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