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[PATCH] libata: always use polling IDENTIFY
[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 <asm/io.h>
35 #include <linux/ata.h>
36 #include <linux/workqueue.h>
37 #include <scsi/scsi_host.h>
38
39 /*
40 * Define if arch has non-standard setup. This is a _PCI_ standard
41 * not a legacy or ISA standard.
42 */
43 #ifdef CONFIG_ATA_NONSTANDARD
44 #include <asm/libata-portmap.h>
45 #else
46 #include <asm-generic/libata-portmap.h>
47 #endif
48
49 /*
50 * compile-time options: to be removed as soon as all the drivers are
51 * converted to the new debugging mechanism
52 */
53 #undef ATA_DEBUG /* debugging output */
54 #undef ATA_VERBOSE_DEBUG /* yet more debugging output */
55 #undef ATA_IRQ_TRAP /* define to ack screaming irqs */
56 #undef ATA_NDEBUG /* define to disable quick runtime checks */
57 #define ATA_ENABLE_PATA /* define to enable PATA support in some
58 * low-level drivers */
59
60
61 /* note: prints function name for you */
62 #ifdef ATA_DEBUG
63 #define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
64 #ifdef ATA_VERBOSE_DEBUG
65 #define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
66 #else
67 #define VPRINTK(fmt, args...)
68 #endif /* ATA_VERBOSE_DEBUG */
69 #else
70 #define DPRINTK(fmt, args...)
71 #define VPRINTK(fmt, args...)
72 #endif /* ATA_DEBUG */
73
74 #define BPRINTK(fmt, args...) if (ap->flags & ATA_FLAG_DEBUGMSG) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
75
76 /* NEW: debug levels */
77 #define HAVE_LIBATA_MSG 1
78
79 enum {
80 ATA_MSG_DRV = 0x0001,
81 ATA_MSG_INFO = 0x0002,
82 ATA_MSG_PROBE = 0x0004,
83 ATA_MSG_WARN = 0x0008,
84 ATA_MSG_MALLOC = 0x0010,
85 ATA_MSG_CTL = 0x0020,
86 ATA_MSG_INTR = 0x0040,
87 ATA_MSG_ERR = 0x0080,
88 };
89
90 #define ata_msg_drv(p) ((p)->msg_enable & ATA_MSG_DRV)
91 #define ata_msg_info(p) ((p)->msg_enable & ATA_MSG_INFO)
92 #define ata_msg_probe(p) ((p)->msg_enable & ATA_MSG_PROBE)
93 #define ata_msg_warn(p) ((p)->msg_enable & ATA_MSG_WARN)
94 #define ata_msg_malloc(p) ((p)->msg_enable & ATA_MSG_MALLOC)
95 #define ata_msg_ctl(p) ((p)->msg_enable & ATA_MSG_CTL)
96 #define ata_msg_intr(p) ((p)->msg_enable & ATA_MSG_INTR)
97 #define ata_msg_err(p) ((p)->msg_enable & ATA_MSG_ERR)
98
99 static inline u32 ata_msg_init(int dval, int default_msg_enable_bits)
100 {
101 if (dval < 0 || dval >= (sizeof(u32) * 8))
102 return default_msg_enable_bits; /* should be 0x1 - only driver info msgs */
103 if (!dval)
104 return 0;
105 return (1 << dval) - 1;
106 }
107
108 /* defines only for the constants which don't work well as enums */
109 #define ATA_TAG_POISON 0xfafbfcfdU
110
111 /* move to PCI layer? */
112 #define PCI_VDEVICE(vendor, device) \
113 PCI_VENDOR_ID_##vendor, (device), \
114 PCI_ANY_ID, PCI_ANY_ID, 0, 0
115
116 static inline struct device *pci_dev_to_dev(struct pci_dev *pdev)
117 {
118 return &pdev->dev;
119 }
120
121 enum {
122 /* various global constants */
123 LIBATA_MAX_PRD = ATA_MAX_PRD / 2,
124 ATA_MAX_PORTS = 8,
125 ATA_DEF_QUEUE = 1,
126 /* tag ATA_MAX_QUEUE - 1 is reserved for internal commands */
127 ATA_MAX_QUEUE = 32,
128 ATA_TAG_INTERNAL = ATA_MAX_QUEUE - 1,
129 ATA_MAX_BUS = 2,
130 ATA_DEF_BUSY_WAIT = 10000,
131 ATA_SHORT_PAUSE = (HZ >> 6) + 1,
132
133 ATA_SHT_EMULATED = 1,
134 ATA_SHT_CMD_PER_LUN = 1,
135 ATA_SHT_THIS_ID = -1,
136 ATA_SHT_USE_CLUSTERING = 1,
137
138 /* struct ata_device stuff */
139 ATA_DFLAG_LBA = (1 << 0), /* device supports LBA */
140 ATA_DFLAG_LBA48 = (1 << 1), /* device supports LBA48 */
141 ATA_DFLAG_CDB_INTR = (1 << 2), /* device asserts INTRQ when ready for CDB */
142 ATA_DFLAG_NCQ = (1 << 3), /* device supports NCQ */
143 ATA_DFLAG_FLUSH_EXT = (1 << 4), /* do FLUSH_EXT instead of FLUSH */
144 ATA_DFLAG_CFG_MASK = (1 << 8) - 1,
145
146 ATA_DFLAG_PIO = (1 << 8), /* device limited to PIO mode */
147 ATA_DFLAG_NCQ_OFF = (1 << 9), /* device limited to non-NCQ mode */
148 ATA_DFLAG_SUSPENDED = (1 << 10), /* device suspended */
149 ATA_DFLAG_INIT_MASK = (1 << 16) - 1,
150
151 ATA_DFLAG_DETACH = (1 << 16),
152 ATA_DFLAG_DETACHED = (1 << 17),
153
154 ATA_DEV_UNKNOWN = 0, /* unknown device */
155 ATA_DEV_ATA = 1, /* ATA device */
156 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */
157 ATA_DEV_ATAPI = 3, /* ATAPI device */
158 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */
159 ATA_DEV_NONE = 5, /* no device */
160
161 /* struct ata_port flags */
162 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */
163 /* (doesn't imply presence) */
164 ATA_FLAG_SATA = (1 << 1),
165 ATA_FLAG_NO_LEGACY = (1 << 2), /* no legacy mode check */
166 ATA_FLAG_MMIO = (1 << 3), /* use MMIO, not PIO */
167 ATA_FLAG_SRST = (1 << 4), /* (obsolete) use ATA SRST, not E.D.D. */
168 ATA_FLAG_SATA_RESET = (1 << 5), /* (obsolete) use COMRESET */
169 ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */
170 ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */
171 ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */
172 ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD
173 * doesn't handle PIO interrupts */
174 ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */
175 ATA_FLAG_HRST_TO_RESUME = (1 << 11), /* hardreset to resume phy */
176 ATA_FLAG_SKIP_D2H_BSY = (1 << 12), /* can't wait for the first D2H
177 * Register FIS clearing BSY */
178 ATA_FLAG_DEBUGMSG = (1 << 13),
179 ATA_FLAG_SETXFER_POLLING= (1 << 14), /* use polling for SETXFER */
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
198 ATA_PFLAG_FLUSH_PORT_TASK = (1 << 16), /* flush port task */
199 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */
200 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */
201
202 /* struct ata_queued_cmd flags */
203 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */
204 ATA_QCFLAG_SG = (1 << 1), /* have s/g table? */
205 ATA_QCFLAG_SINGLE = (1 << 2), /* no s/g, just a single buffer */
206 ATA_QCFLAG_DMAMAP = ATA_QCFLAG_SG | ATA_QCFLAG_SINGLE,
207 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */
208 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */
209
210 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */
211 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */
212 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */
213
214 /* host set flags */
215 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */
216
217 /* various lengths of time */
218 ATA_TMOUT_BOOT = 30 * HZ, /* heuristic */
219 ATA_TMOUT_BOOT_QUICK = 7 * HZ, /* heuristic */
220 ATA_TMOUT_INTERNAL = 30 * HZ,
221 ATA_TMOUT_INTERNAL_QUICK = 5 * HZ,
222
223 /* ATA bus states */
224 BUS_UNKNOWN = 0,
225 BUS_DMA = 1,
226 BUS_IDLE = 2,
227 BUS_NOINTR = 3,
228 BUS_NODATA = 4,
229 BUS_TIMER = 5,
230 BUS_PIO = 6,
231 BUS_EDD = 7,
232 BUS_IDENTIFY = 8,
233 BUS_PACKET = 9,
234
235 /* SATA port states */
236 PORT_UNKNOWN = 0,
237 PORT_ENABLED = 1,
238 PORT_DISABLED = 2,
239
240 /* encoding various smaller bitmaps into a single
241 * unsigned int bitmap
242 */
243 ATA_BITS_PIO = 7,
244 ATA_BITS_MWDMA = 5,
245 ATA_BITS_UDMA = 8,
246
247 ATA_SHIFT_PIO = 0,
248 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_BITS_PIO,
249 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_BITS_MWDMA,
250
251 ATA_MASK_PIO = ((1 << ATA_BITS_PIO) - 1) << ATA_SHIFT_PIO,
252 ATA_MASK_MWDMA = ((1 << ATA_BITS_MWDMA) - 1) << ATA_SHIFT_MWDMA,
253 ATA_MASK_UDMA = ((1 << ATA_BITS_UDMA) - 1) << ATA_SHIFT_UDMA,
254
255 /* size of buffer to pad xfers ending on unaligned boundaries */
256 ATA_DMA_PAD_SZ = 4,
257 ATA_DMA_PAD_BUF_SZ = ATA_DMA_PAD_SZ * ATA_MAX_QUEUE,
258
259 /* masks for port functions */
260 ATA_PORT_PRIMARY = (1 << 0),
261 ATA_PORT_SECONDARY = (1 << 1),
262
263 /* ering size */
264 ATA_ERING_SIZE = 32,
265
266 /* desc_len for ata_eh_info and context */
267 ATA_EH_DESC_LEN = 80,
268
269 /* reset / recovery action types */
270 ATA_EH_REVALIDATE = (1 << 0),
271 ATA_EH_SOFTRESET = (1 << 1),
272 ATA_EH_HARDRESET = (1 << 2),
273 ATA_EH_SUSPEND = (1 << 3),
274 ATA_EH_RESUME = (1 << 4),
275 ATA_EH_PM_FREEZE = (1 << 5),
276
277 ATA_EH_RESET_MASK = ATA_EH_SOFTRESET | ATA_EH_HARDRESET,
278 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE | ATA_EH_SUSPEND |
279 ATA_EH_RESUME | ATA_EH_PM_FREEZE,
280
281 /* ata_eh_info->flags */
282 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */
283 ATA_EHI_RESUME_LINK = (1 << 1), /* resume link (reset modifier) */
284 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */
285 ATA_EHI_QUIET = (1 << 3), /* be quiet */
286
287 ATA_EHI_DID_RESET = (1 << 16), /* already reset this port */
288 ATA_EHI_PRINTINFO = (1 << 17), /* print configuration info */
289 ATA_EHI_SETMODE = (1 << 18), /* configure transfer mode */
290 ATA_EHI_POST_SETMODE = (1 << 19), /* revaildating after setmode */
291
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_RESET_TRIES = 3,
300 ATA_EH_DEV_TRIES = 3,
301
302 /* Drive spinup time (time from power-on to the first D2H FIS)
303 * in msecs - 8s currently. Failing to get ready in this time
304 * isn't critical. It will result in reset failure for
305 * controllers which can't wait for the first D2H FIS. libata
306 * will retry, so it just has to be long enough to spin up
307 * most devices.
308 */
309 ATA_SPINUP_WAIT = 8000,
310
311 /* Horkage types. May be set by libata or controller on drives
312 (some horkage may be drive/controller pair dependant */
313
314 ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */
315 ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */
316 ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */
317 };
318
319 enum hsm_task_states {
320 HSM_ST_IDLE, /* no command on going */
321 HSM_ST, /* (waiting the device to) transfer data */
322 HSM_ST_LAST, /* (waiting the device to) complete command */
323 HSM_ST_ERR, /* error */
324 HSM_ST_FIRST, /* (waiting the device to)
325 write CDB or first data block */
326 };
327
328 enum ata_completion_errors {
329 AC_ERR_DEV = (1 << 0), /* device reported error */
330 AC_ERR_HSM = (1 << 1), /* host state machine violation */
331 AC_ERR_TIMEOUT = (1 << 2), /* timeout */
332 AC_ERR_MEDIA = (1 << 3), /* media error */
333 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */
334 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */
335 AC_ERR_SYSTEM = (1 << 6), /* system error */
336 AC_ERR_INVALID = (1 << 7), /* invalid argument */
337 AC_ERR_OTHER = (1 << 8), /* unknown */
338 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */
339 };
340
341 /* forward declarations */
342 struct scsi_device;
343 struct ata_port_operations;
344 struct ata_port;
345 struct ata_queued_cmd;
346
347 /* typedefs */
348 typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
349 typedef int (*ata_prereset_fn_t)(struct ata_port *ap);
350 typedef int (*ata_reset_fn_t)(struct ata_port *ap, unsigned int *classes);
351 typedef void (*ata_postreset_fn_t)(struct ata_port *ap, unsigned int *classes);
352
353 struct ata_ioports {
354 unsigned long cmd_addr;
355 unsigned long data_addr;
356 unsigned long error_addr;
357 unsigned long feature_addr;
358 unsigned long nsect_addr;
359 unsigned long lbal_addr;
360 unsigned long lbam_addr;
361 unsigned long lbah_addr;
362 unsigned long device_addr;
363 unsigned long status_addr;
364 unsigned long command_addr;
365 unsigned long altstatus_addr;
366 unsigned long ctl_addr;
367 unsigned long bmdma_addr;
368 unsigned long scr_addr;
369 };
370
371 struct ata_probe_ent {
372 struct list_head node;
373 struct device *dev;
374 const struct ata_port_operations *port_ops;
375 struct scsi_host_template *sht;
376 struct ata_ioports port[ATA_MAX_PORTS];
377 unsigned int n_ports;
378 unsigned int dummy_port_mask;
379 unsigned int pio_mask;
380 unsigned int mwdma_mask;
381 unsigned int udma_mask;
382 unsigned long irq;
383 unsigned long irq2;
384 unsigned int irq_flags;
385 unsigned long port_flags;
386 unsigned long _host_flags;
387 void __iomem *mmio_base;
388 void *private_data;
389
390 /* port_info for the secondary port. Together with irq2, it's
391 * used to implement non-uniform secondary port. Currently,
392 * the only user is ata_piix combined mode. This workaround
393 * will be removed together with ata_probe_ent when init model
394 * is updated.
395 */
396 const struct ata_port_info *pinfo2;
397 };
398
399 struct ata_host {
400 spinlock_t lock;
401 struct device *dev;
402 unsigned long irq;
403 unsigned long irq2;
404 void __iomem *mmio_base;
405 unsigned int n_ports;
406 void *private_data;
407 const struct ata_port_operations *ops;
408 unsigned long flags;
409 int simplex_claimed; /* Keep seperate in case we
410 ever need to do this locked */
411 struct ata_port *ports[0];
412 };
413
414 struct ata_queued_cmd {
415 struct ata_port *ap;
416 struct ata_device *dev;
417
418 struct scsi_cmnd *scsicmd;
419 void (*scsidone)(struct scsi_cmnd *);
420
421 struct ata_taskfile tf;
422 u8 cdb[ATAPI_CDB_LEN];
423
424 unsigned long flags; /* ATA_QCFLAG_xxx */
425 unsigned int tag;
426 unsigned int n_elem;
427 unsigned int orig_n_elem;
428
429 int dma_dir;
430
431 unsigned int pad_len;
432
433 unsigned int nsect;
434 unsigned int cursect;
435
436 unsigned int nbytes;
437 unsigned int curbytes;
438
439 unsigned int cursg;
440 unsigned int cursg_ofs;
441
442 struct scatterlist sgent;
443 struct scatterlist pad_sgent;
444 void *buf_virt;
445
446 /* DO NOT iterate over __sg manually, use ata_for_each_sg() */
447 struct scatterlist *__sg;
448
449 unsigned int err_mask;
450 struct ata_taskfile result_tf;
451 ata_qc_cb_t complete_fn;
452
453 void *private_data;
454 };
455
456 struct ata_port_stats {
457 unsigned long unhandled_irq;
458 unsigned long idle_irq;
459 unsigned long rw_reqbuf;
460 };
461
462 struct ata_ering_entry {
463 int is_io;
464 unsigned int err_mask;
465 u64 timestamp;
466 };
467
468 struct ata_ering {
469 int cursor;
470 struct ata_ering_entry ring[ATA_ERING_SIZE];
471 };
472
473 struct ata_device {
474 struct ata_port *ap;
475 unsigned int devno; /* 0 or 1 */
476 unsigned long flags; /* ATA_DFLAG_xxx */
477 struct scsi_device *sdev; /* attached SCSI device */
478 /* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */
479 u64 n_sectors; /* size of device, if ATA */
480 unsigned int class; /* ATA_DEV_xxx */
481 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
482 u8 pio_mode;
483 u8 dma_mode;
484 u8 xfer_mode;
485 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
486
487 unsigned int multi_count; /* sectors count for
488 READ/WRITE MULTIPLE */
489 unsigned int max_sectors; /* per-device max sectors */
490 unsigned int cdb_len;
491
492 /* per-dev xfer mask */
493 unsigned int pio_mask;
494 unsigned int mwdma_mask;
495 unsigned int udma_mask;
496
497 /* for CHS addressing */
498 u16 cylinders; /* Number of cylinders */
499 u16 heads; /* Number of heads */
500 u16 sectors; /* Number of sectors per track */
501
502 /* error history */
503 struct ata_ering ering;
504 unsigned int horkage; /* List of broken features */
505 };
506
507 /* Offset into struct ata_device. Fields above it are maintained
508 * acress device init. Fields below are zeroed.
509 */
510 #define ATA_DEVICE_CLEAR_OFFSET offsetof(struct ata_device, n_sectors)
511
512 struct ata_eh_info {
513 struct ata_device *dev; /* offending device */
514 u32 serror; /* SError from LLDD */
515 unsigned int err_mask; /* port-wide err_mask */
516 unsigned int action; /* ATA_EH_* action mask */
517 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */
518 unsigned int flags; /* ATA_EHI_* flags */
519
520 unsigned long hotplug_timestamp;
521 unsigned int probe_mask;
522
523 char desc[ATA_EH_DESC_LEN];
524 int desc_len;
525 };
526
527 struct ata_eh_context {
528 struct ata_eh_info i;
529 int tries[ATA_MAX_DEVICES];
530 unsigned int classes[ATA_MAX_DEVICES];
531 unsigned int did_probe_mask;
532 };
533
534 struct ata_port {
535 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */
536 const struct ata_port_operations *ops;
537 spinlock_t *lock;
538 unsigned long flags; /* ATA_FLAG_xxx */
539 unsigned int pflags; /* ATA_PFLAG_xxx */
540 unsigned int id; /* unique id req'd by scsi midlyr */
541 unsigned int port_no; /* unique port #; from zero */
542
543 struct ata_prd *prd; /* our SG list */
544 dma_addr_t prd_dma; /* and its DMA mapping */
545
546 void *pad; /* array of DMA pad buffers */
547 dma_addr_t pad_dma;
548
549 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
550
551 u8 ctl; /* cache of ATA control register */
552 u8 last_ctl; /* Cache last written value */
553 unsigned int pio_mask;
554 unsigned int mwdma_mask;
555 unsigned int udma_mask;
556 unsigned int cbl; /* cable type; ATA_CBL_xxx */
557 unsigned int hw_sata_spd_limit;
558 unsigned int sata_spd_limit; /* SATA PHY speed limit */
559
560 /* record runtime error info, protected by host lock */
561 struct ata_eh_info eh_info;
562 /* EH context owned by EH */
563 struct ata_eh_context eh_context;
564
565 struct ata_device device[ATA_MAX_DEVICES];
566
567 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
568 unsigned long qc_allocated;
569 unsigned int qc_active;
570
571 unsigned int active_tag;
572 u32 sactive;
573
574 struct ata_port_stats stats;
575 struct ata_host *host;
576 struct device *dev;
577
578 struct work_struct port_task;
579 struct work_struct hotplug_task;
580 struct work_struct scsi_rescan_task;
581
582 unsigned int hsm_task_state;
583
584 u32 msg_enable;
585 struct list_head eh_done_q;
586 wait_queue_head_t eh_wait_q;
587
588 pm_message_t pm_mesg;
589 int *pm_result;
590
591 void *private_data;
592
593 u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */
594 };
595
596 struct ata_port_operations {
597 void (*port_disable) (struct ata_port *);
598
599 void (*dev_config) (struct ata_port *, struct ata_device *);
600
601 void (*set_piomode) (struct ata_port *, struct ata_device *);
602 void (*set_dmamode) (struct ata_port *, struct ata_device *);
603 unsigned long (*mode_filter) (const struct ata_port *, struct ata_device *, unsigned long);
604
605 void (*tf_load) (struct ata_port *ap, const struct ata_taskfile *tf);
606 void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf);
607
608 void (*exec_command)(struct ata_port *ap, const struct ata_taskfile *tf);
609 u8 (*check_status)(struct ata_port *ap);
610 u8 (*check_altstatus)(struct ata_port *ap);
611 void (*dev_select)(struct ata_port *ap, unsigned int device);
612
613 void (*phy_reset) (struct ata_port *ap); /* obsolete */
614 void (*set_mode) (struct ata_port *ap);
615
616 void (*post_set_mode) (struct ata_port *ap);
617
618 int (*check_atapi_dma) (struct ata_queued_cmd *qc);
619
620 void (*bmdma_setup) (struct ata_queued_cmd *qc);
621 void (*bmdma_start) (struct ata_queued_cmd *qc);
622
623 void (*data_xfer) (struct ata_device *, unsigned char *, unsigned int, int);
624
625 void (*qc_prep) (struct ata_queued_cmd *qc);
626 unsigned int (*qc_issue) (struct ata_queued_cmd *qc);
627
628 /* Error handlers. ->error_handler overrides ->eng_timeout and
629 * indicates that new-style EH is in place.
630 */
631 void (*eng_timeout) (struct ata_port *ap); /* obsolete */
632
633 void (*freeze) (struct ata_port *ap);
634 void (*thaw) (struct ata_port *ap);
635 void (*error_handler) (struct ata_port *ap);
636 void (*post_internal_cmd) (struct ata_queued_cmd *qc);
637
638 irq_handler_t irq_handler;
639 void (*irq_clear) (struct ata_port *);
640
641 u32 (*scr_read) (struct ata_port *ap, unsigned int sc_reg);
642 void (*scr_write) (struct ata_port *ap, unsigned int sc_reg,
643 u32 val);
644
645 int (*port_suspend) (struct ata_port *ap, pm_message_t mesg);
646 int (*port_resume) (struct ata_port *ap);
647
648 int (*port_start) (struct ata_port *ap);
649 void (*port_stop) (struct ata_port *ap);
650
651 void (*host_stop) (struct ata_host *host);
652
653 void (*bmdma_stop) (struct ata_queued_cmd *qc);
654 u8 (*bmdma_status) (struct ata_port *ap);
655 };
656
657 struct ata_port_info {
658 struct scsi_host_template *sht;
659 unsigned long flags;
660 unsigned long pio_mask;
661 unsigned long mwdma_mask;
662 unsigned long udma_mask;
663 const struct ata_port_operations *port_ops;
664 void *private_data;
665 };
666
667 struct ata_timing {
668 unsigned short mode; /* ATA mode */
669 unsigned short setup; /* t1 */
670 unsigned short act8b; /* t2 for 8-bit I/O */
671 unsigned short rec8b; /* t2i for 8-bit I/O */
672 unsigned short cyc8b; /* t0 for 8-bit I/O */
673 unsigned short active; /* t2 or tD */
674 unsigned short recover; /* t2i or tK */
675 unsigned short cycle; /* t0 */
676 unsigned short udma; /* t2CYCTYP/2 */
677 };
678
679 #define FIT(v,vmin,vmax) max_t(short,min_t(short,v,vmax),vmin)
680
681 extern const unsigned long sata_deb_timing_normal[];
682 extern const unsigned long sata_deb_timing_hotplug[];
683 extern const unsigned long sata_deb_timing_long[];
684
685 extern const struct ata_port_operations ata_dummy_port_ops;
686
687 static inline const unsigned long *
688 sata_ehc_deb_timing(struct ata_eh_context *ehc)
689 {
690 if (ehc->i.flags & ATA_EHI_HOTPLUGGED)
691 return sata_deb_timing_hotplug;
692 else
693 return sata_deb_timing_normal;
694 }
695
696 static inline int ata_port_is_dummy(struct ata_port *ap)
697 {
698 return ap->ops == &ata_dummy_port_ops;
699 }
700
701 extern void ata_port_probe(struct ata_port *);
702 extern void __sata_phy_reset(struct ata_port *ap);
703 extern void sata_phy_reset(struct ata_port *ap);
704 extern void ata_bus_reset(struct ata_port *ap);
705 extern int sata_set_spd(struct ata_port *ap);
706 extern int sata_phy_debounce(struct ata_port *ap, const unsigned long *param);
707 extern int sata_phy_resume(struct ata_port *ap, const unsigned long *param);
708 extern int ata_std_prereset(struct ata_port *ap);
709 extern int ata_std_softreset(struct ata_port *ap, unsigned int *classes);
710 extern int sata_port_hardreset(struct ata_port *ap,
711 const unsigned long *timing);
712 extern int sata_std_hardreset(struct ata_port *ap, unsigned int *class);
713 extern void ata_std_postreset(struct ata_port *ap, unsigned int *classes);
714 extern void ata_port_disable(struct ata_port *);
715 extern void ata_std_ports(struct ata_ioports *ioaddr);
716 #ifdef CONFIG_PCI
717 extern int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info,
718 unsigned int n_ports);
719 extern void ata_pci_remove_one (struct pci_dev *pdev);
720 extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg);
721 extern void ata_pci_device_do_resume(struct pci_dev *pdev);
722 extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
723 extern int ata_pci_device_resume(struct pci_dev *pdev);
724 extern int ata_pci_clear_simplex(struct pci_dev *pdev);
725 #endif /* CONFIG_PCI */
726 extern int ata_device_add(const struct ata_probe_ent *ent);
727 extern void ata_port_detach(struct ata_port *ap);
728 extern void ata_host_init(struct ata_host *, struct device *,
729 unsigned long, const struct ata_port_operations *);
730 extern void ata_host_remove(struct ata_host *host);
731 extern int ata_scsi_detect(struct scsi_host_template *sht);
732 extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
733 extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *));
734 extern int ata_scsi_release(struct Scsi_Host *host);
735 extern void ata_sas_port_destroy(struct ata_port *);
736 extern struct ata_port *ata_sas_port_alloc(struct ata_host *,
737 struct ata_port_info *, struct Scsi_Host *);
738 extern int ata_sas_port_init(struct ata_port *);
739 extern int ata_sas_port_start(struct ata_port *ap);
740 extern void ata_sas_port_stop(struct ata_port *ap);
741 extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *);
742 extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
743 struct ata_port *ap);
744 extern unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc);
745 extern int sata_scr_valid(struct ata_port *ap);
746 extern int sata_scr_read(struct ata_port *ap, int reg, u32 *val);
747 extern int sata_scr_write(struct ata_port *ap, int reg, u32 val);
748 extern int sata_scr_write_flush(struct ata_port *ap, int reg, u32 val);
749 extern int ata_port_online(struct ata_port *ap);
750 extern int ata_port_offline(struct ata_port *ap);
751 extern int ata_scsi_device_resume(struct scsi_device *);
752 extern int ata_scsi_device_suspend(struct scsi_device *, pm_message_t mesg);
753 extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg);
754 extern void ata_host_resume(struct ata_host *host);
755 extern int ata_ratelimit(void);
756 extern int ata_busy_sleep(struct ata_port *ap,
757 unsigned long timeout_pat, unsigned long timeout);
758 extern void ata_port_queue_task(struct ata_port *ap, void (*fn)(void *),
759 void *data, unsigned long delay);
760 extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
761 unsigned long interval_msec,
762 unsigned long timeout_msec);
763
764 /*
765 * Default driver ops implementations
766 */
767 extern void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
768 extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
769 extern void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp);
770 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
771 extern void ata_noop_dev_select (struct ata_port *ap, unsigned int device);
772 extern void ata_std_dev_select (struct ata_port *ap, unsigned int device);
773 extern u8 ata_check_status(struct ata_port *ap);
774 extern u8 ata_altstatus(struct ata_port *ap);
775 extern void ata_exec_command(struct ata_port *ap, const struct ata_taskfile *tf);
776 extern int ata_port_start (struct ata_port *ap);
777 extern void ata_port_stop (struct ata_port *ap);
778 extern void ata_host_stop (struct ata_host *host);
779 extern irqreturn_t ata_interrupt (int irq, void *dev_instance);
780 extern void ata_mmio_data_xfer(struct ata_device *adev, unsigned char *buf,
781 unsigned int buflen, int write_data);
782 extern void ata_pio_data_xfer(struct ata_device *adev, unsigned char *buf,
783 unsigned int buflen, int write_data);
784 extern void ata_pio_data_xfer_noirq(struct ata_device *adev, unsigned char *buf,
785 unsigned int buflen, int write_data);
786 extern void ata_qc_prep(struct ata_queued_cmd *qc);
787 extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
788 extern unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc);
789 extern void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf,
790 unsigned int buflen);
791 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
792 unsigned int n_elem);
793 extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
794 extern void ata_id_string(const u16 *id, unsigned char *s,
795 unsigned int ofs, unsigned int len);
796 extern void ata_id_c_string(const u16 *id, unsigned char *s,
797 unsigned int ofs, unsigned int len);
798 extern unsigned long ata_device_blacklisted(const struct ata_device *dev);
799 extern void ata_bmdma_setup (struct ata_queued_cmd *qc);
800 extern void ata_bmdma_start (struct ata_queued_cmd *qc);
801 extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
802 extern u8 ata_bmdma_status(struct ata_port *ap);
803 extern void ata_bmdma_irq_clear(struct ata_port *ap);
804 extern void ata_bmdma_freeze(struct ata_port *ap);
805 extern void ata_bmdma_thaw(struct ata_port *ap);
806 extern void ata_bmdma_drive_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
807 ata_reset_fn_t softreset,
808 ata_reset_fn_t hardreset,
809 ata_postreset_fn_t postreset);
810 extern void ata_bmdma_error_handler(struct ata_port *ap);
811 extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc);
812 extern int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
813 u8 status, int in_wq);
814 extern void ata_qc_complete(struct ata_queued_cmd *qc);
815 extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active,
816 void (*finish_qc)(struct ata_queued_cmd *));
817 extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
818 void (*done)(struct scsi_cmnd *));
819 extern int ata_std_bios_param(struct scsi_device *sdev,
820 struct block_device *bdev,
821 sector_t capacity, int geom[]);
822 extern int ata_scsi_slave_config(struct scsi_device *sdev);
823 extern void ata_scsi_slave_destroy(struct scsi_device *sdev);
824 extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
825 int queue_depth);
826 extern struct ata_device *ata_dev_pair(struct ata_device *adev);
827
828 /*
829 * Timing helpers
830 */
831
832 extern unsigned int ata_pio_need_iordy(const struct ata_device *);
833 extern int ata_timing_compute(struct ata_device *, unsigned short,
834 struct ata_timing *, int, int);
835 extern void ata_timing_merge(const struct ata_timing *,
836 const struct ata_timing *, struct ata_timing *,
837 unsigned int);
838
839 enum {
840 ATA_TIMING_SETUP = (1 << 0),
841 ATA_TIMING_ACT8B = (1 << 1),
842 ATA_TIMING_REC8B = (1 << 2),
843 ATA_TIMING_CYC8B = (1 << 3),
844 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
845 ATA_TIMING_CYC8B,
846 ATA_TIMING_ACTIVE = (1 << 4),
847 ATA_TIMING_RECOVER = (1 << 5),
848 ATA_TIMING_CYCLE = (1 << 6),
849 ATA_TIMING_UDMA = (1 << 7),
850 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
851 ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
852 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
853 ATA_TIMING_CYCLE | ATA_TIMING_UDMA,
854 };
855
856
857 #ifdef CONFIG_PCI
858 struct pci_bits {
859 unsigned int reg; /* PCI config register to read */
860 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
861 unsigned long mask;
862 unsigned long val;
863 };
864
865 extern void ata_pci_host_stop (struct ata_host *host);
866 extern struct ata_probe_ent *
867 ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port, int portmask);
868 extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
869 extern unsigned long ata_pci_default_filter(const struct ata_port *, struct ata_device *, unsigned long);
870 #endif /* CONFIG_PCI */
871
872 /*
873 * EH
874 */
875 extern void ata_eng_timeout(struct ata_port *ap);
876
877 extern void ata_port_schedule_eh(struct ata_port *ap);
878 extern int ata_port_abort(struct ata_port *ap);
879 extern int ata_port_freeze(struct ata_port *ap);
880
881 extern void ata_eh_freeze_port(struct ata_port *ap);
882 extern void ata_eh_thaw_port(struct ata_port *ap);
883
884 extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
885 extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
886
887 extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
888 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
889 ata_postreset_fn_t postreset);
890
891 /*
892 * printk helpers
893 */
894 #define ata_port_printk(ap, lv, fmt, args...) \
895 printk(lv"ata%u: "fmt, (ap)->id , ##args)
896
897 #define ata_dev_printk(dev, lv, fmt, args...) \
898 printk(lv"ata%u.%02u: "fmt, (dev)->ap->id, (dev)->devno , ##args)
899
900 /*
901 * ata_eh_info helpers
902 */
903 #define ata_ehi_push_desc(ehi, fmt, args...) do { \
904 (ehi)->desc_len += scnprintf((ehi)->desc + (ehi)->desc_len, \
905 ATA_EH_DESC_LEN - (ehi)->desc_len, \
906 fmt , ##args); \
907 } while (0)
908
909 #define ata_ehi_clear_desc(ehi) do { \
910 (ehi)->desc[0] = '\0'; \
911 (ehi)->desc_len = 0; \
912 } while (0)
913
914 static inline void __ata_ehi_hotplugged(struct ata_eh_info *ehi)
915 {
916 if (ehi->flags & ATA_EHI_HOTPLUGGED)
917 return;
918
919 ehi->flags |= ATA_EHI_HOTPLUGGED | ATA_EHI_RESUME_LINK;
920 ehi->hotplug_timestamp = jiffies;
921
922 ehi->action |= ATA_EH_SOFTRESET;
923 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
924 }
925
926 static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
927 {
928 __ata_ehi_hotplugged(ehi);
929 ehi->err_mask |= AC_ERR_ATA_BUS;
930 }
931
932 /*
933 * qc helpers
934 */
935 static inline int
936 ata_sg_is_last(struct scatterlist *sg, struct ata_queued_cmd *qc)
937 {
938 if (sg == &qc->pad_sgent)
939 return 1;
940 if (qc->pad_len)
941 return 0;
942 if (((sg - qc->__sg) + 1) == qc->n_elem)
943 return 1;
944 return 0;
945 }
946
947 static inline struct scatterlist *
948 ata_qc_first_sg(struct ata_queued_cmd *qc)
949 {
950 if (qc->n_elem)
951 return qc->__sg;
952 if (qc->pad_len)
953 return &qc->pad_sgent;
954 return NULL;
955 }
956
957 static inline struct scatterlist *
958 ata_qc_next_sg(struct scatterlist *sg, struct ata_queued_cmd *qc)
959 {
960 if (sg == &qc->pad_sgent)
961 return NULL;
962 if (++sg - qc->__sg < qc->n_elem)
963 return sg;
964 if (qc->pad_len)
965 return &qc->pad_sgent;
966 return NULL;
967 }
968
969 #define ata_for_each_sg(sg, qc) \
970 for (sg = ata_qc_first_sg(qc); sg; sg = ata_qc_next_sg(sg, qc))
971
972 static inline unsigned int ata_tag_valid(unsigned int tag)
973 {
974 return (tag < ATA_MAX_QUEUE) ? 1 : 0;
975 }
976
977 static inline unsigned int ata_tag_internal(unsigned int tag)
978 {
979 return tag == ATA_MAX_QUEUE - 1;
980 }
981
982 /*
983 * device helpers
984 */
985 static inline unsigned int ata_class_enabled(unsigned int class)
986 {
987 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI;
988 }
989
990 static inline unsigned int ata_class_disabled(unsigned int class)
991 {
992 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP;
993 }
994
995 static inline unsigned int ata_class_absent(unsigned int class)
996 {
997 return !ata_class_enabled(class) && !ata_class_disabled(class);
998 }
999
1000 static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
1001 {
1002 return ata_class_enabled(dev->class);
1003 }
1004
1005 static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
1006 {
1007 return ata_class_disabled(dev->class);
1008 }
1009
1010 static inline unsigned int ata_dev_absent(const struct ata_device *dev)
1011 {
1012 return ata_class_absent(dev->class);
1013 }
1014
1015 static inline unsigned int ata_dev_ready(const struct ata_device *dev)
1016 {
1017 return ata_dev_enabled(dev) && !(dev->flags & ATA_DFLAG_SUSPENDED);
1018 }
1019
1020 /*
1021 * port helpers
1022 */
1023 static inline int ata_port_max_devices(const struct ata_port *ap)
1024 {
1025 if (ap->flags & ATA_FLAG_SLAVE_POSS)
1026 return 2;
1027 return 1;
1028 }
1029
1030
1031 static inline u8 ata_chk_status(struct ata_port *ap)
1032 {
1033 return ap->ops->check_status(ap);
1034 }
1035
1036
1037 /**
1038 * ata_pause - Flush writes and pause 400 nanoseconds.
1039 * @ap: Port to wait for.
1040 *
1041 * LOCKING:
1042 * Inherited from caller.
1043 */
1044
1045 static inline void ata_pause(struct ata_port *ap)
1046 {
1047 ata_altstatus(ap);
1048 ndelay(400);
1049 }
1050
1051
1052 /**
1053 * ata_busy_wait - Wait for a port status register
1054 * @ap: Port to wait for.
1055 *
1056 * Waits up to max*10 microseconds for the selected bits in the port's
1057 * status register to be cleared.
1058 * Returns final value of status register.
1059 *
1060 * LOCKING:
1061 * Inherited from caller.
1062 */
1063
1064 static inline u8 ata_busy_wait(struct ata_port *ap, unsigned int bits,
1065 unsigned int max)
1066 {
1067 u8 status;
1068
1069 do {
1070 udelay(10);
1071 status = ata_chk_status(ap);
1072 max--;
1073 } while (status != 0xff && (status & bits) && (max > 0));
1074
1075 return status;
1076 }
1077
1078
1079 /**
1080 * ata_wait_idle - Wait for a port to be idle.
1081 * @ap: Port to wait for.
1082 *
1083 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
1084 * Returns final value of status register.
1085 *
1086 * LOCKING:
1087 * Inherited from caller.
1088 */
1089
1090 static inline u8 ata_wait_idle(struct ata_port *ap)
1091 {
1092 u8 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
1093
1094 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ))) {
1095 unsigned long l = ap->ioaddr.status_addr;
1096 if (ata_msg_warn(ap))
1097 printk(KERN_WARNING "ATA: abnormal status 0x%X on port 0x%lX\n",
1098 status, l);
1099 }
1100
1101 return status;
1102 }
1103
1104 static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
1105 {
1106 qc->tf.ctl |= ATA_NIEN;
1107 }
1108
1109 static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap,
1110 unsigned int tag)
1111 {
1112 if (likely(ata_tag_valid(tag)))
1113 return &ap->qcmd[tag];
1114 return NULL;
1115 }
1116
1117 static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap,
1118 unsigned int tag)
1119 {
1120 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
1121
1122 if (unlikely(!qc) || !ap->ops->error_handler)
1123 return qc;
1124
1125 if ((qc->flags & (ATA_QCFLAG_ACTIVE |
1126 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE)
1127 return qc;
1128
1129 return NULL;
1130 }
1131
1132 static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
1133 {
1134 memset(tf, 0, sizeof(*tf));
1135
1136 tf->ctl = dev->ap->ctl;
1137 if (dev->devno == 0)
1138 tf->device = ATA_DEVICE_OBS;
1139 else
1140 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
1141 }
1142
1143 static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
1144 {
1145 qc->__sg = NULL;
1146 qc->flags = 0;
1147 qc->cursect = qc->cursg = qc->cursg_ofs = 0;
1148 qc->nsect = 0;
1149 qc->nbytes = qc->curbytes = 0;
1150 qc->err_mask = 0;
1151
1152 ata_tf_init(qc->dev, &qc->tf);
1153
1154 /* init result_tf such that it indicates normal completion */
1155 qc->result_tf.command = ATA_DRDY;
1156 qc->result_tf.feature = 0;
1157 }
1158
1159 /**
1160 * ata_irq_ack - Acknowledge a device interrupt.
1161 * @ap: Port on which interrupts are enabled.
1162 *
1163 * Wait up to 10 ms for legacy IDE device to become idle (BUSY
1164 * or BUSY+DRQ clear). Obtain dma status and port status from
1165 * device. Clear the interrupt. Return port status.
1166 *
1167 * LOCKING:
1168 */
1169
1170 static inline u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq)
1171 {
1172 unsigned int bits = chk_drq ? ATA_BUSY | ATA_DRQ : ATA_BUSY;
1173 u8 host_stat, post_stat, status;
1174
1175 status = ata_busy_wait(ap, bits, 1000);
1176 if (status & bits)
1177 if (ata_msg_err(ap))
1178 printk(KERN_ERR "abnormal status 0x%X\n", status);
1179
1180 /* get controller status; clear intr, err bits */
1181 if (ap->flags & ATA_FLAG_MMIO) {
1182 void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr;
1183 host_stat = readb(mmio + ATA_DMA_STATUS);
1184 writeb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR,
1185 mmio + ATA_DMA_STATUS);
1186
1187 post_stat = readb(mmio + ATA_DMA_STATUS);
1188 } else {
1189 host_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
1190 outb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR,
1191 ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
1192
1193 post_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
1194 }
1195
1196 if (ata_msg_intr(ap))
1197 printk(KERN_INFO "%s: irq ack: host_stat 0x%X, new host_stat 0x%X, drv_stat 0x%X\n",
1198 __FUNCTION__,
1199 host_stat, post_stat, status);
1200
1201 return status;
1202 }
1203
1204 static inline int ata_try_flush_cache(const struct ata_device *dev)
1205 {
1206 return ata_id_wcache_enabled(dev->id) ||
1207 ata_id_has_flush(dev->id) ||
1208 ata_id_has_flush_ext(dev->id);
1209 }
1210
1211 static inline unsigned int ac_err_mask(u8 status)
1212 {
1213 if (status & (ATA_BUSY | ATA_DRQ))
1214 return AC_ERR_HSM;
1215 if (status & (ATA_ERR | ATA_DF))
1216 return AC_ERR_DEV;
1217 return 0;
1218 }
1219
1220 static inline unsigned int __ac_err_mask(u8 status)
1221 {
1222 unsigned int mask = ac_err_mask(status);
1223 if (mask == 0)
1224 return AC_ERR_OTHER;
1225 return mask;
1226 }
1227
1228 static inline int ata_pad_alloc(struct ata_port *ap, struct device *dev)
1229 {
1230 ap->pad_dma = 0;
1231 ap->pad = dma_alloc_coherent(dev, ATA_DMA_PAD_BUF_SZ,
1232 &ap->pad_dma, GFP_KERNEL);
1233 return (ap->pad == NULL) ? -ENOMEM : 0;
1234 }
1235
1236 static inline void ata_pad_free(struct ata_port *ap, struct device *dev)
1237 {
1238 dma_free_coherent(dev, ATA_DMA_PAD_BUF_SZ, ap->pad, ap->pad_dma);
1239 }
1240
1241 static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
1242 {
1243 return (struct ata_port *) &host->hostdata[0];
1244 }
1245
1246 #endif /* __LINUX_LIBATA_H__ */
Linux kernel - Deliverables
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