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