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HID: automatically call usbhid_set_leds in usbhid driver
[linux-2.6/mini2440.git] / include / linux / libata.h
blob3449de597eff8810a1538672da316f33a6ad6cd6
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
41 /*
42 * Define if arch has non-standard setup. This is a _PCI_ standard
43 * not a legacy or ISA standard.
44 */
45 #ifdef CONFIG_ATA_NONSTANDARD
46 #include <asm/libata-portmap.h>
47 #else
48 #include <asm-generic/libata-portmap.h>
49 #endif
50
51 /*
52 * compile-time options: to be removed as soon as all the drivers are
53 * converted to the new debugging mechanism
54 */
55 #undef ATA_DEBUG /* debugging output */
56 #undef ATA_VERBOSE_DEBUG /* yet more debugging output */
57 #undef ATA_IRQ_TRAP /* define to ack screaming irqs */
58 #undef ATA_NDEBUG /* define to disable quick runtime checks */
59
60
61 /* note: prints function name for you */
62 #ifdef ATA_DEBUG
63 #define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args)
64 #ifdef ATA_VERBOSE_DEBUG
65 #define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args)
66 #else
67 #define VPRINTK(fmt, args...)
68 #endif /* ATA_VERBOSE_DEBUG */
69 #else
70 #define DPRINTK(fmt, args...)
71 #define VPRINTK(fmt, args...)
72 #endif /* ATA_DEBUG */
73
74 #define BPRINTK(fmt, args...) if (ap->flags & ATA_FLAG_DEBUGMSG) printk(KERN_ERR "%s: " fmt, __func__, ## args)
75
76 /* NEW: debug levels */
77 #define HAVE_LIBATA_MSG 1
78
79 enum {
80 ATA_MSG_DRV = 0x0001,
81 ATA_MSG_INFO = 0x0002,
82 ATA_MSG_PROBE = 0x0004,
83 ATA_MSG_WARN = 0x0008,
84 ATA_MSG_MALLOC = 0x0010,
85 ATA_MSG_CTL = 0x0020,
86 ATA_MSG_INTR = 0x0040,
87 ATA_MSG_ERR = 0x0080,
88 };
89
90 #define ata_msg_drv(p) ((p)->msg_enable & ATA_MSG_DRV)
91 #define ata_msg_info(p) ((p)->msg_enable & ATA_MSG_INFO)
92 #define ata_msg_probe(p) ((p)->msg_enable & ATA_MSG_PROBE)
93 #define ata_msg_warn(p) ((p)->msg_enable & ATA_MSG_WARN)
94 #define ata_msg_malloc(p) ((p)->msg_enable & ATA_MSG_MALLOC)
95 #define ata_msg_ctl(p) ((p)->msg_enable & ATA_MSG_CTL)
96 #define ata_msg_intr(p) ((p)->msg_enable & ATA_MSG_INTR)
97 #define ata_msg_err(p) ((p)->msg_enable & ATA_MSG_ERR)
98
99 static inline u32 ata_msg_init(int dval, int default_msg_enable_bits)
100 {
101 if (dval < 0 || dval >= (sizeof(u32) * 8))
102 return default_msg_enable_bits; /* should be 0x1 - only driver info msgs */
103 if (!dval)
104 return 0;
105 return (1 << dval) - 1;
106 }
107
108 /* defines only for the constants which don't work well as enums */
109 #define ATA_TAG_POISON 0xfafbfcfdU
110
111 enum {
112 /* various global constants */
113 LIBATA_MAX_PRD = ATA_MAX_PRD / 2,
114 LIBATA_DUMB_MAX_PRD = ATA_MAX_PRD / 4, /* Worst case */
115 ATA_DEF_QUEUE = 1,
116 /* tag ATA_MAX_QUEUE - 1 is reserved for internal commands */
117 ATA_MAX_QUEUE = 32,
118 ATA_TAG_INTERNAL = ATA_MAX_QUEUE - 1,
119 ATA_SHORT_PAUSE = 16,
120
121 ATAPI_MAX_DRAIN = 16 << 10,
122
123 ATA_ALL_DEVICES = (1 << ATA_MAX_DEVICES) - 1,
124
125 ATA_SHT_EMULATED = 1,
126 ATA_SHT_CMD_PER_LUN = 1,
127 ATA_SHT_THIS_ID = -1,
128 ATA_SHT_USE_CLUSTERING = 1,
129
130 /* struct ata_device stuff */
131 ATA_DFLAG_LBA = (1 << 0), /* device supports LBA */
132 ATA_DFLAG_LBA48 = (1 << 1), /* device supports LBA48 */
133 ATA_DFLAG_CDB_INTR = (1 << 2), /* device asserts INTRQ when ready for CDB */
134 ATA_DFLAG_NCQ = (1 << 3), /* device supports NCQ */
135 ATA_DFLAG_FLUSH_EXT = (1 << 4), /* do FLUSH_EXT instead of FLUSH */
136 ATA_DFLAG_ACPI_PENDING = (1 << 5), /* ACPI resume action pending */
137 ATA_DFLAG_ACPI_FAILED = (1 << 6), /* ACPI on devcfg has failed */
138 ATA_DFLAG_AN = (1 << 7), /* AN configured */
139 ATA_DFLAG_HIPM = (1 << 8), /* device supports HIPM */
140 ATA_DFLAG_DIPM = (1 << 9), /* device supports DIPM */
141 ATA_DFLAG_DMADIR = (1 << 10), /* device requires DMADIR */
142 ATA_DFLAG_CFG_MASK = (1 << 12) - 1,
143
144 ATA_DFLAG_PIO = (1 << 12), /* device limited to PIO mode */
145 ATA_DFLAG_NCQ_OFF = (1 << 13), /* device limited to non-NCQ mode */
146 ATA_DFLAG_SPUNDOWN = (1 << 14), /* XXX: for spindown_compat */
147 ATA_DFLAG_SLEEPING = (1 << 15), /* device is sleeping */
148 ATA_DFLAG_DUBIOUS_XFER = (1 << 16), /* data transfer not verified */
149 ATA_DFLAG_NO_UNLOAD = (1 << 17), /* device doesn't support unload */
150 ATA_DFLAG_INIT_MASK = (1 << 24) - 1,
151
152 ATA_DFLAG_DETACH = (1 << 24),
153 ATA_DFLAG_DETACHED = (1 << 25),
154
155 ATA_DEV_UNKNOWN = 0, /* unknown device */
156 ATA_DEV_ATA = 1, /* ATA device */
157 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */
158 ATA_DEV_ATAPI = 3, /* ATAPI device */
159 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */
160 ATA_DEV_PMP = 5, /* SATA port multiplier */
161 ATA_DEV_PMP_UNSUP = 6, /* SATA port multiplier (unsupported) */
162 ATA_DEV_SEMB = 7, /* SEMB */
163 ATA_DEV_SEMB_UNSUP = 8, /* SEMB (unsupported) */
164 ATA_DEV_NONE = 9, /* no device */
165
166 /* struct ata_link flags */
167 ATA_LFLAG_NO_HRST = (1 << 1), /* avoid hardreset */
168 ATA_LFLAG_NO_SRST = (1 << 2), /* avoid softreset */
169 ATA_LFLAG_ASSUME_ATA = (1 << 3), /* assume ATA class */
170 ATA_LFLAG_ASSUME_SEMB = (1 << 4), /* assume SEMB class */
171 ATA_LFLAG_ASSUME_CLASS = ATA_LFLAG_ASSUME_ATA | ATA_LFLAG_ASSUME_SEMB,
172 ATA_LFLAG_NO_RETRY = (1 << 5), /* don't retry this link */
173 ATA_LFLAG_DISABLED = (1 << 6), /* link is disabled */
174 ATA_LFLAG_SW_ACTIVITY = (1 << 7), /* keep activity stats */
175
176 /* struct ata_port flags */
177 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */
178 /* (doesn't imply presence) */
179 ATA_FLAG_SATA = (1 << 1),
180 ATA_FLAG_NO_LEGACY = (1 << 2), /* no legacy mode check */
181 ATA_FLAG_MMIO = (1 << 3), /* use MMIO, not PIO */
182 ATA_FLAG_SRST = (1 << 4), /* (obsolete) use ATA SRST, not E.D.D. */
183 ATA_FLAG_SATA_RESET = (1 << 5), /* (obsolete) use COMRESET */
184 ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */
185 ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */
186 ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */
187 ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD
188 * doesn't handle PIO interrupts */
189 ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */
190 ATA_FLAG_DEBUGMSG = (1 << 13),
191 ATA_FLAG_IGN_SIMPLEX = (1 << 15), /* ignore SIMPLEX */
192 ATA_FLAG_NO_IORDY = (1 << 16), /* controller lacks iordy */
193 ATA_FLAG_ACPI_SATA = (1 << 17), /* need native SATA ACPI layout */
194 ATA_FLAG_AN = (1 << 18), /* controller supports AN */
195 ATA_FLAG_PMP = (1 << 19), /* controller supports PMP */
196 ATA_FLAG_IPM = (1 << 20), /* driver can handle IPM */
197 ATA_FLAG_EM = (1 << 21), /* driver supports enclosure
198 * management */
199 ATA_FLAG_SW_ACTIVITY = (1 << 22), /* driver supports sw activity
200 * led */
201
202 /* The following flag belongs to ap->pflags but is kept in
203 * ap->flags because it's referenced in many LLDs and will be
204 * removed in not-too-distant future.
205 */
206 ATA_FLAG_DISABLED = (1 << 23), /* port is disabled, ignore it */
207
208 /* bits 24:31 of ap->flags are reserved for LLD specific flags */
209
210 /* struct ata_port pflags */
211 ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */
212 ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */
213 ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */
214 ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */
215 ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */
216 ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */
217 ATA_PFLAG_INITIALIZING = (1 << 7), /* being initialized, don't touch */
218 ATA_PFLAG_RESETTING = (1 << 8), /* reset in progress */
219 ATA_PFLAG_UNLOADING = (1 << 9), /* driver is being unloaded */
220 ATA_PFLAG_UNLOADED = (1 << 10), /* driver is unloaded */
221
222 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */
223 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */
224 ATA_PFLAG_INIT_GTM_VALID = (1 << 19), /* initial gtm data valid */
225
226 /* struct ata_queued_cmd flags */
227 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */
228 ATA_QCFLAG_DMAMAP = (1 << 1), /* SG table is DMA mapped */
229 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */
230 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */
231 ATA_QCFLAG_CLEAR_EXCL = (1 << 5), /* clear excl_link on completion */
232 ATA_QCFLAG_QUIET = (1 << 6), /* don't report device error */
233 ATA_QCFLAG_RETRY = (1 << 7), /* retry after failure */
234
235 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */
236 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */
237 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */
238
239 /* host set flags */
240 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */
241 ATA_HOST_STARTED = (1 << 1), /* Host started */
242
243 /* bits 24:31 of host->flags are reserved for LLD specific flags */
244
245 /* various lengths of time */
246 ATA_TMOUT_BOOT = 30000, /* heuristic */
247 ATA_TMOUT_BOOT_QUICK = 7000, /* heuristic */
248 ATA_TMOUT_INTERNAL_QUICK = 5000,
249 ATA_TMOUT_MAX_PARK = 30000,
250
251 /* FIXME: GoVault needs 2s but we can't afford that without
252 * parallel probing. 800ms is enough for iVDR disk
253 * HHD424020F7SV00. Increase to 2secs when parallel probing
254 * is in place.
255 */
256 ATA_TMOUT_FF_WAIT = 800,
257
258 /* Spec mandates to wait for ">= 2ms" before checking status
259 * after reset. We wait 150ms, because that was the magic
260 * delay used for ATAPI devices in Hale Landis's ATADRVR, for
261 * the period of time between when the ATA command register is
262 * written, and then status is checked. Because waiting for
263 * "a while" before checking status is fine, post SRST, we
264 * perform this magic delay here as well.
265 *
266 * Old drivers/ide uses the 2mS rule and then waits for ready.
267 */
268 ATA_WAIT_AFTER_RESET = 150,
269
270 /* If PMP is supported, we have to do follow-up SRST. As some
271 * PMPs don't send D2H Reg FIS after hardreset, LLDs are
272 * advised to wait only for the following duration before
273 * doing SRST.
274 */
275 ATA_TMOUT_PMP_SRST_WAIT = 1000,
276
277 /* ATA bus states */
278 BUS_UNKNOWN = 0,
279 BUS_DMA = 1,
280 BUS_IDLE = 2,
281 BUS_NOINTR = 3,
282 BUS_NODATA = 4,
283 BUS_TIMER = 5,
284 BUS_PIO = 6,
285 BUS_EDD = 7,
286 BUS_IDENTIFY = 8,
287 BUS_PACKET = 9,
288
289 /* SATA port states */
290 PORT_UNKNOWN = 0,
291 PORT_ENABLED = 1,
292 PORT_DISABLED = 2,
293
294 /* encoding various smaller bitmaps into a single
295 * unsigned long bitmap
296 */
297 ATA_NR_PIO_MODES = 7,
298 ATA_NR_MWDMA_MODES = 5,
299 ATA_NR_UDMA_MODES = 8,
300
301 ATA_SHIFT_PIO = 0,
302 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_NR_PIO_MODES,
303 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_NR_MWDMA_MODES,
304
305 /* size of buffer to pad xfers ending on unaligned boundaries */
306 ATA_DMA_PAD_SZ = 4,
307
308 /* ering size */
309 ATA_ERING_SIZE = 32,
310
311 /* return values for ->qc_defer */
312 ATA_DEFER_LINK = 1,
313 ATA_DEFER_PORT = 2,
314
315 /* desc_len for ata_eh_info and context */
316 ATA_EH_DESC_LEN = 80,
317
318 /* reset / recovery action types */
319 ATA_EH_REVALIDATE = (1 << 0),
320 ATA_EH_SOFTRESET = (1 << 1), /* meaningful only in ->prereset */
321 ATA_EH_HARDRESET = (1 << 2), /* meaningful only in ->prereset */
322 ATA_EH_RESET = ATA_EH_SOFTRESET | ATA_EH_HARDRESET,
323 ATA_EH_ENABLE_LINK = (1 << 3),
324 ATA_EH_LPM = (1 << 4), /* link power management action */
325 ATA_EH_PARK = (1 << 5), /* unload heads and stop I/O */
326
327 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE | ATA_EH_PARK,
328 ATA_EH_ALL_ACTIONS = ATA_EH_REVALIDATE | ATA_EH_RESET |
329 ATA_EH_ENABLE_LINK | ATA_EH_LPM,
330
331 /* ata_eh_info->flags */
332 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */
333 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */
334 ATA_EHI_QUIET = (1 << 3), /* be quiet */
335
336 ATA_EHI_DID_SOFTRESET = (1 << 16), /* already soft-reset this port */
337 ATA_EHI_DID_HARDRESET = (1 << 17), /* already soft-reset this port */
338 ATA_EHI_PRINTINFO = (1 << 18), /* print configuration info */
339 ATA_EHI_SETMODE = (1 << 19), /* configure transfer mode */
340 ATA_EHI_POST_SETMODE = (1 << 20), /* revaildating after setmode */
341
342 ATA_EHI_DID_RESET = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET,
343
344 /* mask of flags to transfer *to* the slave link */
345 ATA_EHI_TO_SLAVE_MASK = ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET,
346
347 /* max tries if error condition is still set after ->error_handler */
348 ATA_EH_MAX_TRIES = 5,
349
350 /* how hard are we gonna try to probe/recover devices */
351 ATA_PROBE_MAX_TRIES = 3,
352 ATA_EH_DEV_TRIES = 3,
353 ATA_EH_PMP_TRIES = 5,
354 ATA_EH_PMP_LINK_TRIES = 3,
355
356 SATA_PMP_RW_TIMEOUT = 3000, /* PMP read/write timeout */
357
358 /* This should match the actual table size of
359 * ata_eh_cmd_timeout_table in libata-eh.c.
360 */
361 ATA_EH_CMD_TIMEOUT_TABLE_SIZE = 5,
362
363 /* Horkage types. May be set by libata or controller on drives
364 (some horkage may be drive/controller pair dependant */
365
366 ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */
367 ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */
368 ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */
369 ATA_HORKAGE_MAX_SEC_128 = (1 << 3), /* Limit max sects to 128 */
370 ATA_HORKAGE_BROKEN_HPA = (1 << 4), /* Broken HPA */
371 ATA_HORKAGE_DISABLE = (1 << 5), /* Disable it */
372 ATA_HORKAGE_HPA_SIZE = (1 << 6), /* native size off by one */
373 ATA_HORKAGE_IPM = (1 << 7), /* Link PM problems */
374 ATA_HORKAGE_IVB = (1 << 8), /* cbl det validity bit bugs */
375 ATA_HORKAGE_STUCK_ERR = (1 << 9), /* stuck ERR on next PACKET */
376 ATA_HORKAGE_BRIDGE_OK = (1 << 10), /* no bridge limits */
377 ATA_HORKAGE_ATAPI_MOD16_DMA = (1 << 11), /* use ATAPI DMA for commands
378 not multiple of 16 bytes */
379 ATA_HORKAGE_FIRMWARE_WARN = (1 << 12), /* firwmare update warning */
380
381 /* DMA mask for user DMA control: User visible values; DO NOT
382 renumber */
383 ATA_DMA_MASK_ATA = (1 << 0), /* DMA on ATA Disk */
384 ATA_DMA_MASK_ATAPI = (1 << 1), /* DMA on ATAPI */
385 ATA_DMA_MASK_CFA = (1 << 2), /* DMA on CF Card */
386
387 /* ATAPI command types */
388 ATAPI_READ = 0, /* READs */
389 ATAPI_WRITE = 1, /* WRITEs */
390 ATAPI_READ_CD = 2, /* READ CD [MSF] */
391 ATAPI_PASS_THRU = 3, /* SAT pass-thru */
392 ATAPI_MISC = 4, /* the rest */
393
394 /* Timing constants */
395 ATA_TIMING_SETUP = (1 << 0),
396 ATA_TIMING_ACT8B = (1 << 1),
397 ATA_TIMING_REC8B = (1 << 2),
398 ATA_TIMING_CYC8B = (1 << 3),
399 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
400 ATA_TIMING_CYC8B,
401 ATA_TIMING_ACTIVE = (1 << 4),
402 ATA_TIMING_RECOVER = (1 << 5),
403 ATA_TIMING_CYCLE = (1 << 6),
404 ATA_TIMING_UDMA = (1 << 7),
405 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
406 ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
407 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
408 ATA_TIMING_CYCLE | ATA_TIMING_UDMA,
409 };
410
411 enum ata_xfer_mask {
412 ATA_MASK_PIO = ((1LU << ATA_NR_PIO_MODES) - 1)
413 << ATA_SHIFT_PIO,
414 ATA_MASK_MWDMA = ((1LU << ATA_NR_MWDMA_MODES) - 1)
415 << ATA_SHIFT_MWDMA,
416 ATA_MASK_UDMA = ((1LU << ATA_NR_UDMA_MODES) - 1)
417 << ATA_SHIFT_UDMA,
418 };
419
420 enum hsm_task_states {
421 HSM_ST_IDLE, /* no command on going */
422 HSM_ST_FIRST, /* (waiting the device to)
423 write CDB or first data block */
424 HSM_ST, /* (waiting the device to) transfer data */
425 HSM_ST_LAST, /* (waiting the device to) complete command */
426 HSM_ST_ERR, /* error */
427 };
428
429 enum ata_completion_errors {
430 AC_ERR_DEV = (1 << 0), /* device reported error */
431 AC_ERR_HSM = (1 << 1), /* host state machine violation */
432 AC_ERR_TIMEOUT = (1 << 2), /* timeout */
433 AC_ERR_MEDIA = (1 << 3), /* media error */
434 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */
435 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */
436 AC_ERR_SYSTEM = (1 << 6), /* system error */
437 AC_ERR_INVALID = (1 << 7), /* invalid argument */
438 AC_ERR_OTHER = (1 << 8), /* unknown */
439 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */
440 AC_ERR_NCQ = (1 << 10), /* marker for offending NCQ qc */
441 };
442
443 /* forward declarations */
444 struct scsi_device;
445 struct ata_port_operations;
446 struct ata_port;
447 struct ata_link;
448 struct ata_queued_cmd;
449
450 /* typedefs */
451 typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
452 typedef int (*ata_prereset_fn_t)(struct ata_link *link, unsigned long deadline);
453 typedef int (*ata_reset_fn_t)(struct ata_link *link, unsigned int *classes,
454 unsigned long deadline);
455 typedef void (*ata_postreset_fn_t)(struct ata_link *link, unsigned int *classes);
456
457 /*
458 * host pm policy: If you alter this, you also need to alter libata-scsi.c
459 * (for the ascii descriptions)
460 */
461 enum link_pm {
462 NOT_AVAILABLE,
463 MIN_POWER,
464 MAX_PERFORMANCE,
465 MEDIUM_POWER,
466 };
467 extern struct device_attribute dev_attr_link_power_management_policy;
468 extern struct device_attribute dev_attr_unload_heads;
469 extern struct device_attribute dev_attr_em_message_type;
470 extern struct device_attribute dev_attr_em_message;
471 extern struct device_attribute dev_attr_sw_activity;
472
473 enum sw_activity {
474 OFF,
475 BLINK_ON,
476 BLINK_OFF,
477 };
478
479 #ifdef CONFIG_ATA_SFF
480 struct ata_ioports {
481 void __iomem *cmd_addr;
482 void __iomem *data_addr;
483 void __iomem *error_addr;
484 void __iomem *feature_addr;
485 void __iomem *nsect_addr;
486 void __iomem *lbal_addr;
487 void __iomem *lbam_addr;
488 void __iomem *lbah_addr;
489 void __iomem *device_addr;
490 void __iomem *status_addr;
491 void __iomem *command_addr;
492 void __iomem *altstatus_addr;
493 void __iomem *ctl_addr;
494 void __iomem *bmdma_addr;
495 void __iomem *scr_addr;
496 };
497 #endif /* CONFIG_ATA_SFF */
498
499 struct ata_host {
500 spinlock_t lock;
501 struct device *dev;
502 void __iomem * const *iomap;
503 unsigned int n_ports;
504 void *private_data;
505 struct ata_port_operations *ops;
506 unsigned long flags;
507 #ifdef CONFIG_ATA_ACPI
508 acpi_handle acpi_handle;
509 #endif
510 struct ata_port *simplex_claimed; /* channel owning the DMA */
511 struct ata_port *ports[0];
512 };
513
514 struct ata_queued_cmd {
515 struct ata_port *ap;
516 struct ata_device *dev;
517
518 struct scsi_cmnd *scsicmd;
519 void (*scsidone)(struct scsi_cmnd *);
520
521 struct ata_taskfile tf;
522 u8 cdb[ATAPI_CDB_LEN];
523
524 unsigned long flags; /* ATA_QCFLAG_xxx */
525 unsigned int tag;
526 unsigned int n_elem;
527
528 int dma_dir;
529
530 unsigned int sect_size;
531
532 unsigned int nbytes;
533 unsigned int extrabytes;
534 unsigned int curbytes;
535
536 struct scatterlist *cursg;
537 unsigned int cursg_ofs;
538
539 struct scatterlist sgent;
540
541 struct scatterlist *sg;
542
543 unsigned int err_mask;
544 struct ata_taskfile result_tf;
545 ata_qc_cb_t complete_fn;
546
547 void *private_data;
548 void *lldd_task;
549 };
550
551 struct ata_port_stats {
552 unsigned long unhandled_irq;
553 unsigned long idle_irq;
554 unsigned long rw_reqbuf;
555 };
556
557 struct ata_ering_entry {
558 unsigned int eflags;
559 unsigned int err_mask;
560 u64 timestamp;
561 };
562
563 struct ata_ering {
564 int cursor;
565 struct ata_ering_entry ring[ATA_ERING_SIZE];
566 };
567
568 struct ata_device {
569 struct ata_link *link;
570 unsigned int devno; /* 0 or 1 */
571 unsigned int horkage; /* List of broken features */
572 unsigned long flags; /* ATA_DFLAG_xxx */
573 struct scsi_device *sdev; /* attached SCSI device */
574 #ifdef CONFIG_ATA_ACPI
575 acpi_handle acpi_handle;
576 union acpi_object *gtf_cache;
577 #endif
578 /* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */
579 u64 n_sectors; /* size of device, if ATA */
580 unsigned int class; /* ATA_DEV_xxx */
581 unsigned long unpark_deadline;
582
583 u8 pio_mode;
584 u8 dma_mode;
585 u8 xfer_mode;
586 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
587
588 unsigned int multi_count; /* sectors count for
589 READ/WRITE MULTIPLE */
590 unsigned int max_sectors; /* per-device max sectors */
591 unsigned int cdb_len;
592
593 /* per-dev xfer mask */
594 unsigned long pio_mask;
595 unsigned long mwdma_mask;
596 unsigned long udma_mask;
597
598 /* for CHS addressing */
599 u16 cylinders; /* Number of cylinders */
600 u16 heads; /* Number of heads */
601 u16 sectors; /* Number of sectors per track */
602
603 /* error history */
604 int spdn_cnt;
605 struct ata_ering ering;
606
607 union {
608 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
609 u32 gscr[SATA_PMP_GSCR_DWORDS]; /* PMP GSCR block */
610 };
611 };
612
613 /* Offset into struct ata_device. Fields above it are maintained
614 * acress device init. Fields below are zeroed.
615 */
616 #define ATA_DEVICE_CLEAR_OFFSET offsetof(struct ata_device, n_sectors)
617
618 struct ata_eh_info {
619 struct ata_device *dev; /* offending device */
620 u32 serror; /* SError from LLDD */
621 unsigned int err_mask; /* port-wide err_mask */
622 unsigned int action; /* ATA_EH_* action mask */
623 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */
624 unsigned int flags; /* ATA_EHI_* flags */
625
626 unsigned int probe_mask;
627
628 char desc[ATA_EH_DESC_LEN];
629 int desc_len;
630 };
631
632 struct ata_eh_context {
633 struct ata_eh_info i;
634 int tries[ATA_MAX_DEVICES];
635 int cmd_timeout_idx[ATA_MAX_DEVICES]
636 [ATA_EH_CMD_TIMEOUT_TABLE_SIZE];
637 unsigned int classes[ATA_MAX_DEVICES];
638 unsigned int did_probe_mask;
639 unsigned int unloaded_mask;
640 unsigned int saved_ncq_enabled;
641 u8 saved_xfer_mode[ATA_MAX_DEVICES];
642 /* timestamp for the last reset attempt or success */
643 unsigned long last_reset;
644 };
645
646 struct ata_acpi_drive
647 {
648 u32 pio;
649 u32 dma;
650 } __packed;
651
652 struct ata_acpi_gtm {
653 struct ata_acpi_drive drive[2];
654 u32 flags;
655 } __packed;
656
657 struct ata_link {
658 struct ata_port *ap;
659 int pmp; /* port multiplier port # */
660
661 unsigned int active_tag; /* active tag on this link */
662 u32 sactive; /* active NCQ commands */
663
664 unsigned int flags; /* ATA_LFLAG_xxx */
665
666 u32 saved_scontrol; /* SControl on probe */
667 unsigned int hw_sata_spd_limit;
668 unsigned int sata_spd_limit;
669 unsigned int sata_spd; /* current SATA PHY speed */
670
671 /* record runtime error info, protected by host_set lock */
672 struct ata_eh_info eh_info;
673 /* EH context */
674 struct ata_eh_context eh_context;
675
676 struct ata_device device[ATA_MAX_DEVICES];
677 };
678
679 struct ata_port {
680 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */
681 struct ata_port_operations *ops;
682 spinlock_t *lock;
683 unsigned long flags; /* ATA_FLAG_xxx */
684 unsigned int pflags; /* ATA_PFLAG_xxx */
685 unsigned int print_id; /* user visible unique port ID */
686 unsigned int port_no; /* 0 based port no. inside the host */
687
688 struct ata_prd *prd; /* our SG list */
689 dma_addr_t prd_dma; /* and its DMA mapping */
690
691 #ifdef CONFIG_ATA_SFF
692 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
693 #endif /* CONFIG_ATA_SFF */
694
695 u8 ctl; /* cache of ATA control register */
696 u8 last_ctl; /* Cache last written value */
697 unsigned int pio_mask;
698 unsigned int mwdma_mask;
699 unsigned int udma_mask;
700 unsigned int cbl; /* cable type; ATA_CBL_xxx */
701
702 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
703 unsigned long qc_allocated;
704 unsigned int qc_active;
705 int nr_active_links; /* #links with active qcs */
706
707 struct ata_link link; /* host default link */
708 struct ata_link *slave_link; /* see ata_slave_link_init() */
709
710 int nr_pmp_links; /* nr of available PMP links */
711 struct ata_link *pmp_link; /* array of PMP links */
712 struct ata_link *excl_link; /* for PMP qc exclusion */
713
714 struct ata_port_stats stats;
715 struct ata_host *host;
716 struct device *dev;
717
718 void *port_task_data;
719 struct delayed_work port_task;
720 struct delayed_work hotplug_task;
721 struct work_struct scsi_rescan_task;
722
723 unsigned int hsm_task_state;
724
725 u32 msg_enable;
726 struct list_head eh_done_q;
727 wait_queue_head_t eh_wait_q;
728 int eh_tries;
729 struct completion park_req_pending;
730
731 pm_message_t pm_mesg;
732 int *pm_result;
733 enum link_pm pm_policy;
734
735 struct timer_list fastdrain_timer;
736 unsigned long fastdrain_cnt;
737
738 int em_message_type;
739 void *private_data;
740
741 #ifdef CONFIG_ATA_ACPI
742 acpi_handle acpi_handle;
743 struct ata_acpi_gtm __acpi_init_gtm; /* use ata_acpi_init_gtm() */
744 #endif
745 u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */
746 };
747
748 /* The following initializer overrides a method to NULL whether one of
749 * its parent has the method defined or not. This is equivalent to
750 * ERR_PTR(-ENOENT). Unfortunately, ERR_PTR doesn't render a constant
751 * expression and thus can't be used as an initializer.
752 */
753 #define ATA_OP_NULL (void *)(unsigned long)(-ENOENT)
754
755 struct ata_port_operations {
756 /*
757 * Command execution
758 */
759 int (*qc_defer)(struct ata_queued_cmd *qc);
760 int (*check_atapi_dma)(struct ata_queued_cmd *qc);
761 void (*qc_prep)(struct ata_queued_cmd *qc);
762 unsigned int (*qc_issue)(struct ata_queued_cmd *qc);
763 bool (*qc_fill_rtf)(struct ata_queued_cmd *qc);
764
765 /*
766 * Configuration and exception handling
767 */
768 int (*cable_detect)(struct ata_port *ap);
769 unsigned long (*mode_filter)(struct ata_device *dev, unsigned long xfer_mask);
770 void (*set_piomode)(struct ata_port *ap, struct ata_device *dev);
771 void (*set_dmamode)(struct ata_port *ap, struct ata_device *dev);
772 int (*set_mode)(struct ata_link *link, struct ata_device **r_failed_dev);
773 unsigned int (*read_id)(struct ata_device *dev, struct ata_taskfile *tf, u16 *id);
774
775 void (*dev_config)(struct ata_device *dev);
776
777 void (*freeze)(struct ata_port *ap);
778 void (*thaw)(struct ata_port *ap);
779 ata_prereset_fn_t prereset;
780 ata_reset_fn_t softreset;
781 ata_reset_fn_t hardreset;
782 ata_postreset_fn_t postreset;
783 ata_prereset_fn_t pmp_prereset;
784 ata_reset_fn_t pmp_softreset;
785 ata_reset_fn_t pmp_hardreset;
786 ata_postreset_fn_t pmp_postreset;
787 void (*error_handler)(struct ata_port *ap);
788 void (*post_internal_cmd)(struct ata_queued_cmd *qc);
789
790 /*
791 * Optional features
792 */
793 int (*scr_read)(struct ata_link *link, unsigned int sc_reg, u32 *val);
794 int (*scr_write)(struct ata_link *link, unsigned int sc_reg, u32 val);
795 void (*pmp_attach)(struct ata_port *ap);
796 void (*pmp_detach)(struct ata_port *ap);
797 int (*enable_pm)(struct ata_port *ap, enum link_pm policy);
798 void (*disable_pm)(struct ata_port *ap);
799
800 /*
801 * Start, stop, suspend and resume
802 */
803 int (*port_suspend)(struct ata_port *ap, pm_message_t mesg);
804 int (*port_resume)(struct ata_port *ap);
805 int (*port_start)(struct ata_port *ap);
806 void (*port_stop)(struct ata_port *ap);
807 void (*host_stop)(struct ata_host *host);
808
809 #ifdef CONFIG_ATA_SFF
810 /*
811 * SFF / taskfile oriented ops
812 */
813 void (*sff_dev_select)(struct ata_port *ap, unsigned int device);
814 u8 (*sff_check_status)(struct ata_port *ap);
815 u8 (*sff_check_altstatus)(struct ata_port *ap);
816 void (*sff_tf_load)(struct ata_port *ap, const struct ata_taskfile *tf);
817 void (*sff_tf_read)(struct ata_port *ap, struct ata_taskfile *tf);
818 void (*sff_exec_command)(struct ata_port *ap,
819 const struct ata_taskfile *tf);
820 unsigned int (*sff_data_xfer)(struct ata_device *dev,
821 unsigned char *buf, unsigned int buflen, int rw);
822 u8 (*sff_irq_on)(struct ata_port *);
823 void (*sff_irq_clear)(struct ata_port *);
824
825 void (*bmdma_setup)(struct ata_queued_cmd *qc);
826 void (*bmdma_start)(struct ata_queued_cmd *qc);
827 void (*bmdma_stop)(struct ata_queued_cmd *qc);
828 u8 (*bmdma_status)(struct ata_port *ap);
829 #endif /* CONFIG_ATA_SFF */
830
831 ssize_t (*em_show)(struct ata_port *ap, char *buf);
832 ssize_t (*em_store)(struct ata_port *ap, const char *message,
833 size_t size);
834 ssize_t (*sw_activity_show)(struct ata_device *dev, char *buf);
835 ssize_t (*sw_activity_store)(struct ata_device *dev,
836 enum sw_activity val);
837 /*
838 * Obsolete
839 */
840 void (*phy_reset)(struct ata_port *ap);
841 void (*eng_timeout)(struct ata_port *ap);
842
843 /*
844 * ->inherits must be the last field and all the preceding
845 * fields must be pointers.
846 */
847 const struct ata_port_operations *inherits;
848 };
849
850 struct ata_port_info {
851 unsigned long flags;
852 unsigned long link_flags;
853 unsigned long pio_mask;
854 unsigned long mwdma_mask;
855 unsigned long udma_mask;
856 struct ata_port_operations *port_ops;
857 void *private_data;
858 };
859
860 struct ata_timing {
861 unsigned short mode; /* ATA mode */
862 unsigned short setup; /* t1 */
863 unsigned short act8b; /* t2 for 8-bit I/O */
864 unsigned short rec8b; /* t2i for 8-bit I/O */
865 unsigned short cyc8b; /* t0 for 8-bit I/O */
866 unsigned short active; /* t2 or tD */
867 unsigned short recover; /* t2i or tK */
868 unsigned short cycle; /* t0 */
869 unsigned short udma; /* t2CYCTYP/2 */
870 };
871
872 /*
873 * Core layer - drivers/ata/libata-core.c
874 */
875 extern const unsigned long sata_deb_timing_normal[];
876 extern const unsigned long sata_deb_timing_hotplug[];
877 extern const unsigned long sata_deb_timing_long[];
878
879 extern struct ata_port_operations ata_dummy_port_ops;
880 extern const struct ata_port_info ata_dummy_port_info;
881
882 static inline const unsigned long *
883 sata_ehc_deb_timing(struct ata_eh_context *ehc)
884 {
885 if (ehc->i.flags & ATA_EHI_HOTPLUGGED)
886 return sata_deb_timing_hotplug;
887 else
888 return sata_deb_timing_normal;
889 }
890
891 static inline int ata_port_is_dummy(struct ata_port *ap)
892 {
893 return ap->ops == &ata_dummy_port_ops;
894 }
895
896 extern void ata_port_probe(struct ata_port *);
897 extern int sata_set_spd(struct ata_link *link);
898 extern int ata_std_prereset(struct ata_link *link, unsigned long deadline);
899 extern int ata_wait_after_reset(struct ata_link *link, unsigned long deadline,
900 int (*check_ready)(struct ata_link *link));
901 extern int sata_link_debounce(struct ata_link *link,
902 const unsigned long *params, unsigned long deadline);
903 extern int sata_link_resume(struct ata_link *link, const unsigned long *params,
904 unsigned long deadline);
905 extern int sata_link_hardreset(struct ata_link *link,
906 const unsigned long *timing, unsigned long deadline,
907 bool *online, int (*check_ready)(struct ata_link *));
908 extern int sata_std_hardreset(struct ata_link *link, unsigned int *class,
909 unsigned long deadline);
910 extern void ata_std_postreset(struct ata_link *link, unsigned int *classes);
911 extern void ata_port_disable(struct ata_port *);
912
913 extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports);
914 extern struct ata_host *ata_host_alloc_pinfo(struct device *dev,
915 const struct ata_port_info * const * ppi, int n_ports);
916 extern int ata_slave_link_init(struct ata_port *ap);
917 extern int ata_host_start(struct ata_host *host);
918 extern int ata_host_register(struct ata_host *host,
919 struct scsi_host_template *sht);
920 extern int ata_host_activate(struct ata_host *host, int irq,
921 irq_handler_t irq_handler, unsigned long irq_flags,
922 struct scsi_host_template *sht);
923 extern void ata_host_detach(struct ata_host *host);
924 extern void ata_host_init(struct ata_host *, struct device *,
925 unsigned long, struct ata_port_operations *);
926 extern int ata_scsi_detect(struct scsi_host_template *sht);
927 extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
928 extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *));
929 extern void ata_sas_port_destroy(struct ata_port *);
930 extern struct ata_port *ata_sas_port_alloc(struct ata_host *,
931 struct ata_port_info *, struct Scsi_Host *);
932 extern int ata_sas_port_init(struct ata_port *);
933 extern int ata_sas_port_start(struct ata_port *ap);
934 extern void ata_sas_port_stop(struct ata_port *ap);
935 extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *);
936 extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
937 struct ata_port *ap);
938 extern int sata_scr_valid(struct ata_link *link);
939 extern int sata_scr_read(struct ata_link *link, int reg, u32 *val);
940 extern int sata_scr_write(struct ata_link *link, int reg, u32 val);
941 extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val);
942 extern bool ata_link_online(struct ata_link *link);
943 extern bool ata_link_offline(struct ata_link *link);
944 #ifdef CONFIG_PM
945 extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg);
946 extern void ata_host_resume(struct ata_host *host);
947 #endif
948 extern int ata_ratelimit(void);
949 extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
950 unsigned long interval, unsigned long timeout);
951 extern int atapi_cmd_type(u8 opcode);
952 extern void ata_tf_to_fis(const struct ata_taskfile *tf,
953 u8 pmp, int is_cmd, u8 *fis);
954 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
955 extern unsigned long ata_pack_xfermask(unsigned long pio_mask,
956 unsigned long mwdma_mask, unsigned long udma_mask);
957 extern void ata_unpack_xfermask(unsigned long xfer_mask,
958 unsigned long *pio_mask, unsigned long *mwdma_mask,
959 unsigned long *udma_mask);
960 extern u8 ata_xfer_mask2mode(unsigned long xfer_mask);
961 extern unsigned long ata_xfer_mode2mask(u8 xfer_mode);
962 extern int ata_xfer_mode2shift(unsigned long xfer_mode);
963 extern const char *ata_mode_string(unsigned long xfer_mask);
964 extern unsigned long ata_id_xfermask(const u16 *id);
965 extern int ata_port_start(struct ata_port *ap);
966 extern int ata_std_qc_defer(struct ata_queued_cmd *qc);
967 extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
968 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
969 unsigned int n_elem);
970 extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
971 extern void ata_dev_disable(struct ata_device *adev);
972 extern void ata_id_string(const u16 *id, unsigned char *s,
973 unsigned int ofs, unsigned int len);
974 extern void ata_id_c_string(const u16 *id, unsigned char *s,
975 unsigned int ofs, unsigned int len);
976 extern unsigned int ata_do_dev_read_id(struct ata_device *dev,
977 struct ata_taskfile *tf, u16 *id);
978 extern void ata_qc_complete(struct ata_queued_cmd *qc);
979 extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active);
980 extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
981 void (*done)(struct scsi_cmnd *));
982 extern int ata_std_bios_param(struct scsi_device *sdev,
983 struct block_device *bdev,
984 sector_t capacity, int geom[]);
985 extern int ata_scsi_slave_config(struct scsi_device *sdev);
986 extern void ata_scsi_slave_destroy(struct scsi_device *sdev);
987 extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
988 int queue_depth);
989 extern struct ata_device *ata_dev_pair(struct ata_device *adev);
990 extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev);
991
992 extern int ata_cable_40wire(struct ata_port *ap);
993 extern int ata_cable_80wire(struct ata_port *ap);
994 extern int ata_cable_sata(struct ata_port *ap);
995 extern int ata_cable_ignore(struct ata_port *ap);
996 extern int ata_cable_unknown(struct ata_port *ap);
997
998 /* Timing helpers */
999 extern unsigned int ata_pio_need_iordy(const struct ata_device *);
1000 extern const struct ata_timing *ata_timing_find_mode(u8 xfer_mode);
1001 extern int ata_timing_compute(struct ata_device *, unsigned short,
1002 struct ata_timing *, int, int);
1003 extern void ata_timing_merge(const struct ata_timing *,
1004 const struct ata_timing *, struct ata_timing *,
1005 unsigned int);
1006 extern u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle);
1007
1008 /* PCI */
1009 #ifdef CONFIG_PCI
1010 struct pci_dev;
1011
1012 struct pci_bits {
1013 unsigned int reg; /* PCI config register to read */
1014 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
1015 unsigned long mask;
1016 unsigned long val;
1017 };
1018
1019 extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
1020 extern void ata_pci_remove_one(struct pci_dev *pdev);
1021
1022 #ifdef CONFIG_PM
1023 extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg);
1024 extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev);
1025 extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
1026 extern int ata_pci_device_resume(struct pci_dev *pdev);
1027 #endif /* CONFIG_PM */
1028 #endif /* CONFIG_PCI */
1029
1030 /*
1031 * ACPI - drivers/ata/libata-acpi.c
1032 */
1033 #ifdef CONFIG_ATA_ACPI
1034 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
1035 {
1036 if (ap->pflags & ATA_PFLAG_INIT_GTM_VALID)
1037 return &ap->__acpi_init_gtm;
1038 return NULL;
1039 }
1040 int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm);
1041 int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *stm);
1042 unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev,
1043 const struct ata_acpi_gtm *gtm);
1044 int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm);
1045 #else
1046 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
1047 {
1048 return NULL;
1049 }
1050
1051 static inline int ata_acpi_stm(const struct ata_port *ap,
1052 struct ata_acpi_gtm *stm)
1053 {
1054 return -ENOSYS;
1055 }
1056
1057 static inline int ata_acpi_gtm(const struct ata_port *ap,
1058 struct ata_acpi_gtm *stm)
1059 {
1060 return -ENOSYS;
1061 }
1062
1063 static inline unsigned int ata_acpi_gtm_xfermask(struct ata_device *dev,
1064 const struct ata_acpi_gtm *gtm)
1065 {
1066 return 0;
1067 }
1068
1069 static inline int ata_acpi_cbl_80wire(struct ata_port *ap,
1070 const struct ata_acpi_gtm *gtm)
1071 {
1072 return 0;
1073 }
1074 #endif
1075
1076 /*
1077 * EH - drivers/ata/libata-eh.c
1078 */
1079 extern void ata_port_schedule_eh(struct ata_port *ap);
1080 extern int ata_link_abort(struct ata_link *link);
1081 extern int ata_port_abort(struct ata_port *ap);
1082 extern int ata_port_freeze(struct ata_port *ap);
1083 extern int sata_async_notification(struct ata_port *ap);
1084
1085 extern void ata_eh_freeze_port(struct ata_port *ap);
1086 extern void ata_eh_thaw_port(struct ata_port *ap);
1087
1088 extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
1089 extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
1090 extern void ata_eh_analyze_ncq_error(struct ata_link *link);
1091
1092 extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
1093 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
1094 ata_postreset_fn_t postreset);
1095 extern void ata_std_error_handler(struct ata_port *ap);
1096
1097 /*
1098 * Base operations to inherit from and initializers for sht
1099 *
1100 * Operations
1101 *
1102 * base : Common to all libata drivers.
1103 * sata : SATA controllers w/ native interface.
1104 * pmp : SATA controllers w/ PMP support.
1105 * sff : SFF ATA controllers w/o BMDMA support.
1106 * bmdma : SFF ATA controllers w/ BMDMA support.
1107 *
1108 * sht initializers
1109 *
1110 * BASE : Common to all libata drivers. The user must set
1111 * sg_tablesize and dma_boundary.
1112 * PIO : SFF ATA controllers w/ only PIO support.
1113 * BMDMA : SFF ATA controllers w/ BMDMA support. sg_tablesize and
1114 * dma_boundary are set to BMDMA limits.
1115 * NCQ : SATA controllers supporting NCQ. The user must set
1116 * sg_tablesize, dma_boundary and can_queue.
1117 */
1118 extern const struct ata_port_operations ata_base_port_ops;
1119 extern const struct ata_port_operations sata_port_ops;
1120 extern struct device_attribute *ata_common_sdev_attrs[];
1121
1122 #define ATA_BASE_SHT(drv_name) \
1123 .module = THIS_MODULE, \
1124 .name = drv_name, \
1125 .ioctl = ata_scsi_ioctl, \
1126 .queuecommand = ata_scsi_queuecmd, \
1127 .can_queue = ATA_DEF_QUEUE, \
1128 .this_id = ATA_SHT_THIS_ID, \
1129 .cmd_per_lun = ATA_SHT_CMD_PER_LUN, \
1130 .emulated = ATA_SHT_EMULATED, \
1131 .use_clustering = ATA_SHT_USE_CLUSTERING, \
1132 .proc_name = drv_name, \
1133 .slave_configure = ata_scsi_slave_config, \
1134 .slave_destroy = ata_scsi_slave_destroy, \
1135 .bios_param = ata_std_bios_param, \
1136 .sdev_attrs = ata_common_sdev_attrs
1137
1138 #define ATA_NCQ_SHT(drv_name) \
1139 ATA_BASE_SHT(drv_name), \
1140 .change_queue_depth = ata_scsi_change_queue_depth
1141
1142 /*
1143 * PMP helpers
1144 */
1145 #ifdef CONFIG_SATA_PMP
1146 static inline bool sata_pmp_supported(struct ata_port *ap)
1147 {
1148 return ap->flags & ATA_FLAG_PMP;
1149 }
1150
1151 static inline bool sata_pmp_attached(struct ata_port *ap)
1152 {
1153 return ap->nr_pmp_links != 0;
1154 }
1155
1156 static inline int ata_is_host_link(const struct ata_link *link)
1157 {
1158 return link == &link->ap->link || link == link->ap->slave_link;
1159 }
1160 #else /* CONFIG_SATA_PMP */
1161 static inline bool sata_pmp_supported(struct ata_port *ap)
1162 {
1163 return false;
1164 }
1165
1166 static inline bool sata_pmp_attached(struct ata_port *ap)
1167 {
1168 return false;
1169 }
1170
1171 static inline int ata_is_host_link(const struct ata_link *link)
1172 {
1173 return 1;
1174 }
1175 #endif /* CONFIG_SATA_PMP */
1176
1177 static inline int sata_srst_pmp(struct ata_link *link)
1178 {
1179 if (sata_pmp_supported(link->ap) && ata_is_host_link(link))
1180 return SATA_PMP_CTRL_PORT;
1181 return link->pmp;
1182 }
1183
1184 /*
1185 * printk helpers
1186 */
1187 #define ata_port_printk(ap, lv, fmt, args...) \
1188 printk("%sata%u: "fmt, lv, (ap)->print_id , ##args)
1189
1190 #define ata_link_printk(link, lv, fmt, args...) do { \
1191 if (sata_pmp_attached((link)->ap) || (link)->ap->slave_link) \
1192 printk("%sata%u.%02u: "fmt, lv, (link)->ap->print_id, \
1193 (link)->pmp , ##args); \
1194 else \
1195 printk("%sata%u: "fmt, lv, (link)->ap->print_id , ##args); \
1196 } while(0)
1197
1198 #define ata_dev_printk(dev, lv, fmt, args...) \
1199 printk("%sata%u.%02u: "fmt, lv, (dev)->link->ap->print_id, \
1200 (dev)->link->pmp + (dev)->devno , ##args)
1201
1202 /*
1203 * ata_eh_info helpers
1204 */
1205 extern void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...)
1206 __attribute__ ((format (printf, 2, 3)));
1207 extern void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...)
1208 __attribute__ ((format (printf, 2, 3)));
1209 extern void ata_ehi_clear_desc(struct ata_eh_info *ehi);
1210
1211 static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
1212 {
1213 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
1214 ehi->flags |= ATA_EHI_HOTPLUGGED;
1215 ehi->action |= ATA_EH_RESET | ATA_EH_ENABLE_LINK;
1216 ehi->err_mask |= AC_ERR_ATA_BUS;
1217 }
1218
1219 /*
1220 * port description helpers
1221 */
1222 extern void ata_port_desc(struct ata_port *ap, const char *fmt, ...)
1223 __attribute__ ((format (printf, 2, 3)));
1224 #ifdef CONFIG_PCI
1225 extern void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset,
1226 const char *name);
1227 #endif
1228
1229 static inline unsigned int ata_tag_valid(unsigned int tag)
1230 {
1231 return (tag < ATA_MAX_QUEUE) ? 1 : 0;
1232 }
1233
1234 static inline unsigned int ata_tag_internal(unsigned int tag)
1235 {
1236 return tag == ATA_TAG_INTERNAL;
1237 }
1238
1239 /*
1240 * device helpers
1241 */
1242 static inline unsigned int ata_class_enabled(unsigned int class)
1243 {
1244 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI ||
1245 class == ATA_DEV_PMP || class == ATA_DEV_SEMB;
1246 }
1247
1248 static inline unsigned int ata_class_disabled(unsigned int class)
1249 {
1250 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP ||
1251 class == ATA_DEV_PMP_UNSUP || class == ATA_DEV_SEMB_UNSUP;
1252 }
1253
1254 static inline unsigned int ata_class_absent(unsigned int class)
1255 {
1256 return !ata_class_enabled(class) && !ata_class_disabled(class);
1257 }
1258
1259 static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
1260 {
1261 return ata_class_enabled(dev->class);
1262 }
1263
1264 static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
1265 {
1266 return ata_class_disabled(dev->class);
1267 }
1268
1269 static inline unsigned int ata_dev_absent(const struct ata_device *dev)
1270 {
1271 return ata_class_absent(dev->class);
1272 }
1273
1274 /*
1275 * link helpers
1276 */
1277 static inline int ata_link_max_devices(const struct ata_link *link)
1278 {
1279 if (ata_is_host_link(link) && link->ap->flags & ATA_FLAG_SLAVE_POSS)
1280 return 2;
1281 return 1;
1282 }
1283
1284 static inline int ata_link_active(struct ata_link *link)
1285 {
1286 return ata_tag_valid(link->active_tag) || link->sactive;
1287 }
1288
1289 /*
1290 * Iterators
1291 *
1292 * ATA_LITER_* constants are used to select link iteration mode and
1293 * ATA_DITER_* device iteration mode.
1294 *
1295 * For a custom iteration directly using ata_{link|dev}_next(), if
1296 * @link or @dev, respectively, is NULL, the first element is
1297 * returned. @dev and @link can be any valid device or link and the
1298 * next element according to the iteration mode will be returned.
1299 * After the last element, NULL is returned.
1300 */
1301 enum ata_link_iter_mode {
1302 ATA_LITER_EDGE, /* if present, PMP links only; otherwise,
1303 * host link. no slave link */
1304 ATA_LITER_HOST_FIRST, /* host link followed by PMP or slave links */
1305 ATA_LITER_PMP_FIRST, /* PMP links followed by host link,
1306 * slave link still comes after host link */
1307 };
1308
1309 enum ata_dev_iter_mode {
1310 ATA_DITER_ENABLED,
1311 ATA_DITER_ENABLED_REVERSE,
1312 ATA_DITER_ALL,
1313 ATA_DITER_ALL_REVERSE,
1314 };
1315
1316 extern struct ata_link *ata_link_next(struct ata_link *link,
1317 struct ata_port *ap,
1318 enum ata_link_iter_mode mode);
1319
1320 extern struct ata_device *ata_dev_next(struct ata_device *dev,
1321 struct ata_link *link,
1322 enum ata_dev_iter_mode mode);
1323
1324 /*
1325 * Shortcut notation for iterations
1326 *
1327 * ata_for_each_link() iterates over each link of @ap according to
1328 * @mode. @link points to the current link in the loop. @link is
1329 * NULL after loop termination. ata_for_each_dev() works the same way
1330 * except that it iterates over each device of @link.
1331 *
1332 * Note that the mode prefixes ATA_{L|D}ITER_ shouldn't need to be
1333 * specified when using the following shorthand notations. Only the
1334 * mode itself (EDGE, HOST_FIRST, ENABLED, etc...) should be
1335 * specified. This not only increases brevity but also makes it
1336 * impossible to use ATA_LITER_* for device iteration or vice-versa.
1337 */
1338 #define ata_for_each_link(link, ap, mode) \
1339 for ((link) = ata_link_next(NULL, (ap), ATA_LITER_##mode); (link); \
1340 (link) = ata_link_next((link), (ap), ATA_LITER_##mode))
1341
1342 #define ata_for_each_dev(dev, link, mode) \
1343 for ((dev) = ata_dev_next(NULL, (link), ATA_DITER_##mode); (dev); \
1344 (dev) = ata_dev_next((dev), (link), ATA_DITER_##mode))
1345
1346 /**
1347 * ata_ncq_enabled - Test whether NCQ is enabled
1348 * @dev: ATA device to test for
1349 *
1350 * LOCKING:
1351 * spin_lock_irqsave(host lock)
1352 *
1353 * RETURNS:
1354 * 1 if NCQ is enabled for @dev, 0 otherwise.
1355 */
1356 static inline int ata_ncq_enabled(struct ata_device *dev)
1357 {
1358 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF |
1359 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ;
1360 }
1361
1362 static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
1363 {
1364 qc->tf.ctl |= ATA_NIEN;
1365 }
1366
1367 static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap,
1368 unsigned int tag)
1369 {
1370 if (likely(ata_tag_valid(tag)))
1371 return &ap->qcmd[tag];
1372 return NULL;
1373 }
1374
1375 static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap,
1376 unsigned int tag)
1377 {
1378 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
1379
1380 if (unlikely(!qc) || !ap->ops->error_handler)
1381 return qc;
1382
1383 if ((qc->flags & (ATA_QCFLAG_ACTIVE |
1384 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE)
1385 return qc;
1386
1387 return NULL;
1388 }
1389
1390 static inline unsigned int ata_qc_raw_nbytes(struct ata_queued_cmd *qc)
1391 {
1392 return qc->nbytes - min(qc->extrabytes, qc->nbytes);
1393 }
1394
1395 static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
1396 {
1397 memset(tf, 0, sizeof(*tf));
1398
1399 tf->ctl = dev->link->ap->ctl;
1400 if (dev->devno == 0)
1401 tf->device = ATA_DEVICE_OBS;
1402 else
1403 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
1404 }
1405
1406 static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
1407 {
1408 qc->dma_dir = DMA_NONE;
1409 qc->sg = NULL;
1410 qc->flags = 0;
1411 qc->cursg = NULL;
1412 qc->cursg_ofs = 0;
1413 qc->nbytes = qc->extrabytes = qc->curbytes = 0;
1414 qc->n_elem = 0;
1415 qc->err_mask = 0;
1416 qc->sect_size = ATA_SECT_SIZE;
1417
1418 ata_tf_init(qc->dev, &qc->tf);
1419
1420 /* init result_tf such that it indicates normal completion */
1421 qc->result_tf.command = ATA_DRDY;
1422 qc->result_tf.feature = 0;
1423 }
1424
1425 static inline int ata_try_flush_cache(const struct ata_device *dev)
1426 {
1427 return ata_id_wcache_enabled(dev->id) ||
1428 ata_id_has_flush(dev->id) ||
1429 ata_id_has_flush_ext(dev->id);
1430 }
1431
1432 static inline unsigned int ac_err_mask(u8 status)
1433 {
1434 if (status & (ATA_BUSY | ATA_DRQ))
1435 return AC_ERR_HSM;
1436 if (status & (ATA_ERR | ATA_DF))
1437 return AC_ERR_DEV;
1438 return 0;
1439 }
1440
1441 static inline unsigned int __ac_err_mask(u8 status)
1442 {
1443 unsigned int mask = ac_err_mask(status);
1444 if (mask == 0)
1445 return AC_ERR_OTHER;
1446 return mask;
1447 }
1448
1449 static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
1450 {
1451 return *(struct ata_port **)&host->hostdata[0];
1452 }
1453
1454 static inline int ata_check_ready(u8 status)
1455 {
1456 if (!(status & ATA_BUSY))
1457 return 1;
1458
1459 /* 0xff indicates either no device or device not ready */
1460 if (status == 0xff)
1461 return -ENODEV;
1462
1463 return 0;
1464 }
1465
1466 static inline unsigned long ata_deadline(unsigned long from_jiffies,
1467 unsigned long timeout_msecs)
1468 {
1469 return from_jiffies + msecs_to_jiffies(timeout_msecs);
1470 }
1471
1472 /* Don't open code these in drivers as there are traps. Firstly the range may
1473 change in future hardware and specs, secondly 0xFF means 'no DMA' but is
1474 > UDMA_0. Dyma ddreigiau */
1475
1476 static inline int ata_using_mwdma(struct ata_device *adev)
1477 {
1478 if (adev->dma_mode >= XFER_MW_DMA_0 && adev->dma_mode <= XFER_MW_DMA_4)
1479 return 1;
1480 return 0;
1481 }
1482
1483 static inline int ata_using_udma(struct ata_device *adev)
1484 {
1485 if (adev->dma_mode >= XFER_UDMA_0 && adev->dma_mode <= XFER_UDMA_7)
1486 return 1;
1487 return 0;
1488 }
1489
1490 static inline int ata_dma_enabled(struct ata_device *adev)
1491 {
1492 return (adev->dma_mode == 0xFF ? 0 : 1);
1493 }
1494
1495 /**************************************************************************
1496 * PMP - drivers/ata/libata-pmp.c
1497 */
1498 #ifdef CONFIG_SATA_PMP
1499
1500 extern const struct ata_port_operations sata_pmp_port_ops;
1501
1502 extern int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc);
1503 extern void sata_pmp_error_handler(struct ata_port *ap);
1504
1505 #else /* CONFIG_SATA_PMP */
1506
1507 #define sata_pmp_port_ops sata_port_ops
1508 #define sata_pmp_qc_defer_cmd_switch ata_std_qc_defer
1509 #define sata_pmp_error_handler ata_std_error_handler
1510
1511 #endif /* CONFIG_SATA_PMP */
1512
1513
1514 /**************************************************************************
1515 * SFF - drivers/ata/libata-sff.c
1516 */
1517 #ifdef CONFIG_ATA_SFF
1518
1519 extern const struct ata_port_operations ata_sff_port_ops;
1520 extern const struct ata_port_operations ata_bmdma_port_ops;
1521
1522 /* PIO only, sg_tablesize and dma_boundary limits can be removed */
1523 #define ATA_PIO_SHT(drv_name) \
1524 ATA_BASE_SHT(drv_name), \
1525 .sg_tablesize = LIBATA_MAX_PRD, \
1526 .dma_boundary = ATA_DMA_BOUNDARY
1527
1528 #define ATA_BMDMA_SHT(drv_name) \
1529 ATA_BASE_SHT(drv_name), \
1530 .sg_tablesize = LIBATA_MAX_PRD, \
1531 .dma_boundary = ATA_DMA_BOUNDARY
1532
1533 extern void ata_sff_qc_prep(struct ata_queued_cmd *qc);
1534 extern void ata_sff_dumb_qc_prep(struct ata_queued_cmd *qc);
1535 extern void ata_sff_dev_select(struct ata_port *ap, unsigned int device);
1536 extern u8 ata_sff_check_status(struct ata_port *ap);
1537 extern void ata_sff_pause(struct ata_port *ap);
1538 extern void ata_sff_dma_pause(struct ata_port *ap);
1539 extern int ata_sff_busy_sleep(struct ata_port *ap,
1540 unsigned long timeout_pat, unsigned long timeout);
1541 extern int ata_sff_wait_ready(struct ata_link *link, unsigned long deadline);
1542 extern void ata_sff_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
1543 extern void ata_sff_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
1544 extern void ata_sff_exec_command(struct ata_port *ap,
1545 const struct ata_taskfile *tf);
1546 extern unsigned int ata_sff_data_xfer(struct ata_device *dev,
1547 unsigned char *buf, unsigned int buflen, int rw);
1548 extern unsigned int ata_sff_data_xfer_noirq(struct ata_device *dev,
1549 unsigned char *buf, unsigned int buflen, int rw);
1550 extern u8 ata_sff_irq_on(struct ata_port *ap);
1551 extern void ata_sff_irq_clear(struct ata_port *ap);
1552 extern int ata_sff_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
1553 u8 status, int in_wq);
1554 extern unsigned int ata_sff_qc_issue(struct ata_queued_cmd *qc);
1555 extern bool ata_sff_qc_fill_rtf(struct ata_queued_cmd *qc);
1556 extern unsigned int ata_sff_host_intr(struct ata_port *ap,
1557 struct ata_queued_cmd *qc);
1558 extern irqreturn_t ata_sff_interrupt(int irq, void *dev_instance);
1559 extern void ata_sff_freeze(struct ata_port *ap);
1560 extern void ata_sff_thaw(struct ata_port *ap);
1561 extern int ata_sff_prereset(struct ata_link *link, unsigned long deadline);
1562 extern unsigned int ata_sff_dev_classify(struct ata_device *dev, int present,
1563 u8 *r_err);
1564 extern int ata_sff_wait_after_reset(struct ata_link *link, unsigned int devmask,
1565 unsigned long deadline);
1566 extern int ata_sff_softreset(struct ata_link *link, unsigned int *classes,
1567 unsigned long deadline);
1568 extern int sata_sff_hardreset(struct ata_link *link, unsigned int *class,
1569 unsigned long deadline);
1570 extern void ata_sff_postreset(struct ata_link *link, unsigned int *classes);
1571 extern void ata_sff_error_handler(struct ata_port *ap);
1572 extern void ata_sff_post_internal_cmd(struct ata_queued_cmd *qc);
1573 extern int ata_sff_port_start(struct ata_port *ap);
1574 extern void ata_sff_std_ports(struct ata_ioports *ioaddr);
1575 extern unsigned long ata_bmdma_mode_filter(struct ata_device *dev,
1576 unsigned long xfer_mask);
1577 extern void ata_bmdma_setup(struct ata_queued_cmd *qc);
1578 extern void ata_bmdma_start(struct ata_queued_cmd *qc);
1579 extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
1580 extern u8 ata_bmdma_status(struct ata_port *ap);
1581 extern void ata_bus_reset(struct ata_port *ap);
1582
1583 #ifdef CONFIG_PCI
1584 extern int ata_pci_bmdma_clear_simplex(struct pci_dev *pdev);
1585 extern int ata_pci_bmdma_init(struct ata_host *host);
1586 extern int ata_pci_sff_init_host(struct ata_host *host);
1587 extern int ata_pci_sff_prepare_host(struct pci_dev *pdev,
1588 const struct ata_port_info * const * ppi,
1589 struct ata_host **r_host);
1590 extern int ata_pci_sff_activate_host(struct ata_host *host,
1591 irq_handler_t irq_handler,
1592 struct scsi_host_template *sht);
1593 extern int ata_pci_sff_init_one(struct pci_dev *pdev,
1594 const struct ata_port_info * const * ppi,
1595 struct scsi_host_template *sht, void *host_priv);
1596 #endif /* CONFIG_PCI */
1597
1598 /**
1599 * ata_sff_busy_wait - Wait for a port status register
1600 * @ap: Port to wait for.
1601 * @bits: bits that must be clear
1602 * @max: number of 10uS waits to perform
1603 *
1604 * Waits up to max*10 microseconds for the selected bits in the port's
1605 * status register to be cleared.
1606 * Returns final value of status register.
1607 *
1608 * LOCKING:
1609 * Inherited from caller.
1610 */
1611 static inline u8 ata_sff_busy_wait(struct ata_port *ap, unsigned int bits,
1612 unsigned int max)
1613 {
1614 u8 status;
1615
1616 do {
1617 udelay(10);
1618 status = ap->ops->sff_check_status(ap);
1619 max--;
1620 } while (status != 0xff && (status & bits) && (max > 0));
1621
1622 return status;
1623 }
1624
1625 /**
1626 * ata_wait_idle - Wait for a port to be idle.
1627 * @ap: Port to wait for.
1628 *
1629 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
1630 * Returns final value of status register.
1631 *
1632 * LOCKING:
1633 * Inherited from caller.
1634 */
1635 static inline u8 ata_wait_idle(struct ata_port *ap)
1636 {
1637 u8 status = ata_sff_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
1638
1639 #ifdef ATA_DEBUG
1640 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ)))
1641 ata_port_printk(ap, KERN_DEBUG, "abnormal Status 0x%X\n",
1642 status);
1643 #endif
1644
1645 return status;
1646 }
1647 #endif /* CONFIG_ATA_SFF */
1648
1649 #endif /* __LINUX_LIBATA_H__ */
Support for the Chinese Samsung S3C2440 based development boards