */
213 ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */
214 ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */
215 ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */
216 ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */
217 ATA_PFLAG_INITIALIZING = (1 << 7), /* being initialized, don't touch */
218 ATA_PFLAG_RESETTING = (1 << 8), /* reset in progress */
219 ATA_PFLAG_UNLOADING = (1 << 9), /* driver is being unloaded */
220 ATA_PFLAG_UNLOADED = (1 << 10), /* driver is unloaded */
221
222 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */
223 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */
224 ATA_PFLAG_INIT_GTM_VALID = (1 << 19), /* initial gtm data valid */
225
226 ATA_PFLAG_PIO32 = (1 << 20), /* 32bit PIO */
227 ATA_PFLAG_PIO32CHANGE = (1 << 21), /* 32bit PIO can be turned on/off */
228
229 /* struct ata_queued_cmd flags */
230 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */
231 ATA_QCFLAG_DMAMAP = (1 << 1), /* SG table is DMA mapped */
232 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */
233 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */
234 ATA_QCFLAG_CLEAR_EXCL = (1 << 5), /* clear excl_link on completion */
235 ATA_QCFLAG_QUIET = (1 << 6), /* don't report device error */
236 ATA_QCFLAG_RETRY = (1 << 7), /* retry after failure */
237
238 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */
239 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */
240 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */
241
242 /* host set flags */
243 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */
244 ATA_HOST_STARTED = (1 << 1), /* Host started */
245 ATA_HOST_PARALLEL_SCAN = (1 << 2), /* Ports on this host can be scanned in parallel */
246
247 /* bits 24:31 of host->flags are reserved for LLD specific flags */
248
249 /* various lengths of time */
250 ATA_TMOUT_BOOT = 30000, /* heuristic */
251 ATA_TMOUT_BOOT_QUICK = 7000, /* heuristic */
252 ATA_TMOUT_INTERNAL_QUICK = 5000,
253 ATA_TMOUT_MAX_PARK = 30000,
254
255 /*
256 * GoVault needs 2s and iVDR disk HHD424020F7SV00 800ms. 2s
257 * is too much without parallel probing. Use 2s if parallel
258 * probing is available, 800ms otherwise.
259 */
260 ATA_TMOUT_FF_WAIT_LONG = 2000,
261 ATA_TMOUT_FF_WAIT = 800,
262
263 /* Spec mandates to wait for ">= 2ms" before checking status
264 * after reset. We wait 150ms, because that was the magic
265 * delay used for ATAPI devices in Hale Landis's ATADRVR, for
266 * the period of time between when the ATA command register is
267 * written, and then status is checked. Because waiting for
268 * "a while" before checking status is fine, post SRST, we
269 * perform this magic delay here as well.
270 *
271 * Old drivers/ide uses the 2mS rule and then waits for ready.
272 */
273 ATA_WAIT_AFTER_RESET = 150,
274
275 /* If PMP is supported, we have to do follow-up SRST. As some
276 * PMPs don't send D2H Reg FIS after hardreset, LLDs are
277 * advised to wait only for the following duration before
278 * doing SRST.
279 */
280 ATA_TMOUT_PMP_SRST_WAIT = 5000,
281
282 /* ATA bus states */
283 BUS_UNKNOWN = 0,
284 BUS_DMA = 1,
285 BUS_IDLE = 2,
286 BUS_NOINTR = 3,
287 BUS_NODATA = 4,
288 BUS_TIMER = 5,
289 BUS_PIO = 6,
290 BUS_EDD = 7,
291 BUS_IDENTIFY = 8,
292 BUS_PACKET = 9,
293
294 /* SATA port states */
295 PORT_UNKNOWN = 0,
296 PORT_ENABLED = 1,
297 PORT_DISABLED = 2,
298
299 /* encoding various smaller bitmaps into a single
300 * unsigned long bitmap
301 */
302 ATA_NR_PIO_MODES = 7,
303 ATA_NR_MWDMA_MODES = 5,
304 ATA_NR_UDMA_MODES = 8,
305
306 ATA_SHIFT_PIO = 0,
307 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_NR_PIO_MODES,
308 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_NR_MWDMA_MODES,
309
310 /* size of buffer to pad xfers ending on unaligned boundaries */
311 ATA_DMA_PAD_SZ = 4,
312
313 /* ering size */
314 ATA_ERING_SIZE = 32,
315
316 /* return values for ->qc_defer */
317 ATA_DEFER_LINK = 1,
318 ATA_DEFER_PORT = 2,
319
320 /* desc_len for ata_eh_info and context */
321 ATA_EH_DESC_LEN = 80,
322
323 /* reset / recovery action types */
324 ATA_EH_REVALIDATE = (1 << 0),
325 ATA_EH_SOFTRESET = (1 << 1), /* meaningful only in ->prereset */
326 ATA_EH_HARDRESET = (1 << 2), /* meaningful only in ->prereset */
327 ATA_EH_RESET = ATA_EH_SOFTRESET | ATA_EH_HARDRESET,
328 ATA_EH_ENABLE_LINK = (1 << 3),
329 ATA_EH_PARK = (1 << 5), /* unload heads and stop I/O */
330
331 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE | ATA_EH_PARK,
332 ATA_EH_ALL_ACTIONS = ATA_EH_REVALIDATE | ATA_EH_RESET |
333 ATA_EH_ENABLE_LINK,
334
335 /* ata_eh_info->flags */
336 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */
337 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */
338 ATA_EHI_QUIET = (1 << 3), /* be quiet */
339 ATA_EHI_NO_RECOVERY = (1 << 4), /* no recovery */
340
341 ATA_EHI_DID_SOFTRESET = (1 << 16), /* already soft-reset this port */
342 ATA_EHI_DID_HARDRESET = (1 << 17), /* already soft-reset this port */
343 ATA_EHI_PRINTINFO = (1 << 18), /* print configuration info */
344 ATA_EHI_SETMODE = (1 << 19), /* configure transfer mode */
345 ATA_EHI_POST_SETMODE = (1 << 20), /* revalidating after setmode */
346
347 ATA_EHI_DID_RESET = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET,
348
349 /* mask of flags to transfer *to* the slave link */
350 ATA_EHI_TO_SLAVE_MASK = ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET,
351
352 /* max tries if error condition is still set after ->error_handler */
353 ATA_EH_MAX_TRIES = 5,
354
355 /* sometimes resuming a link requires several retries */
356 ATA_LINK_RESUME_TRIES = 5,
357
358 /* how hard are we gonna try to probe/recover devices */
359 ATA_PROBE_MAX_TRIES = 3,
360 ATA_EH_DEV_TRIES = 3,
361 ATA_EH_PMP_TRIES = 5,
362 ATA_EH_PMP_LINK_TRIES = 3,
363
364 SATA_PMP_RW_TIMEOUT = 3000, /* PMP read/write timeout */
365
366 /* This should match the actual table size of
367 * ata_eh_cmd_timeout_table in libata-eh.c.
368 */
369 ATA_EH_CMD_TIMEOUT_TABLE_SIZE = 6,
370
371 /* Horkage types. May be set by libata or controller on drives
372 (some horkage may be drive/controller pair dependant */
373
374 ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */
375 ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */
376 ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */
377 ATA_HORKAGE_MAX_SEC_128 = (1 << 3), /* Limit max sects to 128 */
378 ATA_HORKAGE_BROKEN_HPA = (1 << 4), /* Broken HPA */
379 ATA_HORKAGE_DISABLE = (1 << 5), /* Disable it */
380 ATA_HORKAGE_HPA_SIZE = (1 << 6), /* native size off by one */
381 ATA_HORKAGE_IVB = (1 << 8), /* cbl det validity bit bugs */
382 ATA_HORKAGE_STUCK_ERR = (1 << 9), /* stuck ERR on next PACKET */
383 ATA_HORKAGE_BRIDGE_OK = (1 << 10), /* no bridge limits */
384 ATA_HORKAGE_ATAPI_MOD16_DMA = (1 << 11), /* use ATAPI DMA for commands
385 not multiple of 16 bytes */
386 ATA_HORKAGE_FIRMWARE_WARN = (1 << 12), /* firmware update warning */
387 ATA_HORKAGE_1_5_GBPS = (1 << 13), /* force 1.5 Gbps */
388 ATA_HORKAGE_NOSETXFER = (1 << 14), /* skip SETXFER, SATA only */
389 ATA_HORKAGE_BROKEN_FPDMA_AA = (1 << 15), /* skip AA */
390 ATA_HORKAGE_DUMP_ID = (1 << 16), /* dump IDENTIFY data */
391
392 /* DMA mask for user DMA control: User visible values; DO NOT
393 renumber */
394 ATA_DMA_MASK_ATA = (1 << 0), /* DMA on ATA Disk */
395 ATA_DMA_MASK_ATAPI = (1 << 1), /* DMA on ATAPI */
396 ATA_DMA_MASK_CFA = (1 << 2), /* DMA on CF Card */
397
398 /* ATAPI command types */
399 ATAPI_READ = 0, /* READs */
400 ATAPI_WRITE = 1, /* WRITEs */
401 ATAPI_READ_CD = 2, /* READ CD [MSF] */
402 ATAPI_PASS_THRU = 3, /* SAT pass-thru */
403 ATAPI_MISC = 4, /* the rest */
404
405 /* Timing constants */
406 ATA_TIMING_SETUP = (1 << 0),
407 ATA_TIMING_ACT8B = (1 << 1),
408 ATA_TIMING_REC8B = (1 << 2),
409 ATA_TIMING_CYC8B = (1 << 3),
410 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
411 ATA_TIMING_CYC8B,
412 ATA_TIMING_ACTIVE = (1 << 4),
413 ATA_TIMING_RECOVER = (1 << 5),
414 ATA_TIMING_DMACK_HOLD = (1 << 6),
415 ATA_TIMING_CYCLE = (1 << 7),
416 ATA_TIMING_UDMA = (1 << 8),
417 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
418 ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
419 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
420 ATA_TIMING_DMACK_HOLD | ATA_TIMING_CYCLE |
421 ATA_TIMING_UDMA,
422
423 /* ACPI constants */
424 ATA_ACPI_FILTER_SETXFER = 1 << 0,
425 ATA_ACPI_FILTER_LOCK = 1 << 1,
426 ATA_ACPI_FILTER_DIPM = 1 << 2,
427 ATA_ACPI_FILTER_FPDMA_OFFSET = 1 << 3, /* FPDMA non-zero offset */
428 ATA_ACPI_FILTER_FPDMA_AA = 1 << 4, /* FPDMA auto activate */
429
430 ATA_ACPI_FILTER_DEFAULT = ATA_ACPI_FILTER_SETXFER |
431 ATA_ACPI_FILTER_LOCK |
432 ATA_ACPI_FILTER_DIPM,
433 };
434
435 enum ata_xfer_mask {
436 ATA_MASK_PIO = ((1LU << ATA_NR_PIO_MODES) - 1)
437 << ATA_SHIFT_PIO,
438 ATA_MASK_MWDMA = ((1LU << ATA_NR_MWDMA_MODES) - 1)
439 << ATA_SHIFT_MWDMA,
440 ATA_MASK_UDMA = ((1LU << ATA_NR_UDMA_MODES) - 1)
441 << ATA_SHIFT_UDMA,
442 };
443
444 enum hsm_task_states {
445 HSM_ST_IDLE, /* no command on going */
446 HSM_ST_FIRST, /* (waiting the device to)
447 write CDB or first data block */
448 HSM_ST, /* (waiting the device to) transfer data */
449 HSM_ST_LAST, /* (waiting the device to) complete command */
450 HSM_ST_ERR, /* error */
451 };
452
453 enum ata_completion_errors {
454 AC_ERR_DEV = (1 << 0), /* device reported error */
455 AC_ERR_HSM = (1 << 1), /* host state machine violation */
456 AC_ERR_TIMEOUT = (1 << 2), /* timeout */
457 AC_ERR_MEDIA = (1 << 3), /* media error */
458 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */
459 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */
460 AC_ERR_SYSTEM = (1 << 6), /* system error */
461 AC_ERR_INVALID = (1 << 7), /* invalid argument */
462 AC_ERR_OTHER = (1 << 8), /* unknown */
463 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */
464 AC_ERR_NCQ = (1 << 10), /* marker for offending NCQ qc */
465 };
466
467 /*
468 * Link power management policy: If you alter this, you also need to
469 * alter libata-scsi.c (for the ascii descriptions)
470 */
471 enum ata_lpm_policy {
472 ATA_LPM_UNKNOWN,
473 ATA_LPM_MAX_POWER,
474 ATA_LPM_MED_POWER,
475 ATA_LPM_MIN_POWER,
476 };
477
478 enum ata_lpm_hints {
479 ATA_LPM_EMPTY = (1 << 0), /* port empty/probing */
480 ATA_LPM_HIPM = (1 << 1), /* may use HIPM */
481 };
482
483 /* forward declarations */
484 struct scsi_device;
485 struct ata_port_operations;
486 struct ata_port;
487 struct ata_link;
488 struct ata_queued_cmd;
489
490 /* typedefs */
491 typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
492 typedef int (*ata_prereset_fn_t)(struct ata_link *link, unsigned long deadline);
493 typedef int (*ata_reset_fn_t)(struct ata_link *link, unsigned int *classes,
494 unsigned long deadline);
495 typedef void (*ata_postreset_fn_t)(struct ata_link *link, unsigned int *classes);
496
497 extern struct device_attribute dev_attr_link_power_management_policy;
498 extern struct device_attribute dev_attr_unload_heads;
499 extern struct device_attribute dev_attr_em_message_type;
500 extern struct device_attribute dev_attr_em_message;
501 extern struct device_attribute dev_attr_sw_activity;
502
503 enum sw_activity {
504 OFF,
505 BLINK_ON,
506 BLINK_OFF,
507 };
508
509 #ifdef CONFIG_ATA_SFF
510 struct ata_ioports {
511 void __iomem *cmd_addr;
512 void __iomem *data_addr;
513 void __iomem *error_addr;
514 void __iomem *feature_addr;
515 void __iomem *nsect_addr;
516 void __iomem *lbal_addr;
517 void __iomem *lbam_addr;
518 void __iomem *lbah_addr;
519 void __iomem *device_addr;
520 void __iomem *status_addr;
521 void __iomem *command_addr;
522 void __iomem *altstatus_addr;
523 void __iomem *ctl_addr;
524 #ifdef CONFIG_ATA_BMDMA
525 void __iomem *bmdma_addr;
526 #endif /* CONFIG_ATA_BMDMA */
527 void __iomem *scr_addr;
528 };
529 #endif /* CONFIG_ATA_SFF */
530
531 struct ata_host {
532 spinlock_t lock;
533 struct device *dev;
534 void __iomem * const *iomap;
535 unsigned int n_ports;
536 void *private_data;
537 struct ata_port_operations *ops;
538 unsigned long flags;
539
540 struct mutex eh_mutex;
541 struct task_struct *eh_owner;
542
543 #ifdef CONFIG_ATA_ACPI
544 acpi_handle acpi_handle;
545 #endif
546 struct ata_port *simplex_claimed; /* channel owning the DMA */
547 struct ata_port *ports[0];
548 };
549
550 struct ata_queued_cmd {
551 struct ata_port *ap;
552 struct ata_device *dev;
553
554 struct scsi_cmnd *scsicmd;
555 void (*scsidone)(struct scsi_cmnd *);
556
557 struct ata_taskfile tf;
558 u8 cdb[ATAPI_CDB_LEN];
559
560 unsigned long flags; /* ATA_QCFLAG_xxx */
561 unsigned int tag;
562 unsigned int n_elem;
563 unsigned int orig_n_elem;
564
565 int dma_dir;
566
567 unsigned int sect_size;
568
569 unsigned int nbytes;
570 unsigned int extrabytes;
571 unsigned int curbytes;
572
573 struct scatterlist sgent;
574
575 struct scatterlist *sg;
576
577 struct scatterlist *cursg;
578 unsigned int cursg_ofs;
579
580 unsigned int err_mask;
581 struct ata_taskfile result_tf;
582 ata_qc_cb_t complete_fn;
583
584 void *private_data;
585 void *lldd_task;
586 };
587
588 struct ata_port_stats {
589 unsigned long unhandled_irq;
590 unsigned long idle_irq;
591 unsigned long rw_reqbuf;
592 };
593
594 struct ata_ering_entry {
595 unsigned int eflags;
596 unsigned int err_mask;
597 u64 timestamp;
598 };
599
600 struct ata_ering {
601 int cursor;
602 struct ata_ering_entry ring[ATA_ERING_SIZE];
603 };
604
605 struct ata_device {
606 struct ata_link *link;
607 unsigned int devno; /* 0 or 1 */
608 unsigned int horkage; /* List of broken features */
609 unsigned long flags; /* ATA_DFLAG_xxx */
610 struct scsi_device *sdev; /* attached SCSI device */
611 void *private_data;
612 #ifdef CONFIG_ATA_ACPI
613 acpi_handle acpi_handle;
614 union acpi_object *gtf_cache;
615 unsigned int gtf_filter;
616 #endif
617 struct device tdev;
618 /* n_sector is CLEAR_BEGIN, read comment above CLEAR_BEGIN */
619 u64 n_sectors; /* size of device, if ATA */
620 u64 n_native_sectors; /* native size, if ATA */
621 unsigned int class; /* ATA_DEV_xxx */
622 unsigned long unpark_deadline;
623
624 u8 pio_mode;
625 u8 dma_mode;
626 u8 xfer_mode;
627 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
628
629 unsigned int multi_count; /* sectors count for
630 READ/WRITE MULTIPLE */
631 unsigned int max_sectors; /* per-device max sectors */
632 unsigned int cdb_len;
633
634 /* per-dev xfer mask */
635 unsigned long pio_mask;
636 unsigned long mwdma_mask;
637 unsigned long udma_mask;
638
639 /* for CHS addressing */
640 u16 cylinders; /* Number of cylinders */
641 u16 heads; /* Number of heads */
642 u16 sectors; /* Number of sectors per track */
643
644 union {
645 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
646 u32 gscr[SATA_PMP_GSCR_DWORDS]; /* PMP GSCR block */
647 };
648
649 /* error history */
650 int spdn_cnt;
651 /* ering is CLEAR_END, read comment above CLEAR_END */
652 struct ata_ering ering;
653 };
654
655 /* Fields between ATA_DEVICE_CLEAR_BEGIN and ATA_DEVICE_CLEAR_END are
656 * cleared to zero on ata_dev_init().
657 */
658 #define ATA_DEVICE_CLEAR_BEGIN offsetof(struct ata_device, n_sectors)
659 #define ATA_DEVICE_CLEAR_END offsetof(struct ata_device, ering)
660
661 struct ata_eh_info {
662 struct ata_device *dev; /* offending device */
663 u32 serror; /* SError from LLDD */
664 unsigned int err_mask; /* port-wide err_mask */
665 unsigned int action; /* ATA_EH_* action mask */
666 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */
667 unsigned int flags; /* ATA_EHI_* flags */
668
669 unsigned int probe_mask;
670
671 char desc[ATA_EH_DESC_LEN];
672 int desc_len;
673 };
674
675 struct ata_eh_context {
676 struct ata_eh_info i;
677 int tries[ATA_MAX_DEVICES];
678 int cmd_timeout_idx[ATA_MAX_DEVICES]
679 [ATA_EH_CMD_TIMEOUT_TABLE_SIZE];
680 unsigned int classes[ATA_MAX_DEVICES];
681 unsigned int did_probe_mask;
682 unsigned int unloaded_mask;
683 unsigned int saved_ncq_enabled;
684 u8 saved_xfer_mode[ATA_MAX_DEVICES];
685 /* timestamp for the last reset attempt or success */
686 unsigned long last_reset;
687 };
688
689 struct ata_acpi_drive
690 {
691 u32 pio;
692 u32 dma;
693 } __packed;
694
695 struct ata_acpi_gtm {
696 struct ata_acpi_drive drive[2];
697 u32 flags;
698 } __packed;
699
700 struct ata_link {
701 struct ata_port *ap;
702 int pmp; /* port multiplier port # */
703
704 struct device tdev;
705 unsigned int active_tag; /* active tag on this link */
706 u32 sactive; /* active NCQ commands */
707
708 unsigned int flags; /* ATA_LFLAG_xxx */
709
710 u32 saved_scontrol; /* SControl on probe */
711 unsigned int hw_sata_spd_limit;
712 unsigned int sata_spd_limit;
713 unsigned int sata_spd; /* current SATA PHY speed */
714 enum ata_lpm_policy lpm_policy;
715
716 /* record runtime error info, protected by host_set lock */
717 struct ata_eh_info eh_info;
718 /* EH context */
719 struct ata_eh_context eh_context;
720
721 struct ata_device device[ATA_MAX_DEVICES];
722 };
723 #define ATA_LINK_CLEAR_BEGIN offsetof(struct ata_link, active_tag)
724 #define ATA_LINK_CLEAR_END offsetof(struct ata_link, device[0])
725
726 struct ata_port {
727 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */
728 struct ata_port_operations *ops;
729 spinlock_t *lock;
730 /* Flags owned by the EH context. Only EH should touch these once the
731 port is active */
732 unsigned long flags; /* ATA_FLAG_xxx */
733 /* Flags that change dynamically, protected by ap->lock */
734 unsigned int pflags; /* ATA_PFLAG_xxx */
735 unsigned int print_id; /* user visible unique port ID */
736 unsigned int port_no; /* 0 based port no. inside the host */
737
738 #ifdef CONFIG_ATA_SFF
739 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
740 u8 ctl; /* cache of ATA control register */
741 u8 last_ctl; /* Cache last written value */
742 struct ata_link* sff_pio_task_link; /* link currently used */
743 struct delayed_work sff_pio_task;
744 #ifdef CONFIG_ATA_BMDMA
745 struct ata_bmdma_prd *bmdma_prd; /* BMDMA SG list */
746 dma_addr_t bmdma_prd_dma; /* and its DMA mapping */
747 #endif /* CONFIG_ATA_BMDMA */
748 #endif /* CONFIG_ATA_SFF */
749
750 unsigned int pio_mask;
751 unsigned int mwdma_mask;
752 unsigned int udma_mask;
753 unsigned int cbl; /* cable type; ATA_CBL_xxx */
754
755 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
756 unsigned long qc_allocated;
757 unsigned int qc_active;
758 int nr_active_links; /* #links with active qcs */
759
760 struct ata_link link; /* host default link */
761 struct ata_link *slave_link; /* see ata_slave_link_init() */
762
763 int nr_pmp_links; /* nr of available PMP links */
764 struct ata_link *pmp_link; /* array of PMP links */
765 struct ata_link *excl_link; /* for PMP qc exclusion */
766
767 struct ata_port_stats stats;
768 struct ata_host *host;
769 struct device *dev;
770 struct device tdev;
771
772 struct mutex scsi_scan_mutex;
773 struct delayed_work hotplug_task;
774 struct work_struct scsi_rescan_task;
775
776 unsigned int hsm_task_state;
777
778 u32 msg_enable;
779 struct list_head eh_done_q;
780 wait_queue_head_t eh_wait_q;
781 int eh_tries;
782 struct completion park_req_pending;
783
784 pm_message_t pm_mesg;
785 int *pm_result;
786 enum ata_lpm_policy target_lpm_policy;
787
788 struct timer_list fastdrain_timer;
789 unsigned long fastdrain_cnt;
790
791 int em_message_type;
792 void *private_data;
793
794 #ifdef CONFIG_ATA_ACPI
795 acpi_handle acpi_handle;
796 struct ata_acpi_gtm __acpi_init_gtm; /* use ata_acpi_init_gtm() */
797 #endif
798 /* owned by EH */
799 u8 sector_buf[ATA_SECT_SIZE] ____cacheline_aligned;
800 };
801
802 /* The following initializer overrides a method to NULL whether one of
803 * its parent has the method defined or not. This is equivalent to
804 * ERR_PTR(-ENOENT). Unfortunately, ERR_PTR doesn't render a constant
805 * expression and thus can't be used as an initializer.
806 */
807 #define ATA_OP_NULL (void *)(unsigned long)(-ENOENT)
808
809 struct ata_port_operations {
810 /*
811 * Command execution
812 */
813 int (*qc_defer)(struct ata_queued_cmd *qc);
814 int (*check_atapi_dma)(struct ata_queued_cmd *qc);
815 void (*qc_prep)(struct ata_queued_cmd *qc);
816 unsigned int (*qc_issue)(struct ata_queued_cmd *qc);
817 bool (*qc_fill_rtf)(struct ata_queued_cmd *qc);
818
819 /*
820 * Configuration and exception handling
821 */
822 int (*cable_detect)(struct ata_port *ap);
823 unsigned long (*mode_filter)(struct ata_device *dev, unsigned long xfer_mask);
824 void (*set_piomode)(struct ata_port *ap, struct ata_device *dev);
825 void (*set_dmamode)(struct ata_port *ap, struct ata_device *dev);
826 int (*set_mode)(struct ata_link *link, struct ata_device **r_failed_dev);
827 unsigned int (*read_id)(struct ata_device *dev, struct ata_taskfile *tf, u16 *id);
828
829 void (*dev_config)(struct ata_device *dev);
830
831 void (*freeze)(struct ata_port *ap);
832 void (*thaw)(struct ata_port *ap);
833 ata_prereset_fn_t prereset;
834 ata_reset_fn_t softreset;
835 ata_reset_fn_t hardreset;
836 ata_postreset_fn_t postreset;
837 ata_prereset_fn_t pmp_prereset;
838 ata_reset_fn_t pmp_softreset;
839 ata_reset_fn_t pmp_hardreset;
840 ata_postreset_fn_t pmp_postreset;
841 void (*error_handler)(struct ata_port *ap);
842 void (*lost_interrupt)(struct ata_port *ap);
843 void (*post_internal_cmd)(struct ata_queued_cmd *qc);
844
845 /*
846 * Optional features
847 */
848 int (*scr_read)(struct ata_link *link, unsigned int sc_reg, u32 *val);
849 int (*scr_write)(struct ata_link *link, unsigned int sc_reg, u32 val);
850 void (*pmp_attach)(struct ata_port *ap);
851 void (*pmp_detach)(struct ata_port *ap);
852 int (*set_lpm)(struct ata_link *link, enum ata_lpm_policy policy,
853 unsigned hints);
854
855 /*
856 * Start, stop, suspend and resume
857 */
858 int (*port_suspend)(struct ata_port *ap, pm_message_t mesg);
859 int (*port_resume)(struct ata_port *ap);
860 int (*port_start)(struct ata_port *ap);
861 void (*port_stop)(struct ata_port *ap);
862 void (*host_stop)(struct ata_host *host);
863
864 #ifdef CONFIG_ATA_SFF
865 /*
866 * SFF / taskfile oriented ops
867 */
868 void (*sff_dev_select)(struct ata_port *ap, unsigned int device);
869 void (*sff_set_devctl)(struct ata_port *ap, u8 ctl);
870 u8 (*sff_check_status)(struct ata_port *ap);
871 u8 (*sff_check_altstatus)(struct ata_port *ap);
872 void (*sff_tf_load)(struct ata_port *ap, const struct ata_taskfile *tf);
873 void (*sff_tf_read)(struct ata_port *ap, struct ata_taskfile *tf);
874 void (*sff_exec_command)(struct ata_port *ap,
875 const struct ata_taskfile *tf);
876 unsigned int (*sff_data_xfer)(struct ata_device *dev,
877 unsigned char *buf, unsigned int buflen, int rw);
878 void (*sff_irq_on)(struct ata_port *);
879 bool (*sff_irq_check)(struct ata_port *);
880 void (*sff_irq_clear)(struct ata_port *);
881 void (*sff_drain_fifo)(struct ata_queued_cmd *qc);
882
883 #ifdef CONFIG_ATA_BMDMA
884 void (*bmdma_setup)(struct ata_queued_cmd *qc);
885 void (*bmdma_start)(struct ata_queued_cmd *qc);
886 void (*bmdma_stop)(struct ata_queued_cmd *qc);
887 u8 (*bmdma_status)(struct ata_port *ap);
888 #endif /* CONFIG_ATA_BMDMA */
889 #endif /* CONFIG_ATA_SFF */
890
891 ssize_t (*em_show)(struct ata_port *ap, char *buf);
892 ssize_t (*em_store)(struct ata_port *ap, const char *message,
893 size_t size);
894 ssize_t (*sw_activity_show)(struct ata_device *dev, char *buf);
895 ssize_t (*sw_activity_store)(struct ata_device *dev,
896 enum sw_activity val);
897 /*
898 * Obsolete
899 */
900 void (*phy_reset)(struct ata_port *ap);
901 void (*eng_timeout)(struct ata_port *ap);
902
903 /*
904 * ->inherits must be the last field and all the preceding
905 * fields must be pointers.
906 */
907 const struct ata_port_operations *inherits;
908 };
909
910 struct ata_port_info {
911 unsigned long flags;
912 unsigned long link_flags;
913 unsigned long pio_mask;
914 unsigned long mwdma_mask;
915 unsigned long udma_mask;
916 struct ata_port_operations *port_ops;
917 void *private_data;
918 };
919
920 struct ata_timing {
921 unsigned short mode; /* ATA mode */
922 unsigned short setup; /* t1 */
923 unsigned short act8b; /* t2 for 8-bit I/O */
924 unsigned short rec8b; /* t2i for 8-bit I/O */
925 unsigned short cyc8b; /* t0 for 8-bit I/O */
926 unsigned short active; /* t2 or tD */
927 unsigned short recover; /* t2i or tK */
928 unsigned short dmack_hold; /* tj */
929 unsigned short cycle; /* t0 */
930 unsigned short udma; /* t2CYCTYP/2 */
931 };
932
933 /*
934 * Core layer - drivers/ata/libata-core.c
935 */
936 extern const unsigned long sata_deb_timing_normal[];
937 extern const unsigned long sata_deb_timing_hotplug[];
938 extern const unsigned long sata_deb_timing_long[];
939
940 extern struct ata_port_operations ata_dummy_port_ops;
941 extern const struct ata_port_info ata_dummy_port_info;
942
943 static inline const unsigned long *
944 sata_ehc_deb_timing(struct ata_eh_context *ehc)
945 {
946 if (ehc->i.flags & ATA_EHI_HOTPLUGGED)
947 return sata_deb_timing_hotplug;
948 else
949 return sata_deb_timing_normal;
950 }
951
952 static inline int ata_port_is_dummy(struct ata_port *ap)
953 {
954 return ap->ops == &ata_dummy_port_ops;
955 }
956
957 extern int sata_set_spd(struct ata_link *link);
958 extern int ata_std_prereset(struct ata_link *link, unsigned long deadline);
959 extern int ata_wait_after_reset(struct ata_link *link, unsigned long deadline,
960 int (*check_ready)(struct ata_link *link));
961 extern int sata_link_debounce(struct ata_link *link,
962 const unsigned long *params, unsigned long deadline);
963 extern int sata_link_resume(struct ata_link *link, const unsigned long *params,
964 unsigned long deadline);
965 extern int sata_link_scr_lpm(struct ata_link *link, enum ata_lpm_policy policy,
966 bool spm_wakeup);
967 extern int sata_link_hardreset(struct ata_link *link,
968 const unsigned long *timing, unsigned long deadline,
969 bool *online, int (*check_ready)(struct ata_link *));
970 extern int sata_std_hardreset(struct ata_link *link, unsigned int *class,
971 unsigned long deadline);
972 extern void ata_std_postreset(struct ata_link *link, unsigned int *classes);
973
974 extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports);
975 extern struct ata_host *ata_host_alloc_pinfo(struct device *dev,
976 const struct ata_port_info * const * ppi, int n_ports);
977 extern int ata_slave_link_init(struct ata_port *ap);
978 extern int ata_host_start(struct ata_host *host);
979 extern int ata_host_register(struct ata_host *host,
980 struct scsi_host_template *sht);
981 extern int ata_host_activate(struct ata_host *host, int irq,
982 irq_handler_t irq_handler, unsigned long irq_flags,
983 struct scsi_host_template *sht);
984 extern void ata_host_detach(struct ata_host *host);
985 extern void ata_host_init(struct ata_host *, struct device *,
986 unsigned long, struct ata_port_operations *);
987 extern int ata_scsi_detect(struct scsi_host_template *sht);
988 extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
989 extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *));
990 extern int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *dev,
991 int cmd, void __user *arg);
992 extern void ata_sas_port_destroy(struct ata_port *);
993 extern struct ata_port *ata_sas_port_alloc(struct ata_host *,
994 struct ata_port_info *, struct Scsi_Host *);
995 extern int ata_sas_port_init(struct ata_port *);
996 extern int ata_sas_port_start(struct ata_port *ap);
997 extern void ata_sas_port_stop(struct ata_port *ap);
998 extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *);
999 extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
1000 struct ata_port *ap);
1001 extern int sata_scr_valid(struct ata_link *link);
1002 extern int sata_scr_read(struct ata_link *link, int reg, u32 *val);
1003 extern int sata_scr_write(struct ata_link *link, int reg, u32 val);
1004 extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val);
1005 extern bool ata_link_online(struct ata_link *link);
1006 extern bool ata_link_offline(struct ata_link *link);
1007 #ifdef CONFIG_PM
1008 extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg);
1009 extern void ata_host_resume(struct ata_host *host);
1010 #endif
1011 extern int ata_ratelimit(void);
1012 extern void ata_msleep(struct ata_port *ap, unsigned int msecs);
1013 extern u32 ata_wait_register(struct ata_port *ap, void __iomem *reg, u32 mask,
1014 u32 val, unsigned long interval, unsigned long timeout);
1015 extern int atapi_cmd_type(u8 opcode);
1016 extern void ata_tf_to_fis(const struct ata_taskfile *tf,
1017 u8 pmp, int is_cmd, u8 *fis);
1018 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
1019 extern unsigned long ata_pack_xfermask(unsigned long pio_mask,
1020 unsigned long mwdma_mask, unsigned long udma_mask);
1021 extern void ata_unpack_xfermask(unsigned long xfer_mask,
1022 unsigned long *pio_mask, unsigned long *mwdma_mask,
1023 unsigned long *udma_mask);
1024 extern u8 ata_xfer_mask2mode(unsigned long xfer_mask);
1025 extern unsigned long ata_xfer_mode2mask(u8 xfer_mode);
1026 extern int ata_xfer_mode2shift(unsigned long xfer_mode);
1027 extern const char *ata_mode_string(unsigned long xfer_mask);
1028 extern unsigned long ata_id_xfermask(const u16 *id);
1029 extern int ata_std_qc_defer(struct ata_queued_cmd *qc);
1030 extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
1031 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
1032 unsigned int n_elem);
1033 extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
1034 extern void ata_dev_disable(struct ata_device *adev);
1035 extern void ata_id_string(const u16 *id, unsigned char *s,
1036 unsigned int ofs, unsigned int len);
1037 extern void ata_id_c_string(const u16 *id, unsigned char *s,
1038 unsigned int ofs, unsigned int len);
1039 extern unsigned int ata_do_dev_read_id(struct ata_device *dev,
1040 struct ata_taskfile *tf, u16 *id);
1041 extern void ata_qc_complete(struct ata_queued_cmd *qc);
1042 extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active);
1043 extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
1044 void (*done)(struct scsi_cmnd *));
1045 extern int ata_std_bios_param(struct scsi_device *sdev,
1046 struct block_device *bdev,
1047 sector_t capacity, int geom[]);
1048 extern void ata_scsi_unlock_native_capacity(struct scsi_device *sdev);
1049 extern int ata_scsi_slave_config(struct scsi_device *sdev);
1050 extern void ata_scsi_slave_destroy(struct scsi_device *sdev);
1051 extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
1052 int queue_depth, int reason);
1053 extern struct ata_device *ata_dev_pair(struct ata_device *adev);
1054 extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev);
1055
1056 extern int ata_cable_40wire(struct ata_port *ap);
1057 extern int ata_cable_80wire(struct ata_port *ap);
1058 extern int ata_cable_sata(struct ata_port *ap);
1059 extern int ata_cable_ignore(struct ata_port *ap);
1060 extern int ata_cable_unknown(struct ata_port *ap);
1061
1062 /* Timing helpers */
1063 extern unsigned int ata_pio_need_iordy(const struct ata_device *);
1064 extern const struct ata_timing *ata_timing_find_mode(u8 xfer_mode);
1065 extern int ata_timing_compute(struct ata_device *, unsigned short,
1066 struct ata_timing *, int, int);
1067 extern void ata_timing_merge(const struct ata_timing *,
1068 const struct ata_timing *, struct ata_timing *,
1069 unsigned int);
1070 extern u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle);
1071
1072 /* PCI */
1073 #ifdef CONFIG_PCI
1074 struct pci_dev;
1075
1076 struct pci_bits {
1077 unsigned int reg; /* PCI config register to read */
1078 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
1079 unsigned long mask;
1080 unsigned long val;
1081 };
1082
1083 extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
1084 extern void ata_pci_remove_one(struct pci_dev *pdev);
1085
1086 #ifdef CONFIG_PM
1087 extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg);
1088 extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev);
1089 extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
1090 extern int ata_pci_device_resume(struct pci_dev *pdev);
1091 #endif /* CONFIG_PM */
1092 #endif /* CONFIG_PCI */
1093
1094 /*
1095 * ACPI - drivers/ata/libata-acpi.c
1096 */
1097 #ifdef CONFIG_ATA_ACPI
1098 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
1099 {
1100 if (ap->pflags & ATA_PFLAG_INIT_GTM_VALID)
1101 return &ap->__acpi_init_gtm;
1102 return NULL;
1103 }
1104 int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm);
1105 int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *stm);
1106 unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev,
1107 const struct ata_acpi_gtm *gtm);
1108 int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm);
1109 #else
1110 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
1111 {
1112 return NULL;
1113 }
1114
1115 static inline int ata_acpi_stm(const struct ata_port *ap,
1116 struct ata_acpi_gtm *stm)
1117 {
1118 return -ENOSYS;
1119 }
1120
1121 static inline int ata_acpi_gtm(const struct ata_port *ap,
1122 struct ata_acpi_gtm *stm)
1123 {
1124 return -ENOSYS;
1125 }
1126
1127 static inline unsigned int ata_acpi_gtm_xfermask(struct ata_device *dev,
1128 const struct ata_acpi_gtm *gtm)
1129 {
1130 return 0;
1131 }
1132
1133 static inline int ata_acpi_cbl_80wire(struct ata_port *ap,
1134 const struct ata_acpi_gtm *gtm)
1135 {
1136 return 0;
1137 }
1138 #endif
1139
1140 /*
1141 * EH - drivers/ata/libata-eh.c
1142 */
1143 extern void ata_port_schedule_eh(struct ata_port *ap);
1144 extern int ata_link_abort(struct ata_link *link);
1145 extern int ata_port_abort(struct ata_port *ap);
1146 extern int ata_port_freeze(struct ata_port *ap);
1147 extern int sata_async_notification(struct ata_port *ap);
1148
1149 extern void ata_eh_freeze_port(struct ata_port *ap);
1150 extern void ata_eh_thaw_port(struct ata_port *ap);
1151
1152 extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
1153 extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
1154 extern void ata_eh_analyze_ncq_error(struct ata_link *link);
1155
1156 extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
1157 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
1158 ata_postreset_fn_t postreset);
1159 extern void ata_std_error_handler(struct ata_port *ap);
1160
1161 /*
1162 * Base operations to inherit from and initializers for sht
1163 *
1164 * Operations
1165 *
1166 * base : Common to all libata drivers.
1167 * sata : SATA controllers w/ native interface.
1168 * pmp : SATA controllers w/ PMP support.
1169 * sff : SFF ATA controllers w/o BMDMA support.
1170 * bmdma : SFF ATA controllers w/ BMDMA support.
1171 *
1172 * sht initializers
1173 *
1174 * BASE : Common to all libata drivers. The user must set
1175 * sg_tablesize and dma_boundary.
1176 * PIO : SFF ATA controllers w/ only PIO support.
1177 * BMDMA : SFF ATA controllers w/ BMDMA support. sg_tablesize and
1178 * dma_boundary are set to BMDMA limits.
1179 * NCQ : SATA controllers supporting NCQ. The user must set
1180 * sg_tablesize, dma_boundary and can_queue.
1181 */
1182 extern const struct ata_port_operations ata_base_port_ops;
1183 extern const struct ata_port_operations sata_port_ops;
1184 extern struct device_attribute *ata_common_sdev_attrs[];
1185
1186 #define ATA_BASE_SHT(drv_name) \
1187 .module = THIS_MODULE, \
1188 .name = drv_name, \
1189 .ioctl = ata_scsi_ioctl, \
1190 .queuecommand = ata_scsi_queuecmd, \
1191 .can_queue = ATA_DEF_QUEUE, \
1192 .this_id = ATA_SHT_THIS_ID, \
1193 .cmd_per_lun = ATA_SHT_CMD_PER_LUN, \
1194 .emulated = ATA_SHT_EMULATED, \
1195 .use_clustering = ATA_SHT_USE_CLUSTERING, \
1196 .proc_name = drv_name, \
1197 .slave_configure = ata_scsi_slave_config, \
1198 .slave_destroy = ata_scsi_slave_destroy, \
1199 .bios_param = ata_std_bios_param, \
1200 .unlock_native_capacity = ata_scsi_unlock_native_capacity, \
1201 .sdev_attrs = ata_common_sdev_attrs
1202
1203 #define ATA_NCQ_SHT(drv_name) \
1204 ATA_BASE_SHT(drv_name), \
1205 .change_queue_depth = ata_scsi_change_queue_depth
1206
1207 /*
1208 * PMP helpers
1209 */
1210 #ifdef CONFIG_SATA_PMP
1211 static inline bool sata_pmp_supported(struct ata_port *ap)
1212 {
1213 return ap->flags & ATA_FLAG_PMP;
1214 }
1215
1216 static inline bool sata_pmp_attached(struct ata_port *ap)
1217 {
1218 return ap->nr_pmp_links != 0;
1219 }
1220
1221 static inline int ata_is_host_link(const struct ata_link *link)
1222 {
1223 return link == &link->ap->link || link == link->ap->slave_link;
1224 }
1225 #else /* CONFIG_SATA_PMP */
1226 static inline bool sata_pmp_supported(struct ata_port *ap)
1227 {
1228 return false;
1229 }
1230
1231 static inline bool sata_pmp_attached(struct ata_port *ap)
1232 {
1233 return false;
1234 }
1235
1236 static inline int ata_is_host_link(const struct ata_link *link)
1237 {
1238 return 1;
1239 }
1240 #endif /* CONFIG_SATA_PMP */
1241
1242 static inline int sata_srst_pmp(struct ata_link *link)
1243 {
1244 if (sata_pmp_supported(link->ap) && ata_is_host_link(link))
1245 return SATA_PMP_CTRL_PORT;
1246 return link->pmp;
1247 }
1248
1249 /*
1250 * printk helpers
1251 */
1252 #define ata_port_printk(ap, lv, fmt, args...) \
1253 printk("%sata%u: "fmt, lv, (ap)->print_id , ##args)
1254
1255 #define ata_link_printk(link, lv, fmt, args...) do { \
1256 if (sata_pmp_attached((link)->ap) || (link)->ap->slave_link) \
1257 printk("%sata%u.%02u: "fmt, lv, (link)->ap->print_id, \
1258 (link)->pmp , ##args); \
1259 else \
1260 printk("%sata%u: "fmt, lv, (link)->ap->print_id , ##args); \
1261 } while(0)
1262
1263 #define ata_dev_printk(dev, lv, fmt, args...) \
1264 printk("%sata%u.%02u: "fmt, lv, (dev)->link->ap->print_id, \
1265 (dev)->link->pmp + (dev)->devno , ##args)
1266
1267 /*
1268 * ata_eh_info helpers
1269 */
1270 extern void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...)
1271 __attribute__ ((format (printf, 2, 3)));
1272 extern void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...)
1273 __attribute__ ((format (printf, 2, 3)));
1274 extern void ata_ehi_clear_desc(struct ata_eh_info *ehi);
1275
1276 static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
1277 {
1278 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
1279 ehi->flags |= ATA_EHI_HOTPLUGGED;
1280 ehi->action |= ATA_EH_RESET | ATA_EH_ENABLE_LINK;
1281 ehi->err_mask |= AC_ERR_ATA_BUS;
1282 }
1283
1284 /*
1285 * port description helpers
1286 */
1287 extern void ata_port_desc(struct ata_port *ap, const char *fmt, ...)
1288 __attribute__ ((format (printf, 2, 3)));
1289 #ifdef CONFIG_PCI
1290 extern void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset,
1291 const char *name);
1292 #endif
1293
1294 static inline unsigned int ata_tag_valid(unsigned int tag)
1295 {
1296 return (tag < ATA_MAX_QUEUE) ? 1 : 0;
1297 }
1298
1299 static inline unsigned int ata_tag_internal(unsigned int tag)
1300 {
1301 return tag == ATA_TAG_INTERNAL;
1302 }
1303
1304 /*
1305 * device helpers
1306 */
1307 static inline unsigned int ata_class_enabled(unsigned int class)
1308 {
1309 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI ||
1310 class == ATA_DEV_PMP || class == ATA_DEV_SEMB;
1311 }
1312
1313 static inline unsigned int ata_class_disabled(unsigned int class)
1314 {
1315 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP ||
1316 class == ATA_DEV_PMP_UNSUP || class == ATA_DEV_SEMB_UNSUP;
1317 }
1318
1319 static inline unsigned int ata_class_absent(unsigned int class)
1320 {
1321 return !ata_class_enabled(class) && !ata_class_disabled(class);
1322 }
1323
1324 static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
1325 {
1326 return ata_class_enabled(dev->class);
1327 }
1328
1329 static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
1330 {
1331 return ata_class_disabled(dev->class);
1332 }
1333
1334 static inline unsigned int ata_dev_absent(const struct ata_device *dev)
1335 {
1336 return ata_class_absent(dev->class);
1337 }
1338
1339 /*
1340 * link helpers
1341 */
1342 static inline int ata_link_max_devices(const struct ata_link *link)
1343 {
1344 if (ata_is_host_link(link) && link->ap->flags & ATA_FLAG_SLAVE_POSS)
1345 return 2;
1346 return 1;
1347 }
1348
1349 static inline int ata_link_active(struct ata_link *link)
1350 {
1351 return ata_tag_valid(link->active_tag) || link->sactive;
1352 }
1353
1354 /*
1355 * Iterators
1356 *
1357 * ATA_LITER_* constants are used to select link iteration mode and
1358 * ATA_DITER_* device iteration mode.
1359 *
1360 * For a custom iteration directly using ata_{link|dev}_next(), if
1361 * @link or @dev, respectively, is NULL, the first element is
1362 * returned. @dev and @link can be any valid device or link and the
1363 * next element according to the iteration mode will be returned.
1364 * After the last element, NULL is returned.
1365 */
1366 enum ata_link_iter_mode {
1367 ATA_LITER_EDGE, /* if present, PMP links only; otherwise,
1368 * host link. no slave link */
1369 ATA_LITER_HOST_FIRST, /* host link followed by PMP or slave links */
1370 ATA_LITER_PMP_FIRST, /* PMP links followed by host link,
1371 * slave link still comes after host link */
1372 };
1373
1374 enum ata_dev_iter_mode {
1375 ATA_DITER_ENABLED,
1376 ATA_DITER_ENABLED_REVERSE,
1377 ATA_DITER_ALL,
1378 ATA_DITER_ALL_REVERSE,
1379 };
1380
1381 extern struct ata_link *ata_link_next(struct ata_link *link,
1382 struct ata_port *ap,
1383 enum ata_link_iter_mode mode);
1384
1385 extern struct ata_device *ata_dev_next(struct ata_device *dev,
1386 struct ata_link *link,
1387 enum ata_dev_iter_mode mode);
1388
1389 /*
1390 * Shortcut notation for iterations
1391 *
1392 * ata_for_each_link() iterates over each link of @ap according to
1393 * @mode. @link points to the current link in the loop. @link is
1394 * NULL after loop termination. ata_for_each_dev() works the same way
1395 * except that it iterates over each device of @link.
1396 *
1397 * Note that the mode prefixes ATA_{L|D}ITER_ shouldn't need to be
1398 * specified when using the following shorthand notations. Only the
1399 * mode itself (EDGE, HOST_FIRST, ENABLED, etc...) should be
1400 * specified. This not only increases brevity but also makes it
1401 * impossible to use ATA_LITER_* for device iteration or vice-versa.
1402 */
1403 #define ata_for_each_link(link, ap, mode) \
1404 for ((link) = ata_link_next(NULL, (ap), ATA_LITER_##mode); (link); \
1405 (link) = ata_link_next((link), (ap), ATA_LITER_##mode))
1406
1407 #define ata_for_each_dev(dev, link, mode) \
1408 for ((dev) = ata_dev_next(NULL, (link), ATA_DITER_##mode); (dev); \
1409 (dev) = ata_dev_next((dev), (link), ATA_DITER_##mode))
1410
1411 /**
1412 * ata_ncq_enabled - Test whether NCQ is enabled
1413 * @dev: ATA device to test for
1414 *
1415 * LOCKING:
1416 * spin_lock_irqsave(host lock)
1417 *
1418 * RETURNS:
1419 * 1 if NCQ is enabled for @dev, 0 otherwise.
1420 */
1421 static inline int ata_ncq_enabled(struct ata_device *dev)
1422 {
1423 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF |
1424 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ;
1425 }
1426
1427 static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
1428 {
1429 qc->tf.ctl |= ATA_NIEN;
1430 }
1431
1432 static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap,
1433 unsigned int tag)
1434 {
1435 if (likely(ata_tag_valid(tag)))
1436 return &ap->qcmd[tag];
1437 return NULL;
1438 }
1439
1440 static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap,
1441 unsigned int tag)
1442 {
1443 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
1444
1445 if (unlikely(!qc) || !ap->ops->error_handler)
1446 return qc;
1447
1448 if ((qc->flags & (ATA_QCFLAG_ACTIVE |
1449 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE)
1450 return qc;
1451
1452 return NULL;
1453 }
1454
1455 static inline unsigned int ata_qc_raw_nbytes(struct ata_queued_cmd *qc)
1456 {
1457 return qc->nbytes - min(qc->extrabytes, qc->nbytes);
1458 }
1459
1460 static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
1461 {
1462 memset(tf, 0, sizeof(*tf));
1463
1464 #ifdef CONFIG_ATA_SFF
1465 tf->ctl = dev->link->ap->ctl;
1466 #else
1467 tf->ctl = ATA_DEVCTL_OBS;
1468 #endif
1469 if (dev->devno == 0)
1470 tf->device = ATA_DEVICE_OBS;
1471 else
1472 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
1473 }
1474
1475 static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
1476 {
1477 qc->dma_dir = DMA_NONE;
1478 qc->sg = NULL;
1479 qc->flags = 0;
1480 qc->cursg = NULL;
1481 qc->cursg_ofs = 0;
1482 qc->nbytes = qc->extrabytes = qc->curbytes = 0;
1483 qc->n_elem = 0;
1484 qc->err_mask = 0;
1485 qc->sect_size = ATA_SECT_SIZE;
1486
1487 ata_tf_init(qc->dev, &qc->tf);
1488
1489 /* init result_tf such that it indicates normal completion */
1490 qc->result_tf.command = ATA_DRDY;
1491 qc->result_tf.feature = 0;
1492 }
1493
1494 static inline int ata_try_flush_cache(const struct ata_device *dev)
1495 {
1496 return ata_id_wcache_enabled(dev->id) ||
1497 ata_id_has_flush(dev->id) ||
1498 ata_id_has_flush_ext(dev->id);
1499 }
1500
1501 static inline unsigned int ac_err_mask(u8 status)
1502 {
1503 if (status & (ATA_BUSY | ATA_DRQ))
1504 return AC_ERR_HSM;
1505 if (status & (ATA_ERR | ATA_DF))
1506 return AC_ERR_DEV;
1507 return 0;
1508 }
1509
1510 static inline unsigned int __ac_err_mask(u8 status)
1511 {
1512 unsigned int mask = ac_err_mask(status);
1513 if (mask == 0)
1514 return AC_ERR_OTHER;
1515 return mask;
1516 }
1517
1518 static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
1519 {
1520 return *(struct ata_port **)&host->hostdata[0];
1521 }
1522
1523 static inline int ata_check_ready(u8 status)
1524 {
1525 if (!(status & ATA_BUSY))
1526 return 1;
1527
1528 /* 0xff indicates either no device or device not ready */
1529 if (status == 0xff)
1530 return -ENODEV;
1531
1532 return 0;
1533 }
1534
1535 static inline unsigned long ata_deadline(unsigned long from_jiffies,
1536 unsigned long timeout_msecs)
1537 {
1538 return from_jiffies + msecs_to_jiffies(timeout_msecs);
1539 }
1540
1541 /* Don't open code these in drivers as there are traps. Firstly the range may
1542 change in future hardware and specs, secondly 0xFF means 'no DMA' but is
1543 > UDMA_0. Dyma ddreigiau */
1544
1545 static inline int ata_using_mwdma(struct ata_device *adev)
1546 {
1547 if (adev->dma_mode >= XFER_MW_DMA_0 && adev->dma_mode <= XFER_MW_DMA_4)
1548 return 1;
1549 return 0;
1550 }
1551
1552 static inline int ata_using_udma(struct ata_device *adev)
1553 {
1554 if (adev->dma_mode >= XFER_UDMA_0 && adev->dma_mode <= XFER_UDMA_7)
1555 return 1;
1556 return 0;
1557 }
1558
1559 static inline int ata_dma_enabled(struct ata_device *adev)
1560 {
1561 return (adev->dma_mode == 0xFF ? 0 : 1);
1562 }
1563
1564 /**************************************************************************
1565 * PMP - drivers/ata/libata-pmp.c
1566 */
1567 #ifdef CONFIG_SATA_PMP
1568
1569 extern const struct ata_port_operations sata_pmp_port_ops;
1570
1571 extern int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc);
1572 extern void sata_pmp_error_handler(struct ata_port *ap);
1573
1574 #else /* CONFIG_SATA_PMP */
1575
1576 #define sata_pmp_port_ops sata_port_ops
1577 #define sata_pmp_qc_defer_cmd_switch ata_std_qc_defer
1578 #define sata_pmp_error_handler ata_std_error_handler
1579
1580 #endif /* CONFIG_SATA_PMP */
1581
1582
1583 /**************************************************************************
1584 * SFF - drivers/ata/libata-sff.c
1585 */
1586 #ifdef CONFIG_ATA_SFF
1587
1588 extern const struct ata_port_operations ata_sff_port_ops;
1589 extern const struct ata_port_operations ata_bmdma32_port_ops;
1590
1591 /* PIO only, sg_tablesize and dma_boundary limits can be removed */
1592 #define ATA_PIO_SHT(drv_name) \
1593 ATA_BASE_SHT(drv_name), \
1594 .sg_tablesize = LIBATA_MAX_PRD, \
1595 .dma_boundary = ATA_DMA_BOUNDARY
1596
1597 extern void ata_sff_dev_select(struct ata_port *ap, unsigned int device);
1598 extern u8 ata_sff_check_status(struct ata_port *ap);
1599 extern void ata_sff_pause(struct ata_port *ap);
1600 extern void ata_sff_dma_pause(struct ata_port *ap);
1601 extern int ata_sff_busy_sleep(struct ata_port *ap,
1602 unsigned long timeout_pat, unsigned long timeout);
1603 extern int ata_sff_wait_ready(struct ata_link *link, unsigned long deadline);
1604 extern void ata_sff_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
1605 extern void ata_sff_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
1606 extern void ata_sff_exec_command(struct ata_port *ap,
1607 const struct ata_taskfile *tf);
1608 extern unsigned int ata_sff_data_xfer(struct ata_device *dev,
1609 unsigned char *buf, unsigned int buflen, int rw);
1610 extern unsigned int ata_sff_data_xfer32(struct ata_device *dev,
1611 unsigned char *buf, unsigned int buflen, int rw);
1612 extern unsigned int ata_sff_data_xfer_noirq(struct ata_device *dev,
1613 unsigned char *buf, unsigned int buflen, int rw);
1614 extern void ata_sff_irq_on(struct ata_port *ap);
1615 extern void ata_sff_irq_clear(struct ata_port *ap);
1616 extern int ata_sff_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
1617 u8 status, int in_wq);
1618 extern void ata_sff_queue_pio_task(struct ata_link *link, unsigned long delay);
1619 extern unsigned int ata_sff_qc_issue(struct ata_queued_cmd *qc);
1620 extern bool ata_sff_qc_fill_rtf(struct ata_queued_cmd *qc);
1621 extern unsigned int ata_sff_port_intr(struct ata_port *ap,
1622 struct ata_queued_cmd *qc);
1623 extern irqreturn_t ata_sff_interrupt(int irq, void *dev_instance);
1624 extern void ata_sff_lost_interrupt(struct ata_port *ap);
1625 extern void ata_sff_freeze(struct ata_port *ap);
1626 extern void ata_sff_thaw(struct ata_port *ap);
1627 extern int ata_sff_prereset(struct ata_link *link, unsigned long deadline);
1628 extern unsigned int ata_sff_dev_classify(struct ata_device *dev, int present,
1629 u8 *r_err);
1630 extern int ata_sff_wait_after_reset(struct ata_link *link, unsigned int devmask,
1631 unsigned long deadline);
1632 extern int ata_sff_softreset(struct ata_link *link, unsigned int *classes,
1633 unsigned long deadline);
1634 extern int sata_sff_hardreset(struct ata_link *link, unsigned int *class,
1635 unsigned long deadline);
1636 extern void ata_sff_postreset(struct ata_link *link, unsigned int *classes);
1637 extern void ata_sff_drain_fifo(struct ata_queued_cmd *qc);
1638 extern void ata_sff_error_handler(struct ata_port *ap);
1639 extern void ata_sff_std_ports(struct ata_ioports *ioaddr);
1640 #ifdef CONFIG_PCI
1641 extern int ata_pci_sff_init_host(struct ata_host *host);
1642 extern int ata_pci_sff_prepare_host(struct pci_dev *pdev,
1643 const struct ata_port_info * const * ppi,
1644 struct ata_host **r_host);
1645 extern int ata_pci_sff_activate_host(struct ata_host *host,
1646 irq_handler_t irq_handler,
1647 struct scsi_host_template *sht);
1648 extern int ata_pci_sff_init_one(struct pci_dev *pdev,
1649 const struct ata_port_info * const * ppi,
1650 struct scsi_host_template *sht, void *host_priv, int hflags);
1651 #endif /* CONFIG_PCI */
1652
1653 #ifdef CONFIG_ATA_BMDMA
1654
1655 extern const struct ata_port_operations ata_bmdma_port_ops;
1656
1657 #define ATA_BMDMA_SHT(drv_name) \
1658 ATA_BASE_SHT(drv_name), \
1659 .sg_tablesize = LIBATA_MAX_PRD, \
1660 .dma_boundary = ATA_DMA_BOUNDARY
1661
1662 extern void ata_bmdma_qc_prep(struct ata_queued_cmd *qc);
1663 extern unsigned int ata_bmdma_qc_issue(struct ata_queued_cmd *qc);
1664 extern void ata_bmdma_dumb_qc_prep(struct ata_queued_cmd *qc);
1665 extern unsigned int ata_bmdma_port_intr(struct ata_port *ap,
1666 struct ata_queued_cmd *qc);
1667 extern irqreturn_t ata_bmdma_interrupt(int irq, void *dev_instance);
1668 extern void ata_bmdma_error_handler(struct ata_port *ap);
1669 extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc);
1670 extern void ata_bmdma_irq_clear(struct ata_port *ap);
1671 extern void ata_bmdma_setup(struct ata_queued_cmd *qc);
1672 extern void ata_bmdma_start(struct ata_queued_cmd *qc);
1673 extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
1674 extern u8 ata_bmdma_status(struct ata_port *ap);
1675 extern int ata_bmdma_port_start(struct ata_port *ap);
1676 extern int ata_bmdma_port_start32(struct ata_port *ap);
1677
1678 #ifdef CONFIG_PCI
1679 extern int ata_pci_bmdma_clear_simplex(struct pci_dev *pdev);
1680 extern void ata_pci_bmdma_init(struct ata_host *host);
1681 extern int ata_pci_bmdma_prepare_host(struct pci_dev *pdev,
1682 const struct ata_port_info * const * ppi,
1683 struct ata_host **r_host);
1684 extern int ata_pci_bmdma_init_one(struct pci_dev *pdev,
1685 const struct ata_port_info * const * ppi,
1686 struct scsi_host_template *sht,
1687 void *host_priv, int hflags);
1688 #endif /* CONFIG_PCI */
1689 #endif /* CONFIG_ATA_BMDMA */
1690
1691 /**
1692 * ata_sff_busy_wait - Wait for a port status register
1693 * @ap: Port to wait for.
1694 * @bits: bits that must be clear
1695 * @max: number of 10uS waits to perform
1696 *
1697 * Waits up to max*10 microseconds for the selected bits in the port's
1698 * status register to be cleared.
1699 * Returns final value of status register.
1700 *
1701 * LOCKING:
1702 * Inherited from caller.
1703 */
1704 static inline u8 ata_sff_busy_wait(struct ata_port *ap, unsigned int bits,
1705 unsigned int max)
1706 {
1707 u8 status;
1708
1709 do {
1710 udelay(10);
1711 status = ap->ops->sff_check_status(ap);
1712 max--;
1713 } while (status != 0xff && (status & bits) && (max > 0));
1714
1715 return status;
1716 }
1717
1718 /**
1719 * ata_wait_idle - Wait for a port to be idle.
1720 * @ap: Port to wait for.
1721 *
1722 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
1723 * Returns final value of status register.
1724 *
1725 * LOCKING:
1726 * Inherited from caller.
1727 */
1728 static inline u8 ata_wait_idle(struct ata_port *ap)
1729 {
1730 u8 status = ata_sff_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
1731
1732 #ifdef ATA_DEBUG
1733 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ)))
1734 ata_port_printk(ap, KERN_DEBUG, "abnormal Status 0x%X\n",
1735 status);
1736 #endif
1737
1738 return status;
1739 }
1740 #endif /* CONFIG_ATA_SFF */
1741
1742 #endif /* __LINUX_LIBATA_H__ */
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