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