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cfq: fix recursive call in cfq_blkiocg_update_completion_stats()
[linux-2.6/kvm.git] / include / linux / libata.h
blobb85f3ff34d7d3d71cb99f0ded4db0ce186780b57
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_SLEEPING = (1 << 15), /* device is sleeping */
147 ATA_DFLAG_DUBIOUS_XFER = (1 << 16), /* data transfer not verified */
148 ATA_DFLAG_NO_UNLOAD = (1 << 17), /* device doesn't support unload */
149 ATA_DFLAG_UNLOCK_HPA = (1 << 18), /* unlock HPA */
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_NO_POWEROFF_SPINDOWN = (1 << 11), /* don't spindown before poweroff */
191 ATA_FLAG_NO_HIBERNATE_SPINDOWN = (1 << 12), /* don't spindown before hibernation */
192 ATA_FLAG_DEBUGMSG = (1 << 13),
193 ATA_FLAG_FPDMA_AA = (1 << 14), /* driver supports Auto-Activate */
194 ATA_FLAG_IGN_SIMPLEX = (1 << 15), /* ignore SIMPLEX */
195 ATA_FLAG_NO_IORDY = (1 << 16), /* controller lacks iordy */
196 ATA_FLAG_ACPI_SATA = (1 << 17), /* need native SATA ACPI layout */
197 ATA_FLAG_AN = (1 << 18), /* controller supports AN */
198 ATA_FLAG_PMP = (1 << 19), /* controller supports PMP */
199 ATA_FLAG_IPM = (1 << 20), /* driver can handle IPM */
200 ATA_FLAG_EM = (1 << 21), /* driver supports enclosure
201 * management */
202 ATA_FLAG_SW_ACTIVITY = (1 << 22), /* driver supports sw activity
203 * led */
204
205 /* bits 24:31 of ap->flags are reserved for LLD specific flags */
206
207
208 /* struct ata_port pflags */
209 ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */
210 ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */
211 ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */
212 ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */
213 ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */
214 ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */
215 ATA_PFLAG_INITIALIZING = (1 << 7), /* being initialized, don't touch */
216 ATA_PFLAG_RESETTING = (1 << 8), /* reset in progress */
217 ATA_PFLAG_UNLOADING = (1 << 9), /* driver is being unloaded */
218 ATA_PFLAG_UNLOADED = (1 << 10), /* driver is unloaded */
219
220 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */
221 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */
222 ATA_PFLAG_INIT_GTM_VALID = (1 << 19), /* initial gtm data valid */
223
224 ATA_PFLAG_PIO32 = (1 << 20), /* 32bit PIO */
225 ATA_PFLAG_PIO32CHANGE = (1 << 21), /* 32bit PIO can be turned on/off */
226
227 /* struct ata_queued_cmd flags */
228 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */
229 ATA_QCFLAG_DMAMAP = (1 << 1), /* SG table is DMA mapped */
230 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */
231 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */
232 ATA_QCFLAG_CLEAR_EXCL = (1 << 5), /* clear excl_link on completion */
233 ATA_QCFLAG_QUIET = (1 << 6), /* don't report device error */
234 ATA_QCFLAG_RETRY = (1 << 7), /* retry after failure */
235
236 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */
237 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */
238 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */
239
240 /* host set flags */
241 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */
242 ATA_HOST_STARTED = (1 << 1), /* Host started */
243 ATA_HOST_PARALLEL_SCAN = (1 << 2), /* Ports on this host can be scanned in parallel */
244
245 /* bits 24:31 of host->flags are reserved for LLD specific flags */
246
247 /* various lengths of time */
248 ATA_TMOUT_BOOT = 30000, /* heuristic */
249 ATA_TMOUT_BOOT_QUICK = 7000, /* heuristic */
250 ATA_TMOUT_INTERNAL_QUICK = 5000,
251 ATA_TMOUT_MAX_PARK = 30000,
252
253 /*
254 * GoVault needs 2s and iVDR disk HHD424020F7SV00 800ms. 2s
255 * is too much without parallel probing. Use 2s if parallel
256 * probing is available, 800ms otherwise.
257 */
258 ATA_TMOUT_FF_WAIT_LONG = 2000,
259 ATA_TMOUT_FF_WAIT = 800,
260
261 /* Spec mandates to wait for ">= 2ms" before checking status
262 * after reset. We wait 150ms, because that was the magic
263 * delay used for ATAPI devices in Hale Landis's ATADRVR, for
264 * the period of time between when the ATA command register is
265 * written, and then status is checked. Because waiting for
266 * "a while" before checking status is fine, post SRST, we
267 * perform this magic delay here as well.
268 *
269 * Old drivers/ide uses the 2mS rule and then waits for ready.
270 */
271 ATA_WAIT_AFTER_RESET = 150,
272
273 /* If PMP is supported, we have to do follow-up SRST. As some
274 * PMPs don't send D2H Reg FIS after hardreset, LLDs are
275 * advised to wait only for the following duration before
276 * doing SRST.
277 */
278 ATA_TMOUT_PMP_SRST_WAIT = 5000,
279
280 /* ATA bus states */
281 BUS_UNKNOWN = 0,
282 BUS_DMA = 1,
283 BUS_IDLE = 2,
284 BUS_NOINTR = 3,
285 BUS_NODATA = 4,
286 BUS_TIMER = 5,
287 BUS_PIO = 6,
288 BUS_EDD = 7,
289 BUS_IDENTIFY = 8,
290 BUS_PACKET = 9,
291
292 /* SATA port states */
293 PORT_UNKNOWN = 0,
294 PORT_ENABLED = 1,
295 PORT_DISABLED = 2,
296
297 /* encoding various smaller bitmaps into a single
298 * unsigned long bitmap
299 */
300 ATA_NR_PIO_MODES = 7,
301 ATA_NR_MWDMA_MODES = 5,
302 ATA_NR_UDMA_MODES = 8,
303
304 ATA_SHIFT_PIO = 0,
305 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_NR_PIO_MODES,
306 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_NR_MWDMA_MODES,
307
308 /* size of buffer to pad xfers ending on unaligned boundaries */
309 ATA_DMA_PAD_SZ = 4,
310
311 /* ering size */
312 ATA_ERING_SIZE = 32,
313
314 /* return values for ->qc_defer */
315 ATA_DEFER_LINK = 1,
316 ATA_DEFER_PORT = 2,
317
318 /* desc_len for ata_eh_info and context */
319 ATA_EH_DESC_LEN = 80,
320
321 /* reset / recovery action types */
322 ATA_EH_REVALIDATE = (1 << 0),
323 ATA_EH_SOFTRESET = (1 << 1), /* meaningful only in ->prereset */
324 ATA_EH_HARDRESET = (1 << 2), /* meaningful only in ->prereset */
325 ATA_EH_RESET = ATA_EH_SOFTRESET | ATA_EH_HARDRESET,
326 ATA_EH_ENABLE_LINK = (1 << 3),
327 ATA_EH_LPM = (1 << 4), /* link power management action */
328 ATA_EH_PARK = (1 << 5), /* unload heads and stop I/O */
329
330 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE | ATA_EH_PARK,
331 ATA_EH_ALL_ACTIONS = ATA_EH_REVALIDATE | ATA_EH_RESET |
332 ATA_EH_ENABLE_LINK | ATA_EH_LPM,
333
334 /* ata_eh_info->flags */
335 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */
336 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */
337 ATA_EHI_QUIET = (1 << 3), /* be quiet */
338
339 ATA_EHI_DID_SOFTRESET = (1 << 16), /* already soft-reset this port */
340 ATA_EHI_DID_HARDRESET = (1 << 17), /* already soft-reset this port */
341 ATA_EHI_PRINTINFO = (1 << 18), /* print configuration info */
342 ATA_EHI_SETMODE = (1 << 19), /* configure transfer mode */
343 ATA_EHI_POST_SETMODE = (1 << 20), /* revaildating after setmode */
344
345 ATA_EHI_DID_RESET = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET,
346
347 /* mask of flags to transfer *to* the slave link */
348 ATA_EHI_TO_SLAVE_MASK = ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET,
349
350 /* max tries if error condition is still set after ->error_handler */
351 ATA_EH_MAX_TRIES = 5,
352
353 /* sometimes resuming a link requires several retries */
354 ATA_LINK_RESUME_TRIES = 5,
355
356 /* how hard are we gonna try to probe/recover devices */
357 ATA_PROBE_MAX_TRIES = 3,
358 ATA_EH_DEV_TRIES = 3,
359 ATA_EH_PMP_TRIES = 5,
360 ATA_EH_PMP_LINK_TRIES = 3,
361
362 SATA_PMP_RW_TIMEOUT = 3000, /* PMP read/write timeout */
363
364 /* This should match the actual table size of
365 * ata_eh_cmd_timeout_table in libata-eh.c.
366 */
367 ATA_EH_CMD_TIMEOUT_TABLE_SIZE = 6,
368
369 /* Horkage types. May be set by libata or controller on drives
370 (some horkage may be drive/controller pair dependant */
371
372 ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */
373 ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */
374 ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */
375 ATA_HORKAGE_MAX_SEC_128 = (1 << 3), /* Limit max sects to 128 */
376 ATA_HORKAGE_BROKEN_HPA = (1 << 4), /* Broken HPA */
377 ATA_HORKAGE_DISABLE = (1 << 5), /* Disable it */
378 ATA_HORKAGE_HPA_SIZE = (1 << 6), /* native size off by one */
379 ATA_HORKAGE_IPM = (1 << 7), /* Link PM problems */
380 ATA_HORKAGE_IVB = (1 << 8), /* cbl det validity bit bugs */
381 ATA_HORKAGE_STUCK_ERR = (1 << 9), /* stuck ERR on next PACKET */
382 ATA_HORKAGE_BRIDGE_OK = (1 << 10), /* no bridge limits */
383 ATA_HORKAGE_ATAPI_MOD16_DMA = (1 << 11), /* use ATAPI DMA for commands
384 not multiple of 16 bytes */
385 ATA_HORKAGE_FIRMWARE_WARN = (1 << 12), /* firmware update warning */
386 ATA_HORKAGE_1_5_GBPS = (1 << 13), /* force 1.5 Gbps */
387 ATA_HORKAGE_NOSETXFER = (1 << 14), /* skip SETXFER, SATA only */
388 ATA_HORKAGE_BROKEN_FPDMA_AA = (1 << 15), /* skip AA */
389 ATA_HORKAGE_DUMP_ID = (1 << 16), /* dump IDENTIFY data */
390
391 /* DMA mask for user DMA control: User visible values; DO NOT
392 renumber */
393 ATA_DMA_MASK_ATA = (1 << 0), /* DMA on ATA Disk */
394 ATA_DMA_MASK_ATAPI = (1 << 1), /* DMA on ATAPI */
395 ATA_DMA_MASK_CFA = (1 << 2), /* DMA on CF Card */
396
397 /* ATAPI command types */
398 ATAPI_READ = 0, /* READs */
399 ATAPI_WRITE = 1, /* WRITEs */
400 ATAPI_READ_CD = 2, /* READ CD [MSF] */
401 ATAPI_PASS_THRU = 3, /* SAT pass-thru */
402 ATAPI_MISC = 4, /* the rest */
403
404 /* Timing constants */
405 ATA_TIMING_SETUP = (1 << 0),
406 ATA_TIMING_ACT8B = (1 << 1),
407 ATA_TIMING_REC8B = (1 << 2),
408 ATA_TIMING_CYC8B = (1 << 3),
409 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
410 ATA_TIMING_CYC8B,
411 ATA_TIMING_ACTIVE = (1 << 4),
412 ATA_TIMING_RECOVER = (1 << 5),
413 ATA_TIMING_DMACK_HOLD = (1 << 6),
414 ATA_TIMING_CYCLE = (1 << 7),
415 ATA_TIMING_UDMA = (1 << 8),
416 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
417 ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
418 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
419 ATA_TIMING_DMACK_HOLD | ATA_TIMING_CYCLE |
420 ATA_TIMING_UDMA,
421
422 /* ACPI constants */
423 ATA_ACPI_FILTER_SETXFER = 1 << 0,
424 ATA_ACPI_FILTER_LOCK = 1 << 1,
425 ATA_ACPI_FILTER_DIPM = 1 << 2,
426 ATA_ACPI_FILTER_FPDMA_OFFSET = 1 << 3, /* FPDMA non-zero offset */
427 ATA_ACPI_FILTER_FPDMA_AA = 1 << 4, /* FPDMA auto activate */
428
429 ATA_ACPI_FILTER_DEFAULT = ATA_ACPI_FILTER_SETXFER |
430 ATA_ACPI_FILTER_LOCK |
431 ATA_ACPI_FILTER_DIPM,
432 };
433
434 enum ata_xfer_mask {
435 ATA_MASK_PIO = ((1LU << ATA_NR_PIO_MODES) - 1)
436 << ATA_SHIFT_PIO,
437 ATA_MASK_MWDMA = ((1LU << ATA_NR_MWDMA_MODES) - 1)
438 << ATA_SHIFT_MWDMA,
439 ATA_MASK_UDMA = ((1LU << ATA_NR_UDMA_MODES) - 1)
440 << ATA_SHIFT_UDMA,
441 };
442
443 enum hsm_task_states {
444 HSM_ST_IDLE, /* no command on going */
445 HSM_ST_FIRST, /* (waiting the device to)
446 write CDB or first data block */
447 HSM_ST, /* (waiting the device to) transfer data */
448 HSM_ST_LAST, /* (waiting the device to) complete command */
449 HSM_ST_ERR, /* error */
450 };
451
452 enum ata_completion_errors {
453 AC_ERR_DEV = (1 << 0), /* device reported error */
454 AC_ERR_HSM = (1 << 1), /* host state machine violation */
455 AC_ERR_TIMEOUT = (1 << 2), /* timeout */
456 AC_ERR_MEDIA = (1 << 3), /* media error */
457 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */
458 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */
459 AC_ERR_SYSTEM = (1 << 6), /* system error */
460 AC_ERR_INVALID = (1 << 7), /* invalid argument */
461 AC_ERR_OTHER = (1 << 8), /* unknown */
462 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */
463 AC_ERR_NCQ = (1 << 10), /* marker for offending NCQ qc */
464 };
465
466 /* forward declarations */
467 struct scsi_device;
468 struct ata_port_operations;
469 struct ata_port;
470 struct ata_link;
471 struct ata_queued_cmd;
472
473 /* typedefs */
474 typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
475 typedef int (*ata_prereset_fn_t)(struct ata_link *link, unsigned long deadline);
476 typedef int (*ata_reset_fn_t)(struct ata_link *link, unsigned int *classes,
477 unsigned long deadline);
478 typedef void (*ata_postreset_fn_t)(struct ata_link *link, unsigned int *classes);
479
480 /*
481 * host pm policy: If you alter this, you also need to alter libata-scsi.c
482 * (for the ascii descriptions)
483 */
484 enum link_pm {
485 NOT_AVAILABLE,
486 MIN_POWER,
487 MAX_PERFORMANCE,
488 MEDIUM_POWER,
489 };
490 extern struct device_attribute dev_attr_link_power_management_policy;
491 extern struct device_attribute dev_attr_unload_heads;
492 extern struct device_attribute dev_attr_em_message_type;
493 extern struct device_attribute dev_attr_em_message;
494 extern struct device_attribute dev_attr_sw_activity;
495
496 enum sw_activity {
497 OFF,
498 BLINK_ON,
499 BLINK_OFF,
500 };
501
502 #ifdef CONFIG_ATA_SFF
503 struct ata_ioports {
504 void __iomem *cmd_addr;
505 void __iomem *data_addr;
506 void __iomem *error_addr;
507 void __iomem *feature_addr;
508 void __iomem *nsect_addr;
509 void __iomem *lbal_addr;
510 void __iomem *lbam_addr;
511 void __iomem *lbah_addr;
512 void __iomem *device_addr;
513 void __iomem *status_addr;
514 void __iomem *command_addr;
515 void __iomem *altstatus_addr;
516 void __iomem *ctl_addr;
517 #ifdef CONFIG_ATA_BMDMA
518 void __iomem *bmdma_addr;
519 #endif /* CONFIG_ATA_BMDMA */
520 void __iomem *scr_addr;
521 };
522 #endif /* CONFIG_ATA_SFF */
523
524 struct ata_host {
525 spinlock_t lock;
526 struct device *dev;
527 void __iomem * const *iomap;
528 unsigned int n_ports;
529 void *private_data;
530 struct ata_port_operations *ops;
531 unsigned long flags;
532 #ifdef CONFIG_ATA_ACPI
533 acpi_handle acpi_handle;
534 #endif
535 struct ata_port *simplex_claimed; /* channel owning the DMA */
536 struct ata_port *ports[0];
537 };
538
539 struct ata_queued_cmd {
540 struct ata_port *ap;
541 struct ata_device *dev;
542
543 struct scsi_cmnd *scsicmd;
544 void (*scsidone)(struct scsi_cmnd *);
545
546 struct ata_taskfile tf;
547 u8 cdb[ATAPI_CDB_LEN];
548
549 unsigned long flags; /* ATA_QCFLAG_xxx */
550 unsigned int tag;
551 unsigned int n_elem;
552 unsigned int orig_n_elem;
553
554 int dma_dir;
555
556 unsigned int sect_size;
557
558 unsigned int nbytes;
559 unsigned int extrabytes;
560 unsigned int curbytes;
561
562 struct scatterlist *cursg;
563 unsigned int cursg_ofs;
564
565 struct scatterlist sgent;
566
567 struct scatterlist *sg;
568
569 unsigned int err_mask;
570 struct ata_taskfile result_tf;
571 ata_qc_cb_t complete_fn;
572
573 void *private_data;
574 void *lldd_task;
575 };
576
577 struct ata_port_stats {
578 unsigned long unhandled_irq;
579 unsigned long idle_irq;
580 unsigned long rw_reqbuf;
581 };
582
583 struct ata_ering_entry {
584 unsigned int eflags;
585 unsigned int err_mask;
586 u64 timestamp;
587 };
588
589 struct ata_ering {
590 int cursor;
591 struct ata_ering_entry ring[ATA_ERING_SIZE];
592 };
593
594 struct ata_device {
595 struct ata_link *link;
596 unsigned int devno; /* 0 or 1 */
597 unsigned int horkage; /* List of broken features */
598 unsigned long flags; /* ATA_DFLAG_xxx */
599 struct scsi_device *sdev; /* attached SCSI device */
600 void *private_data;
601 #ifdef CONFIG_ATA_ACPI
602 acpi_handle acpi_handle;
603 union acpi_object *gtf_cache;
604 unsigned int gtf_filter;
605 #endif
606 /* n_sector is CLEAR_BEGIN, read comment above CLEAR_BEGIN */
607 u64 n_sectors; /* size of device, if ATA */
608 u64 n_native_sectors; /* native size, if ATA */
609 unsigned int class; /* ATA_DEV_xxx */
610 unsigned long unpark_deadline;
611
612 u8 pio_mode;
613 u8 dma_mode;
614 u8 xfer_mode;
615 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
616
617 unsigned int multi_count; /* sectors count for
618 READ/WRITE MULTIPLE */
619 unsigned int max_sectors; /* per-device max sectors */
620 unsigned int cdb_len;
621
622 /* per-dev xfer mask */
623 unsigned long pio_mask;
624 unsigned long mwdma_mask;
625 unsigned long udma_mask;
626
627 /* for CHS addressing */
628 u16 cylinders; /* Number of cylinders */
629 u16 heads; /* Number of heads */
630 u16 sectors; /* Number of sectors per track */
631
632 union {
633 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
634 u32 gscr[SATA_PMP_GSCR_DWORDS]; /* PMP GSCR block */
635 };
636
637 /* error history */
638 int spdn_cnt;
639 /* ering is CLEAR_END, read comment above CLEAR_END */
640 struct ata_ering ering;
641 };
642
643 /* Fields between ATA_DEVICE_CLEAR_BEGIN and ATA_DEVICE_CLEAR_END are
644 * cleared to zero on ata_dev_init().
645 */
646 #define ATA_DEVICE_CLEAR_BEGIN offsetof(struct ata_device, n_sectors)
647 #define ATA_DEVICE_CLEAR_END offsetof(struct ata_device, ering)
648
649 struct ata_eh_info {
650 struct ata_device *dev; /* offending device */
651 u32 serror; /* SError from LLDD */
652 unsigned int err_mask; /* port-wide err_mask */
653 unsigned int action; /* ATA_EH_* action mask */
654 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */
655 unsigned int flags; /* ATA_EHI_* flags */
656
657 unsigned int probe_mask;
658
659 char desc[ATA_EH_DESC_LEN];
660 int desc_len;
661 };
662
663 struct ata_eh_context {
664 struct ata_eh_info i;
665 int tries[ATA_MAX_DEVICES];
666 int cmd_timeout_idx[ATA_MAX_DEVICES]
667 [ATA_EH_CMD_TIMEOUT_TABLE_SIZE];
668 unsigned int classes[ATA_MAX_DEVICES];
669 unsigned int did_probe_mask;
670 unsigned int unloaded_mask;
671 unsigned int saved_ncq_enabled;
672 u8 saved_xfer_mode[ATA_MAX_DEVICES];
673 /* timestamp for the last reset attempt or success */
674 unsigned long last_reset;
675 };
676
677 struct ata_acpi_drive
678 {
679 u32 pio;
680 u32 dma;
681 } __packed;
682
683 struct ata_acpi_gtm {
684 struct ata_acpi_drive drive[2];
685 u32 flags;
686 } __packed;
687
688 struct ata_link {
689 struct ata_port *ap;
690 int pmp; /* port multiplier port # */
691
692 unsigned int active_tag; /* active tag on this link */
693 u32 sactive; /* active NCQ commands */
694
695 unsigned int flags; /* ATA_LFLAG_xxx */
696
697 u32 saved_scontrol; /* SControl on probe */
698 unsigned int hw_sata_spd_limit;
699 unsigned int sata_spd_limit;
700 unsigned int sata_spd; /* current SATA PHY speed */
701
702 /* record runtime error info, protected by host_set lock */
703 struct ata_eh_info eh_info;
704 /* EH context */
705 struct ata_eh_context eh_context;
706
707 struct ata_device device[ATA_MAX_DEVICES];
708 };
709
710 struct ata_port {
711 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */
712 struct ata_port_operations *ops;
713 spinlock_t *lock;
714 /* Flags owned by the EH context. Only EH should touch these once the
715 port is active */
716 unsigned long flags; /* ATA_FLAG_xxx */
717 /* Flags that change dynamically, protected by ap->lock */
718 unsigned int pflags; /* ATA_PFLAG_xxx */
719 unsigned int print_id; /* user visible unique port ID */
720 unsigned int port_no; /* 0 based port no. inside the host */
721
722 #ifdef CONFIG_ATA_SFF
723 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
724 u8 ctl; /* cache of ATA control register */
725 u8 last_ctl; /* Cache last written value */
726 struct delayed_work sff_pio_task;
727 #ifdef CONFIG_ATA_BMDMA
728 struct ata_bmdma_prd *bmdma_prd; /* BMDMA SG list */
729 dma_addr_t bmdma_prd_dma; /* and its DMA mapping */
730 #endif /* CONFIG_ATA_BMDMA */
731 #endif /* CONFIG_ATA_SFF */
732
733 unsigned int pio_mask;
734 unsigned int mwdma_mask;
735 unsigned int udma_mask;
736 unsigned int cbl; /* cable type; ATA_CBL_xxx */
737
738 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
739 unsigned long qc_allocated;
740 unsigned int qc_active;
741 int nr_active_links; /* #links with active qcs */
742
743 struct ata_link link; /* host default link */
744 struct ata_link *slave_link; /* see ata_slave_link_init() */
745
746 int nr_pmp_links; /* nr of available PMP links */
747 struct ata_link *pmp_link; /* array of PMP links */
748 struct ata_link *excl_link; /* for PMP qc exclusion */
749
750 struct ata_port_stats stats;
751 struct ata_host *host;
752 struct device *dev;
753
754 struct delayed_work hotplug_task;
755 struct work_struct scsi_rescan_task;
756
757 unsigned int hsm_task_state;
758
759 u32 msg_enable;
760 struct list_head eh_done_q;
761 wait_queue_head_t eh_wait_q;
762 int eh_tries;
763 struct completion park_req_pending;
764
765 pm_message_t pm_mesg;
766 int *pm_result;
767 enum link_pm pm_policy;
768
769 struct timer_list fastdrain_timer;
770 unsigned long fastdrain_cnt;
771
772 int em_message_type;
773 void *private_data;
774
775 #ifdef CONFIG_ATA_ACPI
776 acpi_handle acpi_handle;
777 struct ata_acpi_gtm __acpi_init_gtm; /* use ata_acpi_init_gtm() */
778 #endif
779 /* owned by EH */
780 u8 sector_buf[ATA_SECT_SIZE] ____cacheline_aligned;
781 };
782
783 /* The following initializer overrides a method to NULL whether one of
784 * its parent has the method defined or not. This is equivalent to
785 * ERR_PTR(-ENOENT). Unfortunately, ERR_PTR doesn't render a constant
786 * expression and thus can't be used as an initializer.
787 */
788 #define ATA_OP_NULL (void *)(unsigned long)(-ENOENT)
789
790 struct ata_port_operations {
791 /*
792 * Command execution
793 */
794 int (*qc_defer)(struct ata_queued_cmd *qc);
795 int (*check_atapi_dma)(struct ata_queued_cmd *qc);
796 void (*qc_prep)(struct ata_queued_cmd *qc);
797 unsigned int (*qc_issue)(struct ata_queued_cmd *qc);
798 bool (*qc_fill_rtf)(struct ata_queued_cmd *qc);
799
800 /*
801 * Configuration and exception handling
802 */
803 int (*cable_detect)(struct ata_port *ap);
804 unsigned long (*mode_filter)(struct ata_device *dev, unsigned long xfer_mask);
805 void (*set_piomode)(struct ata_port *ap, struct ata_device *dev);
806 void (*set_dmamode)(struct ata_port *ap, struct ata_device *dev);
807 int (*set_mode)(struct ata_link *link, struct ata_device **r_failed_dev);
808 unsigned int (*read_id)(struct ata_device *dev, struct ata_taskfile *tf, u16 *id);
809
810 void (*dev_config)(struct ata_device *dev);
811
812 void (*freeze)(struct ata_port *ap);
813 void (*thaw)(struct ata_port *ap);
814 ata_prereset_fn_t prereset;
815 ata_reset_fn_t softreset;
816 ata_reset_fn_t hardreset;
817 ata_postreset_fn_t postreset;
818 ata_prereset_fn_t pmp_prereset;
819 ata_reset_fn_t pmp_softreset;
820 ata_reset_fn_t pmp_hardreset;
821 ata_postreset_fn_t pmp_postreset;
822 void (*error_handler)(struct ata_port *ap);
823 void (*lost_interrupt)(struct ata_port *ap);
824 void (*post_internal_cmd)(struct ata_queued_cmd *qc);
825
826 /*
827 * Optional features
828 */
829 int (*scr_read)(struct ata_link *link, unsigned int sc_reg, u32 *val);
830 int (*scr_write)(struct ata_link *link, unsigned int sc_reg, u32 val);
831 void (*pmp_attach)(struct ata_port *ap);
832 void (*pmp_detach)(struct ata_port *ap);
833 int (*enable_pm)(struct ata_port *ap, enum link_pm policy);
834 void (*disable_pm)(struct ata_port *ap);
835
836 /*
837 * Start, stop, suspend and resume
838 */
839 int (*port_suspend)(struct ata_port *ap, pm_message_t mesg);
840 int (*port_resume)(struct ata_port *ap);
841 int (*port_start)(struct ata_port *ap);
842 void (*port_stop)(struct ata_port *ap);
843 void (*host_stop)(struct ata_host *host);
844
845 #ifdef CONFIG_ATA_SFF
846 /*
847 * SFF / taskfile oriented ops
848 */
849 void (*sff_dev_select)(struct ata_port *ap, unsigned int device);
850 void (*sff_set_devctl)(struct ata_port *ap, u8 ctl);
851 u8 (*sff_check_status)(struct ata_port *ap);
852 u8 (*sff_check_altstatus)(struct ata_port *ap);
853 void (*sff_tf_load)(struct ata_port *ap, const struct ata_taskfile *tf);
854 void (*sff_tf_read)(struct ata_port *ap, struct ata_taskfile *tf);
855 void (*sff_exec_command)(struct ata_port *ap,
856 const struct ata_taskfile *tf);
857 unsigned int (*sff_data_xfer)(struct ata_device *dev,
858 unsigned char *buf, unsigned int buflen, int rw);
859 void (*sff_irq_on)(struct ata_port *);
860 bool (*sff_irq_check)(struct ata_port *);
861 void (*sff_irq_clear)(struct ata_port *);
862 void (*sff_drain_fifo)(struct ata_queued_cmd *qc);
863
864 #ifdef CONFIG_ATA_BMDMA
865 void (*bmdma_setup)(struct ata_queued_cmd *qc);
866 void (*bmdma_start)(struct ata_queued_cmd *qc);
867 void (*bmdma_stop)(struct ata_queued_cmd *qc);
868 u8 (*bmdma_status)(struct ata_port *ap);
869 #endif /* CONFIG_ATA_BMDMA */
870 #endif /* CONFIG_ATA_SFF */
871
872 ssize_t (*em_show)(struct ata_port *ap, char *buf);
873 ssize_t (*em_store)(struct ata_port *ap, const char *message,
874 size_t size);
875 ssize_t (*sw_activity_show)(struct ata_device *dev, char *buf);
876 ssize_t (*sw_activity_store)(struct ata_device *dev,
877 enum sw_activity val);
878 /*
879 * Obsolete
880 */
881 void (*phy_reset)(struct ata_port *ap);
882 void (*eng_timeout)(struct ata_port *ap);
883
884 /*
885 * ->inherits must be the last field and all the preceding
886 * fields must be pointers.
887 */
888 const struct ata_port_operations *inherits;
889 };
890
891 struct ata_port_info {
892 unsigned long flags;
893 unsigned long link_flags;
894 unsigned long pio_mask;
895 unsigned long mwdma_mask;
896 unsigned long udma_mask;
897 struct ata_port_operations *port_ops;
898 void *private_data;
899 };
900
901 struct ata_timing {
902 unsigned short mode; /* ATA mode */
903 unsigned short setup; /* t1 */
904 unsigned short act8b; /* t2 for 8-bit I/O */
905 unsigned short rec8b; /* t2i for 8-bit I/O */
906 unsigned short cyc8b; /* t0 for 8-bit I/O */
907 unsigned short active; /* t2 or tD */
908 unsigned short recover; /* t2i or tK */
909 unsigned short dmack_hold; /* tj */
910 unsigned short cycle; /* t0 */
911 unsigned short udma; /* t2CYCTYP/2 */
912 };
913
914 /*
915 * Core layer - drivers/ata/libata-core.c
916 */
917 extern const unsigned long sata_deb_timing_normal[];
918 extern const unsigned long sata_deb_timing_hotplug[];
919 extern const unsigned long sata_deb_timing_long[];
920
921 extern struct ata_port_operations ata_dummy_port_ops;
922 extern const struct ata_port_info ata_dummy_port_info;
923
924 static inline const unsigned long *
925 sata_ehc_deb_timing(struct ata_eh_context *ehc)
926 {
927 if (ehc->i.flags & ATA_EHI_HOTPLUGGED)
928 return sata_deb_timing_hotplug;
929 else
930 return sata_deb_timing_normal;
931 }
932
933 static inline int ata_port_is_dummy(struct ata_port *ap)
934 {
935 return ap->ops == &ata_dummy_port_ops;
936 }
937
938 extern int sata_set_spd(struct ata_link *link);
939 extern int ata_std_prereset(struct ata_link *link, unsigned long deadline);
940 extern int ata_wait_after_reset(struct ata_link *link, unsigned long deadline,
941 int (*check_ready)(struct ata_link *link));
942 extern int sata_link_debounce(struct ata_link *link,
943 const unsigned long *params, unsigned long deadline);
944 extern int sata_link_resume(struct ata_link *link, const unsigned long *params,
945 unsigned long deadline);
946 extern int sata_link_hardreset(struct ata_link *link,
947 const unsigned long *timing, unsigned long deadline,
948 bool *online, int (*check_ready)(struct ata_link *));
949 extern int sata_std_hardreset(struct ata_link *link, unsigned int *class,
950 unsigned long deadline);
951 extern void ata_std_postreset(struct ata_link *link, unsigned int *classes);
952
953 extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports);
954 extern struct ata_host *ata_host_alloc_pinfo(struct device *dev,
955 const struct ata_port_info * const * ppi, int n_ports);
956 extern int ata_slave_link_init(struct ata_port *ap);
957 extern int ata_host_start(struct ata_host *host);
958 extern int ata_host_register(struct ata_host *host,
959 struct scsi_host_template *sht);
960 extern int ata_host_activate(struct ata_host *host, int irq,
961 irq_handler_t irq_handler, unsigned long irq_flags,
962 struct scsi_host_template *sht);
963 extern void ata_host_detach(struct ata_host *host);
964 extern void ata_host_init(struct ata_host *, struct device *,
965 unsigned long, struct ata_port_operations *);
966 extern int ata_scsi_detect(struct scsi_host_template *sht);
967 extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
968 extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *));
969 extern int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *dev,
970 int cmd, void __user *arg);
971 extern void ata_sas_port_destroy(struct ata_port *);
972 extern struct ata_port *ata_sas_port_alloc(struct ata_host *,
973 struct ata_port_info *, struct Scsi_Host *);
974 extern int ata_sas_port_init(struct ata_port *);
975 extern int ata_sas_port_start(struct ata_port *ap);
976 extern void ata_sas_port_stop(struct ata_port *ap);
977 extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *);
978 extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
979 struct ata_port *ap);
980 extern int sata_scr_valid(struct ata_link *link);
981 extern int sata_scr_read(struct ata_link *link, int reg, u32 *val);
982 extern int sata_scr_write(struct ata_link *link, int reg, u32 val);
983 extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val);
984 extern bool ata_link_online(struct ata_link *link);
985 extern bool ata_link_offline(struct ata_link *link);
986 #ifdef CONFIG_PM
987 extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg);
988 extern void ata_host_resume(struct ata_host *host);
989 #endif
990 extern int ata_ratelimit(void);
991 extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
992 unsigned long interval, unsigned long timeout);
993 extern int atapi_cmd_type(u8 opcode);
994 extern void ata_tf_to_fis(const struct ata_taskfile *tf,
995 u8 pmp, int is_cmd, u8 *fis);
996 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
997 extern unsigned long ata_pack_xfermask(unsigned long pio_mask,
998 unsigned long mwdma_mask, unsigned long udma_mask);
999 extern void ata_unpack_xfermask(unsigned long xfer_mask,
1000 unsigned long *pio_mask, unsigned long *mwdma_mask,
1001 unsigned long *udma_mask);
1002 extern u8 ata_xfer_mask2mode(unsigned long xfer_mask);
1003 extern unsigned long ata_xfer_mode2mask(u8 xfer_mode);
1004 extern int ata_xfer_mode2shift(unsigned long xfer_mode);
1005 extern const char *ata_mode_string(unsigned long xfer_mask);
1006 extern unsigned long ata_id_xfermask(const u16 *id);
1007 extern int ata_std_qc_defer(struct ata_queued_cmd *qc);
1008 extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
1009 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
1010 unsigned int n_elem);
1011 extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
1012 extern void ata_dev_disable(struct ata_device *adev);
1013 extern void ata_id_string(const u16 *id, unsigned char *s,
1014 unsigned int ofs, unsigned int len);
1015 extern void ata_id_c_string(const u16 *id, unsigned char *s,
1016 unsigned int ofs, unsigned int len);
1017 extern unsigned int ata_do_dev_read_id(struct ata_device *dev,
1018 struct ata_taskfile *tf, u16 *id);
1019 extern void ata_qc_complete(struct ata_queued_cmd *qc);
1020 extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active);
1021 extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
1022 void (*done)(struct scsi_cmnd *));
1023 extern int ata_std_bios_param(struct scsi_device *sdev,
1024 struct block_device *bdev,
1025 sector_t capacity, int geom[]);
1026 extern void ata_scsi_unlock_native_capacity(struct scsi_device *sdev);
1027 extern int ata_scsi_slave_config(struct scsi_device *sdev);
1028 extern void ata_scsi_slave_destroy(struct scsi_device *sdev);
1029 extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
1030 int queue_depth, int reason);
1031 extern struct ata_device *ata_dev_pair(struct ata_device *adev);
1032 extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev);
1033
1034 extern int ata_cable_40wire(struct ata_port *ap);
1035 extern int ata_cable_80wire(struct ata_port *ap);
1036 extern int ata_cable_sata(struct ata_port *ap);
1037 extern int ata_cable_ignore(struct ata_port *ap);
1038 extern int ata_cable_unknown(struct ata_port *ap);
1039
1040 /* Timing helpers */
1041 extern unsigned int ata_pio_need_iordy(const struct ata_device *);
1042 extern const struct ata_timing *ata_timing_find_mode(u8 xfer_mode);
1043 extern int ata_timing_compute(struct ata_device *, unsigned short,
1044 struct ata_timing *, int, int);
1045 extern void ata_timing_merge(const struct ata_timing *,
1046 const struct ata_timing *, struct ata_timing *,
1047 unsigned int);
1048 extern u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle);
1049
1050 /* PCI */
1051 #ifdef CONFIG_PCI
1052 struct pci_dev;
1053
1054 struct pci_bits {
1055 unsigned int reg; /* PCI config register to read */
1056 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
1057 unsigned long mask;
1058 unsigned long val;
1059 };
1060
1061 extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
1062 extern void ata_pci_remove_one(struct pci_dev *pdev);
1063
1064 #ifdef CONFIG_PM
1065 extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg);
1066 extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev);
1067 extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
1068 extern int ata_pci_device_resume(struct pci_dev *pdev);
1069 #endif /* CONFIG_PM */
1070 #endif /* CONFIG_PCI */
1071
1072 /*
1073 * ACPI - drivers/ata/libata-acpi.c
1074 */
1075 #ifdef CONFIG_ATA_ACPI
1076 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
1077 {
1078 if (ap->pflags & ATA_PFLAG_INIT_GTM_VALID)
1079 return &ap->__acpi_init_gtm;
1080 return NULL;
1081 }
1082 int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm);
1083 int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *stm);
1084 unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev,
1085 const struct ata_acpi_gtm *gtm);
1086 int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm);
1087 #else
1088 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
1089 {
1090 return NULL;
1091 }
1092
1093 static inline int ata_acpi_stm(const struct ata_port *ap,
1094 struct ata_acpi_gtm *stm)
1095 {
1096 return -ENOSYS;
1097 }
1098
1099 static inline int ata_acpi_gtm(const struct ata_port *ap,
1100 struct ata_acpi_gtm *stm)
1101 {
1102 return -ENOSYS;
1103 }
1104
1105 static inline unsigned int ata_acpi_gtm_xfermask(struct ata_device *dev,
1106 const struct ata_acpi_gtm *gtm)
1107 {
1108 return 0;
1109 }
1110
1111 static inline int ata_acpi_cbl_80wire(struct ata_port *ap,
1112 const struct ata_acpi_gtm *gtm)
1113 {
1114 return 0;
1115 }
1116 #endif
1117
1118 /*
1119 * EH - drivers/ata/libata-eh.c
1120 */
1121 extern void ata_port_schedule_eh(struct ata_port *ap);
1122 extern int ata_link_abort(struct ata_link *link);
1123 extern int ata_port_abort(struct ata_port *ap);
1124 extern int ata_port_freeze(struct ata_port *ap);
1125 extern int sata_async_notification(struct ata_port *ap);
1126
1127 extern void ata_eh_freeze_port(struct ata_port *ap);
1128 extern void ata_eh_thaw_port(struct ata_port *ap);
1129
1130 extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
1131 extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
1132 extern void ata_eh_analyze_ncq_error(struct ata_link *link);
1133
1134 extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
1135 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
1136 ata_postreset_fn_t postreset);
1137 extern void ata_std_error_handler(struct ata_port *ap);
1138
1139 /*
1140 * Base operations to inherit from and initializers for sht
1141 *
1142 * Operations
1143 *
1144 * base : Common to all libata drivers.
1145 * sata : SATA controllers w/ native interface.
1146 * pmp : SATA controllers w/ PMP support.
1147 * sff : SFF ATA controllers w/o BMDMA support.
1148 * bmdma : SFF ATA controllers w/ BMDMA support.
1149 *
1150 * sht initializers
1151 *
1152 * BASE : Common to all libata drivers. The user must set
1153 * sg_tablesize and dma_boundary.
1154 * PIO : SFF ATA controllers w/ only PIO support.
1155 * BMDMA : SFF ATA controllers w/ BMDMA support. sg_tablesize and
1156 * dma_boundary are set to BMDMA limits.
1157 * NCQ : SATA controllers supporting NCQ. The user must set
1158 * sg_tablesize, dma_boundary and can_queue.
1159 */
1160 extern const struct ata_port_operations ata_base_port_ops;
1161 extern const struct ata_port_operations sata_port_ops;
1162 extern struct device_attribute *ata_common_sdev_attrs[];
1163
1164 #define ATA_BASE_SHT(drv_name) \
1165 .module = THIS_MODULE, \
1166 .name = drv_name, \
1167 .ioctl = ata_scsi_ioctl, \
1168 .queuecommand = ata_scsi_queuecmd, \
1169 .can_queue = ATA_DEF_QUEUE, \
1170 .this_id = ATA_SHT_THIS_ID, \
1171 .cmd_per_lun = ATA_SHT_CMD_PER_LUN, \
1172 .emulated = ATA_SHT_EMULATED, \
1173 .use_clustering = ATA_SHT_USE_CLUSTERING, \
1174 .proc_name = drv_name, \
1175 .slave_configure = ata_scsi_slave_config, \
1176 .slave_destroy = ata_scsi_slave_destroy, \
1177 .bios_param = ata_std_bios_param, \
1178 .unlock_native_capacity = ata_scsi_unlock_native_capacity, \
1179 .sdev_attrs = ata_common_sdev_attrs
1180
1181 #define ATA_NCQ_SHT(drv_name) \
1182 ATA_BASE_SHT(drv_name), \
1183 .change_queue_depth = ata_scsi_change_queue_depth
1184
1185 /*
1186 * PMP helpers
1187 */
1188 #ifdef CONFIG_SATA_PMP
1189 static inline bool sata_pmp_supported(struct ata_port *ap)
1190 {
1191 return ap->flags & ATA_FLAG_PMP;
1192 }
1193
1194 static inline bool sata_pmp_attached(struct ata_port *ap)
1195 {
1196 return ap->nr_pmp_links != 0;
1197 }
1198
1199 static inline int ata_is_host_link(const struct ata_link *link)
1200 {
1201 return link == &link->ap->link || link == link->ap->slave_link;
1202 }
1203 #else /* CONFIG_SATA_PMP */
1204 static inline bool sata_pmp_supported(struct ata_port *ap)
1205 {
1206 return false;
1207 }
1208
1209 static inline bool sata_pmp_attached(struct ata_port *ap)
1210 {
1211 return false;
1212 }
1213
1214 static inline int ata_is_host_link(const struct ata_link *link)
1215 {
1216 return 1;
1217 }
1218 #endif /* CONFIG_SATA_PMP */
1219
1220 static inline int sata_srst_pmp(struct ata_link *link)
1221 {
1222 if (sata_pmp_supported(link->ap) && ata_is_host_link(link))
1223 return SATA_PMP_CTRL_PORT;
1224 return link->pmp;
1225 }
1226
1227 /*
1228 * printk helpers
1229 */
1230 #define ata_port_printk(ap, lv, fmt, args...) \
1231 printk("%sata%u: "fmt, lv, (ap)->print_id , ##args)
1232
1233 #define ata_link_printk(link, lv, fmt, args...) do { \
1234 if (sata_pmp_attached((link)->ap) || (link)->ap->slave_link) \
1235 printk("%sata%u.%02u: "fmt, lv, (link)->ap->print_id, \
1236 (link)->pmp , ##args); \
1237 else \
1238 printk("%sata%u: "fmt, lv, (link)->ap->print_id , ##args); \
1239 } while(0)
1240
1241 #define ata_dev_printk(dev, lv, fmt, args...) \
1242 printk("%sata%u.%02u: "fmt, lv, (dev)->link->ap->print_id, \
1243 (dev)->link->pmp + (dev)->devno , ##args)
1244
1245 /*
1246 * ata_eh_info helpers
1247 */
1248 extern void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...)
1249 __attribute__ ((format (printf, 2, 3)));
1250 extern void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...)
1251 __attribute__ ((format (printf, 2, 3)));
1252 extern void ata_ehi_clear_desc(struct ata_eh_info *ehi);
1253
1254 static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
1255 {
1256 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
1257 ehi->flags |= ATA_EHI_HOTPLUGGED;
1258 ehi->action |= ATA_EH_RESET | ATA_EH_ENABLE_LINK;
1259 ehi->err_mask |= AC_ERR_ATA_BUS;
1260 }
1261
1262 /*
1263 * port description helpers
1264 */
1265 extern void ata_port_desc(struct ata_port *ap, const char *fmt, ...)
1266 __attribute__ ((format (printf, 2, 3)));
1267 #ifdef CONFIG_PCI
1268 extern void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset,
1269 const char *name);
1270 #endif
1271
1272 static inline unsigned int ata_tag_valid(unsigned int tag)
1273 {
1274 return (tag < ATA_MAX_QUEUE) ? 1 : 0;
1275 }
1276
1277 static inline unsigned int ata_tag_internal(unsigned int tag)
1278 {
1279 return tag == ATA_TAG_INTERNAL;
1280 }
1281
1282 /*
1283 * device helpers
1284 */
1285 static inline unsigned int ata_class_enabled(unsigned int class)
1286 {
1287 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI ||
1288 class == ATA_DEV_PMP || class == ATA_DEV_SEMB;
1289 }
1290
1291 static inline unsigned int ata_class_disabled(unsigned int class)
1292 {
1293 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP ||
1294 class == ATA_DEV_PMP_UNSUP || class == ATA_DEV_SEMB_UNSUP;
1295 }
1296
1297 static inline unsigned int ata_class_absent(unsigned int class)
1298 {
1299 return !ata_class_enabled(class) && !ata_class_disabled(class);
1300 }
1301
1302 static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
1303 {
1304 return ata_class_enabled(dev->class);
1305 }
1306
1307 static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
1308 {
1309 return ata_class_disabled(dev->class);
1310 }
1311
1312 static inline unsigned int ata_dev_absent(const struct ata_device *dev)
1313 {
1314 return ata_class_absent(dev->class);
1315 }
1316
1317 /*
1318 * link helpers
1319 */
1320 static inline int ata_link_max_devices(const struct ata_link *link)
1321 {
1322 if (ata_is_host_link(link) && link->ap->flags & ATA_FLAG_SLAVE_POSS)
1323 return 2;
1324 return 1;
1325 }
1326
1327 static inline int ata_link_active(struct ata_link *link)
1328 {
1329 return ata_tag_valid(link->active_tag) || link->sactive;
1330 }
1331
1332 /*
1333 * Iterators
1334 *
1335 * ATA_LITER_* constants are used to select link iteration mode and
1336 * ATA_DITER_* device iteration mode.
1337 *
1338 * For a custom iteration directly using ata_{link|dev}_next(), if
1339 * @link or @dev, respectively, is NULL, the first element is
1340 * returned. @dev and @link can be any valid device or link and the
1341 * next element according to the iteration mode will be returned.
1342 * After the last element, NULL is returned.
1343 */
1344 enum ata_link_iter_mode {
1345 ATA_LITER_EDGE, /* if present, PMP links only; otherwise,
1346 * host link. no slave link */
1347 ATA_LITER_HOST_FIRST, /* host link followed by PMP or slave links */
1348 ATA_LITER_PMP_FIRST, /* PMP links followed by host link,
1349 * slave link still comes after host link */
1350 };
1351
1352 enum ata_dev_iter_mode {
1353 ATA_DITER_ENABLED,
1354 ATA_DITER_ENABLED_REVERSE,
1355 ATA_DITER_ALL,
1356 ATA_DITER_ALL_REVERSE,
1357 };
1358
1359 extern struct ata_link *ata_link_next(struct ata_link *link,
1360 struct ata_port *ap,
1361 enum ata_link_iter_mode mode);
1362
1363 extern struct ata_device *ata_dev_next(struct ata_device *dev,
1364 struct ata_link *link,
1365 enum ata_dev_iter_mode mode);
1366
1367 /*
1368 * Shortcut notation for iterations
1369 *
1370 * ata_for_each_link() iterates over each link of @ap according to
1371 * @mode. @link points to the current link in the loop. @link is
1372 * NULL after loop termination. ata_for_each_dev() works the same way
1373 * except that it iterates over each device of @link.
1374 *
1375 * Note that the mode prefixes ATA_{L|D}ITER_ shouldn't need to be
1376 * specified when using the following shorthand notations. Only the
1377 * mode itself (EDGE, HOST_FIRST, ENABLED, etc...) should be
1378 * specified. This not only increases brevity but also makes it
1379 * impossible to use ATA_LITER_* for device iteration or vice-versa.
1380 */
1381 #define ata_for_each_link(link, ap, mode) \
1382 for ((link) = ata_link_next(NULL, (ap), ATA_LITER_##mode); (link); \
1383 (link) = ata_link_next((link), (ap), ATA_LITER_##mode))
1384
1385 #define ata_for_each_dev(dev, link, mode) \
1386 for ((dev) = ata_dev_next(NULL, (link), ATA_DITER_##mode); (dev); \
1387 (dev) = ata_dev_next((dev), (link), ATA_DITER_##mode))
1388
1389 /**
1390 * ata_ncq_enabled - Test whether NCQ is enabled
1391 * @dev: ATA device to test for
1392 *
1393 * LOCKING:
1394 * spin_lock_irqsave(host lock)
1395 *
1396 * RETURNS:
1397 * 1 if NCQ is enabled for @dev, 0 otherwise.
1398 */
1399 static inline int ata_ncq_enabled(struct ata_device *dev)
1400 {
1401 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF |
1402 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ;
1403 }
1404
1405 static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
1406 {
1407 qc->tf.ctl |= ATA_NIEN;
1408 }
1409
1410 static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap,
1411 unsigned int tag)
1412 {
1413 if (likely(ata_tag_valid(tag)))
1414 return &ap->qcmd[tag];
1415 return NULL;
1416 }
1417
1418 static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap,
1419 unsigned int tag)
1420 {
1421 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
1422
1423 if (unlikely(!qc) || !ap->ops->error_handler)
1424 return qc;
1425
1426 if ((qc->flags & (ATA_QCFLAG_ACTIVE |
1427 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE)
1428 return qc;
1429
1430 return NULL;
1431 }
1432
1433 static inline unsigned int ata_qc_raw_nbytes(struct ata_queued_cmd *qc)
1434 {
1435 return qc->nbytes - min(qc->extrabytes, qc->nbytes);
1436 }
1437
1438 static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
1439 {
1440 memset(tf, 0, sizeof(*tf));
1441
1442 #ifdef CONFIG_ATA_SFF
1443 tf->ctl = dev->link->ap->ctl;
1444 #else
1445 tf->ctl = ATA_DEVCTL_OBS;
1446 #endif
1447 if (dev->devno == 0)
1448 tf->device = ATA_DEVICE_OBS;
1449 else
1450 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
1451 }
1452
1453 static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
1454 {
1455 qc->dma_dir = DMA_NONE;
1456 qc->sg = NULL;
1457 qc->flags = 0;
1458 qc->cursg = NULL;
1459 qc->cursg_ofs = 0;
1460 qc->nbytes = qc->extrabytes = qc->curbytes = 0;
1461 qc->n_elem = 0;
1462 qc->err_mask = 0;
1463 qc->sect_size = ATA_SECT_SIZE;
1464
1465 ata_tf_init(qc->dev, &qc->tf);
1466
1467 /* init result_tf such that it indicates normal completion */
1468 qc->result_tf.command = ATA_DRDY;
1469 qc->result_tf.feature = 0;
1470 }
1471
1472 static inline int ata_try_flush_cache(const struct ata_device *dev)
1473 {
1474 return ata_id_wcache_enabled(dev->id) ||
1475 ata_id_has_flush(dev->id) ||
1476 ata_id_has_flush_ext(dev->id);
1477 }
1478
1479 static inline unsigned int ac_err_mask(u8 status)
1480 {
1481 if (status & (ATA_BUSY | ATA_DRQ))
1482 return AC_ERR_HSM;
1483 if (status & (ATA_ERR | ATA_DF))
1484 return AC_ERR_DEV;
1485 return 0;
1486 }
1487
1488 static inline unsigned int __ac_err_mask(u8 status)
1489 {
1490 unsigned int mask = ac_err_mask(status);
1491 if (mask == 0)
1492 return AC_ERR_OTHER;
1493 return mask;
1494 }
1495
1496 static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
1497 {
1498 return *(struct ata_port **)&host->hostdata[0];
1499 }
1500
1501 static inline int ata_check_ready(u8 status)
1502 {
1503 if (!(status & ATA_BUSY))
1504 return 1;
1505
1506 /* 0xff indicates either no device or device not ready */
1507 if (status == 0xff)
1508 return -ENODEV;
1509
1510 return 0;
1511 }
1512
1513 static inline unsigned long ata_deadline(unsigned long from_jiffies,
1514 unsigned long timeout_msecs)
1515 {
1516 return from_jiffies + msecs_to_jiffies(timeout_msecs);
1517 }
1518
1519 /* Don't open code these in drivers as there are traps. Firstly the range may
1520 change in future hardware and specs, secondly 0xFF means 'no DMA' but is
1521 > UDMA_0. Dyma ddreigiau */
1522
1523 static inline int ata_using_mwdma(struct ata_device *adev)
1524 {
1525 if (adev->dma_mode >= XFER_MW_DMA_0 && adev->dma_mode <= XFER_MW_DMA_4)
1526 return 1;
1527 return 0;
1528 }
1529
1530 static inline int ata_using_udma(struct ata_device *adev)
1531 {
1532 if (adev->dma_mode >= XFER_UDMA_0 && adev->dma_mode <= XFER_UDMA_7)
1533 return 1;
1534 return 0;
1535 }
1536
1537 static inline int ata_dma_enabled(struct ata_device *adev)
1538 {
1539 return (adev->dma_mode == 0xFF ? 0 : 1);
1540 }
1541
1542 /**************************************************************************
1543 * PMP - drivers/ata/libata-pmp.c
1544 */
1545 #ifdef CONFIG_SATA_PMP
1546
1547 extern const struct ata_port_operations sata_pmp_port_ops;
1548
1549 extern int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc);
1550 extern void sata_pmp_error_handler(struct ata_port *ap);
1551
1552 #else /* CONFIG_SATA_PMP */
1553
1554 #define sata_pmp_port_ops sata_port_ops
1555 #define sata_pmp_qc_defer_cmd_switch ata_std_qc_defer
1556 #define sata_pmp_error_handler ata_std_error_handler
1557
1558 #endif /* CONFIG_SATA_PMP */
1559
1560
1561 /**************************************************************************
1562 * SFF - drivers/ata/libata-sff.c
1563 */
1564 #ifdef CONFIG_ATA_SFF
1565
1566 extern const struct ata_port_operations ata_sff_port_ops;
1567 extern const struct ata_port_operations ata_bmdma32_port_ops;
1568
1569 /* PIO only, sg_tablesize and dma_boundary limits can be removed */
1570 #define ATA_PIO_SHT(drv_name) \
1571 ATA_BASE_SHT(drv_name), \
1572 .sg_tablesize = LIBATA_MAX_PRD, \
1573 .dma_boundary = ATA_DMA_BOUNDARY
1574
1575 extern void ata_sff_dev_select(struct ata_port *ap, unsigned int device);
1576 extern u8 ata_sff_check_status(struct ata_port *ap);
1577 extern void ata_sff_pause(struct ata_port *ap);
1578 extern void ata_sff_dma_pause(struct ata_port *ap);
1579 extern int ata_sff_busy_sleep(struct ata_port *ap,
1580 unsigned long timeout_pat, unsigned long timeout);
1581 extern int ata_sff_wait_ready(struct ata_link *link, unsigned long deadline);
1582 extern void ata_sff_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
1583 extern void ata_sff_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
1584 extern void ata_sff_exec_command(struct ata_port *ap,
1585 const struct ata_taskfile *tf);
1586 extern unsigned int ata_sff_data_xfer(struct ata_device *dev,
1587 unsigned char *buf, unsigned int buflen, int rw);
1588 extern unsigned int ata_sff_data_xfer32(struct ata_device *dev,
1589 unsigned char *buf, unsigned int buflen, int rw);
1590 extern unsigned int ata_sff_data_xfer_noirq(struct ata_device *dev,
1591 unsigned char *buf, unsigned int buflen, int rw);
1592 extern void ata_sff_irq_on(struct ata_port *ap);
1593 extern void ata_sff_irq_clear(struct ata_port *ap);
1594 extern int ata_sff_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
1595 u8 status, int in_wq);
1596 extern void ata_sff_queue_pio_task(struct ata_port *ap, unsigned long delay);
1597 extern unsigned int ata_sff_qc_issue(struct ata_queued_cmd *qc);
1598 extern bool ata_sff_qc_fill_rtf(struct ata_queued_cmd *qc);
1599 extern unsigned int ata_sff_port_intr(struct ata_port *ap,
1600 struct ata_queued_cmd *qc);
1601 extern irqreturn_t ata_sff_interrupt(int irq, void *dev_instance);
1602 extern void ata_sff_lost_interrupt(struct ata_port *ap);
1603 extern void ata_sff_freeze(struct ata_port *ap);
1604 extern void ata_sff_thaw(struct ata_port *ap);
1605 extern int ata_sff_prereset(struct ata_link *link, unsigned long deadline);
1606 extern unsigned int ata_sff_dev_classify(struct ata_device *dev, int present,
1607 u8 *r_err);
1608 extern int ata_sff_wait_after_reset(struct ata_link *link, unsigned int devmask,
1609 unsigned long deadline);
1610 extern int ata_sff_softreset(struct ata_link *link, unsigned int *classes,
1611 unsigned long deadline);
1612 extern int sata_sff_hardreset(struct ata_link *link, unsigned int *class,
1613 unsigned long deadline);
1614 extern void ata_sff_postreset(struct ata_link *link, unsigned int *classes);
1615 extern void ata_sff_drain_fifo(struct ata_queued_cmd *qc);
1616 extern void ata_sff_error_handler(struct ata_port *ap);
1617 extern void ata_sff_std_ports(struct ata_ioports *ioaddr);
1618 #ifdef CONFIG_PCI
1619 extern int ata_pci_sff_init_host(struct ata_host *host);
1620 extern int ata_pci_sff_prepare_host(struct pci_dev *pdev,
1621 const struct ata_port_info * const * ppi,
1622 struct ata_host **r_host);
1623 extern int ata_pci_sff_activate_host(struct ata_host *host,
1624 irq_handler_t irq_handler,
1625 struct scsi_host_template *sht);
1626 extern int ata_pci_sff_init_one(struct pci_dev *pdev,
1627 const struct ata_port_info * const * ppi,
1628 struct scsi_host_template *sht, void *host_priv, int hflags);
1629 #endif /* CONFIG_PCI */
1630
1631 #ifdef CONFIG_ATA_BMDMA
1632
1633 extern const struct ata_port_operations ata_bmdma_port_ops;
1634
1635 #define ATA_BMDMA_SHT(drv_name) \
1636 ATA_BASE_SHT(drv_name), \
1637 .sg_tablesize = LIBATA_MAX_PRD, \
1638 .dma_boundary = ATA_DMA_BOUNDARY
1639
1640 extern void ata_bmdma_qc_prep(struct ata_queued_cmd *qc);
1641 extern unsigned int ata_bmdma_qc_issue(struct ata_queued_cmd *qc);
1642 extern void ata_bmdma_dumb_qc_prep(struct ata_queued_cmd *qc);
1643 extern unsigned int ata_bmdma_port_intr(struct ata_port *ap,
1644 struct ata_queued_cmd *qc);
1645 extern irqreturn_t ata_bmdma_interrupt(int irq, void *dev_instance);
1646 extern void ata_bmdma_error_handler(struct ata_port *ap);
1647 extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc);
1648 extern void ata_bmdma_irq_clear(struct ata_port *ap);
1649 extern void ata_bmdma_setup(struct ata_queued_cmd *qc);
1650 extern void ata_bmdma_start(struct ata_queued_cmd *qc);
1651 extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
1652 extern u8 ata_bmdma_status(struct ata_port *ap);
1653 extern int ata_bmdma_port_start(struct ata_port *ap);
1654 extern int ata_bmdma_port_start32(struct ata_port *ap);
1655
1656 #ifdef CONFIG_PCI
1657 extern int ata_pci_bmdma_clear_simplex(struct pci_dev *pdev);
1658 extern void ata_pci_bmdma_init(struct ata_host *host);
1659 extern int ata_pci_bmdma_prepare_host(struct pci_dev *pdev,
1660 const struct ata_port_info * const * ppi,
1661 struct ata_host **r_host);
1662 extern int ata_pci_bmdma_init_one(struct pci_dev *pdev,
1663 const struct ata_port_info * const * ppi,
1664 struct scsi_host_template *sht,
1665 void *host_priv, int hflags);
1666 #endif /* CONFIG_PCI */
1667 #endif /* CONFIG_ATA_BMDMA */
1668
1669 /**
1670 * ata_sff_busy_wait - Wait for a port status register
1671 * @ap: Port to wait for.
1672 * @bits: bits that must be clear
1673 * @max: number of 10uS waits to perform
1674 *
1675 * Waits up to max*10 microseconds for the selected bits in the port's
1676 * status register to be cleared.
1677 * Returns final value of status register.
1678 *
1679 * LOCKING:
1680 * Inherited from caller.
1681 */
1682 static inline u8 ata_sff_busy_wait(struct ata_port *ap, unsigned int bits,
1683 unsigned int max)
1684 {
1685 u8 status;
1686
1687 do {
1688 udelay(10);
1689 status = ap->ops->sff_check_status(ap);
1690 max--;
1691 } while (status != 0xff && (status & bits) && (max > 0));
1692
1693 return status;
1694 }
1695
1696 /**
1697 * ata_wait_idle - Wait for a port to be idle.
1698 * @ap: Port to wait for.
1699 *
1700 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
1701 * Returns final value of status register.
1702 *
1703 * LOCKING:
1704 * Inherited from caller.
1705 */
1706 static inline u8 ata_wait_idle(struct ata_port *ap)
1707 {
1708 u8 status = ata_sff_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
1709
1710 #ifdef ATA_DEBUG
1711 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ)))
1712 ata_port_printk(ap, KERN_DEBUG, "abnormal Status 0x%X\n",
1713 status);
1714 #endif
1715
1716 return status;
1717 }
1718 #endif /* CONFIG_ATA_SFF */
1719
1720 #endif /* __LINUX_LIBATA_H__ */
kernel-based virtual machine