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libata: kill qc->nsect and cursect
[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 static inline struct device *pci_dev_to_dev(struct pci_dev *pdev)
113 {
114 return &pdev->dev;
115 }
116
117 enum {
118 /* various global constants */
119 LIBATA_MAX_PRD = ATA_MAX_PRD / 2,
120 ATA_MAX_PORTS = 8,
121 ATA_DEF_QUEUE = 1,
122 /* tag ATA_MAX_QUEUE - 1 is reserved for internal commands */
123 ATA_MAX_QUEUE = 32,
124 ATA_TAG_INTERNAL = ATA_MAX_QUEUE - 1,
125 ATA_MAX_BUS = 2,
126 ATA_DEF_BUSY_WAIT = 10000,
127 ATA_SHORT_PAUSE = (HZ >> 6) + 1,
128
129 ATA_SHT_EMULATED = 1,
130 ATA_SHT_CMD_PER_LUN = 1,
131 ATA_SHT_THIS_ID = -1,
132 ATA_SHT_USE_CLUSTERING = 1,
133
134 /* struct ata_device stuff */
135 ATA_DFLAG_LBA = (1 << 0), /* device supports LBA */
136 ATA_DFLAG_LBA48 = (1 << 1), /* device supports LBA48 */
137 ATA_DFLAG_CDB_INTR = (1 << 2), /* device asserts INTRQ when ready for CDB */
138 ATA_DFLAG_NCQ = (1 << 3), /* device supports NCQ */
139 ATA_DFLAG_FLUSH_EXT = (1 << 4), /* do FLUSH_EXT instead of FLUSH */
140 ATA_DFLAG_CFG_MASK = (1 << 8) - 1,
141
142 ATA_DFLAG_PIO = (1 << 8), /* device limited to PIO mode */
143 ATA_DFLAG_NCQ_OFF = (1 << 9), /* device limited to non-NCQ mode */
144 ATA_DFLAG_SUSPENDED = (1 << 10), /* device suspended */
145 ATA_DFLAG_INIT_MASK = (1 << 16) - 1,
146
147 ATA_DFLAG_DETACH = (1 << 16),
148 ATA_DFLAG_DETACHED = (1 << 17),
149
150 ATA_DEV_UNKNOWN = 0, /* unknown device */
151 ATA_DEV_ATA = 1, /* ATA device */
152 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */
153 ATA_DEV_ATAPI = 3, /* ATAPI device */
154 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */
155 ATA_DEV_NONE = 5, /* no device */
156
157 /* struct ata_port flags */
158 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */
159 /* (doesn't imply presence) */
160 ATA_FLAG_SATA = (1 << 1),
161 ATA_FLAG_NO_LEGACY = (1 << 2), /* no legacy mode check */
162 ATA_FLAG_MMIO = (1 << 3), /* use MMIO, not PIO */
163 ATA_FLAG_SRST = (1 << 4), /* (obsolete) use ATA SRST, not E.D.D. */
164 ATA_FLAG_SATA_RESET = (1 << 5), /* (obsolete) use COMRESET */
165 ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */
166 ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */
167 ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */
168 ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD
169 * doesn't handle PIO interrupts */
170 ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */
171 ATA_FLAG_HRST_TO_RESUME = (1 << 11), /* hardreset to resume phy */
172 ATA_FLAG_SKIP_D2H_BSY = (1 << 12), /* can't wait for the first D2H
173 * Register FIS clearing BSY */
174 ATA_FLAG_DEBUGMSG = (1 << 13),
175 ATA_FLAG_SETXFER_POLLING= (1 << 14), /* use polling for SETXFER */
176 ATA_FLAG_IGN_SIMPLEX = (1 << 15), /* ignore SIMPLEX */
177
178 /* The following flag belongs to ap->pflags but is kept in
179 * ap->flags because it's referenced in many LLDs and will be
180 * removed in not-too-distant future.
181 */
182 ATA_FLAG_DISABLED = (1 << 23), /* port is disabled, ignore it */
183
184 /* bits 24:31 of ap->flags are reserved for LLD specific flags */
185
186 /* struct ata_port pflags */
187 ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */
188 ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */
189 ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */
190 ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */
191 ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */
192 ATA_PFLAG_UNLOADING = (1 << 5), /* module is unloading */
193 ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */
194
195 ATA_PFLAG_FLUSH_PORT_TASK = (1 << 16), /* flush port task */
196 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */
197 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */
198
199 /* struct ata_queued_cmd flags */
200 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */
201 ATA_QCFLAG_SG = (1 << 1), /* have s/g table? */
202 ATA_QCFLAG_SINGLE = (1 << 2), /* no s/g, just a single buffer */
203 ATA_QCFLAG_DMAMAP = ATA_QCFLAG_SG | ATA_QCFLAG_SINGLE,
204 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */
205 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */
206
207 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */
208 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */
209 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */
210
211 /* host set flags */
212 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */
213
214 /* various lengths of time */
215 ATA_TMOUT_BOOT = 30 * HZ, /* heuristic */
216 ATA_TMOUT_BOOT_QUICK = 7 * HZ, /* heuristic */
217 ATA_TMOUT_INTERNAL = 30 * HZ,
218 ATA_TMOUT_INTERNAL_QUICK = 5 * HZ,
219
220 /* ATA bus states */
221 BUS_UNKNOWN = 0,
222 BUS_DMA = 1,
223 BUS_IDLE = 2,
224 BUS_NOINTR = 3,
225 BUS_NODATA = 4,
226 BUS_TIMER = 5,
227 BUS_PIO = 6,
228 BUS_EDD = 7,
229 BUS_IDENTIFY = 8,
230 BUS_PACKET = 9,
231
232 /* SATA port states */
233 PORT_UNKNOWN = 0,
234 PORT_ENABLED = 1,
235 PORT_DISABLED = 2,
236
237 /* encoding various smaller bitmaps into a single
238 * unsigned int bitmap
239 */
240 ATA_BITS_PIO = 7,
241 ATA_BITS_MWDMA = 5,
242 ATA_BITS_UDMA = 8,
243
244 ATA_SHIFT_PIO = 0,
245 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_BITS_PIO,
246 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_BITS_MWDMA,
247
248 ATA_MASK_PIO = ((1 << ATA_BITS_PIO) - 1) << ATA_SHIFT_PIO,
249 ATA_MASK_MWDMA = ((1 << ATA_BITS_MWDMA) - 1) << ATA_SHIFT_MWDMA,
250 ATA_MASK_UDMA = ((1 << ATA_BITS_UDMA) - 1) << ATA_SHIFT_UDMA,
251
252 /* size of buffer to pad xfers ending on unaligned boundaries */
253 ATA_DMA_PAD_SZ = 4,
254 ATA_DMA_PAD_BUF_SZ = ATA_DMA_PAD_SZ * ATA_MAX_QUEUE,
255
256 /* masks for port functions */
257 ATA_PORT_PRIMARY = (1 << 0),
258 ATA_PORT_SECONDARY = (1 << 1),
259
260 /* ering size */
261 ATA_ERING_SIZE = 32,
262
263 /* desc_len for ata_eh_info and context */
264 ATA_EH_DESC_LEN = 80,
265
266 /* reset / recovery action types */
267 ATA_EH_REVALIDATE = (1 << 0),
268 ATA_EH_SOFTRESET = (1 << 1),
269 ATA_EH_HARDRESET = (1 << 2),
270 ATA_EH_SUSPEND = (1 << 3),
271 ATA_EH_RESUME = (1 << 4),
272 ATA_EH_PM_FREEZE = (1 << 5),
273
274 ATA_EH_RESET_MASK = ATA_EH_SOFTRESET | ATA_EH_HARDRESET,
275 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE | ATA_EH_SUSPEND |
276 ATA_EH_RESUME | ATA_EH_PM_FREEZE,
277
278 /* ata_eh_info->flags */
279 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */
280 ATA_EHI_RESUME_LINK = (1 << 1), /* resume link (reset modifier) */
281 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */
282 ATA_EHI_QUIET = (1 << 3), /* be quiet */
283
284 ATA_EHI_DID_RESET = (1 << 16), /* already reset this port */
285 ATA_EHI_PRINTINFO = (1 << 17), /* print configuration info */
286 ATA_EHI_SETMODE = (1 << 18), /* configure transfer mode */
287 ATA_EHI_POST_SETMODE = (1 << 19), /* revaildating after setmode */
288
289 ATA_EHI_RESET_MODIFIER_MASK = ATA_EHI_RESUME_LINK,
290
291 /* max repeat if error condition is still set after ->error_handler */
292 ATA_EH_MAX_REPEAT = 5,
293
294 /* how hard are we gonna try to probe/recover devices */
295 ATA_PROBE_MAX_TRIES = 3,
296 ATA_EH_RESET_TRIES = 3,
297 ATA_EH_DEV_TRIES = 3,
298
299 /* Drive spinup time (time from power-on to the first D2H FIS)
300 * in msecs - 8s currently. Failing to get ready in this time
301 * isn't critical. It will result in reset failure for
302 * controllers which can't wait for the first D2H FIS. libata
303 * will retry, so it just has to be long enough to spin up
304 * most devices.
305 */
306 ATA_SPINUP_WAIT = 8000,
307
308 /* Horkage types. May be set by libata or controller on drives
309 (some horkage may be drive/controller pair dependant */
310
311 ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */
312 ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */
313 ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */
314 };
315
316 enum hsm_task_states {
317 HSM_ST_IDLE, /* no command on going */
318 HSM_ST, /* (waiting the device to) transfer data */
319 HSM_ST_LAST, /* (waiting the device to) complete command */
320 HSM_ST_ERR, /* error */
321 HSM_ST_FIRST, /* (waiting the device to)
322 write CDB or first data block */
323 };
324
325 enum ata_completion_errors {
326 AC_ERR_DEV = (1 << 0), /* device reported error */
327 AC_ERR_HSM = (1 << 1), /* host state machine violation */
328 AC_ERR_TIMEOUT = (1 << 2), /* timeout */
329 AC_ERR_MEDIA = (1 << 3), /* media error */
330 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */
331 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */
332 AC_ERR_SYSTEM = (1 << 6), /* system error */
333 AC_ERR_INVALID = (1 << 7), /* invalid argument */
334 AC_ERR_OTHER = (1 << 8), /* unknown */
335 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */
336 };
337
338 /* forward declarations */
339 struct scsi_device;
340 struct ata_port_operations;
341 struct ata_port;
342 struct ata_queued_cmd;
343
344 /* typedefs */
345 typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
346 typedef int (*ata_prereset_fn_t)(struct ata_port *ap);
347 typedef int (*ata_reset_fn_t)(struct ata_port *ap, unsigned int *classes);
348 typedef void (*ata_postreset_fn_t)(struct ata_port *ap, unsigned int *classes);
349
350 struct ata_ioports {
351 unsigned long cmd_addr;
352 unsigned long data_addr;
353 unsigned long error_addr;
354 unsigned long feature_addr;
355 unsigned long nsect_addr;
356 unsigned long lbal_addr;
357 unsigned long lbam_addr;
358 unsigned long lbah_addr;
359 unsigned long device_addr;
360 unsigned long status_addr;
361 unsigned long command_addr;
362 unsigned long altstatus_addr;
363 unsigned long ctl_addr;
364 unsigned long bmdma_addr;
365 unsigned long scr_addr;
366 };
367
368 struct ata_probe_ent {
369 struct list_head node;
370 struct device *dev;
371 const struct ata_port_operations *port_ops;
372 struct scsi_host_template *sht;
373 struct ata_ioports port[ATA_MAX_PORTS];
374 unsigned int n_ports;
375 unsigned int dummy_port_mask;
376 unsigned int pio_mask;
377 unsigned int mwdma_mask;
378 unsigned int udma_mask;
379 unsigned long irq;
380 unsigned long irq2;
381 unsigned int irq_flags;
382 unsigned long port_flags;
383 unsigned long _host_flags;
384 void __iomem *mmio_base;
385 void *private_data;
386
387 /* port_info for the secondary port. Together with irq2, it's
388 * used to implement non-uniform secondary port. Currently,
389 * the only user is ata_piix combined mode. This workaround
390 * will be removed together with ata_probe_ent when init model
391 * is updated.
392 */
393 const struct ata_port_info *pinfo2;
394 };
395
396 struct ata_host {
397 spinlock_t lock;
398 struct device *dev;
399 unsigned long irq;
400 unsigned long irq2;
401 void __iomem *mmio_base;
402 unsigned int n_ports;
403 void *private_data;
404 const struct ata_port_operations *ops;
405 unsigned long flags;
406 int simplex_claimed; /* Keep seperate in case we
407 ever need to do this locked */
408 struct ata_port *ports[0];
409 };
410
411 struct ata_queued_cmd {
412 struct ata_port *ap;
413 struct ata_device *dev;
414
415 struct scsi_cmnd *scsicmd;
416 void (*scsidone)(struct scsi_cmnd *);
417
418 struct ata_taskfile tf;
419 u8 cdb[ATAPI_CDB_LEN];
420
421 unsigned long flags; /* ATA_QCFLAG_xxx */
422 unsigned int tag;
423 unsigned int n_elem;
424 unsigned int orig_n_elem;
425
426 int dma_dir;
427
428 unsigned int pad_len;
429
430 unsigned int nbytes;
431 unsigned int curbytes;
432
433 unsigned int cursg;
434 unsigned int cursg_ofs;
435
436 struct scatterlist sgent;
437 struct scatterlist pad_sgent;
438 void *buf_virt;
439
440 /* DO NOT iterate over __sg manually, use ata_for_each_sg() */
441 struct scatterlist *__sg;
442
443 unsigned int err_mask;
444 struct ata_taskfile result_tf;
445 ata_qc_cb_t complete_fn;
446
447 void *private_data;
448 };
449
450 struct ata_port_stats {
451 unsigned long unhandled_irq;
452 unsigned long idle_irq;
453 unsigned long rw_reqbuf;
454 };
455
456 struct ata_ering_entry {
457 int is_io;
458 unsigned int err_mask;
459 u64 timestamp;
460 };
461
462 struct ata_ering {
463 int cursor;
464 struct ata_ering_entry ring[ATA_ERING_SIZE];
465 };
466
467 struct ata_device {
468 struct ata_port *ap;
469 unsigned int devno; /* 0 or 1 */
470 unsigned long flags; /* ATA_DFLAG_xxx */
471 struct scsi_device *sdev; /* attached SCSI device */
472 /* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */
473 u64 n_sectors; /* size of device, if ATA */
474 unsigned int class; /* ATA_DEV_xxx */
475 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
476 u8 pio_mode;
477 u8 dma_mode;
478 u8 xfer_mode;
479 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
480
481 unsigned int multi_count; /* sectors count for
482 READ/WRITE MULTIPLE */
483 unsigned int max_sectors; /* per-device max sectors */
484 unsigned int cdb_len;
485
486 /* per-dev xfer mask */
487 unsigned int pio_mask;
488 unsigned int mwdma_mask;
489 unsigned int udma_mask;
490
491 /* for CHS addressing */
492 u16 cylinders; /* Number of cylinders */
493 u16 heads; /* Number of heads */
494 u16 sectors; /* Number of sectors per track */
495
496 /* error history */
497 struct ata_ering ering;
498 unsigned int horkage; /* List of broken features */
499 };
500
501 /* Offset into struct ata_device. Fields above it are maintained
502 * acress device init. Fields below are zeroed.
503 */
504 #define ATA_DEVICE_CLEAR_OFFSET offsetof(struct ata_device, n_sectors)
505
506 struct ata_eh_info {
507 struct ata_device *dev; /* offending device */
508 u32 serror; /* SError from LLDD */
509 unsigned int err_mask; /* port-wide err_mask */
510 unsigned int action; /* ATA_EH_* action mask */
511 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */
512 unsigned int flags; /* ATA_EHI_* flags */
513
514 unsigned long hotplug_timestamp;
515 unsigned int probe_mask;
516
517 char desc[ATA_EH_DESC_LEN];
518 int desc_len;
519 };
520
521 struct ata_eh_context {
522 struct ata_eh_info i;
523 int tries[ATA_MAX_DEVICES];
524 unsigned int classes[ATA_MAX_DEVICES];
525 unsigned int did_probe_mask;
526 };
527
528 struct ata_port {
529 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */
530 const struct ata_port_operations *ops;
531 spinlock_t *lock;
532 unsigned long flags; /* ATA_FLAG_xxx */
533 unsigned int pflags; /* ATA_PFLAG_xxx */
534 unsigned int id; /* unique id req'd by scsi midlyr */
535 unsigned int port_no; /* unique port #; from zero */
536
537 struct ata_prd *prd; /* our SG list */
538 dma_addr_t prd_dma; /* and its DMA mapping */
539
540 void *pad; /* array of DMA pad buffers */
541 dma_addr_t pad_dma;
542
543 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
544
545 u8 ctl; /* cache of ATA control register */
546 u8 last_ctl; /* Cache last written value */
547 unsigned int pio_mask;
548 unsigned int mwdma_mask;
549 unsigned int udma_mask;
550 unsigned int cbl; /* cable type; ATA_CBL_xxx */
551 unsigned int hw_sata_spd_limit;
552 unsigned int sata_spd_limit; /* SATA PHY speed limit */
553
554 /* record runtime error info, protected by host lock */
555 struct ata_eh_info eh_info;
556 /* EH context owned by EH */
557 struct ata_eh_context eh_context;
558
559 struct ata_device device[ATA_MAX_DEVICES];
560
561 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
562 unsigned long qc_allocated;
563 unsigned int qc_active;
564
565 unsigned int active_tag;
566 u32 sactive;
567
568 struct ata_port_stats stats;
569 struct ata_host *host;
570 struct device *dev;
571
572 void *port_task_data;
573 struct delayed_work port_task;
574 struct delayed_work hotplug_task;
575 struct work_struct scsi_rescan_task;
576
577 unsigned int hsm_task_state;
578
579 u32 msg_enable;
580 struct list_head eh_done_q;
581 wait_queue_head_t eh_wait_q;
582
583 pm_message_t pm_mesg;
584 int *pm_result;
585
586 void *private_data;
587
588 u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */
589 };
590
591 struct ata_port_operations {
592 void (*port_disable) (struct ata_port *);
593
594 void (*dev_config) (struct ata_port *, struct ata_device *);
595
596 void (*set_piomode) (struct ata_port *, struct ata_device *);
597 void (*set_dmamode) (struct ata_port *, struct ata_device *);
598 unsigned long (*mode_filter) (const struct ata_port *, struct ata_device *, unsigned long);
599
600 void (*tf_load) (struct ata_port *ap, const struct ata_taskfile *tf);
601 void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf);
602
603 void (*exec_command)(struct ata_port *ap, const struct ata_taskfile *tf);
604 u8 (*check_status)(struct ata_port *ap);
605 u8 (*check_altstatus)(struct ata_port *ap);
606 void (*dev_select)(struct ata_port *ap, unsigned int device);
607
608 void (*phy_reset) (struct ata_port *ap); /* obsolete */
609 int (*set_mode) (struct ata_port *ap, struct ata_device **r_failed_dev);
610
611 void (*post_set_mode) (struct ata_port *ap);
612
613 int (*check_atapi_dma) (struct ata_queued_cmd *qc);
614
615 void (*bmdma_setup) (struct ata_queued_cmd *qc);
616 void (*bmdma_start) (struct ata_queued_cmd *qc);
617
618 void (*data_xfer) (struct ata_device *, unsigned char *, unsigned int, int);
619
620 void (*qc_prep) (struct ata_queued_cmd *qc);
621 unsigned int (*qc_issue) (struct ata_queued_cmd *qc);
622
623 /* Error handlers. ->error_handler overrides ->eng_timeout and
624 * indicates that new-style EH is in place.
625 */
626 void (*eng_timeout) (struct ata_port *ap); /* obsolete */
627
628 void (*freeze) (struct ata_port *ap);
629 void (*thaw) (struct ata_port *ap);
630 void (*error_handler) (struct ata_port *ap);
631 void (*post_internal_cmd) (struct ata_queued_cmd *qc);
632
633 irq_handler_t irq_handler;
634 void (*irq_clear) (struct ata_port *);
635
636 u32 (*scr_read) (struct ata_port *ap, unsigned int sc_reg);
637 void (*scr_write) (struct ata_port *ap, unsigned int sc_reg,
638 u32 val);
639
640 int (*port_suspend) (struct ata_port *ap, pm_message_t mesg);
641 int (*port_resume) (struct ata_port *ap);
642
643 int (*port_start) (struct ata_port *ap);
644 void (*port_stop) (struct ata_port *ap);
645
646 void (*host_stop) (struct ata_host *host);
647
648 void (*bmdma_stop) (struct ata_queued_cmd *qc);
649 u8 (*bmdma_status) (struct ata_port *ap);
650 };
651
652 struct ata_port_info {
653 struct scsi_host_template *sht;
654 unsigned long flags;
655 unsigned long pio_mask;
656 unsigned long mwdma_mask;
657 unsigned long udma_mask;
658 const struct ata_port_operations *port_ops;
659 void *private_data;
660 };
661
662 struct ata_timing {
663 unsigned short mode; /* ATA mode */
664 unsigned short setup; /* t1 */
665 unsigned short act8b; /* t2 for 8-bit I/O */
666 unsigned short rec8b; /* t2i for 8-bit I/O */
667 unsigned short cyc8b; /* t0 for 8-bit I/O */
668 unsigned short active; /* t2 or tD */
669 unsigned short recover; /* t2i or tK */
670 unsigned short cycle; /* t0 */
671 unsigned short udma; /* t2CYCTYP/2 */
672 };
673
674 #define FIT(v,vmin,vmax) max_t(short,min_t(short,v,vmax),vmin)
675
676 extern const unsigned long sata_deb_timing_normal[];
677 extern const unsigned long sata_deb_timing_hotplug[];
678 extern const unsigned long sata_deb_timing_long[];
679
680 extern const struct ata_port_operations ata_dummy_port_ops;
681
682 static inline const unsigned long *
683 sata_ehc_deb_timing(struct ata_eh_context *ehc)
684 {
685 if (ehc->i.flags & ATA_EHI_HOTPLUGGED)
686 return sata_deb_timing_hotplug;
687 else
688 return sata_deb_timing_normal;
689 }
690
691 static inline int ata_port_is_dummy(struct ata_port *ap)
692 {
693 return ap->ops == &ata_dummy_port_ops;
694 }
695
696 extern void ata_port_probe(struct ata_port *);
697 extern void __sata_phy_reset(struct ata_port *ap);
698 extern void sata_phy_reset(struct ata_port *ap);
699 extern void ata_bus_reset(struct ata_port *ap);
700 extern int sata_set_spd(struct ata_port *ap);
701 extern int sata_phy_debounce(struct ata_port *ap, const unsigned long *param);
702 extern int sata_phy_resume(struct ata_port *ap, const unsigned long *param);
703 extern int ata_std_prereset(struct ata_port *ap);
704 extern int ata_std_softreset(struct ata_port *ap, unsigned int *classes);
705 extern int sata_port_hardreset(struct ata_port *ap,
706 const unsigned long *timing);
707 extern int sata_std_hardreset(struct ata_port *ap, unsigned int *class);
708 extern void ata_std_postreset(struct ata_port *ap, unsigned int *classes);
709 extern void ata_port_disable(struct ata_port *);
710 extern void ata_std_ports(struct ata_ioports *ioaddr);
711 #ifdef CONFIG_PCI
712 extern int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info,
713 unsigned int n_ports);
714 extern void ata_pci_remove_one (struct pci_dev *pdev);
715 extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg);
716 extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev);
717 extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
718 extern int ata_pci_device_resume(struct pci_dev *pdev);
719 extern int ata_pci_clear_simplex(struct pci_dev *pdev);
720 #endif /* CONFIG_PCI */
721 extern int ata_device_add(const struct ata_probe_ent *ent);
722 extern void ata_port_detach(struct ata_port *ap);
723 extern void ata_host_init(struct ata_host *, struct device *,
724 unsigned long, const struct ata_port_operations *);
725 extern void ata_host_remove(struct ata_host *host);
726 extern int ata_scsi_detect(struct scsi_host_template *sht);
727 extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
728 extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *));
729 extern int ata_scsi_release(struct Scsi_Host *host);
730 extern void ata_sas_port_destroy(struct ata_port *);
731 extern struct ata_port *ata_sas_port_alloc(struct ata_host *,
732 struct ata_port_info *, struct Scsi_Host *);
733 extern int ata_sas_port_init(struct ata_port *);
734 extern int ata_sas_port_start(struct ata_port *ap);
735 extern void ata_sas_port_stop(struct ata_port *ap);
736 extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *);
737 extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
738 struct ata_port *ap);
739 extern unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc);
740 extern int sata_scr_valid(struct ata_port *ap);
741 extern int sata_scr_read(struct ata_port *ap, int reg, u32 *val);
742 extern int sata_scr_write(struct ata_port *ap, int reg, u32 val);
743 extern int sata_scr_write_flush(struct ata_port *ap, int reg, u32 val);
744 extern int ata_port_online(struct ata_port *ap);
745 extern int ata_port_offline(struct ata_port *ap);
746 extern int ata_scsi_device_resume(struct scsi_device *);
747 extern int ata_scsi_device_suspend(struct scsi_device *, pm_message_t mesg);
748 extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg);
749 extern void ata_host_resume(struct ata_host *host);
750 extern int ata_ratelimit(void);
751 extern int ata_busy_sleep(struct ata_port *ap,
752 unsigned long timeout_pat, unsigned long timeout);
753 extern void ata_port_queue_task(struct ata_port *ap, work_func_t fn,
754 void *data, unsigned long delay);
755 extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
756 unsigned long interval_msec,
757 unsigned long timeout_msec);
758
759 /*
760 * Default driver ops implementations
761 */
762 extern void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
763 extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
764 extern void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp);
765 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
766 extern void ata_noop_dev_select (struct ata_port *ap, unsigned int device);
767 extern void ata_std_dev_select (struct ata_port *ap, unsigned int device);
768 extern u8 ata_check_status(struct ata_port *ap);
769 extern u8 ata_altstatus(struct ata_port *ap);
770 extern void ata_exec_command(struct ata_port *ap, const struct ata_taskfile *tf);
771 extern int ata_port_start (struct ata_port *ap);
772 extern void ata_port_stop (struct ata_port *ap);
773 extern void ata_host_stop (struct ata_host *host);
774 extern irqreturn_t ata_interrupt (int irq, void *dev_instance);
775 extern void ata_mmio_data_xfer(struct ata_device *adev, unsigned char *buf,
776 unsigned int buflen, int write_data);
777 extern void ata_pio_data_xfer(struct ata_device *adev, unsigned char *buf,
778 unsigned int buflen, int write_data);
779 extern void ata_pio_data_xfer_noirq(struct ata_device *adev, unsigned char *buf,
780 unsigned int buflen, int write_data);
781 extern void ata_qc_prep(struct ata_queued_cmd *qc);
782 extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
783 extern unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc);
784 extern void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf,
785 unsigned int buflen);
786 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
787 unsigned int n_elem);
788 extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
789 extern void ata_id_string(const u16 *id, unsigned char *s,
790 unsigned int ofs, unsigned int len);
791 extern void ata_id_c_string(const u16 *id, unsigned char *s,
792 unsigned int ofs, unsigned int len);
793 extern unsigned long ata_device_blacklisted(const struct ata_device *dev);
794 extern void ata_bmdma_setup (struct ata_queued_cmd *qc);
795 extern void ata_bmdma_start (struct ata_queued_cmd *qc);
796 extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
797 extern u8 ata_bmdma_status(struct ata_port *ap);
798 extern void ata_bmdma_irq_clear(struct ata_port *ap);
799 extern void ata_bmdma_freeze(struct ata_port *ap);
800 extern void ata_bmdma_thaw(struct ata_port *ap);
801 extern void ata_bmdma_drive_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
802 ata_reset_fn_t softreset,
803 ata_reset_fn_t hardreset,
804 ata_postreset_fn_t postreset);
805 extern void ata_bmdma_error_handler(struct ata_port *ap);
806 extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc);
807 extern int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
808 u8 status, int in_wq);
809 extern void ata_qc_complete(struct ata_queued_cmd *qc);
810 extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active,
811 void (*finish_qc)(struct ata_queued_cmd *));
812 extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
813 void (*done)(struct scsi_cmnd *));
814 extern int ata_std_bios_param(struct scsi_device *sdev,
815 struct block_device *bdev,
816 sector_t capacity, int geom[]);
817 extern int ata_scsi_slave_config(struct scsi_device *sdev);
818 extern void ata_scsi_slave_destroy(struct scsi_device *sdev);
819 extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
820 int queue_depth);
821 extern struct ata_device *ata_dev_pair(struct ata_device *adev);
822
823 /*
824 * Timing helpers
825 */
826
827 extern unsigned int ata_pio_need_iordy(const struct ata_device *);
828 extern int ata_timing_compute(struct ata_device *, unsigned short,
829 struct ata_timing *, int, int);
830 extern void ata_timing_merge(const struct ata_timing *,
831 const struct ata_timing *, struct ata_timing *,
832 unsigned int);
833
834 enum {
835 ATA_TIMING_SETUP = (1 << 0),
836 ATA_TIMING_ACT8B = (1 << 1),
837 ATA_TIMING_REC8B = (1 << 2),
838 ATA_TIMING_CYC8B = (1 << 3),
839 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
840 ATA_TIMING_CYC8B,
841 ATA_TIMING_ACTIVE = (1 << 4),
842 ATA_TIMING_RECOVER = (1 << 5),
843 ATA_TIMING_CYCLE = (1 << 6),
844 ATA_TIMING_UDMA = (1 << 7),
845 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
846 ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
847 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
848 ATA_TIMING_CYCLE | ATA_TIMING_UDMA,
849 };
850
851
852 #ifdef CONFIG_PCI
853 struct pci_bits {
854 unsigned int reg; /* PCI config register to read */
855 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
856 unsigned long mask;
857 unsigned long val;
858 };
859
860 extern void ata_pci_host_stop (struct ata_host *host);
861 extern struct ata_probe_ent *
862 ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port, int portmask);
863 extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
864 extern unsigned long ata_pci_default_filter(const struct ata_port *, struct ata_device *, unsigned long);
865 #endif /* CONFIG_PCI */
866
867 /*
868 * EH
869 */
870 extern void ata_eng_timeout(struct ata_port *ap);
871
872 extern void ata_port_schedule_eh(struct ata_port *ap);
873 extern int ata_port_abort(struct ata_port *ap);
874 extern int ata_port_freeze(struct ata_port *ap);
875
876 extern void ata_eh_freeze_port(struct ata_port *ap);
877 extern void ata_eh_thaw_port(struct ata_port *ap);
878
879 extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
880 extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
881
882 extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
883 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
884 ata_postreset_fn_t postreset);
885
886 /*
887 * printk helpers
888 */
889 #define ata_port_printk(ap, lv, fmt, args...) \
890 printk(lv"ata%u: "fmt, (ap)->id , ##args)
891
892 #define ata_dev_printk(dev, lv, fmt, args...) \
893 printk(lv"ata%u.%02u: "fmt, (dev)->ap->id, (dev)->devno , ##args)
894
895 /*
896 * ata_eh_info helpers
897 */
898 #define ata_ehi_push_desc(ehi, fmt, args...) do { \
899 (ehi)->desc_len += scnprintf((ehi)->desc + (ehi)->desc_len, \
900 ATA_EH_DESC_LEN - (ehi)->desc_len, \
901 fmt , ##args); \
902 } while (0)
903
904 #define ata_ehi_clear_desc(ehi) do { \
905 (ehi)->desc[0] = '\0'; \
906 (ehi)->desc_len = 0; \
907 } while (0)
908
909 static inline void __ata_ehi_hotplugged(struct ata_eh_info *ehi)
910 {
911 if (ehi->flags & ATA_EHI_HOTPLUGGED)
912 return;
913
914 ehi->flags |= ATA_EHI_HOTPLUGGED | ATA_EHI_RESUME_LINK;
915 ehi->hotplug_timestamp = jiffies;
916
917 ehi->action |= ATA_EH_SOFTRESET;
918 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
919 }
920
921 static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
922 {
923 __ata_ehi_hotplugged(ehi);
924 ehi->err_mask |= AC_ERR_ATA_BUS;
925 }
926
927 /*
928 * qc helpers
929 */
930 static inline int
931 ata_sg_is_last(struct scatterlist *sg, struct ata_queued_cmd *qc)
932 {
933 if (sg == &qc->pad_sgent)
934 return 1;
935 if (qc->pad_len)
936 return 0;
937 if (((sg - qc->__sg) + 1) == qc->n_elem)
938 return 1;
939 return 0;
940 }
941
942 static inline struct scatterlist *
943 ata_qc_first_sg(struct ata_queued_cmd *qc)
944 {
945 if (qc->n_elem)
946 return qc->__sg;
947 if (qc->pad_len)
948 return &qc->pad_sgent;
949 return NULL;
950 }
951
952 static inline struct scatterlist *
953 ata_qc_next_sg(struct scatterlist *sg, struct ata_queued_cmd *qc)
954 {
955 if (sg == &qc->pad_sgent)
956 return NULL;
957 if (++sg - qc->__sg < qc->n_elem)
958 return sg;
959 if (qc->pad_len)
960 return &qc->pad_sgent;
961 return NULL;
962 }
963
964 #define ata_for_each_sg(sg, qc) \
965 for (sg = ata_qc_first_sg(qc); sg; sg = ata_qc_next_sg(sg, qc))
966
967 static inline unsigned int ata_tag_valid(unsigned int tag)
968 {
969 return (tag < ATA_MAX_QUEUE) ? 1 : 0;
970 }
971
972 static inline unsigned int ata_tag_internal(unsigned int tag)
973 {
974 return tag == ATA_MAX_QUEUE - 1;
975 }
976
977 /*
978 * device helpers
979 */
980 static inline unsigned int ata_class_enabled(unsigned int class)
981 {
982 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI;
983 }
984
985 static inline unsigned int ata_class_disabled(unsigned int class)
986 {
987 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP;
988 }
989
990 static inline unsigned int ata_class_absent(unsigned int class)
991 {
992 return !ata_class_enabled(class) && !ata_class_disabled(class);
993 }
994
995 static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
996 {
997 return ata_class_enabled(dev->class);
998 }
999
1000 static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
1001 {
1002 return ata_class_disabled(dev->class);
1003 }
1004
1005 static inline unsigned int ata_dev_absent(const struct ata_device *dev)
1006 {
1007 return ata_class_absent(dev->class);
1008 }
1009
1010 static inline unsigned int ata_dev_ready(const struct ata_device *dev)
1011 {
1012 return ata_dev_enabled(dev) && !(dev->flags & ATA_DFLAG_SUSPENDED);
1013 }
1014
1015 /*
1016 * port helpers
1017 */
1018 static inline int ata_port_max_devices(const struct ata_port *ap)
1019 {
1020 if (ap->flags & ATA_FLAG_SLAVE_POSS)
1021 return 2;
1022 return 1;
1023 }
1024
1025
1026 static inline u8 ata_chk_status(struct ata_port *ap)
1027 {
1028 return ap->ops->check_status(ap);
1029 }
1030
1031
1032 /**
1033 * ata_pause - Flush writes and pause 400 nanoseconds.
1034 * @ap: Port to wait for.
1035 *
1036 * LOCKING:
1037 * Inherited from caller.
1038 */
1039
1040 static inline void ata_pause(struct ata_port *ap)
1041 {
1042 ata_altstatus(ap);
1043 ndelay(400);
1044 }
1045
1046
1047 /**
1048 * ata_busy_wait - Wait for a port status register
1049 * @ap: Port to wait for.
1050 * @bits: bits that must be clear
1051 * @max: number of 10uS waits to perform
1052 *
1053 * Waits up to max*10 microseconds for the selected bits in the port's
1054 * status register to be cleared.
1055 * Returns final value of status register.
1056 *
1057 * LOCKING:
1058 * Inherited from caller.
1059 */
1060
1061 static inline u8 ata_busy_wait(struct ata_port *ap, unsigned int bits,
1062 unsigned int max)
1063 {
1064 u8 status;
1065
1066 do {
1067 udelay(10);
1068 status = ata_chk_status(ap);
1069 max--;
1070 } while (status != 0xff && (status & bits) && (max > 0));
1071
1072 return status;
1073 }
1074
1075
1076 /**
1077 * ata_wait_idle - Wait for a port to be idle.
1078 * @ap: Port to wait for.
1079 *
1080 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
1081 * Returns final value of status register.
1082 *
1083 * LOCKING:
1084 * Inherited from caller.
1085 */
1086
1087 static inline u8 ata_wait_idle(struct ata_port *ap)
1088 {
1089 u8 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
1090
1091 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ))) {
1092 unsigned long l = ap->ioaddr.status_addr;
1093 if (ata_msg_warn(ap))
1094 printk(KERN_WARNING "ATA: abnormal status 0x%X on port 0x%lX\n",
1095 status, l);
1096 }
1097
1098 return status;
1099 }
1100
1101 static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
1102 {
1103 qc->tf.ctl |= ATA_NIEN;
1104 }
1105
1106 static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap,
1107 unsigned int tag)
1108 {
1109 if (likely(ata_tag_valid(tag)))
1110 return &ap->qcmd[tag];
1111 return NULL;
1112 }
1113
1114 static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap,
1115 unsigned int tag)
1116 {
1117 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
1118
1119 if (unlikely(!qc) || !ap->ops->error_handler)
1120 return qc;
1121
1122 if ((qc->flags & (ATA_QCFLAG_ACTIVE |
1123 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE)
1124 return qc;
1125
1126 return NULL;
1127 }
1128
1129 static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
1130 {
1131 memset(tf, 0, sizeof(*tf));
1132
1133 tf->ctl = dev->ap->ctl;
1134 if (dev->devno == 0)
1135 tf->device = ATA_DEVICE_OBS;
1136 else
1137 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
1138 }
1139
1140 static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
1141 {
1142 qc->dma_dir = DMA_NONE;
1143 qc->__sg = NULL;
1144 qc->flags = 0;
1145 qc->cursg = qc->cursg_ofs = 0;
1146 qc->nbytes = qc->curbytes = 0;
1147 qc->n_elem = 0;
1148 qc->err_mask = 0;
1149 qc->pad_len = 0;
1150
1151 ata_tf_init(qc->dev, &qc->tf);
1152
1153 /* init result_tf such that it indicates normal completion */
1154 qc->result_tf.command = ATA_DRDY;
1155 qc->result_tf.feature = 0;
1156 }
1157
1158 /**
1159 * ata_irq_ack - Acknowledge a device interrupt.
1160 * @ap: Port on which interrupts are enabled.
1161 *
1162 * Wait up to 10 ms for legacy IDE device to become idle (BUSY
1163 * or BUSY+DRQ clear). Obtain dma status and port status from
1164 * device. Clear the interrupt. Return port status.
1165 *
1166 * LOCKING:
1167 */
1168
1169 static inline u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq)
1170 {
1171 unsigned int bits = chk_drq ? ATA_BUSY | ATA_DRQ : ATA_BUSY;
1172 u8 host_stat, post_stat, status;
1173
1174 status = ata_busy_wait(ap, bits, 1000);
1175 if (status & bits)
1176 if (ata_msg_err(ap))
1177 printk(KERN_ERR "abnormal status 0x%X\n", status);
1178
1179 /* get controller status; clear intr, err bits */
1180 if (ap->flags & ATA_FLAG_MMIO) {
1181 void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr;
1182 host_stat = readb(mmio + ATA_DMA_STATUS);
1183 writeb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR,
1184 mmio + ATA_DMA_STATUS);
1185
1186 post_stat = readb(mmio + ATA_DMA_STATUS);
1187 } else {
1188 host_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
1189 outb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR,
1190 ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
1191
1192 post_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
1193 }
1194
1195 if (ata_msg_intr(ap))
1196 printk(KERN_INFO "%s: irq ack: host_stat 0x%X, new host_stat 0x%X, drv_stat 0x%X\n",
1197 __FUNCTION__,
1198 host_stat, post_stat, status);
1199
1200 return status;
1201 }
1202
1203 static inline int ata_try_flush_cache(const struct ata_device *dev)
1204 {
1205 return ata_id_wcache_enabled(dev->id) ||
1206 ata_id_has_flush(dev->id) ||
1207 ata_id_has_flush_ext(dev->id);
1208 }
1209
1210 static inline unsigned int ac_err_mask(u8 status)
1211 {
1212 if (status & (ATA_BUSY | ATA_DRQ))
1213 return AC_ERR_HSM;
1214 if (status & (ATA_ERR | ATA_DF))
1215 return AC_ERR_DEV;
1216 return 0;
1217 }
1218
1219 static inline unsigned int __ac_err_mask(u8 status)
1220 {
1221 unsigned int mask = ac_err_mask(status);
1222 if (mask == 0)
1223 return AC_ERR_OTHER;
1224 return mask;
1225 }
1226
1227 static inline int ata_pad_alloc(struct ata_port *ap, struct device *dev)
1228 {
1229 ap->pad_dma = 0;
1230 ap->pad = dma_alloc_coherent(dev, ATA_DMA_PAD_BUF_SZ,
1231 &ap->pad_dma, GFP_KERNEL);
1232 return (ap->pad == NULL) ? -ENOMEM : 0;
1233 }
1234
1235 static inline void ata_pad_free(struct ata_port *ap, struct device *dev)
1236 {
1237 dma_free_coherent(dev, ATA_DMA_PAD_BUF_SZ, ap->pad, ap->pad_dma);
1238 }
1239
1240 static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
1241 {
1242 return (struct ata_port *) &host->hostdata[0];
1243 }
1244
1245 #endif /* __LINUX_LIBATA_H__ */
Linux kernel - Deliverables
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