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/driver-api/libata.rst
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 #include <linux/async.h>
42
43 /*
44 * Define if arch has non-standard setup. This is a _PCI_ standard
45 * not a legacy or ISA standard.
46 */
47 #ifdef CONFIG_ATA_NONSTANDARD
48 #include <asm/libata-portmap.h>
49 #else
50 #define ATA_PRIMARY_IRQ(dev) 14
51 #define ATA_SECONDARY_IRQ(dev) 15
52 #endif
53
54 /*
55 * compile-time options: to be removed as soon as all the drivers are
56 * converted to the new debugging mechanism
57 */
58 #undef ATA_DEBUG /* debugging output */
59 #undef ATA_VERBOSE_DEBUG /* yet more debugging output */
60 #undef ATA_IRQ_TRAP /* define to ack screaming irqs */
61 #undef ATA_NDEBUG /* define to disable quick runtime checks */
62
63
64 /* note: prints function name for you */
65 #ifdef ATA_DEBUG
66 #define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args)
67 #ifdef ATA_VERBOSE_DEBUG
68 #define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args)
69 #else
70 #define VPRINTK(fmt, args...)
71 #endif /* ATA_VERBOSE_DEBUG */
72 #else
73 #define DPRINTK(fmt, args...)
74 #define VPRINTK(fmt, args...)
75 #endif /* ATA_DEBUG */
76
77 #define BPRINTK(fmt, args...) if (ap->flags & ATA_FLAG_DEBUGMSG) printk(KERN_ERR "%s: " fmt, __func__, ## args)
78
79 #define ata_print_version_once(dev, version) \
80 ({ \
81 static bool __print_once; \
82 \
83 if (!__print_once) { \
84 __print_once = true; \
85 ata_print_version(dev, version); \
86 } \
87 })
88
89 /* NEW: debug levels */
90 #define HAVE_LIBATA_MSG 1
91
92 enum {
93 ATA_MSG_DRV = 0x0001,
94 ATA_MSG_INFO = 0x0002,
95 ATA_MSG_PROBE = 0x0004,
96 ATA_MSG_WARN = 0x0008,
97 ATA_MSG_MALLOC = 0x0010,
98 ATA_MSG_CTL = 0x0020,
99 ATA_MSG_INTR = 0x0040,
100 ATA_MSG_ERR = 0x0080,
101 };
102
103 #define ata_msg_drv(p) ((p)->msg_enable & ATA_MSG_DRV)
104 #define ata_msg_info(p) ((p)->msg_enable & ATA_MSG_INFO)
105 #define ata_msg_probe(p) ((p)->msg_enable & ATA_MSG_PROBE)
106 #define ata_msg_warn(p) ((p)->msg_enable & ATA_MSG_WARN)
107 #define ata_msg_malloc(p) ((p)->msg_enable & ATA_MSG_MALLOC)
108 #define ata_msg_ctl(p) ((p)->msg_enable & ATA_MSG_CTL)
109 #define ata_msg_intr(p) ((p)->msg_enable & ATA_MSG_INTR)
110 #define ata_msg_err(p) ((p)->msg_enable & ATA_MSG_ERR)
111
ata_msg_init(int dval,int default_msg_enable_bits)112 static inline u32 ata_msg_init(int dval, int default_msg_enable_bits)
113 {
114 if (dval < 0 || dval >= (sizeof(u32) * 8))
115 return default_msg_enable_bits; /* should be 0x1 - only driver info msgs */
116 if (!dval)
117 return 0;
118 return (1 << dval) - 1;
119 }
120
121 /* defines only for the constants which don't work well as enums */
122 #define ATA_TAG_POISON 0xfafbfcfdU
123
124 enum {
125 /* various global constants */
126 LIBATA_MAX_PRD = ATA_MAX_PRD / 2,
127 LIBATA_DUMB_MAX_PRD = ATA_MAX_PRD / 4, /* Worst case */
128 ATA_DEF_QUEUE = 1,
129 ATA_MAX_QUEUE = 32,
130 ATA_TAG_INTERNAL = ATA_MAX_QUEUE,
131 ATA_SHORT_PAUSE = 16,
132
133 ATAPI_MAX_DRAIN = 16 << 10,
134
135 ATA_ALL_DEVICES = (1 << ATA_MAX_DEVICES) - 1,
136
137 ATA_SHT_EMULATED = 1,
138 ATA_SHT_THIS_ID = -1,
139 ATA_SHT_USE_CLUSTERING = 1,
140
141 /* struct ata_taskfile flags */
142 ATA_TFLAG_LBA48 = (1 << 0), /* enable 48-bit LBA and "HOB" */
143 ATA_TFLAG_ISADDR = (1 << 1), /* enable r/w to nsect/lba regs */
144 ATA_TFLAG_DEVICE = (1 << 2), /* enable r/w to device reg */
145 ATA_TFLAG_WRITE = (1 << 3), /* data dir: host->dev==1 (write) */
146 ATA_TFLAG_LBA = (1 << 4), /* enable LBA */
147 ATA_TFLAG_FUA = (1 << 5), /* enable FUA */
148 ATA_TFLAG_POLLING = (1 << 6), /* set nIEN to 1 and use polling */
149
150 /* struct ata_device stuff */
151 ATA_DFLAG_LBA = (1 << 0), /* device supports LBA */
152 ATA_DFLAG_LBA48 = (1 << 1), /* device supports LBA48 */
153 ATA_DFLAG_CDB_INTR = (1 << 2), /* device asserts INTRQ when ready for CDB */
154 ATA_DFLAG_NCQ = (1 << 3), /* device supports NCQ */
155 ATA_DFLAG_FLUSH_EXT = (1 << 4), /* do FLUSH_EXT instead of FLUSH */
156 ATA_DFLAG_ACPI_PENDING = (1 << 5), /* ACPI resume action pending */
157 ATA_DFLAG_ACPI_FAILED = (1 << 6), /* ACPI on devcfg has failed */
158 ATA_DFLAG_AN = (1 << 7), /* AN configured */
159 ATA_DFLAG_TRUSTED = (1 << 8), /* device supports trusted send/recv */
160 ATA_DFLAG_DMADIR = (1 << 10), /* device requires DMADIR */
161 ATA_DFLAG_CFG_MASK = (1 << 12) - 1,
162
163 ATA_DFLAG_PIO = (1 << 12), /* device limited to PIO mode */
164 ATA_DFLAG_NCQ_OFF = (1 << 13), /* device limited to non-NCQ mode */
165 ATA_DFLAG_SLEEPING = (1 << 15), /* device is sleeping */
166 ATA_DFLAG_DUBIOUS_XFER = (1 << 16), /* data transfer not verified */
167 ATA_DFLAG_NO_UNLOAD = (1 << 17), /* device doesn't support unload */
168 ATA_DFLAG_UNLOCK_HPA = (1 << 18), /* unlock HPA */
169 ATA_DFLAG_NCQ_SEND_RECV = (1 << 19), /* device supports NCQ SEND and RECV */
170 ATA_DFLAG_NCQ_PRIO = (1 << 20), /* device supports NCQ priority */
171 ATA_DFLAG_NCQ_PRIO_ENABLE = (1 << 21), /* Priority cmds sent to dev */
172 ATA_DFLAG_INIT_MASK = (1 << 24) - 1,
173
174 ATA_DFLAG_DETACH = (1 << 24),
175 ATA_DFLAG_DETACHED = (1 << 25),
176
177 ATA_DFLAG_DA = (1 << 26), /* device supports Device Attention */
178 ATA_DFLAG_DEVSLP = (1 << 27), /* device supports Device Sleep */
179 ATA_DFLAG_ACPI_DISABLED = (1 << 28), /* ACPI for the device is disabled */
180 ATA_DFLAG_D_SENSE = (1 << 29), /* Descriptor sense requested */
181 ATA_DFLAG_ZAC = (1 << 30), /* ZAC device */
182
183 ATA_DEV_UNKNOWN = 0, /* unknown device */
184 ATA_DEV_ATA = 1, /* ATA device */
185 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */
186 ATA_DEV_ATAPI = 3, /* ATAPI device */
187 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */
188 ATA_DEV_PMP = 5, /* SATA port multiplier */
189 ATA_DEV_PMP_UNSUP = 6, /* SATA port multiplier (unsupported) */
190 ATA_DEV_SEMB = 7, /* SEMB */
191 ATA_DEV_SEMB_UNSUP = 8, /* SEMB (unsupported) */
192 ATA_DEV_ZAC = 9, /* ZAC device */
193 ATA_DEV_ZAC_UNSUP = 10, /* ZAC device (unsupported) */
194 ATA_DEV_NONE = 11, /* no device */
195
196 /* struct ata_link flags */
197 ATA_LFLAG_NO_HRST = (1 << 1), /* avoid hardreset */
198 ATA_LFLAG_NO_SRST = (1 << 2), /* avoid softreset */
199 ATA_LFLAG_ASSUME_ATA = (1 << 3), /* assume ATA class */
200 ATA_LFLAG_ASSUME_SEMB = (1 << 4), /* assume SEMB class */
201 ATA_LFLAG_ASSUME_CLASS = ATA_LFLAG_ASSUME_ATA | ATA_LFLAG_ASSUME_SEMB,
202 ATA_LFLAG_NO_RETRY = (1 << 5), /* don't retry this link */
203 ATA_LFLAG_DISABLED = (1 << 6), /* link is disabled */
204 ATA_LFLAG_SW_ACTIVITY = (1 << 7), /* keep activity stats */
205 ATA_LFLAG_NO_LPM = (1 << 8), /* disable LPM on this link */
206 ATA_LFLAG_RST_ONCE = (1 << 9), /* limit recovery to one reset */
207 ATA_LFLAG_CHANGED = (1 << 10), /* LPM state changed on this link */
208 ATA_LFLAG_NO_DB_DELAY = (1 << 11), /* no debounce delay on link resume */
209
210 /* struct ata_port flags */
211 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */
212 /* (doesn't imply presence) */
213 ATA_FLAG_SATA = (1 << 1),
214 ATA_FLAG_NO_LPM = (1 << 2), /* host not happy with LPM */
215 ATA_FLAG_NO_LOG_PAGE = (1 << 5), /* do not issue log page read */
216 ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */
217 ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */
218 ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */
219 ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD
220 * doesn't handle PIO interrupts */
221 ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */
222 ATA_FLAG_NO_POWEROFF_SPINDOWN = (1 << 11), /* don't spindown before poweroff */
223 ATA_FLAG_NO_HIBERNATE_SPINDOWN = (1 << 12), /* don't spindown before hibernation */
224 ATA_FLAG_DEBUGMSG = (1 << 13),
225 ATA_FLAG_FPDMA_AA = (1 << 14), /* driver supports Auto-Activate */
226 ATA_FLAG_IGN_SIMPLEX = (1 << 15), /* ignore SIMPLEX */
227 ATA_FLAG_NO_IORDY = (1 << 16), /* controller lacks iordy */
228 ATA_FLAG_ACPI_SATA = (1 << 17), /* need native SATA ACPI layout */
229 ATA_FLAG_AN = (1 << 18), /* controller supports AN */
230 ATA_FLAG_PMP = (1 << 19), /* controller supports PMP */
231 ATA_FLAG_FPDMA_AUX = (1 << 20), /* controller supports H2DFIS aux field */
232 ATA_FLAG_EM = (1 << 21), /* driver supports enclosure
233 * management */
234 ATA_FLAG_SW_ACTIVITY = (1 << 22), /* driver supports sw activity
235 * led */
236 ATA_FLAG_NO_DIPM = (1 << 23), /* host not happy with DIPM */
237 ATA_FLAG_SAS_HOST = (1 << 24), /* SAS host */
238
239 /* bits 24:31 of ap->flags are reserved for LLD specific flags */
240
241
242 /* struct ata_port pflags */
243 ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */
244 ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */
245 ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */
246 ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */
247 ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */
248 ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */
249 ATA_PFLAG_INITIALIZING = (1 << 7), /* being initialized, don't touch */
250 ATA_PFLAG_RESETTING = (1 << 8), /* reset in progress */
251 ATA_PFLAG_UNLOADING = (1 << 9), /* driver is being unloaded */
252 ATA_PFLAG_UNLOADED = (1 << 10), /* driver is unloaded */
253
254 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */
255 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */
256 ATA_PFLAG_INIT_GTM_VALID = (1 << 19), /* initial gtm data valid */
257
258 ATA_PFLAG_PIO32 = (1 << 20), /* 32bit PIO */
259 ATA_PFLAG_PIO32CHANGE = (1 << 21), /* 32bit PIO can be turned on/off */
260 ATA_PFLAG_EXTERNAL = (1 << 22), /* eSATA/external port */
261
262 /* struct ata_queued_cmd flags */
263 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */
264 ATA_QCFLAG_DMAMAP = (1 << 1), /* SG table is DMA mapped */
265 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */
266 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */
267 ATA_QCFLAG_CLEAR_EXCL = (1 << 5), /* clear excl_link on completion */
268 ATA_QCFLAG_QUIET = (1 << 6), /* don't report device error */
269 ATA_QCFLAG_RETRY = (1 << 7), /* retry after failure */
270
271 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */
272 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */
273 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */
274
275 /* host set flags */
276 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */
277 ATA_HOST_STARTED = (1 << 1), /* Host started */
278 ATA_HOST_PARALLEL_SCAN = (1 << 2), /* Ports on this host can be scanned in parallel */
279 ATA_HOST_IGNORE_ATA = (1 << 3), /* Ignore ATA devices on this host. */
280
281 ATA_HOST_NO_PART = (1 << 4), /* Host does not support partial */
282 ATA_HOST_NO_SSC = (1 << 5), /* Host does not support slumber */
283 ATA_HOST_NO_DEVSLP = (1 << 6), /* Host does not support devslp */
284
285 /* bits 24:31 of host->flags are reserved for LLD specific flags */
286
287 /* various lengths of time */
288 ATA_TMOUT_BOOT = 30000, /* heuristic */
289 ATA_TMOUT_BOOT_QUICK = 7000, /* heuristic */
290 ATA_TMOUT_INTERNAL_QUICK = 5000,
291 ATA_TMOUT_MAX_PARK = 30000,
292
293 /*
294 * GoVault needs 2s and iVDR disk HHD424020F7SV00 800ms. 2s
295 * is too much without parallel probing. Use 2s if parallel
296 * probing is available, 800ms otherwise.
297 */
298 ATA_TMOUT_FF_WAIT_LONG = 2000,
299 ATA_TMOUT_FF_WAIT = 800,
300
301 /* Spec mandates to wait for ">= 2ms" before checking status
302 * after reset. We wait 150ms, because that was the magic
303 * delay used for ATAPI devices in Hale Landis's ATADRVR, for
304 * the period of time between when the ATA command register is
305 * written, and then status is checked. Because waiting for
306 * "a while" before checking status is fine, post SRST, we
307 * perform this magic delay here as well.
308 *
309 * Old drivers/ide uses the 2mS rule and then waits for ready.
310 */
311 ATA_WAIT_AFTER_RESET = 150,
312
313 /* If PMP is supported, we have to do follow-up SRST. As some
314 * PMPs don't send D2H Reg FIS after hardreset, LLDs are
315 * advised to wait only for the following duration before
316 * doing SRST.
317 */
318 ATA_TMOUT_PMP_SRST_WAIT = 10000,
319
320 /* When the LPM policy is set to ATA_LPM_MAX_POWER, there might
321 * be a spurious PHY event, so ignore the first PHY event that
322 * occurs within 10s after the policy change.
323 */
324 ATA_TMOUT_SPURIOUS_PHY = 10000,
325
326 /* ATA bus states */
327 BUS_UNKNOWN = 0,
328 BUS_DMA = 1,
329 BUS_IDLE = 2,
330 BUS_NOINTR = 3,
331 BUS_NODATA = 4,
332 BUS_TIMER = 5,
333 BUS_PIO = 6,
334 BUS_EDD = 7,
335 BUS_IDENTIFY = 8,
336 BUS_PACKET = 9,
337
338 /* SATA port states */
339 PORT_UNKNOWN = 0,
340 PORT_ENABLED = 1,
341 PORT_DISABLED = 2,
342
343 /* encoding various smaller bitmaps into a single
344 * unsigned long bitmap
345 */
346 ATA_NR_PIO_MODES = 7,
347 ATA_NR_MWDMA_MODES = 5,
348 ATA_NR_UDMA_MODES = 8,
349
350 ATA_SHIFT_PIO = 0,
351 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_NR_PIO_MODES,
352 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_NR_MWDMA_MODES,
353 ATA_SHIFT_PRIO = 6,
354
355 ATA_PRIO_HIGH = 2,
356 /* size of buffer to pad xfers ending on unaligned boundaries */
357 ATA_DMA_PAD_SZ = 4,
358
359 /* ering size */
360 ATA_ERING_SIZE = 32,
361
362 /* return values for ->qc_defer */
363 ATA_DEFER_LINK = 1,
364 ATA_DEFER_PORT = 2,
365
366 /* desc_len for ata_eh_info and context */
367 ATA_EH_DESC_LEN = 80,
368
369 /* reset / recovery action types */
370 ATA_EH_REVALIDATE = (1 << 0),
371 ATA_EH_SOFTRESET = (1 << 1), /* meaningful only in ->prereset */
372 ATA_EH_HARDRESET = (1 << 2), /* meaningful only in ->prereset */
373 ATA_EH_RESET = ATA_EH_SOFTRESET | ATA_EH_HARDRESET,
374 ATA_EH_ENABLE_LINK = (1 << 3),
375 ATA_EH_PARK = (1 << 5), /* unload heads and stop I/O */
376
377 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE | ATA_EH_PARK,
378 ATA_EH_ALL_ACTIONS = ATA_EH_REVALIDATE | ATA_EH_RESET |
379 ATA_EH_ENABLE_LINK,
380
381 /* ata_eh_info->flags */
382 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */
383 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */
384 ATA_EHI_QUIET = (1 << 3), /* be quiet */
385 ATA_EHI_NO_RECOVERY = (1 << 4), /* no recovery */
386
387 ATA_EHI_DID_SOFTRESET = (1 << 16), /* already soft-reset this port */
388 ATA_EHI_DID_HARDRESET = (1 << 17), /* already soft-reset this port */
389 ATA_EHI_PRINTINFO = (1 << 18), /* print configuration info */
390 ATA_EHI_SETMODE = (1 << 19), /* configure transfer mode */
391 ATA_EHI_POST_SETMODE = (1 << 20), /* revalidating after setmode */
392
393 ATA_EHI_DID_RESET = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET,
394
395 /* mask of flags to transfer *to* the slave link */
396 ATA_EHI_TO_SLAVE_MASK = ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET,
397
398 /* max tries if error condition is still set after ->error_handler */
399 ATA_EH_MAX_TRIES = 5,
400
401 /* sometimes resuming a link requires several retries */
402 ATA_LINK_RESUME_TRIES = 5,
403
404 /* how hard are we gonna try to probe/recover devices */
405 ATA_PROBE_MAX_TRIES = 3,
406 ATA_EH_DEV_TRIES = 3,
407 ATA_EH_PMP_TRIES = 5,
408 ATA_EH_PMP_LINK_TRIES = 3,
409
410 SATA_PMP_RW_TIMEOUT = 3000, /* PMP read/write timeout */
411
412 /* This should match the actual table size of
413 * ata_eh_cmd_timeout_table in libata-eh.c.
414 */
415 ATA_EH_CMD_TIMEOUT_TABLE_SIZE = 7,
416
417 /* Horkage types. May be set by libata or controller on drives
418 (some horkage may be drive/controller pair dependent */
419
420 ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */
421 ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */
422 ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */
423 ATA_HORKAGE_MAX_SEC_128 = (1 << 3), /* Limit max sects to 128 */
424 ATA_HORKAGE_BROKEN_HPA = (1 << 4), /* Broken HPA */
425 ATA_HORKAGE_DISABLE = (1 << 5), /* Disable it */
426 ATA_HORKAGE_HPA_SIZE = (1 << 6), /* native size off by one */
427 ATA_HORKAGE_IVB = (1 << 8), /* cbl det validity bit bugs */
428 ATA_HORKAGE_STUCK_ERR = (1 << 9), /* stuck ERR on next PACKET */
429 ATA_HORKAGE_BRIDGE_OK = (1 << 10), /* no bridge limits */
430 ATA_HORKAGE_ATAPI_MOD16_DMA = (1 << 11), /* use ATAPI DMA for commands
431 not multiple of 16 bytes */
432 ATA_HORKAGE_FIRMWARE_WARN = (1 << 12), /* firmware update warning */
433 ATA_HORKAGE_1_5_GBPS = (1 << 13), /* force 1.5 Gbps */
434 ATA_HORKAGE_NOSETXFER = (1 << 14), /* skip SETXFER, SATA only */
435 ATA_HORKAGE_BROKEN_FPDMA_AA = (1 << 15), /* skip AA */
436 ATA_HORKAGE_DUMP_ID = (1 << 16), /* dump IDENTIFY data */
437 ATA_HORKAGE_MAX_SEC_LBA48 = (1 << 17), /* Set max sects to 65535 */
438 ATA_HORKAGE_ATAPI_DMADIR = (1 << 18), /* device requires dmadir */
439 ATA_HORKAGE_NO_NCQ_TRIM = (1 << 19), /* don't use queued TRIM */
440 ATA_HORKAGE_NOLPM = (1 << 20), /* don't use LPM */
441 ATA_HORKAGE_WD_BROKEN_LPM = (1 << 21), /* some WDs have broken LPM */
442 ATA_HORKAGE_ZERO_AFTER_TRIM = (1 << 22),/* guarantees zero after trim */
443 ATA_HORKAGE_NO_DMA_LOG = (1 << 23), /* don't use DMA for log read */
444 ATA_HORKAGE_NOTRIM = (1 << 24), /* don't use TRIM */
445 ATA_HORKAGE_MAX_SEC_1024 = (1 << 25), /* Limit max sects to 1024 */
446 ATA_HORKAGE_MAX_TRIM_128M = (1 << 26), /* Limit max trim size to 128M */
447 ATA_HORKAGE_NO_NCQ_ON_ATI = (1 << 27), /* Disable NCQ on ATI chipset */
448
449 /* DMA mask for user DMA control: User visible values; DO NOT
450 renumber */
451 ATA_DMA_MASK_ATA = (1 << 0), /* DMA on ATA Disk */
452 ATA_DMA_MASK_ATAPI = (1 << 1), /* DMA on ATAPI */
453 ATA_DMA_MASK_CFA = (1 << 2), /* DMA on CF Card */
454
455 /* ATAPI command types */
456 ATAPI_READ = 0, /* READs */
457 ATAPI_WRITE = 1, /* WRITEs */
458 ATAPI_READ_CD = 2, /* READ CD [MSF] */
459 ATAPI_PASS_THRU = 3, /* SAT pass-thru */
460 ATAPI_MISC = 4, /* the rest */
461
462 /* Timing constants */
463 ATA_TIMING_SETUP = (1 << 0),
464 ATA_TIMING_ACT8B = (1 << 1),
465 ATA_TIMING_REC8B = (1 << 2),
466 ATA_TIMING_CYC8B = (1 << 3),
467 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
468 ATA_TIMING_CYC8B,
469 ATA_TIMING_ACTIVE = (1 << 4),
470 ATA_TIMING_RECOVER = (1 << 5),
471 ATA_TIMING_DMACK_HOLD = (1 << 6),
472 ATA_TIMING_CYCLE = (1 << 7),
473 ATA_TIMING_UDMA = (1 << 8),
474 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
475 ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
476 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
477 ATA_TIMING_DMACK_HOLD | ATA_TIMING_CYCLE |
478 ATA_TIMING_UDMA,
479
480 /* ACPI constants */
481 ATA_ACPI_FILTER_SETXFER = 1 << 0,
482 ATA_ACPI_FILTER_LOCK = 1 << 1,
483 ATA_ACPI_FILTER_DIPM = 1 << 2,
484 ATA_ACPI_FILTER_FPDMA_OFFSET = 1 << 3, /* FPDMA non-zero offset */
485 ATA_ACPI_FILTER_FPDMA_AA = 1 << 4, /* FPDMA auto activate */
486
487 ATA_ACPI_FILTER_DEFAULT = ATA_ACPI_FILTER_SETXFER |
488 ATA_ACPI_FILTER_LOCK |
489 ATA_ACPI_FILTER_DIPM,
490 };
491
492 enum ata_xfer_mask {
493 ATA_MASK_PIO = ((1LU << ATA_NR_PIO_MODES) - 1)
494 << ATA_SHIFT_PIO,
495 ATA_MASK_MWDMA = ((1LU << ATA_NR_MWDMA_MODES) - 1)
496 << ATA_SHIFT_MWDMA,
497 ATA_MASK_UDMA = ((1LU << ATA_NR_UDMA_MODES) - 1)
498 << ATA_SHIFT_UDMA,
499 };
500
501 enum hsm_task_states {
502 HSM_ST_IDLE, /* no command on going */
503 HSM_ST_FIRST, /* (waiting the device to)
504 write CDB or first data block */
505 HSM_ST, /* (waiting the device to) transfer data */
506 HSM_ST_LAST, /* (waiting the device to) complete command */
507 HSM_ST_ERR, /* error */
508 };
509
510 enum ata_completion_errors {
511 AC_ERR_OK = 0, /* no error */
512 AC_ERR_DEV = (1 << 0), /* device reported error */
513 AC_ERR_HSM = (1 << 1), /* host state machine violation */
514 AC_ERR_TIMEOUT = (1 << 2), /* timeout */
515 AC_ERR_MEDIA = (1 << 3), /* media error */
516 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */
517 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */
518 AC_ERR_SYSTEM = (1 << 6), /* system error */
519 AC_ERR_INVALID = (1 << 7), /* invalid argument */
520 AC_ERR_OTHER = (1 << 8), /* unknown */
521 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */
522 AC_ERR_NCQ = (1 << 10), /* marker for offending NCQ qc */
523 };
524
525 /*
526 * Link power management policy: If you alter this, you also need to
527 * alter libata-scsi.c (for the ascii descriptions)
528 */
529 enum ata_lpm_policy {
530 ATA_LPM_UNKNOWN,
531 ATA_LPM_MAX_POWER,
532 ATA_LPM_MED_POWER,
533 ATA_LPM_MED_POWER_WITH_DIPM, /* Med power + DIPM as win IRST does */
534 ATA_LPM_MIN_POWER_WITH_PARTIAL, /* Min Power + partial and slumber */
535 ATA_LPM_MIN_POWER, /* Min power + no partial (slumber only) */
536 };
537
538 enum ata_lpm_hints {
539 ATA_LPM_EMPTY = (1 << 0), /* port empty/probing */
540 ATA_LPM_HIPM = (1 << 1), /* may use HIPM */
541 ATA_LPM_WAKE_ONLY = (1 << 2), /* only wake up link */
542 };
543
544 /* forward declarations */
545 struct scsi_device;
546 struct ata_port_operations;
547 struct ata_port;
548 struct ata_link;
549 struct ata_queued_cmd;
550
551 /* typedefs */
552 typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
553 typedef int (*ata_prereset_fn_t)(struct ata_link *link, unsigned long deadline);
554 typedef int (*ata_reset_fn_t)(struct ata_link *link, unsigned int *classes,
555 unsigned long deadline);
556 typedef void (*ata_postreset_fn_t)(struct ata_link *link, unsigned int *classes);
557
558 extern struct device_attribute dev_attr_link_power_management_policy;
559 extern struct device_attribute dev_attr_unload_heads;
560 extern struct device_attribute dev_attr_ncq_prio_enable;
561 extern struct device_attribute dev_attr_em_message_type;
562 extern struct device_attribute dev_attr_em_message;
563 extern struct device_attribute dev_attr_sw_activity;
564
565 enum sw_activity {
566 OFF,
567 BLINK_ON,
568 BLINK_OFF,
569 };
570
571 struct ata_taskfile {
572 unsigned long flags; /* ATA_TFLAG_xxx */
573 u8 protocol; /* ATA_PROT_xxx */
574
575 u8 ctl; /* control reg */
576
577 u8 hob_feature; /* additional data */
578 u8 hob_nsect; /* to support LBA48 */
579 u8 hob_lbal;
580 u8 hob_lbam;
581 u8 hob_lbah;
582
583 u8 feature;
584 u8 nsect;
585 u8 lbal;
586 u8 lbam;
587 u8 lbah;
588
589 u8 device;
590
591 u8 command; /* IO operation */
592
593 u32 auxiliary; /* auxiliary field */
594 /* from SATA 3.1 and */
595 /* ATA-8 ACS-3 */
596 };
597
598 #ifdef CONFIG_ATA_SFF
599 struct ata_ioports {
600 void __iomem *cmd_addr;
601 void __iomem *data_addr;
602 void __iomem *error_addr;
603 void __iomem *feature_addr;
604 void __iomem *nsect_addr;
605 void __iomem *lbal_addr;
606 void __iomem *lbam_addr;
607 void __iomem *lbah_addr;
608 void __iomem *device_addr;
609 void __iomem *status_addr;
610 void __iomem *command_addr;
611 void __iomem *altstatus_addr;
612 void __iomem *ctl_addr;
613 #ifdef CONFIG_ATA_BMDMA
614 void __iomem *bmdma_addr;
615 #endif /* CONFIG_ATA_BMDMA */
616 void __iomem *scr_addr;
617 };
618 #endif /* CONFIG_ATA_SFF */
619
620 struct ata_host {
621 spinlock_t lock;
622 struct device *dev;
623 void __iomem * const *iomap;
624 unsigned int n_ports;
625 unsigned int n_tags; /* nr of NCQ tags */
626 void *private_data;
627 struct ata_port_operations *ops;
628 unsigned long flags;
629 struct kref kref;
630
631 struct mutex eh_mutex;
632 struct task_struct *eh_owner;
633
634 struct ata_port *simplex_claimed; /* channel owning the DMA */
635 struct ata_port *ports[0];
636 };
637
638 struct ata_queued_cmd {
639 struct ata_port *ap;
640 struct ata_device *dev;
641
642 struct scsi_cmnd *scsicmd;
643 void (*scsidone)(struct scsi_cmnd *);
644
645 struct ata_taskfile tf;
646 u8 cdb[ATAPI_CDB_LEN];
647
648 unsigned long flags; /* ATA_QCFLAG_xxx */
649 unsigned int tag; /* libata core tag */
650 unsigned int hw_tag; /* driver tag */
651 unsigned int n_elem;
652 unsigned int orig_n_elem;
653
654 int dma_dir;
655
656 unsigned int sect_size;
657
658 unsigned int nbytes;
659 unsigned int extrabytes;
660 unsigned int curbytes;
661
662 struct scatterlist sgent;
663
664 struct scatterlist *sg;
665
666 struct scatterlist *cursg;
667 unsigned int cursg_ofs;
668
669 unsigned int err_mask;
670 struct ata_taskfile result_tf;
671 ata_qc_cb_t complete_fn;
672
673 void *private_data;
674 void *lldd_task;
675 };
676
677 struct ata_port_stats {
678 unsigned long unhandled_irq;
679 unsigned long idle_irq;
680 unsigned long rw_reqbuf;
681 };
682
683 struct ata_ering_entry {
684 unsigned int eflags;
685 unsigned int err_mask;
686 u64 timestamp;
687 };
688
689 struct ata_ering {
690 int cursor;
691 struct ata_ering_entry ring[ATA_ERING_SIZE];
692 };
693
694 struct ata_device {
695 struct ata_link *link;
696 unsigned int devno; /* 0 or 1 */
697 unsigned int horkage; /* List of broken features */
698 unsigned long flags; /* ATA_DFLAG_xxx */
699 struct scsi_device *sdev; /* attached SCSI device */
700 void *private_data;
701 #ifdef CONFIG_ATA_ACPI
702 union acpi_object *gtf_cache;
703 unsigned int gtf_filter;
704 #endif
705 #ifdef CONFIG_SATA_ZPODD
706 void *zpodd;
707 #endif
708 struct device tdev;
709 /* n_sector is CLEAR_BEGIN, read comment above CLEAR_BEGIN */
710 u64 n_sectors; /* size of device, if ATA */
711 u64 n_native_sectors; /* native size, if ATA */
712 unsigned int class; /* ATA_DEV_xxx */
713 unsigned long unpark_deadline;
714
715 u8 pio_mode;
716 u8 dma_mode;
717 u8 xfer_mode;
718 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
719
720 unsigned int multi_count; /* sectors count for
721 READ/WRITE MULTIPLE */
722 unsigned int max_sectors; /* per-device max sectors */
723 unsigned int cdb_len;
724
725 /* per-dev xfer mask */
726 unsigned long pio_mask;
727 unsigned long mwdma_mask;
728 unsigned long udma_mask;
729
730 /* for CHS addressing */
731 u16 cylinders; /* Number of cylinders */
732 u16 heads; /* Number of heads */
733 u16 sectors; /* Number of sectors per track */
734
735 union {
736 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
737 u32 gscr[SATA_PMP_GSCR_DWORDS]; /* PMP GSCR block */
738 } ____cacheline_aligned;
739
740 /* DEVSLP Timing Variables from Identify Device Data Log */
741 u8 devslp_timing[ATA_LOG_DEVSLP_SIZE];
742
743 /* NCQ send and receive log subcommand support */
744 u8 ncq_send_recv_cmds[ATA_LOG_NCQ_SEND_RECV_SIZE];
745 u8 ncq_non_data_cmds[ATA_LOG_NCQ_NON_DATA_SIZE];
746
747 /* ZAC zone configuration */
748 u32 zac_zoned_cap;
749 u32 zac_zones_optimal_open;
750 u32 zac_zones_optimal_nonseq;
751 u32 zac_zones_max_open;
752
753 /* error history */
754 int spdn_cnt;
755 /* ering is CLEAR_END, read comment above CLEAR_END */
756 struct ata_ering ering;
757 };
758
759 /* Fields between ATA_DEVICE_CLEAR_BEGIN and ATA_DEVICE_CLEAR_END are
760 * cleared to zero on ata_dev_init().
761 */
762 #define ATA_DEVICE_CLEAR_BEGIN offsetof(struct ata_device, n_sectors)
763 #define ATA_DEVICE_CLEAR_END offsetof(struct ata_device, ering)
764
765 struct ata_eh_info {
766 struct ata_device *dev; /* offending device */
767 u32 serror; /* SError from LLDD */
768 unsigned int err_mask; /* port-wide err_mask */
769 unsigned int action; /* ATA_EH_* action mask */
770 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */
771 unsigned int flags; /* ATA_EHI_* flags */
772
773 unsigned int probe_mask;
774
775 char desc[ATA_EH_DESC_LEN];
776 int desc_len;
777 };
778
779 struct ata_eh_context {
780 struct ata_eh_info i;
781 int tries[ATA_MAX_DEVICES];
782 int cmd_timeout_idx[ATA_MAX_DEVICES]
783 [ATA_EH_CMD_TIMEOUT_TABLE_SIZE];
784 unsigned int classes[ATA_MAX_DEVICES];
785 unsigned int did_probe_mask;
786 unsigned int unloaded_mask;
787 unsigned int saved_ncq_enabled;
788 u8 saved_xfer_mode[ATA_MAX_DEVICES];
789 /* timestamp for the last reset attempt or success */
790 unsigned long last_reset;
791 };
792
793 struct ata_acpi_drive
794 {
795 u32 pio;
796 u32 dma;
797 } __packed;
798
799 struct ata_acpi_gtm {
800 struct ata_acpi_drive drive[2];
801 u32 flags;
802 } __packed;
803
804 struct ata_link {
805 struct ata_port *ap;
806 int pmp; /* port multiplier port # */
807
808 struct device tdev;
809 unsigned int active_tag; /* active tag on this link */
810 u32 sactive; /* active NCQ commands */
811
812 unsigned int flags; /* ATA_LFLAG_xxx */
813
814 u32 saved_scontrol; /* SControl on probe */
815 unsigned int hw_sata_spd_limit;
816 unsigned int sata_spd_limit;
817 unsigned int sata_spd; /* current SATA PHY speed */
818 enum ata_lpm_policy lpm_policy;
819
820 /* record runtime error info, protected by host_set lock */
821 struct ata_eh_info eh_info;
822 /* EH context */
823 struct ata_eh_context eh_context;
824
825 struct ata_device device[ATA_MAX_DEVICES];
826
827 unsigned long last_lpm_change; /* when last LPM change happened */
828 };
829 #define ATA_LINK_CLEAR_BEGIN offsetof(struct ata_link, active_tag)
830 #define ATA_LINK_CLEAR_END offsetof(struct ata_link, device[0])
831
832 struct ata_port {
833 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */
834 struct ata_port_operations *ops;
835 spinlock_t *lock;
836 /* Flags owned by the EH context. Only EH should touch these once the
837 port is active */
838 unsigned long flags; /* ATA_FLAG_xxx */
839 /* Flags that change dynamically, protected by ap->lock */
840 unsigned int pflags; /* ATA_PFLAG_xxx */
841 unsigned int print_id; /* user visible unique port ID */
842 unsigned int local_port_no; /* host local port num */
843 unsigned int port_no; /* 0 based port no. inside the host */
844
845 #ifdef CONFIG_ATA_SFF
846 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
847 u8 ctl; /* cache of ATA control register */
848 u8 last_ctl; /* Cache last written value */
849 struct ata_link* sff_pio_task_link; /* link currently used */
850 struct delayed_work sff_pio_task;
851 #ifdef CONFIG_ATA_BMDMA
852 struct ata_bmdma_prd *bmdma_prd; /* BMDMA SG list */
853 dma_addr_t bmdma_prd_dma; /* and its DMA mapping */
854 #endif /* CONFIG_ATA_BMDMA */
855 #endif /* CONFIG_ATA_SFF */
856
857 unsigned int pio_mask;
858 unsigned int mwdma_mask;
859 unsigned int udma_mask;
860 unsigned int cbl; /* cable type; ATA_CBL_xxx */
861
862 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE + 1];
863 unsigned long sas_tag_allocated; /* for sas tag allocation only */
864 u64 qc_active;
865 int nr_active_links; /* #links with active qcs */
866 unsigned int sas_last_tag; /* track next tag hw expects */
867
868 struct ata_link link; /* host default link */
869 struct ata_link *slave_link; /* see ata_slave_link_init() */
870
871 int nr_pmp_links; /* nr of available PMP links */
872 struct ata_link *pmp_link; /* array of PMP links */
873 struct ata_link *excl_link; /* for PMP qc exclusion */
874
875 struct ata_port_stats stats;
876 struct ata_host *host;
877 struct device *dev;
878 struct device tdev;
879
880 struct mutex scsi_scan_mutex;
881 struct delayed_work hotplug_task;
882 struct work_struct scsi_rescan_task;
883
884 unsigned int hsm_task_state;
885
886 u32 msg_enable;
887 struct list_head eh_done_q;
888 wait_queue_head_t eh_wait_q;
889 int eh_tries;
890 struct completion park_req_pending;
891
892 pm_message_t pm_mesg;
893 enum ata_lpm_policy target_lpm_policy;
894
895 struct timer_list fastdrain_timer;
896 unsigned long fastdrain_cnt;
897
898 async_cookie_t cookie;
899
900 int em_message_type;
901 void *private_data;
902
903 #ifdef CONFIG_ATA_ACPI
904 struct ata_acpi_gtm __acpi_init_gtm; /* use ata_acpi_init_gtm() */
905 #endif
906 /* owned by EH */
907 u8 sector_buf[ATA_SECT_SIZE] ____cacheline_aligned;
908 };
909
910 /* The following initializer overrides a method to NULL whether one of
911 * its parent has the method defined or not. This is equivalent to
912 * ERR_PTR(-ENOENT). Unfortunately, ERR_PTR doesn't render a constant
913 * expression and thus can't be used as an initializer.
914 */
915 #define ATA_OP_NULL (void *)(unsigned long)(-ENOENT)
916
917 struct ata_port_operations {
918 /*
919 * Command execution
920 */
921 int (*qc_defer)(struct ata_queued_cmd *qc);
922 int (*check_atapi_dma)(struct ata_queued_cmd *qc);
923 enum ata_completion_errors (*qc_prep)(struct ata_queued_cmd *qc);
924 unsigned int (*qc_issue)(struct ata_queued_cmd *qc);
925 bool (*qc_fill_rtf)(struct ata_queued_cmd *qc);
926
927 /*
928 * Configuration and exception handling
929 */
930 int (*cable_detect)(struct ata_port *ap);
931 unsigned long (*mode_filter)(struct ata_device *dev, unsigned long xfer_mask);
932 void (*set_piomode)(struct ata_port *ap, struct ata_device *dev);
933 void (*set_dmamode)(struct ata_port *ap, struct ata_device *dev);
934 int (*set_mode)(struct ata_link *link, struct ata_device **r_failed_dev);
935 unsigned int (*read_id)(struct ata_device *dev, struct ata_taskfile *tf, u16 *id);
936
937 void (*dev_config)(struct ata_device *dev);
938
939 void (*freeze)(struct ata_port *ap);
940 void (*thaw)(struct ata_port *ap);
941 ata_prereset_fn_t prereset;
942 ata_reset_fn_t softreset;
943 ata_reset_fn_t hardreset;
944 ata_postreset_fn_t postreset;
945 ata_prereset_fn_t pmp_prereset;
946 ata_reset_fn_t pmp_softreset;
947 ata_reset_fn_t pmp_hardreset;
948 ata_postreset_fn_t pmp_postreset;
949 void (*error_handler)(struct ata_port *ap);
950 void (*lost_interrupt)(struct ata_port *ap);
951 void (*post_internal_cmd)(struct ata_queued_cmd *qc);
952 void (*sched_eh)(struct ata_port *ap);
953 void (*end_eh)(struct ata_port *ap);
954
955 /*
956 * Optional features
957 */
958 int (*scr_read)(struct ata_link *link, unsigned int sc_reg, u32 *val);
959 int (*scr_write)(struct ata_link *link, unsigned int sc_reg, u32 val);
960 void (*pmp_attach)(struct ata_port *ap);
961 void (*pmp_detach)(struct ata_port *ap);
962 int (*set_lpm)(struct ata_link *link, enum ata_lpm_policy policy,
963 unsigned hints);
964
965 /*
966 * Start, stop, suspend and resume
967 */
968 int (*port_suspend)(struct ata_port *ap, pm_message_t mesg);
969 int (*port_resume)(struct ata_port *ap);
970 int (*port_start)(struct ata_port *ap);
971 void (*port_stop)(struct ata_port *ap);
972 void (*host_stop)(struct ata_host *host);
973
974 #ifdef CONFIG_ATA_SFF
975 /*
976 * SFF / taskfile oriented ops
977 */
978 void (*sff_dev_select)(struct ata_port *ap, unsigned int device);
979 void (*sff_set_devctl)(struct ata_port *ap, u8 ctl);
980 u8 (*sff_check_status)(struct ata_port *ap);
981 u8 (*sff_check_altstatus)(struct ata_port *ap);
982 void (*sff_tf_load)(struct ata_port *ap, const struct ata_taskfile *tf);
983 void (*sff_tf_read)(struct ata_port *ap, struct ata_taskfile *tf);
984 void (*sff_exec_command)(struct ata_port *ap,
985 const struct ata_taskfile *tf);
986 unsigned int (*sff_data_xfer)(struct ata_queued_cmd *qc,
987 unsigned char *buf, unsigned int buflen, int rw);
988 void (*sff_irq_on)(struct ata_port *);
989 bool (*sff_irq_check)(struct ata_port *);
990 void (*sff_irq_clear)(struct ata_port *);
991 void (*sff_drain_fifo)(struct ata_queued_cmd *qc);
992
993 #ifdef CONFIG_ATA_BMDMA
994 void (*bmdma_setup)(struct ata_queued_cmd *qc);
995 void (*bmdma_start)(struct ata_queued_cmd *qc);
996 void (*bmdma_stop)(struct ata_queued_cmd *qc);
997 u8 (*bmdma_status)(struct ata_port *ap);
998 #endif /* CONFIG_ATA_BMDMA */
999 #endif /* CONFIG_ATA_SFF */
1000
1001 ssize_t (*em_show)(struct ata_port *ap, char *buf);
1002 ssize_t (*em_store)(struct ata_port *ap, const char *message,
1003 size_t size);
1004 ssize_t (*sw_activity_show)(struct ata_device *dev, char *buf);
1005 ssize_t (*sw_activity_store)(struct ata_device *dev,
1006 enum sw_activity val);
1007 ssize_t (*transmit_led_message)(struct ata_port *ap, u32 state,
1008 ssize_t size);
1009
1010 /*
1011 * Obsolete
1012 */
1013 void (*phy_reset)(struct ata_port *ap);
1014 void (*eng_timeout)(struct ata_port *ap);
1015
1016 /*
1017 * ->inherits must be the last field and all the preceding
1018 * fields must be pointers.
1019 */
1020 const struct ata_port_operations *inherits;
1021 };
1022
1023 struct ata_port_info {
1024 unsigned long flags;
1025 unsigned long link_flags;
1026 unsigned long pio_mask;
1027 unsigned long mwdma_mask;
1028 unsigned long udma_mask;
1029 struct ata_port_operations *port_ops;
1030 void *private_data;
1031 };
1032
1033 struct ata_timing {
1034 unsigned short mode; /* ATA mode */
1035 unsigned short setup; /* t1 */
1036 unsigned short act8b; /* t2 for 8-bit I/O */
1037 unsigned short rec8b; /* t2i for 8-bit I/O */
1038 unsigned short cyc8b; /* t0 for 8-bit I/O */
1039 unsigned short active; /* t2 or tD */
1040 unsigned short recover; /* t2i or tK */
1041 unsigned short dmack_hold; /* tj */
1042 unsigned short cycle; /* t0 */
1043 unsigned short udma; /* t2CYCTYP/2 */
1044 };
1045
1046 /*
1047 * Core layer - drivers/ata/libata-core.c
1048 */
1049 extern const unsigned long sata_deb_timing_normal[];
1050 extern const unsigned long sata_deb_timing_hotplug[];
1051 extern const unsigned long sata_deb_timing_long[];
1052
1053 extern struct ata_port_operations ata_dummy_port_ops;
1054 extern const struct ata_port_info ata_dummy_port_info;
1055
ata_is_atapi(u8 prot)1056 static inline bool ata_is_atapi(u8 prot)
1057 {
1058 return prot & ATA_PROT_FLAG_ATAPI;
1059 }
1060
ata_is_pio(u8 prot)1061 static inline bool ata_is_pio(u8 prot)
1062 {
1063 return prot & ATA_PROT_FLAG_PIO;
1064 }
1065
ata_is_dma(u8 prot)1066 static inline bool ata_is_dma(u8 prot)
1067 {
1068 return prot & ATA_PROT_FLAG_DMA;
1069 }
1070
ata_is_ncq(u8 prot)1071 static inline bool ata_is_ncq(u8 prot)
1072 {
1073 return prot & ATA_PROT_FLAG_NCQ;
1074 }
1075
ata_is_data(u8 prot)1076 static inline bool ata_is_data(u8 prot)
1077 {
1078 return prot & (ATA_PROT_FLAG_PIO | ATA_PROT_FLAG_DMA);
1079 }
1080
is_multi_taskfile(struct ata_taskfile * tf)1081 static inline int is_multi_taskfile(struct ata_taskfile *tf)
1082 {
1083 return (tf->command == ATA_CMD_READ_MULTI) ||
1084 (tf->command == ATA_CMD_WRITE_MULTI) ||
1085 (tf->command == ATA_CMD_READ_MULTI_EXT) ||
1086 (tf->command == ATA_CMD_WRITE_MULTI_EXT) ||
1087 (tf->command == ATA_CMD_WRITE_MULTI_FUA_EXT);
1088 }
1089
1090 static inline const unsigned long *
sata_ehc_deb_timing(struct ata_eh_context * ehc)1091 sata_ehc_deb_timing(struct ata_eh_context *ehc)
1092 {
1093 if (ehc->i.flags & ATA_EHI_HOTPLUGGED)
1094 return sata_deb_timing_hotplug;
1095 else
1096 return sata_deb_timing_normal;
1097 }
1098
ata_port_is_dummy(struct ata_port * ap)1099 static inline int ata_port_is_dummy(struct ata_port *ap)
1100 {
1101 return ap->ops == &ata_dummy_port_ops;
1102 }
1103
1104 extern int sata_set_spd(struct ata_link *link);
1105 extern int ata_std_prereset(struct ata_link *link, unsigned long deadline);
1106 extern int ata_wait_after_reset(struct ata_link *link, unsigned long deadline,
1107 int (*check_ready)(struct ata_link *link));
1108 extern int sata_link_debounce(struct ata_link *link,
1109 const unsigned long *params, unsigned long deadline);
1110 extern int sata_link_resume(struct ata_link *link, const unsigned long *params,
1111 unsigned long deadline);
1112 extern int sata_link_scr_lpm(struct ata_link *link, enum ata_lpm_policy policy,
1113 bool spm_wakeup);
1114 extern int sata_link_hardreset(struct ata_link *link,
1115 const unsigned long *timing, unsigned long deadline,
1116 bool *online, int (*check_ready)(struct ata_link *));
1117 extern int sata_std_hardreset(struct ata_link *link, unsigned int *class,
1118 unsigned long deadline);
1119 extern void ata_std_postreset(struct ata_link *link, unsigned int *classes);
1120
1121 extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports);
1122 extern struct ata_host *ata_host_alloc_pinfo(struct device *dev,
1123 const struct ata_port_info * const * ppi, int n_ports);
1124 extern int ata_slave_link_init(struct ata_port *ap);
1125 extern void ata_host_get(struct ata_host *host);
1126 extern void ata_host_put(struct ata_host *host);
1127 extern int ata_host_start(struct ata_host *host);
1128 extern int ata_host_register(struct ata_host *host,
1129 struct scsi_host_template *sht);
1130 extern int ata_host_activate(struct ata_host *host, int irq,
1131 irq_handler_t irq_handler, unsigned long irq_flags,
1132 struct scsi_host_template *sht);
1133 extern void ata_host_detach(struct ata_host *host);
1134 extern void ata_host_init(struct ata_host *, struct device *, struct ata_port_operations *);
1135 extern int ata_scsi_detect(struct scsi_host_template *sht);
1136 extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
1137 extern int ata_scsi_queuecmd(struct Scsi_Host *h, struct scsi_cmnd *cmd);
1138 extern int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *dev,
1139 int cmd, void __user *arg);
1140 extern void ata_sas_port_destroy(struct ata_port *);
1141 extern struct ata_port *ata_sas_port_alloc(struct ata_host *,
1142 struct ata_port_info *, struct Scsi_Host *);
1143 extern void ata_sas_async_probe(struct ata_port *ap);
1144 extern int ata_sas_sync_probe(struct ata_port *ap);
1145 extern int ata_sas_port_init(struct ata_port *);
1146 extern int ata_sas_port_start(struct ata_port *ap);
1147 extern int ata_sas_tport_add(struct device *parent, struct ata_port *ap);
1148 extern void ata_sas_tport_delete(struct ata_port *ap);
1149 extern void ata_sas_port_stop(struct ata_port *ap);
1150 extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *);
1151 extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, struct ata_port *ap);
1152 extern int sata_scr_valid(struct ata_link *link);
1153 extern int sata_scr_read(struct ata_link *link, int reg, u32 *val);
1154 extern int sata_scr_write(struct ata_link *link, int reg, u32 val);
1155 extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val);
1156 extern bool ata_link_online(struct ata_link *link);
1157 extern bool ata_link_offline(struct ata_link *link);
1158 #ifdef CONFIG_PM
1159 extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg);
1160 extern void ata_host_resume(struct ata_host *host);
1161 extern void ata_sas_port_suspend(struct ata_port *ap);
1162 extern void ata_sas_port_resume(struct ata_port *ap);
1163 #else
ata_sas_port_suspend(struct ata_port * ap)1164 static inline void ata_sas_port_suspend(struct ata_port *ap)
1165 {
1166 }
ata_sas_port_resume(struct ata_port * ap)1167 static inline void ata_sas_port_resume(struct ata_port *ap)
1168 {
1169 }
1170 #endif
1171 extern int ata_ratelimit(void);
1172 extern void ata_msleep(struct ata_port *ap, unsigned int msecs);
1173 extern u32 ata_wait_register(struct ata_port *ap, void __iomem *reg, u32 mask,
1174 u32 val, unsigned long interval, unsigned long timeout);
1175 extern int atapi_cmd_type(u8 opcode);
1176 extern void ata_tf_to_fis(const struct ata_taskfile *tf,
1177 u8 pmp, int is_cmd, u8 *fis);
1178 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
1179 extern unsigned long ata_pack_xfermask(unsigned long pio_mask,
1180 unsigned long mwdma_mask, unsigned long udma_mask);
1181 extern void ata_unpack_xfermask(unsigned long xfer_mask,
1182 unsigned long *pio_mask, unsigned long *mwdma_mask,
1183 unsigned long *udma_mask);
1184 extern u8 ata_xfer_mask2mode(unsigned long xfer_mask);
1185 extern unsigned long ata_xfer_mode2mask(u8 xfer_mode);
1186 extern int ata_xfer_mode2shift(unsigned long xfer_mode);
1187 extern const char *ata_mode_string(unsigned long xfer_mask);
1188 extern unsigned long ata_id_xfermask(const u16 *id);
1189 extern int ata_std_qc_defer(struct ata_queued_cmd *qc);
1190 extern enum ata_completion_errors ata_noop_qc_prep(struct ata_queued_cmd *qc);
1191 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
1192 unsigned int n_elem);
1193 extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
1194 extern void ata_dev_disable(struct ata_device *adev);
1195 extern void ata_id_string(const u16 *id, unsigned char *s,
1196 unsigned int ofs, unsigned int len);
1197 extern void ata_id_c_string(const u16 *id, unsigned char *s,
1198 unsigned int ofs, unsigned int len);
1199 extern unsigned int ata_do_dev_read_id(struct ata_device *dev,
1200 struct ata_taskfile *tf, u16 *id);
1201 extern void ata_qc_complete(struct ata_queued_cmd *qc);
1202 extern int ata_qc_complete_multiple(struct ata_port *ap, u64 qc_active);
1203 extern u64 ata_qc_get_active(struct ata_port *ap);
1204 extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd);
1205 extern int ata_std_bios_param(struct scsi_device *sdev,
1206 struct block_device *bdev,
1207 sector_t capacity, int geom[]);
1208 extern void ata_scsi_unlock_native_capacity(struct scsi_device *sdev);
1209 extern int ata_scsi_slave_config(struct scsi_device *sdev);
1210 extern void ata_scsi_slave_destroy(struct scsi_device *sdev);
1211 extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
1212 int queue_depth);
1213 extern int __ata_change_queue_depth(struct ata_port *ap, struct scsi_device *sdev,
1214 int queue_depth);
1215 extern struct ata_device *ata_dev_pair(struct ata_device *adev);
1216 extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev);
1217 extern void ata_scsi_port_error_handler(struct Scsi_Host *host, struct ata_port *ap);
1218 extern void ata_scsi_cmd_error_handler(struct Scsi_Host *host, struct ata_port *ap, struct list_head *eh_q);
1219 extern bool sata_lpm_ignore_phy_events(struct ata_link *link);
1220
1221 extern int ata_cable_40wire(struct ata_port *ap);
1222 extern int ata_cable_80wire(struct ata_port *ap);
1223 extern int ata_cable_sata(struct ata_port *ap);
1224 extern int ata_cable_ignore(struct ata_port *ap);
1225 extern int ata_cable_unknown(struct ata_port *ap);
1226
1227 /* Timing helpers */
1228 extern unsigned int ata_pio_need_iordy(const struct ata_device *);
1229 extern const struct ata_timing *ata_timing_find_mode(u8 xfer_mode);
1230 extern int ata_timing_compute(struct ata_device *, unsigned short,
1231 struct ata_timing *, int, int);
1232 extern void ata_timing_merge(const struct ata_timing *,
1233 const struct ata_timing *, struct ata_timing *,
1234 unsigned int);
1235 extern u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle);
1236
1237 /* PCI */
1238 #ifdef CONFIG_PCI
1239 struct pci_dev;
1240
1241 struct pci_bits {
1242 unsigned int reg; /* PCI config register to read */
1243 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
1244 unsigned long mask;
1245 unsigned long val;
1246 };
1247
1248 extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
1249 extern void ata_pci_shutdown_one(struct pci_dev *pdev);
1250 extern void ata_pci_remove_one(struct pci_dev *pdev);
1251
1252 #ifdef CONFIG_PM
1253 extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg);
1254 extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev);
1255 extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
1256 extern int ata_pci_device_resume(struct pci_dev *pdev);
1257 #endif /* CONFIG_PM */
1258 #endif /* CONFIG_PCI */
1259
1260 struct platform_device;
1261
1262 extern int ata_platform_remove_one(struct platform_device *pdev);
1263
1264 /*
1265 * ACPI - drivers/ata/libata-acpi.c
1266 */
1267 #ifdef CONFIG_ATA_ACPI
ata_acpi_init_gtm(struct ata_port * ap)1268 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
1269 {
1270 if (ap->pflags & ATA_PFLAG_INIT_GTM_VALID)
1271 return &ap->__acpi_init_gtm;
1272 return NULL;
1273 }
1274 int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm);
1275 int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *stm);
1276 unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev,
1277 const struct ata_acpi_gtm *gtm);
1278 int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm);
1279 #else
ata_acpi_init_gtm(struct ata_port * ap)1280 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
1281 {
1282 return NULL;
1283 }
1284
ata_acpi_stm(const struct ata_port * ap,struct ata_acpi_gtm * stm)1285 static inline int ata_acpi_stm(const struct ata_port *ap,
1286 struct ata_acpi_gtm *stm)
1287 {
1288 return -ENOSYS;
1289 }
1290
ata_acpi_gtm(const struct ata_port * ap,struct ata_acpi_gtm * stm)1291 static inline int ata_acpi_gtm(const struct ata_port *ap,
1292 struct ata_acpi_gtm *stm)
1293 {
1294 return -ENOSYS;
1295 }
1296
ata_acpi_gtm_xfermask(struct ata_device * dev,const struct ata_acpi_gtm * gtm)1297 static inline unsigned int ata_acpi_gtm_xfermask(struct ata_device *dev,
1298 const struct ata_acpi_gtm *gtm)
1299 {
1300 return 0;
1301 }
1302
ata_acpi_cbl_80wire(struct ata_port * ap,const struct ata_acpi_gtm * gtm)1303 static inline int ata_acpi_cbl_80wire(struct ata_port *ap,
1304 const struct ata_acpi_gtm *gtm)
1305 {
1306 return 0;
1307 }
1308 #endif
1309
1310 /*
1311 * EH - drivers/ata/libata-eh.c
1312 */
1313 extern void ata_port_schedule_eh(struct ata_port *ap);
1314 extern void ata_port_wait_eh(struct ata_port *ap);
1315 extern int ata_link_abort(struct ata_link *link);
1316 extern int ata_port_abort(struct ata_port *ap);
1317 extern int ata_port_freeze(struct ata_port *ap);
1318 extern int sata_async_notification(struct ata_port *ap);
1319
1320 extern void ata_eh_freeze_port(struct ata_port *ap);
1321 extern void ata_eh_thaw_port(struct ata_port *ap);
1322
1323 extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
1324 extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
1325 extern void ata_eh_analyze_ncq_error(struct ata_link *link);
1326
1327 extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
1328 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
1329 ata_postreset_fn_t postreset);
1330 extern void ata_std_error_handler(struct ata_port *ap);
1331 extern void ata_std_sched_eh(struct ata_port *ap);
1332 extern void ata_std_end_eh(struct ata_port *ap);
1333 extern int ata_link_nr_enabled(struct ata_link *link);
1334
1335 /*
1336 * Base operations to inherit from and initializers for sht
1337 *
1338 * Operations
1339 *
1340 * base : Common to all libata drivers.
1341 * sata : SATA controllers w/ native interface.
1342 * pmp : SATA controllers w/ PMP support.
1343 * sff : SFF ATA controllers w/o BMDMA support.
1344 * bmdma : SFF ATA controllers w/ BMDMA support.
1345 *
1346 * sht initializers
1347 *
1348 * BASE : Common to all libata drivers. The user must set
1349 * sg_tablesize and dma_boundary.
1350 * PIO : SFF ATA controllers w/ only PIO support.
1351 * BMDMA : SFF ATA controllers w/ BMDMA support. sg_tablesize and
1352 * dma_boundary are set to BMDMA limits.
1353 * NCQ : SATA controllers supporting NCQ. The user must set
1354 * sg_tablesize, dma_boundary and can_queue.
1355 */
1356 extern const struct ata_port_operations ata_base_port_ops;
1357 extern const struct ata_port_operations sata_port_ops;
1358 extern struct device_attribute *ata_common_sdev_attrs[];
1359
1360 /*
1361 * All sht initializers (BASE, PIO, BMDMA, NCQ) must be instantiated
1362 * by the edge drivers. Because the 'module' field of sht must be the
1363 * edge driver's module reference, otherwise the driver can be unloaded
1364 * even if the scsi_device is being accessed.
1365 */
1366 #define ATA_BASE_SHT(drv_name) \
1367 .module = THIS_MODULE, \
1368 .name = drv_name, \
1369 .ioctl = ata_scsi_ioctl, \
1370 .queuecommand = ata_scsi_queuecmd, \
1371 .can_queue = ATA_DEF_QUEUE, \
1372 .tag_alloc_policy = BLK_TAG_ALLOC_RR, \
1373 .this_id = ATA_SHT_THIS_ID, \
1374 .emulated = ATA_SHT_EMULATED, \
1375 .use_clustering = ATA_SHT_USE_CLUSTERING, \
1376 .proc_name = drv_name, \
1377 .slave_configure = ata_scsi_slave_config, \
1378 .slave_destroy = ata_scsi_slave_destroy, \
1379 .bios_param = ata_std_bios_param, \
1380 .unlock_native_capacity = ata_scsi_unlock_native_capacity, \
1381 .sdev_attrs = ata_common_sdev_attrs
1382
1383 #define ATA_NCQ_SHT(drv_name) \
1384 ATA_BASE_SHT(drv_name), \
1385 .change_queue_depth = ata_scsi_change_queue_depth
1386
1387 /*
1388 * PMP helpers
1389 */
1390 #ifdef CONFIG_SATA_PMP
sata_pmp_supported(struct ata_port * ap)1391 static inline bool sata_pmp_supported(struct ata_port *ap)
1392 {
1393 return ap->flags & ATA_FLAG_PMP;
1394 }
1395
sata_pmp_attached(struct ata_port * ap)1396 static inline bool sata_pmp_attached(struct ata_port *ap)
1397 {
1398 return ap->nr_pmp_links != 0;
1399 }
1400
ata_is_host_link(const struct ata_link * link)1401 static inline bool ata_is_host_link(const struct ata_link *link)
1402 {
1403 return link == &link->ap->link || link == link->ap->slave_link;
1404 }
1405 #else /* CONFIG_SATA_PMP */
sata_pmp_supported(struct ata_port * ap)1406 static inline bool sata_pmp_supported(struct ata_port *ap)
1407 {
1408 return false;
1409 }
1410
sata_pmp_attached(struct ata_port * ap)1411 static inline bool sata_pmp_attached(struct ata_port *ap)
1412 {
1413 return false;
1414 }
1415
ata_is_host_link(const struct ata_link * link)1416 static inline bool ata_is_host_link(const struct ata_link *link)
1417 {
1418 return 1;
1419 }
1420 #endif /* CONFIG_SATA_PMP */
1421
sata_srst_pmp(struct ata_link * link)1422 static inline int sata_srst_pmp(struct ata_link *link)
1423 {
1424 if (sata_pmp_supported(link->ap) && ata_is_host_link(link))
1425 return SATA_PMP_CTRL_PORT;
1426 return link->pmp;
1427 }
1428
1429 /*
1430 * printk helpers
1431 */
1432 __printf(3, 4)
1433 void ata_port_printk(const struct ata_port *ap, const char *level,
1434 const char *fmt, ...);
1435 __printf(3, 4)
1436 void ata_link_printk(const struct ata_link *link, const char *level,
1437 const char *fmt, ...);
1438 __printf(3, 4)
1439 void ata_dev_printk(const struct ata_device *dev, const char *level,
1440 const char *fmt, ...);
1441
1442 #define ata_port_err(ap, fmt, ...) \
1443 ata_port_printk(ap, KERN_ERR, fmt, ##__VA_ARGS__)
1444 #define ata_port_warn(ap, fmt, ...) \
1445 ata_port_printk(ap, KERN_WARNING, fmt, ##__VA_ARGS__)
1446 #define ata_port_notice(ap, fmt, ...) \
1447 ata_port_printk(ap, KERN_NOTICE, fmt, ##__VA_ARGS__)
1448 #define ata_port_info(ap, fmt, ...) \
1449 ata_port_printk(ap, KERN_INFO, fmt, ##__VA_ARGS__)
1450 #define ata_port_dbg(ap, fmt, ...) \
1451 ata_port_printk(ap, KERN_DEBUG, fmt, ##__VA_ARGS__)
1452
1453 #define ata_link_err(link, fmt, ...) \
1454 ata_link_printk(link, KERN_ERR, fmt, ##__VA_ARGS__)
1455 #define ata_link_warn(link, fmt, ...) \
1456 ata_link_printk(link, KERN_WARNING, fmt, ##__VA_ARGS__)
1457 #define ata_link_notice(link, fmt, ...) \
1458 ata_link_printk(link, KERN_NOTICE, fmt, ##__VA_ARGS__)
1459 #define ata_link_info(link, fmt, ...) \
1460 ata_link_printk(link, KERN_INFO, fmt, ##__VA_ARGS__)
1461 #define ata_link_dbg(link, fmt, ...) \
1462 ata_link_printk(link, KERN_DEBUG, fmt, ##__VA_ARGS__)
1463
1464 #define ata_dev_err(dev, fmt, ...) \
1465 ata_dev_printk(dev, KERN_ERR, fmt, ##__VA_ARGS__)
1466 #define ata_dev_warn(dev, fmt, ...) \
1467 ata_dev_printk(dev, KERN_WARNING, fmt, ##__VA_ARGS__)
1468 #define ata_dev_notice(dev, fmt, ...) \
1469 ata_dev_printk(dev, KERN_NOTICE, fmt, ##__VA_ARGS__)
1470 #define ata_dev_info(dev, fmt, ...) \
1471 ata_dev_printk(dev, KERN_INFO, fmt, ##__VA_ARGS__)
1472 #define ata_dev_dbg(dev, fmt, ...) \
1473 ata_dev_printk(dev, KERN_DEBUG, fmt, ##__VA_ARGS__)
1474
1475 void ata_print_version(const struct device *dev, const char *version);
1476
1477 /*
1478 * ata_eh_info helpers
1479 */
1480 extern __printf(2, 3)
1481 void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...);
1482 extern __printf(2, 3)
1483 void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...);
1484 extern void ata_ehi_clear_desc(struct ata_eh_info *ehi);
1485
ata_ehi_hotplugged(struct ata_eh_info * ehi)1486 static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
1487 {
1488 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
1489 ehi->flags |= ATA_EHI_HOTPLUGGED;
1490 ehi->action |= ATA_EH_RESET | ATA_EH_ENABLE_LINK;
1491 ehi->err_mask |= AC_ERR_ATA_BUS;
1492 }
1493
1494 /*
1495 * port description helpers
1496 */
1497 extern __printf(2, 3)
1498 void ata_port_desc(struct ata_port *ap, const char *fmt, ...);
1499 #ifdef CONFIG_PCI
1500 extern void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset,
1501 const char *name);
1502 #endif
1503
ata_tag_internal(unsigned int tag)1504 static inline bool ata_tag_internal(unsigned int tag)
1505 {
1506 return tag == ATA_TAG_INTERNAL;
1507 }
1508
ata_tag_valid(unsigned int tag)1509 static inline bool ata_tag_valid(unsigned int tag)
1510 {
1511 return tag < ATA_MAX_QUEUE || ata_tag_internal(tag);
1512 }
1513
1514 #define __ata_qc_for_each(ap, qc, tag, max_tag, fn) \
1515 for ((tag) = 0; (tag) < (max_tag) && \
1516 ({ qc = fn((ap), (tag)); 1; }); (tag)++) \
1517
1518 /*
1519 * Internal use only, iterate commands ignoring error handling and
1520 * status of 'qc'.
1521 */
1522 #define ata_qc_for_each_raw(ap, qc, tag) \
1523 __ata_qc_for_each(ap, qc, tag, ATA_MAX_QUEUE, __ata_qc_from_tag)
1524
1525 /*
1526 * Iterate all potential commands that can be queued
1527 */
1528 #define ata_qc_for_each(ap, qc, tag) \
1529 __ata_qc_for_each(ap, qc, tag, ATA_MAX_QUEUE, ata_qc_from_tag)
1530
1531 /*
1532 * Like ata_qc_for_each, but with the internal tag included
1533 */
1534 #define ata_qc_for_each_with_internal(ap, qc, tag) \
1535 __ata_qc_for_each(ap, qc, tag, ATA_MAX_QUEUE + 1, ata_qc_from_tag)
1536
1537 /*
1538 * device helpers
1539 */
ata_class_enabled(unsigned int class)1540 static inline unsigned int ata_class_enabled(unsigned int class)
1541 {
1542 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI ||
1543 class == ATA_DEV_PMP || class == ATA_DEV_SEMB ||
1544 class == ATA_DEV_ZAC;
1545 }
1546
ata_class_disabled(unsigned int class)1547 static inline unsigned int ata_class_disabled(unsigned int class)
1548 {
1549 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP ||
1550 class == ATA_DEV_PMP_UNSUP || class == ATA_DEV_SEMB_UNSUP ||
1551 class == ATA_DEV_ZAC_UNSUP;
1552 }
1553
ata_class_absent(unsigned int class)1554 static inline unsigned int ata_class_absent(unsigned int class)
1555 {
1556 return !ata_class_enabled(class) && !ata_class_disabled(class);
1557 }
1558
ata_dev_enabled(const struct ata_device * dev)1559 static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
1560 {
1561 return ata_class_enabled(dev->class);
1562 }
1563
ata_dev_disabled(const struct ata_device * dev)1564 static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
1565 {
1566 return ata_class_disabled(dev->class);
1567 }
1568
ata_dev_absent(const struct ata_device * dev)1569 static inline unsigned int ata_dev_absent(const struct ata_device *dev)
1570 {
1571 return ata_class_absent(dev->class);
1572 }
1573
1574 /*
1575 * link helpers
1576 */
ata_link_max_devices(const struct ata_link * link)1577 static inline int ata_link_max_devices(const struct ata_link *link)
1578 {
1579 if (ata_is_host_link(link) && link->ap->flags & ATA_FLAG_SLAVE_POSS)
1580 return 2;
1581 return 1;
1582 }
1583
ata_link_active(struct ata_link * link)1584 static inline int ata_link_active(struct ata_link *link)
1585 {
1586 return ata_tag_valid(link->active_tag) || link->sactive;
1587 }
1588
1589 /*
1590 * Iterators
1591 *
1592 * ATA_LITER_* constants are used to select link iteration mode and
1593 * ATA_DITER_* device iteration mode.
1594 *
1595 * For a custom iteration directly using ata_{link|dev}_next(), if
1596 * @link or @dev, respectively, is NULL, the first element is
1597 * returned. @dev and @link can be any valid device or link and the
1598 * next element according to the iteration mode will be returned.
1599 * After the last element, NULL is returned.
1600 */
1601 enum ata_link_iter_mode {
1602 ATA_LITER_EDGE, /* if present, PMP links only; otherwise,
1603 * host link. no slave link */
1604 ATA_LITER_HOST_FIRST, /* host link followed by PMP or slave links */
1605 ATA_LITER_PMP_FIRST, /* PMP links followed by host link,
1606 * slave link still comes after host link */
1607 };
1608
1609 enum ata_dev_iter_mode {
1610 ATA_DITER_ENABLED,
1611 ATA_DITER_ENABLED_REVERSE,
1612 ATA_DITER_ALL,
1613 ATA_DITER_ALL_REVERSE,
1614 };
1615
1616 extern struct ata_link *ata_link_next(struct ata_link *link,
1617 struct ata_port *ap,
1618 enum ata_link_iter_mode mode);
1619
1620 extern struct ata_device *ata_dev_next(struct ata_device *dev,
1621 struct ata_link *link,
1622 enum ata_dev_iter_mode mode);
1623
1624 /*
1625 * Shortcut notation for iterations
1626 *
1627 * ata_for_each_link() iterates over each link of @ap according to
1628 * @mode. @link points to the current link in the loop. @link is
1629 * NULL after loop termination. ata_for_each_dev() works the same way
1630 * except that it iterates over each device of @link.
1631 *
1632 * Note that the mode prefixes ATA_{L|D}ITER_ shouldn't need to be
1633 * specified when using the following shorthand notations. Only the
1634 * mode itself (EDGE, HOST_FIRST, ENABLED, etc...) should be
1635 * specified. This not only increases brevity but also makes it
1636 * impossible to use ATA_LITER_* for device iteration or vice-versa.
1637 */
1638 #define ata_for_each_link(link, ap, mode) \
1639 for ((link) = ata_link_next(NULL, (ap), ATA_LITER_##mode); (link); \
1640 (link) = ata_link_next((link), (ap), ATA_LITER_##mode))
1641
1642 #define ata_for_each_dev(dev, link, mode) \
1643 for ((dev) = ata_dev_next(NULL, (link), ATA_DITER_##mode); (dev); \
1644 (dev) = ata_dev_next((dev), (link), ATA_DITER_##mode))
1645
1646 /**
1647 * ata_ncq_enabled - Test whether NCQ is enabled
1648 * @dev: ATA device to test for
1649 *
1650 * LOCKING:
1651 * spin_lock_irqsave(host lock)
1652 *
1653 * RETURNS:
1654 * 1 if NCQ is enabled for @dev, 0 otherwise.
1655 */
ata_ncq_enabled(struct ata_device * dev)1656 static inline int ata_ncq_enabled(struct ata_device *dev)
1657 {
1658 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF |
1659 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ;
1660 }
1661
ata_fpdma_dsm_supported(struct ata_device * dev)1662 static inline bool ata_fpdma_dsm_supported(struct ata_device *dev)
1663 {
1664 return (dev->flags & ATA_DFLAG_NCQ_SEND_RECV) &&
1665 (dev->ncq_send_recv_cmds[ATA_LOG_NCQ_SEND_RECV_DSM_OFFSET] &
1666 ATA_LOG_NCQ_SEND_RECV_DSM_TRIM);
1667 }
1668
ata_fpdma_read_log_supported(struct ata_device * dev)1669 static inline bool ata_fpdma_read_log_supported(struct ata_device *dev)
1670 {
1671 return (dev->flags & ATA_DFLAG_NCQ_SEND_RECV) &&
1672 (dev->ncq_send_recv_cmds[ATA_LOG_NCQ_SEND_RECV_RD_LOG_OFFSET] &
1673 ATA_LOG_NCQ_SEND_RECV_RD_LOG_SUPPORTED);
1674 }
1675
ata_fpdma_zac_mgmt_in_supported(struct ata_device * dev)1676 static inline bool ata_fpdma_zac_mgmt_in_supported(struct ata_device *dev)
1677 {
1678 return (dev->flags & ATA_DFLAG_NCQ_SEND_RECV) &&
1679 (dev->ncq_send_recv_cmds[ATA_LOG_NCQ_SEND_RECV_ZAC_MGMT_OFFSET] &
1680 ATA_LOG_NCQ_SEND_RECV_ZAC_MGMT_IN_SUPPORTED);
1681 }
1682
ata_fpdma_zac_mgmt_out_supported(struct ata_device * dev)1683 static inline bool ata_fpdma_zac_mgmt_out_supported(struct ata_device *dev)
1684 {
1685 return (dev->ncq_non_data_cmds[ATA_LOG_NCQ_NON_DATA_ZAC_MGMT_OFFSET] &
1686 ATA_LOG_NCQ_NON_DATA_ZAC_MGMT_OUT);
1687 }
1688
ata_qc_set_polling(struct ata_queued_cmd * qc)1689 static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
1690 {
1691 qc->tf.ctl |= ATA_NIEN;
1692 }
1693
__ata_qc_from_tag(struct ata_port * ap,unsigned int tag)1694 static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap,
1695 unsigned int tag)
1696 {
1697 if (ata_tag_valid(tag))
1698 return &ap->qcmd[tag];
1699 return NULL;
1700 }
1701
ata_qc_from_tag(struct ata_port * ap,unsigned int tag)1702 static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap,
1703 unsigned int tag)
1704 {
1705 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
1706
1707 if (unlikely(!qc) || !ap->ops->error_handler)
1708 return qc;
1709
1710 if ((qc->flags & (ATA_QCFLAG_ACTIVE |
1711 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE)
1712 return qc;
1713
1714 return NULL;
1715 }
1716
ata_qc_raw_nbytes(struct ata_queued_cmd * qc)1717 static inline unsigned int ata_qc_raw_nbytes(struct ata_queued_cmd *qc)
1718 {
1719 return qc->nbytes - min(qc->extrabytes, qc->nbytes);
1720 }
1721
ata_tf_init(struct ata_device * dev,struct ata_taskfile * tf)1722 static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
1723 {
1724 memset(tf, 0, sizeof(*tf));
1725
1726 #ifdef CONFIG_ATA_SFF
1727 tf->ctl = dev->link->ap->ctl;
1728 #else
1729 tf->ctl = ATA_DEVCTL_OBS;
1730 #endif
1731 if (dev->devno == 0)
1732 tf->device = ATA_DEVICE_OBS;
1733 else
1734 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
1735 }
1736
ata_qc_reinit(struct ata_queued_cmd * qc)1737 static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
1738 {
1739 qc->dma_dir = DMA_NONE;
1740 qc->sg = NULL;
1741 qc->flags = 0;
1742 qc->cursg = NULL;
1743 qc->cursg_ofs = 0;
1744 qc->nbytes = qc->extrabytes = qc->curbytes = 0;
1745 qc->n_elem = 0;
1746 qc->err_mask = 0;
1747 qc->sect_size = ATA_SECT_SIZE;
1748
1749 ata_tf_init(qc->dev, &qc->tf);
1750
1751 /* init result_tf such that it indicates normal completion */
1752 qc->result_tf.command = ATA_DRDY;
1753 qc->result_tf.feature = 0;
1754 }
1755
ata_try_flush_cache(const struct ata_device * dev)1756 static inline int ata_try_flush_cache(const struct ata_device *dev)
1757 {
1758 return ata_id_wcache_enabled(dev->id) ||
1759 ata_id_has_flush(dev->id) ||
1760 ata_id_has_flush_ext(dev->id);
1761 }
1762
ac_err_mask(u8 status)1763 static inline unsigned int ac_err_mask(u8 status)
1764 {
1765 if (status & (ATA_BUSY | ATA_DRQ))
1766 return AC_ERR_HSM;
1767 if (status & (ATA_ERR | ATA_DF))
1768 return AC_ERR_DEV;
1769 return 0;
1770 }
1771
__ac_err_mask(u8 status)1772 static inline unsigned int __ac_err_mask(u8 status)
1773 {
1774 unsigned int mask = ac_err_mask(status);
1775 if (mask == 0)
1776 return AC_ERR_OTHER;
1777 return mask;
1778 }
1779
ata_shost_to_port(struct Scsi_Host * host)1780 static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
1781 {
1782 return *(struct ata_port **)&host->hostdata[0];
1783 }
1784
ata_check_ready(u8 status)1785 static inline int ata_check_ready(u8 status)
1786 {
1787 if (!(status & ATA_BUSY))
1788 return 1;
1789
1790 /* 0xff indicates either no device or device not ready */
1791 if (status == 0xff)
1792 return -ENODEV;
1793
1794 return 0;
1795 }
1796
ata_deadline(unsigned long from_jiffies,unsigned long timeout_msecs)1797 static inline unsigned long ata_deadline(unsigned long from_jiffies,
1798 unsigned long timeout_msecs)
1799 {
1800 return from_jiffies + msecs_to_jiffies(timeout_msecs);
1801 }
1802
1803 /* Don't open code these in drivers as there are traps. Firstly the range may
1804 change in future hardware and specs, secondly 0xFF means 'no DMA' but is
1805 > UDMA_0. Dyma ddreigiau */
1806
ata_using_mwdma(struct ata_device * adev)1807 static inline int ata_using_mwdma(struct ata_device *adev)
1808 {
1809 if (adev->dma_mode >= XFER_MW_DMA_0 && adev->dma_mode <= XFER_MW_DMA_4)
1810 return 1;
1811 return 0;
1812 }
1813
ata_using_udma(struct ata_device * adev)1814 static inline int ata_using_udma(struct ata_device *adev)
1815 {
1816 if (adev->dma_mode >= XFER_UDMA_0 && adev->dma_mode <= XFER_UDMA_7)
1817 return 1;
1818 return 0;
1819 }
1820
ata_dma_enabled(struct ata_device * adev)1821 static inline int ata_dma_enabled(struct ata_device *adev)
1822 {
1823 return (adev->dma_mode == 0xFF ? 0 : 1);
1824 }
1825
1826 /**************************************************************************
1827 * PMP - drivers/ata/libata-pmp.c
1828 */
1829 #ifdef CONFIG_SATA_PMP
1830
1831 extern const struct ata_port_operations sata_pmp_port_ops;
1832
1833 extern int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc);
1834 extern void sata_pmp_error_handler(struct ata_port *ap);
1835
1836 #else /* CONFIG_SATA_PMP */
1837
1838 #define sata_pmp_port_ops sata_port_ops
1839 #define sata_pmp_qc_defer_cmd_switch ata_std_qc_defer
1840 #define sata_pmp_error_handler ata_std_error_handler
1841
1842 #endif /* CONFIG_SATA_PMP */
1843
1844
1845 /**************************************************************************
1846 * SFF - drivers/ata/libata-sff.c
1847 */
1848 #ifdef CONFIG_ATA_SFF
1849
1850 extern const struct ata_port_operations ata_sff_port_ops;
1851 extern const struct ata_port_operations ata_bmdma32_port_ops;
1852
1853 /* PIO only, sg_tablesize and dma_boundary limits can be removed */
1854 #define ATA_PIO_SHT(drv_name) \
1855 ATA_BASE_SHT(drv_name), \
1856 .sg_tablesize = LIBATA_MAX_PRD, \
1857 .dma_boundary = ATA_DMA_BOUNDARY
1858
1859 extern void ata_sff_dev_select(struct ata_port *ap, unsigned int device);
1860 extern u8 ata_sff_check_status(struct ata_port *ap);
1861 extern void ata_sff_pause(struct ata_port *ap);
1862 extern void ata_sff_dma_pause(struct ata_port *ap);
1863 extern int ata_sff_busy_sleep(struct ata_port *ap,
1864 unsigned long timeout_pat, unsigned long timeout);
1865 extern int ata_sff_wait_ready(struct ata_link *link, unsigned long deadline);
1866 extern void ata_sff_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
1867 extern void ata_sff_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
1868 extern void ata_sff_exec_command(struct ata_port *ap,
1869 const struct ata_taskfile *tf);
1870 extern unsigned int ata_sff_data_xfer(struct ata_queued_cmd *qc,
1871 unsigned char *buf, unsigned int buflen, int rw);
1872 extern unsigned int ata_sff_data_xfer32(struct ata_queued_cmd *qc,
1873 unsigned char *buf, unsigned int buflen, int rw);
1874 extern void ata_sff_irq_on(struct ata_port *ap);
1875 extern void ata_sff_irq_clear(struct ata_port *ap);
1876 extern int ata_sff_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
1877 u8 status, int in_wq);
1878 extern void ata_sff_queue_work(struct work_struct *work);
1879 extern void ata_sff_queue_delayed_work(struct delayed_work *dwork,
1880 unsigned long delay);
1881 extern void ata_sff_queue_pio_task(struct ata_link *link, unsigned long delay);
1882 extern unsigned int ata_sff_qc_issue(struct ata_queued_cmd *qc);
1883 extern bool ata_sff_qc_fill_rtf(struct ata_queued_cmd *qc);
1884 extern unsigned int ata_sff_port_intr(struct ata_port *ap,
1885 struct ata_queued_cmd *qc);
1886 extern irqreturn_t ata_sff_interrupt(int irq, void *dev_instance);
1887 extern void ata_sff_lost_interrupt(struct ata_port *ap);
1888 extern void ata_sff_freeze(struct ata_port *ap);
1889 extern void ata_sff_thaw(struct ata_port *ap);
1890 extern int ata_sff_prereset(struct ata_link *link, unsigned long deadline);
1891 extern unsigned int ata_sff_dev_classify(struct ata_device *dev, int present,
1892 u8 *r_err);
1893 extern int ata_sff_wait_after_reset(struct ata_link *link, unsigned int devmask,
1894 unsigned long deadline);
1895 extern int ata_sff_softreset(struct ata_link *link, unsigned int *classes,
1896 unsigned long deadline);
1897 extern int sata_sff_hardreset(struct ata_link *link, unsigned int *class,
1898 unsigned long deadline);
1899 extern void ata_sff_postreset(struct ata_link *link, unsigned int *classes);
1900 extern void ata_sff_drain_fifo(struct ata_queued_cmd *qc);
1901 extern void ata_sff_error_handler(struct ata_port *ap);
1902 extern void ata_sff_std_ports(struct ata_ioports *ioaddr);
1903 #ifdef CONFIG_PCI
1904 extern int ata_pci_sff_init_host(struct ata_host *host);
1905 extern int ata_pci_sff_prepare_host(struct pci_dev *pdev,
1906 const struct ata_port_info * const * ppi,
1907 struct ata_host **r_host);
1908 extern int ata_pci_sff_activate_host(struct ata_host *host,
1909 irq_handler_t irq_handler,
1910 struct scsi_host_template *sht);
1911 extern int ata_pci_sff_init_one(struct pci_dev *pdev,
1912 const struct ata_port_info * const * ppi,
1913 struct scsi_host_template *sht, void *host_priv, int hflags);
1914 #endif /* CONFIG_PCI */
1915
1916 #ifdef CONFIG_ATA_BMDMA
1917
1918 extern const struct ata_port_operations ata_bmdma_port_ops;
1919
1920 #define ATA_BMDMA_SHT(drv_name) \
1921 ATA_BASE_SHT(drv_name), \
1922 .sg_tablesize = LIBATA_MAX_PRD, \
1923 .dma_boundary = ATA_DMA_BOUNDARY
1924
1925 extern enum ata_completion_errors ata_bmdma_qc_prep(struct ata_queued_cmd *qc);
1926 extern unsigned int ata_bmdma_qc_issue(struct ata_queued_cmd *qc);
1927 extern enum ata_completion_errors ata_bmdma_dumb_qc_prep(struct ata_queued_cmd *qc);
1928 extern unsigned int ata_bmdma_port_intr(struct ata_port *ap,
1929 struct ata_queued_cmd *qc);
1930 extern irqreturn_t ata_bmdma_interrupt(int irq, void *dev_instance);
1931 extern void ata_bmdma_error_handler(struct ata_port *ap);
1932 extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc);
1933 extern void ata_bmdma_irq_clear(struct ata_port *ap);
1934 extern void ata_bmdma_setup(struct ata_queued_cmd *qc);
1935 extern void ata_bmdma_start(struct ata_queued_cmd *qc);
1936 extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
1937 extern u8 ata_bmdma_status(struct ata_port *ap);
1938 extern int ata_bmdma_port_start(struct ata_port *ap);
1939 extern int ata_bmdma_port_start32(struct ata_port *ap);
1940
1941 #ifdef CONFIG_PCI
1942 extern int ata_pci_bmdma_clear_simplex(struct pci_dev *pdev);
1943 extern void ata_pci_bmdma_init(struct ata_host *host);
1944 extern int ata_pci_bmdma_prepare_host(struct pci_dev *pdev,
1945 const struct ata_port_info * const * ppi,
1946 struct ata_host **r_host);
1947 extern int ata_pci_bmdma_init_one(struct pci_dev *pdev,
1948 const struct ata_port_info * const * ppi,
1949 struct scsi_host_template *sht,
1950 void *host_priv, int hflags);
1951 #endif /* CONFIG_PCI */
1952 #endif /* CONFIG_ATA_BMDMA */
1953
1954 /**
1955 * ata_sff_busy_wait - Wait for a port status register
1956 * @ap: Port to wait for.
1957 * @bits: bits that must be clear
1958 * @max: number of 10uS waits to perform
1959 *
1960 * Waits up to max*10 microseconds for the selected bits in the port's
1961 * status register to be cleared.
1962 * Returns final value of status register.
1963 *
1964 * LOCKING:
1965 * Inherited from caller.
1966 */
ata_sff_busy_wait(struct ata_port * ap,unsigned int bits,unsigned int max)1967 static inline u8 ata_sff_busy_wait(struct ata_port *ap, unsigned int bits,
1968 unsigned int max)
1969 {
1970 u8 status;
1971
1972 do {
1973 udelay(10);
1974 status = ap->ops->sff_check_status(ap);
1975 max--;
1976 } while (status != 0xff && (status & bits) && (max > 0));
1977
1978 return status;
1979 }
1980
1981 /**
1982 * ata_wait_idle - Wait for a port to be idle.
1983 * @ap: Port to wait for.
1984 *
1985 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
1986 * Returns final value of status register.
1987 *
1988 * LOCKING:
1989 * Inherited from caller.
1990 */
ata_wait_idle(struct ata_port * ap)1991 static inline u8 ata_wait_idle(struct ata_port *ap)
1992 {
1993 u8 status = ata_sff_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
1994
1995 #ifdef ATA_DEBUG
1996 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ)))
1997 ata_port_printk(ap, KERN_DEBUG, "abnormal Status 0x%X\n",
1998 status);
1999 #endif
2000
2001 return status;
2002 }
2003 #endif /* CONFIG_ATA_SFF */
2004
2005 #endif /* __LINUX_LIBATA_H__ */
2006