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