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spi-topcliff-pch: Fix issue for transmitting over 4KByte
[zen-stable.git] / include / linux / libata.h
blobcafc09a64fe43636cbc1cf9f16366eb5c3e9ef06
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_DEV_UNKNOWN = 0, /* unknown device */
165 ATA_DEV_ATA = 1, /* ATA device */
166 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */
167 ATA_DEV_ATAPI = 3, /* ATAPI device */
168 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */
169 ATA_DEV_PMP = 5, /* SATA port multiplier */
170 ATA_DEV_PMP_UNSUP = 6, /* SATA port multiplier (unsupported) */
171 ATA_DEV_SEMB = 7, /* SEMB */
172 ATA_DEV_SEMB_UNSUP = 8, /* SEMB (unsupported) */
173 ATA_DEV_NONE = 9, /* no device */
174
175 /* struct ata_link flags */
176 ATA_LFLAG_NO_HRST = (1 << 1), /* avoid hardreset */
177 ATA_LFLAG_NO_SRST = (1 << 2), /* avoid softreset */
178 ATA_LFLAG_ASSUME_ATA = (1 << 3), /* assume ATA class */
179 ATA_LFLAG_ASSUME_SEMB = (1 << 4), /* assume SEMB class */
180 ATA_LFLAG_ASSUME_CLASS = ATA_LFLAG_ASSUME_ATA | ATA_LFLAG_ASSUME_SEMB,
181 ATA_LFLAG_NO_RETRY = (1 << 5), /* don't retry this link */
182 ATA_LFLAG_DISABLED = (1 << 6), /* link is disabled */
183 ATA_LFLAG_SW_ACTIVITY = (1 << 7), /* keep activity stats */
184 ATA_LFLAG_NO_LPM = (1 << 8), /* disable LPM on this link */
185
186 /* struct ata_port flags */
187 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */
188 /* (doesn't imply presence) */
189 ATA_FLAG_SATA = (1 << 1),
190 ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */
191 ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */
192 ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */
193 ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD
194 * doesn't handle PIO interrupts */
195 ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */
196 ATA_FLAG_NO_POWEROFF_SPINDOWN = (1 << 11), /* don't spindown before poweroff */
197 ATA_FLAG_NO_HIBERNATE_SPINDOWN = (1 << 12), /* don't spindown before hibernation */
198 ATA_FLAG_DEBUGMSG = (1 << 13),
199 ATA_FLAG_FPDMA_AA = (1 << 14), /* driver supports Auto-Activate */
200 ATA_FLAG_IGN_SIMPLEX = (1 << 15), /* ignore SIMPLEX */
201 ATA_FLAG_NO_IORDY = (1 << 16), /* controller lacks iordy */
202 ATA_FLAG_ACPI_SATA = (1 << 17), /* need native SATA ACPI layout */
203 ATA_FLAG_AN = (1 << 18), /* controller supports AN */
204 ATA_FLAG_PMP = (1 << 19), /* controller supports PMP */
205 ATA_FLAG_EM = (1 << 21), /* driver supports enclosure
206 * management */
207 ATA_FLAG_SW_ACTIVITY = (1 << 22), /* driver supports sw activity
208 * led */
209 ATA_FLAG_NO_DIPM = (1 << 23), /* host not happy with DIPM */
210
211 /* bits 24:31 of ap->flags are reserved for LLD specific flags */
212
213
214 /* struct ata_port pflags */
215 ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */
216 ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */
217 ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */
218 ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */
219 ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */
220 ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */
221 ATA_PFLAG_INITIALIZING = (1 << 7), /* being initialized, don't touch */
222 ATA_PFLAG_RESETTING = (1 << 8), /* reset in progress */
223 ATA_PFLAG_UNLOADING = (1 << 9), /* driver is being unloaded */
224 ATA_PFLAG_UNLOADED = (1 << 10), /* driver is unloaded */
225
226 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */
227 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */
228 ATA_PFLAG_INIT_GTM_VALID = (1 << 19), /* initial gtm data valid */
229
230 ATA_PFLAG_PIO32 = (1 << 20), /* 32bit PIO */
231 ATA_PFLAG_PIO32CHANGE = (1 << 21), /* 32bit PIO can be turned on/off */
232
233 /* struct ata_queued_cmd flags */
234 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */
235 ATA_QCFLAG_DMAMAP = (1 << 1), /* SG table is DMA mapped */
236 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */
237 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */
238 ATA_QCFLAG_CLEAR_EXCL = (1 << 5), /* clear excl_link on completion */
239 ATA_QCFLAG_QUIET = (1 << 6), /* don't report device error */
240 ATA_QCFLAG_RETRY = (1 << 7), /* retry after failure */
241
242 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */
243 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */
244 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */
245
246 /* host set flags */
247 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */
248 ATA_HOST_STARTED = (1 << 1), /* Host started */
249 ATA_HOST_PARALLEL_SCAN = (1 << 2), /* Ports on this host can be scanned in parallel */
250
251 /* bits 24:31 of host->flags are reserved for LLD specific flags */
252
253 /* various lengths of time */
254 ATA_TMOUT_BOOT = 30000, /* heuristic */
255 ATA_TMOUT_BOOT_QUICK = 7000, /* heuristic */
256 ATA_TMOUT_INTERNAL_QUICK = 5000,
257 ATA_TMOUT_MAX_PARK = 30000,
258
259 /*
260 * GoVault needs 2s and iVDR disk HHD424020F7SV00 800ms. 2s
261 * is too much without parallel probing. Use 2s if parallel
262 * probing is available, 800ms otherwise.
263 */
264 ATA_TMOUT_FF_WAIT_LONG = 2000,
265 ATA_TMOUT_FF_WAIT = 800,
266
267 /* Spec mandates to wait for ">= 2ms" before checking status
268 * after reset. We wait 150ms, because that was the magic
269 * delay used for ATAPI devices in Hale Landis's ATADRVR, for
270 * the period of time between when the ATA command register is
271 * written, and then status is checked. Because waiting for
272 * "a while" before checking status is fine, post SRST, we
273 * perform this magic delay here as well.
274 *
275 * Old drivers/ide uses the 2mS rule and then waits for ready.
276 */
277 ATA_WAIT_AFTER_RESET = 150,
278
279 /* If PMP is supported, we have to do follow-up SRST. As some
280 * PMPs don't send D2H Reg FIS after hardreset, LLDs are
281 * advised to wait only for the following duration before
282 * doing SRST.
283 */
284 ATA_TMOUT_PMP_SRST_WAIT = 5000,
285
286 /* ATA bus states */
287 BUS_UNKNOWN = 0,
288 BUS_DMA = 1,
289 BUS_IDLE = 2,
290 BUS_NOINTR = 3,
291 BUS_NODATA = 4,
292 BUS_TIMER = 5,
293 BUS_PIO = 6,
294 BUS_EDD = 7,
295 BUS_IDENTIFY = 8,
296 BUS_PACKET = 9,
297
298 /* SATA port states */
299 PORT_UNKNOWN = 0,
300 PORT_ENABLED = 1,
301 PORT_DISABLED = 2,
302
303 /* encoding various smaller bitmaps into a single
304 * unsigned long bitmap
305 */
306 ATA_NR_PIO_MODES = 7,
307 ATA_NR_MWDMA_MODES = 5,
308 ATA_NR_UDMA_MODES = 8,
309
310 ATA_SHIFT_PIO = 0,
311 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_NR_PIO_MODES,
312 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_NR_MWDMA_MODES,
313
314 /* size of buffer to pad xfers ending on unaligned boundaries */
315 ATA_DMA_PAD_SZ = 4,
316
317 /* ering size */
318 ATA_ERING_SIZE = 32,
319
320 /* return values for ->qc_defer */
321 ATA_DEFER_LINK = 1,
322 ATA_DEFER_PORT = 2,
323
324 /* desc_len for ata_eh_info and context */
325 ATA_EH_DESC_LEN = 80,
326
327 /* reset / recovery action types */
328 ATA_EH_REVALIDATE = (1 << 0),
329 ATA_EH_SOFTRESET = (1 << 1), /* meaningful only in ->prereset */
330 ATA_EH_HARDRESET = (1 << 2), /* meaningful only in ->prereset */
331 ATA_EH_RESET = ATA_EH_SOFTRESET | ATA_EH_HARDRESET,
332 ATA_EH_ENABLE_LINK = (1 << 3),
333 ATA_EH_PARK = (1 << 5), /* unload heads and stop I/O */
334
335 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE | ATA_EH_PARK,
336 ATA_EH_ALL_ACTIONS = ATA_EH_REVALIDATE | ATA_EH_RESET |
337 ATA_EH_ENABLE_LINK,
338
339 /* ata_eh_info->flags */
340 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */
341 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */
342 ATA_EHI_QUIET = (1 << 3), /* be quiet */
343 ATA_EHI_NO_RECOVERY = (1 << 4), /* no recovery */
344
345 ATA_EHI_DID_SOFTRESET = (1 << 16), /* already soft-reset this port */
346 ATA_EHI_DID_HARDRESET = (1 << 17), /* already soft-reset this port */
347 ATA_EHI_PRINTINFO = (1 << 18), /* print configuration info */
348 ATA_EHI_SETMODE = (1 << 19), /* configure transfer mode */
349 ATA_EHI_POST_SETMODE = (1 << 20), /* revalidating after setmode */
350
351 ATA_EHI_DID_RESET = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET,
352
353 /* mask of flags to transfer *to* the slave link */
354 ATA_EHI_TO_SLAVE_MASK = ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET,
355
356 /* max tries if error condition is still set after ->error_handler */
357 ATA_EH_MAX_TRIES = 5,
358
359 /* sometimes resuming a link requires several retries */
360 ATA_LINK_RESUME_TRIES = 5,
361
362 /* how hard are we gonna try to probe/recover devices */
363 ATA_PROBE_MAX_TRIES = 3,
364 ATA_EH_DEV_TRIES = 3,
365 ATA_EH_PMP_TRIES = 5,
366 ATA_EH_PMP_LINK_TRIES = 3,
367
368 SATA_PMP_RW_TIMEOUT = 3000, /* PMP read/write timeout */
369
370 /* This should match the actual table size of
371 * ata_eh_cmd_timeout_table in libata-eh.c.
372 */
373 ATA_EH_CMD_TIMEOUT_TABLE_SIZE = 6,
374
375 /* Horkage types. May be set by libata or controller on drives
376 (some horkage may be drive/controller pair dependent */
377
378 ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */
379 ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */
380 ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */
381 ATA_HORKAGE_MAX_SEC_128 = (1 << 3), /* Limit max sects to 128 */
382 ATA_HORKAGE_BROKEN_HPA = (1 << 4), /* Broken HPA */
383 ATA_HORKAGE_DISABLE = (1 << 5), /* Disable it */
384 ATA_HORKAGE_HPA_SIZE = (1 << 6), /* native size off by one */
385 ATA_HORKAGE_IVB = (1 << 8), /* cbl det validity bit bugs */
386 ATA_HORKAGE_STUCK_ERR = (1 << 9), /* stuck ERR on next PACKET */
387 ATA_HORKAGE_BRIDGE_OK = (1 << 10), /* no bridge limits */
388 ATA_HORKAGE_ATAPI_MOD16_DMA = (1 << 11), /* use ATAPI DMA for commands
389 not multiple of 16 bytes */
390 ATA_HORKAGE_FIRMWARE_WARN = (1 << 12), /* firmware update warning */
391 ATA_HORKAGE_1_5_GBPS = (1 << 13), /* force 1.5 Gbps */
392 ATA_HORKAGE_NOSETXFER = (1 << 14), /* skip SETXFER, SATA only */
393 ATA_HORKAGE_BROKEN_FPDMA_AA = (1 << 15), /* skip AA */
394 ATA_HORKAGE_DUMP_ID = (1 << 16), /* dump IDENTIFY data */
395
396 /* DMA mask for user DMA control: User visible values; DO NOT
397 renumber */
398 ATA_DMA_MASK_ATA = (1 << 0), /* DMA on ATA Disk */
399 ATA_DMA_MASK_ATAPI = (1 << 1), /* DMA on ATAPI */
400 ATA_DMA_MASK_CFA = (1 << 2), /* DMA on CF Card */
401
402 /* ATAPI command types */
403 ATAPI_READ = 0, /* READs */
404 ATAPI_WRITE = 1, /* WRITEs */
405 ATAPI_READ_CD = 2, /* READ CD [MSF] */
406 ATAPI_PASS_THRU = 3, /* SAT pass-thru */
407 ATAPI_MISC = 4, /* the rest */
408
409 /* Timing constants */
410 ATA_TIMING_SETUP = (1 << 0),
411 ATA_TIMING_ACT8B = (1 << 1),
412 ATA_TIMING_REC8B = (1 << 2),
413 ATA_TIMING_CYC8B = (1 << 3),
414 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
415 ATA_TIMING_CYC8B,
416 ATA_TIMING_ACTIVE = (1 << 4),
417 ATA_TIMING_RECOVER = (1 << 5),
418 ATA_TIMING_DMACK_HOLD = (1 << 6),
419 ATA_TIMING_CYCLE = (1 << 7),
420 ATA_TIMING_UDMA = (1 << 8),
421 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
422 ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
423 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
424 ATA_TIMING_DMACK_HOLD | ATA_TIMING_CYCLE |
425 ATA_TIMING_UDMA,
426
427 /* ACPI constants */
428 ATA_ACPI_FILTER_SETXFER = 1 << 0,
429 ATA_ACPI_FILTER_LOCK = 1 << 1,
430 ATA_ACPI_FILTER_DIPM = 1 << 2,
431 ATA_ACPI_FILTER_FPDMA_OFFSET = 1 << 3, /* FPDMA non-zero offset */
432 ATA_ACPI_FILTER_FPDMA_AA = 1 << 4, /* FPDMA auto activate */
433
434 ATA_ACPI_FILTER_DEFAULT = ATA_ACPI_FILTER_SETXFER |
435 ATA_ACPI_FILTER_LOCK |
436 ATA_ACPI_FILTER_DIPM,
437 };
438
439 enum ata_xfer_mask {
440 ATA_MASK_PIO = ((1LU << ATA_NR_PIO_MODES) - 1)
441 << ATA_SHIFT_PIO,
442 ATA_MASK_MWDMA = ((1LU << ATA_NR_MWDMA_MODES) - 1)
443 << ATA_SHIFT_MWDMA,
444 ATA_MASK_UDMA = ((1LU << ATA_NR_UDMA_MODES) - 1)
445 << ATA_SHIFT_UDMA,
446 };
447
448 enum hsm_task_states {
449 HSM_ST_IDLE, /* no command on going */
450 HSM_ST_FIRST, /* (waiting the device to)
451 write CDB or first data block */
452 HSM_ST, /* (waiting the device to) transfer data */
453 HSM_ST_LAST, /* (waiting the device to) complete command */
454 HSM_ST_ERR, /* error */
455 };
456
457 enum ata_completion_errors {
458 AC_ERR_DEV = (1 << 0), /* device reported error */
459 AC_ERR_HSM = (1 << 1), /* host state machine violation */
460 AC_ERR_TIMEOUT = (1 << 2), /* timeout */
461 AC_ERR_MEDIA = (1 << 3), /* media error */
462 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */
463 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */
464 AC_ERR_SYSTEM = (1 << 6), /* system error */
465 AC_ERR_INVALID = (1 << 7), /* invalid argument */
466 AC_ERR_OTHER = (1 << 8), /* unknown */
467 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */
468 AC_ERR_NCQ = (1 << 10), /* marker for offending NCQ qc */
469 };
470
471 /*
472 * Link power management policy: If you alter this, you also need to
473 * alter libata-scsi.c (for the ascii descriptions)
474 */
475 enum ata_lpm_policy {
476 ATA_LPM_UNKNOWN,
477 ATA_LPM_MAX_POWER,
478 ATA_LPM_MED_POWER,
479 ATA_LPM_MIN_POWER,
480 };
481
482 enum ata_lpm_hints {
483 ATA_LPM_EMPTY = (1 << 0), /* port empty/probing */
484 ATA_LPM_HIPM = (1 << 1), /* may use HIPM */
485 };
486
487 /* forward declarations */
488 struct scsi_device;
489 struct ata_port_operations;
490 struct ata_port;
491 struct ata_link;
492 struct ata_queued_cmd;
493
494 /* typedefs */
495 typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
496 typedef int (*ata_prereset_fn_t)(struct ata_link *link, unsigned long deadline);
497 typedef int (*ata_reset_fn_t)(struct ata_link *link, unsigned int *classes,
498 unsigned long deadline);
499 typedef void (*ata_postreset_fn_t)(struct ata_link *link, unsigned int *classes);
500
501 extern struct device_attribute dev_attr_link_power_management_policy;
502 extern struct device_attribute dev_attr_unload_heads;
503 extern struct device_attribute dev_attr_em_message_type;
504 extern struct device_attribute dev_attr_em_message;
505 extern struct device_attribute dev_attr_sw_activity;
506
507 enum sw_activity {
508 OFF,
509 BLINK_ON,
510 BLINK_OFF,
511 };
512
513 #ifdef CONFIG_ATA_SFF
514 struct ata_ioports {
515 void __iomem *cmd_addr;
516 void __iomem *data_addr;
517 void __iomem *error_addr;
518 void __iomem *feature_addr;
519 void __iomem *nsect_addr;
520 void __iomem *lbal_addr;
521 void __iomem *lbam_addr;
522 void __iomem *lbah_addr;
523 void __iomem *device_addr;
524 void __iomem *status_addr;
525 void __iomem *command_addr;
526 void __iomem *altstatus_addr;
527 void __iomem *ctl_addr;
528 #ifdef CONFIG_ATA_BMDMA
529 void __iomem *bmdma_addr;
530 #endif /* CONFIG_ATA_BMDMA */
531 void __iomem *scr_addr;
532 };
533 #endif /* CONFIG_ATA_SFF */
534
535 struct ata_host {
536 spinlock_t lock;
537 struct device *dev;
538 void __iomem * const *iomap;
539 unsigned int n_ports;
540 void *private_data;
541 struct ata_port_operations *ops;
542 unsigned long flags;
543
544 struct mutex eh_mutex;
545 struct task_struct *eh_owner;
546
547 #ifdef CONFIG_ATA_ACPI
548 acpi_handle acpi_handle;
549 #endif
550 struct ata_port *simplex_claimed; /* channel owning the DMA */
551 struct ata_port *ports[0];
552 };
553
554 struct ata_queued_cmd {
555 struct ata_port *ap;
556 struct ata_device *dev;
557
558 struct scsi_cmnd *scsicmd;
559 void (*scsidone)(struct scsi_cmnd *);
560
561 struct ata_taskfile tf;
562 u8 cdb[ATAPI_CDB_LEN];
563
564 unsigned long flags; /* ATA_QCFLAG_xxx */
565 unsigned int tag;
566 unsigned int n_elem;
567 unsigned int orig_n_elem;
568
569 int dma_dir;
570
571 unsigned int sect_size;
572
573 unsigned int nbytes;
574 unsigned int extrabytes;
575 unsigned int curbytes;
576
577 struct scatterlist sgent;
578
579 struct scatterlist *sg;
580
581 struct scatterlist *cursg;
582 unsigned int cursg_ofs;
583
584 unsigned int err_mask;
585 struct ata_taskfile result_tf;
586 ata_qc_cb_t complete_fn;
587
588 void *private_data;
589 void *lldd_task;
590 };
591
592 struct ata_port_stats {
593 unsigned long unhandled_irq;
594 unsigned long idle_irq;
595 unsigned long rw_reqbuf;
596 };
597
598 struct ata_ering_entry {
599 unsigned int eflags;
600 unsigned int err_mask;
601 u64 timestamp;
602 };
603
604 struct ata_ering {
605 int cursor;
606 struct ata_ering_entry ring[ATA_ERING_SIZE];
607 };
608
609 struct ata_device {
610 struct ata_link *link;
611 unsigned int devno; /* 0 or 1 */
612 unsigned int horkage; /* List of broken features */
613 unsigned long flags; /* ATA_DFLAG_xxx */
614 struct scsi_device *sdev; /* attached SCSI device */
615 void *private_data;
616 #ifdef CONFIG_ATA_ACPI
617 acpi_handle acpi_handle;
618 union acpi_object *gtf_cache;
619 unsigned int gtf_filter;
620 #endif
621 struct device tdev;
622 /* n_sector is CLEAR_BEGIN, read comment above CLEAR_BEGIN */
623 u64 n_sectors; /* size of device, if ATA */
624 u64 n_native_sectors; /* native size, if ATA */
625 unsigned int class; /* ATA_DEV_xxx */
626 unsigned long unpark_deadline;
627
628 u8 pio_mode;
629 u8 dma_mode;
630 u8 xfer_mode;
631 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
632
633 unsigned int multi_count; /* sectors count for
634 READ/WRITE MULTIPLE */
635 unsigned int max_sectors; /* per-device max sectors */
636 unsigned int cdb_len;
637
638 /* per-dev xfer mask */
639 unsigned long pio_mask;
640 unsigned long mwdma_mask;
641 unsigned long udma_mask;
642
643 /* for CHS addressing */
644 u16 cylinders; /* Number of cylinders */
645 u16 heads; /* Number of heads */
646 u16 sectors; /* Number of sectors per track */
647
648 union {
649 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
650 u32 gscr[SATA_PMP_GSCR_DWORDS]; /* PMP GSCR block */
651 };
652
653 /* error history */
654 int spdn_cnt;
655 /* ering is CLEAR_END, read comment above CLEAR_END */
656 struct ata_ering ering;
657 };
658
659 /* Fields between ATA_DEVICE_CLEAR_BEGIN and ATA_DEVICE_CLEAR_END are
660 * cleared to zero on ata_dev_init().
661 */
662 #define ATA_DEVICE_CLEAR_BEGIN offsetof(struct ata_device, n_sectors)
663 #define ATA_DEVICE_CLEAR_END offsetof(struct ata_device, ering)
664
665 struct ata_eh_info {
666 struct ata_device *dev; /* offending device */
667 u32 serror; /* SError from LLDD */
668 unsigned int err_mask; /* port-wide err_mask */
669 unsigned int action; /* ATA_EH_* action mask */
670 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */
671 unsigned int flags; /* ATA_EHI_* flags */
672
673 unsigned int probe_mask;
674
675 char desc[ATA_EH_DESC_LEN];
676 int desc_len;
677 };
678
679 struct ata_eh_context {
680 struct ata_eh_info i;
681 int tries[ATA_MAX_DEVICES];
682 int cmd_timeout_idx[ATA_MAX_DEVICES]
683 [ATA_EH_CMD_TIMEOUT_TABLE_SIZE];
684 unsigned int classes[ATA_MAX_DEVICES];
685 unsigned int did_probe_mask;
686 unsigned int unloaded_mask;
687 unsigned int saved_ncq_enabled;
688 u8 saved_xfer_mode[ATA_MAX_DEVICES];
689 /* timestamp for the last reset attempt or success */
690 unsigned long last_reset;
691 };
692
693 struct ata_acpi_drive
694 {
695 u32 pio;
696 u32 dma;
697 } __packed;
698
699 struct ata_acpi_gtm {
700 struct ata_acpi_drive drive[2];
701 u32 flags;
702 } __packed;
703
704 struct ata_link {
705 struct ata_port *ap;
706 int pmp; /* port multiplier port # */
707
708 struct device tdev;
709 unsigned int active_tag; /* active tag on this link */
710 u32 sactive; /* active NCQ commands */
711
712 unsigned int flags; /* ATA_LFLAG_xxx */
713
714 u32 saved_scontrol; /* SControl on probe */
715 unsigned int hw_sata_spd_limit;
716 unsigned int sata_spd_limit;
717 unsigned int sata_spd; /* current SATA PHY speed */
718 enum ata_lpm_policy lpm_policy;
719
720 /* record runtime error info, protected by host_set lock */
721 struct ata_eh_info eh_info;
722 /* EH context */
723 struct ata_eh_context eh_context;
724
725 struct ata_device device[ATA_MAX_DEVICES];
726 };
727 #define ATA_LINK_CLEAR_BEGIN offsetof(struct ata_link, active_tag)
728 #define ATA_LINK_CLEAR_END offsetof(struct ata_link, device[0])
729
730 struct ata_port {
731 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */
732 struct ata_port_operations *ops;
733 spinlock_t *lock;
734 /* Flags owned by the EH context. Only EH should touch these once the
735 port is active */
736 unsigned long flags; /* ATA_FLAG_xxx */
737 /* Flags that change dynamically, protected by ap->lock */
738 unsigned int pflags; /* ATA_PFLAG_xxx */
739 unsigned int print_id; /* user visible unique port ID */
740 unsigned int port_no; /* 0 based port no. inside the host */
741
742 #ifdef CONFIG_ATA_SFF
743 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
744 u8 ctl; /* cache of ATA control register */
745 u8 last_ctl; /* Cache last written value */
746 struct ata_link* sff_pio_task_link; /* link currently used */
747 struct delayed_work sff_pio_task;
748 #ifdef CONFIG_ATA_BMDMA
749 struct ata_bmdma_prd *bmdma_prd; /* BMDMA SG list */
750 dma_addr_t bmdma_prd_dma; /* and its DMA mapping */
751 #endif /* CONFIG_ATA_BMDMA */
752 #endif /* CONFIG_ATA_SFF */
753
754 unsigned int pio_mask;
755 unsigned int mwdma_mask;
756 unsigned int udma_mask;
757 unsigned int cbl; /* cable type; ATA_CBL_xxx */
758
759 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
760 unsigned long qc_allocated;
761 unsigned int qc_active;
762 int nr_active_links; /* #links with active qcs */
763
764 struct ata_link link; /* host default link */
765 struct ata_link *slave_link; /* see ata_slave_link_init() */
766
767 int nr_pmp_links; /* nr of available PMP links */
768 struct ata_link *pmp_link; /* array of PMP links */
769 struct ata_link *excl_link; /* for PMP qc exclusion */
770
771 struct ata_port_stats stats;
772 struct ata_host *host;
773 struct device *dev;
774 struct device tdev;
775
776 struct mutex scsi_scan_mutex;
777 struct delayed_work hotplug_task;
778 struct work_struct scsi_rescan_task;
779
780 unsigned int hsm_task_state;
781
782 u32 msg_enable;
783 struct list_head eh_done_q;
784 wait_queue_head_t eh_wait_q;
785 int eh_tries;
786 struct completion park_req_pending;
787
788 pm_message_t pm_mesg;
789 int *pm_result;
790 enum ata_lpm_policy target_lpm_policy;
791
792 struct timer_list fastdrain_timer;
793 unsigned long fastdrain_cnt;
794
795 int em_message_type;
796 void *private_data;
797
798 #ifdef CONFIG_ATA_ACPI
799 acpi_handle acpi_handle;
800 struct ata_acpi_gtm __acpi_init_gtm; /* use ata_acpi_init_gtm() */
801 #endif
802 /* owned by EH */
803 u8 sector_buf[ATA_SECT_SIZE] ____cacheline_aligned;
804 };
805
806 /* The following initializer overrides a method to NULL whether one of
807 * its parent has the method defined or not. This is equivalent to
808 * ERR_PTR(-ENOENT). Unfortunately, ERR_PTR doesn't render a constant
809 * expression and thus can't be used as an initializer.
810 */
811 #define ATA_OP_NULL (void *)(unsigned long)(-ENOENT)
812
813 struct ata_port_operations {
814 /*
815 * Command execution
816 */
817 int (*qc_defer)(struct ata_queued_cmd *qc);
818 int (*check_atapi_dma)(struct ata_queued_cmd *qc);
819 void (*qc_prep)(struct ata_queued_cmd *qc);
820 unsigned int (*qc_issue)(struct ata_queued_cmd *qc);
821 bool (*qc_fill_rtf)(struct ata_queued_cmd *qc);
822
823 /*
824 * Configuration and exception handling
825 */
826 int (*cable_detect)(struct ata_port *ap);
827 unsigned long (*mode_filter)(struct ata_device *dev, unsigned long xfer_mask);
828 void (*set_piomode)(struct ata_port *ap, struct ata_device *dev);
829 void (*set_dmamode)(struct ata_port *ap, struct ata_device *dev);
830 int (*set_mode)(struct ata_link *link, struct ata_device **r_failed_dev);
831 unsigned int (*read_id)(struct ata_device *dev, struct ata_taskfile *tf, u16 *id);
832
833 void (*dev_config)(struct ata_device *dev);
834
835 void (*freeze)(struct ata_port *ap);
836 void (*thaw)(struct ata_port *ap);
837 ata_prereset_fn_t prereset;
838 ata_reset_fn_t softreset;
839 ata_reset_fn_t hardreset;
840 ata_postreset_fn_t postreset;
841 ata_prereset_fn_t pmp_prereset;
842 ata_reset_fn_t pmp_softreset;
843 ata_reset_fn_t pmp_hardreset;
844 ata_postreset_fn_t pmp_postreset;
845 void (*error_handler)(struct ata_port *ap);
846 void (*lost_interrupt)(struct ata_port *ap);
847 void (*post_internal_cmd)(struct ata_queued_cmd *qc);
848
849 /*
850 * Optional features
851 */
852 int (*scr_read)(struct ata_link *link, unsigned int sc_reg, u32 *val);
853 int (*scr_write)(struct ata_link *link, unsigned int sc_reg, u32 val);
854 void (*pmp_attach)(struct ata_port *ap);
855 void (*pmp_detach)(struct ata_port *ap);
856 int (*set_lpm)(struct ata_link *link, enum ata_lpm_policy policy,
857 unsigned hints);
858
859 /*
860 * Start, stop, suspend and resume
861 */
862 int (*port_suspend)(struct ata_port *ap, pm_message_t mesg);
863 int (*port_resume)(struct ata_port *ap);
864 int (*port_start)(struct ata_port *ap);
865 void (*port_stop)(struct ata_port *ap);
866 void (*host_stop)(struct ata_host *host);
867
868 #ifdef CONFIG_ATA_SFF
869 /*
870 * SFF / taskfile oriented ops
871 */
872 void (*sff_dev_select)(struct ata_port *ap, unsigned int device);
873 void (*sff_set_devctl)(struct ata_port *ap, u8 ctl);
874 u8 (*sff_check_status)(struct ata_port *ap);
875 u8 (*sff_check_altstatus)(struct ata_port *ap);
876 void (*sff_tf_load)(struct ata_port *ap, const struct ata_taskfile *tf);
877 void (*sff_tf_read)(struct ata_port *ap, struct ata_taskfile *tf);
878 void (*sff_exec_command)(struct ata_port *ap,
879 const struct ata_taskfile *tf);
880 unsigned int (*sff_data_xfer)(struct ata_device *dev,
881 unsigned char *buf, unsigned int buflen, int rw);
882 void (*sff_irq_on)(struct ata_port *);
883 bool (*sff_irq_check)(struct ata_port *);
884 void (*sff_irq_clear)(struct ata_port *);
885 void (*sff_drain_fifo)(struct ata_queued_cmd *qc);
886
887 #ifdef CONFIG_ATA_BMDMA
888 void (*bmdma_setup)(struct ata_queued_cmd *qc);
889 void (*bmdma_start)(struct ata_queued_cmd *qc);
890 void (*bmdma_stop)(struct ata_queued_cmd *qc);
891 u8 (*bmdma_status)(struct ata_port *ap);
892 #endif /* CONFIG_ATA_BMDMA */
893 #endif /* CONFIG_ATA_SFF */
894
895 ssize_t (*em_show)(struct ata_port *ap, char *buf);
896 ssize_t (*em_store)(struct ata_port *ap, const char *message,
897 size_t size);
898 ssize_t (*sw_activity_show)(struct ata_device *dev, char *buf);
899 ssize_t (*sw_activity_store)(struct ata_device *dev,
900 enum sw_activity val);
901 /*
902 * Obsolete
903 */
904 void (*phy_reset)(struct ata_port *ap);
905 void (*eng_timeout)(struct ata_port *ap);
906
907 /*
908 * ->inherits must be the last field and all the preceding
909 * fields must be pointers.
910 */
911 const struct ata_port_operations *inherits;
912 };
913
914 struct ata_port_info {
915 unsigned long flags;
916 unsigned long link_flags;
917 unsigned long pio_mask;
918 unsigned long mwdma_mask;
919 unsigned long udma_mask;
920 struct ata_port_operations *port_ops;
921 void *private_data;
922 };
923
924 struct ata_timing {
925 unsigned short mode; /* ATA mode */
926 unsigned short setup; /* t1 */
927 unsigned short act8b; /* t2 for 8-bit I/O */
928 unsigned short rec8b; /* t2i for 8-bit I/O */
929 unsigned short cyc8b; /* t0 for 8-bit I/O */
930 unsigned short active; /* t2 or tD */
931 unsigned short recover; /* t2i or tK */
932 unsigned short dmack_hold; /* tj */
933 unsigned short cycle; /* t0 */
934 unsigned short udma; /* t2CYCTYP/2 */
935 };
936
937 /*
938 * Core layer - drivers/ata/libata-core.c
939 */
940 extern const unsigned long sata_deb_timing_normal[];
941 extern const unsigned long sata_deb_timing_hotplug[];
942 extern const unsigned long sata_deb_timing_long[];
943
944 extern struct ata_port_operations ata_dummy_port_ops;
945 extern const struct ata_port_info ata_dummy_port_info;
946
947 static inline const unsigned long *
948 sata_ehc_deb_timing(struct ata_eh_context *ehc)
949 {
950 if (ehc->i.flags & ATA_EHI_HOTPLUGGED)
951 return sata_deb_timing_hotplug;
952 else
953 return sata_deb_timing_normal;
954 }
955
956 static inline int ata_port_is_dummy(struct ata_port *ap)
957 {
958 return ap->ops == &ata_dummy_port_ops;
959 }
960
961 extern int sata_set_spd(struct ata_link *link);
962 extern int ata_std_prereset(struct ata_link *link, unsigned long deadline);
963 extern int ata_wait_after_reset(struct ata_link *link, unsigned long deadline,
964 int (*check_ready)(struct ata_link *link));
965 extern int sata_link_debounce(struct ata_link *link,
966 const unsigned long *params, unsigned long deadline);
967 extern int sata_link_resume(struct ata_link *link, const unsigned long *params,
968 unsigned long deadline);
969 extern int sata_link_scr_lpm(struct ata_link *link, enum ata_lpm_policy policy,
970 bool spm_wakeup);
971 extern int sata_link_hardreset(struct ata_link *link,
972 const unsigned long *timing, unsigned long deadline,
973 bool *online, int (*check_ready)(struct ata_link *));
974 extern int sata_std_hardreset(struct ata_link *link, unsigned int *class,
975 unsigned long deadline);
976 extern void ata_std_postreset(struct ata_link *link, unsigned int *classes);
977
978 extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports);
979 extern struct ata_host *ata_host_alloc_pinfo(struct device *dev,
980 const struct ata_port_info * const * ppi, int n_ports);
981 extern int ata_slave_link_init(struct ata_port *ap);
982 extern int ata_host_start(struct ata_host *host);
983 extern int ata_host_register(struct ata_host *host,
984 struct scsi_host_template *sht);
985 extern int ata_host_activate(struct ata_host *host, int irq,
986 irq_handler_t irq_handler, unsigned long irq_flags,
987 struct scsi_host_template *sht);
988 extern void ata_host_detach(struct ata_host *host);
989 extern void ata_host_init(struct ata_host *, struct device *,
990 unsigned long, struct ata_port_operations *);
991 extern int ata_scsi_detect(struct scsi_host_template *sht);
992 extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
993 extern int ata_scsi_queuecmd(struct Scsi_Host *h, struct scsi_cmnd *cmd);
994 extern int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *dev,
995 int cmd, void __user *arg);
996 extern void ata_sas_port_destroy(struct ata_port *);
997 extern struct ata_port *ata_sas_port_alloc(struct ata_host *,
998 struct ata_port_info *, struct Scsi_Host *);
999 extern int ata_sas_port_init(struct ata_port *);
1000 extern int ata_sas_port_start(struct ata_port *ap);
1001 extern void ata_sas_port_stop(struct ata_port *ap);
1002 extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *);
1003 extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, struct ata_port *ap);
1004 extern int sata_scr_valid(struct ata_link *link);
1005 extern int sata_scr_read(struct ata_link *link, int reg, u32 *val);
1006 extern int sata_scr_write(struct ata_link *link, int reg, u32 val);
1007 extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val);
1008 extern bool ata_link_online(struct ata_link *link);
1009 extern bool ata_link_offline(struct ata_link *link);
1010 #ifdef CONFIG_PM
1011 extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg);
1012 extern void ata_host_resume(struct ata_host *host);
1013 #endif
1014 extern int ata_ratelimit(void);
1015 extern void ata_msleep(struct ata_port *ap, unsigned int msecs);
1016 extern u32 ata_wait_register(struct ata_port *ap, void __iomem *reg, u32 mask,
1017 u32 val, unsigned long interval, unsigned long timeout);
1018 extern int atapi_cmd_type(u8 opcode);
1019 extern void ata_tf_to_fis(const struct ata_taskfile *tf,
1020 u8 pmp, int is_cmd, u8 *fis);
1021 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
1022 extern unsigned long ata_pack_xfermask(unsigned long pio_mask,
1023 unsigned long mwdma_mask, unsigned long udma_mask);
1024 extern void ata_unpack_xfermask(unsigned long xfer_mask,
1025 unsigned long *pio_mask, unsigned long *mwdma_mask,
1026 unsigned long *udma_mask);
1027 extern u8 ata_xfer_mask2mode(unsigned long xfer_mask);
1028 extern unsigned long ata_xfer_mode2mask(u8 xfer_mode);
1029 extern int ata_xfer_mode2shift(unsigned long xfer_mode);
1030 extern const char *ata_mode_string(unsigned long xfer_mask);
1031 extern unsigned long ata_id_xfermask(const u16 *id);
1032 extern int ata_std_qc_defer(struct ata_queued_cmd *qc);
1033 extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
1034 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
1035 unsigned int n_elem);
1036 extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
1037 extern void ata_dev_disable(struct ata_device *adev);
1038 extern void ata_id_string(const u16 *id, unsigned char *s,
1039 unsigned int ofs, unsigned int len);
1040 extern void ata_id_c_string(const u16 *id, unsigned char *s,
1041 unsigned int ofs, unsigned int len);
1042 extern unsigned int ata_do_dev_read_id(struct ata_device *dev,
1043 struct ata_taskfile *tf, u16 *id);
1044 extern void ata_qc_complete(struct ata_queued_cmd *qc);
1045 extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active);
1046 extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd);
1047 extern int ata_std_bios_param(struct scsi_device *sdev,
1048 struct block_device *bdev,
1049 sector_t capacity, int geom[]);
1050 extern void ata_scsi_unlock_native_capacity(struct scsi_device *sdev);
1051 extern int ata_scsi_slave_config(struct scsi_device *sdev);
1052 extern void ata_scsi_slave_destroy(struct scsi_device *sdev);
1053 extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
1054 int queue_depth, int reason);
1055 extern int __ata_change_queue_depth(struct ata_port *ap, struct scsi_device *sdev,
1056 int queue_depth, int reason);
1057 extern struct ata_device *ata_dev_pair(struct ata_device *adev);
1058 extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev);
1059 extern void ata_scsi_port_error_handler(struct Scsi_Host *host, struct ata_port *ap);
1060 extern void ata_scsi_cmd_error_handler(struct Scsi_Host *host, struct ata_port *ap, struct list_head *eh_q);
1061
1062 extern int ata_cable_40wire(struct ata_port *ap);
1063 extern int ata_cable_80wire(struct ata_port *ap);
1064 extern int ata_cable_sata(struct ata_port *ap);
1065 extern int ata_cable_ignore(struct ata_port *ap);
1066 extern int ata_cable_unknown(struct ata_port *ap);
1067
1068 /* Timing helpers */
1069 extern unsigned int ata_pio_need_iordy(const struct ata_device *);
1070 extern const struct ata_timing *ata_timing_find_mode(u8 xfer_mode);
1071 extern int ata_timing_compute(struct ata_device *, unsigned short,
1072 struct ata_timing *, int, int);
1073 extern void ata_timing_merge(const struct ata_timing *,
1074 const struct ata_timing *, struct ata_timing *,
1075 unsigned int);
1076 extern u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle);
1077
1078 /* PCI */
1079 #ifdef CONFIG_PCI
1080 struct pci_dev;
1081
1082 struct pci_bits {
1083 unsigned int reg; /* PCI config register to read */
1084 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
1085 unsigned long mask;
1086 unsigned long val;
1087 };
1088
1089 extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
1090 extern void ata_pci_remove_one(struct pci_dev *pdev);
1091
1092 #ifdef CONFIG_PM
1093 extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg);
1094 extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev);
1095 extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
1096 extern int ata_pci_device_resume(struct pci_dev *pdev);
1097 #endif /* CONFIG_PM */
1098 #endif /* CONFIG_PCI */
1099
1100 /*
1101 * ACPI - drivers/ata/libata-acpi.c
1102 */
1103 #ifdef CONFIG_ATA_ACPI
1104 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
1105 {
1106 if (ap->pflags & ATA_PFLAG_INIT_GTM_VALID)
1107 return &ap->__acpi_init_gtm;
1108 return NULL;
1109 }
1110 int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm);
1111 int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *stm);
1112 unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev,
1113 const struct ata_acpi_gtm *gtm);
1114 int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm);
1115 #else
1116 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
1117 {
1118 return NULL;
1119 }
1120
1121 static inline int ata_acpi_stm(const struct ata_port *ap,
1122 struct ata_acpi_gtm *stm)
1123 {
1124 return -ENOSYS;
1125 }
1126
1127 static inline int ata_acpi_gtm(const struct ata_port *ap,
1128 struct ata_acpi_gtm *stm)
1129 {
1130 return -ENOSYS;
1131 }
1132
1133 static inline unsigned int ata_acpi_gtm_xfermask(struct ata_device *dev,
1134 const struct ata_acpi_gtm *gtm)
1135 {
1136 return 0;
1137 }
1138
1139 static inline int ata_acpi_cbl_80wire(struct ata_port *ap,
1140 const struct ata_acpi_gtm *gtm)
1141 {
1142 return 0;
1143 }
1144 #endif
1145
1146 /*
1147 * EH - drivers/ata/libata-eh.c
1148 */
1149 extern void ata_port_schedule_eh(struct ata_port *ap);
1150 extern int ata_link_abort(struct ata_link *link);
1151 extern int ata_port_abort(struct ata_port *ap);
1152 extern int ata_port_freeze(struct ata_port *ap);
1153 extern int sata_async_notification(struct ata_port *ap);
1154
1155 extern void ata_eh_freeze_port(struct ata_port *ap);
1156 extern void ata_eh_thaw_port(struct ata_port *ap);
1157
1158 extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
1159 extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
1160 extern void ata_eh_analyze_ncq_error(struct ata_link *link);
1161
1162 extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
1163 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
1164 ata_postreset_fn_t postreset);
1165 extern void ata_std_error_handler(struct ata_port *ap);
1166 extern int ata_link_nr_enabled(struct ata_link *link);
1167
1168 /*
1169 * Base operations to inherit from and initializers for sht
1170 *
1171 * Operations
1172 *
1173 * base : Common to all libata drivers.
1174 * sata : SATA controllers w/ native interface.
1175 * pmp : SATA controllers w/ PMP support.
1176 * sff : SFF ATA controllers w/o BMDMA support.
1177 * bmdma : SFF ATA controllers w/ BMDMA support.
1178 *
1179 * sht initializers
1180 *
1181 * BASE : Common to all libata drivers. The user must set
1182 * sg_tablesize and dma_boundary.
1183 * PIO : SFF ATA controllers w/ only PIO support.
1184 * BMDMA : SFF ATA controllers w/ BMDMA support. sg_tablesize and
1185 * dma_boundary are set to BMDMA limits.
1186 * NCQ : SATA controllers supporting NCQ. The user must set
1187 * sg_tablesize, dma_boundary and can_queue.
1188 */
1189 extern const struct ata_port_operations ata_base_port_ops;
1190 extern const struct ata_port_operations sata_port_ops;
1191 extern struct device_attribute *ata_common_sdev_attrs[];
1192
1193 #define ATA_BASE_SHT(drv_name) \
1194 .module = THIS_MODULE, \
1195 .name = drv_name, \
1196 .ioctl = ata_scsi_ioctl, \
1197 .queuecommand = ata_scsi_queuecmd, \
1198 .can_queue = ATA_DEF_QUEUE, \
1199 .this_id = ATA_SHT_THIS_ID, \
1200 .cmd_per_lun = ATA_SHT_CMD_PER_LUN, \
1201 .emulated = ATA_SHT_EMULATED, \
1202 .use_clustering = ATA_SHT_USE_CLUSTERING, \
1203 .proc_name = drv_name, \
1204 .slave_configure = ata_scsi_slave_config, \
1205 .slave_destroy = ata_scsi_slave_destroy, \
1206 .bios_param = ata_std_bios_param, \
1207 .unlock_native_capacity = ata_scsi_unlock_native_capacity, \
1208 .sdev_attrs = ata_common_sdev_attrs
1209
1210 #define ATA_NCQ_SHT(drv_name) \
1211 ATA_BASE_SHT(drv_name), \
1212 .change_queue_depth = ata_scsi_change_queue_depth
1213
1214 /*
1215 * PMP helpers
1216 */
1217 #ifdef CONFIG_SATA_PMP
1218 static inline bool sata_pmp_supported(struct ata_port *ap)
1219 {
1220 return ap->flags & ATA_FLAG_PMP;
1221 }
1222
1223 static inline bool sata_pmp_attached(struct ata_port *ap)
1224 {
1225 return ap->nr_pmp_links != 0;
1226 }
1227
1228 static inline int ata_is_host_link(const struct ata_link *link)
1229 {
1230 return link == &link->ap->link || link == link->ap->slave_link;
1231 }
1232 #else /* CONFIG_SATA_PMP */
1233 static inline bool sata_pmp_supported(struct ata_port *ap)
1234 {
1235 return false;
1236 }
1237
1238 static inline bool sata_pmp_attached(struct ata_port *ap)
1239 {
1240 return false;
1241 }
1242
1243 static inline int ata_is_host_link(const struct ata_link *link)
1244 {
1245 return 1;
1246 }
1247 #endif /* CONFIG_SATA_PMP */
1248
1249 static inline int sata_srst_pmp(struct ata_link *link)
1250 {
1251 if (sata_pmp_supported(link->ap) && ata_is_host_link(link))
1252 return SATA_PMP_CTRL_PORT;
1253 return link->pmp;
1254 }
1255
1256 /*
1257 * printk helpers
1258 */
1259 __printf(3, 4)
1260 int ata_port_printk(const struct ata_port *ap, const char *level,
1261 const char *fmt, ...);
1262 __printf(3, 4)
1263 int ata_link_printk(const struct ata_link *link, const char *level,
1264 const char *fmt, ...);
1265 __printf(3, 4)
1266 int ata_dev_printk(const struct ata_device *dev, const char *level,
1267 const char *fmt, ...);
1268
1269 #define ata_port_err(ap, fmt, ...) \
1270 ata_port_printk(ap, KERN_ERR, fmt, ##__VA_ARGS__)
1271 #define ata_port_warn(ap, fmt, ...) \
1272 ata_port_printk(ap, KERN_WARNING, fmt, ##__VA_ARGS__)
1273 #define ata_port_notice(ap, fmt, ...) \
1274 ata_port_printk(ap, KERN_NOTICE, fmt, ##__VA_ARGS__)
1275 #define ata_port_info(ap, fmt, ...) \
1276 ata_port_printk(ap, KERN_INFO, fmt, ##__VA_ARGS__)
1277 #define ata_port_dbg(ap, fmt, ...) \
1278 ata_port_printk(ap, KERN_DEBUG, fmt, ##__VA_ARGS__)
1279
1280 #define ata_link_err(link, fmt, ...) \
1281 ata_link_printk(link, KERN_ERR, fmt, ##__VA_ARGS__)
1282 #define ata_link_warn(link, fmt, ...) \
1283 ata_link_printk(link, KERN_WARNING, fmt, ##__VA_ARGS__)
1284 #define ata_link_notice(link, fmt, ...) \
1285 ata_link_printk(link, KERN_NOTICE, fmt, ##__VA_ARGS__)
1286 #define ata_link_info(link, fmt, ...) \
1287 ata_link_printk(link, KERN_INFO, fmt, ##__VA_ARGS__)
1288 #define ata_link_dbg(link, fmt, ...) \
1289 ata_link_printk(link, KERN_DEBUG, fmt, ##__VA_ARGS__)
1290
1291 #define ata_dev_err(dev, fmt, ...) \
1292 ata_dev_printk(dev, KERN_ERR, fmt, ##__VA_ARGS__)
1293 #define ata_dev_warn(dev, fmt, ...) \
1294 ata_dev_printk(dev, KERN_WARNING, fmt, ##__VA_ARGS__)
1295 #define ata_dev_notice(dev, fmt, ...) \
1296 ata_dev_printk(dev, KERN_NOTICE, fmt, ##__VA_ARGS__)
1297 #define ata_dev_info(dev, fmt, ...) \
1298 ata_dev_printk(dev, KERN_INFO, fmt, ##__VA_ARGS__)
1299 #define ata_dev_dbg(dev, fmt, ...) \
1300 ata_dev_printk(dev, KERN_DEBUG, fmt, ##__VA_ARGS__)
1301
1302 void ata_print_version(const struct device *dev, const char *version);
1303
1304 /*
1305 * ata_eh_info helpers
1306 */
1307 extern __printf(2, 3)
1308 void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...);
1309 extern __printf(2, 3)
1310 void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...);
1311 extern void ata_ehi_clear_desc(struct ata_eh_info *ehi);
1312
1313 static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
1314 {
1315 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
1316 ehi->flags |= ATA_EHI_HOTPLUGGED;
1317 ehi->action |= ATA_EH_RESET | ATA_EH_ENABLE_LINK;
1318 ehi->err_mask |= AC_ERR_ATA_BUS;
1319 }
1320
1321 /*
1322 * port description helpers
1323 */
1324 extern __printf(2, 3)
1325 void ata_port_desc(struct ata_port *ap, const char *fmt, ...);
1326 #ifdef CONFIG_PCI
1327 extern void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset,
1328 const char *name);
1329 #endif
1330
1331 static inline unsigned int ata_tag_valid(unsigned int tag)
1332 {
1333 return (tag < ATA_MAX_QUEUE) ? 1 : 0;
1334 }
1335
1336 static inline unsigned int ata_tag_internal(unsigned int tag)
1337 {
1338 return tag == ATA_TAG_INTERNAL;
1339 }
1340
1341 /*
1342 * device helpers
1343 */
1344 static inline unsigned int ata_class_enabled(unsigned int class)
1345 {
1346 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI ||
1347 class == ATA_DEV_PMP || class == ATA_DEV_SEMB;
1348 }
1349
1350 static inline unsigned int ata_class_disabled(unsigned int class)
1351 {
1352 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP ||
1353 class == ATA_DEV_PMP_UNSUP || class == ATA_DEV_SEMB_UNSUP;
1354 }
1355
1356 static inline unsigned int ata_class_absent(unsigned int class)
1357 {
1358 return !ata_class_enabled(class) && !ata_class_disabled(class);
1359 }
1360
1361 static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
1362 {
1363 return ata_class_enabled(dev->class);
1364 }
1365
1366 static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
1367 {
1368 return ata_class_disabled(dev->class);
1369 }
1370
1371 static inline unsigned int ata_dev_absent(const struct ata_device *dev)
1372 {
1373 return ata_class_absent(dev->class);
1374 }
1375
1376 /*
1377 * link helpers
1378 */
1379 static inline int ata_link_max_devices(const struct ata_link *link)
1380 {
1381 if (ata_is_host_link(link) && link->ap->flags & ATA_FLAG_SLAVE_POSS)
1382 return 2;
1383 return 1;
1384 }
1385
1386 static inline int ata_link_active(struct ata_link *link)
1387 {
1388 return ata_tag_valid(link->active_tag) || link->sactive;
1389 }
1390
1391 /*
1392 * Iterators
1393 *
1394 * ATA_LITER_* constants are used to select link iteration mode and
1395 * ATA_DITER_* device iteration mode.
1396 *
1397 * For a custom iteration directly using ata_{link|dev}_next(), if
1398 * @link or @dev, respectively, is NULL, the first element is
1399 * returned. @dev and @link can be any valid device or link and the
1400 * next element according to the iteration mode will be returned.
1401 * After the last element, NULL is returned.
1402 */
1403 enum ata_link_iter_mode {
1404 ATA_LITER_EDGE, /* if present, PMP links only; otherwise,
1405 * host link. no slave link */
1406 ATA_LITER_HOST_FIRST, /* host link followed by PMP or slave links */
1407 ATA_LITER_PMP_FIRST, /* PMP links followed by host link,
1408 * slave link still comes after host link */
1409 };
1410
1411 enum ata_dev_iter_mode {
1412 ATA_DITER_ENABLED,
1413 ATA_DITER_ENABLED_REVERSE,
1414 ATA_DITER_ALL,
1415 ATA_DITER_ALL_REVERSE,
1416 };
1417
1418 extern struct ata_link *ata_link_next(struct ata_link *link,
1419 struct ata_port *ap,
1420 enum ata_link_iter_mode mode);
1421
1422 extern struct ata_device *ata_dev_next(struct ata_device *dev,
1423 struct ata_link *link,
1424 enum ata_dev_iter_mode mode);
1425
1426 /*
1427 * Shortcut notation for iterations
1428 *
1429 * ata_for_each_link() iterates over each link of @ap according to
1430 * @mode. @link points to the current link in the loop. @link is
1431 * NULL after loop termination. ata_for_each_dev() works the same way
1432 * except that it iterates over each device of @link.
1433 *
1434 * Note that the mode prefixes ATA_{L|D}ITER_ shouldn't need to be
1435 * specified when using the following shorthand notations. Only the
1436 * mode itself (EDGE, HOST_FIRST, ENABLED, etc...) should be
1437 * specified. This not only increases brevity but also makes it
1438 * impossible to use ATA_LITER_* for device iteration or vice-versa.
1439 */
1440 #define ata_for_each_link(link, ap, mode) \
1441 for ((link) = ata_link_next(NULL, (ap), ATA_LITER_##mode); (link); \
1442 (link) = ata_link_next((link), (ap), ATA_LITER_##mode))
1443
1444 #define ata_for_each_dev(dev, link, mode) \
1445 for ((dev) = ata_dev_next(NULL, (link), ATA_DITER_##mode); (dev); \
1446 (dev) = ata_dev_next((dev), (link), ATA_DITER_##mode))
1447
1448 /**
1449 * ata_ncq_enabled - Test whether NCQ is enabled
1450 * @dev: ATA device to test for
1451 *
1452 * LOCKING:
1453 * spin_lock_irqsave(host lock)
1454 *
1455 * RETURNS:
1456 * 1 if NCQ is enabled for @dev, 0 otherwise.
1457 */
1458 static inline int ata_ncq_enabled(struct ata_device *dev)
1459 {
1460 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF |
1461 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ;
1462 }
1463
1464 static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
1465 {
1466 qc->tf.ctl |= ATA_NIEN;
1467 }
1468
1469 static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap,
1470 unsigned int tag)
1471 {
1472 if (likely(ata_tag_valid(tag)))
1473 return &ap->qcmd[tag];
1474 return NULL;
1475 }
1476
1477 static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap,
1478 unsigned int tag)
1479 {
1480 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
1481
1482 if (unlikely(!qc) || !ap->ops->error_handler)
1483 return qc;
1484
1485 if ((qc->flags & (ATA_QCFLAG_ACTIVE |
1486 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE)
1487 return qc;
1488
1489 return NULL;
1490 }
1491
1492 static inline unsigned int ata_qc_raw_nbytes(struct ata_queued_cmd *qc)
1493 {
1494 return qc->nbytes - min(qc->extrabytes, qc->nbytes);
1495 }
1496
1497 static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
1498 {
1499 memset(tf, 0, sizeof(*tf));
1500
1501 #ifdef CONFIG_ATA_SFF
1502 tf->ctl = dev->link->ap->ctl;
1503 #else
1504 tf->ctl = ATA_DEVCTL_OBS;
1505 #endif
1506 if (dev->devno == 0)
1507 tf->device = ATA_DEVICE_OBS;
1508 else
1509 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
1510 }
1511
1512 static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
1513 {
1514 qc->dma_dir = DMA_NONE;
1515 qc->sg = NULL;
1516 qc->flags = 0;
1517 qc->cursg = NULL;
1518 qc->cursg_ofs = 0;
1519 qc->nbytes = qc->extrabytes = qc->curbytes = 0;
1520 qc->n_elem = 0;
1521 qc->err_mask = 0;
1522 qc->sect_size = ATA_SECT_SIZE;
1523
1524 ata_tf_init(qc->dev, &qc->tf);
1525
1526 /* init result_tf such that it indicates normal completion */
1527 qc->result_tf.command = ATA_DRDY;
1528 qc->result_tf.feature = 0;
1529 }
1530
1531 static inline int ata_try_flush_cache(const struct ata_device *dev)
1532 {
1533 return ata_id_wcache_enabled(dev->id) ||
1534 ata_id_has_flush(dev->id) ||
1535 ata_id_has_flush_ext(dev->id);
1536 }
1537
1538 static inline unsigned int ac_err_mask(u8 status)
1539 {
1540 if (status & (ATA_BUSY | ATA_DRQ))
1541 return AC_ERR_HSM;
1542 if (status & (ATA_ERR | ATA_DF))
1543 return AC_ERR_DEV;
1544 return 0;
1545 }
1546
1547 static inline unsigned int __ac_err_mask(u8 status)
1548 {
1549 unsigned int mask = ac_err_mask(status);
1550 if (mask == 0)
1551 return AC_ERR_OTHER;
1552 return mask;
1553 }
1554
1555 static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
1556 {
1557 return *(struct ata_port **)&host->hostdata[0];
1558 }
1559
1560 static inline int ata_check_ready(u8 status)
1561 {
1562 if (!(status & ATA_BUSY))
1563 return 1;
1564
1565 /* 0xff indicates either no device or device not ready */
1566 if (status == 0xff)
1567 return -ENODEV;
1568
1569 return 0;
1570 }
1571
1572 static inline unsigned long ata_deadline(unsigned long from_jiffies,
1573 unsigned long timeout_msecs)
1574 {
1575 return from_jiffies + msecs_to_jiffies(timeout_msecs);
1576 }
1577
1578 /* Don't open code these in drivers as there are traps. Firstly the range may
1579 change in future hardware and specs, secondly 0xFF means 'no DMA' but is
1580 > UDMA_0. Dyma ddreigiau */
1581
1582 static inline int ata_using_mwdma(struct ata_device *adev)
1583 {
1584 if (adev->dma_mode >= XFER_MW_DMA_0 && adev->dma_mode <= XFER_MW_DMA_4)
1585 return 1;
1586 return 0;
1587 }
1588
1589 static inline int ata_using_udma(struct ata_device *adev)
1590 {
1591 if (adev->dma_mode >= XFER_UDMA_0 && adev->dma_mode <= XFER_UDMA_7)
1592 return 1;
1593 return 0;
1594 }
1595
1596 static inline int ata_dma_enabled(struct ata_device *adev)
1597 {
1598 return (adev->dma_mode == 0xFF ? 0 : 1);
1599 }
1600
1601 /**************************************************************************
1602 * PMP - drivers/ata/libata-pmp.c
1603 */
1604 #ifdef CONFIG_SATA_PMP
1605
1606 extern const struct ata_port_operations sata_pmp_port_ops;
1607
1608 extern int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc);
1609 extern void sata_pmp_error_handler(struct ata_port *ap);
1610
1611 #else /* CONFIG_SATA_PMP */
1612
1613 #define sata_pmp_port_ops sata_port_ops
1614 #define sata_pmp_qc_defer_cmd_switch ata_std_qc_defer
1615 #define sata_pmp_error_handler ata_std_error_handler
1616
1617 #endif /* CONFIG_SATA_PMP */
1618
1619
1620 /**************************************************************************
1621 * SFF - drivers/ata/libata-sff.c
1622 */
1623 #ifdef CONFIG_ATA_SFF
1624
1625 extern const struct ata_port_operations ata_sff_port_ops;
1626 extern const struct ata_port_operations ata_bmdma32_port_ops;
1627
1628 /* PIO only, sg_tablesize and dma_boundary limits can be removed */
1629 #define ATA_PIO_SHT(drv_name) \
1630 ATA_BASE_SHT(drv_name), \
1631 .sg_tablesize = LIBATA_MAX_PRD, \
1632 .dma_boundary = ATA_DMA_BOUNDARY
1633
1634 extern void ata_sff_dev_select(struct ata_port *ap, unsigned int device);
1635 extern u8 ata_sff_check_status(struct ata_port *ap);
1636 extern void ata_sff_pause(struct ata_port *ap);
1637 extern void ata_sff_dma_pause(struct ata_port *ap);
1638 extern int ata_sff_busy_sleep(struct ata_port *ap,
1639 unsigned long timeout_pat, unsigned long timeout);
1640 extern int ata_sff_wait_ready(struct ata_link *link, unsigned long deadline);
1641 extern void ata_sff_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
1642 extern void ata_sff_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
1643 extern void ata_sff_exec_command(struct ata_port *ap,
1644 const struct ata_taskfile *tf);
1645 extern unsigned int ata_sff_data_xfer(struct ata_device *dev,
1646 unsigned char *buf, unsigned int buflen, int rw);
1647 extern unsigned int ata_sff_data_xfer32(struct ata_device *dev,
1648 unsigned char *buf, unsigned int buflen, int rw);
1649 extern unsigned int ata_sff_data_xfer_noirq(struct ata_device *dev,
1650 unsigned char *buf, unsigned int buflen, int rw);
1651 extern void ata_sff_irq_on(struct ata_port *ap);
1652 extern void ata_sff_irq_clear(struct ata_port *ap);
1653 extern int ata_sff_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
1654 u8 status, int in_wq);
1655 extern void ata_sff_queue_work(struct work_struct *work);
1656 extern void ata_sff_queue_delayed_work(struct delayed_work *dwork,
1657 unsigned long delay);
1658 extern void ata_sff_queue_pio_task(struct ata_link *link, unsigned long delay);
1659 extern unsigned int ata_sff_qc_issue(struct ata_queued_cmd *qc);
1660 extern bool ata_sff_qc_fill_rtf(struct ata_queued_cmd *qc);
1661 extern unsigned int ata_sff_port_intr(struct ata_port *ap,
1662 struct ata_queued_cmd *qc);
1663 extern irqreturn_t ata_sff_interrupt(int irq, void *dev_instance);
1664 extern void ata_sff_lost_interrupt(struct ata_port *ap);
1665 extern void ata_sff_freeze(struct ata_port *ap);
1666 extern void ata_sff_thaw(struct ata_port *ap);
1667 extern int ata_sff_prereset(struct ata_link *link, unsigned long deadline);
1668 extern unsigned int ata_sff_dev_classify(struct ata_device *dev, int present,
1669 u8 *r_err);
1670 extern int ata_sff_wait_after_reset(struct ata_link *link, unsigned int devmask,
1671 unsigned long deadline);
1672 extern int ata_sff_softreset(struct ata_link *link, unsigned int *classes,
1673 unsigned long deadline);
1674 extern int sata_sff_hardreset(struct ata_link *link, unsigned int *class,
1675 unsigned long deadline);
1676 extern void ata_sff_postreset(struct ata_link *link, unsigned int *classes);
1677 extern void ata_sff_drain_fifo(struct ata_queued_cmd *qc);
1678 extern void ata_sff_error_handler(struct ata_port *ap);
1679 extern void ata_sff_std_ports(struct ata_ioports *ioaddr);
1680 #ifdef CONFIG_PCI
1681 extern int ata_pci_sff_init_host(struct ata_host *host);
1682 extern int ata_pci_sff_prepare_host(struct pci_dev *pdev,
1683 const struct ata_port_info * const * ppi,
1684 struct ata_host **r_host);
1685 extern int ata_pci_sff_activate_host(struct ata_host *host,
1686 irq_handler_t irq_handler,
1687 struct scsi_host_template *sht);
1688 extern int ata_pci_sff_init_one(struct pci_dev *pdev,
1689 const struct ata_port_info * const * ppi,
1690 struct scsi_host_template *sht, void *host_priv, int hflags);
1691 #endif /* CONFIG_PCI */
1692
1693 #ifdef CONFIG_ATA_BMDMA
1694
1695 extern const struct ata_port_operations ata_bmdma_port_ops;
1696
1697 #define ATA_BMDMA_SHT(drv_name) \
1698 ATA_BASE_SHT(drv_name), \
1699 .sg_tablesize = LIBATA_MAX_PRD, \
1700 .dma_boundary = ATA_DMA_BOUNDARY
1701
1702 extern void ata_bmdma_qc_prep(struct ata_queued_cmd *qc);
1703 extern unsigned int ata_bmdma_qc_issue(struct ata_queued_cmd *qc);
1704 extern void ata_bmdma_dumb_qc_prep(struct ata_queued_cmd *qc);
1705 extern unsigned int ata_bmdma_port_intr(struct ata_port *ap,
1706 struct ata_queued_cmd *qc);
1707 extern irqreturn_t ata_bmdma_interrupt(int irq, void *dev_instance);
1708 extern void ata_bmdma_error_handler(struct ata_port *ap);
1709 extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc);
1710 extern void ata_bmdma_irq_clear(struct ata_port *ap);
1711 extern void ata_bmdma_setup(struct ata_queued_cmd *qc);
1712 extern void ata_bmdma_start(struct ata_queued_cmd *qc);
1713 extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
1714 extern u8 ata_bmdma_status(struct ata_port *ap);
1715 extern int ata_bmdma_port_start(struct ata_port *ap);
1716 extern int ata_bmdma_port_start32(struct ata_port *ap);
1717
1718 #ifdef CONFIG_PCI
1719 extern int ata_pci_bmdma_clear_simplex(struct pci_dev *pdev);
1720 extern void ata_pci_bmdma_init(struct ata_host *host);
1721 extern int ata_pci_bmdma_prepare_host(struct pci_dev *pdev,
1722 const struct ata_port_info * const * ppi,
1723 struct ata_host **r_host);
1724 extern int ata_pci_bmdma_init_one(struct pci_dev *pdev,
1725 const struct ata_port_info * const * ppi,
1726 struct scsi_host_template *sht,
1727 void *host_priv, int hflags);
1728 #endif /* CONFIG_PCI */
1729 #endif /* CONFIG_ATA_BMDMA */
1730
1731 /**
1732 * ata_sff_busy_wait - Wait for a port status register
1733 * @ap: Port to wait for.
1734 * @bits: bits that must be clear
1735 * @max: number of 10uS waits to perform
1736 *
1737 * Waits up to max*10 microseconds for the selected bits in the port's
1738 * status register to be cleared.
1739 * Returns final value of status register.
1740 *
1741 * LOCKING:
1742 * Inherited from caller.
1743 */
1744 static inline u8 ata_sff_busy_wait(struct ata_port *ap, unsigned int bits,
1745 unsigned int max)
1746 {
1747 u8 status;
1748
1749 do {
1750 udelay(10);
1751 status = ap->ops->sff_check_status(ap);
1752 max--;
1753 } while (status != 0xff && (status & bits) && (max > 0));
1754
1755 return status;
1756 }
1757
1758 /**
1759 * ata_wait_idle - Wait for a port to be idle.
1760 * @ap: Port to wait for.
1761 *
1762 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
1763 * Returns final value of status register.
1764 *
1765 * LOCKING:
1766 * Inherited from caller.
1767 */
1768 static inline u8 ata_wait_idle(struct ata_port *ap)
1769 {
1770 u8 status = ata_sff_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
1771
1772 #ifdef ATA_DEBUG
1773 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ)))
1774 ata_port_printk(ap, KERN_DEBUG, "abnormal Status 0x%X\n",
1775 status);
1776 #endif
1777
1778 return status;
1779 }
1780 #endif /* CONFIG_ATA_SFF */
1781
1782 #endif /* __LINUX_LIBATA_H__ */