projects / deliverable / linux.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Merge git://oss.sgi.com:8090/xfs/xfs-2.6
[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_SUSPENDED = (1 << 10), /* device suspended */
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_SETXFER_POLLING= (1 << 14), /* use polling for SETXFER */
175 ATA_FLAG_IGN_SIMPLEX = (1 << 15), /* ignore SIMPLEX */
176 ATA_FLAG_NO_IORDY = (1 << 16), /* controller lacks iordy */
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
195 ATA_PFLAG_FLUSH_PORT_TASK = (1 << 16), /* flush port task */
196 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */
197 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */
198
199 /* struct ata_queued_cmd flags */
200 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */
201 ATA_QCFLAG_SG = (1 << 1), /* have s/g table? */
202 ATA_QCFLAG_SINGLE = (1 << 2), /* no s/g, just a single buffer */
203 ATA_QCFLAG_DMAMAP = ATA_QCFLAG_SG | ATA_QCFLAG_SINGLE,
204 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */
205 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */
206
207 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */
208 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */
209 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */
210
211 /* host set flags */
212 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */
213 ATA_HOST_STARTED = (1 << 1), /* Host started */
214
215 /* various lengths of time */
216 ATA_TMOUT_BOOT = 30 * HZ, /* heuristic */
217 ATA_TMOUT_BOOT_QUICK = 7 * HZ, /* heuristic */
218 ATA_TMOUT_INTERNAL = 30 * HZ,
219 ATA_TMOUT_INTERNAL_QUICK = 5 * HZ,
220
221 /* ATA bus states */
222 BUS_UNKNOWN = 0,
223 BUS_DMA = 1,
224 BUS_IDLE = 2,
225 BUS_NOINTR = 3,
226 BUS_NODATA = 4,
227 BUS_TIMER = 5,
228 BUS_PIO = 6,
229 BUS_EDD = 7,
230 BUS_IDENTIFY = 8,
231 BUS_PACKET = 9,
232
233 /* SATA port states */
234 PORT_UNKNOWN = 0,
235 PORT_ENABLED = 1,
236 PORT_DISABLED = 2,
237
238 /* encoding various smaller bitmaps into a single
239 * unsigned int bitmap
240 */
241 ATA_BITS_PIO = 7,
242 ATA_BITS_MWDMA = 5,
243 ATA_BITS_UDMA = 8,
244
245 ATA_SHIFT_PIO = 0,
246 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_BITS_PIO,
247 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_BITS_MWDMA,
248
249 ATA_MASK_PIO = ((1 << ATA_BITS_PIO) - 1) << ATA_SHIFT_PIO,
250 ATA_MASK_MWDMA = ((1 << ATA_BITS_MWDMA) - 1) << ATA_SHIFT_MWDMA,
251 ATA_MASK_UDMA = ((1 << ATA_BITS_UDMA) - 1) << ATA_SHIFT_UDMA,
252
253 /* size of buffer to pad xfers ending on unaligned boundaries */
254 ATA_DMA_PAD_SZ = 4,
255 ATA_DMA_PAD_BUF_SZ = ATA_DMA_PAD_SZ * ATA_MAX_QUEUE,
256
257 /* masks for port functions */
258 ATA_PORT_PRIMARY = (1 << 0),
259 ATA_PORT_SECONDARY = (1 << 1),
260
261 /* ering size */
262 ATA_ERING_SIZE = 32,
263
264 /* desc_len for ata_eh_info and context */
265 ATA_EH_DESC_LEN = 80,
266
267 /* reset / recovery action types */
268 ATA_EH_REVALIDATE = (1 << 0),
269 ATA_EH_SOFTRESET = (1 << 1),
270 ATA_EH_HARDRESET = (1 << 2),
271 ATA_EH_SUSPEND = (1 << 3),
272 ATA_EH_RESUME = (1 << 4),
273 ATA_EH_PM_FREEZE = (1 << 5),
274
275 ATA_EH_RESET_MASK = ATA_EH_SOFTRESET | ATA_EH_HARDRESET,
276 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE | ATA_EH_SUSPEND |
277 ATA_EH_RESUME | ATA_EH_PM_FREEZE,
278
279 /* ata_eh_info->flags */
280 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */
281 ATA_EHI_RESUME_LINK = (1 << 1), /* resume link (reset modifier) */
282 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */
283 ATA_EHI_QUIET = (1 << 3), /* be quiet */
284
285 ATA_EHI_DID_SOFTRESET = (1 << 16), /* already soft-reset this port */
286 ATA_EHI_DID_HARDRESET = (1 << 17), /* already soft-reset this port */
287 ATA_EHI_PRINTINFO = (1 << 18), /* print configuration info */
288 ATA_EHI_SETMODE = (1 << 19), /* configure transfer mode */
289 ATA_EHI_POST_SETMODE = (1 << 20), /* revaildating after setmode */
290
291 ATA_EHI_DID_RESET = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET,
292 ATA_EHI_RESET_MODIFIER_MASK = ATA_EHI_RESUME_LINK,
293
294 /* max repeat if error condition is still set after ->error_handler */
295 ATA_EH_MAX_REPEAT = 5,
296
297 /* how hard are we gonna try to probe/recover devices */
298 ATA_PROBE_MAX_TRIES = 3,
299 ATA_EH_DEV_TRIES = 3,
300
301 /* Horkage types. May be set by libata or controller on drives
302 (some horkage may be drive/controller pair dependant */
303
304 ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */
305 ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */
306 ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */
307 ATA_HORKAGE_MAX_SEC_128 = (1 << 3), /* Limit max sects to 128 */
308 ATA_HORKAGE_DMA_RW_ONLY = (1 << 4), /* ATAPI DMA for RW only */
309 };
310
311 enum hsm_task_states {
312 HSM_ST_IDLE, /* no command on going */
313 HSM_ST_FIRST, /* (waiting the device to)
314 write CDB or first data block */
315 HSM_ST, /* (waiting the device to) transfer data */
316 HSM_ST_LAST, /* (waiting the device to) complete command */
317 HSM_ST_ERR, /* error */
318 };
319
320 enum ata_completion_errors {
321 AC_ERR_DEV = (1 << 0), /* device reported error */
322 AC_ERR_HSM = (1 << 1), /* host state machine violation */
323 AC_ERR_TIMEOUT = (1 << 2), /* timeout */
324 AC_ERR_MEDIA = (1 << 3), /* media error */
325 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */
326 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */
327 AC_ERR_SYSTEM = (1 << 6), /* system error */
328 AC_ERR_INVALID = (1 << 7), /* invalid argument */
329 AC_ERR_OTHER = (1 << 8), /* unknown */
330 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */
331 };
332
333 /* forward declarations */
334 struct scsi_device;
335 struct ata_port_operations;
336 struct ata_port;
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_port *ap, unsigned long deadline);
342 typedef int (*ata_reset_fn_t)(struct ata_port *ap, unsigned int *classes,
343 unsigned long deadline);
344 typedef void (*ata_postreset_fn_t)(struct ata_port *ap, 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 struct ata_port *simplex_claimed; /* channel owning the DMA */
375 struct ata_port *ports[0];
376 };
377
378 struct ata_queued_cmd {
379 struct ata_port *ap;
380 struct ata_device *dev;
381
382 struct scsi_cmnd *scsicmd;
383 void (*scsidone)(struct scsi_cmnd *);
384
385 struct ata_taskfile tf;
386 u8 cdb[ATAPI_CDB_LEN];
387
388 unsigned long flags; /* ATA_QCFLAG_xxx */
389 unsigned int tag;
390 unsigned int n_elem;
391 unsigned int orig_n_elem;
392
393 int dma_dir;
394
395 unsigned int pad_len;
396 unsigned int sect_size;
397
398 unsigned int nbytes;
399 unsigned int curbytes;
400
401 unsigned int cursg;
402 unsigned int cursg_ofs;
403
404 struct scatterlist sgent;
405 struct scatterlist pad_sgent;
406 void *buf_virt;
407
408 /* DO NOT iterate over __sg manually, use ata_for_each_sg() */
409 struct scatterlist *__sg;
410
411 unsigned int err_mask;
412 struct ata_taskfile result_tf;
413 ata_qc_cb_t complete_fn;
414
415 void *private_data;
416 };
417
418 struct ata_port_stats {
419 unsigned long unhandled_irq;
420 unsigned long idle_irq;
421 unsigned long rw_reqbuf;
422 };
423
424 struct ata_ering_entry {
425 int is_io;
426 unsigned int err_mask;
427 u64 timestamp;
428 };
429
430 struct ata_ering {
431 int cursor;
432 struct ata_ering_entry ring[ATA_ERING_SIZE];
433 };
434
435 struct ata_device {
436 struct ata_port *ap;
437 unsigned int devno; /* 0 or 1 */
438 unsigned long flags; /* ATA_DFLAG_xxx */
439 struct scsi_device *sdev; /* attached SCSI device */
440 /* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */
441 u64 n_sectors; /* size of device, if ATA */
442 u64 n_sectors_boot; /* size of ATA device at startup */
443 unsigned int class; /* ATA_DEV_xxx */
444 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
445 u8 pio_mode;
446 u8 dma_mode;
447 u8 xfer_mode;
448 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
449
450 unsigned int multi_count; /* sectors count for
451 READ/WRITE MULTIPLE */
452 unsigned int max_sectors; /* per-device max sectors */
453 unsigned int cdb_len;
454
455 /* per-dev xfer mask */
456 unsigned int pio_mask;
457 unsigned int mwdma_mask;
458 unsigned int udma_mask;
459
460 /* for CHS addressing */
461 u16 cylinders; /* Number of cylinders */
462 u16 heads; /* Number of heads */
463 u16 sectors; /* Number of sectors per track */
464
465 /* error history */
466 struct ata_ering ering;
467 int spdn_cnt;
468 unsigned int horkage; /* List of broken features */
469 #ifdef CONFIG_SATA_ACPI
470 /* ACPI objects info */
471 acpi_handle obj_handle;
472 #endif
473 };
474
475 /* Offset into struct ata_device. Fields above it are maintained
476 * acress device init. Fields below are zeroed.
477 */
478 #define ATA_DEVICE_CLEAR_OFFSET offsetof(struct ata_device, n_sectors)
479
480 struct ata_eh_info {
481 struct ata_device *dev; /* offending device */
482 u32 serror; /* SError from LLDD */
483 unsigned int err_mask; /* port-wide err_mask */
484 unsigned int action; /* ATA_EH_* action mask */
485 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */
486 unsigned int flags; /* ATA_EHI_* flags */
487
488 unsigned int probe_mask;
489
490 char desc[ATA_EH_DESC_LEN];
491 int desc_len;
492 };
493
494 struct ata_eh_context {
495 struct ata_eh_info i;
496 int tries[ATA_MAX_DEVICES];
497 unsigned int classes[ATA_MAX_DEVICES];
498 unsigned int did_probe_mask;
499 };
500
501 struct ata_port {
502 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */
503 const struct ata_port_operations *ops;
504 spinlock_t *lock;
505 unsigned long flags; /* ATA_FLAG_xxx */
506 unsigned int pflags; /* ATA_PFLAG_xxx */
507 unsigned int print_id; /* user visible unique port ID */
508 unsigned int port_no; /* 0 based port no. inside the host */
509
510 struct ata_prd *prd; /* our SG list */
511 dma_addr_t prd_dma; /* and its DMA mapping */
512
513 void *pad; /* array of DMA pad buffers */
514 dma_addr_t pad_dma;
515
516 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
517
518 u8 ctl; /* cache of ATA control register */
519 u8 last_ctl; /* Cache last written value */
520 unsigned int pio_mask;
521 unsigned int mwdma_mask;
522 unsigned int udma_mask;
523 unsigned int cbl; /* cable type; ATA_CBL_xxx */
524 unsigned int hw_sata_spd_limit;
525 unsigned int sata_spd_limit; /* SATA PHY speed limit */
526
527 /* record runtime error info, protected by host lock */
528 struct ata_eh_info eh_info;
529 /* EH context owned by EH */
530 struct ata_eh_context eh_context;
531
532 struct ata_device device[ATA_MAX_DEVICES];
533
534 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
535 unsigned long qc_allocated;
536 unsigned int qc_active;
537
538 unsigned int active_tag;
539 u32 sactive;
540
541 struct ata_port_stats stats;
542 struct ata_host *host;
543 struct device *dev;
544
545 void *port_task_data;
546 struct delayed_work port_task;
547 struct delayed_work hotplug_task;
548 struct work_struct scsi_rescan_task;
549
550 unsigned int hsm_task_state;
551
552 u32 msg_enable;
553 struct list_head eh_done_q;
554 wait_queue_head_t eh_wait_q;
555
556 pm_message_t pm_mesg;
557 int *pm_result;
558
559 void *private_data;
560
561 u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */
562 };
563
564 struct ata_port_operations {
565 void (*port_disable) (struct ata_port *);
566
567 void (*dev_config) (struct ata_device *);
568
569 void (*set_piomode) (struct ata_port *, struct ata_device *);
570 void (*set_dmamode) (struct ata_port *, struct ata_device *);
571 unsigned long (*mode_filter) (struct ata_device *, unsigned long);
572
573 void (*tf_load) (struct ata_port *ap, const struct ata_taskfile *tf);
574 void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf);
575
576 void (*exec_command)(struct ata_port *ap, const struct ata_taskfile *tf);
577 u8 (*check_status)(struct ata_port *ap);
578 u8 (*check_altstatus)(struct ata_port *ap);
579 void (*dev_select)(struct ata_port *ap, unsigned int device);
580
581 void (*phy_reset) (struct ata_port *ap); /* obsolete */
582 int (*set_mode) (struct ata_port *ap, struct ata_device **r_failed_dev);
583
584 void (*post_set_mode) (struct ata_port *ap);
585
586 int (*cable_detect) (struct ata_port *ap);
587
588 int (*check_atapi_dma) (struct ata_queued_cmd *qc);
589
590 void (*bmdma_setup) (struct ata_queued_cmd *qc);
591 void (*bmdma_start) (struct ata_queued_cmd *qc);
592
593 void (*data_xfer) (struct ata_device *, unsigned char *, unsigned int, int);
594
595 void (*qc_prep) (struct ata_queued_cmd *qc);
596 unsigned int (*qc_issue) (struct ata_queued_cmd *qc);
597
598 /* Error handlers. ->error_handler overrides ->eng_timeout and
599 * indicates that new-style EH is in place.
600 */
601 void (*eng_timeout) (struct ata_port *ap); /* obsolete */
602
603 void (*freeze) (struct ata_port *ap);
604 void (*thaw) (struct ata_port *ap);
605 void (*error_handler) (struct ata_port *ap);
606 void (*post_internal_cmd) (struct ata_queued_cmd *qc);
607
608 irq_handler_t irq_handler;
609 void (*irq_clear) (struct ata_port *);
610 u8 (*irq_on) (struct ata_port *);
611 u8 (*irq_ack) (struct ata_port *ap, unsigned int chk_drq);
612
613 u32 (*scr_read) (struct ata_port *ap, unsigned int sc_reg);
614 void (*scr_write) (struct ata_port *ap, unsigned int sc_reg,
615 u32 val);
616
617 int (*port_suspend) (struct ata_port *ap, pm_message_t mesg);
618 int (*port_resume) (struct ata_port *ap);
619
620 int (*port_start) (struct ata_port *ap);
621 void (*port_stop) (struct ata_port *ap);
622
623 void (*host_stop) (struct ata_host *host);
624
625 void (*bmdma_stop) (struct ata_queued_cmd *qc);
626 u8 (*bmdma_status) (struct ata_port *ap);
627 };
628
629 struct ata_port_info {
630 struct scsi_host_template *sht;
631 unsigned long flags;
632 unsigned long pio_mask;
633 unsigned long mwdma_mask;
634 unsigned long udma_mask;
635 const struct ata_port_operations *port_ops;
636 irq_handler_t irq_handler;
637 void *private_data;
638 };
639
640 struct ata_timing {
641 unsigned short mode; /* ATA mode */
642 unsigned short setup; /* t1 */
643 unsigned short act8b; /* t2 for 8-bit I/O */
644 unsigned short rec8b; /* t2i for 8-bit I/O */
645 unsigned short cyc8b; /* t0 for 8-bit I/O */
646 unsigned short active; /* t2 or tD */
647 unsigned short recover; /* t2i or tK */
648 unsigned short cycle; /* t0 */
649 unsigned short udma; /* t2CYCTYP/2 */
650 };
651
652 #define FIT(v,vmin,vmax) max_t(short,min_t(short,v,vmax),vmin)
653
654 extern const unsigned long sata_deb_timing_normal[];
655 extern const unsigned long sata_deb_timing_hotplug[];
656 extern const unsigned long sata_deb_timing_long[];
657
658 extern const struct ata_port_operations ata_dummy_port_ops;
659 extern const struct ata_port_info ata_dummy_port_info;
660
661 static inline const unsigned long *
662 sata_ehc_deb_timing(struct ata_eh_context *ehc)
663 {
664 if (ehc->i.flags & ATA_EHI_HOTPLUGGED)
665 return sata_deb_timing_hotplug;
666 else
667 return sata_deb_timing_normal;
668 }
669
670 static inline int ata_port_is_dummy(struct ata_port *ap)
671 {
672 return ap->ops == &ata_dummy_port_ops;
673 }
674
675 extern void sata_print_link_status(struct ata_port *ap);
676 extern void ata_port_probe(struct ata_port *);
677 extern void __sata_phy_reset(struct ata_port *ap);
678 extern void sata_phy_reset(struct ata_port *ap);
679 extern void ata_bus_reset(struct ata_port *ap);
680 extern int sata_set_spd(struct ata_port *ap);
681 extern int sata_phy_debounce(struct ata_port *ap, const unsigned long *param,
682 unsigned long deadline);
683 extern int sata_phy_resume(struct ata_port *ap, const unsigned long *param,
684 unsigned long deadline);
685 extern int ata_std_prereset(struct ata_port *ap, unsigned long deadline);
686 extern int ata_std_softreset(struct ata_port *ap, unsigned int *classes,
687 unsigned long deadline);
688 extern int sata_port_hardreset(struct ata_port *ap, const unsigned long *timing,
689 unsigned long deadline);
690 extern int sata_std_hardreset(struct ata_port *ap, unsigned int *class,
691 unsigned long deadline);
692 extern void ata_std_postreset(struct ata_port *ap, unsigned int *classes);
693 extern void ata_port_disable(struct ata_port *);
694 extern void ata_std_ports(struct ata_ioports *ioaddr);
695 #ifdef CONFIG_PCI
696 extern int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info,
697 unsigned int n_ports);
698 extern void ata_pci_remove_one (struct pci_dev *pdev);
699 #ifdef CONFIG_PM
700 extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg);
701 extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev);
702 extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
703 extern int ata_pci_device_resume(struct pci_dev *pdev);
704 #endif
705 extern int ata_pci_clear_simplex(struct pci_dev *pdev);
706 #endif /* CONFIG_PCI */
707 extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports);
708 extern struct ata_host *ata_host_alloc_pinfo(struct device *dev,
709 const struct ata_port_info * const * ppi, int n_ports);
710 extern int ata_host_start(struct ata_host *host);
711 extern int ata_host_register(struct ata_host *host,
712 struct scsi_host_template *sht);
713 extern int ata_host_activate(struct ata_host *host, int irq,
714 irq_handler_t irq_handler, unsigned long irq_flags,
715 struct scsi_host_template *sht);
716 extern void ata_host_detach(struct ata_host *host);
717 extern void ata_host_init(struct ata_host *, struct device *,
718 unsigned long, const struct ata_port_operations *);
719 extern int ata_scsi_detect(struct scsi_host_template *sht);
720 extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
721 extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *));
722 extern void ata_sas_port_destroy(struct ata_port *);
723 extern struct ata_port *ata_sas_port_alloc(struct ata_host *,
724 struct ata_port_info *, struct Scsi_Host *);
725 extern int ata_sas_port_init(struct ata_port *);
726 extern int ata_sas_port_start(struct ata_port *ap);
727 extern void ata_sas_port_stop(struct ata_port *ap);
728 extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *);
729 extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
730 struct ata_port *ap);
731 extern unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc);
732 extern int sata_scr_valid(struct ata_port *ap);
733 extern int sata_scr_read(struct ata_port *ap, int reg, u32 *val);
734 extern int sata_scr_write(struct ata_port *ap, int reg, u32 val);
735 extern int sata_scr_write_flush(struct ata_port *ap, int reg, u32 val);
736 extern int ata_port_online(struct ata_port *ap);
737 extern int ata_port_offline(struct ata_port *ap);
738 #ifdef CONFIG_PM
739 extern int ata_scsi_device_resume(struct scsi_device *);
740 extern int ata_scsi_device_suspend(struct scsi_device *, pm_message_t mesg);
741 extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg);
742 extern void ata_host_resume(struct ata_host *host);
743 #endif
744 extern int ata_ratelimit(void);
745 extern int ata_busy_sleep(struct ata_port *ap,
746 unsigned long timeout_pat, unsigned long timeout);
747 extern int ata_wait_ready(struct ata_port *ap, unsigned long deadline);
748 extern void ata_port_queue_task(struct ata_port *ap, work_func_t fn,
749 void *data, unsigned long delay);
750 extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
751 unsigned long interval_msec,
752 unsigned long timeout_msec);
753 extern unsigned int ata_dev_try_classify(struct ata_port *, unsigned int, u8 *);
754
755 /*
756 * Default driver ops implementations
757 */
758 extern void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
759 extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
760 extern void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp);
761 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
762 extern void ata_noop_dev_select (struct ata_port *ap, unsigned int device);
763 extern void ata_std_dev_select (struct ata_port *ap, unsigned int device);
764 extern u8 ata_check_status(struct ata_port *ap);
765 extern u8 ata_altstatus(struct ata_port *ap);
766 extern void ata_exec_command(struct ata_port *ap, const struct ata_taskfile *tf);
767 extern int ata_port_start (struct ata_port *ap);
768 extern irqreturn_t ata_interrupt (int irq, void *dev_instance);
769 extern void ata_data_xfer(struct ata_device *adev, unsigned char *buf,
770 unsigned int buflen, int write_data);
771 extern void ata_data_xfer_noirq(struct ata_device *adev, unsigned char *buf,
772 unsigned int buflen, int write_data);
773 extern void ata_qc_prep(struct ata_queued_cmd *qc);
774 extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
775 extern unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc);
776 extern void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf,
777 unsigned int buflen);
778 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
779 unsigned int n_elem);
780 extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
781 extern void ata_dev_disable(struct ata_device *adev);
782 extern void ata_id_string(const u16 *id, unsigned char *s,
783 unsigned int ofs, unsigned int len);
784 extern void ata_id_c_string(const u16 *id, unsigned char *s,
785 unsigned int ofs, unsigned int len);
786 extern void ata_id_to_dma_mode(struct ata_device *dev, u8 unknown);
787 extern unsigned long ata_device_blacklisted(const struct ata_device *dev);
788 extern void ata_bmdma_setup (struct ata_queued_cmd *qc);
789 extern void ata_bmdma_start (struct ata_queued_cmd *qc);
790 extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
791 extern u8 ata_bmdma_status(struct ata_port *ap);
792 extern void ata_bmdma_irq_clear(struct ata_port *ap);
793 extern void ata_bmdma_freeze(struct ata_port *ap);
794 extern void ata_bmdma_thaw(struct ata_port *ap);
795 extern void ata_bmdma_drive_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
796 ata_reset_fn_t softreset,
797 ata_reset_fn_t hardreset,
798 ata_postreset_fn_t postreset);
799 extern void ata_bmdma_error_handler(struct ata_port *ap);
800 extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc);
801 extern int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
802 u8 status, int in_wq);
803 extern void ata_qc_complete(struct ata_queued_cmd *qc);
804 extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active,
805 void (*finish_qc)(struct ata_queued_cmd *));
806 extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
807 void (*done)(struct scsi_cmnd *));
808 extern int ata_std_bios_param(struct scsi_device *sdev,
809 struct block_device *bdev,
810 sector_t capacity, int geom[]);
811 extern int ata_scsi_slave_config(struct scsi_device *sdev);
812 extern void ata_scsi_slave_destroy(struct scsi_device *sdev);
813 extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
814 int queue_depth);
815 extern struct ata_device *ata_dev_pair(struct ata_device *adev);
816 extern int ata_do_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev);
817 extern u8 ata_irq_on(struct ata_port *ap);
818 extern u8 ata_dummy_irq_on(struct ata_port *ap);
819 extern u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq);
820 extern u8 ata_dummy_irq_ack(struct ata_port *ap, unsigned int chk_drq);
821
822 extern int ata_cable_40wire(struct ata_port *ap);
823 extern int ata_cable_80wire(struct ata_port *ap);
824 extern int ata_cable_sata(struct ata_port *ap);
825 extern int ata_cable_unknown(struct ata_port *ap);
826
827 /*
828 * Timing helpers
829 */
830
831 extern unsigned int ata_pio_need_iordy(const struct ata_device *);
832 extern int ata_timing_compute(struct ata_device *, unsigned short,
833 struct ata_timing *, int, int);
834 extern void ata_timing_merge(const struct ata_timing *,
835 const struct ata_timing *, struct ata_timing *,
836 unsigned int);
837
838 enum {
839 ATA_TIMING_SETUP = (1 << 0),
840 ATA_TIMING_ACT8B = (1 << 1),
841 ATA_TIMING_REC8B = (1 << 2),
842 ATA_TIMING_CYC8B = (1 << 3),
843 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
844 ATA_TIMING_CYC8B,
845 ATA_TIMING_ACTIVE = (1 << 4),
846 ATA_TIMING_RECOVER = (1 << 5),
847 ATA_TIMING_CYCLE = (1 << 6),
848 ATA_TIMING_UDMA = (1 << 7),
849 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
850 ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
851 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
852 ATA_TIMING_CYCLE | ATA_TIMING_UDMA,
853 };
854
855
856 #ifdef CONFIG_PCI
857 struct pci_bits {
858 unsigned int reg; /* PCI config register to read */
859 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
860 unsigned long mask;
861 unsigned long val;
862 };
863
864 extern int ata_pci_init_native_host(struct ata_host *host,
865 unsigned int port_mask);
866 extern int ata_pci_prepare_native_host(struct pci_dev *pdev,
867 const struct ata_port_info * const * ppi,
868 int n_ports, struct ata_host **r_host);
869 extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
870 extern unsigned long ata_pci_default_filter(struct ata_device *, unsigned long);
871 #endif /* CONFIG_PCI */
872
873 /*
874 * EH
875 */
876 extern void ata_eng_timeout(struct ata_port *ap);
877
878 extern void ata_port_schedule_eh(struct ata_port *ap);
879 extern int ata_port_abort(struct ata_port *ap);
880 extern int ata_port_freeze(struct ata_port *ap);
881
882 extern void ata_eh_freeze_port(struct ata_port *ap);
883 extern void ata_eh_thaw_port(struct ata_port *ap);
884
885 extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
886 extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
887
888 extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
889 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
890 ata_postreset_fn_t postreset);
891
892 /*
893 * printk helpers
894 */
895 #define ata_port_printk(ap, lv, fmt, args...) \
896 printk(lv"ata%u: "fmt, (ap)->print_id , ##args)
897
898 #define ata_dev_printk(dev, lv, fmt, args...) \
899 printk(lv"ata%u.%02u: "fmt, (dev)->ap->print_id, (dev)->devno , ##args)
900
901 /*
902 * ata_eh_info helpers
903 */
904 #define ata_ehi_push_desc(ehi, fmt, args...) do { \
905 (ehi)->desc_len += scnprintf((ehi)->desc + (ehi)->desc_len, \
906 ATA_EH_DESC_LEN - (ehi)->desc_len, \
907 fmt , ##args); \
908 } while (0)
909
910 #define ata_ehi_clear_desc(ehi) do { \
911 (ehi)->desc[0] = '\0'; \
912 (ehi)->desc_len = 0; \
913 } while (0)
914
915 static inline void __ata_ehi_hotplugged(struct ata_eh_info *ehi)
916 {
917 ehi->flags |= ATA_EHI_HOTPLUGGED | ATA_EHI_RESUME_LINK;
918 ehi->action |= ATA_EH_SOFTRESET;
919 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
920 }
921
922 static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
923 {
924 __ata_ehi_hotplugged(ehi);
925 ehi->err_mask |= AC_ERR_ATA_BUS;
926 }
927
928 /*
929 * qc helpers
930 */
931 static inline int
932 ata_sg_is_last(struct scatterlist *sg, struct ata_queued_cmd *qc)
933 {
934 if (sg == &qc->pad_sgent)
935 return 1;
936 if (qc->pad_len)
937 return 0;
938 if (((sg - qc->__sg) + 1) == qc->n_elem)
939 return 1;
940 return 0;
941 }
942
943 static inline struct scatterlist *
944 ata_qc_first_sg(struct ata_queued_cmd *qc)
945 {
946 if (qc->n_elem)
947 return qc->__sg;
948 if (qc->pad_len)
949 return &qc->pad_sgent;
950 return NULL;
951 }
952
953 static inline struct scatterlist *
954 ata_qc_next_sg(struct scatterlist *sg, struct ata_queued_cmd *qc)
955 {
956 if (sg == &qc->pad_sgent)
957 return NULL;
958 if (++sg - qc->__sg < qc->n_elem)
959 return sg;
960 if (qc->pad_len)
961 return &qc->pad_sgent;
962 return NULL;
963 }
964
965 #define ata_for_each_sg(sg, qc) \
966 for (sg = ata_qc_first_sg(qc); sg; sg = ata_qc_next_sg(sg, qc))
967
968 static inline unsigned int ata_tag_valid(unsigned int tag)
969 {
970 return (tag < ATA_MAX_QUEUE) ? 1 : 0;
971 }
972
973 static inline unsigned int ata_tag_internal(unsigned int tag)
974 {
975 return tag == ATA_MAX_QUEUE - 1;
976 }
977
978 /*
979 * device helpers
980 */
981 static inline unsigned int ata_class_enabled(unsigned int class)
982 {
983 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI;
984 }
985
986 static inline unsigned int ata_class_disabled(unsigned int class)
987 {
988 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP;
989 }
990
991 static inline unsigned int ata_class_absent(unsigned int class)
992 {
993 return !ata_class_enabled(class) && !ata_class_disabled(class);
994 }
995
996 static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
997 {
998 return ata_class_enabled(dev->class);
999 }
1000
1001 static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
1002 {
1003 return ata_class_disabled(dev->class);
1004 }
1005
1006 static inline unsigned int ata_dev_absent(const struct ata_device *dev)
1007 {
1008 return ata_class_absent(dev->class);
1009 }
1010
1011 static inline unsigned int ata_dev_ready(const struct ata_device *dev)
1012 {
1013 return ata_dev_enabled(dev) && !(dev->flags & ATA_DFLAG_SUSPENDED);
1014 }
1015
1016 /*
1017 * port helpers
1018 */
1019 static inline int ata_port_max_devices(const struct ata_port *ap)
1020 {
1021 if (ap->flags & ATA_FLAG_SLAVE_POSS)
1022 return 2;
1023 return 1;
1024 }
1025
1026
1027 static inline u8 ata_chk_status(struct ata_port *ap)
1028 {
1029 return ap->ops->check_status(ap);
1030 }
1031
1032 /**
1033 * ata_ncq_enabled - Test whether NCQ is enabled
1034 * @dev: ATA device to test for
1035 *
1036 * LOCKING:
1037 * spin_lock_irqsave(host lock)
1038 *
1039 * RETURNS:
1040 * 1 if NCQ is enabled for @dev, 0 otherwise.
1041 */
1042 static inline int ata_ncq_enabled(struct ata_device *dev)
1043 {
1044 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF |
1045 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ;
1046 }
1047
1048 /**
1049 * ata_pause - Flush writes and pause 400 nanoseconds.
1050 * @ap: Port to wait for.
1051 *
1052 * LOCKING:
1053 * Inherited from caller.
1054 */
1055
1056 static inline void ata_pause(struct ata_port *ap)
1057 {
1058 ata_altstatus(ap);
1059 ndelay(400);
1060 }
1061
1062
1063 /**
1064 * ata_busy_wait - Wait for a port status register
1065 * @ap: Port to wait for.
1066 * @bits: bits that must be clear
1067 * @max: number of 10uS waits to perform
1068 *
1069 * Waits up to max*10 microseconds for the selected bits in the port's
1070 * status register to be cleared.
1071 * Returns final value of status register.
1072 *
1073 * LOCKING:
1074 * Inherited from caller.
1075 */
1076
1077 static inline u8 ata_busy_wait(struct ata_port *ap, unsigned int bits,
1078 unsigned int max)
1079 {
1080 u8 status;
1081
1082 do {
1083 udelay(10);
1084 status = ata_chk_status(ap);
1085 max--;
1086 } while (status != 0xff && (status & bits) && (max > 0));
1087
1088 return status;
1089 }
1090
1091
1092 /**
1093 * ata_wait_idle - Wait for a port to be idle.
1094 * @ap: Port to wait for.
1095 *
1096 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
1097 * Returns final value of status register.
1098 *
1099 * LOCKING:
1100 * Inherited from caller.
1101 */
1102
1103 static inline u8 ata_wait_idle(struct ata_port *ap)
1104 {
1105 u8 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
1106
1107 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ))) {
1108 if (ata_msg_warn(ap))
1109 printk(KERN_WARNING "ATA: abnormal status 0x%X on port 0x%p\n",
1110 status, ap->ioaddr.status_addr);
1111 }
1112
1113 return status;
1114 }
1115
1116 static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
1117 {
1118 qc->tf.ctl |= ATA_NIEN;
1119 }
1120
1121 static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap,
1122 unsigned int tag)
1123 {
1124 if (likely(ata_tag_valid(tag)))
1125 return &ap->qcmd[tag];
1126 return NULL;
1127 }
1128
1129 static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap,
1130 unsigned int tag)
1131 {
1132 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
1133
1134 if (unlikely(!qc) || !ap->ops->error_handler)
1135 return qc;
1136
1137 if ((qc->flags & (ATA_QCFLAG_ACTIVE |
1138 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE)
1139 return qc;
1140
1141 return NULL;
1142 }
1143
1144 static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
1145 {
1146 memset(tf, 0, sizeof(*tf));
1147
1148 tf->ctl = dev->ap->ctl;
1149 if (dev->devno == 0)
1150 tf->device = ATA_DEVICE_OBS;
1151 else
1152 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
1153 }
1154
1155 static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
1156 {
1157 qc->dma_dir = DMA_NONE;
1158 qc->__sg = NULL;
1159 qc->flags = 0;
1160 qc->cursg = qc->cursg_ofs = 0;
1161 qc->nbytes = qc->curbytes = 0;
1162 qc->n_elem = 0;
1163 qc->err_mask = 0;
1164 qc->pad_len = 0;
1165 qc->sect_size = ATA_SECT_SIZE;
1166
1167 ata_tf_init(qc->dev, &qc->tf);
1168
1169 /* init result_tf such that it indicates normal completion */
1170 qc->result_tf.command = ATA_DRDY;
1171 qc->result_tf.feature = 0;
1172 }
1173
1174 static inline int ata_try_flush_cache(const struct ata_device *dev)
1175 {
1176 return ata_id_wcache_enabled(dev->id) ||
1177 ata_id_has_flush(dev->id) ||
1178 ata_id_has_flush_ext(dev->id);
1179 }
1180
1181 static inline unsigned int ac_err_mask(u8 status)
1182 {
1183 if (status & (ATA_BUSY | ATA_DRQ))
1184 return AC_ERR_HSM;
1185 if (status & (ATA_ERR | ATA_DF))
1186 return AC_ERR_DEV;
1187 return 0;
1188 }
1189
1190 static inline unsigned int __ac_err_mask(u8 status)
1191 {
1192 unsigned int mask = ac_err_mask(status);
1193 if (mask == 0)
1194 return AC_ERR_OTHER;
1195 return mask;
1196 }
1197
1198 static inline int ata_pad_alloc(struct ata_port *ap, struct device *dev)
1199 {
1200 ap->pad_dma = 0;
1201 ap->pad = dmam_alloc_coherent(dev, ATA_DMA_PAD_BUF_SZ,
1202 &ap->pad_dma, GFP_KERNEL);
1203 return (ap->pad == NULL) ? -ENOMEM : 0;
1204 }
1205
1206 static inline void ata_pad_free(struct ata_port *ap, struct device *dev)
1207 {
1208 dmam_free_coherent(dev, ATA_DMA_PAD_BUF_SZ, ap->pad, ap->pad_dma);
1209 }
1210
1211 static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
1212 {
1213 return *(struct ata_port **)&host->hostdata[0];
1214 }
1215
1216 #endif /* __LINUX_LIBATA_H__ */
Linux kernel - Deliverables
This page took 0.057015 seconds and 6 git commands to generate.