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ARM: 6941/1: cache: ensure MVA is cacheline aligned in flush_kern_dcache_area
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / include / linux / libata.h
blob1f000807847d287dca618f3d7a330e568606bbfd
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 ATA_FLAG_NO_DIPM = (1 << 23), /* host not happy with DIPM */
207
208 /* bits 24:31 of ap->flags are reserved for LLD specific flags */
209
210
211 /* struct ata_port pflags */
212 ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */
213 ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */
214 ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */
215 ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */
216 ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */
217 ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */
218 ATA_PFLAG_INITIALIZING = (1 << 7), /* being initialized, don't touch */
219 ATA_PFLAG_RESETTING = (1 << 8), /* reset in progress */
220 ATA_PFLAG_UNLOADING = (1 << 9), /* driver is being unloaded */
221 ATA_PFLAG_UNLOADED = (1 << 10), /* driver is unloaded */
222
223 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */
224 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */
225 ATA_PFLAG_INIT_GTM_VALID = (1 << 19), /* initial gtm data valid */
226
227 ATA_PFLAG_PIO32 = (1 << 20), /* 32bit PIO */
228 ATA_PFLAG_PIO32CHANGE = (1 << 21), /* 32bit PIO can be turned on/off */
229
230 /* struct ata_queued_cmd flags */
231 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */
232 ATA_QCFLAG_DMAMAP = (1 << 1), /* SG table is DMA mapped */
233 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */
234 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */
235 ATA_QCFLAG_CLEAR_EXCL = (1 << 5), /* clear excl_link on completion */
236 ATA_QCFLAG_QUIET = (1 << 6), /* don't report device error */
237 ATA_QCFLAG_RETRY = (1 << 7), /* retry after failure */
238
239 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */
240 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */
241 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */
242
243 /* host set flags */
244 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */
245 ATA_HOST_STARTED = (1 << 1), /* Host started */
246 ATA_HOST_PARALLEL_SCAN = (1 << 2), /* Ports on this host can be scanned in parallel */
247
248 /* bits 24:31 of host->flags are reserved for LLD specific flags */
249
250 /* various lengths of time */
251 ATA_TMOUT_BOOT = 30000, /* heuristic */
252 ATA_TMOUT_BOOT_QUICK = 7000, /* heuristic */
253 ATA_TMOUT_INTERNAL_QUICK = 5000,
254 ATA_TMOUT_MAX_PARK = 30000,
255
256 /*
257 * GoVault needs 2s and iVDR disk HHD424020F7SV00 800ms. 2s
258 * is too much without parallel probing. Use 2s if parallel
259 * probing is available, 800ms otherwise.
260 */
261 ATA_TMOUT_FF_WAIT_LONG = 2000,
262 ATA_TMOUT_FF_WAIT = 800,
263
264 /* Spec mandates to wait for ">= 2ms" before checking status
265 * after reset. We wait 150ms, because that was the magic
266 * delay used for ATAPI devices in Hale Landis's ATADRVR, for
267 * the period of time between when the ATA command register is
268 * written, and then status is checked. Because waiting for
269 * "a while" before checking status is fine, post SRST, we
270 * perform this magic delay here as well.
271 *
272 * Old drivers/ide uses the 2mS rule and then waits for ready.
273 */
274 ATA_WAIT_AFTER_RESET = 150,
275
276 /* If PMP is supported, we have to do follow-up SRST. As some
277 * PMPs don't send D2H Reg FIS after hardreset, LLDs are
278 * advised to wait only for the following duration before
279 * doing SRST.
280 */
281 ATA_TMOUT_PMP_SRST_WAIT = 5000,
282
283 /* ATA bus states */
284 BUS_UNKNOWN = 0,
285 BUS_DMA = 1,
286 BUS_IDLE = 2,
287 BUS_NOINTR = 3,
288 BUS_NODATA = 4,
289 BUS_TIMER = 5,
290 BUS_PIO = 6,
291 BUS_EDD = 7,
292 BUS_IDENTIFY = 8,
293 BUS_PACKET = 9,
294
295 /* SATA port states */
296 PORT_UNKNOWN = 0,
297 PORT_ENABLED = 1,
298 PORT_DISABLED = 2,
299
300 /* encoding various smaller bitmaps into a single
301 * unsigned long bitmap
302 */
303 ATA_NR_PIO_MODES = 7,
304 ATA_NR_MWDMA_MODES = 5,
305 ATA_NR_UDMA_MODES = 8,
306
307 ATA_SHIFT_PIO = 0,
308 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_NR_PIO_MODES,
309 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_NR_MWDMA_MODES,
310
311 /* size of buffer to pad xfers ending on unaligned boundaries */
312 ATA_DMA_PAD_SZ = 4,
313
314 /* ering size */
315 ATA_ERING_SIZE = 32,
316
317 /* return values for ->qc_defer */
318 ATA_DEFER_LINK = 1,
319 ATA_DEFER_PORT = 2,
320
321 /* desc_len for ata_eh_info and context */
322 ATA_EH_DESC_LEN = 80,
323
324 /* reset / recovery action types */
325 ATA_EH_REVALIDATE = (1 << 0),
326 ATA_EH_SOFTRESET = (1 << 1), /* meaningful only in ->prereset */
327 ATA_EH_HARDRESET = (1 << 2), /* meaningful only in ->prereset */
328 ATA_EH_RESET = ATA_EH_SOFTRESET | ATA_EH_HARDRESET,
329 ATA_EH_ENABLE_LINK = (1 << 3),
330 ATA_EH_PARK = (1 << 5), /* unload heads and stop I/O */
331
332 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE | ATA_EH_PARK,
333 ATA_EH_ALL_ACTIONS = ATA_EH_REVALIDATE | ATA_EH_RESET |
334 ATA_EH_ENABLE_LINK,
335
336 /* ata_eh_info->flags */
337 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */
338 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */
339 ATA_EHI_QUIET = (1 << 3), /* be quiet */
340 ATA_EHI_NO_RECOVERY = (1 << 4), /* no recovery */
341
342 ATA_EHI_DID_SOFTRESET = (1 << 16), /* already soft-reset this port */
343 ATA_EHI_DID_HARDRESET = (1 << 17), /* already soft-reset this port */
344 ATA_EHI_PRINTINFO = (1 << 18), /* print configuration info */
345 ATA_EHI_SETMODE = (1 << 19), /* configure transfer mode */
346 ATA_EHI_POST_SETMODE = (1 << 20), /* revalidating after setmode */
347
348 ATA_EHI_DID_RESET = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET,
349
350 /* mask of flags to transfer *to* the slave link */
351 ATA_EHI_TO_SLAVE_MASK = ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET,
352
353 /* max tries if error condition is still set after ->error_handler */
354 ATA_EH_MAX_TRIES = 5,
355
356 /* sometimes resuming a link requires several retries */
357 ATA_LINK_RESUME_TRIES = 5,
358
359 /* how hard are we gonna try to probe/recover devices */
360 ATA_PROBE_MAX_TRIES = 3,
361 ATA_EH_DEV_TRIES = 3,
362 ATA_EH_PMP_TRIES = 5,
363 ATA_EH_PMP_LINK_TRIES = 3,
364
365 SATA_PMP_RW_TIMEOUT = 3000, /* PMP read/write timeout */
366
367 /* This should match the actual table size of
368 * ata_eh_cmd_timeout_table in libata-eh.c.
369 */
370 ATA_EH_CMD_TIMEOUT_TABLE_SIZE = 6,
371
372 /* Horkage types. May be set by libata or controller on drives
373 (some horkage may be drive/controller pair dependant */
374
375 ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */
376 ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */
377 ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */
378 ATA_HORKAGE_MAX_SEC_128 = (1 << 3), /* Limit max sects to 128 */
379 ATA_HORKAGE_BROKEN_HPA = (1 << 4), /* Broken HPA */
380 ATA_HORKAGE_DISABLE = (1 << 5), /* Disable it */
381 ATA_HORKAGE_HPA_SIZE = (1 << 6), /* native size off by one */
382 ATA_HORKAGE_IVB = (1 << 8), /* cbl det validity bit bugs */
383 ATA_HORKAGE_STUCK_ERR = (1 << 9), /* stuck ERR on next PACKET */
384 ATA_HORKAGE_BRIDGE_OK = (1 << 10), /* no bridge limits */
385 ATA_HORKAGE_ATAPI_MOD16_DMA = (1 << 11), /* use ATAPI DMA for commands
386 not multiple of 16 bytes */
387 ATA_HORKAGE_FIRMWARE_WARN = (1 << 12), /* firmware update warning */
388 ATA_HORKAGE_1_5_GBPS = (1 << 13), /* force 1.5 Gbps */
389 ATA_HORKAGE_NOSETXFER = (1 << 14), /* skip SETXFER, SATA only */
390 ATA_HORKAGE_BROKEN_FPDMA_AA = (1 << 15), /* skip AA */
391 ATA_HORKAGE_DUMP_ID = (1 << 16), /* dump IDENTIFY data */
392
393 /* DMA mask for user DMA control: User visible values; DO NOT
394 renumber */
395 ATA_DMA_MASK_ATA = (1 << 0), /* DMA on ATA Disk */
396 ATA_DMA_MASK_ATAPI = (1 << 1), /* DMA on ATAPI */
397 ATA_DMA_MASK_CFA = (1 << 2), /* DMA on CF Card */
398
399 /* ATAPI command types */
400 ATAPI_READ = 0, /* READs */
401 ATAPI_WRITE = 1, /* WRITEs */
402 ATAPI_READ_CD = 2, /* READ CD [MSF] */
403 ATAPI_PASS_THRU = 3, /* SAT pass-thru */
404 ATAPI_MISC = 4, /* the rest */
405
406 /* Timing constants */
407 ATA_TIMING_SETUP = (1 << 0),
408 ATA_TIMING_ACT8B = (1 << 1),
409 ATA_TIMING_REC8B = (1 << 2),
410 ATA_TIMING_CYC8B = (1 << 3),
411 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
412 ATA_TIMING_CYC8B,
413 ATA_TIMING_ACTIVE = (1 << 4),
414 ATA_TIMING_RECOVER = (1 << 5),
415 ATA_TIMING_DMACK_HOLD = (1 << 6),
416 ATA_TIMING_CYCLE = (1 << 7),
417 ATA_TIMING_UDMA = (1 << 8),
418 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
419 ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
420 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
421 ATA_TIMING_DMACK_HOLD | ATA_TIMING_CYCLE |
422 ATA_TIMING_UDMA,
423
424 /* ACPI constants */
425 ATA_ACPI_FILTER_SETXFER = 1 << 0,
426 ATA_ACPI_FILTER_LOCK = 1 << 1,
427 ATA_ACPI_FILTER_DIPM = 1 << 2,
428 ATA_ACPI_FILTER_FPDMA_OFFSET = 1 << 3, /* FPDMA non-zero offset */
429 ATA_ACPI_FILTER_FPDMA_AA = 1 << 4, /* FPDMA auto activate */
430
431 ATA_ACPI_FILTER_DEFAULT = ATA_ACPI_FILTER_SETXFER |
432 ATA_ACPI_FILTER_LOCK |
433 ATA_ACPI_FILTER_DIPM,
434 };
435
436 enum ata_xfer_mask {
437 ATA_MASK_PIO = ((1LU << ATA_NR_PIO_MODES) - 1)
438 << ATA_SHIFT_PIO,
439 ATA_MASK_MWDMA = ((1LU << ATA_NR_MWDMA_MODES) - 1)
440 << ATA_SHIFT_MWDMA,
441 ATA_MASK_UDMA = ((1LU << ATA_NR_UDMA_MODES) - 1)
442 << ATA_SHIFT_UDMA,
443 };
444
445 enum hsm_task_states {
446 HSM_ST_IDLE, /* no command on going */
447 HSM_ST_FIRST, /* (waiting the device to)
448 write CDB or first data block */
449 HSM_ST, /* (waiting the device to) transfer data */
450 HSM_ST_LAST, /* (waiting the device to) complete command */
451 HSM_ST_ERR, /* error */
452 };
453
454 enum ata_completion_errors {
455 AC_ERR_DEV = (1 << 0), /* device reported error */
456 AC_ERR_HSM = (1 << 1), /* host state machine violation */
457 AC_ERR_TIMEOUT = (1 << 2), /* timeout */
458 AC_ERR_MEDIA = (1 << 3), /* media error */
459 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */
460 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */
461 AC_ERR_SYSTEM = (1 << 6), /* system error */
462 AC_ERR_INVALID = (1 << 7), /* invalid argument */
463 AC_ERR_OTHER = (1 << 8), /* unknown */
464 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */
465 AC_ERR_NCQ = (1 << 10), /* marker for offending NCQ qc */
466 };
467
468 /*
469 * Link power management policy: If you alter this, you also need to
470 * alter libata-scsi.c (for the ascii descriptions)
471 */
472 enum ata_lpm_policy {
473 ATA_LPM_UNKNOWN,
474 ATA_LPM_MAX_POWER,
475 ATA_LPM_MED_POWER,
476 ATA_LPM_MIN_POWER,
477 };
478
479 enum ata_lpm_hints {
480 ATA_LPM_EMPTY = (1 << 0), /* port empty/probing */
481 ATA_LPM_HIPM = (1 << 1), /* may use HIPM */
482 };
483
484 /* forward declarations */
485 struct scsi_device;
486 struct ata_port_operations;
487 struct ata_port;
488 struct ata_link;
489 struct ata_queued_cmd;
490
491 /* typedefs */
492 typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
493 typedef int (*ata_prereset_fn_t)(struct ata_link *link, unsigned long deadline);
494 typedef int (*ata_reset_fn_t)(struct ata_link *link, unsigned int *classes,
495 unsigned long deadline);
496 typedef void (*ata_postreset_fn_t)(struct ata_link *link, unsigned int *classes);
497
498 extern struct device_attribute dev_attr_link_power_management_policy;
499 extern struct device_attribute dev_attr_unload_heads;
500 extern struct device_attribute dev_attr_em_message_type;
501 extern struct device_attribute dev_attr_em_message;
502 extern struct device_attribute dev_attr_sw_activity;
503
504 enum sw_activity {
505 OFF,
506 BLINK_ON,
507 BLINK_OFF,
508 };
509
510 #ifdef CONFIG_ATA_SFF
511 struct ata_ioports {
512 void __iomem *cmd_addr;
513 void __iomem *data_addr;
514 void __iomem *error_addr;
515 void __iomem *feature_addr;
516 void __iomem *nsect_addr;
517 void __iomem *lbal_addr;
518 void __iomem *lbam_addr;
519 void __iomem *lbah_addr;
520 void __iomem *device_addr;
521 void __iomem *status_addr;
522 void __iomem *command_addr;
523 void __iomem *altstatus_addr;
524 void __iomem *ctl_addr;
525 #ifdef CONFIG_ATA_BMDMA
526 void __iomem *bmdma_addr;
527 #endif /* CONFIG_ATA_BMDMA */
528 void __iomem *scr_addr;
529 };
530 #endif /* CONFIG_ATA_SFF */
531
532 struct ata_host {
533 spinlock_t lock;
534 struct device *dev;
535 void __iomem * const *iomap;
536 unsigned int n_ports;
537 void *private_data;
538 struct ata_port_operations *ops;
539 unsigned long flags;
540
541 struct mutex eh_mutex;
542 struct task_struct *eh_owner;
543
544 #ifdef CONFIG_ATA_ACPI
545 acpi_handle acpi_handle;
546 #endif
547 struct ata_port *simplex_claimed; /* channel owning the DMA */
548 struct ata_port *ports[0];
549 };
550
551 struct ata_queued_cmd {
552 struct ata_port *ap;
553 struct ata_device *dev;
554
555 struct scsi_cmnd *scsicmd;
556 void (*scsidone)(struct scsi_cmnd *);
557
558 struct ata_taskfile tf;
559 u8 cdb[ATAPI_CDB_LEN];
560
561 unsigned long flags; /* ATA_QCFLAG_xxx */
562 unsigned int tag;
563 unsigned int n_elem;
564 unsigned int orig_n_elem;
565
566 int dma_dir;
567
568 unsigned int sect_size;
569
570 unsigned int nbytes;
571 unsigned int extrabytes;
572 unsigned int curbytes;
573
574 struct scatterlist sgent;
575
576 struct scatterlist *sg;
577
578 struct scatterlist *cursg;
579 unsigned int cursg_ofs;
580
581 unsigned int err_mask;
582 struct ata_taskfile result_tf;
583 ata_qc_cb_t complete_fn;
584
585 void *private_data;
586 void *lldd_task;
587 };
588
589 struct ata_port_stats {
590 unsigned long unhandled_irq;
591 unsigned long idle_irq;
592 unsigned long rw_reqbuf;
593 };
594
595 struct ata_ering_entry {
596 unsigned int eflags;
597 unsigned int err_mask;
598 u64 timestamp;
599 };
600
601 struct ata_ering {
602 int cursor;
603 struct ata_ering_entry ring[ATA_ERING_SIZE];
604 };
605
606 struct ata_device {
607 struct ata_link *link;
608 unsigned int devno; /* 0 or 1 */
609 unsigned int horkage; /* List of broken features */
610 unsigned long flags; /* ATA_DFLAG_xxx */
611 struct scsi_device *sdev; /* attached SCSI device */
612 void *private_data;
613 #ifdef CONFIG_ATA_ACPI
614 acpi_handle acpi_handle;
615 union acpi_object *gtf_cache;
616 unsigned int gtf_filter;
617 #endif
618 struct device tdev;
619 /* n_sector is CLEAR_BEGIN, read comment above CLEAR_BEGIN */
620 u64 n_sectors; /* size of device, if ATA */
621 u64 n_native_sectors; /* native size, if ATA */
622 unsigned int class; /* ATA_DEV_xxx */
623 unsigned long unpark_deadline;
624
625 u8 pio_mode;
626 u8 dma_mode;
627 u8 xfer_mode;
628 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
629
630 unsigned int multi_count; /* sectors count for
631 READ/WRITE MULTIPLE */
632 unsigned int max_sectors; /* per-device max sectors */
633 unsigned int cdb_len;
634
635 /* per-dev xfer mask */
636 unsigned long pio_mask;
637 unsigned long mwdma_mask;
638 unsigned long udma_mask;
639
640 /* for CHS addressing */
641 u16 cylinders; /* Number of cylinders */
642 u16 heads; /* Number of heads */
643 u16 sectors; /* Number of sectors per track */
644
645 union {
646 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
647 u32 gscr[SATA_PMP_GSCR_DWORDS]; /* PMP GSCR block */
648 };
649
650 /* error history */
651 int spdn_cnt;
652 /* ering is CLEAR_END, read comment above CLEAR_END */
653 struct ata_ering ering;
654 };
655
656 /* Fields between ATA_DEVICE_CLEAR_BEGIN and ATA_DEVICE_CLEAR_END are
657 * cleared to zero on ata_dev_init().
658 */
659 #define ATA_DEVICE_CLEAR_BEGIN offsetof(struct ata_device, n_sectors)
660 #define ATA_DEVICE_CLEAR_END offsetof(struct ata_device, ering)
661
662 struct ata_eh_info {
663 struct ata_device *dev; /* offending device */
664 u32 serror; /* SError from LLDD */
665 unsigned int err_mask; /* port-wide err_mask */
666 unsigned int action; /* ATA_EH_* action mask */
667 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */
668 unsigned int flags; /* ATA_EHI_* flags */
669
670 unsigned int probe_mask;
671
672 char desc[ATA_EH_DESC_LEN];
673 int desc_len;
674 };
675
676 struct ata_eh_context {
677 struct ata_eh_info i;
678 int tries[ATA_MAX_DEVICES];
679 int cmd_timeout_idx[ATA_MAX_DEVICES]
680 [ATA_EH_CMD_TIMEOUT_TABLE_SIZE];
681 unsigned int classes[ATA_MAX_DEVICES];
682 unsigned int did_probe_mask;
683 unsigned int unloaded_mask;
684 unsigned int saved_ncq_enabled;
685 u8 saved_xfer_mode[ATA_MAX_DEVICES];
686 /* timestamp for the last reset attempt or success */
687 unsigned long last_reset;
688 };
689
690 struct ata_acpi_drive
691 {
692 u32 pio;
693 u32 dma;
694 } __packed;
695
696 struct ata_acpi_gtm {
697 struct ata_acpi_drive drive[2];
698 u32 flags;
699 } __packed;
700
701 struct ata_link {
702 struct ata_port *ap;
703 int pmp; /* port multiplier port # */
704
705 struct device tdev;
706 unsigned int active_tag; /* active tag on this link */
707 u32 sactive; /* active NCQ commands */
708
709 unsigned int flags; /* ATA_LFLAG_xxx */
710
711 u32 saved_scontrol; /* SControl on probe */
712 unsigned int hw_sata_spd_limit;
713 unsigned int sata_spd_limit;
714 unsigned int sata_spd; /* current SATA PHY speed */
715 enum ata_lpm_policy lpm_policy;
716
717 /* record runtime error info, protected by host_set lock */
718 struct ata_eh_info eh_info;
719 /* EH context */
720 struct ata_eh_context eh_context;
721
722 struct ata_device device[ATA_MAX_DEVICES];
723 };
724 #define ATA_LINK_CLEAR_BEGIN offsetof(struct ata_link, active_tag)
725 #define ATA_LINK_CLEAR_END offsetof(struct ata_link, device[0])
726
727 struct ata_port {
728 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */
729 struct ata_port_operations *ops;
730 spinlock_t *lock;
731 /* Flags owned by the EH context. Only EH should touch these once the
732 port is active */
733 unsigned long flags; /* ATA_FLAG_xxx */
734 /* Flags that change dynamically, protected by ap->lock */
735 unsigned int pflags; /* ATA_PFLAG_xxx */
736 unsigned int print_id; /* user visible unique port ID */
737 unsigned int port_no; /* 0 based port no. inside the host */
738
739 #ifdef CONFIG_ATA_SFF
740 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
741 u8 ctl; /* cache of ATA control register */
742 u8 last_ctl; /* Cache last written value */
743 struct ata_link* sff_pio_task_link; /* link currently used */
744 struct delayed_work sff_pio_task;
745 #ifdef CONFIG_ATA_BMDMA
746 struct ata_bmdma_prd *bmdma_prd; /* BMDMA SG list */
747 dma_addr_t bmdma_prd_dma; /* and its DMA mapping */
748 #endif /* CONFIG_ATA_BMDMA */
749 #endif /* CONFIG_ATA_SFF */
750
751 unsigned int pio_mask;
752 unsigned int mwdma_mask;
753 unsigned int udma_mask;
754 unsigned int cbl; /* cable type; ATA_CBL_xxx */
755
756 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
757 unsigned long qc_allocated;
758 unsigned int qc_active;
759 int nr_active_links; /* #links with active qcs */
760
761 struct ata_link link; /* host default link */
762 struct ata_link *slave_link; /* see ata_slave_link_init() */
763
764 int nr_pmp_links; /* nr of available PMP links */
765 struct ata_link *pmp_link; /* array of PMP links */
766 struct ata_link *excl_link; /* for PMP qc exclusion */
767
768 struct ata_port_stats stats;
769 struct ata_host *host;
770 struct device *dev;
771 struct device tdev;
772
773 struct mutex scsi_scan_mutex;
774 struct delayed_work hotplug_task;
775 struct work_struct scsi_rescan_task;
776
777 unsigned int hsm_task_state;
778
779 u32 msg_enable;
780 struct list_head eh_done_q;
781 wait_queue_head_t eh_wait_q;
782 int eh_tries;
783 struct completion park_req_pending;
784
785 pm_message_t pm_mesg;
786 int *pm_result;
787 enum ata_lpm_policy target_lpm_policy;
788
789 struct timer_list fastdrain_timer;
790 unsigned long fastdrain_cnt;
791
792 int em_message_type;
793 void *private_data;
794
795 #ifdef CONFIG_ATA_ACPI
796 acpi_handle acpi_handle;
797 struct ata_acpi_gtm __acpi_init_gtm; /* use ata_acpi_init_gtm() */
798 #endif
799 /* owned by EH */
800 u8 sector_buf[ATA_SECT_SIZE] ____cacheline_aligned;
801 };
802
803 /* The following initializer overrides a method to NULL whether one of
804 * its parent has the method defined or not. This is equivalent to
805 * ERR_PTR(-ENOENT). Unfortunately, ERR_PTR doesn't render a constant
806 * expression and thus can't be used as an initializer.
807 */
808 #define ATA_OP_NULL (void *)(unsigned long)(-ENOENT)
809
810 struct ata_port_operations {
811 /*
812 * Command execution
813 */
814 int (*qc_defer)(struct ata_queued_cmd *qc);
815 int (*check_atapi_dma)(struct ata_queued_cmd *qc);
816 void (*qc_prep)(struct ata_queued_cmd *qc);
817 unsigned int (*qc_issue)(struct ata_queued_cmd *qc);
818 bool (*qc_fill_rtf)(struct ata_queued_cmd *qc);
819
820 /*
821 * Configuration and exception handling
822 */
823 int (*cable_detect)(struct ata_port *ap);
824 unsigned long (*mode_filter)(struct ata_device *dev, unsigned long xfer_mask);
825 void (*set_piomode)(struct ata_port *ap, struct ata_device *dev);
826 void (*set_dmamode)(struct ata_port *ap, struct ata_device *dev);
827 int (*set_mode)(struct ata_link *link, struct ata_device **r_failed_dev);
828 unsigned int (*read_id)(struct ata_device *dev, struct ata_taskfile *tf, u16 *id);
829
830 void (*dev_config)(struct ata_device *dev);
831
832 void (*freeze)(struct ata_port *ap);
833 void (*thaw)(struct ata_port *ap);
834 ata_prereset_fn_t prereset;
835 ata_reset_fn_t softreset;
836 ata_reset_fn_t hardreset;
837 ata_postreset_fn_t postreset;
838 ata_prereset_fn_t pmp_prereset;
839 ata_reset_fn_t pmp_softreset;
840 ata_reset_fn_t pmp_hardreset;
841 ata_postreset_fn_t pmp_postreset;
842 void (*error_handler)(struct ata_port *ap);
843 void (*lost_interrupt)(struct ata_port *ap);
844 void (*post_internal_cmd)(struct ata_queued_cmd *qc);
845
846 /*
847 * Optional features
848 */
849 int (*scr_read)(struct ata_link *link, unsigned int sc_reg, u32 *val);
850 int (*scr_write)(struct ata_link *link, unsigned int sc_reg, u32 val);
851 void (*pmp_attach)(struct ata_port *ap);
852 void (*pmp_detach)(struct ata_port *ap);
853 int (*set_lpm)(struct ata_link *link, enum ata_lpm_policy policy,
854 unsigned hints);
855
856 /*
857 * Start, stop, suspend and resume
858 */
859 int (*port_suspend)(struct ata_port *ap, pm_message_t mesg);
860 int (*port_resume)(struct ata_port *ap);
861 int (*port_start)(struct ata_port *ap);
862 void (*port_stop)(struct ata_port *ap);
863 void (*host_stop)(struct ata_host *host);
864
865 #ifdef CONFIG_ATA_SFF
866 /*
867 * SFF / taskfile oriented ops
868 */
869 void (*sff_dev_select)(struct ata_port *ap, unsigned int device);
870 void (*sff_set_devctl)(struct ata_port *ap, u8 ctl);
871 u8 (*sff_check_status)(struct ata_port *ap);
872 u8 (*sff_check_altstatus)(struct ata_port *ap);
873 void (*sff_tf_load)(struct ata_port *ap, const struct ata_taskfile *tf);
874 void (*sff_tf_read)(struct ata_port *ap, struct ata_taskfile *tf);
875 void (*sff_exec_command)(struct ata_port *ap,
876 const struct ata_taskfile *tf);
877 unsigned int (*sff_data_xfer)(struct ata_device *dev,
878 unsigned char *buf, unsigned int buflen, int rw);
879 void (*sff_irq_on)(struct ata_port *);
880 bool (*sff_irq_check)(struct ata_port *);
881 void (*sff_irq_clear)(struct ata_port *);
882 void (*sff_drain_fifo)(struct ata_queued_cmd *qc);
883
884 #ifdef CONFIG_ATA_BMDMA
885 void (*bmdma_setup)(struct ata_queued_cmd *qc);
886 void (*bmdma_start)(struct ata_queued_cmd *qc);
887 void (*bmdma_stop)(struct ata_queued_cmd *qc);
888 u8 (*bmdma_status)(struct ata_port *ap);
889 #endif /* CONFIG_ATA_BMDMA */
890 #endif /* CONFIG_ATA_SFF */
891
892 ssize_t (*em_show)(struct ata_port *ap, char *buf);
893 ssize_t (*em_store)(struct ata_port *ap, const char *message,
894 size_t size);
895 ssize_t (*sw_activity_show)(struct ata_device *dev, char *buf);
896 ssize_t (*sw_activity_store)(struct ata_device *dev,
897 enum sw_activity val);
898 /*
899 * Obsolete
900 */
901 void (*phy_reset)(struct ata_port *ap);
902 void (*eng_timeout)(struct ata_port *ap);
903
904 /*
905 * ->inherits must be the last field and all the preceding
906 * fields must be pointers.
907 */
908 const struct ata_port_operations *inherits;
909 };
910
911 struct ata_port_info {
912 unsigned long flags;
913 unsigned long link_flags;
914 unsigned long pio_mask;
915 unsigned long mwdma_mask;
916 unsigned long udma_mask;
917 struct ata_port_operations *port_ops;
918 void *private_data;
919 };
920
921 struct ata_timing {
922 unsigned short mode; /* ATA mode */
923 unsigned short setup; /* t1 */
924 unsigned short act8b; /* t2 for 8-bit I/O */
925 unsigned short rec8b; /* t2i for 8-bit I/O */
926 unsigned short cyc8b; /* t0 for 8-bit I/O */
927 unsigned short active; /* t2 or tD */
928 unsigned short recover; /* t2i or tK */
929 unsigned short dmack_hold; /* tj */
930 unsigned short cycle; /* t0 */
931 unsigned short udma; /* t2CYCTYP/2 */
932 };
933
934 /*
935 * Core layer - drivers/ata/libata-core.c
936 */
937 extern const unsigned long sata_deb_timing_normal[];
938 extern const unsigned long sata_deb_timing_hotplug[];
939 extern const unsigned long sata_deb_timing_long[];
940
941 extern struct ata_port_operations ata_dummy_port_ops;
942 extern const struct ata_port_info ata_dummy_port_info;
943
944 static inline const unsigned long *
945 sata_ehc_deb_timing(struct ata_eh_context *ehc)
946 {
947 if (ehc->i.flags & ATA_EHI_HOTPLUGGED)
948 return sata_deb_timing_hotplug;
949 else
950 return sata_deb_timing_normal;
951 }
952
953 static inline int ata_port_is_dummy(struct ata_port *ap)
954 {
955 return ap->ops == &ata_dummy_port_ops;
956 }
957
958 extern int sata_set_spd(struct ata_link *link);
959 extern int ata_std_prereset(struct ata_link *link, unsigned long deadline);
960 extern int ata_wait_after_reset(struct ata_link *link, unsigned long deadline,
961 int (*check_ready)(struct ata_link *link));
962 extern int sata_link_debounce(struct ata_link *link,
963 const unsigned long *params, unsigned long deadline);
964 extern int sata_link_resume(struct ata_link *link, const unsigned long *params,
965 unsigned long deadline);
966 extern int sata_link_scr_lpm(struct ata_link *link, enum ata_lpm_policy policy,
967 bool spm_wakeup);
968 extern int sata_link_hardreset(struct ata_link *link,
969 const unsigned long *timing, unsigned long deadline,
970 bool *online, int (*check_ready)(struct ata_link *));
971 extern int sata_std_hardreset(struct ata_link *link, unsigned int *class,
972 unsigned long deadline);
973 extern void ata_std_postreset(struct ata_link *link, unsigned int *classes);
974
975 extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports);
976 extern struct ata_host *ata_host_alloc_pinfo(struct device *dev,
977 const struct ata_port_info * const * ppi, int n_ports);
978 extern int ata_slave_link_init(struct ata_port *ap);
979 extern int ata_host_start(struct ata_host *host);
980 extern int ata_host_register(struct ata_host *host,
981 struct scsi_host_template *sht);
982 extern int ata_host_activate(struct ata_host *host, int irq,
983 irq_handler_t irq_handler, unsigned long irq_flags,
984 struct scsi_host_template *sht);
985 extern void ata_host_detach(struct ata_host *host);
986 extern void ata_host_init(struct ata_host *, struct device *,
987 unsigned long, struct ata_port_operations *);
988 extern int ata_scsi_detect(struct scsi_host_template *sht);
989 extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
990 extern int ata_scsi_queuecmd(struct Scsi_Host *h, struct scsi_cmnd *cmd);
991 extern int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *dev,
992 int cmd, void __user *arg);
993 extern void ata_sas_port_destroy(struct ata_port *);
994 extern struct ata_port *ata_sas_port_alloc(struct ata_host *,
995 struct ata_port_info *, struct Scsi_Host *);
996 extern int ata_sas_port_init(struct ata_port *);
997 extern int ata_sas_port_start(struct ata_port *ap);
998 extern void ata_sas_port_stop(struct ata_port *ap);
999 extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *);
1000 extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, 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 extern int ata_std_bios_param(struct scsi_device *sdev,
1045 struct block_device *bdev,
1046 sector_t capacity, int geom[]);
1047 extern void ata_scsi_unlock_native_capacity(struct scsi_device *sdev);
1048 extern int ata_scsi_slave_config(struct scsi_device *sdev);
1049 extern void ata_scsi_slave_destroy(struct scsi_device *sdev);
1050 extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
1051 int queue_depth, int reason);
1052 extern struct ata_device *ata_dev_pair(struct ata_device *adev);
1053 extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev);
1054
1055 extern int ata_cable_40wire(struct ata_port *ap);
1056 extern int ata_cable_80wire(struct ata_port *ap);
1057 extern int ata_cable_sata(struct ata_port *ap);
1058 extern int ata_cable_ignore(struct ata_port *ap);
1059 extern int ata_cable_unknown(struct ata_port *ap);
1060
1061 /* Timing helpers */
1062 extern unsigned int ata_pio_need_iordy(const struct ata_device *);
1063 extern const struct ata_timing *ata_timing_find_mode(u8 xfer_mode);
1064 extern int ata_timing_compute(struct ata_device *, unsigned short,
1065 struct ata_timing *, int, int);
1066 extern void ata_timing_merge(const struct ata_timing *,
1067 const struct ata_timing *, struct ata_timing *,
1068 unsigned int);
1069 extern u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle);
1070
1071 /* PCI */
1072 #ifdef CONFIG_PCI
1073 struct pci_dev;
1074
1075 struct pci_bits {
1076 unsigned int reg; /* PCI config register to read */
1077 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
1078 unsigned long mask;
1079 unsigned long val;
1080 };
1081
1082 extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
1083 extern void ata_pci_remove_one(struct pci_dev *pdev);
1084
1085 #ifdef CONFIG_PM
1086 extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg);
1087 extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev);
1088 extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
1089 extern int ata_pci_device_resume(struct pci_dev *pdev);
1090 #endif /* CONFIG_PM */
1091 #endif /* CONFIG_PCI */
1092
1093 /*
1094 * ACPI - drivers/ata/libata-acpi.c
1095 */
1096 #ifdef CONFIG_ATA_ACPI
1097 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
1098 {
1099 if (ap->pflags & ATA_PFLAG_INIT_GTM_VALID)
1100 return &ap->__acpi_init_gtm;
1101 return NULL;
1102 }
1103 int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm);
1104 int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *stm);
1105 unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev,
1106 const struct ata_acpi_gtm *gtm);
1107 int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm);
1108 #else
1109 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
1110 {
1111 return NULL;
1112 }
1113
1114 static inline int ata_acpi_stm(const struct ata_port *ap,
1115 struct ata_acpi_gtm *stm)
1116 {
1117 return -ENOSYS;
1118 }
1119
1120 static inline int ata_acpi_gtm(const struct ata_port *ap,
1121 struct ata_acpi_gtm *stm)
1122 {
1123 return -ENOSYS;
1124 }
1125
1126 static inline unsigned int ata_acpi_gtm_xfermask(struct ata_device *dev,
1127 const struct ata_acpi_gtm *gtm)
1128 {
1129 return 0;
1130 }
1131
1132 static inline int ata_acpi_cbl_80wire(struct ata_port *ap,
1133 const struct ata_acpi_gtm *gtm)
1134 {
1135 return 0;
1136 }
1137 #endif
1138
1139 /*
1140 * EH - drivers/ata/libata-eh.c
1141 */
1142 extern void ata_port_schedule_eh(struct ata_port *ap);
1143 extern int ata_link_abort(struct ata_link *link);
1144 extern int ata_port_abort(struct ata_port *ap);
1145 extern int ata_port_freeze(struct ata_port *ap);
1146 extern int sata_async_notification(struct ata_port *ap);
1147
1148 extern void ata_eh_freeze_port(struct ata_port *ap);
1149 extern void ata_eh_thaw_port(struct ata_port *ap);
1150
1151 extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
1152 extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
1153 extern void ata_eh_analyze_ncq_error(struct ata_link *link);
1154
1155 extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
1156 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
1157 ata_postreset_fn_t postreset);
1158 extern void ata_std_error_handler(struct ata_port *ap);
1159
1160 /*
1161 * Base operations to inherit from and initializers for sht
1162 *
1163 * Operations
1164 *
1165 * base : Common to all libata drivers.
1166 * sata : SATA controllers w/ native interface.
1167 * pmp : SATA controllers w/ PMP support.
1168 * sff : SFF ATA controllers w/o BMDMA support.
1169 * bmdma : SFF ATA controllers w/ BMDMA support.
1170 *
1171 * sht initializers
1172 *
1173 * BASE : Common to all libata drivers. The user must set
1174 * sg_tablesize and dma_boundary.
1175 * PIO : SFF ATA controllers w/ only PIO support.
1176 * BMDMA : SFF ATA controllers w/ BMDMA support. sg_tablesize and
1177 * dma_boundary are set to BMDMA limits.
1178 * NCQ : SATA controllers supporting NCQ. The user must set
1179 * sg_tablesize, dma_boundary and can_queue.
1180 */
1181 extern const struct ata_port_operations ata_base_port_ops;
1182 extern const struct ata_port_operations sata_port_ops;
1183 extern struct device_attribute *ata_common_sdev_attrs[];
1184
1185 #define ATA_BASE_SHT(drv_name) \
1186 .module = THIS_MODULE, \
1187 .name = drv_name, \
1188 .ioctl = ata_scsi_ioctl, \
1189 .queuecommand = ata_scsi_queuecmd, \
1190 .can_queue = ATA_DEF_QUEUE, \
1191 .this_id = ATA_SHT_THIS_ID, \
1192 .cmd_per_lun = ATA_SHT_CMD_PER_LUN, \
1193 .emulated = ATA_SHT_EMULATED, \
1194 .use_clustering = ATA_SHT_USE_CLUSTERING, \
1195 .proc_name = drv_name, \
1196 .slave_configure = ata_scsi_slave_config, \
1197 .slave_destroy = ata_scsi_slave_destroy, \
1198 .bios_param = ata_std_bios_param, \
1199 .unlock_native_capacity = ata_scsi_unlock_native_capacity, \
1200 .sdev_attrs = ata_common_sdev_attrs
1201
1202 #define ATA_NCQ_SHT(drv_name) \
1203 ATA_BASE_SHT(drv_name), \
1204 .change_queue_depth = ata_scsi_change_queue_depth
1205
1206 /*
1207 * PMP helpers
1208 */
1209 #ifdef CONFIG_SATA_PMP
1210 static inline bool sata_pmp_supported(struct ata_port *ap)
1211 {
1212 return ap->flags & ATA_FLAG_PMP;
1213 }
1214
1215 static inline bool sata_pmp_attached(struct ata_port *ap)
1216 {
1217 return ap->nr_pmp_links != 0;
1218 }
1219
1220 static inline int ata_is_host_link(const struct ata_link *link)
1221 {
1222 return link == &link->ap->link || link == link->ap->slave_link;
1223 }
1224 #else /* CONFIG_SATA_PMP */
1225 static inline bool sata_pmp_supported(struct ata_port *ap)
1226 {
1227 return false;
1228 }
1229
1230 static inline bool sata_pmp_attached(struct ata_port *ap)
1231 {
1232 return false;
1233 }
1234
1235 static inline int ata_is_host_link(const struct ata_link *link)
1236 {
1237 return 1;
1238 }
1239 #endif /* CONFIG_SATA_PMP */
1240
1241 static inline int sata_srst_pmp(struct ata_link *link)
1242 {
1243 if (sata_pmp_supported(link->ap) && ata_is_host_link(link))
1244 return SATA_PMP_CTRL_PORT;
1245 return link->pmp;
1246 }
1247
1248 /*
1249 * printk helpers
1250 */
1251 #define ata_port_printk(ap, lv, fmt, args...) \
1252 printk("%sata%u: "fmt, lv, (ap)->print_id , ##args)
1253
1254 #define ata_link_printk(link, lv, fmt, args...) do { \
1255 if (sata_pmp_attached((link)->ap) || (link)->ap->slave_link) \
1256 printk("%sata%u.%02u: "fmt, lv, (link)->ap->print_id, \
1257 (link)->pmp , ##args); \
1258 else \
1259 printk("%sata%u: "fmt, lv, (link)->ap->print_id , ##args); \
1260 } while(0)
1261
1262 #define ata_dev_printk(dev, lv, fmt, args...) \
1263 printk("%sata%u.%02u: "fmt, lv, (dev)->link->ap->print_id, \
1264 (dev)->link->pmp + (dev)->devno , ##args)
1265
1266 /*
1267 * ata_eh_info helpers
1268 */
1269 extern void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...)
1270 __attribute__ ((format (printf, 2, 3)));
1271 extern void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...)
1272 __attribute__ ((format (printf, 2, 3)));
1273 extern void ata_ehi_clear_desc(struct ata_eh_info *ehi);
1274
1275 static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
1276 {
1277 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
1278 ehi->flags |= ATA_EHI_HOTPLUGGED;
1279 ehi->action |= ATA_EH_RESET | ATA_EH_ENABLE_LINK;
1280 ehi->err_mask |= AC_ERR_ATA_BUS;
1281 }
1282
1283 /*
1284 * port description helpers
1285 */
1286 extern void ata_port_desc(struct ata_port *ap, const char *fmt, ...)
1287 __attribute__ ((format (printf, 2, 3)));
1288 #ifdef CONFIG_PCI
1289 extern void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset,
1290 const char *name);
1291 #endif
1292
1293 static inline unsigned int ata_tag_valid(unsigned int tag)
1294 {
1295 return (tag < ATA_MAX_QUEUE) ? 1 : 0;
1296 }
1297
1298 static inline unsigned int ata_tag_internal(unsigned int tag)
1299 {
1300 return tag == ATA_TAG_INTERNAL;
1301 }
1302
1303 /*
1304 * device helpers
1305 */
1306 static inline unsigned int ata_class_enabled(unsigned int class)
1307 {
1308 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI ||
1309 class == ATA_DEV_PMP || class == ATA_DEV_SEMB;
1310 }
1311
1312 static inline unsigned int ata_class_disabled(unsigned int class)
1313 {
1314 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP ||
1315 class == ATA_DEV_PMP_UNSUP || class == ATA_DEV_SEMB_UNSUP;
1316 }
1317
1318 static inline unsigned int ata_class_absent(unsigned int class)
1319 {
1320 return !ata_class_enabled(class) && !ata_class_disabled(class);
1321 }
1322
1323 static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
1324 {
1325 return ata_class_enabled(dev->class);
1326 }
1327
1328 static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
1329 {
1330 return ata_class_disabled(dev->class);
1331 }
1332
1333 static inline unsigned int ata_dev_absent(const struct ata_device *dev)
1334 {
1335 return ata_class_absent(dev->class);
1336 }
1337
1338 /*
1339 * link helpers
1340 */
1341 static inline int ata_link_max_devices(const struct ata_link *link)
1342 {
1343 if (ata_is_host_link(link) && link->ap->flags & ATA_FLAG_SLAVE_POSS)
1344 return 2;
1345 return 1;
1346 }
1347
1348 static inline int ata_link_active(struct ata_link *link)
1349 {
1350 return ata_tag_valid(link->active_tag) || link->sactive;
1351 }
1352
1353 /*
1354 * Iterators
1355 *
1356 * ATA_LITER_* constants are used to select link iteration mode and
1357 * ATA_DITER_* device iteration mode.
1358 *
1359 * For a custom iteration directly using ata_{link|dev}_next(), if
1360 * @link or @dev, respectively, is NULL, the first element is
1361 * returned. @dev and @link can be any valid device or link and the
1362 * next element according to the iteration mode will be returned.
1363 * After the last element, NULL is returned.
1364 */
1365 enum ata_link_iter_mode {
1366 ATA_LITER_EDGE, /* if present, PMP links only; otherwise,
1367 * host link. no slave link */
1368 ATA_LITER_HOST_FIRST, /* host link followed by PMP or slave links */
1369 ATA_LITER_PMP_FIRST, /* PMP links followed by host link,
1370 * slave link still comes after host link */
1371 };
1372
1373 enum ata_dev_iter_mode {
1374 ATA_DITER_ENABLED,
1375 ATA_DITER_ENABLED_REVERSE,
1376 ATA_DITER_ALL,
1377 ATA_DITER_ALL_REVERSE,
1378 };
1379
1380 extern struct ata_link *ata_link_next(struct ata_link *link,
1381 struct ata_port *ap,
1382 enum ata_link_iter_mode mode);
1383
1384 extern struct ata_device *ata_dev_next(struct ata_device *dev,
1385 struct ata_link *link,
1386 enum ata_dev_iter_mode mode);
1387
1388 /*
1389 * Shortcut notation for iterations
1390 *
1391 * ata_for_each_link() iterates over each link of @ap according to
1392 * @mode. @link points to the current link in the loop. @link is
1393 * NULL after loop termination. ata_for_each_dev() works the same way
1394 * except that it iterates over each device of @link.
1395 *
1396 * Note that the mode prefixes ATA_{L|D}ITER_ shouldn't need to be
1397 * specified when using the following shorthand notations. Only the
1398 * mode itself (EDGE, HOST_FIRST, ENABLED, etc...) should be
1399 * specified. This not only increases brevity but also makes it
1400 * impossible to use ATA_LITER_* for device iteration or vice-versa.
1401 */
1402 #define ata_for_each_link(link, ap, mode) \
1403 for ((link) = ata_link_next(NULL, (ap), ATA_LITER_##mode); (link); \
1404 (link) = ata_link_next((link), (ap), ATA_LITER_##mode))
1405
1406 #define ata_for_each_dev(dev, link, mode) \
1407 for ((dev) = ata_dev_next(NULL, (link), ATA_DITER_##mode); (dev); \
1408 (dev) = ata_dev_next((dev), (link), ATA_DITER_##mode))
1409
1410 /**
1411 * ata_ncq_enabled - Test whether NCQ is enabled
1412 * @dev: ATA device to test for
1413 *
1414 * LOCKING:
1415 * spin_lock_irqsave(host lock)
1416 *
1417 * RETURNS:
1418 * 1 if NCQ is enabled for @dev, 0 otherwise.
1419 */
1420 static inline int ata_ncq_enabled(struct ata_device *dev)
1421 {
1422 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF |
1423 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ;
1424 }
1425
1426 static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
1427 {
1428 qc->tf.ctl |= ATA_NIEN;
1429 }
1430
1431 static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap,
1432 unsigned int tag)
1433 {
1434 if (likely(ata_tag_valid(tag)))
1435 return &ap->qcmd[tag];
1436 return NULL;
1437 }
1438
1439 static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap,
1440 unsigned int tag)
1441 {
1442 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
1443
1444 if (unlikely(!qc) || !ap->ops->error_handler)
1445 return qc;
1446
1447 if ((qc->flags & (ATA_QCFLAG_ACTIVE |
1448 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE)
1449 return qc;
1450
1451 return NULL;
1452 }
1453
1454 static inline unsigned int ata_qc_raw_nbytes(struct ata_queued_cmd *qc)
1455 {
1456 return qc->nbytes - min(qc->extrabytes, qc->nbytes);
1457 }
1458
1459 static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
1460 {
1461 memset(tf, 0, sizeof(*tf));
1462
1463 #ifdef CONFIG_ATA_SFF
1464 tf->ctl = dev->link->ap->ctl;
1465 #else
1466 tf->ctl = ATA_DEVCTL_OBS;
1467 #endif
1468 if (dev->devno == 0)
1469 tf->device = ATA_DEVICE_OBS;
1470 else
1471 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
1472 }
1473
1474 static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
1475 {
1476 qc->dma_dir = DMA_NONE;
1477 qc->sg = NULL;
1478 qc->flags = 0;
1479 qc->cursg = NULL;
1480 qc->cursg_ofs = 0;
1481 qc->nbytes = qc->extrabytes = qc->curbytes = 0;
1482 qc->n_elem = 0;
1483 qc->err_mask = 0;
1484 qc->sect_size = ATA_SECT_SIZE;
1485
1486 ata_tf_init(qc->dev, &qc->tf);
1487
1488 /* init result_tf such that it indicates normal completion */
1489 qc->result_tf.command = ATA_DRDY;
1490 qc->result_tf.feature = 0;
1491 }
1492
1493 static inline int ata_try_flush_cache(const struct ata_device *dev)
1494 {
1495 return ata_id_wcache_enabled(dev->id) ||
1496 ata_id_has_flush(dev->id) ||
1497 ata_id_has_flush_ext(dev->id);
1498 }
1499
1500 static inline unsigned int ac_err_mask(u8 status)
1501 {
1502 if (status & (ATA_BUSY | ATA_DRQ))
1503 return AC_ERR_HSM;
1504 if (status & (ATA_ERR | ATA_DF))
1505 return AC_ERR_DEV;
1506 return 0;
1507 }
1508
1509 static inline unsigned int __ac_err_mask(u8 status)
1510 {
1511 unsigned int mask = ac_err_mask(status);
1512 if (mask == 0)
1513 return AC_ERR_OTHER;
1514 return mask;
1515 }
1516
1517 static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
1518 {
1519 return *(struct ata_port **)&host->hostdata[0];
1520 }
1521
1522 static inline int ata_check_ready(u8 status)
1523 {
1524 if (!(status & ATA_BUSY))
1525 return 1;
1526
1527 /* 0xff indicates either no device or device not ready */
1528 if (status == 0xff)
1529 return -ENODEV;
1530
1531 return 0;
1532 }
1533
1534 static inline unsigned long ata_deadline(unsigned long from_jiffies,
1535 unsigned long timeout_msecs)
1536 {
1537 return from_jiffies + msecs_to_jiffies(timeout_msecs);
1538 }
1539
1540 /* Don't open code these in drivers as there are traps. Firstly the range may
1541 change in future hardware and specs, secondly 0xFF means 'no DMA' but is
1542 > UDMA_0. Dyma ddreigiau */
1543
1544 static inline int ata_using_mwdma(struct ata_device *adev)
1545 {
1546 if (adev->dma_mode >= XFER_MW_DMA_0 && adev->dma_mode <= XFER_MW_DMA_4)
1547 return 1;
1548 return 0;
1549 }
1550
1551 static inline int ata_using_udma(struct ata_device *adev)
1552 {
1553 if (adev->dma_mode >= XFER_UDMA_0 && adev->dma_mode <= XFER_UDMA_7)
1554 return 1;
1555 return 0;
1556 }
1557
1558 static inline int ata_dma_enabled(struct ata_device *adev)
1559 {
1560 return (adev->dma_mode == 0xFF ? 0 : 1);
1561 }
1562
1563 /**************************************************************************
1564 * PMP - drivers/ata/libata-pmp.c
1565 */
1566 #ifdef CONFIG_SATA_PMP
1567
1568 extern const struct ata_port_operations sata_pmp_port_ops;
1569
1570 extern int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc);
1571 extern void sata_pmp_error_handler(struct ata_port *ap);
1572
1573 #else /* CONFIG_SATA_PMP */
1574
1575 #define sata_pmp_port_ops sata_port_ops
1576 #define sata_pmp_qc_defer_cmd_switch ata_std_qc_defer
1577 #define sata_pmp_error_handler ata_std_error_handler
1578
1579 #endif /* CONFIG_SATA_PMP */
1580
1581
1582 /**************************************************************************
1583 * SFF - drivers/ata/libata-sff.c
1584 */
1585 #ifdef CONFIG_ATA_SFF
1586
1587 extern const struct ata_port_operations ata_sff_port_ops;
1588 extern const struct ata_port_operations ata_bmdma32_port_ops;
1589
1590 /* PIO only, sg_tablesize and dma_boundary limits can be removed */
1591 #define ATA_PIO_SHT(drv_name) \
1592 ATA_BASE_SHT(drv_name), \
1593 .sg_tablesize = LIBATA_MAX_PRD, \
1594 .dma_boundary = ATA_DMA_BOUNDARY
1595
1596 extern void ata_sff_dev_select(struct ata_port *ap, unsigned int device);
1597 extern u8 ata_sff_check_status(struct ata_port *ap);
1598 extern void ata_sff_pause(struct ata_port *ap);
1599 extern void ata_sff_dma_pause(struct ata_port *ap);
1600 extern int ata_sff_busy_sleep(struct ata_port *ap,
1601 unsigned long timeout_pat, unsigned long timeout);
1602 extern int ata_sff_wait_ready(struct ata_link *link, unsigned long deadline);
1603 extern void ata_sff_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
1604 extern void ata_sff_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
1605 extern void ata_sff_exec_command(struct ata_port *ap,
1606 const struct ata_taskfile *tf);
1607 extern unsigned int ata_sff_data_xfer(struct ata_device *dev,
1608 unsigned char *buf, unsigned int buflen, int rw);
1609 extern unsigned int ata_sff_data_xfer32(struct ata_device *dev,
1610 unsigned char *buf, unsigned int buflen, int rw);
1611 extern unsigned int ata_sff_data_xfer_noirq(struct ata_device *dev,
1612 unsigned char *buf, unsigned int buflen, int rw);
1613 extern void ata_sff_irq_on(struct ata_port *ap);
1614 extern void ata_sff_irq_clear(struct ata_port *ap);
1615 extern int ata_sff_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
1616 u8 status, int in_wq);
1617 extern void ata_sff_queue_pio_task(struct ata_link *link, unsigned long delay);
1618 extern unsigned int ata_sff_qc_issue(struct ata_queued_cmd *qc);
1619 extern bool ata_sff_qc_fill_rtf(struct ata_queued_cmd *qc);
1620 extern unsigned int ata_sff_port_intr(struct ata_port *ap,
1621 struct ata_queued_cmd *qc);
1622 extern irqreturn_t ata_sff_interrupt(int irq, void *dev_instance);
1623 extern void ata_sff_lost_interrupt(struct ata_port *ap);
1624 extern void ata_sff_freeze(struct ata_port *ap);
1625 extern void ata_sff_thaw(struct ata_port *ap);
1626 extern int ata_sff_prereset(struct ata_link *link, unsigned long deadline);
1627 extern unsigned int ata_sff_dev_classify(struct ata_device *dev, int present,
1628 u8 *r_err);
1629 extern int ata_sff_wait_after_reset(struct ata_link *link, unsigned int devmask,
1630 unsigned long deadline);
1631 extern int ata_sff_softreset(struct ata_link *link, unsigned int *classes,
1632 unsigned long deadline);
1633 extern int sata_sff_hardreset(struct ata_link *link, unsigned int *class,
1634 unsigned long deadline);
1635 extern void ata_sff_postreset(struct ata_link *link, unsigned int *classes);
1636 extern void ata_sff_drain_fifo(struct ata_queued_cmd *qc);
1637 extern void ata_sff_error_handler(struct ata_port *ap);
1638 extern void ata_sff_std_ports(struct ata_ioports *ioaddr);
1639 #ifdef CONFIG_PCI
1640 extern int ata_pci_sff_init_host(struct ata_host *host);
1641 extern int ata_pci_sff_prepare_host(struct pci_dev *pdev,
1642 const struct ata_port_info * const * ppi,
1643 struct ata_host **r_host);
1644 extern int ata_pci_sff_activate_host(struct ata_host *host,
1645 irq_handler_t irq_handler,
1646 struct scsi_host_template *sht);
1647 extern int ata_pci_sff_init_one(struct pci_dev *pdev,
1648 const struct ata_port_info * const * ppi,
1649 struct scsi_host_template *sht, void *host_priv, int hflags);
1650 #endif /* CONFIG_PCI */
1651
1652 #ifdef CONFIG_ATA_BMDMA
1653
1654 extern const struct ata_port_operations ata_bmdma_port_ops;
1655
1656 #define ATA_BMDMA_SHT(drv_name) \
1657 ATA_BASE_SHT(drv_name), \
1658 .sg_tablesize = LIBATA_MAX_PRD, \
1659 .dma_boundary = ATA_DMA_BOUNDARY
1660
1661 extern void ata_bmdma_qc_prep(struct ata_queued_cmd *qc);
1662 extern unsigned int ata_bmdma_qc_issue(struct ata_queued_cmd *qc);
1663 extern void ata_bmdma_dumb_qc_prep(struct ata_queued_cmd *qc);
1664 extern unsigned int ata_bmdma_port_intr(struct ata_port *ap,
1665 struct ata_queued_cmd *qc);
1666 extern irqreturn_t ata_bmdma_interrupt(int irq, void *dev_instance);
1667 extern void ata_bmdma_error_handler(struct ata_port *ap);
1668 extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc);
1669 extern void ata_bmdma_irq_clear(struct ata_port *ap);
1670 extern void ata_bmdma_setup(struct ata_queued_cmd *qc);
1671 extern void ata_bmdma_start(struct ata_queued_cmd *qc);
1672 extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
1673 extern u8 ata_bmdma_status(struct ata_port *ap);
1674 extern int ata_bmdma_port_start(struct ata_port *ap);
1675 extern int ata_bmdma_port_start32(struct ata_port *ap);
1676
1677 #ifdef CONFIG_PCI
1678 extern int ata_pci_bmdma_clear_simplex(struct pci_dev *pdev);
1679 extern void ata_pci_bmdma_init(struct ata_host *host);
1680 extern int ata_pci_bmdma_prepare_host(struct pci_dev *pdev,
1681 const struct ata_port_info * const * ppi,
1682 struct ata_host **r_host);
1683 extern int ata_pci_bmdma_init_one(struct pci_dev *pdev,
1684 const struct ata_port_info * const * ppi,
1685 struct scsi_host_template *sht,
1686 void *host_priv, int hflags);
1687 #endif /* CONFIG_PCI */
1688 #endif /* CONFIG_ATA_BMDMA */
1689
1690 /**
1691 * ata_sff_busy_wait - Wait for a port status register
1692 * @ap: Port to wait for.
1693 * @bits: bits that must be clear
1694 * @max: number of 10uS waits to perform
1695 *
1696 * Waits up to max*10 microseconds for the selected bits in the port's
1697 * status register to be cleared.
1698 * Returns final value of status register.
1699 *
1700 * LOCKING:
1701 * Inherited from caller.
1702 */
1703 static inline u8 ata_sff_busy_wait(struct ata_port *ap, unsigned int bits,
1704 unsigned int max)
1705 {
1706 u8 status;
1707
1708 do {
1709 udelay(10);
1710 status = ap->ops->sff_check_status(ap);
1711 max--;
1712 } while (status != 0xff && (status & bits) && (max > 0));
1713
1714 return status;
1715 }
1716
1717 /**
1718 * ata_wait_idle - Wait for a port to be idle.
1719 * @ap: Port to wait for.
1720 *
1721 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
1722 * Returns final value of status register.
1723 *
1724 * LOCKING:
1725 * Inherited from caller.
1726 */
1727 static inline u8 ata_wait_idle(struct ata_port *ap)
1728 {
1729 u8 status = ata_sff_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
1730
1731 #ifdef ATA_DEBUG
1732 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ)))
1733 ata_port_printk(ap, KERN_DEBUG, "abnormal Status 0x%X\n",
1734 status);
1735 #endif
1736
1737 return status;
1738 }
1739 #endif /* CONFIG_ATA_SFF */
1740
1741 #endif /* __LINUX_LIBATA_H__ */
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree