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nlm: Ensure callback code also checks that the files match
[GitHub/mt8127/android_kernel_alcatel_ttab.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 #define ata_print_version_once(dev, version) \
78 ({ \
79 static bool __print_once; \
80 \
81 if (!__print_once) { \
82 __print_once = true; \
83 ata_print_version(dev, version); \
84 } \
85 })
86
87 /* NEW: debug levels */
88 #define HAVE_LIBATA_MSG 1
89
90 enum {
91 ATA_MSG_DRV = 0x0001,
92 ATA_MSG_INFO = 0x0002,
93 ATA_MSG_PROBE = 0x0004,
94 ATA_MSG_WARN = 0x0008,
95 ATA_MSG_MALLOC = 0x0010,
96 ATA_MSG_CTL = 0x0020,
97 ATA_MSG_INTR = 0x0040,
98 ATA_MSG_ERR = 0x0080,
99 };
100
101 #define ata_msg_drv(p) ((p)->msg_enable & ATA_MSG_DRV)
102 #define ata_msg_info(p) ((p)->msg_enable & ATA_MSG_INFO)
103 #define ata_msg_probe(p) ((p)->msg_enable & ATA_MSG_PROBE)
104 #define ata_msg_warn(p) ((p)->msg_enable & ATA_MSG_WARN)
105 #define ata_msg_malloc(p) ((p)->msg_enable & ATA_MSG_MALLOC)
106 #define ata_msg_ctl(p) ((p)->msg_enable & ATA_MSG_CTL)
107 #define ata_msg_intr(p) ((p)->msg_enable & ATA_MSG_INTR)
108 #define ata_msg_err(p) ((p)->msg_enable & ATA_MSG_ERR)
109
110 static inline u32 ata_msg_init(int dval, int default_msg_enable_bits)
111 {
112 if (dval < 0 || dval >= (sizeof(u32) * 8))
113 return default_msg_enable_bits; /* should be 0x1 - only driver info msgs */
114 if (!dval)
115 return 0;
116 return (1 << dval) - 1;
117 }
118
119 /* defines only for the constants which don't work well as enums */
120 #define ATA_TAG_POISON 0xfafbfcfdU
121
122 enum {
123 /* various global constants */
124 LIBATA_MAX_PRD = ATA_MAX_PRD / 2,
125 LIBATA_DUMB_MAX_PRD = ATA_MAX_PRD / 4, /* Worst case */
126 ATA_DEF_QUEUE = 1,
127 /* tag ATA_MAX_QUEUE - 1 is reserved for internal commands */
128 ATA_MAX_QUEUE = 32,
129 ATA_TAG_INTERNAL = ATA_MAX_QUEUE - 1,
130 ATA_SHORT_PAUSE = 16,
131
132 ATAPI_MAX_DRAIN = 16 << 10,
133
134 ATA_ALL_DEVICES = (1 << ATA_MAX_DEVICES) - 1,
135
136 ATA_SHT_EMULATED = 1,
137 ATA_SHT_CMD_PER_LUN = 1,
138 ATA_SHT_THIS_ID = -1,
139 ATA_SHT_USE_CLUSTERING = 1,
140
141 /* struct ata_device stuff */
142 ATA_DFLAG_LBA = (1 << 0), /* device supports LBA */
143 ATA_DFLAG_LBA48 = (1 << 1), /* device supports LBA48 */
144 ATA_DFLAG_CDB_INTR = (1 << 2), /* device asserts INTRQ when ready for CDB */
145 ATA_DFLAG_NCQ = (1 << 3), /* device supports NCQ */
146 ATA_DFLAG_FLUSH_EXT = (1 << 4), /* do FLUSH_EXT instead of FLUSH */
147 ATA_DFLAG_ACPI_PENDING = (1 << 5), /* ACPI resume action pending */
148 ATA_DFLAG_ACPI_FAILED = (1 << 6), /* ACPI on devcfg has failed */
149 ATA_DFLAG_AN = (1 << 7), /* AN configured */
150 ATA_DFLAG_DMADIR = (1 << 10), /* device requires DMADIR */
151 ATA_DFLAG_CFG_MASK = (1 << 12) - 1,
152
153 ATA_DFLAG_PIO = (1 << 12), /* device limited to PIO mode */
154 ATA_DFLAG_NCQ_OFF = (1 << 13), /* device limited to non-NCQ mode */
155 ATA_DFLAG_SLEEPING = (1 << 15), /* device is sleeping */
156 ATA_DFLAG_DUBIOUS_XFER = (1 << 16), /* data transfer not verified */
157 ATA_DFLAG_NO_UNLOAD = (1 << 17), /* device doesn't support unload */
158 ATA_DFLAG_UNLOCK_HPA = (1 << 18), /* unlock HPA */
159 ATA_DFLAG_INIT_MASK = (1 << 24) - 1,
160
161 ATA_DFLAG_DETACH = (1 << 24),
162 ATA_DFLAG_DETACHED = (1 << 25),
163
164 ATA_DFLAG_DA = (1 << 26), /* device supports Device Attention */
165 ATA_DFLAG_DEVSLP = (1 << 27), /* device supports Device Sleep */
166 ATA_DFLAG_ACPI_DISABLED = (1 << 28), /* ACPI for the device is disabled */
167
168 ATA_DEV_UNKNOWN = 0, /* unknown device */
169 ATA_DEV_ATA = 1, /* ATA device */
170 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */
171 ATA_DEV_ATAPI = 3, /* ATAPI device */
172 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */
173 ATA_DEV_PMP = 5, /* SATA port multiplier */
174 ATA_DEV_PMP_UNSUP = 6, /* SATA port multiplier (unsupported) */
175 ATA_DEV_SEMB = 7, /* SEMB */
176 ATA_DEV_SEMB_UNSUP = 8, /* SEMB (unsupported) */
177 ATA_DEV_NONE = 9, /* no device */
178
179 /* struct ata_link flags */
180 ATA_LFLAG_NO_HRST = (1 << 1), /* avoid hardreset */
181 ATA_LFLAG_NO_SRST = (1 << 2), /* avoid softreset */
182 ATA_LFLAG_ASSUME_ATA = (1 << 3), /* assume ATA class */
183 ATA_LFLAG_ASSUME_SEMB = (1 << 4), /* assume SEMB class */
184 ATA_LFLAG_ASSUME_CLASS = ATA_LFLAG_ASSUME_ATA | ATA_LFLAG_ASSUME_SEMB,
185 ATA_LFLAG_NO_RETRY = (1 << 5), /* don't retry this link */
186 ATA_LFLAG_DISABLED = (1 << 6), /* link is disabled */
187 ATA_LFLAG_SW_ACTIVITY = (1 << 7), /* keep activity stats */
188 ATA_LFLAG_NO_LPM = (1 << 8), /* disable LPM on this link */
189 ATA_LFLAG_RST_ONCE = (1 << 9), /* limit recovery to one reset */
190 ATA_LFLAG_CHANGED = (1 << 10), /* LPM state changed on this link */
191
192 /* struct ata_port flags */
193 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */
194 /* (doesn't imply presence) */
195 ATA_FLAG_SATA = (1 << 1),
196 ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */
197 ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */
198 ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */
199 ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD
200 * doesn't handle PIO interrupts */
201 ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */
202 ATA_FLAG_NO_POWEROFF_SPINDOWN = (1 << 11), /* don't spindown before poweroff */
203 ATA_FLAG_NO_HIBERNATE_SPINDOWN = (1 << 12), /* don't spindown before hibernation */
204 ATA_FLAG_DEBUGMSG = (1 << 13),
205 ATA_FLAG_FPDMA_AA = (1 << 14), /* driver supports Auto-Activate */
206 ATA_FLAG_IGN_SIMPLEX = (1 << 15), /* ignore SIMPLEX */
207 ATA_FLAG_NO_IORDY = (1 << 16), /* controller lacks iordy */
208 ATA_FLAG_ACPI_SATA = (1 << 17), /* need native SATA ACPI layout */
209 ATA_FLAG_AN = (1 << 18), /* controller supports AN */
210 ATA_FLAG_PMP = (1 << 19), /* controller supports PMP */
211 ATA_FLAG_EM = (1 << 21), /* driver supports enclosure
212 * management */
213 ATA_FLAG_SW_ACTIVITY = (1 << 22), /* driver supports sw activity
214 * led */
215 ATA_FLAG_NO_DIPM = (1 << 23), /* host not happy with DIPM */
216
217 /* bits 24:31 of ap->flags are reserved for LLD specific flags */
218
219
220 /* struct ata_port pflags */
221 ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */
222 ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */
223 ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */
224 ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */
225 ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */
226 ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */
227 ATA_PFLAG_INITIALIZING = (1 << 7), /* being initialized, don't touch */
228 ATA_PFLAG_RESETTING = (1 << 8), /* reset in progress */
229 ATA_PFLAG_UNLOADING = (1 << 9), /* driver is being unloaded */
230 ATA_PFLAG_UNLOADED = (1 << 10), /* driver is unloaded */
231
232 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */
233 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */
234 ATA_PFLAG_INIT_GTM_VALID = (1 << 19), /* initial gtm data valid */
235
236 ATA_PFLAG_PIO32 = (1 << 20), /* 32bit PIO */
237 ATA_PFLAG_PIO32CHANGE = (1 << 21), /* 32bit PIO can be turned on/off */
238
239 /* struct ata_queued_cmd flags */
240 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */
241 ATA_QCFLAG_DMAMAP = (1 << 1), /* SG table is DMA mapped */
242 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */
243 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */
244 ATA_QCFLAG_CLEAR_EXCL = (1 << 5), /* clear excl_link on completion */
245 ATA_QCFLAG_QUIET = (1 << 6), /* don't report device error */
246 ATA_QCFLAG_RETRY = (1 << 7), /* retry after failure */
247
248 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */
249 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */
250 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */
251
252 /* host set flags */
253 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */
254 ATA_HOST_STARTED = (1 << 1), /* Host started */
255 ATA_HOST_PARALLEL_SCAN = (1 << 2), /* Ports on this host can be scanned in parallel */
256 ATA_HOST_IGNORE_ATA = (1 << 3), /* Ignore ATA devices on this host. */
257
258 /* bits 24:31 of host->flags are reserved for LLD specific flags */
259
260 /* various lengths of time */
261 ATA_TMOUT_BOOT = 30000, /* heuristic */
262 ATA_TMOUT_BOOT_QUICK = 7000, /* heuristic */
263 ATA_TMOUT_INTERNAL_QUICK = 5000,
264 ATA_TMOUT_MAX_PARK = 30000,
265
266 /*
267 * GoVault needs 2s and iVDR disk HHD424020F7SV00 800ms. 2s
268 * is too much without parallel probing. Use 2s if parallel
269 * probing is available, 800ms otherwise.
270 */
271 ATA_TMOUT_FF_WAIT_LONG = 2000,
272 ATA_TMOUT_FF_WAIT = 800,
273
274 /* Spec mandates to wait for ">= 2ms" before checking status
275 * after reset. We wait 150ms, because that was the magic
276 * delay used for ATAPI devices in Hale Landis's ATADRVR, for
277 * the period of time between when the ATA command register is
278 * written, and then status is checked. Because waiting for
279 * "a while" before checking status is fine, post SRST, we
280 * perform this magic delay here as well.
281 *
282 * Old drivers/ide uses the 2mS rule and then waits for ready.
283 */
284 ATA_WAIT_AFTER_RESET = 150,
285
286 /* If PMP is supported, we have to do follow-up SRST. As some
287 * PMPs don't send D2H Reg FIS after hardreset, LLDs are
288 * advised to wait only for the following duration before
289 * doing SRST.
290 */
291 ATA_TMOUT_PMP_SRST_WAIT = 5000,
292
293 /* When the LPM policy is set to ATA_LPM_MAX_POWER, there might
294 * be a spurious PHY event, so ignore the first PHY event that
295 * occurs within 10s after the policy change.
296 */
297 ATA_TMOUT_SPURIOUS_PHY = 10000,
298
299 /* ATA bus states */
300 BUS_UNKNOWN = 0,
301 BUS_DMA = 1,
302 BUS_IDLE = 2,
303 BUS_NOINTR = 3,
304 BUS_NODATA = 4,
305 BUS_TIMER = 5,
306 BUS_PIO = 6,
307 BUS_EDD = 7,
308 BUS_IDENTIFY = 8,
309 BUS_PACKET = 9,
310
311 /* SATA port states */
312 PORT_UNKNOWN = 0,
313 PORT_ENABLED = 1,
314 PORT_DISABLED = 2,
315
316 /* encoding various smaller bitmaps into a single
317 * unsigned long bitmap
318 */
319 ATA_NR_PIO_MODES = 7,
320 ATA_NR_MWDMA_MODES = 5,
321 ATA_NR_UDMA_MODES = 8,
322
323 ATA_SHIFT_PIO = 0,
324 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_NR_PIO_MODES,
325 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_NR_MWDMA_MODES,
326
327 /* size of buffer to pad xfers ending on unaligned boundaries */
328 ATA_DMA_PAD_SZ = 4,
329
330 /* ering size */
331 ATA_ERING_SIZE = 32,
332
333 /* return values for ->qc_defer */
334 ATA_DEFER_LINK = 1,
335 ATA_DEFER_PORT = 2,
336
337 /* desc_len for ata_eh_info and context */
338 ATA_EH_DESC_LEN = 80,
339
340 /* reset / recovery action types */
341 ATA_EH_REVALIDATE = (1 << 0),
342 ATA_EH_SOFTRESET = (1 << 1), /* meaningful only in ->prereset */
343 ATA_EH_HARDRESET = (1 << 2), /* meaningful only in ->prereset */
344 ATA_EH_RESET = ATA_EH_SOFTRESET | ATA_EH_HARDRESET,
345 ATA_EH_ENABLE_LINK = (1 << 3),
346 ATA_EH_PARK = (1 << 5), /* unload heads and stop I/O */
347
348 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE | ATA_EH_PARK,
349 ATA_EH_ALL_ACTIONS = ATA_EH_REVALIDATE | ATA_EH_RESET |
350 ATA_EH_ENABLE_LINK,
351
352 /* ata_eh_info->flags */
353 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */
354 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */
355 ATA_EHI_QUIET = (1 << 3), /* be quiet */
356 ATA_EHI_NO_RECOVERY = (1 << 4), /* no recovery */
357
358 ATA_EHI_DID_SOFTRESET = (1 << 16), /* already soft-reset this port */
359 ATA_EHI_DID_HARDRESET = (1 << 17), /* already soft-reset this port */
360 ATA_EHI_PRINTINFO = (1 << 18), /* print configuration info */
361 ATA_EHI_SETMODE = (1 << 19), /* configure transfer mode */
362 ATA_EHI_POST_SETMODE = (1 << 20), /* revalidating after setmode */
363
364 ATA_EHI_DID_RESET = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET,
365
366 /* mask of flags to transfer *to* the slave link */
367 ATA_EHI_TO_SLAVE_MASK = ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET,
368
369 /* max tries if error condition is still set after ->error_handler */
370 ATA_EH_MAX_TRIES = 5,
371
372 /* sometimes resuming a link requires several retries */
373 ATA_LINK_RESUME_TRIES = 5,
374
375 /* how hard are we gonna try to probe/recover devices */
376 ATA_PROBE_MAX_TRIES = 3,
377 ATA_EH_DEV_TRIES = 3,
378 ATA_EH_PMP_TRIES = 5,
379 ATA_EH_PMP_LINK_TRIES = 3,
380
381 SATA_PMP_RW_TIMEOUT = 3000, /* PMP read/write timeout */
382
383 /* This should match the actual table size of
384 * ata_eh_cmd_timeout_table in libata-eh.c.
385 */
386 ATA_EH_CMD_TIMEOUT_TABLE_SIZE = 6,
387
388 /* Horkage types. May be set by libata or controller on drives
389 (some horkage may be drive/controller pair dependent */
390
391 ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */
392 ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */
393 ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */
394 ATA_HORKAGE_MAX_SEC_128 = (1 << 3), /* Limit max sects to 128 */
395 ATA_HORKAGE_BROKEN_HPA = (1 << 4), /* Broken HPA */
396 ATA_HORKAGE_DISABLE = (1 << 5), /* Disable it */
397 ATA_HORKAGE_HPA_SIZE = (1 << 6), /* native size off by one */
398 ATA_HORKAGE_IVB = (1 << 8), /* cbl det validity bit bugs */
399 ATA_HORKAGE_STUCK_ERR = (1 << 9), /* stuck ERR on next PACKET */
400 ATA_HORKAGE_BRIDGE_OK = (1 << 10), /* no bridge limits */
401 ATA_HORKAGE_ATAPI_MOD16_DMA = (1 << 11), /* use ATAPI DMA for commands
402 not multiple of 16 bytes */
403 ATA_HORKAGE_FIRMWARE_WARN = (1 << 12), /* firmware update warning */
404 ATA_HORKAGE_1_5_GBPS = (1 << 13), /* force 1.5 Gbps */
405 ATA_HORKAGE_NOSETXFER = (1 << 14), /* skip SETXFER, SATA only */
406 ATA_HORKAGE_BROKEN_FPDMA_AA = (1 << 15), /* skip AA */
407 ATA_HORKAGE_DUMP_ID = (1 << 16), /* dump IDENTIFY data */
408 ATA_HORKAGE_MAX_SEC_LBA48 = (1 << 17), /* Set max sects to 65535 */
409 ATA_HORKAGE_ATAPI_DMADIR = (1 << 18), /* device requires dmadir */
410 ATA_HORKAGE_NOLPM = (1 << 20), /* don't use LPM */
411 ATA_HORKAGE_WD_BROKEN_LPM = (1 << 21), /* some WDs have broken LPM */
412 ATA_HORKAGE_NOTRIM = (1 << 24), /* don't use TRIM */
413
414 /* DMA mask for user DMA control: User visible values; DO NOT
415 renumber */
416 ATA_DMA_MASK_ATA = (1 << 0), /* DMA on ATA Disk */
417 ATA_DMA_MASK_ATAPI = (1 << 1), /* DMA on ATAPI */
418 ATA_DMA_MASK_CFA = (1 << 2), /* DMA on CF Card */
419
420 /* ATAPI command types */
421 ATAPI_READ = 0, /* READs */
422 ATAPI_WRITE = 1, /* WRITEs */
423 ATAPI_READ_CD = 2, /* READ CD [MSF] */
424 ATAPI_PASS_THRU = 3, /* SAT pass-thru */
425 ATAPI_MISC = 4, /* the rest */
426
427 /* Timing constants */
428 ATA_TIMING_SETUP = (1 << 0),
429 ATA_TIMING_ACT8B = (1 << 1),
430 ATA_TIMING_REC8B = (1 << 2),
431 ATA_TIMING_CYC8B = (1 << 3),
432 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
433 ATA_TIMING_CYC8B,
434 ATA_TIMING_ACTIVE = (1 << 4),
435 ATA_TIMING_RECOVER = (1 << 5),
436 ATA_TIMING_DMACK_HOLD = (1 << 6),
437 ATA_TIMING_CYCLE = (1 << 7),
438 ATA_TIMING_UDMA = (1 << 8),
439 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
440 ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
441 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
442 ATA_TIMING_DMACK_HOLD | ATA_TIMING_CYCLE |
443 ATA_TIMING_UDMA,
444
445 /* ACPI constants */
446 ATA_ACPI_FILTER_SETXFER = 1 << 0,
447 ATA_ACPI_FILTER_LOCK = 1 << 1,
448 ATA_ACPI_FILTER_DIPM = 1 << 2,
449 ATA_ACPI_FILTER_FPDMA_OFFSET = 1 << 3, /* FPDMA non-zero offset */
450 ATA_ACPI_FILTER_FPDMA_AA = 1 << 4, /* FPDMA auto activate */
451
452 ATA_ACPI_FILTER_DEFAULT = ATA_ACPI_FILTER_SETXFER |
453 ATA_ACPI_FILTER_LOCK |
454 ATA_ACPI_FILTER_DIPM,
455 };
456
457 enum ata_xfer_mask {
458 ATA_MASK_PIO = ((1LU << ATA_NR_PIO_MODES) - 1)
459 << ATA_SHIFT_PIO,
460 ATA_MASK_MWDMA = ((1LU << ATA_NR_MWDMA_MODES) - 1)
461 << ATA_SHIFT_MWDMA,
462 ATA_MASK_UDMA = ((1LU << ATA_NR_UDMA_MODES) - 1)
463 << ATA_SHIFT_UDMA,
464 };
465
466 enum hsm_task_states {
467 HSM_ST_IDLE, /* no command on going */
468 HSM_ST_FIRST, /* (waiting the device to)
469 write CDB or first data block */
470 HSM_ST, /* (waiting the device to) transfer data */
471 HSM_ST_LAST, /* (waiting the device to) complete command */
472 HSM_ST_ERR, /* error */
473 };
474
475 enum ata_completion_errors {
476 AC_ERR_DEV = (1 << 0), /* device reported error */
477 AC_ERR_HSM = (1 << 1), /* host state machine violation */
478 AC_ERR_TIMEOUT = (1 << 2), /* timeout */
479 AC_ERR_MEDIA = (1 << 3), /* media error */
480 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */
481 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */
482 AC_ERR_SYSTEM = (1 << 6), /* system error */
483 AC_ERR_INVALID = (1 << 7), /* invalid argument */
484 AC_ERR_OTHER = (1 << 8), /* unknown */
485 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */
486 AC_ERR_NCQ = (1 << 10), /* marker for offending NCQ qc */
487 };
488
489 /*
490 * Link power management policy: If you alter this, you also need to
491 * alter libata-scsi.c (for the ascii descriptions)
492 */
493 enum ata_lpm_policy {
494 ATA_LPM_UNKNOWN,
495 ATA_LPM_MAX_POWER,
496 ATA_LPM_MED_POWER,
497 ATA_LPM_MIN_POWER,
498 };
499
500 enum ata_lpm_hints {
501 ATA_LPM_EMPTY = (1 << 0), /* port empty/probing */
502 ATA_LPM_HIPM = (1 << 1), /* may use HIPM */
503 };
504
505 /* forward declarations */
506 struct scsi_device;
507 struct ata_port_operations;
508 struct ata_port;
509 struct ata_link;
510 struct ata_queued_cmd;
511
512 /* typedefs */
513 typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
514 typedef int (*ata_prereset_fn_t)(struct ata_link *link, unsigned long deadline);
515 typedef int (*ata_reset_fn_t)(struct ata_link *link, unsigned int *classes,
516 unsigned long deadline);
517 typedef void (*ata_postreset_fn_t)(struct ata_link *link, unsigned int *classes);
518
519 extern struct device_attribute dev_attr_link_power_management_policy;
520 extern struct device_attribute dev_attr_unload_heads;
521 extern struct device_attribute dev_attr_em_message_type;
522 extern struct device_attribute dev_attr_em_message;
523 extern struct device_attribute dev_attr_sw_activity;
524
525 enum sw_activity {
526 OFF,
527 BLINK_ON,
528 BLINK_OFF,
529 };
530
531 #ifdef CONFIG_ATA_SFF
532 struct ata_ioports {
533 void __iomem *cmd_addr;
534 void __iomem *data_addr;
535 void __iomem *error_addr;
536 void __iomem *feature_addr;
537 void __iomem *nsect_addr;
538 void __iomem *lbal_addr;
539 void __iomem *lbam_addr;
540 void __iomem *lbah_addr;
541 void __iomem *device_addr;
542 void __iomem *status_addr;
543 void __iomem *command_addr;
544 void __iomem *altstatus_addr;
545 void __iomem *ctl_addr;
546 #ifdef CONFIG_ATA_BMDMA
547 void __iomem *bmdma_addr;
548 #endif /* CONFIG_ATA_BMDMA */
549 void __iomem *scr_addr;
550 };
551 #endif /* CONFIG_ATA_SFF */
552
553 struct ata_host {
554 spinlock_t lock;
555 struct device *dev;
556 void __iomem * const *iomap;
557 unsigned int n_ports;
558 unsigned int n_tags; /* nr of NCQ tags */
559 void *private_data;
560 struct ata_port_operations *ops;
561 unsigned long flags;
562
563 struct mutex eh_mutex;
564 struct task_struct *eh_owner;
565
566 struct ata_port *simplex_claimed; /* channel owning the DMA */
567 struct ata_port *ports[0];
568 };
569
570 struct ata_queued_cmd {
571 struct ata_port *ap;
572 struct ata_device *dev;
573
574 struct scsi_cmnd *scsicmd;
575 void (*scsidone)(struct scsi_cmnd *);
576
577 struct ata_taskfile tf;
578 u8 cdb[ATAPI_CDB_LEN];
579
580 unsigned long flags; /* ATA_QCFLAG_xxx */
581 unsigned int tag;
582 unsigned int n_elem;
583 unsigned int orig_n_elem;
584
585 int dma_dir;
586
587 unsigned int sect_size;
588
589 unsigned int nbytes;
590 unsigned int extrabytes;
591 unsigned int curbytes;
592
593 struct scatterlist sgent;
594
595 struct scatterlist *sg;
596
597 struct scatterlist *cursg;
598 unsigned int cursg_ofs;
599
600 unsigned int err_mask;
601 struct ata_taskfile result_tf;
602 ata_qc_cb_t complete_fn;
603
604 void *private_data;
605 void *lldd_task;
606 };
607
608 struct ata_port_stats {
609 unsigned long unhandled_irq;
610 unsigned long idle_irq;
611 unsigned long rw_reqbuf;
612 };
613
614 struct ata_ering_entry {
615 unsigned int eflags;
616 unsigned int err_mask;
617 u64 timestamp;
618 };
619
620 struct ata_ering {
621 int cursor;
622 struct ata_ering_entry ring[ATA_ERING_SIZE];
623 };
624
625 struct ata_device {
626 struct ata_link *link;
627 unsigned int devno; /* 0 or 1 */
628 unsigned int horkage; /* List of broken features */
629 unsigned long flags; /* ATA_DFLAG_xxx */
630 struct scsi_device *sdev; /* attached SCSI device */
631 void *private_data;
632 #ifdef CONFIG_ATA_ACPI
633 union acpi_object *gtf_cache;
634 unsigned int gtf_filter;
635 #endif
636 #ifdef CONFIG_SATA_ZPODD
637 void *zpodd;
638 #endif
639 struct device tdev;
640 /* n_sector is CLEAR_BEGIN, read comment above CLEAR_BEGIN */
641 u64 n_sectors; /* size of device, if ATA */
642 u64 n_native_sectors; /* native size, if ATA */
643 unsigned int class; /* ATA_DEV_xxx */
644 unsigned long unpark_deadline;
645
646 u8 pio_mode;
647 u8 dma_mode;
648 u8 xfer_mode;
649 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
650
651 unsigned int multi_count; /* sectors count for
652 READ/WRITE MULTIPLE */
653 unsigned int max_sectors; /* per-device max sectors */
654 unsigned int cdb_len;
655
656 /* per-dev xfer mask */
657 unsigned long pio_mask;
658 unsigned long mwdma_mask;
659 unsigned long udma_mask;
660
661 /* for CHS addressing */
662 u16 cylinders; /* Number of cylinders */
663 u16 heads; /* Number of heads */
664 u16 sectors; /* Number of sectors per track */
665
666 union {
667 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
668 u32 gscr[SATA_PMP_GSCR_DWORDS]; /* PMP GSCR block */
669 } ____cacheline_aligned;
670
671 /* DEVSLP Timing Variables from Identify Device Data Log */
672 u8 devslp_timing[ATA_LOG_DEVSLP_SIZE];
673
674 /* error history */
675 int spdn_cnt;
676 /* ering is CLEAR_END, read comment above CLEAR_END */
677 struct ata_ering ering;
678 };
679
680 /* Fields between ATA_DEVICE_CLEAR_BEGIN and ATA_DEVICE_CLEAR_END are
681 * cleared to zero on ata_dev_init().
682 */
683 #define ATA_DEVICE_CLEAR_BEGIN offsetof(struct ata_device, n_sectors)
684 #define ATA_DEVICE_CLEAR_END offsetof(struct ata_device, ering)
685
686 struct ata_eh_info {
687 struct ata_device *dev; /* offending device */
688 u32 serror; /* SError from LLDD */
689 unsigned int err_mask; /* port-wide err_mask */
690 unsigned int action; /* ATA_EH_* action mask */
691 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */
692 unsigned int flags; /* ATA_EHI_* flags */
693
694 unsigned int probe_mask;
695
696 char desc[ATA_EH_DESC_LEN];
697 int desc_len;
698 };
699
700 struct ata_eh_context {
701 struct ata_eh_info i;
702 int tries[ATA_MAX_DEVICES];
703 int cmd_timeout_idx[ATA_MAX_DEVICES]
704 [ATA_EH_CMD_TIMEOUT_TABLE_SIZE];
705 unsigned int classes[ATA_MAX_DEVICES];
706 unsigned int did_probe_mask;
707 unsigned int unloaded_mask;
708 unsigned int saved_ncq_enabled;
709 u8 saved_xfer_mode[ATA_MAX_DEVICES];
710 /* timestamp for the last reset attempt or success */
711 unsigned long last_reset;
712 };
713
714 struct ata_acpi_drive
715 {
716 u32 pio;
717 u32 dma;
718 } __packed;
719
720 struct ata_acpi_gtm {
721 struct ata_acpi_drive drive[2];
722 u32 flags;
723 } __packed;
724
725 struct ata_link {
726 struct ata_port *ap;
727 int pmp; /* port multiplier port # */
728
729 struct device tdev;
730 unsigned int active_tag; /* active tag on this link */
731 u32 sactive; /* active NCQ commands */
732
733 unsigned int flags; /* ATA_LFLAG_xxx */
734
735 u32 saved_scontrol; /* SControl on probe */
736 unsigned int hw_sata_spd_limit;
737 unsigned int sata_spd_limit;
738 unsigned int sata_spd; /* current SATA PHY speed */
739 enum ata_lpm_policy lpm_policy;
740
741 /* record runtime error info, protected by host_set lock */
742 struct ata_eh_info eh_info;
743 /* EH context */
744 struct ata_eh_context eh_context;
745
746 struct ata_device device[ATA_MAX_DEVICES];
747
748 unsigned long last_lpm_change; /* when last LPM change happened */
749 };
750 #define ATA_LINK_CLEAR_BEGIN offsetof(struct ata_link, active_tag)
751 #define ATA_LINK_CLEAR_END offsetof(struct ata_link, device[0])
752
753 struct ata_port {
754 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */
755 struct ata_port_operations *ops;
756 spinlock_t *lock;
757 /* Flags owned by the EH context. Only EH should touch these once the
758 port is active */
759 unsigned long flags; /* ATA_FLAG_xxx */
760 /* Flags that change dynamically, protected by ap->lock */
761 unsigned int pflags; /* ATA_PFLAG_xxx */
762 unsigned int print_id; /* user visible unique port ID */
763 unsigned int port_no; /* 0 based port no. inside the host */
764
765 #ifdef CONFIG_ATA_SFF
766 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
767 u8 ctl; /* cache of ATA control register */
768 u8 last_ctl; /* Cache last written value */
769 struct ata_link* sff_pio_task_link; /* link currently used */
770 struct delayed_work sff_pio_task;
771 #ifdef CONFIG_ATA_BMDMA
772 struct ata_bmdma_prd *bmdma_prd; /* BMDMA SG list */
773 dma_addr_t bmdma_prd_dma; /* and its DMA mapping */
774 #endif /* CONFIG_ATA_BMDMA */
775 #endif /* CONFIG_ATA_SFF */
776
777 unsigned int pio_mask;
778 unsigned int mwdma_mask;
779 unsigned int udma_mask;
780 unsigned int cbl; /* cable type; ATA_CBL_xxx */
781
782 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
783 unsigned long qc_allocated;
784 unsigned int qc_active;
785 int nr_active_links; /* #links with active qcs */
786 unsigned int last_tag; /* track next tag hw expects */
787
788 struct ata_link link; /* host default link */
789 struct ata_link *slave_link; /* see ata_slave_link_init() */
790
791 int nr_pmp_links; /* nr of available PMP links */
792 struct ata_link *pmp_link; /* array of PMP links */
793 struct ata_link *excl_link; /* for PMP qc exclusion */
794
795 struct ata_port_stats stats;
796 struct ata_host *host;
797 struct device *dev;
798 struct device tdev;
799
800 struct mutex scsi_scan_mutex;
801 struct delayed_work hotplug_task;
802 struct work_struct scsi_rescan_task;
803
804 unsigned int hsm_task_state;
805
806 u32 msg_enable;
807 struct list_head eh_done_q;
808 wait_queue_head_t eh_wait_q;
809 int eh_tries;
810 struct completion park_req_pending;
811
812 pm_message_t pm_mesg;
813 int *pm_result;
814 enum ata_lpm_policy target_lpm_policy;
815
816 struct timer_list fastdrain_timer;
817 unsigned long fastdrain_cnt;
818
819 int em_message_type;
820 void *private_data;
821
822 #ifdef CONFIG_ATA_ACPI
823 struct ata_acpi_gtm __acpi_init_gtm; /* use ata_acpi_init_gtm() */
824 #endif
825 /* owned by EH */
826 u8 sector_buf[ATA_SECT_SIZE] ____cacheline_aligned;
827 };
828
829 /* The following initializer overrides a method to NULL whether one of
830 * its parent has the method defined or not. This is equivalent to
831 * ERR_PTR(-ENOENT). Unfortunately, ERR_PTR doesn't render a constant
832 * expression and thus can't be used as an initializer.
833 */
834 #define ATA_OP_NULL (void *)(unsigned long)(-ENOENT)
835
836 struct ata_port_operations {
837 /*
838 * Command execution
839 */
840 int (*qc_defer)(struct ata_queued_cmd *qc);
841 int (*check_atapi_dma)(struct ata_queued_cmd *qc);
842 void (*qc_prep)(struct ata_queued_cmd *qc);
843 unsigned int (*qc_issue)(struct ata_queued_cmd *qc);
844 bool (*qc_fill_rtf)(struct ata_queued_cmd *qc);
845
846 /*
847 * Configuration and exception handling
848 */
849 int (*cable_detect)(struct ata_port *ap);
850 unsigned long (*mode_filter)(struct ata_device *dev, unsigned long xfer_mask);
851 void (*set_piomode)(struct ata_port *ap, struct ata_device *dev);
852 void (*set_dmamode)(struct ata_port *ap, struct ata_device *dev);
853 int (*set_mode)(struct ata_link *link, struct ata_device **r_failed_dev);
854 unsigned int (*read_id)(struct ata_device *dev, struct ata_taskfile *tf, u16 *id);
855
856 void (*dev_config)(struct ata_device *dev);
857
858 void (*freeze)(struct ata_port *ap);
859 void (*thaw)(struct ata_port *ap);
860 ata_prereset_fn_t prereset;
861 ata_reset_fn_t softreset;
862 ata_reset_fn_t hardreset;
863 ata_postreset_fn_t postreset;
864 ata_prereset_fn_t pmp_prereset;
865 ata_reset_fn_t pmp_softreset;
866 ata_reset_fn_t pmp_hardreset;
867 ata_postreset_fn_t pmp_postreset;
868 void (*error_handler)(struct ata_port *ap);
869 void (*lost_interrupt)(struct ata_port *ap);
870 void (*post_internal_cmd)(struct ata_queued_cmd *qc);
871 void (*sched_eh)(struct ata_port *ap);
872 void (*end_eh)(struct ata_port *ap);
873
874 /*
875 * Optional features
876 */
877 int (*scr_read)(struct ata_link *link, unsigned int sc_reg, u32 *val);
878 int (*scr_write)(struct ata_link *link, unsigned int sc_reg, u32 val);
879 void (*pmp_attach)(struct ata_port *ap);
880 void (*pmp_detach)(struct ata_port *ap);
881 int (*set_lpm)(struct ata_link *link, enum ata_lpm_policy policy,
882 unsigned hints);
883
884 /*
885 * Start, stop, suspend and resume
886 */
887 int (*port_suspend)(struct ata_port *ap, pm_message_t mesg);
888 int (*port_resume)(struct ata_port *ap);
889 int (*port_start)(struct ata_port *ap);
890 void (*port_stop)(struct ata_port *ap);
891 void (*host_stop)(struct ata_host *host);
892
893 #ifdef CONFIG_ATA_SFF
894 /*
895 * SFF / taskfile oriented ops
896 */
897 void (*sff_dev_select)(struct ata_port *ap, unsigned int device);
898 void (*sff_set_devctl)(struct ata_port *ap, u8 ctl);
899 u8 (*sff_check_status)(struct ata_port *ap);
900 u8 (*sff_check_altstatus)(struct ata_port *ap);
901 void (*sff_tf_load)(struct ata_port *ap, const struct ata_taskfile *tf);
902 void (*sff_tf_read)(struct ata_port *ap, struct ata_taskfile *tf);
903 void (*sff_exec_command)(struct ata_port *ap,
904 const struct ata_taskfile *tf);
905 unsigned int (*sff_data_xfer)(struct ata_device *dev,
906 unsigned char *buf, unsigned int buflen, int rw);
907 void (*sff_irq_on)(struct ata_port *);
908 bool (*sff_irq_check)(struct ata_port *);
909 void (*sff_irq_clear)(struct ata_port *);
910 void (*sff_drain_fifo)(struct ata_queued_cmd *qc);
911
912 #ifdef CONFIG_ATA_BMDMA
913 void (*bmdma_setup)(struct ata_queued_cmd *qc);
914 void (*bmdma_start)(struct ata_queued_cmd *qc);
915 void (*bmdma_stop)(struct ata_queued_cmd *qc);
916 u8 (*bmdma_status)(struct ata_port *ap);
917 #endif /* CONFIG_ATA_BMDMA */
918 #endif /* CONFIG_ATA_SFF */
919
920 ssize_t (*em_show)(struct ata_port *ap, char *buf);
921 ssize_t (*em_store)(struct ata_port *ap, const char *message,
922 size_t size);
923 ssize_t (*sw_activity_show)(struct ata_device *dev, char *buf);
924 ssize_t (*sw_activity_store)(struct ata_device *dev,
925 enum sw_activity val);
926 /*
927 * Obsolete
928 */
929 void (*phy_reset)(struct ata_port *ap);
930 void (*eng_timeout)(struct ata_port *ap);
931
932 /*
933 * ->inherits must be the last field and all the preceding
934 * fields must be pointers.
935 */
936 const struct ata_port_operations *inherits;
937 };
938
939 struct ata_port_info {
940 unsigned long flags;
941 unsigned long link_flags;
942 unsigned long pio_mask;
943 unsigned long mwdma_mask;
944 unsigned long udma_mask;
945 struct ata_port_operations *port_ops;
946 void *private_data;
947 };
948
949 struct ata_timing {
950 unsigned short mode; /* ATA mode */
951 unsigned short setup; /* t1 */
952 unsigned short act8b; /* t2 for 8-bit I/O */
953 unsigned short rec8b; /* t2i for 8-bit I/O */
954 unsigned short cyc8b; /* t0 for 8-bit I/O */
955 unsigned short active; /* t2 or tD */
956 unsigned short recover; /* t2i or tK */
957 unsigned short dmack_hold; /* tj */
958 unsigned short cycle; /* t0 */
959 unsigned short udma; /* t2CYCTYP/2 */
960 };
961
962 /*
963 * Core layer - drivers/ata/libata-core.c
964 */
965 extern const unsigned long sata_deb_timing_normal[];
966 extern const unsigned long sata_deb_timing_hotplug[];
967 extern const unsigned long sata_deb_timing_long[];
968
969 extern struct ata_port_operations ata_dummy_port_ops;
970 extern const struct ata_port_info ata_dummy_port_info;
971
972 static inline const unsigned long *
973 sata_ehc_deb_timing(struct ata_eh_context *ehc)
974 {
975 if (ehc->i.flags & ATA_EHI_HOTPLUGGED)
976 return sata_deb_timing_hotplug;
977 else
978 return sata_deb_timing_normal;
979 }
980
981 static inline int ata_port_is_dummy(struct ata_port *ap)
982 {
983 return ap->ops == &ata_dummy_port_ops;
984 }
985
986 extern int sata_set_spd(struct ata_link *link);
987 extern int ata_std_prereset(struct ata_link *link, unsigned long deadline);
988 extern int ata_wait_after_reset(struct ata_link *link, unsigned long deadline,
989 int (*check_ready)(struct ata_link *link));
990 extern int sata_link_debounce(struct ata_link *link,
991 const unsigned long *params, unsigned long deadline);
992 extern int sata_link_resume(struct ata_link *link, const unsigned long *params,
993 unsigned long deadline);
994 extern int sata_link_scr_lpm(struct ata_link *link, enum ata_lpm_policy policy,
995 bool spm_wakeup);
996 extern int sata_link_hardreset(struct ata_link *link,
997 const unsigned long *timing, unsigned long deadline,
998 bool *online, int (*check_ready)(struct ata_link *));
999 extern int sata_std_hardreset(struct ata_link *link, unsigned int *class,
1000 unsigned long deadline);
1001 extern void ata_std_postreset(struct ata_link *link, unsigned int *classes);
1002
1003 extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports);
1004 extern struct ata_host *ata_host_alloc_pinfo(struct device *dev,
1005 const struct ata_port_info * const * ppi, int n_ports);
1006 extern int ata_slave_link_init(struct ata_port *ap);
1007 extern int ata_host_start(struct ata_host *host);
1008 extern int ata_host_register(struct ata_host *host,
1009 struct scsi_host_template *sht);
1010 extern int ata_host_activate(struct ata_host *host, int irq,
1011 irq_handler_t irq_handler, unsigned long irq_flags,
1012 struct scsi_host_template *sht);
1013 extern void ata_host_detach(struct ata_host *host);
1014 extern void ata_host_init(struct ata_host *, struct device *, struct ata_port_operations *);
1015 extern int ata_scsi_detect(struct scsi_host_template *sht);
1016 extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
1017 extern int ata_scsi_queuecmd(struct Scsi_Host *h, struct scsi_cmnd *cmd);
1018 extern int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *dev,
1019 int cmd, void __user *arg);
1020 extern void ata_sas_port_destroy(struct ata_port *);
1021 extern struct ata_port *ata_sas_port_alloc(struct ata_host *,
1022 struct ata_port_info *, struct Scsi_Host *);
1023 extern void ata_sas_async_probe(struct ata_port *ap);
1024 extern int ata_sas_sync_probe(struct ata_port *ap);
1025 extern int ata_sas_port_init(struct ata_port *);
1026 extern int ata_sas_port_start(struct ata_port *ap);
1027 extern void ata_sas_port_stop(struct ata_port *ap);
1028 extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *);
1029 extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, struct ata_port *ap);
1030 extern int sata_scr_valid(struct ata_link *link);
1031 extern int sata_scr_read(struct ata_link *link, int reg, u32 *val);
1032 extern int sata_scr_write(struct ata_link *link, int reg, u32 val);
1033 extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val);
1034 extern bool ata_link_online(struct ata_link *link);
1035 extern bool ata_link_offline(struct ata_link *link);
1036 #ifdef CONFIG_PM
1037 extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg);
1038 extern void ata_host_resume(struct ata_host *host);
1039 extern int ata_sas_port_async_suspend(struct ata_port *ap, int *async);
1040 extern int ata_sas_port_async_resume(struct ata_port *ap, int *async);
1041 #else
1042 static inline int ata_sas_port_async_suspend(struct ata_port *ap, int *async)
1043 {
1044 return 0;
1045 }
1046 static inline int ata_sas_port_async_resume(struct ata_port *ap, int *async)
1047 {
1048 return 0;
1049 }
1050 #endif
1051 extern int ata_ratelimit(void);
1052 extern void ata_msleep(struct ata_port *ap, unsigned int msecs);
1053 extern u32 ata_wait_register(struct ata_port *ap, void __iomem *reg, u32 mask,
1054 u32 val, unsigned long interval, unsigned long timeout);
1055 extern int atapi_cmd_type(u8 opcode);
1056 extern void ata_tf_to_fis(const struct ata_taskfile *tf,
1057 u8 pmp, int is_cmd, u8 *fis);
1058 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
1059 extern unsigned long ata_pack_xfermask(unsigned long pio_mask,
1060 unsigned long mwdma_mask, unsigned long udma_mask);
1061 extern void ata_unpack_xfermask(unsigned long xfer_mask,
1062 unsigned long *pio_mask, unsigned long *mwdma_mask,
1063 unsigned long *udma_mask);
1064 extern u8 ata_xfer_mask2mode(unsigned long xfer_mask);
1065 extern unsigned long ata_xfer_mode2mask(u8 xfer_mode);
1066 extern int ata_xfer_mode2shift(unsigned long xfer_mode);
1067 extern const char *ata_mode_string(unsigned long xfer_mask);
1068 extern unsigned long ata_id_xfermask(const u16 *id);
1069 extern int ata_std_qc_defer(struct ata_queued_cmd *qc);
1070 extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
1071 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
1072 unsigned int n_elem);
1073 extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
1074 extern void ata_dev_disable(struct ata_device *adev);
1075 extern void ata_id_string(const u16 *id, unsigned char *s,
1076 unsigned int ofs, unsigned int len);
1077 extern void ata_id_c_string(const u16 *id, unsigned char *s,
1078 unsigned int ofs, unsigned int len);
1079 extern unsigned int ata_do_dev_read_id(struct ata_device *dev,
1080 struct ata_taskfile *tf, u16 *id);
1081 extern void ata_qc_complete(struct ata_queued_cmd *qc);
1082 extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active);
1083 extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd);
1084 extern int ata_std_bios_param(struct scsi_device *sdev,
1085 struct block_device *bdev,
1086 sector_t capacity, int geom[]);
1087 extern void ata_scsi_unlock_native_capacity(struct scsi_device *sdev);
1088 extern int ata_scsi_slave_config(struct scsi_device *sdev);
1089 extern void ata_scsi_slave_destroy(struct scsi_device *sdev);
1090 extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
1091 int queue_depth, int reason);
1092 extern int __ata_change_queue_depth(struct ata_port *ap, struct scsi_device *sdev,
1093 int queue_depth, int reason);
1094 extern struct ata_device *ata_dev_pair(struct ata_device *adev);
1095 extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev);
1096 extern void ata_scsi_port_error_handler(struct Scsi_Host *host, struct ata_port *ap);
1097 extern void ata_scsi_cmd_error_handler(struct Scsi_Host *host, struct ata_port *ap, struct list_head *eh_q);
1098 extern bool sata_lpm_ignore_phy_events(struct ata_link *link);
1099
1100 extern int ata_cable_40wire(struct ata_port *ap);
1101 extern int ata_cable_80wire(struct ata_port *ap);
1102 extern int ata_cable_sata(struct ata_port *ap);
1103 extern int ata_cable_ignore(struct ata_port *ap);
1104 extern int ata_cable_unknown(struct ata_port *ap);
1105
1106 /* Timing helpers */
1107 extern unsigned int ata_pio_need_iordy(const struct ata_device *);
1108 extern const struct ata_timing *ata_timing_find_mode(u8 xfer_mode);
1109 extern int ata_timing_compute(struct ata_device *, unsigned short,
1110 struct ata_timing *, int, int);
1111 extern void ata_timing_merge(const struct ata_timing *,
1112 const struct ata_timing *, struct ata_timing *,
1113 unsigned int);
1114 extern u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle);
1115
1116 /* PCI */
1117 #ifdef CONFIG_PCI
1118 struct pci_dev;
1119
1120 struct pci_bits {
1121 unsigned int reg; /* PCI config register to read */
1122 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
1123 unsigned long mask;
1124 unsigned long val;
1125 };
1126
1127 extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
1128 extern void ata_pci_remove_one(struct pci_dev *pdev);
1129
1130 #ifdef CONFIG_PM
1131 extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg);
1132 extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev);
1133 extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
1134 extern int ata_pci_device_resume(struct pci_dev *pdev);
1135 #endif /* CONFIG_PM */
1136 #endif /* CONFIG_PCI */
1137
1138 struct platform_device;
1139
1140 extern int ata_platform_remove_one(struct platform_device *pdev);
1141
1142 /*
1143 * ACPI - drivers/ata/libata-acpi.c
1144 */
1145 #ifdef CONFIG_ATA_ACPI
1146 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
1147 {
1148 if (ap->pflags & ATA_PFLAG_INIT_GTM_VALID)
1149 return &ap->__acpi_init_gtm;
1150 return NULL;
1151 }
1152 int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm);
1153 int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *stm);
1154 unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev,
1155 const struct ata_acpi_gtm *gtm);
1156 acpi_handle ata_ap_acpi_handle(struct ata_port *ap);
1157 acpi_handle ata_dev_acpi_handle(struct ata_device *dev);
1158 int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm);
1159 #else
1160 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
1161 {
1162 return NULL;
1163 }
1164
1165 static inline int ata_acpi_stm(const struct ata_port *ap,
1166 struct ata_acpi_gtm *stm)
1167 {
1168 return -ENOSYS;
1169 }
1170
1171 static inline int ata_acpi_gtm(const struct ata_port *ap,
1172 struct ata_acpi_gtm *stm)
1173 {
1174 return -ENOSYS;
1175 }
1176
1177 static inline unsigned int ata_acpi_gtm_xfermask(struct ata_device *dev,
1178 const struct ata_acpi_gtm *gtm)
1179 {
1180 return 0;
1181 }
1182
1183 static inline int ata_acpi_cbl_80wire(struct ata_port *ap,
1184 const struct ata_acpi_gtm *gtm)
1185 {
1186 return 0;
1187 }
1188 #endif
1189
1190 /*
1191 * EH - drivers/ata/libata-eh.c
1192 */
1193 extern void ata_port_schedule_eh(struct ata_port *ap);
1194 extern void ata_port_wait_eh(struct ata_port *ap);
1195 extern int ata_link_abort(struct ata_link *link);
1196 extern int ata_port_abort(struct ata_port *ap);
1197 extern int ata_port_freeze(struct ata_port *ap);
1198 extern int sata_async_notification(struct ata_port *ap);
1199
1200 extern void ata_eh_freeze_port(struct ata_port *ap);
1201 extern void ata_eh_thaw_port(struct ata_port *ap);
1202
1203 extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
1204 extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
1205 extern void ata_eh_analyze_ncq_error(struct ata_link *link);
1206
1207 extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
1208 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
1209 ata_postreset_fn_t postreset);
1210 extern void ata_std_error_handler(struct ata_port *ap);
1211 extern void ata_std_sched_eh(struct ata_port *ap);
1212 extern void ata_std_end_eh(struct ata_port *ap);
1213 extern int ata_link_nr_enabled(struct ata_link *link);
1214
1215 /*
1216 * Base operations to inherit from and initializers for sht
1217 *
1218 * Operations
1219 *
1220 * base : Common to all libata drivers.
1221 * sata : SATA controllers w/ native interface.
1222 * pmp : SATA controllers w/ PMP support.
1223 * sff : SFF ATA controllers w/o BMDMA support.
1224 * bmdma : SFF ATA controllers w/ BMDMA support.
1225 *
1226 * sht initializers
1227 *
1228 * BASE : Common to all libata drivers. The user must set
1229 * sg_tablesize and dma_boundary.
1230 * PIO : SFF ATA controllers w/ only PIO support.
1231 * BMDMA : SFF ATA controllers w/ BMDMA support. sg_tablesize and
1232 * dma_boundary are set to BMDMA limits.
1233 * NCQ : SATA controllers supporting NCQ. The user must set
1234 * sg_tablesize, dma_boundary and can_queue.
1235 */
1236 extern const struct ata_port_operations ata_base_port_ops;
1237 extern const struct ata_port_operations sata_port_ops;
1238 extern struct device_attribute *ata_common_sdev_attrs[];
1239
1240 #define ATA_BASE_SHT(drv_name) \
1241 .module = THIS_MODULE, \
1242 .name = drv_name, \
1243 .ioctl = ata_scsi_ioctl, \
1244 .queuecommand = ata_scsi_queuecmd, \
1245 .can_queue = ATA_DEF_QUEUE, \
1246 .this_id = ATA_SHT_THIS_ID, \
1247 .cmd_per_lun = ATA_SHT_CMD_PER_LUN, \
1248 .emulated = ATA_SHT_EMULATED, \
1249 .use_clustering = ATA_SHT_USE_CLUSTERING, \
1250 .proc_name = drv_name, \
1251 .slave_configure = ata_scsi_slave_config, \
1252 .slave_destroy = ata_scsi_slave_destroy, \
1253 .bios_param = ata_std_bios_param, \
1254 .unlock_native_capacity = ata_scsi_unlock_native_capacity, \
1255 .sdev_attrs = ata_common_sdev_attrs
1256
1257 #define ATA_NCQ_SHT(drv_name) \
1258 ATA_BASE_SHT(drv_name), \
1259 .change_queue_depth = ata_scsi_change_queue_depth
1260
1261 /*
1262 * PMP helpers
1263 */
1264 #ifdef CONFIG_SATA_PMP
1265 static inline bool sata_pmp_supported(struct ata_port *ap)
1266 {
1267 return ap->flags & ATA_FLAG_PMP;
1268 }
1269
1270 static inline bool sata_pmp_attached(struct ata_port *ap)
1271 {
1272 return ap->nr_pmp_links != 0;
1273 }
1274
1275 static inline int ata_is_host_link(const struct ata_link *link)
1276 {
1277 return link == &link->ap->link || link == link->ap->slave_link;
1278 }
1279 #else /* CONFIG_SATA_PMP */
1280 static inline bool sata_pmp_supported(struct ata_port *ap)
1281 {
1282 return false;
1283 }
1284
1285 static inline bool sata_pmp_attached(struct ata_port *ap)
1286 {
1287 return false;
1288 }
1289
1290 static inline int ata_is_host_link(const struct ata_link *link)
1291 {
1292 return 1;
1293 }
1294 #endif /* CONFIG_SATA_PMP */
1295
1296 static inline int sata_srst_pmp(struct ata_link *link)
1297 {
1298 if (sata_pmp_supported(link->ap) && ata_is_host_link(link))
1299 return SATA_PMP_CTRL_PORT;
1300 return link->pmp;
1301 }
1302
1303 /*
1304 * printk helpers
1305 */
1306 __printf(3, 4)
1307 int ata_port_printk(const struct ata_port *ap, const char *level,
1308 const char *fmt, ...);
1309 __printf(3, 4)
1310 int ata_link_printk(const struct ata_link *link, const char *level,
1311 const char *fmt, ...);
1312 __printf(3, 4)
1313 int ata_dev_printk(const struct ata_device *dev, const char *level,
1314 const char *fmt, ...);
1315
1316 #define ata_port_err(ap, fmt, ...) \
1317 ata_port_printk(ap, KERN_ERR, fmt, ##__VA_ARGS__)
1318 #define ata_port_warn(ap, fmt, ...) \
1319 ata_port_printk(ap, KERN_WARNING, fmt, ##__VA_ARGS__)
1320 #define ata_port_notice(ap, fmt, ...) \
1321 ata_port_printk(ap, KERN_NOTICE, fmt, ##__VA_ARGS__)
1322 #define ata_port_info(ap, fmt, ...) \
1323 ata_port_printk(ap, KERN_INFO, fmt, ##__VA_ARGS__)
1324 #define ata_port_dbg(ap, fmt, ...) \
1325 ata_port_printk(ap, KERN_DEBUG, fmt, ##__VA_ARGS__)
1326
1327 #define ata_link_err(link, fmt, ...) \
1328 ata_link_printk(link, KERN_ERR, fmt, ##__VA_ARGS__)
1329 #define ata_link_warn(link, fmt, ...) \
1330 ata_link_printk(link, KERN_WARNING, fmt, ##__VA_ARGS__)
1331 #define ata_link_notice(link, fmt, ...) \
1332 ata_link_printk(link, KERN_NOTICE, fmt, ##__VA_ARGS__)
1333 #define ata_link_info(link, fmt, ...) \
1334 ata_link_printk(link, KERN_INFO, fmt, ##__VA_ARGS__)
1335 #define ata_link_dbg(link, fmt, ...) \
1336 ata_link_printk(link, KERN_DEBUG, fmt, ##__VA_ARGS__)
1337
1338 #define ata_dev_err(dev, fmt, ...) \
1339 ata_dev_printk(dev, KERN_ERR, fmt, ##__VA_ARGS__)
1340 #define ata_dev_warn(dev, fmt, ...) \
1341 ata_dev_printk(dev, KERN_WARNING, fmt, ##__VA_ARGS__)
1342 #define ata_dev_notice(dev, fmt, ...) \
1343 ata_dev_printk(dev, KERN_NOTICE, fmt, ##__VA_ARGS__)
1344 #define ata_dev_info(dev, fmt, ...) \
1345 ata_dev_printk(dev, KERN_INFO, fmt, ##__VA_ARGS__)
1346 #define ata_dev_dbg(dev, fmt, ...) \
1347 ata_dev_printk(dev, KERN_DEBUG, fmt, ##__VA_ARGS__)
1348
1349 void ata_print_version(const struct device *dev, const char *version);
1350
1351 /*
1352 * ata_eh_info helpers
1353 */
1354 extern __printf(2, 3)
1355 void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...);
1356 extern __printf(2, 3)
1357 void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...);
1358 extern void ata_ehi_clear_desc(struct ata_eh_info *ehi);
1359
1360 static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
1361 {
1362 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
1363 ehi->flags |= ATA_EHI_HOTPLUGGED;
1364 ehi->action |= ATA_EH_RESET | ATA_EH_ENABLE_LINK;
1365 ehi->err_mask |= AC_ERR_ATA_BUS;
1366 }
1367
1368 /*
1369 * port description helpers
1370 */
1371 extern __printf(2, 3)
1372 void ata_port_desc(struct ata_port *ap, const char *fmt, ...);
1373 #ifdef CONFIG_PCI
1374 extern void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset,
1375 const char *name);
1376 #endif
1377
1378 static inline unsigned int ata_tag_valid(unsigned int tag)
1379 {
1380 return (tag < ATA_MAX_QUEUE) ? 1 : 0;
1381 }
1382
1383 static inline unsigned int ata_tag_internal(unsigned int tag)
1384 {
1385 return tag == ATA_TAG_INTERNAL;
1386 }
1387
1388 /*
1389 * device helpers
1390 */
1391 static inline unsigned int ata_class_enabled(unsigned int class)
1392 {
1393 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI ||
1394 class == ATA_DEV_PMP || class == ATA_DEV_SEMB;
1395 }
1396
1397 static inline unsigned int ata_class_disabled(unsigned int class)
1398 {
1399 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP ||
1400 class == ATA_DEV_PMP_UNSUP || class == ATA_DEV_SEMB_UNSUP;
1401 }
1402
1403 static inline unsigned int ata_class_absent(unsigned int class)
1404 {
1405 return !ata_class_enabled(class) && !ata_class_disabled(class);
1406 }
1407
1408 static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
1409 {
1410 return ata_class_enabled(dev->class);
1411 }
1412
1413 static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
1414 {
1415 return ata_class_disabled(dev->class);
1416 }
1417
1418 static inline unsigned int ata_dev_absent(const struct ata_device *dev)
1419 {
1420 return ata_class_absent(dev->class);
1421 }
1422
1423 /*
1424 * link helpers
1425 */
1426 static inline int ata_link_max_devices(const struct ata_link *link)
1427 {
1428 if (ata_is_host_link(link) && link->ap->flags & ATA_FLAG_SLAVE_POSS)
1429 return 2;
1430 return 1;
1431 }
1432
1433 static inline int ata_link_active(struct ata_link *link)
1434 {
1435 return ata_tag_valid(link->active_tag) || link->sactive;
1436 }
1437
1438 /*
1439 * Iterators
1440 *
1441 * ATA_LITER_* constants are used to select link iteration mode and
1442 * ATA_DITER_* device iteration mode.
1443 *
1444 * For a custom iteration directly using ata_{link|dev}_next(), if
1445 * @link or @dev, respectively, is NULL, the first element is
1446 * returned. @dev and @link can be any valid device or link and the
1447 * next element according to the iteration mode will be returned.
1448 * After the last element, NULL is returned.
1449 */
1450 enum ata_link_iter_mode {
1451 ATA_LITER_EDGE, /* if present, PMP links only; otherwise,
1452 * host link. no slave link */
1453 ATA_LITER_HOST_FIRST, /* host link followed by PMP or slave links */
1454 ATA_LITER_PMP_FIRST, /* PMP links followed by host link,
1455 * slave link still comes after host link */
1456 };
1457
1458 enum ata_dev_iter_mode {
1459 ATA_DITER_ENABLED,
1460 ATA_DITER_ENABLED_REVERSE,
1461 ATA_DITER_ALL,
1462 ATA_DITER_ALL_REVERSE,
1463 };
1464
1465 extern struct ata_link *ata_link_next(struct ata_link *link,
1466 struct ata_port *ap,
1467 enum ata_link_iter_mode mode);
1468
1469 extern struct ata_device *ata_dev_next(struct ata_device *dev,
1470 struct ata_link *link,
1471 enum ata_dev_iter_mode mode);
1472
1473 /*
1474 * Shortcut notation for iterations
1475 *
1476 * ata_for_each_link() iterates over each link of @ap according to
1477 * @mode. @link points to the current link in the loop. @link is
1478 * NULL after loop termination. ata_for_each_dev() works the same way
1479 * except that it iterates over each device of @link.
1480 *
1481 * Note that the mode prefixes ATA_{L|D}ITER_ shouldn't need to be
1482 * specified when using the following shorthand notations. Only the
1483 * mode itself (EDGE, HOST_FIRST, ENABLED, etc...) should be
1484 * specified. This not only increases brevity but also makes it
1485 * impossible to use ATA_LITER_* for device iteration or vice-versa.
1486 */
1487 #define ata_for_each_link(link, ap, mode) \
1488 for ((link) = ata_link_next(NULL, (ap), ATA_LITER_##mode); (link); \
1489 (link) = ata_link_next((link), (ap), ATA_LITER_##mode))
1490
1491 #define ata_for_each_dev(dev, link, mode) \
1492 for ((dev) = ata_dev_next(NULL, (link), ATA_DITER_##mode); (dev); \
1493 (dev) = ata_dev_next((dev), (link), ATA_DITER_##mode))
1494
1495 /**
1496 * ata_ncq_enabled - Test whether NCQ is enabled
1497 * @dev: ATA device to test for
1498 *
1499 * LOCKING:
1500 * spin_lock_irqsave(host lock)
1501 *
1502 * RETURNS:
1503 * 1 if NCQ is enabled for @dev, 0 otherwise.
1504 */
1505 static inline int ata_ncq_enabled(struct ata_device *dev)
1506 {
1507 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF |
1508 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ;
1509 }
1510
1511 static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
1512 {
1513 qc->tf.ctl |= ATA_NIEN;
1514 }
1515
1516 static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap,
1517 unsigned int tag)
1518 {
1519 if (likely(ata_tag_valid(tag)))
1520 return &ap->qcmd[tag];
1521 return NULL;
1522 }
1523
1524 static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap,
1525 unsigned int tag)
1526 {
1527 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
1528
1529 if (unlikely(!qc) || !ap->ops->error_handler)
1530 return qc;
1531
1532 if ((qc->flags & (ATA_QCFLAG_ACTIVE |
1533 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE)
1534 return qc;
1535
1536 return NULL;
1537 }
1538
1539 static inline unsigned int ata_qc_raw_nbytes(struct ata_queued_cmd *qc)
1540 {
1541 return qc->nbytes - min(qc->extrabytes, qc->nbytes);
1542 }
1543
1544 static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
1545 {
1546 memset(tf, 0, sizeof(*tf));
1547
1548 #ifdef CONFIG_ATA_SFF
1549 tf->ctl = dev->link->ap->ctl;
1550 #else
1551 tf->ctl = ATA_DEVCTL_OBS;
1552 #endif
1553 if (dev->devno == 0)
1554 tf->device = ATA_DEVICE_OBS;
1555 else
1556 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
1557 }
1558
1559 static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
1560 {
1561 qc->dma_dir = DMA_NONE;
1562 qc->sg = NULL;
1563 qc->flags = 0;
1564 qc->cursg = NULL;
1565 qc->cursg_ofs = 0;
1566 qc->nbytes = qc->extrabytes = qc->curbytes = 0;
1567 qc->n_elem = 0;
1568 qc->err_mask = 0;
1569 qc->sect_size = ATA_SECT_SIZE;
1570
1571 ata_tf_init(qc->dev, &qc->tf);
1572
1573 /* init result_tf such that it indicates normal completion */
1574 qc->result_tf.command = ATA_DRDY;
1575 qc->result_tf.feature = 0;
1576 }
1577
1578 static inline int ata_try_flush_cache(const struct ata_device *dev)
1579 {
1580 return ata_id_wcache_enabled(dev->id) ||
1581 ata_id_has_flush(dev->id) ||
1582 ata_id_has_flush_ext(dev->id);
1583 }
1584
1585 static inline unsigned int ac_err_mask(u8 status)
1586 {
1587 if (status & (ATA_BUSY | ATA_DRQ))
1588 return AC_ERR_HSM;
1589 if (status & (ATA_ERR | ATA_DF))
1590 return AC_ERR_DEV;
1591 return 0;
1592 }
1593
1594 static inline unsigned int __ac_err_mask(u8 status)
1595 {
1596 unsigned int mask = ac_err_mask(status);
1597 if (mask == 0)
1598 return AC_ERR_OTHER;
1599 return mask;
1600 }
1601
1602 static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
1603 {
1604 return *(struct ata_port **)&host->hostdata[0];
1605 }
1606
1607 static inline int ata_check_ready(u8 status)
1608 {
1609 if (!(status & ATA_BUSY))
1610 return 1;
1611
1612 /* 0xff indicates either no device or device not ready */
1613 if (status == 0xff)
1614 return -ENODEV;
1615
1616 return 0;
1617 }
1618
1619 static inline unsigned long ata_deadline(unsigned long from_jiffies,
1620 unsigned long timeout_msecs)
1621 {
1622 return from_jiffies + msecs_to_jiffies(timeout_msecs);
1623 }
1624
1625 /* Don't open code these in drivers as there are traps. Firstly the range may
1626 change in future hardware and specs, secondly 0xFF means 'no DMA' but is
1627 > UDMA_0. Dyma ddreigiau */
1628
1629 static inline int ata_using_mwdma(struct ata_device *adev)
1630 {
1631 if (adev->dma_mode >= XFER_MW_DMA_0 && adev->dma_mode <= XFER_MW_DMA_4)
1632 return 1;
1633 return 0;
1634 }
1635
1636 static inline int ata_using_udma(struct ata_device *adev)
1637 {
1638 if (adev->dma_mode >= XFER_UDMA_0 && adev->dma_mode <= XFER_UDMA_7)
1639 return 1;
1640 return 0;
1641 }
1642
1643 static inline int ata_dma_enabled(struct ata_device *adev)
1644 {
1645 return (adev->dma_mode == 0xFF ? 0 : 1);
1646 }
1647
1648 /**************************************************************************
1649 * PMP - drivers/ata/libata-pmp.c
1650 */
1651 #ifdef CONFIG_SATA_PMP
1652
1653 extern const struct ata_port_operations sata_pmp_port_ops;
1654
1655 extern int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc);
1656 extern void sata_pmp_error_handler(struct ata_port *ap);
1657
1658 #else /* CONFIG_SATA_PMP */
1659
1660 #define sata_pmp_port_ops sata_port_ops
1661 #define sata_pmp_qc_defer_cmd_switch ata_std_qc_defer
1662 #define sata_pmp_error_handler ata_std_error_handler
1663
1664 #endif /* CONFIG_SATA_PMP */
1665
1666
1667 /**************************************************************************
1668 * SFF - drivers/ata/libata-sff.c
1669 */
1670 #ifdef CONFIG_ATA_SFF
1671
1672 extern const struct ata_port_operations ata_sff_port_ops;
1673 extern const struct ata_port_operations ata_bmdma32_port_ops;
1674
1675 /* PIO only, sg_tablesize and dma_boundary limits can be removed */
1676 #define ATA_PIO_SHT(drv_name) \
1677 ATA_BASE_SHT(drv_name), \
1678 .sg_tablesize = LIBATA_MAX_PRD, \
1679 .dma_boundary = ATA_DMA_BOUNDARY
1680
1681 extern void ata_sff_dev_select(struct ata_port *ap, unsigned int device);
1682 extern u8 ata_sff_check_status(struct ata_port *ap);
1683 extern void ata_sff_pause(struct ata_port *ap);
1684 extern void ata_sff_dma_pause(struct ata_port *ap);
1685 extern int ata_sff_busy_sleep(struct ata_port *ap,
1686 unsigned long timeout_pat, unsigned long timeout);
1687 extern int ata_sff_wait_ready(struct ata_link *link, unsigned long deadline);
1688 extern void ata_sff_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
1689 extern void ata_sff_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
1690 extern void ata_sff_exec_command(struct ata_port *ap,
1691 const struct ata_taskfile *tf);
1692 extern unsigned int ata_sff_data_xfer(struct ata_device *dev,
1693 unsigned char *buf, unsigned int buflen, int rw);
1694 extern unsigned int ata_sff_data_xfer32(struct ata_device *dev,
1695 unsigned char *buf, unsigned int buflen, int rw);
1696 extern unsigned int ata_sff_data_xfer_noirq(struct ata_device *dev,
1697 unsigned char *buf, unsigned int buflen, int rw);
1698 extern void ata_sff_irq_on(struct ata_port *ap);
1699 extern void ata_sff_irq_clear(struct ata_port *ap);
1700 extern int ata_sff_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
1701 u8 status, int in_wq);
1702 extern void ata_sff_queue_work(struct work_struct *work);
1703 extern void ata_sff_queue_delayed_work(struct delayed_work *dwork,
1704 unsigned long delay);
1705 extern void ata_sff_queue_pio_task(struct ata_link *link, unsigned long delay);
1706 extern unsigned int ata_sff_qc_issue(struct ata_queued_cmd *qc);
1707 extern bool ata_sff_qc_fill_rtf(struct ata_queued_cmd *qc);
1708 extern unsigned int ata_sff_port_intr(struct ata_port *ap,
1709 struct ata_queued_cmd *qc);
1710 extern irqreturn_t ata_sff_interrupt(int irq, void *dev_instance);
1711 extern void ata_sff_lost_interrupt(struct ata_port *ap);
1712 extern void ata_sff_freeze(struct ata_port *ap);
1713 extern void ata_sff_thaw(struct ata_port *ap);
1714 extern int ata_sff_prereset(struct ata_link *link, unsigned long deadline);
1715 extern unsigned int ata_sff_dev_classify(struct ata_device *dev, int present,
1716 u8 *r_err);
1717 extern int ata_sff_wait_after_reset(struct ata_link *link, unsigned int devmask,
1718 unsigned long deadline);
1719 extern int ata_sff_softreset(struct ata_link *link, unsigned int *classes,
1720 unsigned long deadline);
1721 extern int sata_sff_hardreset(struct ata_link *link, unsigned int *class,
1722 unsigned long deadline);
1723 extern void ata_sff_postreset(struct ata_link *link, unsigned int *classes);
1724 extern void ata_sff_drain_fifo(struct ata_queued_cmd *qc);
1725 extern void ata_sff_error_handler(struct ata_port *ap);
1726 extern void ata_sff_std_ports(struct ata_ioports *ioaddr);
1727 #ifdef CONFIG_PCI
1728 extern int ata_pci_sff_init_host(struct ata_host *host);
1729 extern int ata_pci_sff_prepare_host(struct pci_dev *pdev,
1730 const struct ata_port_info * const * ppi,
1731 struct ata_host **r_host);
1732 extern int ata_pci_sff_activate_host(struct ata_host *host,
1733 irq_handler_t irq_handler,
1734 struct scsi_host_template *sht);
1735 extern int ata_pci_sff_init_one(struct pci_dev *pdev,
1736 const struct ata_port_info * const * ppi,
1737 struct scsi_host_template *sht, void *host_priv, int hflags);
1738 #endif /* CONFIG_PCI */
1739
1740 #ifdef CONFIG_ATA_BMDMA
1741
1742 extern const struct ata_port_operations ata_bmdma_port_ops;
1743
1744 #define ATA_BMDMA_SHT(drv_name) \
1745 ATA_BASE_SHT(drv_name), \
1746 .sg_tablesize = LIBATA_MAX_PRD, \
1747 .dma_boundary = ATA_DMA_BOUNDARY
1748
1749 extern void ata_bmdma_qc_prep(struct ata_queued_cmd *qc);
1750 extern unsigned int ata_bmdma_qc_issue(struct ata_queued_cmd *qc);
1751 extern void ata_bmdma_dumb_qc_prep(struct ata_queued_cmd *qc);
1752 extern unsigned int ata_bmdma_port_intr(struct ata_port *ap,
1753 struct ata_queued_cmd *qc);
1754 extern irqreturn_t ata_bmdma_interrupt(int irq, void *dev_instance);
1755 extern void ata_bmdma_error_handler(struct ata_port *ap);
1756 extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc);
1757 extern void ata_bmdma_irq_clear(struct ata_port *ap);
1758 extern void ata_bmdma_setup(struct ata_queued_cmd *qc);
1759 extern void ata_bmdma_start(struct ata_queued_cmd *qc);
1760 extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
1761 extern u8 ata_bmdma_status(struct ata_port *ap);
1762 extern int ata_bmdma_port_start(struct ata_port *ap);
1763 extern int ata_bmdma_port_start32(struct ata_port *ap);
1764
1765 #ifdef CONFIG_PCI
1766 extern int ata_pci_bmdma_clear_simplex(struct pci_dev *pdev);
1767 extern void ata_pci_bmdma_init(struct ata_host *host);
1768 extern int ata_pci_bmdma_prepare_host(struct pci_dev *pdev,
1769 const struct ata_port_info * const * ppi,
1770 struct ata_host **r_host);
1771 extern int ata_pci_bmdma_init_one(struct pci_dev *pdev,
1772 const struct ata_port_info * const * ppi,
1773 struct scsi_host_template *sht,
1774 void *host_priv, int hflags);
1775 #endif /* CONFIG_PCI */
1776 #endif /* CONFIG_ATA_BMDMA */
1777
1778 /**
1779 * ata_sff_busy_wait - Wait for a port status register
1780 * @ap: Port to wait for.
1781 * @bits: bits that must be clear
1782 * @max: number of 10uS waits to perform
1783 *
1784 * Waits up to max*10 microseconds for the selected bits in the port's
1785 * status register to be cleared.
1786 * Returns final value of status register.
1787 *
1788 * LOCKING:
1789 * Inherited from caller.
1790 */
1791 static inline u8 ata_sff_busy_wait(struct ata_port *ap, unsigned int bits,
1792 unsigned int max)
1793 {
1794 u8 status;
1795
1796 do {
1797 udelay(10);
1798 status = ap->ops->sff_check_status(ap);
1799 max--;
1800 } while (status != 0xff && (status & bits) && (max > 0));
1801
1802 return status;
1803 }
1804
1805 /**
1806 * ata_wait_idle - Wait for a port to be idle.
1807 * @ap: Port to wait for.
1808 *
1809 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
1810 * Returns final value of status register.
1811 *
1812 * LOCKING:
1813 * Inherited from caller.
1814 */
1815 static inline u8 ata_wait_idle(struct ata_port *ap)
1816 {
1817 u8 status = ata_sff_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
1818
1819 #ifdef ATA_DEBUG
1820 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ)))
1821 ata_port_printk(ap, KERN_DEBUG, "abnormal Status 0x%X\n",
1822 status);
1823 #endif
1824
1825 return status;
1826 }
1827 #endif /* CONFIG_ATA_SFF */
1828
1829 #endif /* __LINUX_LIBATA_H__ */
kernel source for telekom puls (alcatel/mediatek)