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Swarm: Fix crash due to missing initialization
[linux-2.6/pdupreez.git] / include / linux / libata.h
blob225bfc5bd9ec1eb43b143d059f926918a30c2656
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_INIT_MASK = (1 << 24) - 1,
150
151 ATA_DFLAG_DETACH = (1 << 24),
152 ATA_DFLAG_DETACHED = (1 << 25),
153
154 ATA_DEV_UNKNOWN = 0, /* unknown device */
155 ATA_DEV_ATA = 1, /* ATA device */
156 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */
157 ATA_DEV_ATAPI = 3, /* ATAPI device */
158 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */
159 ATA_DEV_PMP = 5, /* SATA port multiplier */
160 ATA_DEV_PMP_UNSUP = 6, /* SATA port multiplier (unsupported) */
161 ATA_DEV_SEMB = 7, /* SEMB */
162 ATA_DEV_SEMB_UNSUP = 8, /* SEMB (unsupported) */
163 ATA_DEV_NONE = 9, /* no device */
164
165 /* struct ata_link flags */
166 ATA_LFLAG_NO_HRST = (1 << 1), /* avoid hardreset */
167 ATA_LFLAG_NO_SRST = (1 << 2), /* avoid softreset */
168 ATA_LFLAG_ASSUME_ATA = (1 << 3), /* assume ATA class */
169 ATA_LFLAG_ASSUME_SEMB = (1 << 4), /* assume SEMB class */
170 ATA_LFLAG_ASSUME_CLASS = ATA_LFLAG_ASSUME_ATA | ATA_LFLAG_ASSUME_SEMB,
171 ATA_LFLAG_NO_RETRY = (1 << 5), /* don't retry this link */
172 ATA_LFLAG_DISABLED = (1 << 6), /* link is disabled */
173 ATA_LFLAG_SW_ACTIVITY = (1 << 7), /* keep activity stats */
174
175 /* struct ata_port flags */
176 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */
177 /* (doesn't imply presence) */
178 ATA_FLAG_SATA = (1 << 1),
179 ATA_FLAG_NO_LEGACY = (1 << 2), /* no legacy mode check */
180 ATA_FLAG_MMIO = (1 << 3), /* use MMIO, not PIO */
181 ATA_FLAG_SRST = (1 << 4), /* (obsolete) use ATA SRST, not E.D.D. */
182 ATA_FLAG_SATA_RESET = (1 << 5), /* (obsolete) use COMRESET */
183 ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */
184 ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */
185 ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */
186 ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD
187 * doesn't handle PIO interrupts */
188 ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */
189 ATA_FLAG_DEBUGMSG = (1 << 13),
190 ATA_FLAG_IGN_SIMPLEX = (1 << 15), /* ignore SIMPLEX */
191 ATA_FLAG_NO_IORDY = (1 << 16), /* controller lacks iordy */
192 ATA_FLAG_ACPI_SATA = (1 << 17), /* need native SATA ACPI layout */
193 ATA_FLAG_AN = (1 << 18), /* controller supports AN */
194 ATA_FLAG_PMP = (1 << 19), /* controller supports PMP */
195 ATA_FLAG_IPM = (1 << 20), /* driver can handle IPM */
196 ATA_FLAG_EM = (1 << 21), /* driver supports enclosure
197 * management */
198 ATA_FLAG_SW_ACTIVITY = (1 << 22), /* driver supports sw activity
199 * led */
200
201 /* The following flag belongs to ap->pflags but is kept in
202 * ap->flags because it's referenced in many LLDs and will be
203 * removed in not-too-distant future.
204 */
205 ATA_FLAG_DISABLED = (1 << 23), /* port is disabled, ignore it */
206
207 /* bits 24:31 of ap->flags are reserved for LLD specific flags */
208
209 /* struct ata_port pflags */
210 ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */
211 ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */
212 ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */
213 ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */
214 ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */
215 ATA_PFLAG_UNLOADING = (1 << 5), /* module is unloading */
216 ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */
217 ATA_PFLAG_INITIALIZING = (1 << 7), /* being initialized, don't touch */
218 ATA_PFLAG_RESETTING = (1 << 8), /* reset in progress */
219
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 /* struct ata_queued_cmd flags */
225 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */
226 ATA_QCFLAG_DMAMAP = (1 << 1), /* SG table is DMA mapped */
227 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */
228 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */
229 ATA_QCFLAG_CLEAR_EXCL = (1 << 5), /* clear excl_link on completion */
230 ATA_QCFLAG_QUIET = (1 << 6), /* don't report device error */
231 ATA_QCFLAG_RETRY = (1 << 7), /* retry after failure */
232
233 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */
234 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */
235 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */
236
237 /* host set flags */
238 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */
239 ATA_HOST_STARTED = (1 << 1), /* Host started */
240
241 /* bits 24:31 of host->flags are reserved for LLD specific flags */
242
243 /* various lengths of time */
244 ATA_TMOUT_BOOT = 30000, /* heuristic */
245 ATA_TMOUT_BOOT_QUICK = 7000, /* heuristic */
246 ATA_TMOUT_INTERNAL_QUICK = 5000,
247
248 /* FIXME: GoVault needs 2s but we can't afford that without
249 * parallel probing. 800ms is enough for iVDR disk
250 * HHD424020F7SV00. Increase to 2secs when parallel probing
251 * is in place.
252 */
253 ATA_TMOUT_FF_WAIT = 800,
254
255 /* Spec mandates to wait for ">= 2ms" before checking status
256 * after reset. We wait 150ms, because that was the magic
257 * delay used for ATAPI devices in Hale Landis's ATADRVR, for
258 * the period of time between when the ATA command register is
259 * written, and then status is checked. Because waiting for
260 * "a while" before checking status is fine, post SRST, we
261 * perform this magic delay here as well.
262 *
263 * Old drivers/ide uses the 2mS rule and then waits for ready.
264 */
265 ATA_WAIT_AFTER_RESET = 150,
266
267 /* If PMP is supported, we have to do follow-up SRST. As some
268 * PMPs don't send D2H Reg FIS after hardreset, LLDs are
269 * advised to wait only for the following duration before
270 * doing SRST.
271 */
272 ATA_TMOUT_PMP_SRST_WAIT = 1000,
273
274 /* ATA bus states */
275 BUS_UNKNOWN = 0,
276 BUS_DMA = 1,
277 BUS_IDLE = 2,
278 BUS_NOINTR = 3,
279 BUS_NODATA = 4,
280 BUS_TIMER = 5,
281 BUS_PIO = 6,
282 BUS_EDD = 7,
283 BUS_IDENTIFY = 8,
284 BUS_PACKET = 9,
285
286 /* SATA port states */
287 PORT_UNKNOWN = 0,
288 PORT_ENABLED = 1,
289 PORT_DISABLED = 2,
290
291 /* encoding various smaller bitmaps into a single
292 * unsigned long bitmap
293 */
294 ATA_NR_PIO_MODES = 7,
295 ATA_NR_MWDMA_MODES = 5,
296 ATA_NR_UDMA_MODES = 8,
297
298 ATA_SHIFT_PIO = 0,
299 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_NR_PIO_MODES,
300 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_NR_MWDMA_MODES,
301
302 /* size of buffer to pad xfers ending on unaligned boundaries */
303 ATA_DMA_PAD_SZ = 4,
304
305 /* ering size */
306 ATA_ERING_SIZE = 32,
307
308 /* return values for ->qc_defer */
309 ATA_DEFER_LINK = 1,
310 ATA_DEFER_PORT = 2,
311
312 /* desc_len for ata_eh_info and context */
313 ATA_EH_DESC_LEN = 80,
314
315 /* reset / recovery action types */
316 ATA_EH_REVALIDATE = (1 << 0),
317 ATA_EH_SOFTRESET = (1 << 1), /* meaningful only in ->prereset */
318 ATA_EH_HARDRESET = (1 << 2), /* meaningful only in ->prereset */
319 ATA_EH_RESET = ATA_EH_SOFTRESET | ATA_EH_HARDRESET,
320 ATA_EH_ENABLE_LINK = (1 << 3),
321 ATA_EH_LPM = (1 << 4), /* link power management action */
322
323 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE,
324
325 /* ata_eh_info->flags */
326 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */
327 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */
328 ATA_EHI_QUIET = (1 << 3), /* be quiet */
329
330 ATA_EHI_DID_SOFTRESET = (1 << 16), /* already soft-reset this port */
331 ATA_EHI_DID_HARDRESET = (1 << 17), /* already soft-reset this port */
332 ATA_EHI_PRINTINFO = (1 << 18), /* print configuration info */
333 ATA_EHI_SETMODE = (1 << 19), /* configure transfer mode */
334 ATA_EHI_POST_SETMODE = (1 << 20), /* revaildating after setmode */
335
336 ATA_EHI_DID_RESET = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET,
337
338 /* max tries if error condition is still set after ->error_handler */
339 ATA_EH_MAX_TRIES = 5,
340
341 /* how hard are we gonna try to probe/recover devices */
342 ATA_PROBE_MAX_TRIES = 3,
343 ATA_EH_DEV_TRIES = 3,
344 ATA_EH_PMP_TRIES = 5,
345 ATA_EH_PMP_LINK_TRIES = 3,
346
347 SATA_PMP_RW_TIMEOUT = 3000, /* PMP read/write timeout */
348
349 /* This should match the actual table size of
350 * ata_eh_cmd_timeout_table in libata-eh.c.
351 */
352 ATA_EH_CMD_TIMEOUT_TABLE_SIZE = 5,
353
354 /* Horkage types. May be set by libata or controller on drives
355 (some horkage may be drive/controller pair dependant */
356
357 ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */
358 ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */
359 ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */
360 ATA_HORKAGE_MAX_SEC_128 = (1 << 3), /* Limit max sects to 128 */
361 ATA_HORKAGE_BROKEN_HPA = (1 << 4), /* Broken HPA */
362 ATA_HORKAGE_DISABLE = (1 << 5), /* Disable it */
363 ATA_HORKAGE_HPA_SIZE = (1 << 6), /* native size off by one */
364 ATA_HORKAGE_IPM = (1 << 7), /* Link PM problems */
365 ATA_HORKAGE_IVB = (1 << 8), /* cbl det validity bit bugs */
366 ATA_HORKAGE_STUCK_ERR = (1 << 9), /* stuck ERR on next PACKET */
367
368 /* DMA mask for user DMA control: User visible values; DO NOT
369 renumber */
370 ATA_DMA_MASK_ATA = (1 << 0), /* DMA on ATA Disk */
371 ATA_DMA_MASK_ATAPI = (1 << 1), /* DMA on ATAPI */
372 ATA_DMA_MASK_CFA = (1 << 2), /* DMA on CF Card */
373
374 /* ATAPI command types */
375 ATAPI_READ = 0, /* READs */
376 ATAPI_WRITE = 1, /* WRITEs */
377 ATAPI_READ_CD = 2, /* READ CD [MSF] */
378 ATAPI_PASS_THRU = 3, /* SAT pass-thru */
379 ATAPI_MISC = 4, /* the rest */
380
381 /* Timing constants */
382 ATA_TIMING_SETUP = (1 << 0),
383 ATA_TIMING_ACT8B = (1 << 1),
384 ATA_TIMING_REC8B = (1 << 2),
385 ATA_TIMING_CYC8B = (1 << 3),
386 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
387 ATA_TIMING_CYC8B,
388 ATA_TIMING_ACTIVE = (1 << 4),
389 ATA_TIMING_RECOVER = (1 << 5),
390 ATA_TIMING_CYCLE = (1 << 6),
391 ATA_TIMING_UDMA = (1 << 7),
392 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
393 ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
394 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
395 ATA_TIMING_CYCLE | ATA_TIMING_UDMA,
396 };
397
398 enum ata_xfer_mask {
399 ATA_MASK_PIO = ((1LU << ATA_NR_PIO_MODES) - 1)
400 << ATA_SHIFT_PIO,
401 ATA_MASK_MWDMA = ((1LU << ATA_NR_MWDMA_MODES) - 1)
402 << ATA_SHIFT_MWDMA,
403 ATA_MASK_UDMA = ((1LU << ATA_NR_UDMA_MODES) - 1)
404 << ATA_SHIFT_UDMA,
405 };
406
407 enum hsm_task_states {
408 HSM_ST_IDLE, /* no command on going */
409 HSM_ST_FIRST, /* (waiting the device to)
410 write CDB or first data block */
411 HSM_ST, /* (waiting the device to) transfer data */
412 HSM_ST_LAST, /* (waiting the device to) complete command */
413 HSM_ST_ERR, /* error */
414 };
415
416 enum ata_completion_errors {
417 AC_ERR_DEV = (1 << 0), /* device reported error */
418 AC_ERR_HSM = (1 << 1), /* host state machine violation */
419 AC_ERR_TIMEOUT = (1 << 2), /* timeout */
420 AC_ERR_MEDIA = (1 << 3), /* media error */
421 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */
422 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */
423 AC_ERR_SYSTEM = (1 << 6), /* system error */
424 AC_ERR_INVALID = (1 << 7), /* invalid argument */
425 AC_ERR_OTHER = (1 << 8), /* unknown */
426 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */
427 AC_ERR_NCQ = (1 << 10), /* marker for offending NCQ qc */
428 };
429
430 /* forward declarations */
431 struct scsi_device;
432 struct ata_port_operations;
433 struct ata_port;
434 struct ata_link;
435 struct ata_queued_cmd;
436
437 /* typedefs */
438 typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
439 typedef int (*ata_prereset_fn_t)(struct ata_link *link, unsigned long deadline);
440 typedef int (*ata_reset_fn_t)(struct ata_link *link, unsigned int *classes,
441 unsigned long deadline);
442 typedef void (*ata_postreset_fn_t)(struct ata_link *link, unsigned int *classes);
443
444 /*
445 * host pm policy: If you alter this, you also need to alter libata-scsi.c
446 * (for the ascii descriptions)
447 */
448 enum link_pm {
449 NOT_AVAILABLE,
450 MIN_POWER,
451 MAX_PERFORMANCE,
452 MEDIUM_POWER,
453 };
454 extern struct device_attribute dev_attr_link_power_management_policy;
455 extern struct device_attribute dev_attr_em_message_type;
456 extern struct device_attribute dev_attr_em_message;
457 extern struct device_attribute dev_attr_sw_activity;
458
459 enum sw_activity {
460 OFF,
461 BLINK_ON,
462 BLINK_OFF,
463 };
464
465 #ifdef CONFIG_ATA_SFF
466 struct ata_ioports {
467 void __iomem *cmd_addr;
468 void __iomem *data_addr;
469 void __iomem *error_addr;
470 void __iomem *feature_addr;
471 void __iomem *nsect_addr;
472 void __iomem *lbal_addr;
473 void __iomem *lbam_addr;
474 void __iomem *lbah_addr;
475 void __iomem *device_addr;
476 void __iomem *status_addr;
477 void __iomem *command_addr;
478 void __iomem *altstatus_addr;
479 void __iomem *ctl_addr;
480 void __iomem *bmdma_addr;
481 void __iomem *scr_addr;
482 };
483 #endif /* CONFIG_ATA_SFF */
484
485 struct ata_host {
486 spinlock_t lock;
487 struct device *dev;
488 void __iomem * const *iomap;
489 unsigned int n_ports;
490 void *private_data;
491 struct ata_port_operations *ops;
492 unsigned long flags;
493 #ifdef CONFIG_ATA_ACPI
494 acpi_handle acpi_handle;
495 #endif
496 struct ata_port *simplex_claimed; /* channel owning the DMA */
497 struct ata_port *ports[0];
498 };
499
500 struct ata_queued_cmd {
501 struct ata_port *ap;
502 struct ata_device *dev;
503
504 struct scsi_cmnd *scsicmd;
505 void (*scsidone)(struct scsi_cmnd *);
506
507 struct ata_taskfile tf;
508 u8 cdb[ATAPI_CDB_LEN];
509
510 unsigned long flags; /* ATA_QCFLAG_xxx */
511 unsigned int tag;
512 unsigned int n_elem;
513
514 int dma_dir;
515
516 unsigned int sect_size;
517
518 unsigned int nbytes;
519 unsigned int extrabytes;
520 unsigned int curbytes;
521
522 struct scatterlist *cursg;
523 unsigned int cursg_ofs;
524
525 struct scatterlist sgent;
526
527 struct scatterlist *sg;
528
529 unsigned int err_mask;
530 struct ata_taskfile result_tf;
531 ata_qc_cb_t complete_fn;
532
533 void *private_data;
534 void *lldd_task;
535 };
536
537 struct ata_port_stats {
538 unsigned long unhandled_irq;
539 unsigned long idle_irq;
540 unsigned long rw_reqbuf;
541 };
542
543 struct ata_ering_entry {
544 unsigned int eflags;
545 unsigned int err_mask;
546 u64 timestamp;
547 };
548
549 struct ata_ering {
550 int cursor;
551 struct ata_ering_entry ring[ATA_ERING_SIZE];
552 };
553
554 struct ata_device {
555 struct ata_link *link;
556 unsigned int devno; /* 0 or 1 */
557 unsigned long flags; /* ATA_DFLAG_xxx */
558 unsigned int horkage; /* List of broken features */
559 struct scsi_device *sdev; /* attached SCSI device */
560 #ifdef CONFIG_ATA_ACPI
561 acpi_handle acpi_handle;
562 union acpi_object *gtf_cache;
563 #endif
564 /* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */
565 u64 n_sectors; /* size of device, if ATA */
566 unsigned int class; /* ATA_DEV_xxx */
567
568 u8 pio_mode;
569 u8 dma_mode;
570 u8 xfer_mode;
571 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
572
573 unsigned int multi_count; /* sectors count for
574 READ/WRITE MULTIPLE */
575 unsigned int max_sectors; /* per-device max sectors */
576 unsigned int cdb_len;
577
578 /* per-dev xfer mask */
579 unsigned long pio_mask;
580 unsigned long mwdma_mask;
581 unsigned long udma_mask;
582
583 /* for CHS addressing */
584 u16 cylinders; /* Number of cylinders */
585 u16 heads; /* Number of heads */
586 u16 sectors; /* Number of sectors per track */
587
588 /* error history */
589 int spdn_cnt;
590 struct ata_ering ering;
591
592 union {
593 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
594 u32 gscr[SATA_PMP_GSCR_DWORDS]; /* PMP GSCR block */
595 };
596 };
597
598 /* Offset into struct ata_device. Fields above it are maintained
599 * acress device init. Fields below are zeroed.
600 */
601 #define ATA_DEVICE_CLEAR_OFFSET offsetof(struct ata_device, n_sectors)
602
603 struct ata_eh_info {
604 struct ata_device *dev; /* offending device */
605 u32 serror; /* SError from LLDD */
606 unsigned int err_mask; /* port-wide err_mask */
607 unsigned int action; /* ATA_EH_* action mask */
608 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */
609 unsigned int flags; /* ATA_EHI_* flags */
610
611 unsigned int probe_mask;
612
613 char desc[ATA_EH_DESC_LEN];
614 int desc_len;
615 };
616
617 struct ata_eh_context {
618 struct ata_eh_info i;
619 int tries[ATA_MAX_DEVICES];
620 int cmd_timeout_idx[ATA_MAX_DEVICES]
621 [ATA_EH_CMD_TIMEOUT_TABLE_SIZE];
622 unsigned int classes[ATA_MAX_DEVICES];
623 unsigned int did_probe_mask;
624 unsigned int saved_ncq_enabled;
625 u8 saved_xfer_mode[ATA_MAX_DEVICES];
626 /* timestamp for the last reset attempt or success */
627 unsigned long last_reset;
628 };
629
630 struct ata_acpi_drive
631 {
632 u32 pio;
633 u32 dma;
634 } __packed;
635
636 struct ata_acpi_gtm {
637 struct ata_acpi_drive drive[2];
638 u32 flags;
639 } __packed;
640
641 struct ata_link {
642 struct ata_port *ap;
643 int pmp; /* port multiplier port # */
644
645 unsigned int active_tag; /* active tag on this link */
646 u32 sactive; /* active NCQ commands */
647
648 unsigned int flags; /* ATA_LFLAG_xxx */
649
650 u32 saved_scontrol; /* SControl on probe */
651 unsigned int hw_sata_spd_limit;
652 unsigned int sata_spd_limit;
653 unsigned int sata_spd; /* current SATA PHY speed */
654
655 /* record runtime error info, protected by host_set lock */
656 struct ata_eh_info eh_info;
657 /* EH context */
658 struct ata_eh_context eh_context;
659
660 struct ata_device device[ATA_MAX_DEVICES];
661 };
662
663 struct ata_port {
664 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */
665 struct ata_port_operations *ops;
666 spinlock_t *lock;
667 unsigned long flags; /* ATA_FLAG_xxx */
668 unsigned int pflags; /* ATA_PFLAG_xxx */
669 unsigned int print_id; /* user visible unique port ID */
670 unsigned int port_no; /* 0 based port no. inside the host */
671
672 struct ata_prd *prd; /* our SG list */
673 dma_addr_t prd_dma; /* and its DMA mapping */
674
675 #ifdef CONFIG_ATA_SFF
676 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
677 #endif /* CONFIG_ATA_SFF */
678
679 u8 ctl; /* cache of ATA control register */
680 u8 last_ctl; /* Cache last written value */
681 unsigned int pio_mask;
682 unsigned int mwdma_mask;
683 unsigned int udma_mask;
684 unsigned int cbl; /* cable type; ATA_CBL_xxx */
685
686 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
687 unsigned long qc_allocated;
688 unsigned int qc_active;
689 int nr_active_links; /* #links with active qcs */
690
691 struct ata_link link; /* host default link */
692
693 int nr_pmp_links; /* nr of available PMP links */
694 struct ata_link *pmp_link; /* array of PMP links */
695 struct ata_link *excl_link; /* for PMP qc exclusion */
696
697 struct ata_port_stats stats;
698 struct ata_host *host;
699 struct device *dev;
700
701 void *port_task_data;
702 struct delayed_work port_task;
703 struct delayed_work hotplug_task;
704 struct work_struct scsi_rescan_task;
705
706 unsigned int hsm_task_state;
707
708 u32 msg_enable;
709 struct list_head eh_done_q;
710 wait_queue_head_t eh_wait_q;
711 int eh_tries;
712
713 pm_message_t pm_mesg;
714 int *pm_result;
715 enum link_pm pm_policy;
716
717 struct timer_list fastdrain_timer;
718 unsigned long fastdrain_cnt;
719
720 int em_message_type;
721 void *private_data;
722
723 #ifdef CONFIG_ATA_ACPI
724 acpi_handle acpi_handle;
725 struct ata_acpi_gtm __acpi_init_gtm; /* use ata_acpi_init_gtm() */
726 #endif
727 u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */
728 };
729
730 /* The following initializer overrides a method to NULL whether one of
731 * its parent has the method defined or not. This is equivalent to
732 * ERR_PTR(-ENOENT). Unfortunately, ERR_PTR doesn't render a constant
733 * expression and thus can't be used as an initializer.
734 */
735 #define ATA_OP_NULL (void *)(unsigned long)(-ENOENT)
736
737 struct ata_port_operations {
738 /*
739 * Command execution
740 */
741 int (*qc_defer)(struct ata_queued_cmd *qc);
742 int (*check_atapi_dma)(struct ata_queued_cmd *qc);
743 void (*qc_prep)(struct ata_queued_cmd *qc);
744 unsigned int (*qc_issue)(struct ata_queued_cmd *qc);
745 bool (*qc_fill_rtf)(struct ata_queued_cmd *qc);
746
747 /*
748 * Configuration and exception handling
749 */
750 int (*cable_detect)(struct ata_port *ap);
751 unsigned long (*mode_filter)(struct ata_device *dev, unsigned long xfer_mask);
752 void (*set_piomode)(struct ata_port *ap, struct ata_device *dev);
753 void (*set_dmamode)(struct ata_port *ap, struct ata_device *dev);
754 int (*set_mode)(struct ata_link *link, struct ata_device **r_failed_dev);
755 unsigned int (*read_id)(struct ata_device *dev, struct ata_taskfile *tf, u16 *id);
756
757 void (*dev_config)(struct ata_device *dev);
758
759 void (*freeze)(struct ata_port *ap);
760 void (*thaw)(struct ata_port *ap);
761 ata_prereset_fn_t prereset;
762 ata_reset_fn_t softreset;
763 ata_reset_fn_t hardreset;
764 ata_postreset_fn_t postreset;
765 ata_prereset_fn_t pmp_prereset;
766 ata_reset_fn_t pmp_softreset;
767 ata_reset_fn_t pmp_hardreset;
768 ata_postreset_fn_t pmp_postreset;
769 void (*error_handler)(struct ata_port *ap);
770 void (*post_internal_cmd)(struct ata_queued_cmd *qc);
771
772 /*
773 * Optional features
774 */
775 int (*scr_read)(struct ata_port *ap, unsigned int sc_reg, u32 *val);
776 int (*scr_write)(struct ata_port *ap, unsigned int sc_reg, u32 val);
777 void (*pmp_attach)(struct ata_port *ap);
778 void (*pmp_detach)(struct ata_port *ap);
779 int (*enable_pm)(struct ata_port *ap, enum link_pm policy);
780 void (*disable_pm)(struct ata_port *ap);
781
782 /*
783 * Start, stop, suspend and resume
784 */
785 int (*port_suspend)(struct ata_port *ap, pm_message_t mesg);
786 int (*port_resume)(struct ata_port *ap);
787 int (*port_start)(struct ata_port *ap);
788 void (*port_stop)(struct ata_port *ap);
789 void (*host_stop)(struct ata_host *host);
790
791 #ifdef CONFIG_ATA_SFF
792 /*
793 * SFF / taskfile oriented ops
794 */
795 void (*sff_dev_select)(struct ata_port *ap, unsigned int device);
796 u8 (*sff_check_status)(struct ata_port *ap);
797 u8 (*sff_check_altstatus)(struct ata_port *ap);
798 void (*sff_tf_load)(struct ata_port *ap, const struct ata_taskfile *tf);
799 void (*sff_tf_read)(struct ata_port *ap, struct ata_taskfile *tf);
800 void (*sff_exec_command)(struct ata_port *ap,
801 const struct ata_taskfile *tf);
802 unsigned int (*sff_data_xfer)(struct ata_device *dev,
803 unsigned char *buf, unsigned int buflen, int rw);
804 u8 (*sff_irq_on)(struct ata_port *);
805 void (*sff_irq_clear)(struct ata_port *);
806
807 void (*bmdma_setup)(struct ata_queued_cmd *qc);
808 void (*bmdma_start)(struct ata_queued_cmd *qc);
809 void (*bmdma_stop)(struct ata_queued_cmd *qc);
810 u8 (*bmdma_status)(struct ata_port *ap);
811 #endif /* CONFIG_ATA_SFF */
812
813 ssize_t (*em_show)(struct ata_port *ap, char *buf);
814 ssize_t (*em_store)(struct ata_port *ap, const char *message,
815 size_t size);
816 ssize_t (*sw_activity_show)(struct ata_device *dev, char *buf);
817 ssize_t (*sw_activity_store)(struct ata_device *dev,
818 enum sw_activity val);
819 /*
820 * Obsolete
821 */
822 void (*phy_reset)(struct ata_port *ap);
823 void (*eng_timeout)(struct ata_port *ap);
824
825 /*
826 * ->inherits must be the last field and all the preceding
827 * fields must be pointers.
828 */
829 const struct ata_port_operations *inherits;
830 };
831
832 struct ata_port_info {
833 unsigned long flags;
834 unsigned long link_flags;
835 unsigned long pio_mask;
836 unsigned long mwdma_mask;
837 unsigned long udma_mask;
838 struct ata_port_operations *port_ops;
839 void *private_data;
840 };
841
842 struct ata_timing {
843 unsigned short mode; /* ATA mode */
844 unsigned short setup; /* t1 */
845 unsigned short act8b; /* t2 for 8-bit I/O */
846 unsigned short rec8b; /* t2i for 8-bit I/O */
847 unsigned short cyc8b; /* t0 for 8-bit I/O */
848 unsigned short active; /* t2 or tD */
849 unsigned short recover; /* t2i or tK */
850 unsigned short cycle; /* t0 */
851 unsigned short udma; /* t2CYCTYP/2 */
852 };
853
854 /*
855 * Core layer - drivers/ata/libata-core.c
856 */
857 extern const unsigned long sata_deb_timing_normal[];
858 extern const unsigned long sata_deb_timing_hotplug[];
859 extern const unsigned long sata_deb_timing_long[];
860
861 extern struct ata_port_operations ata_dummy_port_ops;
862 extern const struct ata_port_info ata_dummy_port_info;
863
864 static inline const unsigned long *
865 sata_ehc_deb_timing(struct ata_eh_context *ehc)
866 {
867 if (ehc->i.flags & ATA_EHI_HOTPLUGGED)
868 return sata_deb_timing_hotplug;
869 else
870 return sata_deb_timing_normal;
871 }
872
873 static inline int ata_port_is_dummy(struct ata_port *ap)
874 {
875 return ap->ops == &ata_dummy_port_ops;
876 }
877
878 extern void ata_port_probe(struct ata_port *);
879 extern int sata_set_spd(struct ata_link *link);
880 extern int ata_std_prereset(struct ata_link *link, unsigned long deadline);
881 extern int ata_wait_after_reset(struct ata_link *link, unsigned long deadline,
882 int (*check_ready)(struct ata_link *link));
883 extern int sata_link_debounce(struct ata_link *link,
884 const unsigned long *params, unsigned long deadline);
885 extern int sata_link_resume(struct ata_link *link, const unsigned long *params,
886 unsigned long deadline);
887 extern int sata_link_hardreset(struct ata_link *link,
888 const unsigned long *timing, unsigned long deadline,
889 bool *online, int (*check_ready)(struct ata_link *));
890 extern int sata_std_hardreset(struct ata_link *link, unsigned int *class,
891 unsigned long deadline);
892 extern void ata_std_postreset(struct ata_link *link, unsigned int *classes);
893 extern void ata_port_disable(struct ata_port *);
894
895 extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports);
896 extern struct ata_host *ata_host_alloc_pinfo(struct device *dev,
897 const struct ata_port_info * const * ppi, int n_ports);
898 extern int ata_host_start(struct ata_host *host);
899 extern int ata_host_register(struct ata_host *host,
900 struct scsi_host_template *sht);
901 extern int ata_host_activate(struct ata_host *host, int irq,
902 irq_handler_t irq_handler, unsigned long irq_flags,
903 struct scsi_host_template *sht);
904 extern void ata_host_detach(struct ata_host *host);
905 extern void ata_host_init(struct ata_host *, struct device *,
906 unsigned long, struct ata_port_operations *);
907 extern int ata_scsi_detect(struct scsi_host_template *sht);
908 extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
909 extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *));
910 extern void ata_sas_port_destroy(struct ata_port *);
911 extern struct ata_port *ata_sas_port_alloc(struct ata_host *,
912 struct ata_port_info *, struct Scsi_Host *);
913 extern int ata_sas_port_init(struct ata_port *);
914 extern int ata_sas_port_start(struct ata_port *ap);
915 extern void ata_sas_port_stop(struct ata_port *ap);
916 extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *);
917 extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
918 struct ata_port *ap);
919 extern int sata_scr_valid(struct ata_link *link);
920 extern int sata_scr_read(struct ata_link *link, int reg, u32 *val);
921 extern int sata_scr_write(struct ata_link *link, int reg, u32 val);
922 extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val);
923 extern int ata_link_online(struct ata_link *link);
924 extern int ata_link_offline(struct ata_link *link);
925 #ifdef CONFIG_PM
926 extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg);
927 extern void ata_host_resume(struct ata_host *host);
928 #endif
929 extern int ata_ratelimit(void);
930 extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
931 unsigned long interval, unsigned long timeout);
932 extern int atapi_cmd_type(u8 opcode);
933 extern void ata_tf_to_fis(const struct ata_taskfile *tf,
934 u8 pmp, int is_cmd, u8 *fis);
935 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
936 extern unsigned long ata_pack_xfermask(unsigned long pio_mask,
937 unsigned long mwdma_mask, unsigned long udma_mask);
938 extern void ata_unpack_xfermask(unsigned long xfer_mask,
939 unsigned long *pio_mask, unsigned long *mwdma_mask,
940 unsigned long *udma_mask);
941 extern u8 ata_xfer_mask2mode(unsigned long xfer_mask);
942 extern unsigned long ata_xfer_mode2mask(u8 xfer_mode);
943 extern int ata_xfer_mode2shift(unsigned long xfer_mode);
944 extern const char *ata_mode_string(unsigned long xfer_mask);
945 extern unsigned long ata_id_xfermask(const u16 *id);
946 extern int ata_port_start(struct ata_port *ap);
947 extern int ata_std_qc_defer(struct ata_queued_cmd *qc);
948 extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
949 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
950 unsigned int n_elem);
951 extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
952 extern void ata_dev_disable(struct ata_device *adev);
953 extern void ata_id_string(const u16 *id, unsigned char *s,
954 unsigned int ofs, unsigned int len);
955 extern void ata_id_c_string(const u16 *id, unsigned char *s,
956 unsigned int ofs, unsigned int len);
957 extern unsigned int ata_do_dev_read_id(struct ata_device *dev,
958 struct ata_taskfile *tf, u16 *id);
959 extern void ata_qc_complete(struct ata_queued_cmd *qc);
960 extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active);
961 extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
962 void (*done)(struct scsi_cmnd *));
963 extern int ata_std_bios_param(struct scsi_device *sdev,
964 struct block_device *bdev,
965 sector_t capacity, int geom[]);
966 extern int ata_scsi_slave_config(struct scsi_device *sdev);
967 extern void ata_scsi_slave_destroy(struct scsi_device *sdev);
968 extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
969 int queue_depth);
970 extern struct ata_device *ata_dev_pair(struct ata_device *adev);
971 extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev);
972
973 extern int ata_cable_40wire(struct ata_port *ap);
974 extern int ata_cable_80wire(struct ata_port *ap);
975 extern int ata_cable_sata(struct ata_port *ap);
976 extern int ata_cable_ignore(struct ata_port *ap);
977 extern int ata_cable_unknown(struct ata_port *ap);
978
979 /* Timing helpers */
980 extern unsigned int ata_pio_need_iordy(const struct ata_device *);
981 extern const struct ata_timing *ata_timing_find_mode(u8 xfer_mode);
982 extern int ata_timing_compute(struct ata_device *, unsigned short,
983 struct ata_timing *, int, int);
984 extern void ata_timing_merge(const struct ata_timing *,
985 const struct ata_timing *, struct ata_timing *,
986 unsigned int);
987 extern u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle);
988
989 /* PCI */
990 #ifdef CONFIG_PCI
991 struct pci_dev;
992
993 struct pci_bits {
994 unsigned int reg; /* PCI config register to read */
995 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
996 unsigned long mask;
997 unsigned long val;
998 };
999
1000 extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
1001 extern void ata_pci_remove_one(struct pci_dev *pdev);
1002
1003 #ifdef CONFIG_PM
1004 extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg);
1005 extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev);
1006 extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
1007 extern int ata_pci_device_resume(struct pci_dev *pdev);
1008 #endif /* CONFIG_PM */
1009 #endif /* CONFIG_PCI */
1010
1011 /*
1012 * ACPI - drivers/ata/libata-acpi.c
1013 */
1014 #ifdef CONFIG_ATA_ACPI
1015 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
1016 {
1017 if (ap->pflags & ATA_PFLAG_INIT_GTM_VALID)
1018 return &ap->__acpi_init_gtm;
1019 return NULL;
1020 }
1021 int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm);
1022 int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *stm);
1023 unsigned long ata_acpi_gtm_xfermask(struct ata_device *dev,
1024 const struct ata_acpi_gtm *gtm);
1025 int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm);
1026 #else
1027 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
1028 {
1029 return NULL;
1030 }
1031
1032 static inline int ata_acpi_stm(const struct ata_port *ap,
1033 struct ata_acpi_gtm *stm)
1034 {
1035 return -ENOSYS;
1036 }
1037
1038 static inline int ata_acpi_gtm(const struct ata_port *ap,
1039 struct ata_acpi_gtm *stm)
1040 {
1041 return -ENOSYS;
1042 }
1043
1044 static inline unsigned int ata_acpi_gtm_xfermask(struct ata_device *dev,
1045 const struct ata_acpi_gtm *gtm)
1046 {
1047 return 0;
1048 }
1049
1050 static inline int ata_acpi_cbl_80wire(struct ata_port *ap,
1051 const struct ata_acpi_gtm *gtm)
1052 {
1053 return 0;
1054 }
1055 #endif
1056
1057 /*
1058 * EH - drivers/ata/libata-eh.c
1059 */
1060 extern void ata_port_schedule_eh(struct ata_port *ap);
1061 extern int ata_link_abort(struct ata_link *link);
1062 extern int ata_port_abort(struct ata_port *ap);
1063 extern int ata_port_freeze(struct ata_port *ap);
1064 extern int sata_async_notification(struct ata_port *ap);
1065
1066 extern void ata_eh_freeze_port(struct ata_port *ap);
1067 extern void ata_eh_thaw_port(struct ata_port *ap);
1068
1069 extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
1070 extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
1071 extern void ata_eh_analyze_ncq_error(struct ata_link *link);
1072
1073 extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
1074 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
1075 ata_postreset_fn_t postreset);
1076 extern void ata_std_error_handler(struct ata_port *ap);
1077
1078 /*
1079 * Base operations to inherit from and initializers for sht
1080 *
1081 * Operations
1082 *
1083 * base : Common to all libata drivers.
1084 * sata : SATA controllers w/ native interface.
1085 * pmp : SATA controllers w/ PMP support.
1086 * sff : SFF ATA controllers w/o BMDMA support.
1087 * bmdma : SFF ATA controllers w/ BMDMA support.
1088 *
1089 * sht initializers
1090 *
1091 * BASE : Common to all libata drivers. The user must set
1092 * sg_tablesize and dma_boundary.
1093 * PIO : SFF ATA controllers w/ only PIO support.
1094 * BMDMA : SFF ATA controllers w/ BMDMA support. sg_tablesize and
1095 * dma_boundary are set to BMDMA limits.
1096 * NCQ : SATA controllers supporting NCQ. The user must set
1097 * sg_tablesize, dma_boundary and can_queue.
1098 */
1099 extern const struct ata_port_operations ata_base_port_ops;
1100 extern const struct ata_port_operations sata_port_ops;
1101
1102 #define ATA_BASE_SHT(drv_name) \
1103 .module = THIS_MODULE, \
1104 .name = drv_name, \
1105 .ioctl = ata_scsi_ioctl, \
1106 .queuecommand = ata_scsi_queuecmd, \
1107 .can_queue = ATA_DEF_QUEUE, \
1108 .this_id = ATA_SHT_THIS_ID, \
1109 .cmd_per_lun = ATA_SHT_CMD_PER_LUN, \
1110 .emulated = ATA_SHT_EMULATED, \
1111 .use_clustering = ATA_SHT_USE_CLUSTERING, \
1112 .proc_name = drv_name, \
1113 .slave_configure = ata_scsi_slave_config, \
1114 .slave_destroy = ata_scsi_slave_destroy, \
1115 .bios_param = ata_std_bios_param
1116
1117 #define ATA_NCQ_SHT(drv_name) \
1118 ATA_BASE_SHT(drv_name), \
1119 .change_queue_depth = ata_scsi_change_queue_depth
1120
1121 /*
1122 * PMP helpers
1123 */
1124 #ifdef CONFIG_SATA_PMP
1125 static inline bool sata_pmp_supported(struct ata_port *ap)
1126 {
1127 return ap->flags & ATA_FLAG_PMP;
1128 }
1129
1130 static inline bool sata_pmp_attached(struct ata_port *ap)
1131 {
1132 return ap->nr_pmp_links != 0;
1133 }
1134
1135 static inline int ata_is_host_link(const struct ata_link *link)
1136 {
1137 return link == &link->ap->link;
1138 }
1139 #else /* CONFIG_SATA_PMP */
1140 static inline bool sata_pmp_supported(struct ata_port *ap)
1141 {
1142 return false;
1143 }
1144
1145 static inline bool sata_pmp_attached(struct ata_port *ap)
1146 {
1147 return false;
1148 }
1149
1150 static inline int ata_is_host_link(const struct ata_link *link)
1151 {
1152 return 1;
1153 }
1154 #endif /* CONFIG_SATA_PMP */
1155
1156 static inline int sata_srst_pmp(struct ata_link *link)
1157 {
1158 if (sata_pmp_supported(link->ap) && ata_is_host_link(link))
1159 return SATA_PMP_CTRL_PORT;
1160 return link->pmp;
1161 }
1162
1163 /*
1164 * printk helpers
1165 */
1166 #define ata_port_printk(ap, lv, fmt, args...) \
1167 printk("%sata%u: "fmt, lv, (ap)->print_id , ##args)
1168
1169 #define ata_link_printk(link, lv, fmt, args...) do { \
1170 if (sata_pmp_attached((link)->ap)) \
1171 printk("%sata%u.%02u: "fmt, lv, (link)->ap->print_id, \
1172 (link)->pmp , ##args); \
1173 else \
1174 printk("%sata%u: "fmt, lv, (link)->ap->print_id , ##args); \
1175 } while(0)
1176
1177 #define ata_dev_printk(dev, lv, fmt, args...) \
1178 printk("%sata%u.%02u: "fmt, lv, (dev)->link->ap->print_id, \
1179 (dev)->link->pmp + (dev)->devno , ##args)
1180
1181 /*
1182 * ata_eh_info helpers
1183 */
1184 extern void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...)
1185 __attribute__ ((format (printf, 2, 3)));
1186 extern void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...)
1187 __attribute__ ((format (printf, 2, 3)));
1188 extern void ata_ehi_clear_desc(struct ata_eh_info *ehi);
1189
1190 static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
1191 {
1192 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
1193 ehi->flags |= ATA_EHI_HOTPLUGGED;
1194 ehi->action |= ATA_EH_RESET | ATA_EH_ENABLE_LINK;
1195 ehi->err_mask |= AC_ERR_ATA_BUS;
1196 }
1197
1198 /*
1199 * port description helpers
1200 */
1201 extern void ata_port_desc(struct ata_port *ap, const char *fmt, ...)
1202 __attribute__ ((format (printf, 2, 3)));
1203 #ifdef CONFIG_PCI
1204 extern void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset,
1205 const char *name);
1206 #endif
1207
1208 static inline unsigned int ata_tag_valid(unsigned int tag)
1209 {
1210 return (tag < ATA_MAX_QUEUE) ? 1 : 0;
1211 }
1212
1213 static inline unsigned int ata_tag_internal(unsigned int tag)
1214 {
1215 return tag == ATA_TAG_INTERNAL;
1216 }
1217
1218 /*
1219 * device helpers
1220 */
1221 static inline unsigned int ata_class_enabled(unsigned int class)
1222 {
1223 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI ||
1224 class == ATA_DEV_PMP || class == ATA_DEV_SEMB;
1225 }
1226
1227 static inline unsigned int ata_class_disabled(unsigned int class)
1228 {
1229 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP ||
1230 class == ATA_DEV_PMP_UNSUP || class == ATA_DEV_SEMB_UNSUP;
1231 }
1232
1233 static inline unsigned int ata_class_absent(unsigned int class)
1234 {
1235 return !ata_class_enabled(class) && !ata_class_disabled(class);
1236 }
1237
1238 static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
1239 {
1240 return ata_class_enabled(dev->class);
1241 }
1242
1243 static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
1244 {
1245 return ata_class_disabled(dev->class);
1246 }
1247
1248 static inline unsigned int ata_dev_absent(const struct ata_device *dev)
1249 {
1250 return ata_class_absent(dev->class);
1251 }
1252
1253 /*
1254 * link helpers
1255 */
1256 static inline int ata_link_max_devices(const struct ata_link *link)
1257 {
1258 if (ata_is_host_link(link) && link->ap->flags & ATA_FLAG_SLAVE_POSS)
1259 return 2;
1260 return 1;
1261 }
1262
1263 static inline int ata_link_active(struct ata_link *link)
1264 {
1265 return ata_tag_valid(link->active_tag) || link->sactive;
1266 }
1267
1268 static inline struct ata_link *ata_port_first_link(struct ata_port *ap)
1269 {
1270 if (sata_pmp_attached(ap))
1271 return ap->pmp_link;
1272 return &ap->link;
1273 }
1274
1275 static inline struct ata_link *ata_port_next_link(struct ata_link *link)
1276 {
1277 struct ata_port *ap = link->ap;
1278
1279 if (ata_is_host_link(link)) {
1280 if (!sata_pmp_attached(ap))
1281 return NULL;
1282 return ap->pmp_link;
1283 }
1284
1285 if (++link < ap->nr_pmp_links + ap->pmp_link)
1286 return link;
1287 return NULL;
1288 }
1289
1290 #define __ata_port_for_each_link(lk, ap) \
1291 for ((lk) = &(ap)->link; (lk); (lk) = ata_port_next_link(lk))
1292
1293 #define ata_port_for_each_link(link, ap) \
1294 for ((link) = ata_port_first_link(ap); (link); \
1295 (link) = ata_port_next_link(link))
1296
1297 #define ata_link_for_each_dev(dev, link) \
1298 for ((dev) = (link)->device; \
1299 (dev) < (link)->device + ata_link_max_devices(link) || ((dev) = NULL); \
1300 (dev)++)
1301
1302 #define ata_link_for_each_dev_reverse(dev, link) \
1303 for ((dev) = (link)->device + ata_link_max_devices(link) - 1; \
1304 (dev) >= (link)->device || ((dev) = NULL); (dev)--)
1305
1306 /**
1307 * ata_ncq_enabled - Test whether NCQ is enabled
1308 * @dev: ATA device to test for
1309 *
1310 * LOCKING:
1311 * spin_lock_irqsave(host lock)
1312 *
1313 * RETURNS:
1314 * 1 if NCQ is enabled for @dev, 0 otherwise.
1315 */
1316 static inline int ata_ncq_enabled(struct ata_device *dev)
1317 {
1318 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF |
1319 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ;
1320 }
1321
1322 static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
1323 {
1324 qc->tf.ctl |= ATA_NIEN;
1325 }
1326
1327 static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap,
1328 unsigned int tag)
1329 {
1330 if (likely(ata_tag_valid(tag)))
1331 return &ap->qcmd[tag];
1332 return NULL;
1333 }
1334
1335 static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap,
1336 unsigned int tag)
1337 {
1338 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
1339
1340 if (unlikely(!qc) || !ap->ops->error_handler)
1341 return qc;
1342
1343 if ((qc->flags & (ATA_QCFLAG_ACTIVE |
1344 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE)
1345 return qc;
1346
1347 return NULL;
1348 }
1349
1350 static inline unsigned int ata_qc_raw_nbytes(struct ata_queued_cmd *qc)
1351 {
1352 return qc->nbytes - min(qc->extrabytes, qc->nbytes);
1353 }
1354
1355 static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
1356 {
1357 memset(tf, 0, sizeof(*tf));
1358
1359 tf->ctl = dev->link->ap->ctl;
1360 if (dev->devno == 0)
1361 tf->device = ATA_DEVICE_OBS;
1362 else
1363 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
1364 }
1365
1366 static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
1367 {
1368 qc->dma_dir = DMA_NONE;
1369 qc->sg = NULL;
1370 qc->flags = 0;
1371 qc->cursg = NULL;
1372 qc->cursg_ofs = 0;
1373 qc->nbytes = qc->extrabytes = qc->curbytes = 0;
1374 qc->n_elem = 0;
1375 qc->err_mask = 0;
1376 qc->sect_size = ATA_SECT_SIZE;
1377
1378 ata_tf_init(qc->dev, &qc->tf);
1379
1380 /* init result_tf such that it indicates normal completion */
1381 qc->result_tf.command = ATA_DRDY;
1382 qc->result_tf.feature = 0;
1383 }
1384
1385 static inline int ata_try_flush_cache(const struct ata_device *dev)
1386 {
1387 return ata_id_wcache_enabled(dev->id) ||
1388 ata_id_has_flush(dev->id) ||
1389 ata_id_has_flush_ext(dev->id);
1390 }
1391
1392 static inline unsigned int ac_err_mask(u8 status)
1393 {
1394 if (status & (ATA_BUSY | ATA_DRQ))
1395 return AC_ERR_HSM;
1396 if (status & (ATA_ERR | ATA_DF))
1397 return AC_ERR_DEV;
1398 return 0;
1399 }
1400
1401 static inline unsigned int __ac_err_mask(u8 status)
1402 {
1403 unsigned int mask = ac_err_mask(status);
1404 if (mask == 0)
1405 return AC_ERR_OTHER;
1406 return mask;
1407 }
1408
1409 static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
1410 {
1411 return *(struct ata_port **)&host->hostdata[0];
1412 }
1413
1414 static inline int ata_check_ready(u8 status)
1415 {
1416 if (!(status & ATA_BUSY))
1417 return 1;
1418
1419 /* 0xff indicates either no device or device not ready */
1420 if (status == 0xff)
1421 return -ENODEV;
1422
1423 return 0;
1424 }
1425
1426 static inline unsigned long ata_deadline(unsigned long from_jiffies,
1427 unsigned long timeout_msecs)
1428 {
1429 return from_jiffies + msecs_to_jiffies(timeout_msecs);
1430 }
1431
1432 /* Don't open code these in drivers as there are traps. Firstly the range may
1433 change in future hardware and specs, secondly 0xFF means 'no DMA' but is
1434 > UDMA_0. Dyma ddreigiau */
1435
1436 static inline int ata_using_mwdma(struct ata_device *adev)
1437 {
1438 if (adev->dma_mode >= XFER_MW_DMA_0 && adev->dma_mode <= XFER_MW_DMA_4)
1439 return 1;
1440 return 0;
1441 }
1442
1443 static inline int ata_using_udma(struct ata_device *adev)
1444 {
1445 if (adev->dma_mode >= XFER_UDMA_0 && adev->dma_mode <= XFER_UDMA_7)
1446 return 1;
1447 return 0;
1448 }
1449
1450 static inline int ata_dma_enabled(struct ata_device *adev)
1451 {
1452 return (adev->dma_mode == 0xFF ? 0 : 1);
1453 }
1454
1455 /**************************************************************************
1456 * PMP - drivers/ata/libata-pmp.c
1457 */
1458 #ifdef CONFIG_SATA_PMP
1459
1460 extern const struct ata_port_operations sata_pmp_port_ops;
1461
1462 extern int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc);
1463 extern void sata_pmp_error_handler(struct ata_port *ap);
1464
1465 #else /* CONFIG_SATA_PMP */
1466
1467 #define sata_pmp_port_ops sata_port_ops
1468 #define sata_pmp_qc_defer_cmd_switch ata_std_qc_defer
1469 #define sata_pmp_error_handler ata_std_error_handler
1470
1471 #endif /* CONFIG_SATA_PMP */
1472
1473
1474 /**************************************************************************
1475 * SFF - drivers/ata/libata-sff.c
1476 */
1477 #ifdef CONFIG_ATA_SFF
1478
1479 extern const struct ata_port_operations ata_sff_port_ops;
1480 extern const struct ata_port_operations ata_bmdma_port_ops;
1481
1482 /* PIO only, sg_tablesize and dma_boundary limits can be removed */
1483 #define ATA_PIO_SHT(drv_name) \
1484 ATA_BASE_SHT(drv_name), \
1485 .sg_tablesize = LIBATA_MAX_PRD, \
1486 .dma_boundary = ATA_DMA_BOUNDARY
1487
1488 #define ATA_BMDMA_SHT(drv_name) \
1489 ATA_BASE_SHT(drv_name), \
1490 .sg_tablesize = LIBATA_MAX_PRD, \
1491 .dma_boundary = ATA_DMA_BOUNDARY
1492
1493 extern void ata_sff_qc_prep(struct ata_queued_cmd *qc);
1494 extern void ata_sff_dumb_qc_prep(struct ata_queued_cmd *qc);
1495 extern void ata_sff_dev_select(struct ata_port *ap, unsigned int device);
1496 extern u8 ata_sff_check_status(struct ata_port *ap);
1497 extern void ata_sff_pause(struct ata_port *ap);
1498 extern void ata_sff_dma_pause(struct ata_port *ap);
1499 extern int ata_sff_busy_sleep(struct ata_port *ap,
1500 unsigned long timeout_pat, unsigned long timeout);
1501 extern int ata_sff_wait_ready(struct ata_link *link, unsigned long deadline);
1502 extern void ata_sff_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
1503 extern void ata_sff_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
1504 extern void ata_sff_exec_command(struct ata_port *ap,
1505 const struct ata_taskfile *tf);
1506 extern unsigned int ata_sff_data_xfer(struct ata_device *dev,
1507 unsigned char *buf, unsigned int buflen, int rw);
1508 extern unsigned int ata_sff_data_xfer_noirq(struct ata_device *dev,
1509 unsigned char *buf, unsigned int buflen, int rw);
1510 extern u8 ata_sff_irq_on(struct ata_port *ap);
1511 extern void ata_sff_irq_clear(struct ata_port *ap);
1512 extern int ata_sff_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
1513 u8 status, int in_wq);
1514 extern unsigned int ata_sff_qc_issue(struct ata_queued_cmd *qc);
1515 extern bool ata_sff_qc_fill_rtf(struct ata_queued_cmd *qc);
1516 extern unsigned int ata_sff_host_intr(struct ata_port *ap,
1517 struct ata_queued_cmd *qc);
1518 extern irqreturn_t ata_sff_interrupt(int irq, void *dev_instance);
1519 extern void ata_sff_freeze(struct ata_port *ap);
1520 extern void ata_sff_thaw(struct ata_port *ap);
1521 extern int ata_sff_prereset(struct ata_link *link, unsigned long deadline);
1522 extern unsigned int ata_sff_dev_classify(struct ata_device *dev, int present,
1523 u8 *r_err);
1524 extern int ata_sff_wait_after_reset(struct ata_link *link, unsigned int devmask,
1525 unsigned long deadline);
1526 extern int ata_sff_softreset(struct ata_link *link, unsigned int *classes,
1527 unsigned long deadline);
1528 extern int sata_sff_hardreset(struct ata_link *link, unsigned int *class,
1529 unsigned long deadline);
1530 extern void ata_sff_postreset(struct ata_link *link, unsigned int *classes);
1531 extern void ata_sff_error_handler(struct ata_port *ap);
1532 extern void ata_sff_post_internal_cmd(struct ata_queued_cmd *qc);
1533 extern int ata_sff_port_start(struct ata_port *ap);
1534 extern void ata_sff_std_ports(struct ata_ioports *ioaddr);
1535 extern unsigned long ata_bmdma_mode_filter(struct ata_device *dev,
1536 unsigned long xfer_mask);
1537 extern void ata_bmdma_setup(struct ata_queued_cmd *qc);
1538 extern void ata_bmdma_start(struct ata_queued_cmd *qc);
1539 extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
1540 extern u8 ata_bmdma_status(struct ata_port *ap);
1541 extern void ata_bus_reset(struct ata_port *ap);
1542
1543 #ifdef CONFIG_PCI
1544 extern int ata_pci_bmdma_clear_simplex(struct pci_dev *pdev);
1545 extern int ata_pci_bmdma_init(struct ata_host *host);
1546 extern int ata_pci_sff_init_host(struct ata_host *host);
1547 extern int ata_pci_sff_prepare_host(struct pci_dev *pdev,
1548 const struct ata_port_info * const * ppi,
1549 struct ata_host **r_host);
1550 extern int ata_pci_sff_activate_host(struct ata_host *host,
1551 irq_handler_t irq_handler,
1552 struct scsi_host_template *sht);
1553 extern int ata_pci_sff_init_one(struct pci_dev *pdev,
1554 const struct ata_port_info * const * ppi,
1555 struct scsi_host_template *sht, void *host_priv);
1556 #endif /* CONFIG_PCI */
1557
1558 /**
1559 * ata_sff_busy_wait - Wait for a port status register
1560 * @ap: Port to wait for.
1561 * @bits: bits that must be clear
1562 * @max: number of 10uS waits to perform
1563 *
1564 * Waits up to max*10 microseconds for the selected bits in the port's
1565 * status register to be cleared.
1566 * Returns final value of status register.
1567 *
1568 * LOCKING:
1569 * Inherited from caller.
1570 */
1571 static inline u8 ata_sff_busy_wait(struct ata_port *ap, unsigned int bits,
1572 unsigned int max)
1573 {
1574 u8 status;
1575
1576 do {
1577 udelay(10);
1578 status = ap->ops->sff_check_status(ap);
1579 max--;
1580 } while (status != 0xff && (status & bits) && (max > 0));
1581
1582 return status;
1583 }
1584
1585 /**
1586 * ata_wait_idle - Wait for a port to be idle.
1587 * @ap: Port to wait for.
1588 *
1589 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
1590 * Returns final value of status register.
1591 *
1592 * LOCKING:
1593 * Inherited from caller.
1594 */
1595 static inline u8 ata_wait_idle(struct ata_port *ap)
1596 {
1597 u8 status = ata_sff_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
1598
1599 #ifdef ATA_DEBUG
1600 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ)))
1601 ata_port_printk(ap, KERN_DEBUG, "abnormal Status 0x%X\n",
1602 status);
1603 #endif
1604
1605 return status;
1606 }
1607 #endif /* CONFIG_ATA_SFF */
1608
1609 #endif /* __LINUX_LIBATA_H__ */
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