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[libata] ahci: Add support for Enmotus Bobcat device.
[deliverable/linux.git] / include / linux / libata.h
1 /*
2 * Copyright 2003-2005 Red Hat, Inc. All rights reserved.
3 * Copyright 2003-2005 Jeff Garzik
4 *
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2, or (at your option)
9 * any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; see the file COPYING. If not, write to
18 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
19 *
20 *
21 * libata documentation is available via 'make {ps|pdf}docs',
22 * as Documentation/DocBook/libata.*
23 *
24 */
25
26 #ifndef __LINUX_LIBATA_H__
27 #define __LINUX_LIBATA_H__
28
29 #include <linux/delay.h>
30 #include <linux/jiffies.h>
31 #include <linux/interrupt.h>
32 #include <linux/dma-mapping.h>
33 #include <linux/scatterlist.h>
34 #include <linux/io.h>
35 #include <linux/ata.h>
36 #include <linux/workqueue.h>
37 #include <scsi/scsi_host.h>
38 #include <linux/acpi.h>
39 #include <linux/cdrom.h>
40 #include <linux/sched.h>
41
42 /*
43 * Define if arch has non-standard setup. This is a _PCI_ standard
44 * not a legacy or ISA standard.
45 */
46 #ifdef CONFIG_ATA_NONSTANDARD
47 #include <asm/libata-portmap.h>
48 #else
49 #include <asm-generic/libata-portmap.h>
50 #endif
51
52 /*
53 * compile-time options: to be removed as soon as all the drivers are
54 * converted to the new debugging mechanism
55 */
56 #undef ATA_DEBUG /* debugging output */
57 #undef ATA_VERBOSE_DEBUG /* yet more debugging output */
58 #undef ATA_IRQ_TRAP /* define to ack screaming irqs */
59 #undef ATA_NDEBUG /* define to disable quick runtime checks */
60
61
62 /* note: prints function name for you */
63 #ifdef ATA_DEBUG
64 #define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args)
65 #ifdef ATA_VERBOSE_DEBUG
66 #define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args)
67 #else
68 #define VPRINTK(fmt, args...)
69 #endif /* ATA_VERBOSE_DEBUG */
70 #else
71 #define DPRINTK(fmt, args...)
72 #define VPRINTK(fmt, args...)
73 #endif /* ATA_DEBUG */
74
75 #define BPRINTK(fmt, args...) if (ap->flags & ATA_FLAG_DEBUGMSG) printk(KERN_ERR "%s: " fmt, __func__, ## args)
76
77 #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
191 /* struct ata_port flags */
192 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */
193 /* (doesn't imply presence) */
194 ATA_FLAG_SATA = (1 << 1),
195 ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */
196 ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */
197 ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */
198 ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD
199 * doesn't handle PIO interrupts */
200 ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */
201 ATA_FLAG_NO_POWEROFF_SPINDOWN = (1 << 11), /* don't spindown before poweroff */
202 ATA_FLAG_NO_HIBERNATE_SPINDOWN = (1 << 12), /* don't spindown before hibernation */
203 ATA_FLAG_DEBUGMSG = (1 << 13),
204 ATA_FLAG_FPDMA_AA = (1 << 14), /* driver supports Auto-Activate */
205 ATA_FLAG_IGN_SIMPLEX = (1 << 15), /* ignore SIMPLEX */
206 ATA_FLAG_NO_IORDY = (1 << 16), /* controller lacks iordy */
207 ATA_FLAG_ACPI_SATA = (1 << 17), /* need native SATA ACPI layout */
208 ATA_FLAG_AN = (1 << 18), /* controller supports AN */
209 ATA_FLAG_PMP = (1 << 19), /* controller supports PMP */
210 ATA_FLAG_EM = (1 << 21), /* driver supports enclosure
211 * management */
212 ATA_FLAG_SW_ACTIVITY = (1 << 22), /* driver supports sw activity
213 * led */
214 ATA_FLAG_NO_DIPM = (1 << 23), /* host not happy with DIPM */
215
216 /* bits 24:31 of ap->flags are reserved for LLD specific flags */
217
218
219 /* struct ata_port pflags */
220 ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */
221 ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */
222 ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */
223 ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */
224 ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */
225 ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */
226 ATA_PFLAG_INITIALIZING = (1 << 7), /* being initialized, don't touch */
227 ATA_PFLAG_RESETTING = (1 << 8), /* reset in progress */
228 ATA_PFLAG_UNLOADING = (1 << 9), /* driver is being unloaded */
229 ATA_PFLAG_UNLOADED = (1 << 10), /* driver is unloaded */
230
231 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */
232 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */
233 ATA_PFLAG_INIT_GTM_VALID = (1 << 19), /* initial gtm data valid */
234
235 ATA_PFLAG_PIO32 = (1 << 20), /* 32bit PIO */
236 ATA_PFLAG_PIO32CHANGE = (1 << 21), /* 32bit PIO can be turned on/off */
237
238 /* struct ata_queued_cmd flags */
239 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */
240 ATA_QCFLAG_DMAMAP = (1 << 1), /* SG table is DMA mapped */
241 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */
242 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */
243 ATA_QCFLAG_CLEAR_EXCL = (1 << 5), /* clear excl_link on completion */
244 ATA_QCFLAG_QUIET = (1 << 6), /* don't report device error */
245 ATA_QCFLAG_RETRY = (1 << 7), /* retry after failure */
246
247 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */
248 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */
249 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */
250
251 /* host set flags */
252 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */
253 ATA_HOST_STARTED = (1 << 1), /* Host started */
254 ATA_HOST_PARALLEL_SCAN = (1 << 2), /* Ports on this host can be scanned in parallel */
255 ATA_HOST_IGNORE_ATA = (1 << 3), /* Ignore ATA devices on this host. */
256
257 /* bits 24:31 of host->flags are reserved for LLD specific flags */
258
259 /* various lengths of time */
260 ATA_TMOUT_BOOT = 30000, /* heuristic */
261 ATA_TMOUT_BOOT_QUICK = 7000, /* heuristic */
262 ATA_TMOUT_INTERNAL_QUICK = 5000,
263 ATA_TMOUT_MAX_PARK = 30000,
264
265 /*
266 * GoVault needs 2s and iVDR disk HHD424020F7SV00 800ms. 2s
267 * is too much without parallel probing. Use 2s if parallel
268 * probing is available, 800ms otherwise.
269 */
270 ATA_TMOUT_FF_WAIT_LONG = 2000,
271 ATA_TMOUT_FF_WAIT = 800,
272
273 /* Spec mandates to wait for ">= 2ms" before checking status
274 * after reset. We wait 150ms, because that was the magic
275 * delay used for ATAPI devices in Hale Landis's ATADRVR, for
276 * the period of time between when the ATA command register is
277 * written, and then status is checked. Because waiting for
278 * "a while" before checking status is fine, post SRST, we
279 * perform this magic delay here as well.
280 *
281 * Old drivers/ide uses the 2mS rule and then waits for ready.
282 */
283 ATA_WAIT_AFTER_RESET = 150,
284
285 /* If PMP is supported, we have to do follow-up SRST. As some
286 * PMPs don't send D2H Reg FIS after hardreset, LLDs are
287 * advised to wait only for the following duration before
288 * doing SRST.
289 */
290 ATA_TMOUT_PMP_SRST_WAIT = 5000,
291
292 /* ATA bus states */
293 BUS_UNKNOWN = 0,
294 BUS_DMA = 1,
295 BUS_IDLE = 2,
296 BUS_NOINTR = 3,
297 BUS_NODATA = 4,
298 BUS_TIMER = 5,
299 BUS_PIO = 6,
300 BUS_EDD = 7,
301 BUS_IDENTIFY = 8,
302 BUS_PACKET = 9,
303
304 /* SATA port states */
305 PORT_UNKNOWN = 0,
306 PORT_ENABLED = 1,
307 PORT_DISABLED = 2,
308
309 /* encoding various smaller bitmaps into a single
310 * unsigned long bitmap
311 */
312 ATA_NR_PIO_MODES = 7,
313 ATA_NR_MWDMA_MODES = 5,
314 ATA_NR_UDMA_MODES = 8,
315
316 ATA_SHIFT_PIO = 0,
317 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_NR_PIO_MODES,
318 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_NR_MWDMA_MODES,
319
320 /* size of buffer to pad xfers ending on unaligned boundaries */
321 ATA_DMA_PAD_SZ = 4,
322
323 /* ering size */
324 ATA_ERING_SIZE = 32,
325
326 /* return values for ->qc_defer */
327 ATA_DEFER_LINK = 1,
328 ATA_DEFER_PORT = 2,
329
330 /* desc_len for ata_eh_info and context */
331 ATA_EH_DESC_LEN = 80,
332
333 /* reset / recovery action types */
334 ATA_EH_REVALIDATE = (1 << 0),
335 ATA_EH_SOFTRESET = (1 << 1), /* meaningful only in ->prereset */
336 ATA_EH_HARDRESET = (1 << 2), /* meaningful only in ->prereset */
337 ATA_EH_RESET = ATA_EH_SOFTRESET | ATA_EH_HARDRESET,
338 ATA_EH_ENABLE_LINK = (1 << 3),
339 ATA_EH_PARK = (1 << 5), /* unload heads and stop I/O */
340
341 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE | ATA_EH_PARK,
342 ATA_EH_ALL_ACTIONS = ATA_EH_REVALIDATE | ATA_EH_RESET |
343 ATA_EH_ENABLE_LINK,
344
345 /* ata_eh_info->flags */
346 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */
347 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */
348 ATA_EHI_QUIET = (1 << 3), /* be quiet */
349 ATA_EHI_NO_RECOVERY = (1 << 4), /* no recovery */
350
351 ATA_EHI_DID_SOFTRESET = (1 << 16), /* already soft-reset this port */
352 ATA_EHI_DID_HARDRESET = (1 << 17), /* already soft-reset this port */
353 ATA_EHI_PRINTINFO = (1 << 18), /* print configuration info */
354 ATA_EHI_SETMODE = (1 << 19), /* configure transfer mode */
355 ATA_EHI_POST_SETMODE = (1 << 20), /* revalidating after setmode */
356
357 ATA_EHI_DID_RESET = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET,
358
359 /* mask of flags to transfer *to* the slave link */
360 ATA_EHI_TO_SLAVE_MASK = ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET,
361
362 /* max tries if error condition is still set after ->error_handler */
363 ATA_EH_MAX_TRIES = 5,
364
365 /* sometimes resuming a link requires several retries */
366 ATA_LINK_RESUME_TRIES = 5,
367
368 /* how hard are we gonna try to probe/recover devices */
369 ATA_PROBE_MAX_TRIES = 3,
370 ATA_EH_DEV_TRIES = 3,
371 ATA_EH_PMP_TRIES = 5,
372 ATA_EH_PMP_LINK_TRIES = 3,
373
374 SATA_PMP_RW_TIMEOUT = 3000, /* PMP read/write timeout */
375
376 /* This should match the actual table size of
377 * ata_eh_cmd_timeout_table in libata-eh.c.
378 */
379 ATA_EH_CMD_TIMEOUT_TABLE_SIZE = 6,
380
381 /* Horkage types. May be set by libata or controller on drives
382 (some horkage may be drive/controller pair dependent */
383
384 ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */
385 ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */
386 ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */
387 ATA_HORKAGE_MAX_SEC_128 = (1 << 3), /* Limit max sects to 128 */
388 ATA_HORKAGE_BROKEN_HPA = (1 << 4), /* Broken HPA */
389 ATA_HORKAGE_DISABLE = (1 << 5), /* Disable it */
390 ATA_HORKAGE_HPA_SIZE = (1 << 6), /* native size off by one */
391 ATA_HORKAGE_IVB = (1 << 8), /* cbl det validity bit bugs */
392 ATA_HORKAGE_STUCK_ERR = (1 << 9), /* stuck ERR on next PACKET */
393 ATA_HORKAGE_BRIDGE_OK = (1 << 10), /* no bridge limits */
394 ATA_HORKAGE_ATAPI_MOD16_DMA = (1 << 11), /* use ATAPI DMA for commands
395 not multiple of 16 bytes */
396 ATA_HORKAGE_FIRMWARE_WARN = (1 << 12), /* firmware update warning */
397 ATA_HORKAGE_1_5_GBPS = (1 << 13), /* force 1.5 Gbps */
398 ATA_HORKAGE_NOSETXFER = (1 << 14), /* skip SETXFER, SATA only */
399 ATA_HORKAGE_BROKEN_FPDMA_AA = (1 << 15), /* skip AA */
400 ATA_HORKAGE_DUMP_ID = (1 << 16), /* dump IDENTIFY data */
401
402 /* DMA mask for user DMA control: User visible values; DO NOT
403 renumber */
404 ATA_DMA_MASK_ATA = (1 << 0), /* DMA on ATA Disk */
405 ATA_DMA_MASK_ATAPI = (1 << 1), /* DMA on ATAPI */
406 ATA_DMA_MASK_CFA = (1 << 2), /* DMA on CF Card */
407
408 /* ATAPI command types */
409 ATAPI_READ = 0, /* READs */
410 ATAPI_WRITE = 1, /* WRITEs */
411 ATAPI_READ_CD = 2, /* READ CD [MSF] */
412 ATAPI_PASS_THRU = 3, /* SAT pass-thru */
413 ATAPI_MISC = 4, /* the rest */
414
415 /* Timing constants */
416 ATA_TIMING_SETUP = (1 << 0),
417 ATA_TIMING_ACT8B = (1 << 1),
418 ATA_TIMING_REC8B = (1 << 2),
419 ATA_TIMING_CYC8B = (1 << 3),
420 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
421 ATA_TIMING_CYC8B,
422 ATA_TIMING_ACTIVE = (1 << 4),
423 ATA_TIMING_RECOVER = (1 << 5),
424 ATA_TIMING_DMACK_HOLD = (1 << 6),
425 ATA_TIMING_CYCLE = (1 << 7),
426 ATA_TIMING_UDMA = (1 << 8),
427 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
428 ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
429 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
430 ATA_TIMING_DMACK_HOLD | ATA_TIMING_CYCLE |
431 ATA_TIMING_UDMA,
432
433 /* ACPI constants */
434 ATA_ACPI_FILTER_SETXFER = 1 << 0,
435 ATA_ACPI_FILTER_LOCK = 1 << 1,
436 ATA_ACPI_FILTER_DIPM = 1 << 2,
437 ATA_ACPI_FILTER_FPDMA_OFFSET = 1 << 3, /* FPDMA non-zero offset */
438 ATA_ACPI_FILTER_FPDMA_AA = 1 << 4, /* FPDMA auto activate */
439
440 ATA_ACPI_FILTER_DEFAULT = ATA_ACPI_FILTER_SETXFER |
441 ATA_ACPI_FILTER_LOCK |
442 ATA_ACPI_FILTER_DIPM,
443 };
444
445 enum ata_xfer_mask {
446 ATA_MASK_PIO = ((1LU << ATA_NR_PIO_MODES) - 1)
447 << ATA_SHIFT_PIO,
448 ATA_MASK_MWDMA = ((1LU << ATA_NR_MWDMA_MODES) - 1)
449 << ATA_SHIFT_MWDMA,
450 ATA_MASK_UDMA = ((1LU << ATA_NR_UDMA_MODES) - 1)
451 << ATA_SHIFT_UDMA,
452 };
453
454 enum hsm_task_states {
455 HSM_ST_IDLE, /* no command on going */
456 HSM_ST_FIRST, /* (waiting the device to)
457 write CDB or first data block */
458 HSM_ST, /* (waiting the device to) transfer data */
459 HSM_ST_LAST, /* (waiting the device to) complete command */
460 HSM_ST_ERR, /* error */
461 };
462
463 enum ata_completion_errors {
464 AC_ERR_DEV = (1 << 0), /* device reported error */
465 AC_ERR_HSM = (1 << 1), /* host state machine violation */
466 AC_ERR_TIMEOUT = (1 << 2), /* timeout */
467 AC_ERR_MEDIA = (1 << 3), /* media error */
468 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */
469 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */
470 AC_ERR_SYSTEM = (1 << 6), /* system error */
471 AC_ERR_INVALID = (1 << 7), /* invalid argument */
472 AC_ERR_OTHER = (1 << 8), /* unknown */
473 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */
474 AC_ERR_NCQ = (1 << 10), /* marker for offending NCQ qc */
475 };
476
477 /*
478 * Link power management policy: If you alter this, you also need to
479 * alter libata-scsi.c (for the ascii descriptions)
480 */
481 enum ata_lpm_policy {
482 ATA_LPM_UNKNOWN,
483 ATA_LPM_MAX_POWER,
484 ATA_LPM_MED_POWER,
485 ATA_LPM_MIN_POWER,
486 };
487
488 enum ata_lpm_hints {
489 ATA_LPM_EMPTY = (1 << 0), /* port empty/probing */
490 ATA_LPM_HIPM = (1 << 1), /* may use HIPM */
491 };
492
493 /* forward declarations */
494 struct scsi_device;
495 struct ata_port_operations;
496 struct ata_port;
497 struct ata_link;
498 struct ata_queued_cmd;
499
500 /* typedefs */
501 typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
502 typedef int (*ata_prereset_fn_t)(struct ata_link *link, unsigned long deadline);
503 typedef int (*ata_reset_fn_t)(struct ata_link *link, unsigned int *classes,
504 unsigned long deadline);
505 typedef void (*ata_postreset_fn_t)(struct ata_link *link, unsigned int *classes);
506
507 extern struct device_attribute dev_attr_link_power_management_policy;
508 extern struct device_attribute dev_attr_unload_heads;
509 extern struct device_attribute dev_attr_em_message_type;
510 extern struct device_attribute dev_attr_em_message;
511 extern struct device_attribute dev_attr_sw_activity;
512
513 enum sw_activity {
514 OFF,
515 BLINK_ON,
516 BLINK_OFF,
517 };
518
519 #ifdef CONFIG_ATA_SFF
520 struct ata_ioports {
521 void __iomem *cmd_addr;
522 void __iomem *data_addr;
523 void __iomem *error_addr;
524 void __iomem *feature_addr;
525 void __iomem *nsect_addr;
526 void __iomem *lbal_addr;
527 void __iomem *lbam_addr;
528 void __iomem *lbah_addr;
529 void __iomem *device_addr;
530 void __iomem *status_addr;
531 void __iomem *command_addr;
532 void __iomem *altstatus_addr;
533 void __iomem *ctl_addr;
534 #ifdef CONFIG_ATA_BMDMA
535 void __iomem *bmdma_addr;
536 #endif /* CONFIG_ATA_BMDMA */
537 void __iomem *scr_addr;
538 };
539 #endif /* CONFIG_ATA_SFF */
540
541 struct ata_host {
542 spinlock_t lock;
543 struct device *dev;
544 void __iomem * const *iomap;
545 unsigned int n_ports;
546 void *private_data;
547 struct ata_port_operations *ops;
548 unsigned long flags;
549
550 struct mutex eh_mutex;
551 struct task_struct *eh_owner;
552
553 struct ata_port *simplex_claimed; /* channel owning the DMA */
554 struct ata_port *ports[0];
555 };
556
557 struct ata_queued_cmd {
558 struct ata_port *ap;
559 struct ata_device *dev;
560
561 struct scsi_cmnd *scsicmd;
562 void (*scsidone)(struct scsi_cmnd *);
563
564 struct ata_taskfile tf;
565 u8 cdb[ATAPI_CDB_LEN];
566
567 unsigned long flags; /* ATA_QCFLAG_xxx */
568 unsigned int tag;
569 unsigned int n_elem;
570 unsigned int orig_n_elem;
571
572 int dma_dir;
573
574 unsigned int sect_size;
575
576 unsigned int nbytes;
577 unsigned int extrabytes;
578 unsigned int curbytes;
579
580 struct scatterlist sgent;
581
582 struct scatterlist *sg;
583
584 struct scatterlist *cursg;
585 unsigned int cursg_ofs;
586
587 unsigned int err_mask;
588 struct ata_taskfile result_tf;
589 ata_qc_cb_t complete_fn;
590
591 void *private_data;
592 void *lldd_task;
593 };
594
595 struct ata_port_stats {
596 unsigned long unhandled_irq;
597 unsigned long idle_irq;
598 unsigned long rw_reqbuf;
599 };
600
601 struct ata_ering_entry {
602 unsigned int eflags;
603 unsigned int err_mask;
604 u64 timestamp;
605 };
606
607 struct ata_ering {
608 int cursor;
609 struct ata_ering_entry ring[ATA_ERING_SIZE];
610 };
611
612 struct ata_device {
613 struct ata_link *link;
614 unsigned int devno; /* 0 or 1 */
615 unsigned int horkage; /* List of broken features */
616 unsigned long flags; /* ATA_DFLAG_xxx */
617 struct scsi_device *sdev; /* attached SCSI device */
618 void *private_data;
619 #ifdef CONFIG_ATA_ACPI
620 union acpi_object *gtf_cache;
621 unsigned int gtf_filter;
622 #endif
623 struct device tdev;
624 /* n_sector is CLEAR_BEGIN, read comment above CLEAR_BEGIN */
625 u64 n_sectors; /* size of device, if ATA */
626 u64 n_native_sectors; /* native size, if ATA */
627 unsigned int class; /* ATA_DEV_xxx */
628 unsigned long unpark_deadline;
629
630 u8 pio_mode;
631 u8 dma_mode;
632 u8 xfer_mode;
633 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
634
635 unsigned int multi_count; /* sectors count for
636 READ/WRITE MULTIPLE */
637 unsigned int max_sectors; /* per-device max sectors */
638 unsigned int cdb_len;
639
640 /* per-dev xfer mask */
641 unsigned long pio_mask;
642 unsigned long mwdma_mask;
643 unsigned long udma_mask;
644
645 /* for CHS addressing */
646 u16 cylinders; /* Number of cylinders */
647 u16 heads; /* Number of heads */
648 u16 sectors; /* Number of sectors per track */
649
650 union {
651 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
652 u32 gscr[SATA_PMP_GSCR_DWORDS]; /* PMP GSCR block */
653 };
654
655 /* Identify Device Data Log (30h), SATA Settings (page 08h) */
656 u8 sata_settings[ATA_SECT_SIZE];
657
658 /* error history */
659 int spdn_cnt;
660 /* ering is CLEAR_END, read comment above CLEAR_END */
661 struct ata_ering ering;
662 };
663
664 /* Fields between ATA_DEVICE_CLEAR_BEGIN and ATA_DEVICE_CLEAR_END are
665 * cleared to zero on ata_dev_init().
666 */
667 #define ATA_DEVICE_CLEAR_BEGIN offsetof(struct ata_device, n_sectors)
668 #define ATA_DEVICE_CLEAR_END offsetof(struct ata_device, ering)
669
670 struct ata_eh_info {
671 struct ata_device *dev; /* offending device */
672 u32 serror; /* SError from LLDD */
673 unsigned int err_mask; /* port-wide err_mask */
674 unsigned int action; /* ATA_EH_* action mask */
675 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */
676 unsigned int flags; /* ATA_EHI_* flags */
677
678 unsigned int probe_mask;
679
680 char desc[ATA_EH_DESC_LEN];
681 int desc_len;
682 };
683
684 struct ata_eh_context {
685 struct ata_eh_info i;
686 int tries[ATA_MAX_DEVICES];
687 int cmd_timeout_idx[ATA_MAX_DEVICES]
688 [ATA_EH_CMD_TIMEOUT_TABLE_SIZE];
689 unsigned int classes[ATA_MAX_DEVICES];
690 unsigned int did_probe_mask;
691 unsigned int unloaded_mask;
692 unsigned int saved_ncq_enabled;
693 u8 saved_xfer_mode[ATA_MAX_DEVICES];
694 /* timestamp for the last reset attempt or success */
695 unsigned long last_reset;
696 };
697
698 struct ata_acpi_drive
699 {
700 u32 pio;
701 u32 dma;
702 } __packed;
703
704 struct ata_acpi_gtm {
705 struct ata_acpi_drive drive[2];
706 u32 flags;
707 } __packed;
708
709 struct ata_link {
710 struct ata_port *ap;
711 int pmp; /* port multiplier port # */
712
713 struct device tdev;
714 unsigned int active_tag; /* active tag on this link */
715 u32 sactive; /* active NCQ commands */
716
717 unsigned int flags; /* ATA_LFLAG_xxx */
718
719 u32 saved_scontrol; /* SControl on probe */
720 unsigned int hw_sata_spd_limit;
721 unsigned int sata_spd_limit;
722 unsigned int sata_spd; /* current SATA PHY speed */
723 enum ata_lpm_policy lpm_policy;
724
725 /* record runtime error info, protected by host_set lock */
726 struct ata_eh_info eh_info;
727 /* EH context */
728 struct ata_eh_context eh_context;
729
730 struct ata_device device[ATA_MAX_DEVICES];
731 };
732 #define ATA_LINK_CLEAR_BEGIN offsetof(struct ata_link, active_tag)
733 #define ATA_LINK_CLEAR_END offsetof(struct ata_link, device[0])
734
735 struct ata_port {
736 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */
737 struct ata_port_operations *ops;
738 spinlock_t *lock;
739 /* Flags owned by the EH context. Only EH should touch these once the
740 port is active */
741 unsigned long flags; /* ATA_FLAG_xxx */
742 /* Flags that change dynamically, protected by ap->lock */
743 unsigned int pflags; /* ATA_PFLAG_xxx */
744 unsigned int print_id; /* user visible unique port ID */
745 unsigned int port_no; /* 0 based port no. inside the host */
746
747 #ifdef CONFIG_ATA_SFF
748 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
749 u8 ctl; /* cache of ATA control register */
750 u8 last_ctl; /* Cache last written value */
751 struct ata_link* sff_pio_task_link; /* link currently used */
752 struct delayed_work sff_pio_task;
753 #ifdef CONFIG_ATA_BMDMA
754 struct ata_bmdma_prd *bmdma_prd; /* BMDMA SG list */
755 dma_addr_t bmdma_prd_dma; /* and its DMA mapping */
756 #endif /* CONFIG_ATA_BMDMA */
757 #endif /* CONFIG_ATA_SFF */
758
759 unsigned int pio_mask;
760 unsigned int mwdma_mask;
761 unsigned int udma_mask;
762 unsigned int cbl; /* cable type; ATA_CBL_xxx */
763
764 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
765 unsigned long qc_allocated;
766 unsigned int qc_active;
767 int nr_active_links; /* #links with active qcs */
768
769 struct ata_link link; /* host default link */
770 struct ata_link *slave_link; /* see ata_slave_link_init() */
771
772 int nr_pmp_links; /* nr of available PMP links */
773 struct ata_link *pmp_link; /* array of PMP links */
774 struct ata_link *excl_link; /* for PMP qc exclusion */
775
776 struct ata_port_stats stats;
777 struct ata_host *host;
778 struct device *dev;
779 struct device tdev;
780
781 struct mutex scsi_scan_mutex;
782 struct delayed_work hotplug_task;
783 struct work_struct scsi_rescan_task;
784
785 unsigned int hsm_task_state;
786
787 u32 msg_enable;
788 struct list_head eh_done_q;
789 wait_queue_head_t eh_wait_q;
790 int eh_tries;
791 struct completion park_req_pending;
792
793 pm_message_t pm_mesg;
794 int *pm_result;
795 enum ata_lpm_policy target_lpm_policy;
796
797 struct timer_list fastdrain_timer;
798 unsigned long fastdrain_cnt;
799
800 int em_message_type;
801 void *private_data;
802
803 #ifdef CONFIG_ATA_ACPI
804 struct ata_acpi_gtm __acpi_init_gtm; /* use ata_acpi_init_gtm() */
805 #endif
806 /* owned by EH */
807 u8 sector_buf[ATA_SECT_SIZE] ____cacheline_aligned;
808 };
809
810 /* The following initializer overrides a method to NULL whether one of
811 * its parent has the method defined or not. This is equivalent to
812 * ERR_PTR(-ENOENT). Unfortunately, ERR_PTR doesn't render a constant
813 * expression and thus can't be used as an initializer.
814 */
815 #define ATA_OP_NULL (void *)(unsigned long)(-ENOENT)
816
817 struct ata_port_operations {
818 /*
819 * Command execution
820 */
821 int (*qc_defer)(struct ata_queued_cmd *qc);
822 int (*check_atapi_dma)(struct ata_queued_cmd *qc);
823 void (*qc_prep)(struct ata_queued_cmd *qc);
824 unsigned int (*qc_issue)(struct ata_queued_cmd *qc);
825 bool (*qc_fill_rtf)(struct ata_queued_cmd *qc);
826
827 /*
828 * Configuration and exception handling
829 */
830 int (*cable_detect)(struct ata_port *ap);
831 unsigned long (*mode_filter)(struct ata_device *dev, unsigned long xfer_mask);
832 void (*set_piomode)(struct ata_port *ap, struct ata_device *dev);
833 void (*set_dmamode)(struct ata_port *ap, struct ata_device *dev);
834 int (*set_mode)(struct ata_link *link, struct ata_device **r_failed_dev);
835 unsigned int (*read_id)(struct ata_device *dev, struct ata_taskfile *tf, u16 *id);
836
837 void (*dev_config)(struct ata_device *dev);
838
839 void (*freeze)(struct ata_port *ap);
840 void (*thaw)(struct ata_port *ap);
841 ata_prereset_fn_t prereset;
842 ata_reset_fn_t softreset;
843 ata_reset_fn_t hardreset;
844 ata_postreset_fn_t postreset;
845 ata_prereset_fn_t pmp_prereset;
846 ata_reset_fn_t pmp_softreset;
847 ata_reset_fn_t pmp_hardreset;
848 ata_postreset_fn_t pmp_postreset;
849 void (*error_handler)(struct ata_port *ap);
850 void (*lost_interrupt)(struct ata_port *ap);
851 void (*post_internal_cmd)(struct ata_queued_cmd *qc);
852 void (*sched_eh)(struct ata_port *ap);
853 void (*end_eh)(struct ata_port *ap);
854
855 /*
856 * Optional features
857 */
858 int (*scr_read)(struct ata_link *link, unsigned int sc_reg, u32 *val);
859 int (*scr_write)(struct ata_link *link, unsigned int sc_reg, u32 val);
860 void (*pmp_attach)(struct ata_port *ap);
861 void (*pmp_detach)(struct ata_port *ap);
862 int (*set_lpm)(struct ata_link *link, enum ata_lpm_policy policy,
863 unsigned hints);
864
865 /*
866 * Start, stop, suspend and resume
867 */
868 int (*port_suspend)(struct ata_port *ap, pm_message_t mesg);
869 int (*port_resume)(struct ata_port *ap);
870 int (*port_start)(struct ata_port *ap);
871 void (*port_stop)(struct ata_port *ap);
872 void (*host_stop)(struct ata_host *host);
873
874 #ifdef CONFIG_ATA_SFF
875 /*
876 * SFF / taskfile oriented ops
877 */
878 void (*sff_dev_select)(struct ata_port *ap, unsigned int device);
879 void (*sff_set_devctl)(struct ata_port *ap, u8 ctl);
880 u8 (*sff_check_status)(struct ata_port *ap);
881 u8 (*sff_check_altstatus)(struct ata_port *ap);
882 void (*sff_tf_load)(struct ata_port *ap, const struct ata_taskfile *tf);
883 void (*sff_tf_read)(struct ata_port *ap, struct ata_taskfile *tf);
884 void (*sff_exec_command)(struct ata_port *ap,
885 const struct ata_taskfile *tf);
886 unsigned int (*sff_data_xfer)(struct ata_device *dev,
887 unsigned char *buf, unsigned int buflen, int rw);
888 void (*sff_irq_on)(struct ata_port *);
889 bool (*sff_irq_check)(struct ata_port *);
890 void (*sff_irq_clear)(struct ata_port *);
891 void (*sff_drain_fifo)(struct ata_queued_cmd *qc);
892
893 #ifdef CONFIG_ATA_BMDMA
894 void (*bmdma_setup)(struct ata_queued_cmd *qc);
895 void (*bmdma_start)(struct ata_queued_cmd *qc);
896 void (*bmdma_stop)(struct ata_queued_cmd *qc);
897 u8 (*bmdma_status)(struct ata_port *ap);
898 #endif /* CONFIG_ATA_BMDMA */
899 #endif /* CONFIG_ATA_SFF */
900
901 ssize_t (*em_show)(struct ata_port *ap, char *buf);
902 ssize_t (*em_store)(struct ata_port *ap, const char *message,
903 size_t size);
904 ssize_t (*sw_activity_show)(struct ata_device *dev, char *buf);
905 ssize_t (*sw_activity_store)(struct ata_device *dev,
906 enum sw_activity val);
907 /*
908 * Obsolete
909 */
910 void (*phy_reset)(struct ata_port *ap);
911 void (*eng_timeout)(struct ata_port *ap);
912
913 /*
914 * ->inherits must be the last field and all the preceding
915 * fields must be pointers.
916 */
917 const struct ata_port_operations *inherits;
918 };
919
920 struct ata_port_info {
921 unsigned long flags;
922 unsigned long link_flags;
923 unsigned long pio_mask;
924 unsigned long mwdma_mask;
925 unsigned long udma_mask;
926 struct ata_port_operations *port_ops;
927 void *private_data;
928 };
929
930 struct ata_timing {
931 unsigned short mode; /* ATA mode */
932 unsigned short setup; /* t1 */
933 unsigned short act8b; /* t2 for 8-bit I/O */
934 unsigned short rec8b; /* t2i for 8-bit I/O */
935 unsigned short cyc8b; /* t0 for 8-bit I/O */
936 unsigned short active; /* t2 or tD */
937 unsigned short recover; /* t2i or tK */
938 unsigned short dmack_hold; /* tj */
939 unsigned short cycle; /* t0 */
940 unsigned short udma; /* t2CYCTYP/2 */
941 };
942
943 /*
944 * Core layer - drivers/ata/libata-core.c
945 */
946 extern const unsigned long sata_deb_timing_normal[];
947 extern const unsigned long sata_deb_timing_hotplug[];
948 extern const unsigned long sata_deb_timing_long[];
949
950 extern struct ata_port_operations ata_dummy_port_ops;
951 extern const struct ata_port_info ata_dummy_port_info;
952
953 static inline const unsigned long *
954 sata_ehc_deb_timing(struct ata_eh_context *ehc)
955 {
956 if (ehc->i.flags & ATA_EHI_HOTPLUGGED)
957 return sata_deb_timing_hotplug;
958 else
959 return sata_deb_timing_normal;
960 }
961
962 static inline int ata_port_is_dummy(struct ata_port *ap)
963 {
964 return ap->ops == &ata_dummy_port_ops;
965 }
966
967 extern int sata_set_spd(struct ata_link *link);
968 extern int ata_std_prereset(struct ata_link *link, unsigned long deadline);
969 extern int ata_wait_after_reset(struct ata_link *link, unsigned long deadline,
970 int (*check_ready)(struct ata_link *link));
971 extern int sata_link_debounce(struct ata_link *link,
972 const unsigned long *params, unsigned long deadline);
973 extern int sata_link_resume(struct ata_link *link, const unsigned long *params,
974 unsigned long deadline);
975 extern int sata_link_scr_lpm(struct ata_link *link, enum ata_lpm_policy policy,
976 bool spm_wakeup);
977 extern int sata_link_hardreset(struct ata_link *link,
978 const unsigned long *timing, unsigned long deadline,
979 bool *online, int (*check_ready)(struct ata_link *));
980 extern int sata_std_hardreset(struct ata_link *link, unsigned int *class,
981 unsigned long deadline);
982 extern void ata_std_postreset(struct ata_link *link, unsigned int *classes);
983
984 extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports);
985 extern struct ata_host *ata_host_alloc_pinfo(struct device *dev,
986 const struct ata_port_info * const * ppi, int n_ports);
987 extern int ata_slave_link_init(struct ata_port *ap);
988 extern int ata_host_start(struct ata_host *host);
989 extern int ata_host_register(struct ata_host *host,
990 struct scsi_host_template *sht);
991 extern int ata_host_activate(struct ata_host *host, int irq,
992 irq_handler_t irq_handler, unsigned long irq_flags,
993 struct scsi_host_template *sht);
994 extern void ata_host_detach(struct ata_host *host);
995 extern void ata_host_init(struct ata_host *, struct device *, struct ata_port_operations *);
996 extern int ata_scsi_detect(struct scsi_host_template *sht);
997 extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
998 extern int ata_scsi_queuecmd(struct Scsi_Host *h, struct scsi_cmnd *cmd);
999 extern int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *dev,
1000 int cmd, void __user *arg);
1001 extern void ata_sas_port_destroy(struct ata_port *);
1002 extern struct ata_port *ata_sas_port_alloc(struct ata_host *,
1003 struct ata_port_info *, struct Scsi_Host *);
1004 extern void ata_sas_async_probe(struct ata_port *ap);
1005 extern int ata_sas_sync_probe(struct ata_port *ap);
1006 extern int ata_sas_port_init(struct ata_port *);
1007 extern int ata_sas_port_start(struct ata_port *ap);
1008 extern void ata_sas_port_stop(struct ata_port *ap);
1009 extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *);
1010 extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, struct ata_port *ap);
1011 extern int sata_scr_valid(struct ata_link *link);
1012 extern int sata_scr_read(struct ata_link *link, int reg, u32 *val);
1013 extern int sata_scr_write(struct ata_link *link, int reg, u32 val);
1014 extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val);
1015 extern bool ata_link_online(struct ata_link *link);
1016 extern bool ata_link_offline(struct ata_link *link);
1017 #ifdef CONFIG_PM
1018 extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg);
1019 extern void ata_host_resume(struct ata_host *host);
1020 extern int ata_sas_port_async_suspend(struct ata_port *ap, int *async);
1021 extern int ata_sas_port_async_resume(struct ata_port *ap, int *async);
1022 #else
1023 static inline int ata_sas_port_async_suspend(struct ata_port *ap, int *async)
1024 {
1025 return 0;
1026 }
1027 static inline int ata_sas_port_async_resume(struct ata_port *ap, int *async)
1028 {
1029 return 0;
1030 }
1031 #endif
1032 extern int ata_ratelimit(void);
1033 extern void ata_msleep(struct ata_port *ap, unsigned int msecs);
1034 extern u32 ata_wait_register(struct ata_port *ap, void __iomem *reg, u32 mask,
1035 u32 val, unsigned long interval, unsigned long timeout);
1036 extern int atapi_cmd_type(u8 opcode);
1037 extern void ata_tf_to_fis(const struct ata_taskfile *tf,
1038 u8 pmp, int is_cmd, u8 *fis);
1039 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
1040 extern unsigned long ata_pack_xfermask(unsigned long pio_mask,
1041 unsigned long mwdma_mask, unsigned long udma_mask);
1042 extern void ata_unpack_xfermask(unsigned long xfer_mask,
1043 unsigned long *pio_mask, unsigned long *mwdma_mask,
1044 unsigned long *udma_mask);
1045 extern u8 ata_xfer_mask2mode(unsigned long xfer_mask);
1046 extern unsigned long ata_xfer_mode2mask(u8 xfer_mode);
1047 extern int ata_xfer_mode2shift(unsigned long xfer_mode);
1048 extern const char *ata_mode_string(unsigned long xfer_mask);
1049 extern unsigned long ata_id_xfermask(const u16 *id);
1050 extern int ata_std_qc_defer(struct ata_queued_cmd *qc);
1051 extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
1052 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
1053 unsigned int n_elem);
1054 extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
1055 extern void ata_dev_disable(struct ata_device *adev);
1056 extern void ata_id_string(const u16 *id, unsigned char *s,
1057 unsigned int ofs, unsigned int len);
1058 extern void ata_id_c_string(const u16 *id, unsigned char *s,
1059 unsigned int ofs, unsigned int len);
1060 extern unsigned int ata_do_dev_read_id(struct ata_device *dev,
1061 struct ata_taskfile *tf, u16 *id);
1062 extern void ata_qc_complete(struct ata_queued_cmd *qc);
1063 extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active);
1064 extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd);
1065 extern int ata_std_bios_param(struct scsi_device *sdev,
1066 struct block_device *bdev,
1067 sector_t capacity, int geom[]);
1068 extern void ata_scsi_unlock_native_capacity(struct scsi_device *sdev);
1069 extern int ata_scsi_slave_config(struct scsi_device *sdev);
1070 extern void ata_scsi_slave_destroy(struct scsi_device *sdev);
1071 extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
1072 int queue_depth, int reason);
1073 extern int __ata_change_queue_depth(struct ata_port *ap, struct scsi_device *sdev,
1074 int queue_depth, int reason);
1075 extern struct ata_device *ata_dev_pair(struct ata_device *adev);
1076 extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev);
1077 extern void ata_scsi_port_error_handler(struct Scsi_Host *host, struct ata_port *ap);
1078 extern void ata_scsi_cmd_error_handler(struct Scsi_Host *host, struct ata_port *ap, struct list_head *eh_q);
1079
1080 extern int ata_cable_40wire(struct ata_port *ap);
1081 extern int ata_cable_80wire(struct ata_port *ap);
1082 extern int ata_cable_sata(struct ata_port *ap);
1083 extern int ata_cable_ignore(struct ata_port *ap);
1084 extern int ata_cable_unknown(struct ata_port *ap);
1085
1086 /* Timing helpers */
1087 extern unsigned int ata_pio_need_iordy(const struct ata_device *);
1088 extern const struct ata_timing *ata_timing_find_mode(u8 xfer_mode);
1089 extern int ata_timing_compute(struct ata_device *, unsigned short,
1090 struct ata_timing *, int, int);
1091 extern void ata_timing_merge(const struct ata_timing *,
1092 const struct ata_timing *, struct ata_timing *,
1093 unsigned int);
1094 extern u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle);
1095
1096 /* PCI */
1097 #ifdef CONFIG_PCI
1098 struct pci_dev;
1099
1100 struct pci_bits {
1101 unsigned int reg; /* PCI config register to read */
1102 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
1103 unsigned long mask;
1104 unsigned long val;
1105 };
1106
1107 extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
1108 extern void ata_pci_remove_one(struct pci_dev *pdev);
1109
1110 #ifdef CONFIG_PM
1111 extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg);
1112 extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev);
1113 extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
1114 extern int ata_pci_device_resume(struct pci_dev *pdev);
1115 #endif /* CONFIG_PM */
1116 #endif /* CONFIG_PCI */
1117
1118 struct platform_device;
1119
1120 extern int ata_platform_remove_one(struct platform_device *pdev);
1121
1122 /*
1123 * ACPI - drivers/ata/libata-acpi.c
1124 */
1125 #ifdef CONFIG_ATA_ACPI
1126 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
1127 {
1128 if (ap->pflags & ATA_PFLAG_INIT_GTM_VALID)
1129 return &ap->__acpi_init_gtm;
1130 return NULL;
1131 }
1132 int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm);
1133 int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *stm);
1134 unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev,
1135 const struct ata_acpi_gtm *gtm);
1136 acpi_handle ata_ap_acpi_handle(struct ata_port *ap);
1137 acpi_handle ata_dev_acpi_handle(struct ata_device *dev);
1138 int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm);
1139 #else
1140 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
1141 {
1142 return NULL;
1143 }
1144
1145 static inline int ata_acpi_stm(const struct ata_port *ap,
1146 struct ata_acpi_gtm *stm)
1147 {
1148 return -ENOSYS;
1149 }
1150
1151 static inline int ata_acpi_gtm(const struct ata_port *ap,
1152 struct ata_acpi_gtm *stm)
1153 {
1154 return -ENOSYS;
1155 }
1156
1157 static inline unsigned int ata_acpi_gtm_xfermask(struct ata_device *dev,
1158 const struct ata_acpi_gtm *gtm)
1159 {
1160 return 0;
1161 }
1162
1163 static inline int ata_acpi_cbl_80wire(struct ata_port *ap,
1164 const struct ata_acpi_gtm *gtm)
1165 {
1166 return 0;
1167 }
1168 #endif
1169
1170 /*
1171 * EH - drivers/ata/libata-eh.c
1172 */
1173 extern void ata_port_schedule_eh(struct ata_port *ap);
1174 extern void ata_port_wait_eh(struct ata_port *ap);
1175 extern int ata_link_abort(struct ata_link *link);
1176 extern int ata_port_abort(struct ata_port *ap);
1177 extern int ata_port_freeze(struct ata_port *ap);
1178 extern int sata_async_notification(struct ata_port *ap);
1179
1180 extern void ata_eh_freeze_port(struct ata_port *ap);
1181 extern void ata_eh_thaw_port(struct ata_port *ap);
1182
1183 extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
1184 extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
1185 extern void ata_eh_analyze_ncq_error(struct ata_link *link);
1186
1187 extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
1188 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
1189 ata_postreset_fn_t postreset);
1190 extern void ata_std_error_handler(struct ata_port *ap);
1191 extern void ata_std_sched_eh(struct ata_port *ap);
1192 extern void ata_std_end_eh(struct ata_port *ap);
1193 extern int ata_link_nr_enabled(struct ata_link *link);
1194
1195 /*
1196 * Base operations to inherit from and initializers for sht
1197 *
1198 * Operations
1199 *
1200 * base : Common to all libata drivers.
1201 * sata : SATA controllers w/ native interface.
1202 * pmp : SATA controllers w/ PMP support.
1203 * sff : SFF ATA controllers w/o BMDMA support.
1204 * bmdma : SFF ATA controllers w/ BMDMA support.
1205 *
1206 * sht initializers
1207 *
1208 * BASE : Common to all libata drivers. The user must set
1209 * sg_tablesize and dma_boundary.
1210 * PIO : SFF ATA controllers w/ only PIO support.
1211 * BMDMA : SFF ATA controllers w/ BMDMA support. sg_tablesize and
1212 * dma_boundary are set to BMDMA limits.
1213 * NCQ : SATA controllers supporting NCQ. The user must set
1214 * sg_tablesize, dma_boundary and can_queue.
1215 */
1216 extern const struct ata_port_operations ata_base_port_ops;
1217 extern const struct ata_port_operations sata_port_ops;
1218 extern struct device_attribute *ata_common_sdev_attrs[];
1219
1220 #define ATA_BASE_SHT(drv_name) \
1221 .module = THIS_MODULE, \
1222 .name = drv_name, \
1223 .ioctl = ata_scsi_ioctl, \
1224 .queuecommand = ata_scsi_queuecmd, \
1225 .can_queue = ATA_DEF_QUEUE, \
1226 .this_id = ATA_SHT_THIS_ID, \
1227 .cmd_per_lun = ATA_SHT_CMD_PER_LUN, \
1228 .emulated = ATA_SHT_EMULATED, \
1229 .use_clustering = ATA_SHT_USE_CLUSTERING, \
1230 .proc_name = drv_name, \
1231 .slave_configure = ata_scsi_slave_config, \
1232 .slave_destroy = ata_scsi_slave_destroy, \
1233 .bios_param = ata_std_bios_param, \
1234 .unlock_native_capacity = ata_scsi_unlock_native_capacity, \
1235 .sdev_attrs = ata_common_sdev_attrs
1236
1237 #define ATA_NCQ_SHT(drv_name) \
1238 ATA_BASE_SHT(drv_name), \
1239 .change_queue_depth = ata_scsi_change_queue_depth
1240
1241 /*
1242 * PMP helpers
1243 */
1244 #ifdef CONFIG_SATA_PMP
1245 static inline bool sata_pmp_supported(struct ata_port *ap)
1246 {
1247 return ap->flags & ATA_FLAG_PMP;
1248 }
1249
1250 static inline bool sata_pmp_attached(struct ata_port *ap)
1251 {
1252 return ap->nr_pmp_links != 0;
1253 }
1254
1255 static inline int ata_is_host_link(const struct ata_link *link)
1256 {
1257 return link == &link->ap->link || link == link->ap->slave_link;
1258 }
1259 #else /* CONFIG_SATA_PMP */
1260 static inline bool sata_pmp_supported(struct ata_port *ap)
1261 {
1262 return false;
1263 }
1264
1265 static inline bool sata_pmp_attached(struct ata_port *ap)
1266 {
1267 return false;
1268 }
1269
1270 static inline int ata_is_host_link(const struct ata_link *link)
1271 {
1272 return 1;
1273 }
1274 #endif /* CONFIG_SATA_PMP */
1275
1276 static inline int sata_srst_pmp(struct ata_link *link)
1277 {
1278 if (sata_pmp_supported(link->ap) && ata_is_host_link(link))
1279 return SATA_PMP_CTRL_PORT;
1280 return link->pmp;
1281 }
1282
1283 /*
1284 * printk helpers
1285 */
1286 __printf(3, 4)
1287 int ata_port_printk(const struct ata_port *ap, const char *level,
1288 const char *fmt, ...);
1289 __printf(3, 4)
1290 int ata_link_printk(const struct ata_link *link, const char *level,
1291 const char *fmt, ...);
1292 __printf(3, 4)
1293 int ata_dev_printk(const struct ata_device *dev, const char *level,
1294 const char *fmt, ...);
1295
1296 #define ata_port_err(ap, fmt, ...) \
1297 ata_port_printk(ap, KERN_ERR, fmt, ##__VA_ARGS__)
1298 #define ata_port_warn(ap, fmt, ...) \
1299 ata_port_printk(ap, KERN_WARNING, fmt, ##__VA_ARGS__)
1300 #define ata_port_notice(ap, fmt, ...) \
1301 ata_port_printk(ap, KERN_NOTICE, fmt, ##__VA_ARGS__)
1302 #define ata_port_info(ap, fmt, ...) \
1303 ata_port_printk(ap, KERN_INFO, fmt, ##__VA_ARGS__)
1304 #define ata_port_dbg(ap, fmt, ...) \
1305 ata_port_printk(ap, KERN_DEBUG, fmt, ##__VA_ARGS__)
1306
1307 #define ata_link_err(link, fmt, ...) \
1308 ata_link_printk(link, KERN_ERR, fmt, ##__VA_ARGS__)
1309 #define ata_link_warn(link, fmt, ...) \
1310 ata_link_printk(link, KERN_WARNING, fmt, ##__VA_ARGS__)
1311 #define ata_link_notice(link, fmt, ...) \
1312 ata_link_printk(link, KERN_NOTICE, fmt, ##__VA_ARGS__)
1313 #define ata_link_info(link, fmt, ...) \
1314 ata_link_printk(link, KERN_INFO, fmt, ##__VA_ARGS__)
1315 #define ata_link_dbg(link, fmt, ...) \
1316 ata_link_printk(link, KERN_DEBUG, fmt, ##__VA_ARGS__)
1317
1318 #define ata_dev_err(dev, fmt, ...) \
1319 ata_dev_printk(dev, KERN_ERR, fmt, ##__VA_ARGS__)
1320 #define ata_dev_warn(dev, fmt, ...) \
1321 ata_dev_printk(dev, KERN_WARNING, fmt, ##__VA_ARGS__)
1322 #define ata_dev_notice(dev, fmt, ...) \
1323 ata_dev_printk(dev, KERN_NOTICE, fmt, ##__VA_ARGS__)
1324 #define ata_dev_info(dev, fmt, ...) \
1325 ata_dev_printk(dev, KERN_INFO, fmt, ##__VA_ARGS__)
1326 #define ata_dev_dbg(dev, fmt, ...) \
1327 ata_dev_printk(dev, KERN_DEBUG, fmt, ##__VA_ARGS__)
1328
1329 void ata_print_version(const struct device *dev, const char *version);
1330
1331 /*
1332 * ata_eh_info helpers
1333 */
1334 extern __printf(2, 3)
1335 void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...);
1336 extern __printf(2, 3)
1337 void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...);
1338 extern void ata_ehi_clear_desc(struct ata_eh_info *ehi);
1339
1340 static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
1341 {
1342 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
1343 ehi->flags |= ATA_EHI_HOTPLUGGED;
1344 ehi->action |= ATA_EH_RESET | ATA_EH_ENABLE_LINK;
1345 ehi->err_mask |= AC_ERR_ATA_BUS;
1346 }
1347
1348 /*
1349 * port description helpers
1350 */
1351 extern __printf(2, 3)
1352 void ata_port_desc(struct ata_port *ap, const char *fmt, ...);
1353 #ifdef CONFIG_PCI
1354 extern void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset,
1355 const char *name);
1356 #endif
1357
1358 static inline unsigned int ata_tag_valid(unsigned int tag)
1359 {
1360 return (tag < ATA_MAX_QUEUE) ? 1 : 0;
1361 }
1362
1363 static inline unsigned int ata_tag_internal(unsigned int tag)
1364 {
1365 return tag == ATA_TAG_INTERNAL;
1366 }
1367
1368 /*
1369 * device helpers
1370 */
1371 static inline unsigned int ata_class_enabled(unsigned int class)
1372 {
1373 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI ||
1374 class == ATA_DEV_PMP || class == ATA_DEV_SEMB;
1375 }
1376
1377 static inline unsigned int ata_class_disabled(unsigned int class)
1378 {
1379 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP ||
1380 class == ATA_DEV_PMP_UNSUP || class == ATA_DEV_SEMB_UNSUP;
1381 }
1382
1383 static inline unsigned int ata_class_absent(unsigned int class)
1384 {
1385 return !ata_class_enabled(class) && !ata_class_disabled(class);
1386 }
1387
1388 static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
1389 {
1390 return ata_class_enabled(dev->class);
1391 }
1392
1393 static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
1394 {
1395 return ata_class_disabled(dev->class);
1396 }
1397
1398 static inline unsigned int ata_dev_absent(const struct ata_device *dev)
1399 {
1400 return ata_class_absent(dev->class);
1401 }
1402
1403 /*
1404 * link helpers
1405 */
1406 static inline int ata_link_max_devices(const struct ata_link *link)
1407 {
1408 if (ata_is_host_link(link) && link->ap->flags & ATA_FLAG_SLAVE_POSS)
1409 return 2;
1410 return 1;
1411 }
1412
1413 static inline int ata_link_active(struct ata_link *link)
1414 {
1415 return ata_tag_valid(link->active_tag) || link->sactive;
1416 }
1417
1418 /*
1419 * Iterators
1420 *
1421 * ATA_LITER_* constants are used to select link iteration mode and
1422 * ATA_DITER_* device iteration mode.
1423 *
1424 * For a custom iteration directly using ata_{link|dev}_next(), if
1425 * @link or @dev, respectively, is NULL, the first element is
1426 * returned. @dev and @link can be any valid device or link and the
1427 * next element according to the iteration mode will be returned.
1428 * After the last element, NULL is returned.
1429 */
1430 enum ata_link_iter_mode {
1431 ATA_LITER_EDGE, /* if present, PMP links only; otherwise,
1432 * host link. no slave link */
1433 ATA_LITER_HOST_FIRST, /* host link followed by PMP or slave links */
1434 ATA_LITER_PMP_FIRST, /* PMP links followed by host link,
1435 * slave link still comes after host link */
1436 };
1437
1438 enum ata_dev_iter_mode {
1439 ATA_DITER_ENABLED,
1440 ATA_DITER_ENABLED_REVERSE,
1441 ATA_DITER_ALL,
1442 ATA_DITER_ALL_REVERSE,
1443 };
1444
1445 extern struct ata_link *ata_link_next(struct ata_link *link,
1446 struct ata_port *ap,
1447 enum ata_link_iter_mode mode);
1448
1449 extern struct ata_device *ata_dev_next(struct ata_device *dev,
1450 struct ata_link *link,
1451 enum ata_dev_iter_mode mode);
1452
1453 /*
1454 * Shortcut notation for iterations
1455 *
1456 * ata_for_each_link() iterates over each link of @ap according to
1457 * @mode. @link points to the current link in the loop. @link is
1458 * NULL after loop termination. ata_for_each_dev() works the same way
1459 * except that it iterates over each device of @link.
1460 *
1461 * Note that the mode prefixes ATA_{L|D}ITER_ shouldn't need to be
1462 * specified when using the following shorthand notations. Only the
1463 * mode itself (EDGE, HOST_FIRST, ENABLED, etc...) should be
1464 * specified. This not only increases brevity but also makes it
1465 * impossible to use ATA_LITER_* for device iteration or vice-versa.
1466 */
1467 #define ata_for_each_link(link, ap, mode) \
1468 for ((link) = ata_link_next(NULL, (ap), ATA_LITER_##mode); (link); \
1469 (link) = ata_link_next((link), (ap), ATA_LITER_##mode))
1470
1471 #define ata_for_each_dev(dev, link, mode) \
1472 for ((dev) = ata_dev_next(NULL, (link), ATA_DITER_##mode); (dev); \
1473 (dev) = ata_dev_next((dev), (link), ATA_DITER_##mode))
1474
1475 /**
1476 * ata_ncq_enabled - Test whether NCQ is enabled
1477 * @dev: ATA device to test for
1478 *
1479 * LOCKING:
1480 * spin_lock_irqsave(host lock)
1481 *
1482 * RETURNS:
1483 * 1 if NCQ is enabled for @dev, 0 otherwise.
1484 */
1485 static inline int ata_ncq_enabled(struct ata_device *dev)
1486 {
1487 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF |
1488 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ;
1489 }
1490
1491 static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
1492 {
1493 qc->tf.ctl |= ATA_NIEN;
1494 }
1495
1496 static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap,
1497 unsigned int tag)
1498 {
1499 if (likely(ata_tag_valid(tag)))
1500 return &ap->qcmd[tag];
1501 return NULL;
1502 }
1503
1504 static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap,
1505 unsigned int tag)
1506 {
1507 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
1508
1509 if (unlikely(!qc) || !ap->ops->error_handler)
1510 return qc;
1511
1512 if ((qc->flags & (ATA_QCFLAG_ACTIVE |
1513 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE)
1514 return qc;
1515
1516 return NULL;
1517 }
1518
1519 static inline unsigned int ata_qc_raw_nbytes(struct ata_queued_cmd *qc)
1520 {
1521 return qc->nbytes - min(qc->extrabytes, qc->nbytes);
1522 }
1523
1524 static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
1525 {
1526 memset(tf, 0, sizeof(*tf));
1527
1528 #ifdef CONFIG_ATA_SFF
1529 tf->ctl = dev->link->ap->ctl;
1530 #else
1531 tf->ctl = ATA_DEVCTL_OBS;
1532 #endif
1533 if (dev->devno == 0)
1534 tf->device = ATA_DEVICE_OBS;
1535 else
1536 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
1537 }
1538
1539 static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
1540 {
1541 qc->dma_dir = DMA_NONE;
1542 qc->sg = NULL;
1543 qc->flags = 0;
1544 qc->cursg = NULL;
1545 qc->cursg_ofs = 0;
1546 qc->nbytes = qc->extrabytes = qc->curbytes = 0;
1547 qc->n_elem = 0;
1548 qc->err_mask = 0;
1549 qc->sect_size = ATA_SECT_SIZE;
1550
1551 ata_tf_init(qc->dev, &qc->tf);
1552
1553 /* init result_tf such that it indicates normal completion */
1554 qc->result_tf.command = ATA_DRDY;
1555 qc->result_tf.feature = 0;
1556 }
1557
1558 static inline int ata_try_flush_cache(const struct ata_device *dev)
1559 {
1560 return ata_id_wcache_enabled(dev->id) ||
1561 ata_id_has_flush(dev->id) ||
1562 ata_id_has_flush_ext(dev->id);
1563 }
1564
1565 static inline unsigned int ac_err_mask(u8 status)
1566 {
1567 if (status & (ATA_BUSY | ATA_DRQ))
1568 return AC_ERR_HSM;
1569 if (status & (ATA_ERR | ATA_DF))
1570 return AC_ERR_DEV;
1571 return 0;
1572 }
1573
1574 static inline unsigned int __ac_err_mask(u8 status)
1575 {
1576 unsigned int mask = ac_err_mask(status);
1577 if (mask == 0)
1578 return AC_ERR_OTHER;
1579 return mask;
1580 }
1581
1582 static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
1583 {
1584 return *(struct ata_port **)&host->hostdata[0];
1585 }
1586
1587 static inline int ata_check_ready(u8 status)
1588 {
1589 if (!(status & ATA_BUSY))
1590 return 1;
1591
1592 /* 0xff indicates either no device or device not ready */
1593 if (status == 0xff)
1594 return -ENODEV;
1595
1596 return 0;
1597 }
1598
1599 static inline unsigned long ata_deadline(unsigned long from_jiffies,
1600 unsigned long timeout_msecs)
1601 {
1602 return from_jiffies + msecs_to_jiffies(timeout_msecs);
1603 }
1604
1605 /* Don't open code these in drivers as there are traps. Firstly the range may
1606 change in future hardware and specs, secondly 0xFF means 'no DMA' but is
1607 > UDMA_0. Dyma ddreigiau */
1608
1609 static inline int ata_using_mwdma(struct ata_device *adev)
1610 {
1611 if (adev->dma_mode >= XFER_MW_DMA_0 && adev->dma_mode <= XFER_MW_DMA_4)
1612 return 1;
1613 return 0;
1614 }
1615
1616 static inline int ata_using_udma(struct ata_device *adev)
1617 {
1618 if (adev->dma_mode >= XFER_UDMA_0 && adev->dma_mode <= XFER_UDMA_7)
1619 return 1;
1620 return 0;
1621 }
1622
1623 static inline int ata_dma_enabled(struct ata_device *adev)
1624 {
1625 return (adev->dma_mode == 0xFF ? 0 : 1);
1626 }
1627
1628 /**************************************************************************
1629 * PMP - drivers/ata/libata-pmp.c
1630 */
1631 #ifdef CONFIG_SATA_PMP
1632
1633 extern const struct ata_port_operations sata_pmp_port_ops;
1634
1635 extern int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc);
1636 extern void sata_pmp_error_handler(struct ata_port *ap);
1637
1638 #else /* CONFIG_SATA_PMP */
1639
1640 #define sata_pmp_port_ops sata_port_ops
1641 #define sata_pmp_qc_defer_cmd_switch ata_std_qc_defer
1642 #define sata_pmp_error_handler ata_std_error_handler
1643
1644 #endif /* CONFIG_SATA_PMP */
1645
1646
1647 /**************************************************************************
1648 * SFF - drivers/ata/libata-sff.c
1649 */
1650 #ifdef CONFIG_ATA_SFF
1651
1652 extern const struct ata_port_operations ata_sff_port_ops;
1653 extern const struct ata_port_operations ata_bmdma32_port_ops;
1654
1655 /* PIO only, sg_tablesize and dma_boundary limits can be removed */
1656 #define ATA_PIO_SHT(drv_name) \
1657 ATA_BASE_SHT(drv_name), \
1658 .sg_tablesize = LIBATA_MAX_PRD, \
1659 .dma_boundary = ATA_DMA_BOUNDARY
1660
1661 extern void ata_sff_dev_select(struct ata_port *ap, unsigned int device);
1662 extern u8 ata_sff_check_status(struct ata_port *ap);
1663 extern void ata_sff_pause(struct ata_port *ap);
1664 extern void ata_sff_dma_pause(struct ata_port *ap);
1665 extern int ata_sff_busy_sleep(struct ata_port *ap,
1666 unsigned long timeout_pat, unsigned long timeout);
1667 extern int ata_sff_wait_ready(struct ata_link *link, unsigned long deadline);
1668 extern void ata_sff_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
1669 extern void ata_sff_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
1670 extern void ata_sff_exec_command(struct ata_port *ap,
1671 const struct ata_taskfile *tf);
1672 extern unsigned int ata_sff_data_xfer(struct ata_device *dev,
1673 unsigned char *buf, unsigned int buflen, int rw);
1674 extern unsigned int ata_sff_data_xfer32(struct ata_device *dev,
1675 unsigned char *buf, unsigned int buflen, int rw);
1676 extern unsigned int ata_sff_data_xfer_noirq(struct ata_device *dev,
1677 unsigned char *buf, unsigned int buflen, int rw);
1678 extern void ata_sff_irq_on(struct ata_port *ap);
1679 extern void ata_sff_irq_clear(struct ata_port *ap);
1680 extern int ata_sff_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
1681 u8 status, int in_wq);
1682 extern void ata_sff_queue_work(struct work_struct *work);
1683 extern void ata_sff_queue_delayed_work(struct delayed_work *dwork,
1684 unsigned long delay);
1685 extern void ata_sff_queue_pio_task(struct ata_link *link, unsigned long delay);
1686 extern unsigned int ata_sff_qc_issue(struct ata_queued_cmd *qc);
1687 extern bool ata_sff_qc_fill_rtf(struct ata_queued_cmd *qc);
1688 extern unsigned int ata_sff_port_intr(struct ata_port *ap,
1689 struct ata_queued_cmd *qc);
1690 extern irqreturn_t ata_sff_interrupt(int irq, void *dev_instance);
1691 extern void ata_sff_lost_interrupt(struct ata_port *ap);
1692 extern void ata_sff_freeze(struct ata_port *ap);
1693 extern void ata_sff_thaw(struct ata_port *ap);
1694 extern int ata_sff_prereset(struct ata_link *link, unsigned long deadline);
1695 extern unsigned int ata_sff_dev_classify(struct ata_device *dev, int present,
1696 u8 *r_err);
1697 extern int ata_sff_wait_after_reset(struct ata_link *link, unsigned int devmask,
1698 unsigned long deadline);
1699 extern int ata_sff_softreset(struct ata_link *link, unsigned int *classes,
1700 unsigned long deadline);
1701 extern int sata_sff_hardreset(struct ata_link *link, unsigned int *class,
1702 unsigned long deadline);
1703 extern void ata_sff_postreset(struct ata_link *link, unsigned int *classes);
1704 extern void ata_sff_drain_fifo(struct ata_queued_cmd *qc);
1705 extern void ata_sff_error_handler(struct ata_port *ap);
1706 extern void ata_sff_std_ports(struct ata_ioports *ioaddr);
1707 #ifdef CONFIG_PCI
1708 extern int ata_pci_sff_init_host(struct ata_host *host);
1709 extern int ata_pci_sff_prepare_host(struct pci_dev *pdev,
1710 const struct ata_port_info * const * ppi,
1711 struct ata_host **r_host);
1712 extern int ata_pci_sff_activate_host(struct ata_host *host,
1713 irq_handler_t irq_handler,
1714 struct scsi_host_template *sht);
1715 extern int ata_pci_sff_init_one(struct pci_dev *pdev,
1716 const struct ata_port_info * const * ppi,
1717 struct scsi_host_template *sht, void *host_priv, int hflags);
1718 #endif /* CONFIG_PCI */
1719
1720 #ifdef CONFIG_ATA_BMDMA
1721
1722 extern const struct ata_port_operations ata_bmdma_port_ops;
1723
1724 #define ATA_BMDMA_SHT(drv_name) \
1725 ATA_BASE_SHT(drv_name), \
1726 .sg_tablesize = LIBATA_MAX_PRD, \
1727 .dma_boundary = ATA_DMA_BOUNDARY
1728
1729 extern void ata_bmdma_qc_prep(struct ata_queued_cmd *qc);
1730 extern unsigned int ata_bmdma_qc_issue(struct ata_queued_cmd *qc);
1731 extern void ata_bmdma_dumb_qc_prep(struct ata_queued_cmd *qc);
1732 extern unsigned int ata_bmdma_port_intr(struct ata_port *ap,
1733 struct ata_queued_cmd *qc);
1734 extern irqreturn_t ata_bmdma_interrupt(int irq, void *dev_instance);
1735 extern void ata_bmdma_error_handler(struct ata_port *ap);
1736 extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc);
1737 extern void ata_bmdma_irq_clear(struct ata_port *ap);
1738 extern void ata_bmdma_setup(struct ata_queued_cmd *qc);
1739 extern void ata_bmdma_start(struct ata_queued_cmd *qc);
1740 extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
1741 extern u8 ata_bmdma_status(struct ata_port *ap);
1742 extern int ata_bmdma_port_start(struct ata_port *ap);
1743 extern int ata_bmdma_port_start32(struct ata_port *ap);
1744
1745 #ifdef CONFIG_PCI
1746 extern int ata_pci_bmdma_clear_simplex(struct pci_dev *pdev);
1747 extern void ata_pci_bmdma_init(struct ata_host *host);
1748 extern int ata_pci_bmdma_prepare_host(struct pci_dev *pdev,
1749 const struct ata_port_info * const * ppi,
1750 struct ata_host **r_host);
1751 extern int ata_pci_bmdma_init_one(struct pci_dev *pdev,
1752 const struct ata_port_info * const * ppi,
1753 struct scsi_host_template *sht,
1754 void *host_priv, int hflags);
1755 #endif /* CONFIG_PCI */
1756 #endif /* CONFIG_ATA_BMDMA */
1757
1758 /**
1759 * ata_sff_busy_wait - Wait for a port status register
1760 * @ap: Port to wait for.
1761 * @bits: bits that must be clear
1762 * @max: number of 10uS waits to perform
1763 *
1764 * Waits up to max*10 microseconds for the selected bits in the port's
1765 * status register to be cleared.
1766 * Returns final value of status register.
1767 *
1768 * LOCKING:
1769 * Inherited from caller.
1770 */
1771 static inline u8 ata_sff_busy_wait(struct ata_port *ap, unsigned int bits,
1772 unsigned int max)
1773 {
1774 u8 status;
1775
1776 do {
1777 udelay(10);
1778 status = ap->ops->sff_check_status(ap);
1779 max--;
1780 } while (status != 0xff && (status & bits) && (max > 0));
1781
1782 return status;
1783 }
1784
1785 /**
1786 * ata_wait_idle - Wait for a port to be idle.
1787 * @ap: Port to wait for.
1788 *
1789 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
1790 * Returns final value of status register.
1791 *
1792 * LOCKING:
1793 * Inherited from caller.
1794 */
1795 static inline u8 ata_wait_idle(struct ata_port *ap)
1796 {
1797 u8 status = ata_sff_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
1798
1799 #ifdef ATA_DEBUG
1800 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ)))
1801 ata_port_printk(ap, KERN_DEBUG, "abnormal Status 0x%X\n",
1802 status);
1803 #endif
1804
1805 return status;
1806 }
1807 #endif /* CONFIG_ATA_SFF */
1808
1809 #endif /* __LINUX_LIBATA_H__ */
Linux kernel - Deliverables
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