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libata-link: linkify config/EH related functions
[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/pci.h>
32 #include <linux/dma-mapping.h>
33 #include <asm/scatterlist.h>
34 #include <linux/io.h>
35 #include <linux/ata.h>
36 #include <linux/workqueue.h>
37 #include <scsi/scsi_host.h>
38 #include <linux/acpi.h>
39
40 /*
41 * Define if arch has non-standard setup. This is a _PCI_ standard
42 * not a legacy or ISA standard.
43 */
44 #ifdef CONFIG_ATA_NONSTANDARD
45 #include <asm/libata-portmap.h>
46 #else
47 #include <asm-generic/libata-portmap.h>
48 #endif
49
50 /*
51 * compile-time options: to be removed as soon as all the drivers are
52 * converted to the new debugging mechanism
53 */
54 #undef ATA_DEBUG /* debugging output */
55 #undef ATA_VERBOSE_DEBUG /* yet more debugging output */
56 #undef ATA_IRQ_TRAP /* define to ack screaming irqs */
57 #undef ATA_NDEBUG /* define to disable quick runtime checks */
58
59
60 /* note: prints function name for you */
61 #ifdef ATA_DEBUG
62 #define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
63 #ifdef ATA_VERBOSE_DEBUG
64 #define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
65 #else
66 #define VPRINTK(fmt, args...)
67 #endif /* ATA_VERBOSE_DEBUG */
68 #else
69 #define DPRINTK(fmt, args...)
70 #define VPRINTK(fmt, args...)
71 #endif /* ATA_DEBUG */
72
73 #define BPRINTK(fmt, args...) if (ap->flags & ATA_FLAG_DEBUGMSG) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
74
75 /* NEW: debug levels */
76 #define HAVE_LIBATA_MSG 1
77
78 enum {
79 ATA_MSG_DRV = 0x0001,
80 ATA_MSG_INFO = 0x0002,
81 ATA_MSG_PROBE = 0x0004,
82 ATA_MSG_WARN = 0x0008,
83 ATA_MSG_MALLOC = 0x0010,
84 ATA_MSG_CTL = 0x0020,
85 ATA_MSG_INTR = 0x0040,
86 ATA_MSG_ERR = 0x0080,
87 };
88
89 #define ata_msg_drv(p) ((p)->msg_enable & ATA_MSG_DRV)
90 #define ata_msg_info(p) ((p)->msg_enable & ATA_MSG_INFO)
91 #define ata_msg_probe(p) ((p)->msg_enable & ATA_MSG_PROBE)
92 #define ata_msg_warn(p) ((p)->msg_enable & ATA_MSG_WARN)
93 #define ata_msg_malloc(p) ((p)->msg_enable & ATA_MSG_MALLOC)
94 #define ata_msg_ctl(p) ((p)->msg_enable & ATA_MSG_CTL)
95 #define ata_msg_intr(p) ((p)->msg_enable & ATA_MSG_INTR)
96 #define ata_msg_err(p) ((p)->msg_enable & ATA_MSG_ERR)
97
98 static inline u32 ata_msg_init(int dval, int default_msg_enable_bits)
99 {
100 if (dval < 0 || dval >= (sizeof(u32) * 8))
101 return default_msg_enable_bits; /* should be 0x1 - only driver info msgs */
102 if (!dval)
103 return 0;
104 return (1 << dval) - 1;
105 }
106
107 /* defines only for the constants which don't work well as enums */
108 #define ATA_TAG_POISON 0xfafbfcfdU
109
110 /* move to PCI layer? */
111 static inline struct device *pci_dev_to_dev(struct pci_dev *pdev)
112 {
113 return &pdev->dev;
114 }
115
116 enum {
117 /* various global constants */
118 LIBATA_MAX_PRD = ATA_MAX_PRD / 2,
119 LIBATA_DUMB_MAX_PRD = ATA_MAX_PRD / 4, /* Worst case */
120 ATA_MAX_PORTS = 8,
121 ATA_DEF_QUEUE = 1,
122 /* tag ATA_MAX_QUEUE - 1 is reserved for internal commands */
123 ATA_MAX_QUEUE = 32,
124 ATA_TAG_INTERNAL = ATA_MAX_QUEUE - 1,
125 ATA_MAX_BUS = 2,
126 ATA_DEF_BUSY_WAIT = 10000,
127 ATA_SHORT_PAUSE = (HZ >> 6) + 1,
128
129 ATA_SHT_EMULATED = 1,
130 ATA_SHT_CMD_PER_LUN = 1,
131 ATA_SHT_THIS_ID = -1,
132 ATA_SHT_USE_CLUSTERING = 1,
133
134 /* struct ata_device stuff */
135 ATA_DFLAG_LBA = (1 << 0), /* device supports LBA */
136 ATA_DFLAG_LBA48 = (1 << 1), /* device supports LBA48 */
137 ATA_DFLAG_CDB_INTR = (1 << 2), /* device asserts INTRQ when ready for CDB */
138 ATA_DFLAG_NCQ = (1 << 3), /* device supports NCQ */
139 ATA_DFLAG_FLUSH_EXT = (1 << 4), /* do FLUSH_EXT instead of FLUSH */
140 ATA_DFLAG_ACPI_PENDING = (1 << 5), /* ACPI resume action pending */
141 ATA_DFLAG_ACPI_FAILED = (1 << 6), /* ACPI on devcfg has failed */
142 ATA_DFLAG_CFG_MASK = (1 << 8) - 1,
143
144 ATA_DFLAG_PIO = (1 << 8), /* device limited to PIO mode */
145 ATA_DFLAG_NCQ_OFF = (1 << 9), /* device limited to non-NCQ mode */
146 ATA_DFLAG_SPUNDOWN = (1 << 10), /* XXX: for spindown_compat */
147 ATA_DFLAG_INIT_MASK = (1 << 16) - 1,
148
149 ATA_DFLAG_DETACH = (1 << 16),
150 ATA_DFLAG_DETACHED = (1 << 17),
151
152 ATA_DEV_UNKNOWN = 0, /* unknown device */
153 ATA_DEV_ATA = 1, /* ATA device */
154 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */
155 ATA_DEV_ATAPI = 3, /* ATAPI device */
156 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */
157 ATA_DEV_NONE = 5, /* no device */
158
159 /* struct ata_port flags */
160 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */
161 /* (doesn't imply presence) */
162 ATA_FLAG_SATA = (1 << 1),
163 ATA_FLAG_NO_LEGACY = (1 << 2), /* no legacy mode check */
164 ATA_FLAG_MMIO = (1 << 3), /* use MMIO, not PIO */
165 ATA_FLAG_SRST = (1 << 4), /* (obsolete) use ATA SRST, not E.D.D. */
166 ATA_FLAG_SATA_RESET = (1 << 5), /* (obsolete) use COMRESET */
167 ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */
168 ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */
169 ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */
170 ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD
171 * doesn't handle PIO interrupts */
172 ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */
173 ATA_FLAG_HRST_TO_RESUME = (1 << 11), /* hardreset to resume phy */
174 ATA_FLAG_SKIP_D2H_BSY = (1 << 12), /* can't wait for the first D2H
175 * Register FIS clearing BSY */
176 ATA_FLAG_DEBUGMSG = (1 << 13),
177 ATA_FLAG_IGN_SIMPLEX = (1 << 15), /* ignore SIMPLEX */
178 ATA_FLAG_NO_IORDY = (1 << 16), /* controller lacks iordy */
179 ATA_FLAG_ACPI_SATA = (1 << 17), /* need native SATA ACPI layout */
180
181 /* The following flag belongs to ap->pflags but is kept in
182 * ap->flags because it's referenced in many LLDs and will be
183 * removed in not-too-distant future.
184 */
185 ATA_FLAG_DISABLED = (1 << 23), /* port is disabled, ignore it */
186
187 /* bits 24:31 of ap->flags are reserved for LLD specific flags */
188
189 /* struct ata_port pflags */
190 ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */
191 ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */
192 ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */
193 ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */
194 ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */
195 ATA_PFLAG_UNLOADING = (1 << 5), /* module is unloading */
196 ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */
197 ATA_PFLAG_INITIALIZING = (1 << 7), /* being initialized, don't touch */
198
199 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */
200 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */
201 ATA_PFLAG_GTM_VALID = (1 << 19), /* acpi_gtm data valid */
202
203 /* struct ata_queued_cmd flags */
204 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */
205 ATA_QCFLAG_SG = (1 << 1), /* have s/g table? */
206 ATA_QCFLAG_SINGLE = (1 << 2), /* no s/g, just a single buffer */
207 ATA_QCFLAG_DMAMAP = ATA_QCFLAG_SG | ATA_QCFLAG_SINGLE,
208 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */
209 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */
210
211 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */
212 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */
213 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */
214
215 /* host set flags */
216 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */
217 ATA_HOST_STARTED = (1 << 1), /* Host started */
218
219 /* bits 24:31 of host->flags are reserved for LLD specific flags */
220
221 /* various lengths of time */
222 ATA_TMOUT_BOOT = 30 * HZ, /* heuristic */
223 ATA_TMOUT_BOOT_QUICK = 7 * HZ, /* heuristic */
224 ATA_TMOUT_INTERNAL = 30 * HZ,
225 ATA_TMOUT_INTERNAL_QUICK = 5 * HZ,
226
227 /* ATA bus states */
228 BUS_UNKNOWN = 0,
229 BUS_DMA = 1,
230 BUS_IDLE = 2,
231 BUS_NOINTR = 3,
232 BUS_NODATA = 4,
233 BUS_TIMER = 5,
234 BUS_PIO = 6,
235 BUS_EDD = 7,
236 BUS_IDENTIFY = 8,
237 BUS_PACKET = 9,
238
239 /* SATA port states */
240 PORT_UNKNOWN = 0,
241 PORT_ENABLED = 1,
242 PORT_DISABLED = 2,
243
244 /* encoding various smaller bitmaps into a single
245 * unsigned int bitmap
246 */
247 ATA_BITS_PIO = 7,
248 ATA_BITS_MWDMA = 5,
249 ATA_BITS_UDMA = 8,
250
251 ATA_SHIFT_PIO = 0,
252 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_BITS_PIO,
253 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_BITS_MWDMA,
254
255 ATA_MASK_PIO = ((1 << ATA_BITS_PIO) - 1) << ATA_SHIFT_PIO,
256 ATA_MASK_MWDMA = ((1 << ATA_BITS_MWDMA) - 1) << ATA_SHIFT_MWDMA,
257 ATA_MASK_UDMA = ((1 << ATA_BITS_UDMA) - 1) << ATA_SHIFT_UDMA,
258
259 /* size of buffer to pad xfers ending on unaligned boundaries */
260 ATA_DMA_PAD_SZ = 4,
261 ATA_DMA_PAD_BUF_SZ = ATA_DMA_PAD_SZ * ATA_MAX_QUEUE,
262
263 /* ering size */
264 ATA_ERING_SIZE = 32,
265
266 /* desc_len for ata_eh_info and context */
267 ATA_EH_DESC_LEN = 80,
268
269 /* reset / recovery action types */
270 ATA_EH_REVALIDATE = (1 << 0),
271 ATA_EH_SOFTRESET = (1 << 1),
272 ATA_EH_HARDRESET = (1 << 2),
273
274 ATA_EH_RESET_MASK = ATA_EH_SOFTRESET | ATA_EH_HARDRESET,
275 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE,
276
277 /* ata_eh_info->flags */
278 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */
279 ATA_EHI_RESUME_LINK = (1 << 1), /* resume link (reset modifier) */
280 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */
281 ATA_EHI_QUIET = (1 << 3), /* be quiet */
282
283 ATA_EHI_DID_SOFTRESET = (1 << 16), /* already soft-reset this port */
284 ATA_EHI_DID_HARDRESET = (1 << 17), /* already soft-reset this port */
285 ATA_EHI_PRINTINFO = (1 << 18), /* print configuration info */
286 ATA_EHI_SETMODE = (1 << 19), /* configure transfer mode */
287 ATA_EHI_POST_SETMODE = (1 << 20), /* revaildating after setmode */
288
289 ATA_EHI_DID_RESET = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET,
290 ATA_EHI_RESET_MODIFIER_MASK = ATA_EHI_RESUME_LINK,
291
292 /* max repeat if error condition is still set after ->error_handler */
293 ATA_EH_MAX_REPEAT = 5,
294
295 /* how hard are we gonna try to probe/recover devices */
296 ATA_PROBE_MAX_TRIES = 3,
297 ATA_EH_DEV_TRIES = 3,
298
299 /* Horkage types. May be set by libata or controller on drives
300 (some horkage may be drive/controller pair dependant */
301
302 ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */
303 ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */
304 ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */
305 ATA_HORKAGE_MAX_SEC_128 = (1 << 3), /* Limit max sects to 128 */
306 ATA_HORKAGE_BROKEN_HPA = (1 << 4), /* Broken HPA */
307 };
308
309 enum hsm_task_states {
310 HSM_ST_IDLE, /* no command on going */
311 HSM_ST_FIRST, /* (waiting the device to)
312 write CDB or first data block */
313 HSM_ST, /* (waiting the device to) transfer data */
314 HSM_ST_LAST, /* (waiting the device to) complete command */
315 HSM_ST_ERR, /* error */
316 };
317
318 enum ata_completion_errors {
319 AC_ERR_DEV = (1 << 0), /* device reported error */
320 AC_ERR_HSM = (1 << 1), /* host state machine violation */
321 AC_ERR_TIMEOUT = (1 << 2), /* timeout */
322 AC_ERR_MEDIA = (1 << 3), /* media error */
323 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */
324 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */
325 AC_ERR_SYSTEM = (1 << 6), /* system error */
326 AC_ERR_INVALID = (1 << 7), /* invalid argument */
327 AC_ERR_OTHER = (1 << 8), /* unknown */
328 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */
329 AC_ERR_NCQ = (1 << 10), /* marker for offending NCQ qc */
330 };
331
332 /* forward declarations */
333 struct scsi_device;
334 struct ata_port_operations;
335 struct ata_port;
336 struct ata_link;
337 struct ata_queued_cmd;
338
339 /* typedefs */
340 typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
341 typedef int (*ata_prereset_fn_t)(struct ata_link *link, unsigned long deadline);
342 typedef int (*ata_reset_fn_t)(struct ata_link *link, unsigned int *classes,
343 unsigned long deadline);
344 typedef void (*ata_postreset_fn_t)(struct ata_link *link, unsigned int *classes);
345
346 struct ata_ioports {
347 void __iomem *cmd_addr;
348 void __iomem *data_addr;
349 void __iomem *error_addr;
350 void __iomem *feature_addr;
351 void __iomem *nsect_addr;
352 void __iomem *lbal_addr;
353 void __iomem *lbam_addr;
354 void __iomem *lbah_addr;
355 void __iomem *device_addr;
356 void __iomem *status_addr;
357 void __iomem *command_addr;
358 void __iomem *altstatus_addr;
359 void __iomem *ctl_addr;
360 void __iomem *bmdma_addr;
361 void __iomem *scr_addr;
362 };
363
364 struct ata_host {
365 spinlock_t lock;
366 struct device *dev;
367 unsigned long irq;
368 unsigned long irq2;
369 void __iomem * const *iomap;
370 unsigned int n_ports;
371 void *private_data;
372 const struct ata_port_operations *ops;
373 unsigned long flags;
374 #ifdef CONFIG_ATA_ACPI
375 acpi_handle acpi_handle;
376 #endif
377 struct ata_port *simplex_claimed; /* channel owning the DMA */
378 struct ata_port *ports[0];
379 };
380
381 struct ata_queued_cmd {
382 struct ata_port *ap;
383 struct ata_device *dev;
384
385 struct scsi_cmnd *scsicmd;
386 void (*scsidone)(struct scsi_cmnd *);
387
388 struct ata_taskfile tf;
389 u8 cdb[ATAPI_CDB_LEN];
390
391 unsigned long flags; /* ATA_QCFLAG_xxx */
392 unsigned int tag;
393 unsigned int n_elem;
394 unsigned int orig_n_elem;
395
396 int dma_dir;
397
398 unsigned int pad_len;
399 unsigned int sect_size;
400
401 unsigned int nbytes;
402 unsigned int curbytes;
403
404 unsigned int cursg;
405 unsigned int cursg_ofs;
406
407 struct scatterlist sgent;
408 struct scatterlist pad_sgent;
409 void *buf_virt;
410
411 /* DO NOT iterate over __sg manually, use ata_for_each_sg() */
412 struct scatterlist *__sg;
413
414 unsigned int err_mask;
415 struct ata_taskfile result_tf;
416 ata_qc_cb_t complete_fn;
417
418 void *private_data;
419 void *lldd_task;
420 };
421
422 struct ata_port_stats {
423 unsigned long unhandled_irq;
424 unsigned long idle_irq;
425 unsigned long rw_reqbuf;
426 };
427
428 struct ata_ering_entry {
429 int is_io;
430 unsigned int err_mask;
431 u64 timestamp;
432 };
433
434 struct ata_ering {
435 int cursor;
436 struct ata_ering_entry ring[ATA_ERING_SIZE];
437 };
438
439 struct ata_device {
440 struct ata_link *link;
441 unsigned int devno; /* 0 or 1 */
442 unsigned long flags; /* ATA_DFLAG_xxx */
443 unsigned int horkage; /* List of broken features */
444 struct scsi_device *sdev; /* attached SCSI device */
445 #ifdef CONFIG_ATA_ACPI
446 acpi_handle acpi_handle;
447 #endif
448 /* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */
449 u64 n_sectors; /* size of device, if ATA */
450 unsigned int class; /* ATA_DEV_xxx */
451 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
452 u8 pio_mode;
453 u8 dma_mode;
454 u8 xfer_mode;
455 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
456
457 unsigned int multi_count; /* sectors count for
458 READ/WRITE MULTIPLE */
459 unsigned int max_sectors; /* per-device max sectors */
460 unsigned int cdb_len;
461
462 /* per-dev xfer mask */
463 unsigned int pio_mask;
464 unsigned int mwdma_mask;
465 unsigned int udma_mask;
466
467 /* for CHS addressing */
468 u16 cylinders; /* Number of cylinders */
469 u16 heads; /* Number of heads */
470 u16 sectors; /* Number of sectors per track */
471
472 /* error history */
473 struct ata_ering ering;
474 int spdn_cnt;
475 };
476
477 /* Offset into struct ata_device. Fields above it are maintained
478 * acress device init. Fields below are zeroed.
479 */
480 #define ATA_DEVICE_CLEAR_OFFSET offsetof(struct ata_device, n_sectors)
481
482 struct ata_eh_info {
483 struct ata_device *dev; /* offending device */
484 u32 serror; /* SError from LLDD */
485 unsigned int err_mask; /* port-wide err_mask */
486 unsigned int action; /* ATA_EH_* action mask */
487 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */
488 unsigned int flags; /* ATA_EHI_* flags */
489
490 unsigned int probe_mask;
491
492 char desc[ATA_EH_DESC_LEN];
493 int desc_len;
494 };
495
496 struct ata_eh_context {
497 struct ata_eh_info i;
498 int tries[ATA_MAX_DEVICES];
499 unsigned int classes[ATA_MAX_DEVICES];
500 unsigned int did_probe_mask;
501 };
502
503 struct ata_acpi_drive
504 {
505 u32 pio;
506 u32 dma;
507 } __packed;
508
509 struct ata_acpi_gtm {
510 struct ata_acpi_drive drive[2];
511 u32 flags;
512 } __packed;
513
514 struct ata_link {
515 struct ata_port *ap;
516
517 unsigned int active_tag; /* active tag on this link */
518 u32 sactive; /* active NCQ commands */
519
520 unsigned int hw_sata_spd_limit;
521 unsigned int sata_spd_limit;
522 unsigned int sata_spd; /* current SATA PHY speed */
523
524 /* record runtime error info, protected by host_set lock */
525 struct ata_eh_info eh_info;
526 /* EH context */
527 struct ata_eh_context eh_context;
528
529 struct ata_device device[ATA_MAX_DEVICES];
530 };
531
532 struct ata_port {
533 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */
534 const struct ata_port_operations *ops;
535 spinlock_t *lock;
536 unsigned long flags; /* ATA_FLAG_xxx */
537 unsigned int pflags; /* ATA_PFLAG_xxx */
538 unsigned int print_id; /* user visible unique port ID */
539 unsigned int port_no; /* 0 based port no. inside the host */
540
541 struct ata_prd *prd; /* our SG list */
542 dma_addr_t prd_dma; /* and its DMA mapping */
543
544 void *pad; /* array of DMA pad buffers */
545 dma_addr_t pad_dma;
546
547 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
548
549 u8 ctl; /* cache of ATA control register */
550 u8 last_ctl; /* Cache last written value */
551 unsigned int pio_mask;
552 unsigned int mwdma_mask;
553 unsigned int udma_mask;
554 unsigned int cbl; /* cable type; ATA_CBL_xxx */
555
556 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
557 unsigned long qc_allocated;
558 unsigned int qc_active;
559
560 struct ata_link link; /* host default link */
561
562 struct ata_port_stats stats;
563 struct ata_host *host;
564 struct device *dev;
565
566 void *port_task_data;
567 struct delayed_work port_task;
568 struct delayed_work hotplug_task;
569 struct work_struct scsi_rescan_task;
570
571 unsigned int hsm_task_state;
572
573 u32 msg_enable;
574 struct list_head eh_done_q;
575 wait_queue_head_t eh_wait_q;
576
577 pm_message_t pm_mesg;
578 int *pm_result;
579
580 struct timer_list fastdrain_timer;
581 unsigned long fastdrain_cnt;
582
583 void *private_data;
584
585 #ifdef CONFIG_ATA_ACPI
586 acpi_handle acpi_handle;
587 struct ata_acpi_gtm acpi_gtm;
588 #endif
589 u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */
590 };
591
592 struct ata_port_operations {
593 void (*port_disable) (struct ata_port *);
594
595 void (*dev_config) (struct ata_device *);
596
597 void (*set_piomode) (struct ata_port *, struct ata_device *);
598 void (*set_dmamode) (struct ata_port *, struct ata_device *);
599 unsigned long (*mode_filter) (struct ata_device *, unsigned long);
600
601 void (*tf_load) (struct ata_port *ap, const struct ata_taskfile *tf);
602 void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf);
603
604 void (*exec_command)(struct ata_port *ap, const struct ata_taskfile *tf);
605 u8 (*check_status)(struct ata_port *ap);
606 u8 (*check_altstatus)(struct ata_port *ap);
607 void (*dev_select)(struct ata_port *ap, unsigned int device);
608
609 void (*phy_reset) (struct ata_port *ap); /* obsolete */
610 int (*set_mode) (struct ata_link *link, struct ata_device **r_failed_dev);
611
612 int (*cable_detect) (struct ata_port *ap);
613
614 int (*check_atapi_dma) (struct ata_queued_cmd *qc);
615
616 void (*bmdma_setup) (struct ata_queued_cmd *qc);
617 void (*bmdma_start) (struct ata_queued_cmd *qc);
618
619 void (*data_xfer) (struct ata_device *, unsigned char *, unsigned int, int);
620
621 void (*qc_prep) (struct ata_queued_cmd *qc);
622 unsigned int (*qc_issue) (struct ata_queued_cmd *qc);
623
624 /* Error handlers. ->error_handler overrides ->eng_timeout and
625 * indicates that new-style EH is in place.
626 */
627 void (*eng_timeout) (struct ata_port *ap); /* obsolete */
628
629 void (*freeze) (struct ata_port *ap);
630 void (*thaw) (struct ata_port *ap);
631 void (*error_handler) (struct ata_port *ap);
632 void (*post_internal_cmd) (struct ata_queued_cmd *qc);
633
634 irq_handler_t irq_handler;
635 void (*irq_clear) (struct ata_port *);
636 u8 (*irq_on) (struct ata_port *);
637 u8 (*irq_ack) (struct ata_port *ap, unsigned int chk_drq);
638
639 int (*scr_read) (struct ata_port *ap, unsigned int sc_reg, u32 *val);
640 int (*scr_write) (struct ata_port *ap, unsigned int sc_reg, u32 val);
641
642 int (*port_suspend) (struct ata_port *ap, pm_message_t mesg);
643 int (*port_resume) (struct ata_port *ap);
644
645 int (*port_start) (struct ata_port *ap);
646 void (*port_stop) (struct ata_port *ap);
647
648 void (*host_stop) (struct ata_host *host);
649
650 void (*bmdma_stop) (struct ata_queued_cmd *qc);
651 u8 (*bmdma_status) (struct ata_port *ap);
652 };
653
654 struct ata_port_info {
655 struct scsi_host_template *sht;
656 unsigned long flags;
657 unsigned long pio_mask;
658 unsigned long mwdma_mask;
659 unsigned long udma_mask;
660 const struct ata_port_operations *port_ops;
661 irq_handler_t irq_handler;
662 void *private_data;
663 };
664
665 struct ata_timing {
666 unsigned short mode; /* ATA mode */
667 unsigned short setup; /* t1 */
668 unsigned short act8b; /* t2 for 8-bit I/O */
669 unsigned short rec8b; /* t2i for 8-bit I/O */
670 unsigned short cyc8b; /* t0 for 8-bit I/O */
671 unsigned short active; /* t2 or tD */
672 unsigned short recover; /* t2i or tK */
673 unsigned short cycle; /* t0 */
674 unsigned short udma; /* t2CYCTYP/2 */
675 };
676
677 #define FIT(v,vmin,vmax) max_t(short,min_t(short,v,vmax),vmin)
678
679 extern const unsigned long sata_deb_timing_normal[];
680 extern const unsigned long sata_deb_timing_hotplug[];
681 extern const unsigned long sata_deb_timing_long[];
682
683 extern const struct ata_port_operations ata_dummy_port_ops;
684 extern const struct ata_port_info ata_dummy_port_info;
685
686 static inline const unsigned long *
687 sata_ehc_deb_timing(struct ata_eh_context *ehc)
688 {
689 if (ehc->i.flags & ATA_EHI_HOTPLUGGED)
690 return sata_deb_timing_hotplug;
691 else
692 return sata_deb_timing_normal;
693 }
694
695 static inline int ata_port_is_dummy(struct ata_port *ap)
696 {
697 return ap->ops == &ata_dummy_port_ops;
698 }
699
700 extern void sata_print_link_status(struct ata_link *link);
701 extern void ata_port_probe(struct ata_port *);
702 extern void __sata_phy_reset(struct ata_port *ap);
703 extern void sata_phy_reset(struct ata_port *ap);
704 extern void ata_bus_reset(struct ata_port *ap);
705 extern int sata_set_spd(struct ata_link *link);
706 extern int sata_link_debounce(struct ata_link *link,
707 const unsigned long *params, unsigned long deadline);
708 extern int sata_link_resume(struct ata_link *link, const unsigned long *params,
709 unsigned long deadline);
710 extern int ata_std_prereset(struct ata_link *link, unsigned long deadline);
711 extern int ata_std_softreset(struct ata_link *link, unsigned int *classes,
712 unsigned long deadline);
713 extern int sata_link_hardreset(struct ata_link *link,
714 const unsigned long *timing, unsigned long deadline);
715 extern int sata_std_hardreset(struct ata_link *link, unsigned int *class,
716 unsigned long deadline);
717 extern void ata_std_postreset(struct ata_link *link, unsigned int *classes);
718 extern void ata_port_disable(struct ata_port *);
719 extern void ata_std_ports(struct ata_ioports *ioaddr);
720 #ifdef CONFIG_PCI
721 extern int ata_pci_init_one (struct pci_dev *pdev,
722 const struct ata_port_info * const * ppi);
723 extern void ata_pci_remove_one (struct pci_dev *pdev);
724 #ifdef CONFIG_PM
725 extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg);
726 extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev);
727 extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
728 extern int ata_pci_device_resume(struct pci_dev *pdev);
729 #endif
730 extern int ata_pci_clear_simplex(struct pci_dev *pdev);
731 #endif /* CONFIG_PCI */
732 extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports);
733 extern struct ata_host *ata_host_alloc_pinfo(struct device *dev,
734 const struct ata_port_info * const * ppi, int n_ports);
735 extern int ata_host_start(struct ata_host *host);
736 extern int ata_host_register(struct ata_host *host,
737 struct scsi_host_template *sht);
738 extern int ata_host_activate(struct ata_host *host, int irq,
739 irq_handler_t irq_handler, unsigned long irq_flags,
740 struct scsi_host_template *sht);
741 extern void ata_host_detach(struct ata_host *host);
742 extern void ata_host_init(struct ata_host *, struct device *,
743 unsigned long, const struct ata_port_operations *);
744 extern int ata_scsi_detect(struct scsi_host_template *sht);
745 extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
746 extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *));
747 extern void ata_sas_port_destroy(struct ata_port *);
748 extern struct ata_port *ata_sas_port_alloc(struct ata_host *,
749 struct ata_port_info *, struct Scsi_Host *);
750 extern int ata_sas_port_init(struct ata_port *);
751 extern int ata_sas_port_start(struct ata_port *ap);
752 extern void ata_sas_port_stop(struct ata_port *ap);
753 extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *);
754 extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
755 struct ata_port *ap);
756 extern unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc);
757 extern int sata_scr_valid(struct ata_link *link);
758 extern int sata_scr_read(struct ata_link *link, int reg, u32 *val);
759 extern int sata_scr_write(struct ata_link *link, int reg, u32 val);
760 extern int sata_scr_write_flush(struct ata_link *link, int reg, u32 val);
761 extern int ata_link_online(struct ata_link *link);
762 extern int ata_link_offline(struct ata_link *link);
763 #ifdef CONFIG_PM
764 extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg);
765 extern void ata_host_resume(struct ata_host *host);
766 #endif
767 extern int ata_ratelimit(void);
768 extern int ata_busy_sleep(struct ata_port *ap,
769 unsigned long timeout_pat, unsigned long timeout);
770 extern int ata_wait_ready(struct ata_port *ap, unsigned long deadline);
771 extern void ata_port_queue_task(struct ata_port *ap, work_func_t fn,
772 void *data, unsigned long delay);
773 extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
774 unsigned long interval_msec,
775 unsigned long timeout_msec);
776 extern unsigned int ata_dev_try_classify(struct ata_port *, unsigned int, u8 *);
777
778 /*
779 * Default driver ops implementations
780 */
781 extern void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
782 extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
783 extern void ata_tf_to_fis(const struct ata_taskfile *tf,
784 u8 pmp, int is_cmd, u8 *fis);
785 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
786 extern void ata_noop_dev_select (struct ata_port *ap, unsigned int device);
787 extern void ata_std_dev_select (struct ata_port *ap, unsigned int device);
788 extern u8 ata_check_status(struct ata_port *ap);
789 extern u8 ata_altstatus(struct ata_port *ap);
790 extern void ata_exec_command(struct ata_port *ap, const struct ata_taskfile *tf);
791 extern int ata_port_start (struct ata_port *ap);
792 extern int ata_sff_port_start (struct ata_port *ap);
793 extern irqreturn_t ata_interrupt (int irq, void *dev_instance);
794 extern void ata_data_xfer(struct ata_device *adev, unsigned char *buf,
795 unsigned int buflen, int write_data);
796 extern void ata_data_xfer_noirq(struct ata_device *adev, unsigned char *buf,
797 unsigned int buflen, int write_data);
798 extern void ata_dumb_qc_prep(struct ata_queued_cmd *qc);
799 extern void ata_qc_prep(struct ata_queued_cmd *qc);
800 extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
801 extern unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc);
802 extern void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf,
803 unsigned int buflen);
804 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
805 unsigned int n_elem);
806 extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
807 extern void ata_dev_disable(struct ata_device *adev);
808 extern void ata_id_string(const u16 *id, unsigned char *s,
809 unsigned int ofs, unsigned int len);
810 extern void ata_id_c_string(const u16 *id, unsigned char *s,
811 unsigned int ofs, unsigned int len);
812 extern void ata_id_to_dma_mode(struct ata_device *dev, u8 unknown);
813 extern void ata_bmdma_setup (struct ata_queued_cmd *qc);
814 extern void ata_bmdma_start (struct ata_queued_cmd *qc);
815 extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
816 extern u8 ata_bmdma_status(struct ata_port *ap);
817 extern void ata_bmdma_irq_clear(struct ata_port *ap);
818 extern void ata_bmdma_freeze(struct ata_port *ap);
819 extern void ata_bmdma_thaw(struct ata_port *ap);
820 extern void ata_bmdma_drive_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
821 ata_reset_fn_t softreset,
822 ata_reset_fn_t hardreset,
823 ata_postreset_fn_t postreset);
824 extern void ata_bmdma_error_handler(struct ata_port *ap);
825 extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc);
826 extern int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
827 u8 status, int in_wq);
828 extern void ata_qc_complete(struct ata_queued_cmd *qc);
829 extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active,
830 void (*finish_qc)(struct ata_queued_cmd *));
831 extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
832 void (*done)(struct scsi_cmnd *));
833 extern int ata_std_bios_param(struct scsi_device *sdev,
834 struct block_device *bdev,
835 sector_t capacity, int geom[]);
836 extern int ata_scsi_slave_config(struct scsi_device *sdev);
837 extern void ata_scsi_slave_destroy(struct scsi_device *sdev);
838 extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
839 int queue_depth);
840 extern struct ata_device *ata_dev_pair(struct ata_device *adev);
841 extern int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev);
842 extern u8 ata_irq_on(struct ata_port *ap);
843 extern u8 ata_dummy_irq_on(struct ata_port *ap);
844 extern u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq);
845 extern u8 ata_dummy_irq_ack(struct ata_port *ap, unsigned int chk_drq);
846
847 extern int ata_cable_40wire(struct ata_port *ap);
848 extern int ata_cable_80wire(struct ata_port *ap);
849 extern int ata_cable_sata(struct ata_port *ap);
850 extern int ata_cable_unknown(struct ata_port *ap);
851
852 /*
853 * Timing helpers
854 */
855
856 extern unsigned int ata_pio_need_iordy(const struct ata_device *);
857 extern int ata_timing_compute(struct ata_device *, unsigned short,
858 struct ata_timing *, int, int);
859 extern void ata_timing_merge(const struct ata_timing *,
860 const struct ata_timing *, struct ata_timing *,
861 unsigned int);
862
863 enum {
864 ATA_TIMING_SETUP = (1 << 0),
865 ATA_TIMING_ACT8B = (1 << 1),
866 ATA_TIMING_REC8B = (1 << 2),
867 ATA_TIMING_CYC8B = (1 << 3),
868 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
869 ATA_TIMING_CYC8B,
870 ATA_TIMING_ACTIVE = (1 << 4),
871 ATA_TIMING_RECOVER = (1 << 5),
872 ATA_TIMING_CYCLE = (1 << 6),
873 ATA_TIMING_UDMA = (1 << 7),
874 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
875 ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
876 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
877 ATA_TIMING_CYCLE | ATA_TIMING_UDMA,
878 };
879
880
881 #ifdef CONFIG_PCI
882 struct pci_bits {
883 unsigned int reg; /* PCI config register to read */
884 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
885 unsigned long mask;
886 unsigned long val;
887 };
888
889 extern int ata_pci_init_sff_host(struct ata_host *host);
890 extern int ata_pci_init_bmdma(struct ata_host *host);
891 extern int ata_pci_prepare_sff_host(struct pci_dev *pdev,
892 const struct ata_port_info * const * ppi,
893 struct ata_host **r_host);
894 extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
895 extern unsigned long ata_pci_default_filter(struct ata_device *, unsigned long);
896 #endif /* CONFIG_PCI */
897
898 /*
899 * EH
900 */
901 extern void ata_eng_timeout(struct ata_port *ap);
902
903 extern void ata_port_schedule_eh(struct ata_port *ap);
904 extern int ata_port_abort(struct ata_port *ap);
905 extern int ata_port_freeze(struct ata_port *ap);
906
907 extern void ata_eh_freeze_port(struct ata_port *ap);
908 extern void ata_eh_thaw_port(struct ata_port *ap);
909
910 extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
911 extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
912
913 extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
914 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
915 ata_postreset_fn_t postreset);
916
917 /*
918 * printk helpers
919 */
920 #define ata_port_printk(ap, lv, fmt, args...) \
921 printk(lv"ata%u: "fmt, (ap)->print_id , ##args)
922
923 #define ata_link_printk(link, lv, fmt, args...) \
924 printk(lv"ata%u: "fmt, (link)->ap->print_id , ##args)
925
926 #define ata_dev_printk(dev, lv, fmt, args...) \
927 printk(lv"ata%u.%02u: "fmt, (dev)->link->ap->print_id, (dev)->devno , ##args)
928
929 /*
930 * ata_eh_info helpers
931 */
932 extern void __ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...);
933 extern void ata_ehi_push_desc(struct ata_eh_info *ehi, const char *fmt, ...);
934 extern void ata_ehi_clear_desc(struct ata_eh_info *ehi);
935
936 static inline void ata_ehi_schedule_probe(struct ata_eh_info *ehi)
937 {
938 ehi->flags |= ATA_EHI_RESUME_LINK;
939 ehi->action |= ATA_EH_SOFTRESET;
940 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
941 }
942
943 static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
944 {
945 ata_ehi_schedule_probe(ehi);
946 ehi->flags |= ATA_EHI_HOTPLUGGED;
947 ehi->err_mask |= AC_ERR_ATA_BUS;
948 }
949
950 /*
951 * qc helpers
952 */
953 static inline int
954 ata_sg_is_last(struct scatterlist *sg, struct ata_queued_cmd *qc)
955 {
956 if (sg == &qc->pad_sgent)
957 return 1;
958 if (qc->pad_len)
959 return 0;
960 if (((sg - qc->__sg) + 1) == qc->n_elem)
961 return 1;
962 return 0;
963 }
964
965 static inline struct scatterlist *
966 ata_qc_first_sg(struct ata_queued_cmd *qc)
967 {
968 if (qc->n_elem)
969 return qc->__sg;
970 if (qc->pad_len)
971 return &qc->pad_sgent;
972 return NULL;
973 }
974
975 static inline struct scatterlist *
976 ata_qc_next_sg(struct scatterlist *sg, struct ata_queued_cmd *qc)
977 {
978 if (sg == &qc->pad_sgent)
979 return NULL;
980 if (++sg - qc->__sg < qc->n_elem)
981 return sg;
982 if (qc->pad_len)
983 return &qc->pad_sgent;
984 return NULL;
985 }
986
987 #define ata_for_each_sg(sg, qc) \
988 for (sg = ata_qc_first_sg(qc); sg; sg = ata_qc_next_sg(sg, qc))
989
990 static inline unsigned int ata_tag_valid(unsigned int tag)
991 {
992 return (tag < ATA_MAX_QUEUE) ? 1 : 0;
993 }
994
995 static inline unsigned int ata_tag_internal(unsigned int tag)
996 {
997 return tag == ATA_MAX_QUEUE - 1;
998 }
999
1000 /*
1001 * device helpers
1002 */
1003 static inline unsigned int ata_class_enabled(unsigned int class)
1004 {
1005 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI;
1006 }
1007
1008 static inline unsigned int ata_class_disabled(unsigned int class)
1009 {
1010 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP;
1011 }
1012
1013 static inline unsigned int ata_class_absent(unsigned int class)
1014 {
1015 return !ata_class_enabled(class) && !ata_class_disabled(class);
1016 }
1017
1018 static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
1019 {
1020 return ata_class_enabled(dev->class);
1021 }
1022
1023 static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
1024 {
1025 return ata_class_disabled(dev->class);
1026 }
1027
1028 static inline unsigned int ata_dev_absent(const struct ata_device *dev)
1029 {
1030 return ata_class_absent(dev->class);
1031 }
1032
1033 /*
1034 * link helpers
1035 */
1036 static inline int ata_link_max_devices(const struct ata_link *link)
1037 {
1038 if (link->ap->flags & ATA_FLAG_SLAVE_POSS)
1039 return 2;
1040 return 1;
1041 }
1042
1043 #define ata_port_for_each_link(lk, ap) \
1044 for ((lk) = &(ap)->link; (lk); (lk) = NULL)
1045
1046 #define ata_link_for_each_dev(dev, link) \
1047 for ((dev) = (link)->device; \
1048 (dev) < (link)->device + ata_link_max_devices(link) || ((dev) = NULL); \
1049 (dev)++)
1050
1051 #define ata_link_for_each_dev_reverse(dev, link) \
1052 for ((dev) = (link)->device + ata_link_max_devices(link) - 1; \
1053 (dev) >= (link)->device || ((dev) = NULL); (dev)--)
1054
1055 static inline u8 ata_chk_status(struct ata_port *ap)
1056 {
1057 return ap->ops->check_status(ap);
1058 }
1059
1060 /**
1061 * ata_ncq_enabled - Test whether NCQ is enabled
1062 * @dev: ATA device to test for
1063 *
1064 * LOCKING:
1065 * spin_lock_irqsave(host lock)
1066 *
1067 * RETURNS:
1068 * 1 if NCQ is enabled for @dev, 0 otherwise.
1069 */
1070 static inline int ata_ncq_enabled(struct ata_device *dev)
1071 {
1072 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF |
1073 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ;
1074 }
1075
1076 /**
1077 * ata_pause - Flush writes and pause 400 nanoseconds.
1078 * @ap: Port to wait for.
1079 *
1080 * LOCKING:
1081 * Inherited from caller.
1082 */
1083
1084 static inline void ata_pause(struct ata_port *ap)
1085 {
1086 ata_altstatus(ap);
1087 ndelay(400);
1088 }
1089
1090
1091 /**
1092 * ata_busy_wait - Wait for a port status register
1093 * @ap: Port to wait for.
1094 * @bits: bits that must be clear
1095 * @max: number of 10uS waits to perform
1096 *
1097 * Waits up to max*10 microseconds for the selected bits in the port's
1098 * status register to be cleared.
1099 * Returns final value of status register.
1100 *
1101 * LOCKING:
1102 * Inherited from caller.
1103 */
1104
1105 static inline u8 ata_busy_wait(struct ata_port *ap, unsigned int bits,
1106 unsigned int max)
1107 {
1108 u8 status;
1109
1110 do {
1111 udelay(10);
1112 status = ata_chk_status(ap);
1113 max--;
1114 } while (status != 0xff && (status & bits) && (max > 0));
1115
1116 return status;
1117 }
1118
1119
1120 /**
1121 * ata_wait_idle - Wait for a port to be idle.
1122 * @ap: Port to wait for.
1123 *
1124 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
1125 * Returns final value of status register.
1126 *
1127 * LOCKING:
1128 * Inherited from caller.
1129 */
1130
1131 static inline u8 ata_wait_idle(struct ata_port *ap)
1132 {
1133 u8 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
1134
1135 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ)))
1136 DPRINTK("ATA: abnormal status 0x%X on port 0x%p\n",
1137 status, ap->ioaddr.status_addr);
1138
1139 return status;
1140 }
1141
1142 static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
1143 {
1144 qc->tf.ctl |= ATA_NIEN;
1145 }
1146
1147 static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap,
1148 unsigned int tag)
1149 {
1150 if (likely(ata_tag_valid(tag)))
1151 return &ap->qcmd[tag];
1152 return NULL;
1153 }
1154
1155 static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap,
1156 unsigned int tag)
1157 {
1158 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
1159
1160 if (unlikely(!qc) || !ap->ops->error_handler)
1161 return qc;
1162
1163 if ((qc->flags & (ATA_QCFLAG_ACTIVE |
1164 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE)
1165 return qc;
1166
1167 return NULL;
1168 }
1169
1170 static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
1171 {
1172 memset(tf, 0, sizeof(*tf));
1173
1174 tf->ctl = dev->link->ap->ctl;
1175 if (dev->devno == 0)
1176 tf->device = ATA_DEVICE_OBS;
1177 else
1178 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
1179 }
1180
1181 static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
1182 {
1183 qc->dma_dir = DMA_NONE;
1184 qc->__sg = NULL;
1185 qc->flags = 0;
1186 qc->cursg = qc->cursg_ofs = 0;
1187 qc->nbytes = qc->curbytes = 0;
1188 qc->n_elem = 0;
1189 qc->err_mask = 0;
1190 qc->pad_len = 0;
1191 qc->sect_size = ATA_SECT_SIZE;
1192
1193 ata_tf_init(qc->dev, &qc->tf);
1194
1195 /* init result_tf such that it indicates normal completion */
1196 qc->result_tf.command = ATA_DRDY;
1197 qc->result_tf.feature = 0;
1198 }
1199
1200 static inline int ata_try_flush_cache(const struct ata_device *dev)
1201 {
1202 return ata_id_wcache_enabled(dev->id) ||
1203 ata_id_has_flush(dev->id) ||
1204 ata_id_has_flush_ext(dev->id);
1205 }
1206
1207 static inline unsigned int ac_err_mask(u8 status)
1208 {
1209 if (status & (ATA_BUSY | ATA_DRQ))
1210 return AC_ERR_HSM;
1211 if (status & (ATA_ERR | ATA_DF))
1212 return AC_ERR_DEV;
1213 return 0;
1214 }
1215
1216 static inline unsigned int __ac_err_mask(u8 status)
1217 {
1218 unsigned int mask = ac_err_mask(status);
1219 if (mask == 0)
1220 return AC_ERR_OTHER;
1221 return mask;
1222 }
1223
1224 static inline int ata_pad_alloc(struct ata_port *ap, struct device *dev)
1225 {
1226 ap->pad_dma = 0;
1227 ap->pad = dmam_alloc_coherent(dev, ATA_DMA_PAD_BUF_SZ,
1228 &ap->pad_dma, GFP_KERNEL);
1229 return (ap->pad == NULL) ? -ENOMEM : 0;
1230 }
1231
1232 static inline void ata_pad_free(struct ata_port *ap, struct device *dev)
1233 {
1234 dmam_free_coherent(dev, ATA_DMA_PAD_BUF_SZ, ap->pad, ap->pad_dma);
1235 }
1236
1237 static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
1238 {
1239 return *(struct ata_port **)&host->hostdata[0];
1240 }
1241
1242 #endif /* __LINUX_LIBATA_H__ */
Linux kernel - Deliverables
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