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sched: add rt-overload tracking
[linux-2.6/verdex.git] / include / linux / libata.h
blob124033cb5e9bf6c6540a83f7b696852912d75913
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/interrupt.h>
31 #include <linux/dma-mapping.h>
32 #include <linux/scatterlist.h>
33 #include <linux/io.h>
34 #include <linux/ata.h>
35 #include <linux/workqueue.h>
36 #include <scsi/scsi_host.h>
37 #include <linux/acpi.h>
38
39 /*
40 * Define if arch has non-standard setup. This is a _PCI_ standard
41 * not a legacy or ISA standard.
42 */
43 #ifdef CONFIG_ATA_NONSTANDARD
44 #include <asm/libata-portmap.h>
45 #else
46 #include <asm-generic/libata-portmap.h>
47 #endif
48
49 /*
50 * compile-time options: to be removed as soon as all the drivers are
51 * converted to the new debugging mechanism
52 */
53 #undef ATA_DEBUG /* debugging output */
54 #undef ATA_VERBOSE_DEBUG /* yet more debugging output */
55 #undef ATA_IRQ_TRAP /* define to ack screaming irqs */
56 #undef ATA_NDEBUG /* define to disable quick runtime checks */
57
58
59 /* note: prints function name for you */
60 #ifdef ATA_DEBUG
61 #define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
62 #ifdef ATA_VERBOSE_DEBUG
63 #define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
64 #else
65 #define VPRINTK(fmt, args...)
66 #endif /* ATA_VERBOSE_DEBUG */
67 #else
68 #define DPRINTK(fmt, args...)
69 #define VPRINTK(fmt, args...)
70 #endif /* ATA_DEBUG */
71
72 #define BPRINTK(fmt, args...) if (ap->flags & ATA_FLAG_DEBUGMSG) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
73
74 /* NEW: debug levels */
75 #define HAVE_LIBATA_MSG 1
76
77 enum {
78 ATA_MSG_DRV = 0x0001,
79 ATA_MSG_INFO = 0x0002,
80 ATA_MSG_PROBE = 0x0004,
81 ATA_MSG_WARN = 0x0008,
82 ATA_MSG_MALLOC = 0x0010,
83 ATA_MSG_CTL = 0x0020,
84 ATA_MSG_INTR = 0x0040,
85 ATA_MSG_ERR = 0x0080,
86 };
87
88 #define ata_msg_drv(p) ((p)->msg_enable & ATA_MSG_DRV)
89 #define ata_msg_info(p) ((p)->msg_enable & ATA_MSG_INFO)
90 #define ata_msg_probe(p) ((p)->msg_enable & ATA_MSG_PROBE)
91 #define ata_msg_warn(p) ((p)->msg_enable & ATA_MSG_WARN)
92 #define ata_msg_malloc(p) ((p)->msg_enable & ATA_MSG_MALLOC)
93 #define ata_msg_ctl(p) ((p)->msg_enable & ATA_MSG_CTL)
94 #define ata_msg_intr(p) ((p)->msg_enable & ATA_MSG_INTR)
95 #define ata_msg_err(p) ((p)->msg_enable & ATA_MSG_ERR)
96
97 static inline u32 ata_msg_init(int dval, int default_msg_enable_bits)
98 {
99 if (dval < 0 || dval >= (sizeof(u32) * 8))
100 return default_msg_enable_bits; /* should be 0x1 - only driver info msgs */
101 if (!dval)
102 return 0;
103 return (1 << dval) - 1;
104 }
105
106 /* defines only for the constants which don't work well as enums */
107 #define ATA_TAG_POISON 0xfafbfcfdU
108
109 enum {
110 /* various global constants */
111 LIBATA_MAX_PRD = ATA_MAX_PRD / 2,
112 LIBATA_DUMB_MAX_PRD = ATA_MAX_PRD / 4, /* Worst case */
113 ATA_MAX_PORTS = 8,
114 ATA_DEF_QUEUE = 1,
115 /* tag ATA_MAX_QUEUE - 1 is reserved for internal commands */
116 ATA_MAX_QUEUE = 32,
117 ATA_TAG_INTERNAL = ATA_MAX_QUEUE - 1,
118 ATA_MAX_BUS = 2,
119 ATA_DEF_BUSY_WAIT = 10000,
120 ATA_SHORT_PAUSE = (HZ >> 6) + 1,
121
122 ATAPI_MAX_DRAIN = 16 << 10,
123
124 ATA_SHT_EMULATED = 1,
125 ATA_SHT_CMD_PER_LUN = 1,
126 ATA_SHT_THIS_ID = -1,
127 ATA_SHT_USE_CLUSTERING = 1,
128
129 /* struct ata_device stuff */
130 ATA_DFLAG_LBA = (1 << 0), /* device supports LBA */
131 ATA_DFLAG_LBA48 = (1 << 1), /* device supports LBA48 */
132 ATA_DFLAG_CDB_INTR = (1 << 2), /* device asserts INTRQ when ready for CDB */
133 ATA_DFLAG_NCQ = (1 << 3), /* device supports NCQ */
134 ATA_DFLAG_FLUSH_EXT = (1 << 4), /* do FLUSH_EXT instead of FLUSH */
135 ATA_DFLAG_ACPI_PENDING = (1 << 5), /* ACPI resume action pending */
136 ATA_DFLAG_ACPI_FAILED = (1 << 6), /* ACPI on devcfg has failed */
137 ATA_DFLAG_AN = (1 << 7), /* AN configured */
138 ATA_DFLAG_HIPM = (1 << 8), /* device supports HIPM */
139 ATA_DFLAG_DIPM = (1 << 9), /* device supports DIPM */
140 ATA_DFLAG_CFG_MASK = (1 << 12) - 1,
141
142 ATA_DFLAG_PIO = (1 << 12), /* device limited to PIO mode */
143 ATA_DFLAG_NCQ_OFF = (1 << 13), /* device limited to non-NCQ mode */
144 ATA_DFLAG_SPUNDOWN = (1 << 14), /* XXX: for spindown_compat */
145 ATA_DFLAG_SLEEPING = (1 << 15), /* device is sleeping */
146 ATA_DFLAG_INIT_MASK = (1 << 16) - 1,
147
148 ATA_DFLAG_DETACH = (1 << 16),
149 ATA_DFLAG_DETACHED = (1 << 17),
150
151 ATA_DEV_UNKNOWN = 0, /* unknown device */
152 ATA_DEV_ATA = 1, /* ATA device */
153 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */
154 ATA_DEV_ATAPI = 3, /* ATAPI device */
155 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */
156 ATA_DEV_PMP = 5, /* SATA port multiplier */
157 ATA_DEV_PMP_UNSUP = 6, /* SATA port multiplier (unsupported) */
158 ATA_DEV_SEMB = 7, /* SEMB */
159 ATA_DEV_SEMB_UNSUP = 8, /* SEMB (unsupported) */
160 ATA_DEV_NONE = 9, /* no device */
161
162 /* struct ata_link flags */
163 ATA_LFLAG_HRST_TO_RESUME = (1 << 0), /* hardreset to resume link */
164 ATA_LFLAG_SKIP_D2H_BSY = (1 << 1), /* can't wait for the first D2H
165 * Register FIS clearing BSY */
166 ATA_LFLAG_NO_SRST = (1 << 2), /* avoid softreset */
167 ATA_LFLAG_ASSUME_ATA = (1 << 3), /* assume ATA class */
168 ATA_LFLAG_ASSUME_SEMB = (1 << 4), /* assume SEMB class */
169 ATA_LFLAG_ASSUME_CLASS = ATA_LFLAG_ASSUME_ATA | ATA_LFLAG_ASSUME_SEMB,
170 ATA_LFLAG_NO_RETRY = (1 << 5), /* don't retry this link */
171 ATA_LFLAG_DISABLED = (1 << 6), /* link is disabled */
172
173 /* struct ata_port flags */
174 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */
175 /* (doesn't imply presence) */
176 ATA_FLAG_SATA = (1 << 1),
177 ATA_FLAG_NO_LEGACY = (1 << 2), /* no legacy mode check */
178 ATA_FLAG_MMIO = (1 << 3), /* use MMIO, not PIO */
179 ATA_FLAG_SRST = (1 << 4), /* (obsolete) use ATA SRST, not E.D.D. */
180 ATA_FLAG_SATA_RESET = (1 << 5), /* (obsolete) use COMRESET */
181 ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */
182 ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */
183 ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */
184 ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD
185 * doesn't handle PIO interrupts */
186 ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */
187 ATA_FLAG_DEBUGMSG = (1 << 13),
188 ATA_FLAG_IGN_SIMPLEX = (1 << 15), /* ignore SIMPLEX */
189 ATA_FLAG_NO_IORDY = (1 << 16), /* controller lacks iordy */
190 ATA_FLAG_ACPI_SATA = (1 << 17), /* need native SATA ACPI layout */
191 ATA_FLAG_AN = (1 << 18), /* controller supports AN */
192 ATA_FLAG_PMP = (1 << 19), /* controller supports PMP */
193 ATA_FLAG_IPM = (1 << 20), /* driver can handle IPM */
194
195 /* The following flag belongs to ap->pflags but is kept in
196 * ap->flags because it's referenced in many LLDs and will be
197 * removed in not-too-distant future.
198 */
199 ATA_FLAG_DISABLED = (1 << 23), /* port is disabled, ignore it */
200
201 /* bits 24:31 of ap->flags are reserved for LLD specific flags */
202
203 /* struct ata_port pflags */
204 ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */
205 ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */
206 ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */
207 ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */
208 ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */
209 ATA_PFLAG_UNLOADING = (1 << 5), /* module is unloading */
210 ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */
211 ATA_PFLAG_INITIALIZING = (1 << 7), /* being initialized, don't touch */
212 ATA_PFLAG_RESETTING = (1 << 8), /* reset in progress */
213
214 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */
215 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */
216 ATA_PFLAG_INIT_GTM_VALID = (1 << 19), /* initial gtm data valid */
217
218 /* struct ata_queued_cmd flags */
219 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */
220 ATA_QCFLAG_SG = (1 << 1), /* have s/g table? */
221 ATA_QCFLAG_SINGLE = (1 << 2), /* no s/g, just a single buffer */
222 ATA_QCFLAG_DMAMAP = ATA_QCFLAG_SG | ATA_QCFLAG_SINGLE,
223 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */
224 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */
225 ATA_QCFLAG_CLEAR_EXCL = (1 << 5), /* clear excl_link on completion */
226 ATA_QCFLAG_QUIET = (1 << 6), /* don't report device error */
227
228 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */
229 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */
230 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */
231
232 /* host set flags */
233 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */
234 ATA_HOST_STARTED = (1 << 1), /* Host started */
235
236 /* bits 24:31 of host->flags are reserved for LLD specific flags */
237
238 /* various lengths of time */
239 ATA_TMOUT_BOOT = 30 * HZ, /* heuristic */
240 ATA_TMOUT_BOOT_QUICK = 7 * HZ, /* heuristic */
241 ATA_TMOUT_INTERNAL = 30 * HZ,
242 ATA_TMOUT_INTERNAL_QUICK = 5 * HZ,
243
244 /* FIXME: GoVault needs 2s but we can't afford that without
245 * parallel probing. 800ms is enough for iVDR disk
246 * HHD424020F7SV00. Increase to 2secs when parallel probing
247 * is in place.
248 */
249 ATA_TMOUT_FF_WAIT = 4 * HZ / 5,
250
251 /* ATA bus states */
252 BUS_UNKNOWN = 0,
253 BUS_DMA = 1,
254 BUS_IDLE = 2,
255 BUS_NOINTR = 3,
256 BUS_NODATA = 4,
257 BUS_TIMER = 5,
258 BUS_PIO = 6,
259 BUS_EDD = 7,
260 BUS_IDENTIFY = 8,
261 BUS_PACKET = 9,
262
263 /* SATA port states */
264 PORT_UNKNOWN = 0,
265 PORT_ENABLED = 1,
266 PORT_DISABLED = 2,
267
268 /* encoding various smaller bitmaps into a single
269 * unsigned int bitmap
270 */
271 ATA_BITS_PIO = 7,
272 ATA_BITS_MWDMA = 5,
273 ATA_BITS_UDMA = 8,
274
275 ATA_SHIFT_PIO = 0,
276 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_BITS_PIO,
277 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_BITS_MWDMA,
278
279 ATA_MASK_PIO = ((1 << ATA_BITS_PIO) - 1) << ATA_SHIFT_PIO,
280 ATA_MASK_MWDMA = ((1 << ATA_BITS_MWDMA) - 1) << ATA_SHIFT_MWDMA,
281 ATA_MASK_UDMA = ((1 << ATA_BITS_UDMA) - 1) << ATA_SHIFT_UDMA,
282
283 /* size of buffer to pad xfers ending on unaligned boundaries */
284 ATA_DMA_PAD_SZ = 4,
285 ATA_DMA_PAD_BUF_SZ = ATA_DMA_PAD_SZ * ATA_MAX_QUEUE,
286
287 /* ering size */
288 ATA_ERING_SIZE = 32,
289
290 /* return values for ->qc_defer */
291 ATA_DEFER_LINK = 1,
292 ATA_DEFER_PORT = 2,
293
294 /* desc_len for ata_eh_info and context */
295 ATA_EH_DESC_LEN = 80,
296
297 /* reset / recovery action types */
298 ATA_EH_REVALIDATE = (1 << 0),
299 ATA_EH_SOFTRESET = (1 << 1),
300 ATA_EH_HARDRESET = (1 << 2),
301 ATA_EH_ENABLE_LINK = (1 << 3),
302
303 ATA_EH_RESET_MASK = ATA_EH_SOFTRESET | ATA_EH_HARDRESET,
304 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE,
305
306 /* ata_eh_info->flags */
307 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */
308 ATA_EHI_RESUME_LINK = (1 << 1), /* resume link (reset modifier) */
309 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */
310 ATA_EHI_QUIET = (1 << 3), /* be quiet */
311 ATA_EHI_LPM = (1 << 4), /* link power management action */
312
313 ATA_EHI_DID_SOFTRESET = (1 << 16), /* already soft-reset this port */
314 ATA_EHI_DID_HARDRESET = (1 << 17), /* already soft-reset this port */
315 ATA_EHI_PRINTINFO = (1 << 18), /* print configuration info */
316 ATA_EHI_SETMODE = (1 << 19), /* configure transfer mode */
317 ATA_EHI_POST_SETMODE = (1 << 20), /* revaildating after setmode */
318
319 ATA_EHI_DID_RESET = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET,
320 ATA_EHI_RESET_MODIFIER_MASK = ATA_EHI_RESUME_LINK,
321
322 /* max tries if error condition is still set after ->error_handler */
323 ATA_EH_MAX_TRIES = 5,
324
325 /* how hard are we gonna try to probe/recover devices */
326 ATA_PROBE_MAX_TRIES = 3,
327 ATA_EH_DEV_TRIES = 3,
328 ATA_EH_PMP_TRIES = 5,
329 ATA_EH_PMP_LINK_TRIES = 3,
330
331 SATA_PMP_SCR_TIMEOUT = 250,
332
333 /* Horkage types. May be set by libata or controller on drives
334 (some horkage may be drive/controller pair dependant */
335
336 ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */
337 ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */
338 ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */
339 ATA_HORKAGE_MAX_SEC_128 = (1 << 3), /* Limit max sects to 128 */
340 ATA_HORKAGE_BROKEN_HPA = (1 << 4), /* Broken HPA */
341 ATA_HORKAGE_SKIP_PM = (1 << 5), /* Skip PM operations */
342 ATA_HORKAGE_HPA_SIZE = (1 << 6), /* native size off by one */
343 ATA_HORKAGE_IPM = (1 << 7), /* Link PM problems */
344 ATA_HORKAGE_IVB = (1 << 8), /* cbl det validity bit bugs */
345 ATA_HORKAGE_STUCK_ERR = (1 << 9), /* stuck ERR on next PACKET */
346
347 /* DMA mask for user DMA control: User visible values; DO NOT
348 renumber */
349 ATA_DMA_MASK_ATA = (1 << 0), /* DMA on ATA Disk */
350 ATA_DMA_MASK_ATAPI = (1 << 1), /* DMA on ATAPI */
351 ATA_DMA_MASK_CFA = (1 << 2), /* DMA on CF Card */
352 };
353
354 enum hsm_task_states {
355 HSM_ST_IDLE, /* no command on going */
356 HSM_ST_FIRST, /* (waiting the device to)
357 write CDB or first data block */
358 HSM_ST, /* (waiting the device to) transfer data */
359 HSM_ST_LAST, /* (waiting the device to) complete command */
360 HSM_ST_ERR, /* error */
361 };
362
363 enum ata_completion_errors {
364 AC_ERR_DEV = (1 << 0), /* device reported error */
365 AC_ERR_HSM = (1 << 1), /* host state machine violation */
366 AC_ERR_TIMEOUT = (1 << 2), /* timeout */
367 AC_ERR_MEDIA = (1 << 3), /* media error */
368 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */
369 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */
370 AC_ERR_SYSTEM = (1 << 6), /* system error */
371 AC_ERR_INVALID = (1 << 7), /* invalid argument */
372 AC_ERR_OTHER = (1 << 8), /* unknown */
373 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */
374 AC_ERR_NCQ = (1 << 10), /* marker for offending NCQ qc */
375 };
376
377 /* forward declarations */
378 struct scsi_device;
379 struct ata_port_operations;
380 struct ata_port;
381 struct ata_link;
382 struct ata_queued_cmd;
383
384 /* typedefs */
385 typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
386 typedef int (*ata_prereset_fn_t)(struct ata_link *link, unsigned long deadline);
387 typedef int (*ata_reset_fn_t)(struct ata_link *link, unsigned int *classes,
388 unsigned long deadline);
389 typedef void (*ata_postreset_fn_t)(struct ata_link *link, unsigned int *classes);
390
391 /*
392 * host pm policy: If you alter this, you also need to alter libata-scsi.c
393 * (for the ascii descriptions)
394 */
395 enum link_pm {
396 NOT_AVAILABLE,
397 MIN_POWER,
398 MAX_PERFORMANCE,
399 MEDIUM_POWER,
400 };
401 extern struct class_device_attribute class_device_attr_link_power_management_policy;
402
403 struct ata_ioports {
404 void __iomem *cmd_addr;
405 void __iomem *data_addr;
406 void __iomem *error_addr;
407 void __iomem *feature_addr;
408 void __iomem *nsect_addr;
409 void __iomem *lbal_addr;
410 void __iomem *lbam_addr;
411 void __iomem *lbah_addr;
412 void __iomem *device_addr;
413 void __iomem *status_addr;
414 void __iomem *command_addr;
415 void __iomem *altstatus_addr;
416 void __iomem *ctl_addr;
417 void __iomem *bmdma_addr;
418 void __iomem *scr_addr;
419 };
420
421 struct ata_host {
422 spinlock_t lock;
423 struct device *dev;
424 void __iomem * const *iomap;
425 unsigned int n_ports;
426 void *private_data;
427 const struct ata_port_operations *ops;
428 unsigned long flags;
429 #ifdef CONFIG_ATA_ACPI
430 acpi_handle acpi_handle;
431 #endif
432 struct ata_port *simplex_claimed; /* channel owning the DMA */
433 struct ata_port *ports[0];
434 };
435
436 struct ata_queued_cmd {
437 struct ata_port *ap;
438 struct ata_device *dev;
439
440 struct scsi_cmnd *scsicmd;
441 void (*scsidone)(struct scsi_cmnd *);
442
443 struct ata_taskfile tf;
444 u8 cdb[ATAPI_CDB_LEN];
445
446 unsigned long flags; /* ATA_QCFLAG_xxx */
447 unsigned int tag;
448 unsigned int n_elem;
449 unsigned int n_iter;
450 unsigned int orig_n_elem;
451
452 int dma_dir;
453
454 unsigned int pad_len;
455 unsigned int sect_size;
456
457 unsigned int nbytes;
458 unsigned int curbytes;
459
460 struct scatterlist *cursg;
461 unsigned int cursg_ofs;
462
463 struct scatterlist sgent;
464 struct scatterlist pad_sgent;
465 void *buf_virt;
466
467 /* DO NOT iterate over __sg manually, use ata_for_each_sg() */
468 struct scatterlist *__sg;
469
470 unsigned int err_mask;
471 struct ata_taskfile result_tf;
472 ata_qc_cb_t complete_fn;
473
474 void *private_data;
475 void *lldd_task;
476 };
477
478 struct ata_port_stats {
479 unsigned long unhandled_irq;
480 unsigned long idle_irq;
481 unsigned long rw_reqbuf;
482 };
483
484 struct ata_ering_entry {
485 int is_io;
486 unsigned int err_mask;
487 u64 timestamp;
488 };
489
490 struct ata_ering {
491 int cursor;
492 struct ata_ering_entry ring[ATA_ERING_SIZE];
493 };
494
495 struct ata_device {
496 struct ata_link *link;
497 unsigned int devno; /* 0 or 1 */
498 unsigned long flags; /* ATA_DFLAG_xxx */
499 unsigned int horkage; /* List of broken features */
500 struct scsi_device *sdev; /* attached SCSI device */
501 #ifdef CONFIG_ATA_ACPI
502 acpi_handle acpi_handle;
503 union acpi_object *gtf_cache;
504 #endif
505 /* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */
506 u64 n_sectors; /* size of device, if ATA */
507 unsigned int class; /* ATA_DEV_xxx */
508
509 union {
510 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
511 u32 gscr[SATA_PMP_GSCR_DWORDS]; /* PMP GSCR block */
512 };
513
514 u8 pio_mode;
515 u8 dma_mode;
516 u8 xfer_mode;
517 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
518
519 unsigned int multi_count; /* sectors count for
520 READ/WRITE MULTIPLE */
521 unsigned int max_sectors; /* per-device max sectors */
522 unsigned int cdb_len;
523
524 /* per-dev xfer mask */
525 unsigned int pio_mask;
526 unsigned int mwdma_mask;
527 unsigned int udma_mask;
528
529 /* for CHS addressing */
530 u16 cylinders; /* Number of cylinders */
531 u16 heads; /* Number of heads */
532 u16 sectors; /* Number of sectors per track */
533
534 /* error history */
535 struct ata_ering ering;
536 int spdn_cnt;
537 };
538
539 /* Offset into struct ata_device. Fields above it are maintained
540 * acress device init. Fields below are zeroed.
541 */
542 #define ATA_DEVICE_CLEAR_OFFSET offsetof(struct ata_device, n_sectors)
543
544 struct ata_eh_info {
545 struct ata_device *dev; /* offending device */
546 u32 serror; /* SError from LLDD */
547 unsigned int err_mask; /* port-wide err_mask */
548 unsigned int action; /* ATA_EH_* action mask */
549 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */
550 unsigned int flags; /* ATA_EHI_* flags */
551
552 unsigned int probe_mask;
553
554 char desc[ATA_EH_DESC_LEN];
555 int desc_len;
556 };
557
558 struct ata_eh_context {
559 struct ata_eh_info i;
560 int tries[ATA_MAX_DEVICES];
561 unsigned int classes[ATA_MAX_DEVICES];
562 unsigned int did_probe_mask;
563 };
564
565 struct ata_acpi_drive
566 {
567 u32 pio;
568 u32 dma;
569 } __packed;
570
571 struct ata_acpi_gtm {
572 struct ata_acpi_drive drive[2];
573 u32 flags;
574 } __packed;
575
576 struct ata_link {
577 struct ata_port *ap;
578 int pmp; /* port multiplier port # */
579
580 unsigned int active_tag; /* active tag on this link */
581 u32 sactive; /* active NCQ commands */
582
583 unsigned int flags; /* ATA_LFLAG_xxx */
584
585 unsigned int hw_sata_spd_limit;
586 unsigned int sata_spd_limit;
587 unsigned int sata_spd; /* current SATA PHY speed */
588
589 /* record runtime error info, protected by host_set lock */
590 struct ata_eh_info eh_info;
591 /* EH context */
592 struct ata_eh_context eh_context;
593
594 struct ata_device device[ATA_MAX_DEVICES];
595 };
596
597 struct ata_port {
598 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */
599 const struct ata_port_operations *ops;
600 spinlock_t *lock;
601 unsigned long flags; /* ATA_FLAG_xxx */
602 unsigned int pflags; /* ATA_PFLAG_xxx */
603 unsigned int print_id; /* user visible unique port ID */
604 unsigned int port_no; /* 0 based port no. inside the host */
605
606 struct ata_prd *prd; /* our SG list */
607 dma_addr_t prd_dma; /* and its DMA mapping */
608
609 void *pad; /* array of DMA pad buffers */
610 dma_addr_t pad_dma;
611
612 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
613
614 u8 ctl; /* cache of ATA control register */
615 u8 last_ctl; /* Cache last written value */
616 unsigned int pio_mask;
617 unsigned int mwdma_mask;
618 unsigned int udma_mask;
619 unsigned int cbl; /* cable type; ATA_CBL_xxx */
620
621 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
622 unsigned long qc_allocated;
623 unsigned int qc_active;
624 int nr_active_links; /* #links with active qcs */
625
626 struct ata_link link; /* host default link */
627
628 int nr_pmp_links; /* nr of available PMP links */
629 struct ata_link *pmp_link; /* array of PMP links */
630 struct ata_link *excl_link; /* for PMP qc exclusion */
631
632 struct ata_port_stats stats;
633 struct ata_host *host;
634 struct device *dev;
635
636 void *port_task_data;
637 struct delayed_work port_task;
638 struct delayed_work hotplug_task;
639 struct work_struct scsi_rescan_task;
640
641 unsigned int hsm_task_state;
642
643 u32 msg_enable;
644 struct list_head eh_done_q;
645 wait_queue_head_t eh_wait_q;
646 int eh_tries;
647
648 pm_message_t pm_mesg;
649 int *pm_result;
650 enum link_pm pm_policy;
651
652 struct timer_list fastdrain_timer;
653 unsigned long fastdrain_cnt;
654
655 void *private_data;
656
657 #ifdef CONFIG_ATA_ACPI
658 acpi_handle acpi_handle;
659 struct ata_acpi_gtm __acpi_init_gtm; /* use ata_acpi_init_gtm() */
660 #endif
661 u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */
662 };
663
664 struct ata_port_operations {
665 void (*dev_config) (struct ata_device *);
666
667 void (*set_piomode) (struct ata_port *, struct ata_device *);
668 void (*set_dmamode) (struct ata_port *, struct ata_device *);
669 unsigned long (*mode_filter) (struct ata_device *, unsigned long);
670
671 void (*tf_load) (struct ata_port *ap, const struct ata_taskfile *tf);
672 void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf);
673
674 void (*exec_command)(struct ata_port *ap, const struct ata_taskfile *tf);
675 u8 (*check_status)(struct ata_port *ap);
676 u8 (*check_altstatus)(struct ata_port *ap);
677 void (*dev_select)(struct ata_port *ap, unsigned int device);
678
679 void (*phy_reset) (struct ata_port *ap); /* obsolete */
680 int (*set_mode) (struct ata_link *link, struct ata_device **r_failed_dev);
681
682 int (*cable_detect) (struct ata_port *ap);
683
684 int (*check_atapi_dma) (struct ata_queued_cmd *qc);
685
686 void (*bmdma_setup) (struct ata_queued_cmd *qc);
687 void (*bmdma_start) (struct ata_queued_cmd *qc);
688
689 void (*data_xfer) (struct ata_device *, unsigned char *, unsigned int, int);
690
691 int (*qc_defer) (struct ata_queued_cmd *qc);
692 void (*qc_prep) (struct ata_queued_cmd *qc);
693 unsigned int (*qc_issue) (struct ata_queued_cmd *qc);
694
695 /* port multiplier */
696 void (*pmp_attach) (struct ata_port *ap);
697 void (*pmp_detach) (struct ata_port *ap);
698
699 /* Error handlers. ->error_handler overrides ->eng_timeout and
700 * indicates that new-style EH is in place.
701 */
702 void (*eng_timeout) (struct ata_port *ap); /* obsolete */
703
704 void (*freeze) (struct ata_port *ap);
705 void (*thaw) (struct ata_port *ap);
706 void (*error_handler) (struct ata_port *ap);
707 void (*post_internal_cmd) (struct ata_queued_cmd *qc);
708
709 irq_handler_t irq_handler;
710 void (*irq_clear) (struct ata_port *);
711 u8 (*irq_on) (struct ata_port *);
712
713 int (*scr_read) (struct ata_port *ap, unsigned int sc_reg, u32 *val);
714 int (*scr_write) (struct ata_port *ap, unsigned int sc_reg, u32 val);
715
716 int (*port_suspend) (struct ata_port *ap, pm_message_t mesg);
717 int (*port_resume) (struct ata_port *ap);
718 int (*enable_pm) (struct ata_port *ap, enum link_pm policy);
719 void (*disable_pm) (struct ata_port *ap);
720 int (*port_start) (struct ata_port *ap);
721 void (*port_stop) (struct ata_port *ap);
722
723 void (*host_stop) (struct ata_host *host);
724
725 void (*bmdma_stop) (struct ata_queued_cmd *qc);
726 u8 (*bmdma_status) (struct ata_port *ap);
727 };
728
729 struct ata_port_info {
730 struct scsi_host_template *sht;
731 unsigned long flags;
732 unsigned long link_flags;
733 unsigned long pio_mask;
734 unsigned long mwdma_mask;
735 unsigned long udma_mask;
736 const struct ata_port_operations *port_ops;
737 irq_handler_t irq_handler;
738 void *private_data;
739 };
740
741 struct ata_timing {
742 unsigned short mode; /* ATA mode */
743 unsigned short setup; /* t1 */
744 unsigned short act8b; /* t2 for 8-bit I/O */
745 unsigned short rec8b; /* t2i for 8-bit I/O */
746 unsigned short cyc8b; /* t0 for 8-bit I/O */
747 unsigned short active; /* t2 or tD */
748 unsigned short recover; /* t2i or tK */
749 unsigned short cycle; /* t0 */
750 unsigned short udma; /* t2CYCTYP/2 */
751 };
752
753 #define FIT(v, vmin, vmax) max_t(short, min_t(short, v, vmax), vmin)
754
755 extern const unsigned long sata_deb_timing_normal[];
756 extern const unsigned long sata_deb_timing_hotplug[];
757 extern const unsigned long sata_deb_timing_long[];
758
759 extern const struct ata_port_operations ata_dummy_port_ops;
760 extern const struct ata_port_info ata_dummy_port_info;
761
762 static inline const unsigned long *
763 sata_ehc_deb_timing(struct ata_eh_context *ehc)
764 {
765 if (ehc->i.flags & ATA_EHI_HOTPLUGGED)
766 return sata_deb_timing_hotplug;
767 else
768 return sata_deb_timing_normal;
769 }
770
771 static inline int ata_port_is_dummy(struct ata_port *ap)
772 {
773 return ap->ops == &ata_dummy_port_ops;
774 }
775
776 extern void sata_print_link_status(struct ata_link *link);
777 extern void ata_port_probe(struct ata_port *);
778 extern void ata_bus_reset(struct ata_port *ap);
779 extern int sata_set_spd(struct ata_link *link);
780 extern int sata_link_debounce(struct ata_link *link,
781 const unsigned long *params, unsigned long deadline);
782 extern int sata_link_resume(struct ata_link *link, const unsigned long *params,
783 unsigned long deadline);
784 extern int ata_std_prereset(struct ata_link *link, unsigned long deadline);
785 extern int ata_std_softreset(struct ata_link *link, unsigned int *classes,
786 unsigned long deadline);
787 extern int sata_link_hardreset(struct ata_link *link,
788 const unsigned long *timing, unsigned long deadline);
789 extern int sata_std_hardreset(struct ata_link *link, unsigned int *class,
790 unsigned long deadline);
791 extern void ata_std_postreset(struct ata_link *link, unsigned int *classes);
792 extern void ata_port_disable(struct ata_port *);
793 extern void ata_std_ports(struct ata_ioports *ioaddr);
794
795 extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports);
796 extern struct ata_host *ata_host_alloc_pinfo(struct device *dev,
797 const struct ata_port_info * const * ppi, int n_ports);
798 extern int ata_host_start(struct ata_host *host);
799 extern int ata_host_register(struct ata_host *host,
800 struct scsi_host_template *sht);
801 extern int ata_host_activate(struct ata_host *host, int irq,
802 irq_handler_t irq_handler, unsigned long irq_flags,
803 struct scsi_host_template *sht);
804 extern void ata_host_detach(struct ata_host *host);
805 extern void ata_host_init(struct ata_host *, struct device *,
806 unsigned long, const struct ata_port_operations *);
807 extern int ata_scsi_detect(struct scsi_host_template *sht);
808 extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
809 extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *));
810 extern void ata_sas_port_destroy(struct ata_port *);
811 extern struct ata_port *ata_sas_port_alloc(struct ata_host *,
812 struct ata_port_info *, struct Scsi_Host *);
813 extern int ata_sas_port_init(struct ata_port *);
814 extern int ata_sas_port_start(struct ata_port *ap);
815 extern void ata_sas_port_stop(struct ata_port *ap);
816 extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *);
817 extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
818 struct ata_port *ap);
819 extern unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc);
820 extern int sata_scr_valid(struct ata_link *link);
821 extern int sata_scr_read(struct ata_link *link, int reg, u32 *val);
822 extern int sata_scr_write(struct ata_link *link, int reg, u32 val);
823 extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val);
824 extern int ata_link_online(struct ata_link *link);
825 extern int ata_link_offline(struct ata_link *link);
826 #ifdef CONFIG_PM
827 extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg);
828 extern void ata_host_resume(struct ata_host *host);
829 #endif
830 extern int ata_ratelimit(void);
831 extern int ata_busy_sleep(struct ata_port *ap,
832 unsigned long timeout_pat, unsigned long timeout);
833 extern void ata_wait_after_reset(struct ata_port *ap, unsigned long deadline);
834 extern int ata_wait_ready(struct ata_port *ap, unsigned long deadline);
835 extern void ata_port_queue_task(struct ata_port *ap, work_func_t fn,
836 void *data, unsigned long delay);
837 extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
838 unsigned long interval_msec,
839 unsigned long timeout_msec);
840 extern unsigned int ata_dev_try_classify(struct ata_device *dev, int present,
841 u8 *r_err);
842
843 /*
844 * Default driver ops implementations
845 */
846 extern void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
847 extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
848 extern void ata_tf_to_fis(const struct ata_taskfile *tf,
849 u8 pmp, int is_cmd, u8 *fis);
850 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
851 extern void ata_noop_dev_select(struct ata_port *ap, unsigned int device);
852 extern void ata_std_dev_select(struct ata_port *ap, unsigned int device);
853 extern u8 ata_check_status(struct ata_port *ap);
854 extern u8 ata_altstatus(struct ata_port *ap);
855 extern void ata_exec_command(struct ata_port *ap, const struct ata_taskfile *tf);
856 extern int ata_port_start(struct ata_port *ap);
857 extern int ata_sff_port_start(struct ata_port *ap);
858 extern irqreturn_t ata_interrupt(int irq, void *dev_instance);
859 extern void ata_data_xfer(struct ata_device *adev, unsigned char *buf,
860 unsigned int buflen, int write_data);
861 extern void ata_data_xfer_noirq(struct ata_device *adev, unsigned char *buf,
862 unsigned int buflen, int write_data);
863 extern int ata_std_qc_defer(struct ata_queued_cmd *qc);
864 extern void ata_dumb_qc_prep(struct ata_queued_cmd *qc);
865 extern void ata_qc_prep(struct ata_queued_cmd *qc);
866 extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
867 extern unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc);
868 extern void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf,
869 unsigned int buflen);
870 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
871 unsigned int n_elem);
872 extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
873 extern void ata_dev_disable(struct ata_device *adev);
874 extern void ata_id_string(const u16 *id, unsigned char *s,
875 unsigned int ofs, unsigned int len);
876 extern void ata_id_c_string(const u16 *id, unsigned char *s,
877 unsigned int ofs, unsigned int len);
878 extern void ata_id_to_dma_mode(struct ata_device *dev, u8 unknown);
879 extern void ata_bmdma_setup(struct ata_queued_cmd *qc);
880 extern void ata_bmdma_start(struct ata_queued_cmd *qc);
881 extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
882 extern u8 ata_bmdma_status(struct ata_port *ap);
883 extern void ata_bmdma_irq_clear(struct ata_port *ap);
884 extern void ata_bmdma_freeze(struct ata_port *ap);
885 extern void ata_bmdma_thaw(struct ata_port *ap);
886 extern void ata_bmdma_drive_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
887 ata_reset_fn_t softreset,
888 ata_reset_fn_t hardreset,
889 ata_postreset_fn_t postreset);
890 extern void ata_bmdma_error_handler(struct ata_port *ap);
891 extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc);
892 extern int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
893 u8 status, int in_wq);
894 extern void ata_qc_complete(struct ata_queued_cmd *qc);
895 extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active,
896 void (*finish_qc)(struct ata_queued_cmd *));
897 extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
898 void (*done)(struct scsi_cmnd *));
899 extern int ata_std_bios_param(struct scsi_device *sdev,
900 struct block_device *bdev,
901 sector_t capacity, int geom[]);
902 extern int ata_scsi_slave_config(struct scsi_device *sdev);
903 extern void ata_scsi_slave_destroy(struct scsi_device *sdev);
904 extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
905 int queue_depth);
906 extern struct ata_device *ata_dev_pair(struct ata_device *adev);
907 extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev);
908 extern u8 ata_irq_on(struct ata_port *ap);
909
910 extern int ata_cable_40wire(struct ata_port *ap);
911 extern int ata_cable_80wire(struct ata_port *ap);
912 extern int ata_cable_sata(struct ata_port *ap);
913 extern int ata_cable_unknown(struct ata_port *ap);
914
915 /*
916 * Timing helpers
917 */
918
919 extern unsigned int ata_pio_need_iordy(const struct ata_device *);
920 extern int ata_timing_compute(struct ata_device *, unsigned short,
921 struct ata_timing *, int, int);
922 extern void ata_timing_merge(const struct ata_timing *,
923 const struct ata_timing *, struct ata_timing *,
924 unsigned int);
925
926 enum {
927 ATA_TIMING_SETUP = (1 << 0),
928 ATA_TIMING_ACT8B = (1 << 1),
929 ATA_TIMING_REC8B = (1 << 2),
930 ATA_TIMING_CYC8B = (1 << 3),
931 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
932 ATA_TIMING_CYC8B,
933 ATA_TIMING_ACTIVE = (1 << 4),
934 ATA_TIMING_RECOVER = (1 << 5),
935 ATA_TIMING_CYCLE = (1 << 6),
936 ATA_TIMING_UDMA = (1 << 7),
937 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
938 ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
939 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
940 ATA_TIMING_CYCLE | ATA_TIMING_UDMA,
941 };
942
943 /* libata-acpi.c */
944 #ifdef CONFIG_ATA_ACPI
945 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
946 {
947 if (ap->pflags & ATA_PFLAG_INIT_GTM_VALID)
948 return &ap->__acpi_init_gtm;
949 return NULL;
950 }
951 extern int ata_acpi_cbl_80wire(struct ata_port *ap);
952 int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm);
953 int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *stm);
954 #else
955 static inline const struct ata_acpi_gtm *ata_acpi_init_gtm(struct ata_port *ap)
956 {
957 return NULL;
958 }
959 static inline int ata_acpi_cbl_80wire(struct ata_port *ap) { return 0; }
960 #endif
961
962 #ifdef CONFIG_PCI
963 struct pci_dev;
964
965 extern int ata_pci_init_one(struct pci_dev *pdev,
966 const struct ata_port_info * const * ppi);
967 extern void ata_pci_remove_one(struct pci_dev *pdev);
968 #ifdef CONFIG_PM
969 extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg);
970 extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev);
971 extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
972 extern int ata_pci_device_resume(struct pci_dev *pdev);
973 #endif
974 extern int ata_pci_clear_simplex(struct pci_dev *pdev);
975
976 struct pci_bits {
977 unsigned int reg; /* PCI config register to read */
978 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
979 unsigned long mask;
980 unsigned long val;
981 };
982
983 extern int ata_pci_init_sff_host(struct ata_host *host);
984 extern int ata_pci_init_bmdma(struct ata_host *host);
985 extern int ata_pci_prepare_sff_host(struct pci_dev *pdev,
986 const struct ata_port_info * const * ppi,
987 struct ata_host **r_host);
988 extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
989 extern unsigned long ata_pci_default_filter(struct ata_device *, unsigned long);
990 #endif /* CONFIG_PCI */
991
992 /*
993 * PMP
994 */
995 extern int sata_pmp_qc_defer_cmd_switch(struct ata_queued_cmd *qc);
996 extern int sata_pmp_std_prereset(struct ata_link *link, unsigned long deadline);
997 extern int sata_pmp_std_hardreset(struct ata_link *link, unsigned int *class,
998 unsigned long deadline);
999 extern void sata_pmp_std_postreset(struct ata_link *link, unsigned int *class);
1000 extern void sata_pmp_do_eh(struct ata_port *ap,
1001 ata_prereset_fn_t prereset, ata_reset_fn_t softreset,
1002 ata_reset_fn_t hardreset, ata_postreset_fn_t postreset,
1003 ata_prereset_fn_t pmp_prereset, ata_reset_fn_t pmp_softreset,
1004 ata_reset_fn_t pmp_hardreset, ata_postreset_fn_t pmp_postreset);
1005
1006 /*
1007 * EH
1008 */
1009 extern void ata_port_schedule_eh(struct ata_port *ap);
1010 extern int ata_link_abort(struct ata_link *link);
1011 extern int ata_port_abort(struct ata_port *ap);
1012 extern int ata_port_freeze(struct ata_port *ap);
1013 extern int sata_async_notification(struct ata_port *ap);
1014
1015 extern void ata_eh_freeze_port(struct ata_port *ap);
1016 extern void ata_eh_thaw_port(struct ata_port *ap);
1017
1018 extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
1019 extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
1020
1021 extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
1022 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
1023 ata_postreset_fn_t postreset);
1024
1025 /*
1026 * printk helpers
1027 */
1028 #define ata_port_printk(ap, lv, fmt, args...) \
1029 printk("%sata%u: "fmt, lv, (ap)->print_id , ##args)
1030
1031 #define ata_link_printk(link, lv, fmt, args...) do { \
1032 if ((link)->ap->nr_pmp_links) \
1033 printk("%sata%u.%02u: "fmt, lv, (link)->ap->print_id, \
1034 (link)->pmp , ##args); \
1035 else \
1036 printk("%sata%u: "fmt, lv, (link)->ap->print_id , ##args); \
1037 } while(0)
1038
1039 #define ata_dev_printk(dev, lv, fmt, args...) \
1040 printk("%sata%u.%02u: "fmt, lv, (dev)->link->ap->print_id, \
1041 (dev)->link->pmp + (dev)->devno , ##args)
1042
1043 /*
1044 * ata_eh_info helpers
1045 */
1046 extern void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...)
1047 __attribute__ ((format (printf, 2, 3)));
1048 extern void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...)
1049 __attribute__ ((format (printf, 2, 3)));
1050 extern void ata_ehi_clear_desc(struct ata_eh_info *ehi);
1051
1052 static inline void ata_ehi_schedule_probe(struct ata_eh_info *ehi)
1053 {
1054 ehi->flags |= ATA_EHI_RESUME_LINK;
1055 ehi->action |= ATA_EH_SOFTRESET;
1056 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
1057 }
1058
1059 static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
1060 {
1061 ata_ehi_schedule_probe(ehi);
1062 ehi->flags |= ATA_EHI_HOTPLUGGED;
1063 ehi->action |= ATA_EH_ENABLE_LINK;
1064 ehi->err_mask |= AC_ERR_ATA_BUS;
1065 }
1066
1067 /*
1068 * port description helpers
1069 */
1070 extern void ata_port_desc(struct ata_port *ap, const char *fmt, ...)
1071 __attribute__ ((format (printf, 2, 3)));
1072 #ifdef CONFIG_PCI
1073 extern void ata_port_pbar_desc(struct ata_port *ap, int bar, ssize_t offset,
1074 const char *name);
1075 #endif
1076
1077 /*
1078 * qc helpers
1079 */
1080 static inline struct scatterlist *
1081 ata_qc_first_sg(struct ata_queued_cmd *qc)
1082 {
1083 qc->n_iter = 0;
1084 if (qc->n_elem)
1085 return qc->__sg;
1086 if (qc->pad_len)
1087 return &qc->pad_sgent;
1088 return NULL;
1089 }
1090
1091 static inline struct scatterlist *
1092 ata_qc_next_sg(struct scatterlist *sg, struct ata_queued_cmd *qc)
1093 {
1094 if (sg == &qc->pad_sgent)
1095 return NULL;
1096 if (++qc->n_iter < qc->n_elem)
1097 return sg_next(sg);
1098 if (qc->pad_len)
1099 return &qc->pad_sgent;
1100 return NULL;
1101 }
1102
1103 #define ata_for_each_sg(sg, qc) \
1104 for (sg = ata_qc_first_sg(qc); sg; sg = ata_qc_next_sg(sg, qc))
1105
1106 static inline unsigned int ata_tag_valid(unsigned int tag)
1107 {
1108 return (tag < ATA_MAX_QUEUE) ? 1 : 0;
1109 }
1110
1111 static inline unsigned int ata_tag_internal(unsigned int tag)
1112 {
1113 return tag == ATA_MAX_QUEUE - 1;
1114 }
1115
1116 /*
1117 * device helpers
1118 */
1119 static inline unsigned int ata_class_enabled(unsigned int class)
1120 {
1121 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI ||
1122 class == ATA_DEV_PMP || class == ATA_DEV_SEMB;
1123 }
1124
1125 static inline unsigned int ata_class_disabled(unsigned int class)
1126 {
1127 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP ||
1128 class == ATA_DEV_PMP_UNSUP || class == ATA_DEV_SEMB_UNSUP;
1129 }
1130
1131 static inline unsigned int ata_class_absent(unsigned int class)
1132 {
1133 return !ata_class_enabled(class) && !ata_class_disabled(class);
1134 }
1135
1136 static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
1137 {
1138 return ata_class_enabled(dev->class);
1139 }
1140
1141 static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
1142 {
1143 return ata_class_disabled(dev->class);
1144 }
1145
1146 static inline unsigned int ata_dev_absent(const struct ata_device *dev)
1147 {
1148 return ata_class_absent(dev->class);
1149 }
1150
1151 /*
1152 * link helpers
1153 */
1154 static inline int ata_is_host_link(const struct ata_link *link)
1155 {
1156 return link == &link->ap->link;
1157 }
1158
1159 static inline int ata_link_max_devices(const struct ata_link *link)
1160 {
1161 if (ata_is_host_link(link) && link->ap->flags & ATA_FLAG_SLAVE_POSS)
1162 return 2;
1163 return 1;
1164 }
1165
1166 static inline int ata_link_active(struct ata_link *link)
1167 {
1168 return ata_tag_valid(link->active_tag) || link->sactive;
1169 }
1170
1171 static inline struct ata_link *ata_port_first_link(struct ata_port *ap)
1172 {
1173 if (ap->nr_pmp_links)
1174 return ap->pmp_link;
1175 return &ap->link;
1176 }
1177
1178 static inline struct ata_link *ata_port_next_link(struct ata_link *link)
1179 {
1180 struct ata_port *ap = link->ap;
1181
1182 if (link == &ap->link) {
1183 if (!ap->nr_pmp_links)
1184 return NULL;
1185 return ap->pmp_link;
1186 }
1187
1188 if (++link - ap->pmp_link < ap->nr_pmp_links)
1189 return link;
1190 return NULL;
1191 }
1192
1193 #define __ata_port_for_each_link(lk, ap) \
1194 for ((lk) = &(ap)->link; (lk); (lk) = ata_port_next_link(lk))
1195
1196 #define ata_port_for_each_link(link, ap) \
1197 for ((link) = ata_port_first_link(ap); (link); \
1198 (link) = ata_port_next_link(link))
1199
1200 #define ata_link_for_each_dev(dev, link) \
1201 for ((dev) = (link)->device; \
1202 (dev) < (link)->device + ata_link_max_devices(link) || ((dev) = NULL); \
1203 (dev)++)
1204
1205 #define ata_link_for_each_dev_reverse(dev, link) \
1206 for ((dev) = (link)->device + ata_link_max_devices(link) - 1; \
1207 (dev) >= (link)->device || ((dev) = NULL); (dev)--)
1208
1209 static inline u8 ata_chk_status(struct ata_port *ap)
1210 {
1211 return ap->ops->check_status(ap);
1212 }
1213
1214 /**
1215 * ata_ncq_enabled - Test whether NCQ is enabled
1216 * @dev: ATA device to test for
1217 *
1218 * LOCKING:
1219 * spin_lock_irqsave(host lock)
1220 *
1221 * RETURNS:
1222 * 1 if NCQ is enabled for @dev, 0 otherwise.
1223 */
1224 static inline int ata_ncq_enabled(struct ata_device *dev)
1225 {
1226 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF |
1227 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ;
1228 }
1229
1230 /**
1231 * ata_pause - Flush writes and pause 400 nanoseconds.
1232 * @ap: Port to wait for.
1233 *
1234 * LOCKING:
1235 * Inherited from caller.
1236 */
1237
1238 static inline void ata_pause(struct ata_port *ap)
1239 {
1240 ata_altstatus(ap);
1241 ndelay(400);
1242 }
1243
1244
1245 /**
1246 * ata_busy_wait - Wait for a port status register
1247 * @ap: Port to wait for.
1248 * @bits: bits that must be clear
1249 * @max: number of 10uS waits to perform
1250 *
1251 * Waits up to max*10 microseconds for the selected bits in the port's
1252 * status register to be cleared.
1253 * Returns final value of status register.
1254 *
1255 * LOCKING:
1256 * Inherited from caller.
1257 */
1258
1259 static inline u8 ata_busy_wait(struct ata_port *ap, unsigned int bits,
1260 unsigned int max)
1261 {
1262 u8 status;
1263
1264 do {
1265 udelay(10);
1266 status = ata_chk_status(ap);
1267 max--;
1268 } while (status != 0xff && (status & bits) && (max > 0));
1269
1270 return status;
1271 }
1272
1273
1274 /**
1275 * ata_wait_idle - Wait for a port to be idle.
1276 * @ap: Port to wait for.
1277 *
1278 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
1279 * Returns final value of status register.
1280 *
1281 * LOCKING:
1282 * Inherited from caller.
1283 */
1284
1285 static inline u8 ata_wait_idle(struct ata_port *ap)
1286 {
1287 u8 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
1288
1289 #ifdef ATA_DEBUG
1290 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ)))
1291 ata_port_printk(ap, KERN_DEBUG, "abnormal Status 0x%X\n",
1292 status);
1293 #endif
1294
1295 return status;
1296 }
1297
1298 static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
1299 {
1300 qc->tf.ctl |= ATA_NIEN;
1301 }
1302
1303 static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap,
1304 unsigned int tag)
1305 {
1306 if (likely(ata_tag_valid(tag)))
1307 return &ap->qcmd[tag];
1308 return NULL;
1309 }
1310
1311 static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap,
1312 unsigned int tag)
1313 {
1314 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
1315
1316 if (unlikely(!qc) || !ap->ops->error_handler)
1317 return qc;
1318
1319 if ((qc->flags & (ATA_QCFLAG_ACTIVE |
1320 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE)
1321 return qc;
1322
1323 return NULL;
1324 }
1325
1326 static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
1327 {
1328 memset(tf, 0, sizeof(*tf));
1329
1330 tf->ctl = dev->link->ap->ctl;
1331 if (dev->devno == 0)
1332 tf->device = ATA_DEVICE_OBS;
1333 else
1334 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
1335 }
1336
1337 static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
1338 {
1339 qc->dma_dir = DMA_NONE;
1340 qc->__sg = NULL;
1341 qc->flags = 0;
1342 qc->cursg = NULL;
1343 qc->cursg_ofs = 0;
1344 qc->nbytes = qc->curbytes = 0;
1345 qc->n_elem = 0;
1346 qc->n_iter = 0;
1347 qc->err_mask = 0;
1348 qc->pad_len = 0;
1349 qc->sect_size = ATA_SECT_SIZE;
1350
1351 ata_tf_init(qc->dev, &qc->tf);
1352
1353 /* init result_tf such that it indicates normal completion */
1354 qc->result_tf.command = ATA_DRDY;
1355 qc->result_tf.feature = 0;
1356 }
1357
1358 static inline int ata_try_flush_cache(const struct ata_device *dev)
1359 {
1360 return ata_id_wcache_enabled(dev->id) ||
1361 ata_id_has_flush(dev->id) ||
1362 ata_id_has_flush_ext(dev->id);
1363 }
1364
1365 static inline unsigned int ac_err_mask(u8 status)
1366 {
1367 if (status & (ATA_BUSY | ATA_DRQ))
1368 return AC_ERR_HSM;
1369 if (status & (ATA_ERR | ATA_DF))
1370 return AC_ERR_DEV;
1371 return 0;
1372 }
1373
1374 static inline unsigned int __ac_err_mask(u8 status)
1375 {
1376 unsigned int mask = ac_err_mask(status);
1377 if (mask == 0)
1378 return AC_ERR_OTHER;
1379 return mask;
1380 }
1381
1382 static inline int ata_pad_alloc(struct ata_port *ap, struct device *dev)
1383 {
1384 ap->pad_dma = 0;
1385 ap->pad = dmam_alloc_coherent(dev, ATA_DMA_PAD_BUF_SZ,
1386 &ap->pad_dma, GFP_KERNEL);
1387 return (ap->pad == NULL) ? -ENOMEM : 0;
1388 }
1389
1390 static inline void ata_pad_free(struct ata_port *ap, struct device *dev)
1391 {
1392 dmam_free_coherent(dev, ATA_DMA_PAD_BUF_SZ, ap->pad, ap->pad_dma);
1393 }
1394
1395 static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
1396 {
1397 return *(struct ata_port **)&host->hostdata[0];
1398 }
1399
1400 #endif /* __LINUX_LIBATA_H__ */
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