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Merge branch 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik...
[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 * 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), /* need to resume link */
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 /* max repeat if error condition is still set after ->error_handler */
275 ATA_EH_MAX_REPEAT = 5,
276
277 /* how hard are we gonna try to probe/recover devices */
278 ATA_PROBE_MAX_TRIES = 3,
279 ATA_EH_RESET_TRIES = 3,
280 ATA_EH_DEV_TRIES = 3,
281
282 /* Drive spinup time (time from power-on to the first D2H FIS)
283 * in msecs - 8s currently. Failing to get ready in this time
284 * isn't critical. It will result in reset failure for
285 * controllers which can't wait for the first D2H FIS. libata
286 * will retry, so it just has to be long enough to spin up
287 * most devices.
288 */
289 ATA_SPINUP_WAIT = 8000,
290 };
291
292 enum hsm_task_states {
293 HSM_ST_UNKNOWN, /* state unknown */
294 HSM_ST_IDLE, /* no command on going */
295 HSM_ST, /* (waiting the device to) transfer data */
296 HSM_ST_LAST, /* (waiting the device to) complete command */
297 HSM_ST_ERR, /* error */
298 HSM_ST_FIRST, /* (waiting the device to)
299 write CDB or first data block */
300 };
301
302 enum ata_completion_errors {
303 AC_ERR_DEV = (1 << 0), /* device reported error */
304 AC_ERR_HSM = (1 << 1), /* host state machine violation */
305 AC_ERR_TIMEOUT = (1 << 2), /* timeout */
306 AC_ERR_MEDIA = (1 << 3), /* media error */
307 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */
308 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */
309 AC_ERR_SYSTEM = (1 << 6), /* system error */
310 AC_ERR_INVALID = (1 << 7), /* invalid argument */
311 AC_ERR_OTHER = (1 << 8), /* unknown */
312 };
313
314 /* forward declarations */
315 struct scsi_device;
316 struct ata_port_operations;
317 struct ata_port;
318 struct ata_queued_cmd;
319
320 /* typedefs */
321 typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
322 typedef int (*ata_prereset_fn_t)(struct ata_port *ap);
323 typedef int (*ata_reset_fn_t)(struct ata_port *ap, unsigned int *classes);
324 typedef void (*ata_postreset_fn_t)(struct ata_port *ap, unsigned int *classes);
325
326 struct ata_ioports {
327 unsigned long cmd_addr;
328 unsigned long data_addr;
329 unsigned long error_addr;
330 unsigned long feature_addr;
331 unsigned long nsect_addr;
332 unsigned long lbal_addr;
333 unsigned long lbam_addr;
334 unsigned long lbah_addr;
335 unsigned long device_addr;
336 unsigned long status_addr;
337 unsigned long command_addr;
338 unsigned long altstatus_addr;
339 unsigned long ctl_addr;
340 unsigned long bmdma_addr;
341 unsigned long scr_addr;
342 };
343
344 struct ata_probe_ent {
345 struct list_head node;
346 struct device *dev;
347 const struct ata_port_operations *port_ops;
348 struct scsi_host_template *sht;
349 struct ata_ioports port[ATA_MAX_PORTS];
350 unsigned int n_ports;
351 unsigned int hard_port_no;
352 unsigned int pio_mask;
353 unsigned int mwdma_mask;
354 unsigned int udma_mask;
355 unsigned int legacy_mode;
356 unsigned long irq;
357 unsigned int irq_flags;
358 unsigned long host_flags;
359 unsigned long host_set_flags;
360 void __iomem *mmio_base;
361 void *private_data;
362 };
363
364 struct ata_host_set {
365 spinlock_t lock;
366 struct device *dev;
367 unsigned long irq;
368 void __iomem *mmio_base;
369 unsigned int n_ports;
370 void *private_data;
371 const struct ata_port_operations *ops;
372 unsigned long flags;
373 int simplex_claimed; /* Keep seperate in case we
374 ever need to do this locked */
375 struct ata_host_set *next; /* for legacy mode */
376 struct ata_port *ports[0];
377 };
378
379 struct ata_queued_cmd {
380 struct ata_port *ap;
381 struct ata_device *dev;
382
383 struct scsi_cmnd *scsicmd;
384 void (*scsidone)(struct scsi_cmnd *);
385
386 struct ata_taskfile tf;
387 u8 cdb[ATAPI_CDB_LEN];
388
389 unsigned long flags; /* ATA_QCFLAG_xxx */
390 unsigned int tag;
391 unsigned int n_elem;
392 unsigned int orig_n_elem;
393
394 int dma_dir;
395
396 unsigned int pad_len;
397
398 unsigned int nsect;
399 unsigned int cursect;
400
401 unsigned int nbytes;
402 unsigned int curbytes;
403
404 unsigned int cursg;
405 unsigned int cursg_ofs;
406
407 struct scatterlist sgent;
408 struct scatterlist pad_sgent;
409 void *buf_virt;
410
411 /* DO NOT iterate over __sg manually, use ata_for_each_sg() */
412 struct scatterlist *__sg;
413
414 unsigned int err_mask;
415 struct ata_taskfile result_tf;
416 ata_qc_cb_t complete_fn;
417
418 void *private_data;
419 };
420
421 struct ata_host_stats {
422 unsigned long unhandled_irq;
423 unsigned long idle_irq;
424 unsigned long rw_reqbuf;
425 };
426
427 struct ata_ering_entry {
428 int is_io;
429 unsigned int err_mask;
430 u64 timestamp;
431 };
432
433 struct ata_ering {
434 int cursor;
435 struct ata_ering_entry ring[ATA_ERING_SIZE];
436 };
437
438 struct ata_device {
439 struct ata_port *ap;
440 unsigned int devno; /* 0 or 1 */
441 unsigned long flags; /* ATA_DFLAG_xxx */
442 struct scsi_device *sdev; /* attached SCSI device */
443 /* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */
444 u64 n_sectors; /* size of device, if ATA */
445 unsigned int class; /* ATA_DEV_xxx */
446 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
447 u8 pio_mode;
448 u8 dma_mode;
449 u8 xfer_mode;
450 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
451
452 unsigned int multi_count; /* sectors count for
453 READ/WRITE MULTIPLE */
454 unsigned int max_sectors; /* per-device max sectors */
455 unsigned int cdb_len;
456
457 /* per-dev xfer mask */
458 unsigned int pio_mask;
459 unsigned int mwdma_mask;
460 unsigned int udma_mask;
461
462 /* for CHS addressing */
463 u16 cylinders; /* Number of cylinders */
464 u16 heads; /* Number of heads */
465 u16 sectors; /* Number of sectors per track */
466
467 /* error history */
468 struct ata_ering ering;
469 };
470
471 /* Offset into struct ata_device. Fields above it are maintained
472 * acress device init. Fields below are zeroed.
473 */
474 #define ATA_DEVICE_CLEAR_OFFSET offsetof(struct ata_device, n_sectors)
475
476 struct ata_eh_info {
477 struct ata_device *dev; /* offending device */
478 u32 serror; /* SError from LLDD */
479 unsigned int err_mask; /* port-wide err_mask */
480 unsigned int action; /* ATA_EH_* action mask */
481 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */
482 unsigned int flags; /* ATA_EHI_* flags */
483
484 unsigned long hotplug_timestamp;
485 unsigned int probe_mask;
486
487 char desc[ATA_EH_DESC_LEN];
488 int desc_len;
489 };
490
491 struct ata_eh_context {
492 struct ata_eh_info i;
493 int tries[ATA_MAX_DEVICES];
494 unsigned int classes[ATA_MAX_DEVICES];
495 unsigned int did_probe_mask;
496 };
497
498 struct ata_port {
499 struct Scsi_Host *host; /* our co-allocated scsi host */
500 const struct ata_port_operations *ops;
501 spinlock_t *lock;
502 unsigned long flags; /* ATA_FLAG_xxx */
503 unsigned int pflags; /* ATA_PFLAG_xxx */
504 unsigned int id; /* unique id req'd by scsi midlyr */
505 unsigned int port_no; /* unique port #; from zero */
506 unsigned int hard_port_no; /* hardware port #; from zero */
507
508 struct ata_prd *prd; /* our SG list */
509 dma_addr_t prd_dma; /* and its DMA mapping */
510
511 void *pad; /* array of DMA pad buffers */
512 dma_addr_t pad_dma;
513
514 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
515
516 u8 ctl; /* cache of ATA control register */
517 u8 last_ctl; /* Cache last written value */
518 unsigned int pio_mask;
519 unsigned int mwdma_mask;
520 unsigned int udma_mask;
521 unsigned int cbl; /* cable type; ATA_CBL_xxx */
522 unsigned int hw_sata_spd_limit;
523 unsigned int sata_spd_limit; /* SATA PHY speed limit */
524
525 /* record runtime error info, protected by host_set lock */
526 struct ata_eh_info eh_info;
527 /* EH context owned by EH */
528 struct ata_eh_context eh_context;
529
530 struct ata_device device[ATA_MAX_DEVICES];
531
532 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
533 unsigned long qc_allocated;
534 unsigned int qc_active;
535
536 unsigned int active_tag;
537 u32 sactive;
538
539 struct ata_host_stats stats;
540 struct ata_host_set *host_set;
541 struct device *dev;
542
543 struct work_struct port_task;
544 struct work_struct hotplug_task;
545 struct work_struct scsi_rescan_task;
546
547 unsigned int hsm_task_state;
548
549 u32 msg_enable;
550 struct list_head eh_done_q;
551 wait_queue_head_t eh_wait_q;
552
553 pm_message_t pm_mesg;
554 int *pm_result;
555
556 void *private_data;
557
558 u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */
559 };
560
561 struct ata_port_operations {
562 void (*port_disable) (struct ata_port *);
563
564 void (*dev_config) (struct ata_port *, struct ata_device *);
565
566 void (*set_piomode) (struct ata_port *, struct ata_device *);
567 void (*set_dmamode) (struct ata_port *, struct ata_device *);
568 unsigned long (*mode_filter) (const struct ata_port *, struct ata_device *, unsigned long);
569
570 void (*tf_load) (struct ata_port *ap, const struct ata_taskfile *tf);
571 void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf);
572
573 void (*exec_command)(struct ata_port *ap, const struct ata_taskfile *tf);
574 u8 (*check_status)(struct ata_port *ap);
575 u8 (*check_altstatus)(struct ata_port *ap);
576 void (*dev_select)(struct ata_port *ap, unsigned int device);
577
578 void (*phy_reset) (struct ata_port *ap); /* obsolete */
579 void (*set_mode) (struct ata_port *ap);
580
581 void (*post_set_mode) (struct ata_port *ap);
582
583 int (*check_atapi_dma) (struct ata_queued_cmd *qc);
584
585 void (*bmdma_setup) (struct ata_queued_cmd *qc);
586 void (*bmdma_start) (struct ata_queued_cmd *qc);
587
588 void (*data_xfer) (struct ata_device *, unsigned char *, unsigned int, int);
589
590 void (*qc_prep) (struct ata_queued_cmd *qc);
591 unsigned int (*qc_issue) (struct ata_queued_cmd *qc);
592
593 /* Error handlers. ->error_handler overrides ->eng_timeout and
594 * indicates that new-style EH is in place.
595 */
596 void (*eng_timeout) (struct ata_port *ap); /* obsolete */
597
598 void (*freeze) (struct ata_port *ap);
599 void (*thaw) (struct ata_port *ap);
600 void (*error_handler) (struct ata_port *ap);
601 void (*post_internal_cmd) (struct ata_queued_cmd *qc);
602
603 irqreturn_t (*irq_handler)(int, void *, struct pt_regs *);
604 void (*irq_clear) (struct ata_port *);
605
606 u32 (*scr_read) (struct ata_port *ap, unsigned int sc_reg);
607 void (*scr_write) (struct ata_port *ap, unsigned int sc_reg,
608 u32 val);
609
610 int (*port_suspend) (struct ata_port *ap, pm_message_t mesg);
611 int (*port_resume) (struct ata_port *ap);
612
613 int (*port_start) (struct ata_port *ap);
614 void (*port_stop) (struct ata_port *ap);
615
616 void (*host_stop) (struct ata_host_set *host_set);
617
618 void (*bmdma_stop) (struct ata_queued_cmd *qc);
619 u8 (*bmdma_status) (struct ata_port *ap);
620 };
621
622 struct ata_port_info {
623 struct scsi_host_template *sht;
624 unsigned long host_flags;
625 unsigned long pio_mask;
626 unsigned long mwdma_mask;
627 unsigned long udma_mask;
628 const struct ata_port_operations *port_ops;
629 void *private_data;
630 };
631
632 struct ata_timing {
633 unsigned short mode; /* ATA mode */
634 unsigned short setup; /* t1 */
635 unsigned short act8b; /* t2 for 8-bit I/O */
636 unsigned short rec8b; /* t2i for 8-bit I/O */
637 unsigned short cyc8b; /* t0 for 8-bit I/O */
638 unsigned short active; /* t2 or tD */
639 unsigned short recover; /* t2i or tK */
640 unsigned short cycle; /* t0 */
641 unsigned short udma; /* t2CYCTYP/2 */
642 };
643
644 #define FIT(v,vmin,vmax) max_t(short,min_t(short,v,vmax),vmin)
645
646 extern const unsigned long sata_deb_timing_normal[];
647 extern const unsigned long sata_deb_timing_hotplug[];
648 extern const unsigned long sata_deb_timing_long[];
649
650 static inline const unsigned long *
651 sata_ehc_deb_timing(struct ata_eh_context *ehc)
652 {
653 if (ehc->i.flags & ATA_EHI_HOTPLUGGED)
654 return sata_deb_timing_hotplug;
655 else
656 return sata_deb_timing_normal;
657 }
658
659 extern void ata_port_probe(struct ata_port *);
660 extern void __sata_phy_reset(struct ata_port *ap);
661 extern void sata_phy_reset(struct ata_port *ap);
662 extern void ata_bus_reset(struct ata_port *ap);
663 extern int sata_set_spd(struct ata_port *ap);
664 extern int sata_phy_debounce(struct ata_port *ap, const unsigned long *param);
665 extern int sata_phy_resume(struct ata_port *ap, const unsigned long *param);
666 extern int ata_std_prereset(struct ata_port *ap);
667 extern int ata_std_softreset(struct ata_port *ap, unsigned int *classes);
668 extern int sata_std_hardreset(struct ata_port *ap, unsigned int *class);
669 extern void ata_std_postreset(struct ata_port *ap, unsigned int *classes);
670 extern int ata_dev_revalidate(struct ata_device *dev, int post_reset);
671 extern void ata_port_disable(struct ata_port *);
672 extern void ata_std_ports(struct ata_ioports *ioaddr);
673 #ifdef CONFIG_PCI
674 extern int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info,
675 unsigned int n_ports);
676 extern void ata_pci_remove_one (struct pci_dev *pdev);
677 extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t state);
678 extern void ata_pci_device_do_resume(struct pci_dev *pdev);
679 extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t state);
680 extern int ata_pci_device_resume(struct pci_dev *pdev);
681 extern int ata_pci_clear_simplex(struct pci_dev *pdev);
682 #endif /* CONFIG_PCI */
683 extern int ata_device_add(const struct ata_probe_ent *ent);
684 extern void ata_port_detach(struct ata_port *ap);
685 extern void ata_host_set_remove(struct ata_host_set *host_set);
686 extern int ata_scsi_detect(struct scsi_host_template *sht);
687 extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
688 extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *));
689 extern int ata_scsi_release(struct Scsi_Host *host);
690 extern unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc);
691 extern int sata_scr_valid(struct ata_port *ap);
692 extern int sata_scr_read(struct ata_port *ap, int reg, u32 *val);
693 extern int sata_scr_write(struct ata_port *ap, int reg, u32 val);
694 extern int sata_scr_write_flush(struct ata_port *ap, int reg, u32 val);
695 extern int ata_port_online(struct ata_port *ap);
696 extern int ata_port_offline(struct ata_port *ap);
697 extern int ata_scsi_device_resume(struct scsi_device *);
698 extern int ata_scsi_device_suspend(struct scsi_device *, pm_message_t state);
699 extern int ata_host_set_suspend(struct ata_host_set *host_set,
700 pm_message_t mesg);
701 extern void ata_host_set_resume(struct ata_host_set *host_set);
702 extern int ata_ratelimit(void);
703 extern unsigned int ata_busy_sleep(struct ata_port *ap,
704 unsigned long timeout_pat,
705 unsigned long timeout);
706 extern void ata_port_queue_task(struct ata_port *ap, void (*fn)(void *),
707 void *data, unsigned long delay);
708 extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
709 unsigned long interval_msec,
710 unsigned long timeout_msec);
711
712 /*
713 * Default driver ops implementations
714 */
715 extern void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
716 extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
717 extern void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp);
718 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
719 extern void ata_noop_dev_select (struct ata_port *ap, unsigned int device);
720 extern void ata_std_dev_select (struct ata_port *ap, unsigned int device);
721 extern u8 ata_check_status(struct ata_port *ap);
722 extern u8 ata_altstatus(struct ata_port *ap);
723 extern void ata_exec_command(struct ata_port *ap, const struct ata_taskfile *tf);
724 extern int ata_port_start (struct ata_port *ap);
725 extern void ata_port_stop (struct ata_port *ap);
726 extern void ata_host_stop (struct ata_host_set *host_set);
727 extern irqreturn_t ata_interrupt (int irq, void *dev_instance, struct pt_regs *regs);
728 extern void ata_mmio_data_xfer(struct ata_device *adev, unsigned char *buf,
729 unsigned int buflen, int write_data);
730 extern void ata_pio_data_xfer(struct ata_device *adev, unsigned char *buf,
731 unsigned int buflen, int write_data);
732 extern void ata_pio_data_xfer_noirq(struct ata_device *adev, unsigned char *buf,
733 unsigned int buflen, int write_data);
734 extern void ata_qc_prep(struct ata_queued_cmd *qc);
735 extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
736 extern unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc);
737 extern void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf,
738 unsigned int buflen);
739 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
740 unsigned int n_elem);
741 extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
742 extern void ata_id_string(const u16 *id, unsigned char *s,
743 unsigned int ofs, unsigned int len);
744 extern void ata_id_c_string(const u16 *id, unsigned char *s,
745 unsigned int ofs, unsigned int len);
746 extern void ata_bmdma_setup (struct ata_queued_cmd *qc);
747 extern void ata_bmdma_start (struct ata_queued_cmd *qc);
748 extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
749 extern u8 ata_bmdma_status(struct ata_port *ap);
750 extern void ata_bmdma_irq_clear(struct ata_port *ap);
751 extern void ata_bmdma_freeze(struct ata_port *ap);
752 extern void ata_bmdma_thaw(struct ata_port *ap);
753 extern void ata_bmdma_drive_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
754 ata_reset_fn_t softreset,
755 ata_reset_fn_t hardreset,
756 ata_postreset_fn_t postreset);
757 extern void ata_bmdma_error_handler(struct ata_port *ap);
758 extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc);
759 extern int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
760 u8 status, int in_wq);
761 extern void ata_qc_complete(struct ata_queued_cmd *qc);
762 extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active,
763 void (*finish_qc)(struct ata_queued_cmd *));
764 extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
765 void (*done)(struct scsi_cmnd *));
766 extern int ata_std_bios_param(struct scsi_device *sdev,
767 struct block_device *bdev,
768 sector_t capacity, int geom[]);
769 extern int ata_scsi_slave_config(struct scsi_device *sdev);
770 extern void ata_scsi_slave_destroy(struct scsi_device *sdev);
771 extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
772 int queue_depth);
773 extern struct ata_device *ata_dev_pair(struct ata_device *adev);
774
775 /*
776 * Timing helpers
777 */
778
779 extern unsigned int ata_pio_need_iordy(const struct ata_device *);
780 extern int ata_timing_compute(struct ata_device *, unsigned short,
781 struct ata_timing *, int, int);
782 extern void ata_timing_merge(const struct ata_timing *,
783 const struct ata_timing *, struct ata_timing *,
784 unsigned int);
785
786 enum {
787 ATA_TIMING_SETUP = (1 << 0),
788 ATA_TIMING_ACT8B = (1 << 1),
789 ATA_TIMING_REC8B = (1 << 2),
790 ATA_TIMING_CYC8B = (1 << 3),
791 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
792 ATA_TIMING_CYC8B,
793 ATA_TIMING_ACTIVE = (1 << 4),
794 ATA_TIMING_RECOVER = (1 << 5),
795 ATA_TIMING_CYCLE = (1 << 6),
796 ATA_TIMING_UDMA = (1 << 7),
797 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
798 ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
799 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
800 ATA_TIMING_CYCLE | ATA_TIMING_UDMA,
801 };
802
803
804 #ifdef CONFIG_PCI
805 struct pci_bits {
806 unsigned int reg; /* PCI config register to read */
807 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
808 unsigned long mask;
809 unsigned long val;
810 };
811
812 extern void ata_pci_host_stop (struct ata_host_set *host_set);
813 extern struct ata_probe_ent *
814 ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port, int portmask);
815 extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
816 extern unsigned long ata_pci_default_filter(const struct ata_port *, struct ata_device *, unsigned long);
817 #endif /* CONFIG_PCI */
818
819 /*
820 * EH
821 */
822 extern void ata_eng_timeout(struct ata_port *ap);
823
824 extern void ata_port_schedule_eh(struct ata_port *ap);
825 extern int ata_port_abort(struct ata_port *ap);
826 extern int ata_port_freeze(struct ata_port *ap);
827
828 extern void ata_eh_freeze_port(struct ata_port *ap);
829 extern void ata_eh_thaw_port(struct ata_port *ap);
830
831 extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
832 extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
833
834 extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
835 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
836 ata_postreset_fn_t postreset);
837
838 /*
839 * printk helpers
840 */
841 #define ata_port_printk(ap, lv, fmt, args...) \
842 printk(lv"ata%u: "fmt, (ap)->id , ##args)
843
844 #define ata_dev_printk(dev, lv, fmt, args...) \
845 printk(lv"ata%u.%02u: "fmt, (dev)->ap->id, (dev)->devno , ##args)
846
847 /*
848 * ata_eh_info helpers
849 */
850 #define ata_ehi_push_desc(ehi, fmt, args...) do { \
851 (ehi)->desc_len += scnprintf((ehi)->desc + (ehi)->desc_len, \
852 ATA_EH_DESC_LEN - (ehi)->desc_len, \
853 fmt , ##args); \
854 } while (0)
855
856 #define ata_ehi_clear_desc(ehi) do { \
857 (ehi)->desc[0] = '\0'; \
858 (ehi)->desc_len = 0; \
859 } while (0)
860
861 static inline void __ata_ehi_hotplugged(struct ata_eh_info *ehi)
862 {
863 if (ehi->flags & ATA_EHI_HOTPLUGGED)
864 return;
865
866 ehi->flags |= ATA_EHI_HOTPLUGGED | ATA_EHI_RESUME_LINK;
867 ehi->hotplug_timestamp = jiffies;
868
869 ehi->action |= ATA_EH_SOFTRESET;
870 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
871 }
872
873 static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
874 {
875 __ata_ehi_hotplugged(ehi);
876 ehi->err_mask |= AC_ERR_ATA_BUS;
877 }
878
879 /*
880 * qc helpers
881 */
882 static inline int
883 ata_sg_is_last(struct scatterlist *sg, struct ata_queued_cmd *qc)
884 {
885 if (sg == &qc->pad_sgent)
886 return 1;
887 if (qc->pad_len)
888 return 0;
889 if (((sg - qc->__sg) + 1) == qc->n_elem)
890 return 1;
891 return 0;
892 }
893
894 static inline struct scatterlist *
895 ata_qc_first_sg(struct ata_queued_cmd *qc)
896 {
897 if (qc->n_elem)
898 return qc->__sg;
899 if (qc->pad_len)
900 return &qc->pad_sgent;
901 return NULL;
902 }
903
904 static inline struct scatterlist *
905 ata_qc_next_sg(struct scatterlist *sg, struct ata_queued_cmd *qc)
906 {
907 if (sg == &qc->pad_sgent)
908 return NULL;
909 if (++sg - qc->__sg < qc->n_elem)
910 return sg;
911 if (qc->pad_len)
912 return &qc->pad_sgent;
913 return NULL;
914 }
915
916 #define ata_for_each_sg(sg, qc) \
917 for (sg = ata_qc_first_sg(qc); sg; sg = ata_qc_next_sg(sg, qc))
918
919 static inline unsigned int ata_tag_valid(unsigned int tag)
920 {
921 return (tag < ATA_MAX_QUEUE) ? 1 : 0;
922 }
923
924 static inline unsigned int ata_tag_internal(unsigned int tag)
925 {
926 return tag == ATA_MAX_QUEUE - 1;
927 }
928
929 /*
930 * device helpers
931 */
932 static inline unsigned int ata_class_enabled(unsigned int class)
933 {
934 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI;
935 }
936
937 static inline unsigned int ata_class_disabled(unsigned int class)
938 {
939 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP;
940 }
941
942 static inline unsigned int ata_class_absent(unsigned int class)
943 {
944 return !ata_class_enabled(class) && !ata_class_disabled(class);
945 }
946
947 static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
948 {
949 return ata_class_enabled(dev->class);
950 }
951
952 static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
953 {
954 return ata_class_disabled(dev->class);
955 }
956
957 static inline unsigned int ata_dev_absent(const struct ata_device *dev)
958 {
959 return ata_class_absent(dev->class);
960 }
961
962 static inline unsigned int ata_dev_ready(const struct ata_device *dev)
963 {
964 return ata_dev_enabled(dev) && !(dev->flags & ATA_DFLAG_SUSPENDED);
965 }
966
967 /*
968 * port helpers
969 */
970 static inline int ata_port_max_devices(const struct ata_port *ap)
971 {
972 if (ap->flags & ATA_FLAG_SLAVE_POSS)
973 return 2;
974 return 1;
975 }
976
977
978 static inline u8 ata_chk_status(struct ata_port *ap)
979 {
980 return ap->ops->check_status(ap);
981 }
982
983
984 /**
985 * ata_pause - Flush writes and pause 400 nanoseconds.
986 * @ap: Port to wait for.
987 *
988 * LOCKING:
989 * Inherited from caller.
990 */
991
992 static inline void ata_pause(struct ata_port *ap)
993 {
994 ata_altstatus(ap);
995 ndelay(400);
996 }
997
998
999 /**
1000 * ata_busy_wait - Wait for a port status register
1001 * @ap: Port to wait for.
1002 *
1003 * Waits up to max*10 microseconds for the selected bits in the port's
1004 * status register to be cleared.
1005 * Returns final value of status register.
1006 *
1007 * LOCKING:
1008 * Inherited from caller.
1009 */
1010
1011 static inline u8 ata_busy_wait(struct ata_port *ap, unsigned int bits,
1012 unsigned int max)
1013 {
1014 u8 status;
1015
1016 do {
1017 udelay(10);
1018 status = ata_chk_status(ap);
1019 max--;
1020 } while ((status & bits) && (max > 0));
1021
1022 return status;
1023 }
1024
1025
1026 /**
1027 * ata_wait_idle - Wait for a port to be idle.
1028 * @ap: Port to wait for.
1029 *
1030 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
1031 * Returns final value of status register.
1032 *
1033 * LOCKING:
1034 * Inherited from caller.
1035 */
1036
1037 static inline u8 ata_wait_idle(struct ata_port *ap)
1038 {
1039 u8 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
1040
1041 if (status & (ATA_BUSY | ATA_DRQ)) {
1042 unsigned long l = ap->ioaddr.status_addr;
1043 if (ata_msg_warn(ap))
1044 printk(KERN_WARNING "ATA: abnormal status 0x%X on port 0x%lX\n",
1045 status, l);
1046 }
1047
1048 return status;
1049 }
1050
1051 static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
1052 {
1053 qc->tf.ctl |= ATA_NIEN;
1054 }
1055
1056 static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap,
1057 unsigned int tag)
1058 {
1059 if (likely(ata_tag_valid(tag)))
1060 return &ap->qcmd[tag];
1061 return NULL;
1062 }
1063
1064 static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap,
1065 unsigned int tag)
1066 {
1067 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
1068
1069 if (unlikely(!qc) || !ap->ops->error_handler)
1070 return qc;
1071
1072 if ((qc->flags & (ATA_QCFLAG_ACTIVE |
1073 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE)
1074 return qc;
1075
1076 return NULL;
1077 }
1078
1079 static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
1080 {
1081 memset(tf, 0, sizeof(*tf));
1082
1083 tf->ctl = dev->ap->ctl;
1084 if (dev->devno == 0)
1085 tf->device = ATA_DEVICE_OBS;
1086 else
1087 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
1088 }
1089
1090 static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
1091 {
1092 qc->__sg = NULL;
1093 qc->flags = 0;
1094 qc->cursect = qc->cursg = qc->cursg_ofs = 0;
1095 qc->nsect = 0;
1096 qc->nbytes = qc->curbytes = 0;
1097 qc->err_mask = 0;
1098
1099 ata_tf_init(qc->dev, &qc->tf);
1100
1101 /* init result_tf such that it indicates normal completion */
1102 qc->result_tf.command = ATA_DRDY;
1103 qc->result_tf.feature = 0;
1104 }
1105
1106 /**
1107 * ata_irq_on - Enable interrupts on a port.
1108 * @ap: Port on which interrupts are enabled.
1109 *
1110 * Enable interrupts on a legacy IDE device using MMIO or PIO,
1111 * wait for idle, clear any pending interrupts.
1112 *
1113 * LOCKING:
1114 * Inherited from caller.
1115 */
1116
1117 static inline u8 ata_irq_on(struct ata_port *ap)
1118 {
1119 struct ata_ioports *ioaddr = &ap->ioaddr;
1120 u8 tmp;
1121
1122 ap->ctl &= ~ATA_NIEN;
1123 ap->last_ctl = ap->ctl;
1124
1125 if (ap->flags & ATA_FLAG_MMIO)
1126 writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr);
1127 else
1128 outb(ap->ctl, ioaddr->ctl_addr);
1129 tmp = ata_wait_idle(ap);
1130
1131 ap->ops->irq_clear(ap);
1132
1133 return tmp;
1134 }
1135
1136
1137 /**
1138 * ata_irq_ack - Acknowledge a device interrupt.
1139 * @ap: Port on which interrupts are enabled.
1140 *
1141 * Wait up to 10 ms for legacy IDE device to become idle (BUSY
1142 * or BUSY+DRQ clear). Obtain dma status and port status from
1143 * device. Clear the interrupt. Return port status.
1144 *
1145 * LOCKING:
1146 */
1147
1148 static inline u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq)
1149 {
1150 unsigned int bits = chk_drq ? ATA_BUSY | ATA_DRQ : ATA_BUSY;
1151 u8 host_stat, post_stat, status;
1152
1153 status = ata_busy_wait(ap, bits, 1000);
1154 if (status & bits)
1155 if (ata_msg_err(ap))
1156 printk(KERN_ERR "abnormal status 0x%X\n", status);
1157
1158 /* get controller status; clear intr, err bits */
1159 if (ap->flags & ATA_FLAG_MMIO) {
1160 void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr;
1161 host_stat = readb(mmio + ATA_DMA_STATUS);
1162 writeb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR,
1163 mmio + ATA_DMA_STATUS);
1164
1165 post_stat = readb(mmio + ATA_DMA_STATUS);
1166 } else {
1167 host_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
1168 outb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR,
1169 ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
1170
1171 post_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
1172 }
1173
1174 if (ata_msg_intr(ap))
1175 printk(KERN_INFO "%s: irq ack: host_stat 0x%X, new host_stat 0x%X, drv_stat 0x%X\n",
1176 __FUNCTION__,
1177 host_stat, post_stat, status);
1178
1179 return status;
1180 }
1181
1182 static inline int ata_try_flush_cache(const struct ata_device *dev)
1183 {
1184 return ata_id_wcache_enabled(dev->id) ||
1185 ata_id_has_flush(dev->id) ||
1186 ata_id_has_flush_ext(dev->id);
1187 }
1188
1189 static inline unsigned int ac_err_mask(u8 status)
1190 {
1191 if (status & (ATA_BUSY | ATA_DRQ))
1192 return AC_ERR_HSM;
1193 if (status & (ATA_ERR | ATA_DF))
1194 return AC_ERR_DEV;
1195 return 0;
1196 }
1197
1198 static inline unsigned int __ac_err_mask(u8 status)
1199 {
1200 unsigned int mask = ac_err_mask(status);
1201 if (mask == 0)
1202 return AC_ERR_OTHER;
1203 return mask;
1204 }
1205
1206 static inline int ata_pad_alloc(struct ata_port *ap, struct device *dev)
1207 {
1208 ap->pad_dma = 0;
1209 ap->pad = dma_alloc_coherent(dev, ATA_DMA_PAD_BUF_SZ,
1210 &ap->pad_dma, GFP_KERNEL);
1211 return (ap->pad == NULL) ? -ENOMEM : 0;
1212 }
1213
1214 static inline void ata_pad_free(struct ata_port *ap, struct device *dev)
1215 {
1216 dma_free_coherent(dev, ATA_DMA_PAD_BUF_SZ, ap->pad, ap->pad_dma);
1217 }
1218
1219 static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
1220 {
1221 return (struct ata_port *) &host->hostdata[0];
1222 }
1223
1224 #endif /* __LINUX_LIBATA_H__ */
Linux kernel - Deliverables
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