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Merge branches 'for-3.10/multitouch', 'for-3.10/roccat' and 'for-3.10/upstream' into...
[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 #ifdef CONFIG_SATA_ZPODD
624 void *zpodd;
625 #endif
626 struct device tdev;
627 /* n_sector is CLEAR_BEGIN, read comment above CLEAR_BEGIN */
628 u64 n_sectors; /* size of device, if ATA */
629 u64 n_native_sectors; /* native size, if ATA */
630 unsigned int class; /* ATA_DEV_xxx */
631 unsigned long unpark_deadline;
632
633 u8 pio_mode;
634 u8 dma_mode;
635 u8 xfer_mode;
636 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
637
638 unsigned int multi_count; /* sectors count for
639 READ/WRITE MULTIPLE */
640 unsigned int max_sectors; /* per-device max sectors */
641 unsigned int cdb_len;
642
643 /* per-dev xfer mask */
644 unsigned long pio_mask;
645 unsigned long mwdma_mask;
646 unsigned long udma_mask;
647
648 /* for CHS addressing */
649 u16 cylinders; /* Number of cylinders */
650 u16 heads; /* Number of heads */
651 u16 sectors; /* Number of sectors per track */
652
653 union {
654 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
655 u32 gscr[SATA_PMP_GSCR_DWORDS]; /* PMP GSCR block */
656 };
657
658 /* DEVSLP Timing Variables from Identify Device Data Log */
659 u8 devslp_timing[ATA_LOG_DEVSLP_SIZE];
660
661 /* error history */
662 int spdn_cnt;
663 /* ering is CLEAR_END, read comment above CLEAR_END */
664 struct ata_ering ering;
665 };
666
667 /* Fields between ATA_DEVICE_CLEAR_BEGIN and ATA_DEVICE_CLEAR_END are
668 * cleared to zero on ata_dev_init().
669 */
670 #define ATA_DEVICE_CLEAR_BEGIN offsetof(struct ata_device, n_sectors)
671 #define ATA_DEVICE_CLEAR_END offsetof(struct ata_device, ering)
672
673 struct ata_eh_info {
674 struct ata_device *dev; /* offending device */
675 u32 serror; /* SError from LLDD */
676 unsigned int err_mask; /* port-wide err_mask */
677 unsigned int action; /* ATA_EH_* action mask */
678 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */
679 unsigned int flags; /* ATA_EHI_* flags */
680
681 unsigned int probe_mask;
682
683 char desc[ATA_EH_DESC_LEN];
684 int desc_len;
685 };
686
687 struct ata_eh_context {
688 struct ata_eh_info i;
689 int tries[ATA_MAX_DEVICES];
690 int cmd_timeout_idx[ATA_MAX_DEVICES]
691 [ATA_EH_CMD_TIMEOUT_TABLE_SIZE];
692 unsigned int classes[ATA_MAX_DEVICES];
693 unsigned int did_probe_mask;
694 unsigned int unloaded_mask;
695 unsigned int saved_ncq_enabled;
696 u8 saved_xfer_mode[ATA_MAX_DEVICES];
697 /* timestamp for the last reset attempt or success */
698 unsigned long last_reset;
699 };
700
701 struct ata_acpi_drive
702 {
703 u32 pio;
704 u32 dma;
705 } __packed;
706
707 struct ata_acpi_gtm {
708 struct ata_acpi_drive drive[2];
709 u32 flags;
710 } __packed;
711
712 struct ata_link {
713 struct ata_port *ap;
714 int pmp; /* port multiplier port # */
715
716 struct device tdev;
717 unsigned int active_tag; /* active tag on this link */
718 u32 sactive; /* active NCQ commands */
719
720 unsigned int flags; /* ATA_LFLAG_xxx */
721
722 u32 saved_scontrol; /* SControl on probe */
723 unsigned int hw_sata_spd_limit;
724 unsigned int sata_spd_limit;
725 unsigned int sata_spd; /* current SATA PHY speed */
726 enum ata_lpm_policy lpm_policy;
727
728 /* record runtime error info, protected by host_set lock */
729 struct ata_eh_info eh_info;
730 /* EH context */
731 struct ata_eh_context eh_context;
732
733 struct ata_device device[ATA_MAX_DEVICES];
734 };
735 #define ATA_LINK_CLEAR_BEGIN offsetof(struct ata_link, active_tag)
736 #define ATA_LINK_CLEAR_END offsetof(struct ata_link, device[0])
737
738 struct ata_port {
739 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */
740 struct ata_port_operations *ops;
741 spinlock_t *lock;
742 /* Flags owned by the EH context. Only EH should touch these once the
743 port is active */
744 unsigned long flags; /* ATA_FLAG_xxx */
745 /* Flags that change dynamically, protected by ap->lock */
746 unsigned int pflags; /* ATA_PFLAG_xxx */
747 unsigned int print_id; /* user visible unique port ID */
748 unsigned int port_no; /* 0 based port no. inside the host */
749
750 #ifdef CONFIG_ATA_SFF
751 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
752 u8 ctl; /* cache of ATA control register */
753 u8 last_ctl; /* Cache last written value */
754 struct ata_link* sff_pio_task_link; /* link currently used */
755 struct delayed_work sff_pio_task;
756 #ifdef CONFIG_ATA_BMDMA
757 struct ata_bmdma_prd *bmdma_prd; /* BMDMA SG list */
758 dma_addr_t bmdma_prd_dma; /* and its DMA mapping */
759 #endif /* CONFIG_ATA_BMDMA */
760 #endif /* CONFIG_ATA_SFF */
761
762 unsigned int pio_mask;
763 unsigned int mwdma_mask;
764 unsigned int udma_mask;
765 unsigned int cbl; /* cable type; ATA_CBL_xxx */
766
767 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
768 unsigned long qc_allocated;
769 unsigned int qc_active;
770 int nr_active_links; /* #links with active qcs */
771
772 struct ata_link link; /* host default link */
773 struct ata_link *slave_link; /* see ata_slave_link_init() */
774
775 int nr_pmp_links; /* nr of available PMP links */
776 struct ata_link *pmp_link; /* array of PMP links */
777 struct ata_link *excl_link; /* for PMP qc exclusion */
778
779 struct ata_port_stats stats;
780 struct ata_host *host;
781 struct device *dev;
782 struct device tdev;
783
784 struct mutex scsi_scan_mutex;
785 struct delayed_work hotplug_task;
786 struct work_struct scsi_rescan_task;
787
788 unsigned int hsm_task_state;
789
790 u32 msg_enable;
791 struct list_head eh_done_q;
792 wait_queue_head_t eh_wait_q;
793 int eh_tries;
794 struct completion park_req_pending;
795
796 pm_message_t pm_mesg;
797 int *pm_result;
798 enum ata_lpm_policy target_lpm_policy;
799
800 struct timer_list fastdrain_timer;
801 unsigned long fastdrain_cnt;
802
803 int em_message_type;
804 void *private_data;
805
806 #ifdef CONFIG_ATA_ACPI
807 struct ata_acpi_gtm __acpi_init_gtm; /* use ata_acpi_init_gtm() */
808 #endif
809 /* owned by EH */
810 u8 sector_buf[ATA_SECT_SIZE] ____cacheline_aligned;
811 };
812
813 /* The following initializer overrides a method to NULL whether one of
814 * its parent has the method defined or not. This is equivalent to
815 * ERR_PTR(-ENOENT). Unfortunately, ERR_PTR doesn't render a constant
816 * expression and thus can't be used as an initializer.
817 */
818 #define ATA_OP_NULL (void *)(unsigned long)(-ENOENT)
819
820 struct ata_port_operations {
821 /*
822 * Command execution
823 */
824 int (*qc_defer)(struct ata_queued_cmd *qc);
825 int (*check_atapi_dma)(struct ata_queued_cmd *qc);
826 void (*qc_prep)(struct ata_queued_cmd *qc);
827 unsigned int (*qc_issue)(struct ata_queued_cmd *qc);
828 bool (*qc_fill_rtf)(struct ata_queued_cmd *qc);
829
830 /*
831 * Configuration and exception handling
832 */
833 int (*cable_detect)(struct ata_port *ap);
834 unsigned long (*mode_filter)(struct ata_device *dev, unsigned long xfer_mask);
835 void (*set_piomode)(struct ata_port *ap, struct ata_device *dev);
836 void (*set_dmamode)(struct ata_port *ap, struct ata_device *dev);
837 int (*set_mode)(struct ata_link *link, struct ata_device **r_failed_dev);
838 unsigned int (*read_id)(struct ata_device *dev, struct ata_taskfile *tf, u16 *id);
839
840 void (*dev_config)(struct ata_device *dev);
841
842 void (*freeze)(struct ata_port *ap);
843 void (*thaw)(struct ata_port *ap);
844 ata_prereset_fn_t prereset;
845 ata_reset_fn_t softreset;
846 ata_reset_fn_t hardreset;
847 ata_postreset_fn_t postreset;
848 ata_prereset_fn_t pmp_prereset;
849 ata_reset_fn_t pmp_softreset;
850 ata_reset_fn_t pmp_hardreset;
851 ata_postreset_fn_t pmp_postreset;
852 void (*error_handler)(struct ata_port *ap);
853 void (*lost_interrupt)(struct ata_port *ap);
854 void (*post_internal_cmd)(struct ata_queued_cmd *qc);
855 void (*sched_eh)(struct ata_port *ap);
856 void (*end_eh)(struct ata_port *ap);
857
858 /*
859 * Optional features
860 */
861 int (*scr_read)(struct ata_link *link, unsigned int sc_reg, u32 *val);
862 int (*scr_write)(struct ata_link *link, unsigned int sc_reg, u32 val);
863 void (*pmp_attach)(struct ata_port *ap);
864 void (*pmp_detach)(struct ata_port *ap);
865 int (*set_lpm)(struct ata_link *link, enum ata_lpm_policy policy,
866 unsigned hints);
867
868 /*
869 * Start, stop, suspend and resume
870 */
871 int (*port_suspend)(struct ata_port *ap, pm_message_t mesg);
872 int (*port_resume)(struct ata_port *ap);
873 int (*port_start)(struct ata_port *ap);
874 void (*port_stop)(struct ata_port *ap);
875 void (*host_stop)(struct ata_host *host);
876
877 #ifdef CONFIG_ATA_SFF
878 /*
879 * SFF / taskfile oriented ops
880 */
881 void (*sff_dev_select)(struct ata_port *ap, unsigned int device);
882 void (*sff_set_devctl)(struct ata_port *ap, u8 ctl);
883 u8 (*sff_check_status)(struct ata_port *ap);
884 u8 (*sff_check_altstatus)(struct ata_port *ap);
885 void (*sff_tf_load)(struct ata_port *ap, const struct ata_taskfile *tf);
886 void (*sff_tf_read)(struct ata_port *ap, struct ata_taskfile *tf);
887 void (*sff_exec_command)(struct ata_port *ap,
888 const struct ata_taskfile *tf);
889 unsigned int (*sff_data_xfer)(struct ata_device *dev,
890 unsigned char *buf, unsigned int buflen, int rw);
891 void (*sff_irq_on)(struct ata_port *);
892 bool (*sff_irq_check)(struct ata_port *);
893 void (*sff_irq_clear)(struct ata_port *);
894 void (*sff_drain_fifo)(struct ata_queued_cmd *qc);
895
896 #ifdef CONFIG_ATA_BMDMA
897 void (*bmdma_setup)(struct ata_queued_cmd *qc);
898 void (*bmdma_start)(struct ata_queued_cmd *qc);
899 void (*bmdma_stop)(struct ata_queued_cmd *qc);
900 u8 (*bmdma_status)(struct ata_port *ap);
901 #endif /* CONFIG_ATA_BMDMA */
902 #endif /* CONFIG_ATA_SFF */
903
904 ssize_t (*em_show)(struct ata_port *ap, char *buf);
905 ssize_t (*em_store)(struct ata_port *ap, const char *message,
906 size_t size);
907 ssize_t (*sw_activity_show)(struct ata_device *dev, char *buf);
908 ssize_t (*sw_activity_store)(struct ata_device *dev,
909 enum sw_activity val);
910 /*
911 * Obsolete
912 */
913 void (*phy_reset)(struct ata_port *ap);
914 void (*eng_timeout)(struct ata_port *ap);
915
916 /*
917 * ->inherits must be the last field and all the preceding
918 * fields must be pointers.
919 */
920 const struct ata_port_operations *inherits;
921 };
922
923 struct ata_port_info {
924 unsigned long flags;
925 unsigned long link_flags;
926 unsigned long pio_mask;
927 unsigned long mwdma_mask;
928 unsigned long udma_mask;
929 struct ata_port_operations *port_ops;
930 void *private_data;
931 };
932
933 struct ata_timing {
934 unsigned short mode; /* ATA mode */
935 unsigned short setup; /* t1 */
936 unsigned short act8b; /* t2 for 8-bit I/O */
937 unsigned short rec8b; /* t2i for 8-bit I/O */
938 unsigned short cyc8b; /* t0 for 8-bit I/O */
939 unsigned short active; /* t2 or tD */
940 unsigned short recover; /* t2i or tK */
941 unsigned short dmack_hold; /* tj */
942 unsigned short cycle; /* t0 */
943 unsigned short udma; /* t2CYCTYP/2 */
944 };
945
946 /*
947 * Core layer - drivers/ata/libata-core.c
948 */
949 extern const unsigned long sata_deb_timing_normal[];
950 extern const unsigned long sata_deb_timing_hotplug[];
951 extern const unsigned long sata_deb_timing_long[];
952
953 extern struct ata_port_operations ata_dummy_port_ops;
954 extern const struct ata_port_info ata_dummy_port_info;
955
956 static inline const unsigned long *
957 sata_ehc_deb_timing(struct ata_eh_context *ehc)
958 {
959 if (ehc->i.flags & ATA_EHI_HOTPLUGGED)
960 return sata_deb_timing_hotplug;
961 else
962 return sata_deb_timing_normal;
963 }
964
965 static inline int ata_port_is_dummy(struct ata_port *ap)
966 {
967 return ap->ops == &ata_dummy_port_ops;
968 }
969
970 extern int sata_set_spd(struct ata_link *link);
971 extern int ata_std_prereset(struct ata_link *link, unsigned long deadline);
972 extern int ata_wait_after_reset(struct ata_link *link, unsigned long deadline,
973 int (*check_ready)(struct ata_link *link));
974 extern int sata_link_debounce(struct ata_link *link,
975 const unsigned long *params, unsigned long deadline);
976 extern int sata_link_resume(struct ata_link *link, const unsigned long *params,
977 unsigned long deadline);
978 extern int sata_link_scr_lpm(struct ata_link *link, enum ata_lpm_policy policy,
979 bool spm_wakeup);
980 extern int sata_link_hardreset(struct ata_link *link,
981 const unsigned long *timing, unsigned long deadline,
982 bool *online, int (*check_ready)(struct ata_link *));
983 extern int sata_std_hardreset(struct ata_link *link, unsigned int *class,
984 unsigned long deadline);
985 extern void ata_std_postreset(struct ata_link *link, unsigned int *classes);
986
987 extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports);
988 extern struct ata_host *ata_host_alloc_pinfo(struct device *dev,
989 const struct ata_port_info * const * ppi, int n_ports);
990 extern int ata_slave_link_init(struct ata_port *ap);
991 extern int ata_host_start(struct ata_host *host);
992 extern int ata_host_register(struct ata_host *host,
993 struct scsi_host_template *sht);
994 extern int ata_host_activate(struct ata_host *host, int irq,
995 irq_handler_t irq_handler, unsigned long irq_flags,
996 struct scsi_host_template *sht);
997 extern void ata_host_detach(struct ata_host *host);
998 extern void ata_host_init(struct ata_host *, struct device *, struct ata_port_operations *);
999 extern int ata_scsi_detect(struct scsi_host_template *sht);
1000 extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
1001 extern int ata_scsi_queuecmd(struct Scsi_Host *h, struct scsi_cmnd *cmd);
1002 extern int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *dev,
1003 int cmd, void __user *arg);
1004 extern void ata_sas_port_destroy(struct ata_port *);
1005 extern struct ata_port *ata_sas_port_alloc(struct ata_host *,
1006 struct ata_port_info *, struct Scsi_Host *);
1007 extern void ata_sas_async_probe(struct ata_port *ap);
1008 extern int ata_sas_sync_probe(struct ata_port *ap);
1009 extern int ata_sas_port_init(struct ata_port *);
1010 extern int ata_sas_port_start(struct ata_port *ap);
1011 extern void ata_sas_port_stop(struct ata_port *ap);
1012 extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *);
1013 extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, struct ata_port *ap);
1014 extern int sata_scr_valid(struct ata_link *link);
1015 extern int sata_scr_read(struct ata_link *link, int reg, u32 *val);
1016 extern int sata_scr_write(struct ata_link *link, int reg, u32 val);
1017 extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val);
1018 extern bool ata_link_online(struct ata_link *link);
1019 extern bool ata_link_offline(struct ata_link *link);
1020 #ifdef CONFIG_PM
1021 extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg);
1022 extern void ata_host_resume(struct ata_host *host);
1023 extern int ata_sas_port_async_suspend(struct ata_port *ap, int *async);
1024 extern int ata_sas_port_async_resume(struct ata_port *ap, int *async);
1025 #else
1026 static inline int ata_sas_port_async_suspend(struct ata_port *ap, int *async)
1027 {
1028 return 0;
1029 }
1030 static inline int ata_sas_port_async_resume(struct ata_port *ap, int *async)
1031 {
1032 return 0;
1033 }
1034 #endif
1035 extern int ata_ratelimit(void);
1036 extern void ata_msleep(struct ata_port *ap, unsigned int msecs);
1037 extern u32 ata_wait_register(struct ata_port *ap, void __iomem *reg, u32 mask,
1038 u32 val, unsigned long interval, unsigned long timeout);
1039 extern int atapi_cmd_type(u8 opcode);
1040 extern void ata_tf_to_fis(const struct ata_taskfile *tf,
1041 u8 pmp, int is_cmd, u8 *fis);
1042 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
1043 extern unsigned long ata_pack_xfermask(unsigned long pio_mask,
1044 unsigned long mwdma_mask, unsigned long udma_mask);
1045 extern void ata_unpack_xfermask(unsigned long xfer_mask,
1046 unsigned long *pio_mask, unsigned long *mwdma_mask,
1047 unsigned long *udma_mask);
1048 extern u8 ata_xfer_mask2mode(unsigned long xfer_mask);
1049 extern unsigned long ata_xfer_mode2mask(u8 xfer_mode);
1050 extern int ata_xfer_mode2shift(unsigned long xfer_mode);
1051 extern const char *ata_mode_string(unsigned long xfer_mask);
1052 extern unsigned long ata_id_xfermask(const u16 *id);
1053 extern int ata_std_qc_defer(struct ata_queued_cmd *qc);
1054 extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
1055 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
1056 unsigned int n_elem);
1057 extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
1058 extern void ata_dev_disable(struct ata_device *adev);
1059 extern void ata_id_string(const u16 *id, unsigned char *s,
1060 unsigned int ofs, unsigned int len);
1061 extern void ata_id_c_string(const u16 *id, unsigned char *s,
1062 unsigned int ofs, unsigned int len);
1063 extern unsigned int ata_do_dev_read_id(struct ata_device *dev,
1064 struct ata_taskfile *tf, u16 *id);
1065 extern void ata_qc_complete(struct ata_queued_cmd *qc);
1066 extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active);
1067 extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd);
1068 extern int ata_std_bios_param(struct scsi_device *sdev,
1069 struct block_device *bdev,
1070 sector_t capacity, int geom[]);
1071 extern void ata_scsi_unlock_native_capacity(struct scsi_device *sdev);
1072 extern int ata_scsi_slave_config(struct scsi_device *sdev);
1073 extern void ata_scsi_slave_destroy(struct scsi_device *sdev);
1074 extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
1075 int queue_depth, int reason);
1076 extern int __ata_change_queue_depth(struct ata_port *ap, struct scsi_device *sdev,
1077 int queue_depth, int reason);
1078 extern struct ata_device *ata_dev_pair(struct ata_device *adev);
1079 extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev);
1080 extern void ata_scsi_port_error_handler(struct Scsi_Host *host, struct ata_port *ap);
1081 extern void ata_scsi_cmd_error_handler(struct Scsi_Host *host, struct ata_port *ap, struct list_head *eh_q);
1082
1083 extern int ata_cable_40wire(struct ata_port *ap);
1084 extern int ata_cable_80wire(struct ata_port *ap);
1085 extern int ata_cable_sata(struct ata_port *ap);
1086 extern int ata_cable_ignore(struct ata_port *ap);
1087 extern int ata_cable_unknown(struct ata_port *ap);
1088
1089 /* Timing helpers */
1090 extern unsigned int ata_pio_need_iordy(const struct ata_device *);
1091 extern const struct ata_timing *ata_timing_find_mode(u8 xfer_mode);
1092 extern int ata_timing_compute(struct ata_device *, unsigned short,
1093 struct ata_timing *, int, int);
1094 extern void ata_timing_merge(const struct ata_timing *,
1095 const struct ata_timing *, struct ata_timing *,
1096 unsigned int);
1097 extern u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle);
1098
1099 /* PCI */
1100 #ifdef CONFIG_PCI
1101 struct pci_dev;
1102
1103 struct pci_bits {
1104 unsigned int reg; /* PCI config register to read */
1105 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
1106 unsigned long mask;
1107 unsigned long val;
1108 };
1109
1110 extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
1111 extern void ata_pci_remove_one(struct pci_dev *pdev);
1112
1113 #ifdef CONFIG_PM
1114 extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg);
1115 extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev);
1116 extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
1117 extern int ata_pci_device_resume(struct pci_dev *pdev);
1118 #endif /* CONFIG_PM */
1119 #endif /* CONFIG_PCI */
1120
1121 struct platform_device;
1122
1123 extern int ata_platform_remove_one(struct platform_device *pdev);
1124
1125 /*
1126 * ACPI - drivers/ata/libata-acpi.c
1127 */
1128 #ifdef CONFIG_ATA_ACPI
1129 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
1130 {
1131 if (ap->pflags & ATA_PFLAG_INIT_GTM_VALID)
1132 return &ap->__acpi_init_gtm;
1133 return NULL;
1134 }
1135 int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm);
1136 int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *stm);
1137 unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev,
1138 const struct ata_acpi_gtm *gtm);
1139 acpi_handle ata_ap_acpi_handle(struct ata_port *ap);
1140 acpi_handle ata_dev_acpi_handle(struct ata_device *dev);
1141 int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm);
1142 #else
1143 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
1144 {
1145 return NULL;
1146 }
1147
1148 static inline int ata_acpi_stm(const struct ata_port *ap,
1149 struct ata_acpi_gtm *stm)
1150 {
1151 return -ENOSYS;
1152 }
1153
1154 static inline int ata_acpi_gtm(const struct ata_port *ap,
1155 struct ata_acpi_gtm *stm)
1156 {
1157 return -ENOSYS;
1158 }
1159
1160 static inline unsigned int ata_acpi_gtm_xfermask(struct ata_device *dev,
1161 const struct ata_acpi_gtm *gtm)
1162 {
1163 return 0;
1164 }
1165
1166 static inline int ata_acpi_cbl_80wire(struct ata_port *ap,
1167 const struct ata_acpi_gtm *gtm)
1168 {
1169 return 0;
1170 }
1171 #endif
1172
1173 /*
1174 * EH - drivers/ata/libata-eh.c
1175 */
1176 extern void ata_port_schedule_eh(struct ata_port *ap);
1177 extern void ata_port_wait_eh(struct ata_port *ap);
1178 extern int ata_link_abort(struct ata_link *link);
1179 extern int ata_port_abort(struct ata_port *ap);
1180 extern int ata_port_freeze(struct ata_port *ap);
1181 extern int sata_async_notification(struct ata_port *ap);
1182
1183 extern void ata_eh_freeze_port(struct ata_port *ap);
1184 extern void ata_eh_thaw_port(struct ata_port *ap);
1185
1186 extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
1187 extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
1188 extern void ata_eh_analyze_ncq_error(struct ata_link *link);
1189
1190 extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
1191 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
1192 ata_postreset_fn_t postreset);
1193 extern void ata_std_error_handler(struct ata_port *ap);
1194 extern void ata_std_sched_eh(struct ata_port *ap);
1195 extern void ata_std_end_eh(struct ata_port *ap);
1196 extern int ata_link_nr_enabled(struct ata_link *link);
1197
1198 /*
1199 * Base operations to inherit from and initializers for sht
1200 *
1201 * Operations
1202 *
1203 * base : Common to all libata drivers.
1204 * sata : SATA controllers w/ native interface.
1205 * pmp : SATA controllers w/ PMP support.
1206 * sff : SFF ATA controllers w/o BMDMA support.
1207 * bmdma : SFF ATA controllers w/ BMDMA support.
1208 *
1209 * sht initializers
1210 *
1211 * BASE : Common to all libata drivers. The user must set
1212 * sg_tablesize and dma_boundary.
1213 * PIO : SFF ATA controllers w/ only PIO support.
1214 * BMDMA : SFF ATA controllers w/ BMDMA support. sg_tablesize and
1215 * dma_boundary are set to BMDMA limits.
1216 * NCQ : SATA controllers supporting NCQ. The user must set
1217 * sg_tablesize, dma_boundary and can_queue.
1218 */
1219 extern const struct ata_port_operations ata_base_port_ops;
1220 extern const struct ata_port_operations sata_port_ops;
1221 extern struct device_attribute *ata_common_sdev_attrs[];
1222
1223 #define ATA_BASE_SHT(drv_name) \
1224 .module = THIS_MODULE, \
1225 .name = drv_name, \
1226 .ioctl = ata_scsi_ioctl, \
1227 .queuecommand = ata_scsi_queuecmd, \
1228 .can_queue = ATA_DEF_QUEUE, \
1229 .this_id = ATA_SHT_THIS_ID, \
1230 .cmd_per_lun = ATA_SHT_CMD_PER_LUN, \
1231 .emulated = ATA_SHT_EMULATED, \
1232 .use_clustering = ATA_SHT_USE_CLUSTERING, \
1233 .proc_name = drv_name, \
1234 .slave_configure = ata_scsi_slave_config, \
1235 .slave_destroy = ata_scsi_slave_destroy, \
1236 .bios_param = ata_std_bios_param, \
1237 .unlock_native_capacity = ata_scsi_unlock_native_capacity, \
1238 .sdev_attrs = ata_common_sdev_attrs
1239
1240 #define ATA_NCQ_SHT(drv_name) \
1241 ATA_BASE_SHT(drv_name), \
1242 .change_queue_depth = ata_scsi_change_queue_depth
1243
1244 /*
1245 * PMP helpers
1246 */
1247 #ifdef CONFIG_SATA_PMP
1248 static inline bool sata_pmp_supported(struct ata_port *ap)
1249 {
1250 return ap->flags & ATA_FLAG_PMP;
1251 }
1252
1253 static inline bool sata_pmp_attached(struct ata_port *ap)
1254 {
1255 return ap->nr_pmp_links != 0;
1256 }
1257
1258 static inline int ata_is_host_link(const struct ata_link *link)
1259 {
1260 return link == &link->ap->link || link == link->ap->slave_link;
1261 }
1262 #else /* CONFIG_SATA_PMP */
1263 static inline bool sata_pmp_supported(struct ata_port *ap)
1264 {
1265 return false;
1266 }
1267
1268 static inline bool sata_pmp_attached(struct ata_port *ap)
1269 {
1270 return false;
1271 }
1272
1273 static inline int ata_is_host_link(const struct ata_link *link)
1274 {
1275 return 1;
1276 }
1277 #endif /* CONFIG_SATA_PMP */
1278
1279 static inline int sata_srst_pmp(struct ata_link *link)
1280 {
1281 if (sata_pmp_supported(link->ap) && ata_is_host_link(link))
1282 return SATA_PMP_CTRL_PORT;
1283 return link->pmp;
1284 }
1285
1286 /*
1287 * printk helpers
1288 */
1289 __printf(3, 4)
1290 int ata_port_printk(const struct ata_port *ap, const char *level,
1291 const char *fmt, ...);
1292 __printf(3, 4)
1293 int ata_link_printk(const struct ata_link *link, const char *level,
1294 const char *fmt, ...);
1295 __printf(3, 4)
1296 int ata_dev_printk(const struct ata_device *dev, const char *level,
1297 const char *fmt, ...);
1298
1299 #define ata_port_err(ap, fmt, ...) \
1300 ata_port_printk(ap, KERN_ERR, fmt, ##__VA_ARGS__)
1301 #define ata_port_warn(ap, fmt, ...) \
1302 ata_port_printk(ap, KERN_WARNING, fmt, ##__VA_ARGS__)
1303 #define ata_port_notice(ap, fmt, ...) \
1304 ata_port_printk(ap, KERN_NOTICE, fmt, ##__VA_ARGS__)
1305 #define ata_port_info(ap, fmt, ...) \
1306 ata_port_printk(ap, KERN_INFO, fmt, ##__VA_ARGS__)
1307 #define ata_port_dbg(ap, fmt, ...) \
1308 ata_port_printk(ap, KERN_DEBUG, fmt, ##__VA_ARGS__)
1309
1310 #define ata_link_err(link, fmt, ...) \
1311 ata_link_printk(link, KERN_ERR, fmt, ##__VA_ARGS__)
1312 #define ata_link_warn(link, fmt, ...) \
1313 ata_link_printk(link, KERN_WARNING, fmt, ##__VA_ARGS__)
1314 #define ata_link_notice(link, fmt, ...) \
1315 ata_link_printk(link, KERN_NOTICE, fmt, ##__VA_ARGS__)
1316 #define ata_link_info(link, fmt, ...) \
1317 ata_link_printk(link, KERN_INFO, fmt, ##__VA_ARGS__)
1318 #define ata_link_dbg(link, fmt, ...) \
1319 ata_link_printk(link, KERN_DEBUG, fmt, ##__VA_ARGS__)
1320
1321 #define ata_dev_err(dev, fmt, ...) \
1322 ata_dev_printk(dev, KERN_ERR, fmt, ##__VA_ARGS__)
1323 #define ata_dev_warn(dev, fmt, ...) \
1324 ata_dev_printk(dev, KERN_WARNING, fmt, ##__VA_ARGS__)
1325 #define ata_dev_notice(dev, fmt, ...) \
1326 ata_dev_printk(dev, KERN_NOTICE, fmt, ##__VA_ARGS__)
1327 #define ata_dev_info(dev, fmt, ...) \
1328 ata_dev_printk(dev, KERN_INFO, fmt, ##__VA_ARGS__)
1329 #define ata_dev_dbg(dev, fmt, ...) \
1330 ata_dev_printk(dev, KERN_DEBUG, fmt, ##__VA_ARGS__)
1331
1332 void ata_print_version(const struct device *dev, const char *version);
1333
1334 /*
1335 * ata_eh_info helpers
1336 */
1337 extern __printf(2, 3)
1338 void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...);
1339 extern __printf(2, 3)
1340 void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...);
1341 extern void ata_ehi_clear_desc(struct ata_eh_info *ehi);
1342
1343 static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
1344 {
1345 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
1346 ehi->flags |= ATA_EHI_HOTPLUGGED;
1347 ehi->action |= ATA_EH_RESET | ATA_EH_ENABLE_LINK;
1348 ehi->err_mask |= AC_ERR_ATA_BUS;
1349 }
1350
1351 /*
1352 * port description helpers
1353 */
1354 extern __printf(2, 3)
1355 void ata_port_desc(struct ata_port *ap, const char *fmt, ...);
1356 #ifdef CONFIG_PCI
1357 extern void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset,
1358 const char *name);
1359 #endif
1360
1361 static inline unsigned int ata_tag_valid(unsigned int tag)
1362 {
1363 return (tag < ATA_MAX_QUEUE) ? 1 : 0;
1364 }
1365
1366 static inline unsigned int ata_tag_internal(unsigned int tag)
1367 {
1368 return tag == ATA_TAG_INTERNAL;
1369 }
1370
1371 /*
1372 * device helpers
1373 */
1374 static inline unsigned int ata_class_enabled(unsigned int class)
1375 {
1376 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI ||
1377 class == ATA_DEV_PMP || class == ATA_DEV_SEMB;
1378 }
1379
1380 static inline unsigned int ata_class_disabled(unsigned int class)
1381 {
1382 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP ||
1383 class == ATA_DEV_PMP_UNSUP || class == ATA_DEV_SEMB_UNSUP;
1384 }
1385
1386 static inline unsigned int ata_class_absent(unsigned int class)
1387 {
1388 return !ata_class_enabled(class) && !ata_class_disabled(class);
1389 }
1390
1391 static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
1392 {
1393 return ata_class_enabled(dev->class);
1394 }
1395
1396 static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
1397 {
1398 return ata_class_disabled(dev->class);
1399 }
1400
1401 static inline unsigned int ata_dev_absent(const struct ata_device *dev)
1402 {
1403 return ata_class_absent(dev->class);
1404 }
1405
1406 /*
1407 * link helpers
1408 */
1409 static inline int ata_link_max_devices(const struct ata_link *link)
1410 {
1411 if (ata_is_host_link(link) && link->ap->flags & ATA_FLAG_SLAVE_POSS)
1412 return 2;
1413 return 1;
1414 }
1415
1416 static inline int ata_link_active(struct ata_link *link)
1417 {
1418 return ata_tag_valid(link->active_tag) || link->sactive;
1419 }
1420
1421 /*
1422 * Iterators
1423 *
1424 * ATA_LITER_* constants are used to select link iteration mode and
1425 * ATA_DITER_* device iteration mode.
1426 *
1427 * For a custom iteration directly using ata_{link|dev}_next(), if
1428 * @link or @dev, respectively, is NULL, the first element is
1429 * returned. @dev and @link can be any valid device or link and the
1430 * next element according to the iteration mode will be returned.
1431 * After the last element, NULL is returned.
1432 */
1433 enum ata_link_iter_mode {
1434 ATA_LITER_EDGE, /* if present, PMP links only; otherwise,
1435 * host link. no slave link */
1436 ATA_LITER_HOST_FIRST, /* host link followed by PMP or slave links */
1437 ATA_LITER_PMP_FIRST, /* PMP links followed by host link,
1438 * slave link still comes after host link */
1439 };
1440
1441 enum ata_dev_iter_mode {
1442 ATA_DITER_ENABLED,
1443 ATA_DITER_ENABLED_REVERSE,
1444 ATA_DITER_ALL,
1445 ATA_DITER_ALL_REVERSE,
1446 };
1447
1448 extern struct ata_link *ata_link_next(struct ata_link *link,
1449 struct ata_port *ap,
1450 enum ata_link_iter_mode mode);
1451
1452 extern struct ata_device *ata_dev_next(struct ata_device *dev,
1453 struct ata_link *link,
1454 enum ata_dev_iter_mode mode);
1455
1456 /*
1457 * Shortcut notation for iterations
1458 *
1459 * ata_for_each_link() iterates over each link of @ap according to
1460 * @mode. @link points to the current link in the loop. @link is
1461 * NULL after loop termination. ata_for_each_dev() works the same way
1462 * except that it iterates over each device of @link.
1463 *
1464 * Note that the mode prefixes ATA_{L|D}ITER_ shouldn't need to be
1465 * specified when using the following shorthand notations. Only the
1466 * mode itself (EDGE, HOST_FIRST, ENABLED, etc...) should be
1467 * specified. This not only increases brevity but also makes it
1468 * impossible to use ATA_LITER_* for device iteration or vice-versa.
1469 */
1470 #define ata_for_each_link(link, ap, mode) \
1471 for ((link) = ata_link_next(NULL, (ap), ATA_LITER_##mode); (link); \
1472 (link) = ata_link_next((link), (ap), ATA_LITER_##mode))
1473
1474 #define ata_for_each_dev(dev, link, mode) \
1475 for ((dev) = ata_dev_next(NULL, (link), ATA_DITER_##mode); (dev); \
1476 (dev) = ata_dev_next((dev), (link), ATA_DITER_##mode))
1477
1478 /**
1479 * ata_ncq_enabled - Test whether NCQ is enabled
1480 * @dev: ATA device to test for
1481 *
1482 * LOCKING:
1483 * spin_lock_irqsave(host lock)
1484 *
1485 * RETURNS:
1486 * 1 if NCQ is enabled for @dev, 0 otherwise.
1487 */
1488 static inline int ata_ncq_enabled(struct ata_device *dev)
1489 {
1490 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF |
1491 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ;
1492 }
1493
1494 static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
1495 {
1496 qc->tf.ctl |= ATA_NIEN;
1497 }
1498
1499 static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap,
1500 unsigned int tag)
1501 {
1502 if (likely(ata_tag_valid(tag)))
1503 return &ap->qcmd[tag];
1504 return NULL;
1505 }
1506
1507 static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap,
1508 unsigned int tag)
1509 {
1510 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
1511
1512 if (unlikely(!qc) || !ap->ops->error_handler)
1513 return qc;
1514
1515 if ((qc->flags & (ATA_QCFLAG_ACTIVE |
1516 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE)
1517 return qc;
1518
1519 return NULL;
1520 }
1521
1522 static inline unsigned int ata_qc_raw_nbytes(struct ata_queued_cmd *qc)
1523 {
1524 return qc->nbytes - min(qc->extrabytes, qc->nbytes);
1525 }
1526
1527 static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
1528 {
1529 memset(tf, 0, sizeof(*tf));
1530
1531 #ifdef CONFIG_ATA_SFF
1532 tf->ctl = dev->link->ap->ctl;
1533 #else
1534 tf->ctl = ATA_DEVCTL_OBS;
1535 #endif
1536 if (dev->devno == 0)
1537 tf->device = ATA_DEVICE_OBS;
1538 else
1539 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
1540 }
1541
1542 static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
1543 {
1544 qc->dma_dir = DMA_NONE;
1545 qc->sg = NULL;
1546 qc->flags = 0;
1547 qc->cursg = NULL;
1548 qc->cursg_ofs = 0;
1549 qc->nbytes = qc->extrabytes = qc->curbytes = 0;
1550 qc->n_elem = 0;
1551 qc->err_mask = 0;
1552 qc->sect_size = ATA_SECT_SIZE;
1553
1554 ata_tf_init(qc->dev, &qc->tf);
1555
1556 /* init result_tf such that it indicates normal completion */
1557 qc->result_tf.command = ATA_DRDY;
1558 qc->result_tf.feature = 0;
1559 }
1560
1561 static inline int ata_try_flush_cache(const struct ata_device *dev)
1562 {
1563 return ata_id_wcache_enabled(dev->id) ||
1564 ata_id_has_flush(dev->id) ||
1565 ata_id_has_flush_ext(dev->id);
1566 }
1567
1568 static inline unsigned int ac_err_mask(u8 status)
1569 {
1570 if (status & (ATA_BUSY | ATA_DRQ))
1571 return AC_ERR_HSM;
1572 if (status & (ATA_ERR | ATA_DF))
1573 return AC_ERR_DEV;
1574 return 0;
1575 }
1576
1577 static inline unsigned int __ac_err_mask(u8 status)
1578 {
1579 unsigned int mask = ac_err_mask(status);
1580 if (mask == 0)
1581 return AC_ERR_OTHER;
1582 return mask;
1583 }
1584
1585 static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
1586 {
1587 return *(struct ata_port **)&host->hostdata[0];
1588 }
1589
1590 static inline int ata_check_ready(u8 status)
1591 {
1592 if (!(status & ATA_BUSY))
1593 return 1;
1594
1595 /* 0xff indicates either no device or device not ready */
1596 if (status == 0xff)
1597 return -ENODEV;
1598
1599 return 0;
1600 }
1601
1602 static inline unsigned long ata_deadline(unsigned long from_jiffies,
1603 unsigned long timeout_msecs)
1604 {
1605 return from_jiffies + msecs_to_jiffies(timeout_msecs);
1606 }
1607
1608 /* Don't open code these in drivers as there are traps. Firstly the range may
1609 change in future hardware and specs, secondly 0xFF means 'no DMA' but is
1610 > UDMA_0. Dyma ddreigiau */
1611
1612 static inline int ata_using_mwdma(struct ata_device *adev)
1613 {
1614 if (adev->dma_mode >= XFER_MW_DMA_0 && adev->dma_mode <= XFER_MW_DMA_4)
1615 return 1;
1616 return 0;
1617 }
1618
1619 static inline int ata_using_udma(struct ata_device *adev)
1620 {
1621 if (adev->dma_mode >= XFER_UDMA_0 && adev->dma_mode <= XFER_UDMA_7)
1622 return 1;
1623 return 0;
1624 }
1625
1626 static inline int ata_dma_enabled(struct ata_device *adev)
1627 {
1628 return (adev->dma_mode == 0xFF ? 0 : 1);
1629 }
1630
1631 /**************************************************************************
1632 * PMP - drivers/ata/libata-pmp.c
1633 */
1634 #ifdef CONFIG_SATA_PMP
1635
1636 extern const struct ata_port_operations sata_pmp_port_ops;
1637
1638 extern int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc);
1639 extern void sata_pmp_error_handler(struct ata_port *ap);
1640
1641 #else /* CONFIG_SATA_PMP */
1642
1643 #define sata_pmp_port_ops sata_port_ops
1644 #define sata_pmp_qc_defer_cmd_switch ata_std_qc_defer
1645 #define sata_pmp_error_handler ata_std_error_handler
1646
1647 #endif /* CONFIG_SATA_PMP */
1648
1649
1650 /**************************************************************************
1651 * SFF - drivers/ata/libata-sff.c
1652 */
1653 #ifdef CONFIG_ATA_SFF
1654
1655 extern const struct ata_port_operations ata_sff_port_ops;
1656 extern const struct ata_port_operations ata_bmdma32_port_ops;
1657
1658 /* PIO only, sg_tablesize and dma_boundary limits can be removed */
1659 #define ATA_PIO_SHT(drv_name) \
1660 ATA_BASE_SHT(drv_name), \
1661 .sg_tablesize = LIBATA_MAX_PRD, \
1662 .dma_boundary = ATA_DMA_BOUNDARY
1663
1664 extern void ata_sff_dev_select(struct ata_port *ap, unsigned int device);
1665 extern u8 ata_sff_check_status(struct ata_port *ap);
1666 extern void ata_sff_pause(struct ata_port *ap);
1667 extern void ata_sff_dma_pause(struct ata_port *ap);
1668 extern int ata_sff_busy_sleep(struct ata_port *ap,
1669 unsigned long timeout_pat, unsigned long timeout);
1670 extern int ata_sff_wait_ready(struct ata_link *link, unsigned long deadline);
1671 extern void ata_sff_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
1672 extern void ata_sff_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
1673 extern void ata_sff_exec_command(struct ata_port *ap,
1674 const struct ata_taskfile *tf);
1675 extern unsigned int ata_sff_data_xfer(struct ata_device *dev,
1676 unsigned char *buf, unsigned int buflen, int rw);
1677 extern unsigned int ata_sff_data_xfer32(struct ata_device *dev,
1678 unsigned char *buf, unsigned int buflen, int rw);
1679 extern unsigned int ata_sff_data_xfer_noirq(struct ata_device *dev,
1680 unsigned char *buf, unsigned int buflen, int rw);
1681 extern void ata_sff_irq_on(struct ata_port *ap);
1682 extern void ata_sff_irq_clear(struct ata_port *ap);
1683 extern int ata_sff_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
1684 u8 status, int in_wq);
1685 extern void ata_sff_queue_work(struct work_struct *work);
1686 extern void ata_sff_queue_delayed_work(struct delayed_work *dwork,
1687 unsigned long delay);
1688 extern void ata_sff_queue_pio_task(struct ata_link *link, unsigned long delay);
1689 extern unsigned int ata_sff_qc_issue(struct ata_queued_cmd *qc);
1690 extern bool ata_sff_qc_fill_rtf(struct ata_queued_cmd *qc);
1691 extern unsigned int ata_sff_port_intr(struct ata_port *ap,
1692 struct ata_queued_cmd *qc);
1693 extern irqreturn_t ata_sff_interrupt(int irq, void *dev_instance);
1694 extern void ata_sff_lost_interrupt(struct ata_port *ap);
1695 extern void ata_sff_freeze(struct ata_port *ap);
1696 extern void ata_sff_thaw(struct ata_port *ap);
1697 extern int ata_sff_prereset(struct ata_link *link, unsigned long deadline);
1698 extern unsigned int ata_sff_dev_classify(struct ata_device *dev, int present,
1699 u8 *r_err);
1700 extern int ata_sff_wait_after_reset(struct ata_link *link, unsigned int devmask,
1701 unsigned long deadline);
1702 extern int ata_sff_softreset(struct ata_link *link, unsigned int *classes,
1703 unsigned long deadline);
1704 extern int sata_sff_hardreset(struct ata_link *link, unsigned int *class,
1705 unsigned long deadline);
1706 extern void ata_sff_postreset(struct ata_link *link, unsigned int *classes);
1707 extern void ata_sff_drain_fifo(struct ata_queued_cmd *qc);
1708 extern void ata_sff_error_handler(struct ata_port *ap);
1709 extern void ata_sff_std_ports(struct ata_ioports *ioaddr);
1710 #ifdef CONFIG_PCI
1711 extern int ata_pci_sff_init_host(struct ata_host *host);
1712 extern int ata_pci_sff_prepare_host(struct pci_dev *pdev,
1713 const struct ata_port_info * const * ppi,
1714 struct ata_host **r_host);
1715 extern int ata_pci_sff_activate_host(struct ata_host *host,
1716 irq_handler_t irq_handler,
1717 struct scsi_host_template *sht);
1718 extern int ata_pci_sff_init_one(struct pci_dev *pdev,
1719 const struct ata_port_info * const * ppi,
1720 struct scsi_host_template *sht, void *host_priv, int hflags);
1721 #endif /* CONFIG_PCI */
1722
1723 #ifdef CONFIG_ATA_BMDMA
1724
1725 extern const struct ata_port_operations ata_bmdma_port_ops;
1726
1727 #define ATA_BMDMA_SHT(drv_name) \
1728 ATA_BASE_SHT(drv_name), \
1729 .sg_tablesize = LIBATA_MAX_PRD, \
1730 .dma_boundary = ATA_DMA_BOUNDARY
1731
1732 extern void ata_bmdma_qc_prep(struct ata_queued_cmd *qc);
1733 extern unsigned int ata_bmdma_qc_issue(struct ata_queued_cmd *qc);
1734 extern void ata_bmdma_dumb_qc_prep(struct ata_queued_cmd *qc);
1735 extern unsigned int ata_bmdma_port_intr(struct ata_port *ap,
1736 struct ata_queued_cmd *qc);
1737 extern irqreturn_t ata_bmdma_interrupt(int irq, void *dev_instance);
1738 extern void ata_bmdma_error_handler(struct ata_port *ap);
1739 extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc);
1740 extern void ata_bmdma_irq_clear(struct ata_port *ap);
1741 extern void ata_bmdma_setup(struct ata_queued_cmd *qc);
1742 extern void ata_bmdma_start(struct ata_queued_cmd *qc);
1743 extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
1744 extern u8 ata_bmdma_status(struct ata_port *ap);
1745 extern int ata_bmdma_port_start(struct ata_port *ap);
1746 extern int ata_bmdma_port_start32(struct ata_port *ap);
1747
1748 #ifdef CONFIG_PCI
1749 extern int ata_pci_bmdma_clear_simplex(struct pci_dev *pdev);
1750 extern void ata_pci_bmdma_init(struct ata_host *host);
1751 extern int ata_pci_bmdma_prepare_host(struct pci_dev *pdev,
1752 const struct ata_port_info * const * ppi,
1753 struct ata_host **r_host);
1754 extern int ata_pci_bmdma_init_one(struct pci_dev *pdev,
1755 const struct ata_port_info * const * ppi,
1756 struct scsi_host_template *sht,
1757 void *host_priv, int hflags);
1758 #endif /* CONFIG_PCI */
1759 #endif /* CONFIG_ATA_BMDMA */
1760
1761 /**
1762 * ata_sff_busy_wait - Wait for a port status register
1763 * @ap: Port to wait for.
1764 * @bits: bits that must be clear
1765 * @max: number of 10uS waits to perform
1766 *
1767 * Waits up to max*10 microseconds for the selected bits in the port's
1768 * status register to be cleared.
1769 * Returns final value of status register.
1770 *
1771 * LOCKING:
1772 * Inherited from caller.
1773 */
1774 static inline u8 ata_sff_busy_wait(struct ata_port *ap, unsigned int bits,
1775 unsigned int max)
1776 {
1777 u8 status;
1778
1779 do {
1780 udelay(10);
1781 status = ap->ops->sff_check_status(ap);
1782 max--;
1783 } while (status != 0xff && (status & bits) && (max > 0));
1784
1785 return status;
1786 }
1787
1788 /**
1789 * ata_wait_idle - Wait for a port to be idle.
1790 * @ap: Port to wait for.
1791 *
1792 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
1793 * Returns final value of status register.
1794 *
1795 * LOCKING:
1796 * Inherited from caller.
1797 */
1798 static inline u8 ata_wait_idle(struct ata_port *ap)
1799 {
1800 u8 status = ata_sff_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
1801
1802 #ifdef ATA_DEBUG
1803 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ)))
1804 ata_port_printk(ap, KERN_DEBUG, "abnormal Status 0x%X\n",
1805 status);
1806 #endif
1807
1808 return status;
1809 }
1810 #endif /* CONFIG_ATA_SFF */
1811
1812 #endif /* __LINUX_LIBATA_H__ */
Linux kernel - Deliverables
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