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[PATCH] Fix swsusp with PNP BIOS
[linux-2.6/linux-mips.git] / include / linux / libata.h
blob66c3100c2b94c19dc2eb581e000ce5fce24deb75
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 * compile-time options: to be removed as soon as all the drivers are
41 * converted to the new debugging mechanism
42 */
43 #undef ATA_DEBUG /* debugging output */
44 #undef ATA_VERBOSE_DEBUG /* yet more debugging output */
45 #undef ATA_IRQ_TRAP /* define to ack screaming irqs */
46 #undef ATA_NDEBUG /* define to disable quick runtime checks */
47 #undef ATA_ENABLE_PATA /* define to enable PATA support in some
48 * low-level drivers */
49
50
51 /* note: prints function name for you */
52 #ifdef ATA_DEBUG
53 #define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
54 #ifdef ATA_VERBOSE_DEBUG
55 #define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
56 #else
57 #define VPRINTK(fmt, args...)
58 #endif /* ATA_VERBOSE_DEBUG */
59 #else
60 #define DPRINTK(fmt, args...)
61 #define VPRINTK(fmt, args...)
62 #endif /* ATA_DEBUG */
63
64 #define BPRINTK(fmt, args...) if (ap->flags & ATA_FLAG_DEBUGMSG) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
65
66 /* NEW: debug levels */
67 #define HAVE_LIBATA_MSG 1
68
69 enum {
70 ATA_MSG_DRV = 0x0001,
71 ATA_MSG_INFO = 0x0002,
72 ATA_MSG_PROBE = 0x0004,
73 ATA_MSG_WARN = 0x0008,
74 ATA_MSG_MALLOC = 0x0010,
75 ATA_MSG_CTL = 0x0020,
76 ATA_MSG_INTR = 0x0040,
77 ATA_MSG_ERR = 0x0080,
78 };
79
80 #define ata_msg_drv(p) ((p)->msg_enable & ATA_MSG_DRV)
81 #define ata_msg_info(p) ((p)->msg_enable & ATA_MSG_INFO)
82 #define ata_msg_probe(p) ((p)->msg_enable & ATA_MSG_PROBE)
83 #define ata_msg_warn(p) ((p)->msg_enable & ATA_MSG_WARN)
84 #define ata_msg_malloc(p) ((p)->msg_enable & ATA_MSG_MALLOC)
85 #define ata_msg_ctl(p) ((p)->msg_enable & ATA_MSG_CTL)
86 #define ata_msg_intr(p) ((p)->msg_enable & ATA_MSG_INTR)
87 #define ata_msg_err(p) ((p)->msg_enable & ATA_MSG_ERR)
88
89 static inline u32 ata_msg_init(int dval, int default_msg_enable_bits)
90 {
91 if (dval < 0 || dval >= (sizeof(u32) * 8))
92 return default_msg_enable_bits; /* should be 0x1 - only driver info msgs */
93 if (!dval)
94 return 0;
95 return (1 << dval) - 1;
96 }
97
98 /* defines only for the constants which don't work well as enums */
99 #define ATA_TAG_POISON 0xfafbfcfdU
100
101 /* move to PCI layer? */
102 static inline struct device *pci_dev_to_dev(struct pci_dev *pdev)
103 {
104 return &pdev->dev;
105 }
106
107 enum {
108 /* various global constants */
109 LIBATA_MAX_PRD = ATA_MAX_PRD / 2,
110 ATA_MAX_PORTS = 8,
111 ATA_DEF_QUEUE = 1,
112 /* tag ATA_MAX_QUEUE - 1 is reserved for internal commands */
113 ATA_MAX_QUEUE = 32,
114 ATA_TAG_INTERNAL = ATA_MAX_QUEUE - 1,
115 ATA_MAX_SECTORS = 200, /* FIXME */
116 ATA_MAX_SECTORS_LBA48 = 65535,
117 ATA_MAX_BUS = 2,
118 ATA_DEF_BUSY_WAIT = 10000,
119 ATA_SHORT_PAUSE = (HZ >> 6) + 1,
120
121 ATA_SHT_EMULATED = 1,
122 ATA_SHT_CMD_PER_LUN = 1,
123 ATA_SHT_THIS_ID = -1,
124 ATA_SHT_USE_CLUSTERING = 1,
125
126 /* struct ata_device stuff */
127 ATA_DFLAG_LBA = (1 << 0), /* device supports LBA */
128 ATA_DFLAG_LBA48 = (1 << 1), /* device supports LBA48 */
129 ATA_DFLAG_CDB_INTR = (1 << 2), /* device asserts INTRQ when ready for CDB */
130 ATA_DFLAG_NCQ = (1 << 3), /* device supports NCQ */
131 ATA_DFLAG_CFG_MASK = (1 << 8) - 1,
132
133 ATA_DFLAG_PIO = (1 << 8), /* device currently in PIO mode */
134 ATA_DFLAG_SUSPENDED = (1 << 9), /* device suspended */
135 ATA_DFLAG_INIT_MASK = (1 << 16) - 1,
136
137 ATA_DFLAG_DETACH = (1 << 16),
138 ATA_DFLAG_DETACHED = (1 << 17),
139
140 ATA_DEV_UNKNOWN = 0, /* unknown device */
141 ATA_DEV_ATA = 1, /* ATA device */
142 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */
143 ATA_DEV_ATAPI = 3, /* ATAPI device */
144 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */
145 ATA_DEV_NONE = 5, /* no device */
146
147 /* struct ata_port flags */
148 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */
149 /* (doesn't imply presence) */
150 ATA_FLAG_SATA = (1 << 1),
151 ATA_FLAG_NO_LEGACY = (1 << 2), /* no legacy mode check */
152 ATA_FLAG_MMIO = (1 << 3), /* use MMIO, not PIO */
153 ATA_FLAG_SRST = (1 << 4), /* (obsolete) use ATA SRST, not E.D.D. */
154 ATA_FLAG_SATA_RESET = (1 << 5), /* (obsolete) use COMRESET */
155 ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */
156 ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */
157 ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */
158 ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD
159 * doesn't handle PIO interrupts */
160 ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */
161 ATA_FLAG_HRST_TO_RESUME = (1 << 11), /* hardreset to resume phy */
162 ATA_FLAG_SKIP_D2H_BSY = (1 << 12), /* can't wait for the first D2H
163 * Register FIS clearing BSY */
164 ATA_FLAG_DEBUGMSG = (1 << 13),
165
166 /* The following flag belongs to ap->pflags but is kept in
167 * ap->flags because it's referenced in many LLDs and will be
168 * removed in not-too-distant future.
169 */
170 ATA_FLAG_DISABLED = (1 << 23), /* port is disabled, ignore it */
171
172 /* bits 24:31 of ap->flags are reserved for LLD specific flags */
173
174 /* struct ata_port pflags */
175 ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */
176 ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */
177 ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */
178 ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */
179 ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */
180 ATA_PFLAG_UNLOADING = (1 << 5), /* module is unloading */
181 ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */
182
183 ATA_PFLAG_FLUSH_PORT_TASK = (1 << 16), /* flush port task */
184 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */
185 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */
186
187 /* struct ata_queued_cmd flags */
188 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */
189 ATA_QCFLAG_SG = (1 << 1), /* have s/g table? */
190 ATA_QCFLAG_SINGLE = (1 << 2), /* no s/g, just a single buffer */
191 ATA_QCFLAG_DMAMAP = ATA_QCFLAG_SG | ATA_QCFLAG_SINGLE,
192 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */
193 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */
194
195 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */
196 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */
197 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */
198
199 /* host set flags */
200 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host_set only */
201
202 /* various lengths of time */
203 ATA_TMOUT_BOOT = 30 * HZ, /* heuristic */
204 ATA_TMOUT_BOOT_QUICK = 7 * HZ, /* heuristic */
205 ATA_TMOUT_INTERNAL = 30 * HZ,
206 ATA_TMOUT_INTERNAL_QUICK = 5 * HZ,
207
208 /* ATA bus states */
209 BUS_UNKNOWN = 0,
210 BUS_DMA = 1,
211 BUS_IDLE = 2,
212 BUS_NOINTR = 3,
213 BUS_NODATA = 4,
214 BUS_TIMER = 5,
215 BUS_PIO = 6,
216 BUS_EDD = 7,
217 BUS_IDENTIFY = 8,
218 BUS_PACKET = 9,
219
220 /* SATA port states */
221 PORT_UNKNOWN = 0,
222 PORT_ENABLED = 1,
223 PORT_DISABLED = 2,
224
225 /* encoding various smaller bitmaps into a single
226 * unsigned int bitmap
227 */
228 ATA_BITS_PIO = 5,
229 ATA_BITS_MWDMA = 3,
230 ATA_BITS_UDMA = 8,
231
232 ATA_SHIFT_PIO = 0,
233 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_BITS_PIO,
234 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_BITS_MWDMA,
235
236 ATA_MASK_PIO = ((1 << ATA_BITS_PIO) - 1) << ATA_SHIFT_PIO,
237 ATA_MASK_MWDMA = ((1 << ATA_BITS_MWDMA) - 1) << ATA_SHIFT_MWDMA,
238 ATA_MASK_UDMA = ((1 << ATA_BITS_UDMA) - 1) << ATA_SHIFT_UDMA,
239
240 /* size of buffer to pad xfers ending on unaligned boundaries */
241 ATA_DMA_PAD_SZ = 4,
242 ATA_DMA_PAD_BUF_SZ = ATA_DMA_PAD_SZ * ATA_MAX_QUEUE,
243
244 /* masks for port functions */
245 ATA_PORT_PRIMARY = (1 << 0),
246 ATA_PORT_SECONDARY = (1 << 1),
247
248 /* ering size */
249 ATA_ERING_SIZE = 32,
250
251 /* desc_len for ata_eh_info and context */
252 ATA_EH_DESC_LEN = 80,
253
254 /* reset / recovery action types */
255 ATA_EH_REVALIDATE = (1 << 0),
256 ATA_EH_SOFTRESET = (1 << 1),
257 ATA_EH_HARDRESET = (1 << 2),
258 ATA_EH_SUSPEND = (1 << 3),
259 ATA_EH_RESUME = (1 << 4),
260 ATA_EH_PM_FREEZE = (1 << 5),
261
262 ATA_EH_RESET_MASK = ATA_EH_SOFTRESET | ATA_EH_HARDRESET,
263 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE | ATA_EH_SUSPEND |
264 ATA_EH_RESUME | ATA_EH_PM_FREEZE,
265
266 /* ata_eh_info->flags */
267 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */
268 ATA_EHI_RESUME_LINK = (1 << 1), /* resume link (reset modifier) */
269 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */
270 ATA_EHI_QUIET = (1 << 3), /* be quiet */
271
272 ATA_EHI_DID_RESET = (1 << 16), /* already reset this port */
273
274 ATA_EHI_RESET_MODIFIER_MASK = ATA_EHI_RESUME_LINK,
275
276 /* max repeat if error condition is still set after ->error_handler */
277 ATA_EH_MAX_REPEAT = 5,
278
279 /* how hard are we gonna try to probe/recover devices */
280 ATA_PROBE_MAX_TRIES = 3,
281 ATA_EH_RESET_TRIES = 3,
282 ATA_EH_DEV_TRIES = 3,
283
284 /* Drive spinup time (time from power-on to the first D2H FIS)
285 * in msecs - 8s currently. Failing to get ready in this time
286 * isn't critical. It will result in reset failure for
287 * controllers which can't wait for the first D2H FIS. libata
288 * will retry, so it just has to be long enough to spin up
289 * most devices.
290 */
291 ATA_SPINUP_WAIT = 8000,
292 };
293
294 enum hsm_task_states {
295 HSM_ST_UNKNOWN, /* state unknown */
296 HSM_ST_IDLE, /* no command on going */
297 HSM_ST, /* (waiting the device to) transfer data */
298 HSM_ST_LAST, /* (waiting the device to) complete command */
299 HSM_ST_ERR, /* error */
300 HSM_ST_FIRST, /* (waiting the device to)
301 write CDB or first data block */
302 };
303
304 enum ata_completion_errors {
305 AC_ERR_DEV = (1 << 0), /* device reported error */
306 AC_ERR_HSM = (1 << 1), /* host state machine violation */
307 AC_ERR_TIMEOUT = (1 << 2), /* timeout */
308 AC_ERR_MEDIA = (1 << 3), /* media error */
309 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */
310 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */
311 AC_ERR_SYSTEM = (1 << 6), /* system error */
312 AC_ERR_INVALID = (1 << 7), /* invalid argument */
313 AC_ERR_OTHER = (1 << 8), /* unknown */
314 };
315
316 /* forward declarations */
317 struct scsi_device;
318 struct ata_port_operations;
319 struct ata_port;
320 struct ata_queued_cmd;
321
322 /* typedefs */
323 typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
324 typedef int (*ata_prereset_fn_t)(struct ata_port *ap);
325 typedef int (*ata_reset_fn_t)(struct ata_port *ap, unsigned int *classes);
326 typedef void (*ata_postreset_fn_t)(struct ata_port *ap, unsigned int *classes);
327
328 struct ata_ioports {
329 unsigned long cmd_addr;
330 unsigned long data_addr;
331 unsigned long error_addr;
332 unsigned long feature_addr;
333 unsigned long nsect_addr;
334 unsigned long lbal_addr;
335 unsigned long lbam_addr;
336 unsigned long lbah_addr;
337 unsigned long device_addr;
338 unsigned long status_addr;
339 unsigned long command_addr;
340 unsigned long altstatus_addr;
341 unsigned long ctl_addr;
342 unsigned long bmdma_addr;
343 unsigned long scr_addr;
344 };
345
346 struct ata_probe_ent {
347 struct list_head node;
348 struct device *dev;
349 const struct ata_port_operations *port_ops;
350 struct scsi_host_template *sht;
351 struct ata_ioports port[ATA_MAX_PORTS];
352 unsigned int n_ports;
353 unsigned int hard_port_no;
354 unsigned int pio_mask;
355 unsigned int mwdma_mask;
356 unsigned int udma_mask;
357 unsigned int legacy_mode;
358 unsigned long irq;
359 unsigned int irq_flags;
360 unsigned long host_flags;
361 unsigned long host_set_flags;
362 void __iomem *mmio_base;
363 void *private_data;
364 };
365
366 struct ata_host_set {
367 spinlock_t lock;
368 struct device *dev;
369 unsigned long irq;
370 void __iomem *mmio_base;
371 unsigned int n_ports;
372 void *private_data;
373 const struct ata_port_operations *ops;
374 unsigned long flags;
375 int simplex_claimed; /* Keep seperate in case we
376 ever need to do this locked */
377 struct ata_host_set *next; /* for legacy mode */
378 struct ata_port *ports[0];
379 };
380
381 struct ata_queued_cmd {
382 struct ata_port *ap;
383 struct ata_device *dev;
384
385 struct scsi_cmnd *scsicmd;
386 void (*scsidone)(struct scsi_cmnd *);
387
388 struct ata_taskfile tf;
389 u8 cdb[ATAPI_CDB_LEN];
390
391 unsigned long flags; /* ATA_QCFLAG_xxx */
392 unsigned int tag;
393 unsigned int n_elem;
394 unsigned int orig_n_elem;
395
396 int dma_dir;
397
398 unsigned int pad_len;
399
400 unsigned int nsect;
401 unsigned int cursect;
402
403 unsigned int nbytes;
404 unsigned int curbytes;
405
406 unsigned int cursg;
407 unsigned int cursg_ofs;
408
409 struct scatterlist sgent;
410 struct scatterlist pad_sgent;
411 void *buf_virt;
412
413 /* DO NOT iterate over __sg manually, use ata_for_each_sg() */
414 struct scatterlist *__sg;
415
416 unsigned int err_mask;
417 struct ata_taskfile result_tf;
418 ata_qc_cb_t complete_fn;
419
420 void *private_data;
421 };
422
423 struct ata_host_stats {
424 unsigned long unhandled_irq;
425 unsigned long idle_irq;
426 unsigned long rw_reqbuf;
427 };
428
429 struct ata_ering_entry {
430 int is_io;
431 unsigned int err_mask;
432 u64 timestamp;
433 };
434
435 struct ata_ering {
436 int cursor;
437 struct ata_ering_entry ring[ATA_ERING_SIZE];
438 };
439
440 struct ata_device {
441 struct ata_port *ap;
442 unsigned int devno; /* 0 or 1 */
443 unsigned long flags; /* ATA_DFLAG_xxx */
444 struct scsi_device *sdev; /* attached SCSI device */
445 /* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */
446 u64 n_sectors; /* size of device, if ATA */
447 unsigned int class; /* ATA_DEV_xxx */
448 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
449 u8 pio_mode;
450 u8 dma_mode;
451 u8 xfer_mode;
452 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
453
454 unsigned int multi_count; /* sectors count for
455 READ/WRITE MULTIPLE */
456 unsigned int max_sectors; /* per-device max sectors */
457 unsigned int cdb_len;
458
459 /* per-dev xfer mask */
460 unsigned int pio_mask;
461 unsigned int mwdma_mask;
462 unsigned int udma_mask;
463
464 /* for CHS addressing */
465 u16 cylinders; /* Number of cylinders */
466 u16 heads; /* Number of heads */
467 u16 sectors; /* Number of sectors per track */
468
469 /* error history */
470 struct ata_ering ering;
471 };
472
473 /* Offset into struct ata_device. Fields above it are maintained
474 * acress device init. Fields below are zeroed.
475 */
476 #define ATA_DEVICE_CLEAR_OFFSET offsetof(struct ata_device, n_sectors)
477
478 struct ata_eh_info {
479 struct ata_device *dev; /* offending device */
480 u32 serror; /* SError from LLDD */
481 unsigned int err_mask; /* port-wide err_mask */
482 unsigned int action; /* ATA_EH_* action mask */
483 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */
484 unsigned int flags; /* ATA_EHI_* flags */
485
486 unsigned long hotplug_timestamp;
487 unsigned int probe_mask;
488
489 char desc[ATA_EH_DESC_LEN];
490 int desc_len;
491 };
492
493 struct ata_eh_context {
494 struct ata_eh_info i;
495 int tries[ATA_MAX_DEVICES];
496 unsigned int classes[ATA_MAX_DEVICES];
497 unsigned int did_probe_mask;
498 };
499
500 struct ata_port {
501 struct Scsi_Host *host; /* our co-allocated scsi host */
502 const struct ata_port_operations *ops;
503 spinlock_t *lock;
504 unsigned long flags; /* ATA_FLAG_xxx */
505 unsigned int pflags; /* ATA_PFLAG_xxx */
506 unsigned int id; /* unique id req'd by scsi midlyr */
507 unsigned int port_no; /* unique port #; from zero */
508 unsigned int hard_port_no; /* hardware port #; from zero */
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_set 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_host_stats stats;
542 struct ata_host_set *host_set;
543 struct device *dev;
544
545 struct work_struct port_task;
546 struct work_struct hotplug_task;
547 struct work_struct scsi_rescan_task;
548
549 unsigned int hsm_task_state;
550
551 u32 msg_enable;
552 struct list_head eh_done_q;
553 wait_queue_head_t eh_wait_q;
554
555 pm_message_t pm_mesg;
556 int *pm_result;
557
558 void *private_data;
559
560 u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */
561 };
562
563 struct ata_port_operations {
564 void (*port_disable) (struct ata_port *);
565
566 void (*dev_config) (struct ata_port *, struct ata_device *);
567
568 void (*set_piomode) (struct ata_port *, struct ata_device *);
569 void (*set_dmamode) (struct ata_port *, struct ata_device *);
570 unsigned long (*mode_filter) (const struct ata_port *, struct ata_device *, unsigned long);
571
572 void (*tf_load) (struct ata_port *ap, const struct ata_taskfile *tf);
573 void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf);
574
575 void (*exec_command)(struct ata_port *ap, const struct ata_taskfile *tf);
576 u8 (*check_status)(struct ata_port *ap);
577 u8 (*check_altstatus)(struct ata_port *ap);
578 void (*dev_select)(struct ata_port *ap, unsigned int device);
579
580 void (*phy_reset) (struct ata_port *ap); /* obsolete */
581 void (*set_mode) (struct ata_port *ap);
582
583 void (*post_set_mode) (struct ata_port *ap);
584
585 int (*check_atapi_dma) (struct ata_queued_cmd *qc);
586
587 void (*bmdma_setup) (struct ata_queued_cmd *qc);
588 void (*bmdma_start) (struct ata_queued_cmd *qc);
589
590 void (*data_xfer) (struct ata_device *, unsigned char *, unsigned int, int);
591
592 void (*qc_prep) (struct ata_queued_cmd *qc);
593 unsigned int (*qc_issue) (struct ata_queued_cmd *qc);
594
595 /* Error handlers. ->error_handler overrides ->eng_timeout and
596 * indicates that new-style EH is in place.
597 */
598 void (*eng_timeout) (struct ata_port *ap); /* obsolete */
599
600 void (*freeze) (struct ata_port *ap);
601 void (*thaw) (struct ata_port *ap);
602 void (*error_handler) (struct ata_port *ap);
603 void (*post_internal_cmd) (struct ata_queued_cmd *qc);
604
605 irqreturn_t (*irq_handler)(int, void *, struct pt_regs *);
606 void (*irq_clear) (struct ata_port *);
607
608 u32 (*scr_read) (struct ata_port *ap, unsigned int sc_reg);
609 void (*scr_write) (struct ata_port *ap, unsigned int sc_reg,
610 u32 val);
611
612 int (*port_suspend) (struct ata_port *ap, pm_message_t mesg);
613 int (*port_resume) (struct ata_port *ap);
614
615 int (*port_start) (struct ata_port *ap);
616 void (*port_stop) (struct ata_port *ap);
617
618 void (*host_stop) (struct ata_host_set *host_set);
619
620 void (*bmdma_stop) (struct ata_queued_cmd *qc);
621 u8 (*bmdma_status) (struct ata_port *ap);
622 };
623
624 struct ata_port_info {
625 struct scsi_host_template *sht;
626 unsigned long host_flags;
627 unsigned long pio_mask;
628 unsigned long mwdma_mask;
629 unsigned long udma_mask;
630 const struct ata_port_operations *port_ops;
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 static inline const unsigned long *
653 sata_ehc_deb_timing(struct ata_eh_context *ehc)
654 {
655 if (ehc->i.flags & ATA_EHI_HOTPLUGGED)
656 return sata_deb_timing_hotplug;
657 else
658 return sata_deb_timing_normal;
659 }
660
661 extern void ata_port_probe(struct ata_port *);
662 extern void __sata_phy_reset(struct ata_port *ap);
663 extern void sata_phy_reset(struct ata_port *ap);
664 extern void ata_bus_reset(struct ata_port *ap);
665 extern int sata_set_spd(struct ata_port *ap);
666 extern int sata_phy_debounce(struct ata_port *ap, const unsigned long *param);
667 extern int sata_phy_resume(struct ata_port *ap, const unsigned long *param);
668 extern int ata_std_prereset(struct ata_port *ap);
669 extern int ata_std_softreset(struct ata_port *ap, unsigned int *classes);
670 extern int sata_std_hardreset(struct ata_port *ap, unsigned int *class);
671 extern void ata_std_postreset(struct ata_port *ap, unsigned int *classes);
672 extern int ata_dev_revalidate(struct ata_device *dev, int post_reset);
673 extern void ata_port_disable(struct ata_port *);
674 extern void ata_std_ports(struct ata_ioports *ioaddr);
675 #ifdef CONFIG_PCI
676 extern int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info,
677 unsigned int n_ports);
678 extern void ata_pci_remove_one (struct pci_dev *pdev);
679 extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t state);
680 extern void ata_pci_device_do_resume(struct pci_dev *pdev);
681 extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t state);
682 extern int ata_pci_device_resume(struct pci_dev *pdev);
683 extern int ata_pci_clear_simplex(struct pci_dev *pdev);
684 #endif /* CONFIG_PCI */
685 extern int ata_device_add(const struct ata_probe_ent *ent);
686 extern void ata_port_detach(struct ata_port *ap);
687 extern void ata_host_set_remove(struct ata_host_set *host_set);
688 extern int ata_scsi_detect(struct scsi_host_template *sht);
689 extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
690 extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *));
691 extern int ata_scsi_release(struct Scsi_Host *host);
692 extern unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc);
693 extern int sata_scr_valid(struct ata_port *ap);
694 extern int sata_scr_read(struct ata_port *ap, int reg, u32 *val);
695 extern int sata_scr_write(struct ata_port *ap, int reg, u32 val);
696 extern int sata_scr_write_flush(struct ata_port *ap, int reg, u32 val);
697 extern int ata_port_online(struct ata_port *ap);
698 extern int ata_port_offline(struct ata_port *ap);
699 extern int ata_scsi_device_resume(struct scsi_device *);
700 extern int ata_scsi_device_suspend(struct scsi_device *, pm_message_t state);
701 extern int ata_host_set_suspend(struct ata_host_set *host_set,
702 pm_message_t mesg);
703 extern void ata_host_set_resume(struct ata_host_set *host_set);
704 extern int ata_ratelimit(void);
705 extern unsigned int ata_busy_sleep(struct ata_port *ap,
706 unsigned long timeout_pat,
707 unsigned long timeout);
708 extern void ata_port_queue_task(struct ata_port *ap, void (*fn)(void *),
709 void *data, unsigned long delay);
710 extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
711 unsigned long interval_msec,
712 unsigned long timeout_msec);
713
714 /*
715 * Default driver ops implementations
716 */
717 extern void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
718 extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
719 extern void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp);
720 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
721 extern void ata_noop_dev_select (struct ata_port *ap, unsigned int device);
722 extern void ata_std_dev_select (struct ata_port *ap, unsigned int device);
723 extern u8 ata_check_status(struct ata_port *ap);
724 extern u8 ata_altstatus(struct ata_port *ap);
725 extern void ata_exec_command(struct ata_port *ap, const struct ata_taskfile *tf);
726 extern int ata_port_start (struct ata_port *ap);
727 extern void ata_port_stop (struct ata_port *ap);
728 extern void ata_host_stop (struct ata_host_set *host_set);
729 extern irqreturn_t ata_interrupt (int irq, void *dev_instance, struct pt_regs *regs);
730 extern void ata_mmio_data_xfer(struct ata_device *adev, unsigned char *buf,
731 unsigned int buflen, int write_data);
732 extern void ata_pio_data_xfer(struct ata_device *adev, unsigned char *buf,
733 unsigned int buflen, int write_data);
734 extern void ata_pio_data_xfer_noirq(struct ata_device *adev, unsigned char *buf,
735 unsigned int buflen, int write_data);
736 extern void ata_qc_prep(struct ata_queued_cmd *qc);
737 extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
738 extern unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc);
739 extern void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf,
740 unsigned int buflen);
741 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
742 unsigned int n_elem);
743 extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
744 extern void ata_id_string(const u16 *id, unsigned char *s,
745 unsigned int ofs, unsigned int len);
746 extern void ata_id_c_string(const u16 *id, unsigned char *s,
747 unsigned int ofs, unsigned int len);
748 extern void ata_bmdma_setup (struct ata_queued_cmd *qc);
749 extern void ata_bmdma_start (struct ata_queued_cmd *qc);
750 extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
751 extern u8 ata_bmdma_status(struct ata_port *ap);
752 extern void ata_bmdma_irq_clear(struct ata_port *ap);
753 extern void ata_bmdma_freeze(struct ata_port *ap);
754 extern void ata_bmdma_thaw(struct ata_port *ap);
755 extern void ata_bmdma_drive_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
756 ata_reset_fn_t softreset,
757 ata_reset_fn_t hardreset,
758 ata_postreset_fn_t postreset);
759 extern void ata_bmdma_error_handler(struct ata_port *ap);
760 extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc);
761 extern int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
762 u8 status, int in_wq);
763 extern void ata_qc_complete(struct ata_queued_cmd *qc);
764 extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active,
765 void (*finish_qc)(struct ata_queued_cmd *));
766 extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
767 void (*done)(struct scsi_cmnd *));
768 extern int ata_std_bios_param(struct scsi_device *sdev,
769 struct block_device *bdev,
770 sector_t capacity, int geom[]);
771 extern int ata_scsi_slave_config(struct scsi_device *sdev);
772 extern void ata_scsi_slave_destroy(struct scsi_device *sdev);
773 extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
774 int queue_depth);
775 extern struct ata_device *ata_dev_pair(struct ata_device *adev);
776
777 /*
778 * Timing helpers
779 */
780
781 extern unsigned int ata_pio_need_iordy(const struct ata_device *);
782 extern int ata_timing_compute(struct ata_device *, unsigned short,
783 struct ata_timing *, int, int);
784 extern void ata_timing_merge(const struct ata_timing *,
785 const struct ata_timing *, struct ata_timing *,
786 unsigned int);
787
788 enum {
789 ATA_TIMING_SETUP = (1 << 0),
790 ATA_TIMING_ACT8B = (1 << 1),
791 ATA_TIMING_REC8B = (1 << 2),
792 ATA_TIMING_CYC8B = (1 << 3),
793 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
794 ATA_TIMING_CYC8B,
795 ATA_TIMING_ACTIVE = (1 << 4),
796 ATA_TIMING_RECOVER = (1 << 5),
797 ATA_TIMING_CYCLE = (1 << 6),
798 ATA_TIMING_UDMA = (1 << 7),
799 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
800 ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
801 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
802 ATA_TIMING_CYCLE | ATA_TIMING_UDMA,
803 };
804
805
806 #ifdef CONFIG_PCI
807 struct pci_bits {
808 unsigned int reg; /* PCI config register to read */
809 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
810 unsigned long mask;
811 unsigned long val;
812 };
813
814 extern void ata_pci_host_stop (struct ata_host_set *host_set);
815 extern struct ata_probe_ent *
816 ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port, int portmask);
817 extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
818 extern unsigned long ata_pci_default_filter(const struct ata_port *, struct ata_device *, unsigned long);
819 #endif /* CONFIG_PCI */
820
821 /*
822 * EH
823 */
824 extern void ata_eng_timeout(struct ata_port *ap);
825
826 extern void ata_port_schedule_eh(struct ata_port *ap);
827 extern int ata_port_abort(struct ata_port *ap);
828 extern int ata_port_freeze(struct ata_port *ap);
829
830 extern void ata_eh_freeze_port(struct ata_port *ap);
831 extern void ata_eh_thaw_port(struct ata_port *ap);
832
833 extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
834 extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
835
836 extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
837 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
838 ata_postreset_fn_t postreset);
839
840 /*
841 * printk helpers
842 */
843 #define ata_port_printk(ap, lv, fmt, args...) \
844 printk(lv"ata%u: "fmt, (ap)->id , ##args)
845
846 #define ata_dev_printk(dev, lv, fmt, args...) \
847 printk(lv"ata%u.%02u: "fmt, (dev)->ap->id, (dev)->devno , ##args)
848
849 /*
850 * ata_eh_info helpers
851 */
852 #define ata_ehi_push_desc(ehi, fmt, args...) do { \
853 (ehi)->desc_len += scnprintf((ehi)->desc + (ehi)->desc_len, \
854 ATA_EH_DESC_LEN - (ehi)->desc_len, \
855 fmt , ##args); \
856 } while (0)
857
858 #define ata_ehi_clear_desc(ehi) do { \
859 (ehi)->desc[0] = '\0'; \
860 (ehi)->desc_len = 0; \
861 } while (0)
862
863 static inline void __ata_ehi_hotplugged(struct ata_eh_info *ehi)
864 {
865 if (ehi->flags & ATA_EHI_HOTPLUGGED)
866 return;
867
868 ehi->flags |= ATA_EHI_HOTPLUGGED | ATA_EHI_RESUME_LINK;
869 ehi->hotplug_timestamp = jiffies;
870
871 ehi->action |= ATA_EH_SOFTRESET;
872 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
873 }
874
875 static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
876 {
877 __ata_ehi_hotplugged(ehi);
878 ehi->err_mask |= AC_ERR_ATA_BUS;
879 }
880
881 /*
882 * qc helpers
883 */
884 static inline int
885 ata_sg_is_last(struct scatterlist *sg, struct ata_queued_cmd *qc)
886 {
887 if (sg == &qc->pad_sgent)
888 return 1;
889 if (qc->pad_len)
890 return 0;
891 if (((sg - qc->__sg) + 1) == qc->n_elem)
892 return 1;
893 return 0;
894 }
895
896 static inline struct scatterlist *
897 ata_qc_first_sg(struct ata_queued_cmd *qc)
898 {
899 if (qc->n_elem)
900 return qc->__sg;
901 if (qc->pad_len)
902 return &qc->pad_sgent;
903 return NULL;
904 }
905
906 static inline struct scatterlist *
907 ata_qc_next_sg(struct scatterlist *sg, struct ata_queued_cmd *qc)
908 {
909 if (sg == &qc->pad_sgent)
910 return NULL;
911 if (++sg - qc->__sg < qc->n_elem)
912 return sg;
913 if (qc->pad_len)
914 return &qc->pad_sgent;
915 return NULL;
916 }
917
918 #define ata_for_each_sg(sg, qc) \
919 for (sg = ata_qc_first_sg(qc); sg; sg = ata_qc_next_sg(sg, qc))
920
921 static inline unsigned int ata_tag_valid(unsigned int tag)
922 {
923 return (tag < ATA_MAX_QUEUE) ? 1 : 0;
924 }
925
926 static inline unsigned int ata_tag_internal(unsigned int tag)
927 {
928 return tag == ATA_MAX_QUEUE - 1;
929 }
930
931 /*
932 * device helpers
933 */
934 static inline unsigned int ata_class_enabled(unsigned int class)
935 {
936 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI;
937 }
938
939 static inline unsigned int ata_class_disabled(unsigned int class)
940 {
941 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP;
942 }
943
944 static inline unsigned int ata_class_absent(unsigned int class)
945 {
946 return !ata_class_enabled(class) && !ata_class_disabled(class);
947 }
948
949 static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
950 {
951 return ata_class_enabled(dev->class);
952 }
953
954 static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
955 {
956 return ata_class_disabled(dev->class);
957 }
958
959 static inline unsigned int ata_dev_absent(const struct ata_device *dev)
960 {
961 return ata_class_absent(dev->class);
962 }
963
964 static inline unsigned int ata_dev_ready(const struct ata_device *dev)
965 {
966 return ata_dev_enabled(dev) && !(dev->flags & ATA_DFLAG_SUSPENDED);
967 }
968
969 /*
970 * port helpers
971 */
972 static inline int ata_port_max_devices(const struct ata_port *ap)
973 {
974 if (ap->flags & ATA_FLAG_SLAVE_POSS)
975 return 2;
976 return 1;
977 }
978
979
980 static inline u8 ata_chk_status(struct ata_port *ap)
981 {
982 return ap->ops->check_status(ap);
983 }
984
985
986 /**
987 * ata_pause - Flush writes and pause 400 nanoseconds.
988 * @ap: Port to wait for.
989 *
990 * LOCKING:
991 * Inherited from caller.
992 */
993
994 static inline void ata_pause(struct ata_port *ap)
995 {
996 ata_altstatus(ap);
997 ndelay(400);
998 }
999
1000
1001 /**
1002 * ata_busy_wait - Wait for a port status register
1003 * @ap: Port to wait for.
1004 *
1005 * Waits up to max*10 microseconds for the selected bits in the port's
1006 * status register to be cleared.
1007 * Returns final value of status register.
1008 *
1009 * LOCKING:
1010 * Inherited from caller.
1011 */
1012
1013 static inline u8 ata_busy_wait(struct ata_port *ap, unsigned int bits,
1014 unsigned int max)
1015 {
1016 u8 status;
1017
1018 do {
1019 udelay(10);
1020 status = ata_chk_status(ap);
1021 max--;
1022 } while ((status & bits) && (max > 0));
1023
1024 return status;
1025 }
1026
1027
1028 /**
1029 * ata_wait_idle - Wait for a port to be idle.
1030 * @ap: Port to wait for.
1031 *
1032 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
1033 * Returns final value of status register.
1034 *
1035 * LOCKING:
1036 * Inherited from caller.
1037 */
1038
1039 static inline u8 ata_wait_idle(struct ata_port *ap)
1040 {
1041 u8 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
1042
1043 if (status & (ATA_BUSY | ATA_DRQ)) {
1044 unsigned long l = ap->ioaddr.status_addr;
1045 if (ata_msg_warn(ap))
1046 printk(KERN_WARNING "ATA: abnormal status 0x%X on port 0x%lX\n",
1047 status, l);
1048 }
1049
1050 return status;
1051 }
1052
1053 static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
1054 {
1055 qc->tf.ctl |= ATA_NIEN;
1056 }
1057
1058 static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap,
1059 unsigned int tag)
1060 {
1061 if (likely(ata_tag_valid(tag)))
1062 return &ap->qcmd[tag];
1063 return NULL;
1064 }
1065
1066 static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap,
1067 unsigned int tag)
1068 {
1069 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
1070
1071 if (unlikely(!qc) || !ap->ops->error_handler)
1072 return qc;
1073
1074 if ((qc->flags & (ATA_QCFLAG_ACTIVE |
1075 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE)
1076 return qc;
1077
1078 return NULL;
1079 }
1080
1081 static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
1082 {
1083 memset(tf, 0, sizeof(*tf));
1084
1085 tf->ctl = dev->ap->ctl;
1086 if (dev->devno == 0)
1087 tf->device = ATA_DEVICE_OBS;
1088 else
1089 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
1090 }
1091
1092 static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
1093 {
1094 qc->__sg = NULL;
1095 qc->flags = 0;
1096 qc->cursect = qc->cursg = qc->cursg_ofs = 0;
1097 qc->nsect = 0;
1098 qc->nbytes = qc->curbytes = 0;
1099 qc->err_mask = 0;
1100
1101 ata_tf_init(qc->dev, &qc->tf);
1102
1103 /* init result_tf such that it indicates normal completion */
1104 qc->result_tf.command = ATA_DRDY;
1105 qc->result_tf.feature = 0;
1106 }
1107
1108 /**
1109 * ata_irq_on - Enable interrupts on a port.
1110 * @ap: Port on which interrupts are enabled.
1111 *
1112 * Enable interrupts on a legacy IDE device using MMIO or PIO,
1113 * wait for idle, clear any pending interrupts.
1114 *
1115 * LOCKING:
1116 * Inherited from caller.
1117 */
1118
1119 static inline u8 ata_irq_on(struct ata_port *ap)
1120 {
1121 struct ata_ioports *ioaddr = &ap->ioaddr;
1122 u8 tmp;
1123
1124 ap->ctl &= ~ATA_NIEN;
1125 ap->last_ctl = ap->ctl;
1126
1127 if (ap->flags & ATA_FLAG_MMIO)
1128 writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr);
1129 else
1130 outb(ap->ctl, ioaddr->ctl_addr);
1131 tmp = ata_wait_idle(ap);
1132
1133 ap->ops->irq_clear(ap);
1134
1135 return tmp;
1136 }
1137
1138
1139 /**
1140 * ata_irq_ack - Acknowledge a device interrupt.
1141 * @ap: Port on which interrupts are enabled.
1142 *
1143 * Wait up to 10 ms for legacy IDE device to become idle (BUSY
1144 * or BUSY+DRQ clear). Obtain dma status and port status from
1145 * device. Clear the interrupt. Return port status.
1146 *
1147 * LOCKING:
1148 */
1149
1150 static inline u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq)
1151 {
1152 unsigned int bits = chk_drq ? ATA_BUSY | ATA_DRQ : ATA_BUSY;
1153 u8 host_stat, post_stat, status;
1154
1155 status = ata_busy_wait(ap, bits, 1000);
1156 if (status & bits)
1157 if (ata_msg_err(ap))
1158 printk(KERN_ERR "abnormal status 0x%X\n", status);
1159
1160 /* get controller status; clear intr, err bits */
1161 if (ap->flags & ATA_FLAG_MMIO) {
1162 void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr;
1163 host_stat = readb(mmio + ATA_DMA_STATUS);
1164 writeb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR,
1165 mmio + ATA_DMA_STATUS);
1166
1167 post_stat = readb(mmio + ATA_DMA_STATUS);
1168 } else {
1169 host_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
1170 outb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR,
1171 ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
1172
1173 post_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
1174 }
1175
1176 if (ata_msg_intr(ap))
1177 printk(KERN_INFO "%s: irq ack: host_stat 0x%X, new host_stat 0x%X, drv_stat 0x%X\n",
1178 __FUNCTION__,
1179 host_stat, post_stat, status);
1180
1181 return status;
1182 }
1183
1184 static inline int ata_try_flush_cache(const struct ata_device *dev)
1185 {
1186 return ata_id_wcache_enabled(dev->id) ||
1187 ata_id_has_flush(dev->id) ||
1188 ata_id_has_flush_ext(dev->id);
1189 }
1190
1191 static inline unsigned int ac_err_mask(u8 status)
1192 {
1193 if (status & (ATA_BUSY | ATA_DRQ))
1194 return AC_ERR_HSM;
1195 if (status & (ATA_ERR | ATA_DF))
1196 return AC_ERR_DEV;
1197 return 0;
1198 }
1199
1200 static inline unsigned int __ac_err_mask(u8 status)
1201 {
1202 unsigned int mask = ac_err_mask(status);
1203 if (mask == 0)
1204 return AC_ERR_OTHER;
1205 return mask;
1206 }
1207
1208 static inline int ata_pad_alloc(struct ata_port *ap, struct device *dev)
1209 {
1210 ap->pad_dma = 0;
1211 ap->pad = dma_alloc_coherent(dev, ATA_DMA_PAD_BUF_SZ,
1212 &ap->pad_dma, GFP_KERNEL);
1213 return (ap->pad == NULL) ? -ENOMEM : 0;
1214 }
1215
1216 static inline void ata_pad_free(struct ata_port *ap, struct device *dev)
1217 {
1218 dma_free_coherent(dev, ATA_DMA_PAD_BUF_SZ, ap->pad, ap->pad_dma);
1219 }
1220
1221 static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
1222 {
1223 return (struct ata_port *) &host->hostdata[0];
1224 }
1225
1226 #endif /* __LINUX_LIBATA_H__ */
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