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