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HPT374 is UDMA100 not UDMA133
[deliverable/linux.git] / include / linux / libata.h
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1/*
2 * Copyright 2003-2005 Red Hat, Inc. All rights reserved.
3 * Copyright 2003-2005 Jeff Garzik
4 *
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2, or (at your option)
9 * any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; see the file COPYING. If not, write to
18 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
19 *
20 *
21 * libata documentation is available via 'make {ps|pdf}docs',
22 * as Documentation/DocBook/libata.*
23 *
24 */
25
26#ifndef __LINUX_LIBATA_H__
27#define __LINUX_LIBATA_H__
28
29#include <linux/delay.h>
30#include <linux/interrupt.h>
31#include <linux/pci.h>
32#include <linux/dma-mapping.h>
33#include <asm/scatterlist.h>
34#include <linux/io.h>
35#include <linux/ata.h>
36#include <linux/workqueue.h>
37#include <scsi/scsi_host.h>
38#include <linux/acpi.h>
39
40/*
41 * Define if arch has non-standard setup. This is a _PCI_ standard
42 * not a legacy or ISA standard.
43 */
44#ifdef CONFIG_ATA_NONSTANDARD
45#include <asm/libata-portmap.h>
46#else
47#include <asm-generic/libata-portmap.h>
48#endif
49
50/*
51 * compile-time options: to be removed as soon as all the drivers are
52 * converted to the new debugging mechanism
53 */
54#undef ATA_DEBUG /* debugging output */
55#undef ATA_VERBOSE_DEBUG /* yet more debugging output */
56#undef ATA_IRQ_TRAP /* define to ack screaming irqs */
57#undef ATA_NDEBUG /* define to disable quick runtime checks */
58
59
60/* note: prints function name for you */
61#ifdef ATA_DEBUG
62#define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
63#ifdef ATA_VERBOSE_DEBUG
64#define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
65#else
66#define VPRINTK(fmt, args...)
67#endif /* ATA_VERBOSE_DEBUG */
68#else
69#define DPRINTK(fmt, args...)
70#define VPRINTK(fmt, args...)
71#endif /* ATA_DEBUG */
72
73#define BPRINTK(fmt, args...) if (ap->flags & ATA_FLAG_DEBUGMSG) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
74
75/* NEW: debug levels */
76#define HAVE_LIBATA_MSG 1
77
78enum {
79 ATA_MSG_DRV = 0x0001,
80 ATA_MSG_INFO = 0x0002,
81 ATA_MSG_PROBE = 0x0004,
82 ATA_MSG_WARN = 0x0008,
83 ATA_MSG_MALLOC = 0x0010,
84 ATA_MSG_CTL = 0x0020,
85 ATA_MSG_INTR = 0x0040,
86 ATA_MSG_ERR = 0x0080,
87};
88
89#define ata_msg_drv(p) ((p)->msg_enable & ATA_MSG_DRV)
90#define ata_msg_info(p) ((p)->msg_enable & ATA_MSG_INFO)
91#define ata_msg_probe(p) ((p)->msg_enable & ATA_MSG_PROBE)
92#define ata_msg_warn(p) ((p)->msg_enable & ATA_MSG_WARN)
93#define ata_msg_malloc(p) ((p)->msg_enable & ATA_MSG_MALLOC)
94#define ata_msg_ctl(p) ((p)->msg_enable & ATA_MSG_CTL)
95#define ata_msg_intr(p) ((p)->msg_enable & ATA_MSG_INTR)
96#define ata_msg_err(p) ((p)->msg_enable & ATA_MSG_ERR)
97
98static inline u32 ata_msg_init(int dval, int default_msg_enable_bits)
99{
100 if (dval < 0 || dval >= (sizeof(u32) * 8))
101 return default_msg_enable_bits; /* should be 0x1 - only driver info msgs */
102 if (!dval)
103 return 0;
104 return (1 << dval) - 1;
105}
106
107/* defines only for the constants which don't work well as enums */
108#define ATA_TAG_POISON 0xfafbfcfdU
109
110/* move to PCI layer? */
111static inline struct device *pci_dev_to_dev(struct pci_dev *pdev)
112{
113 return &pdev->dev;
114}
115
116enum {
117 /* various global constants */
118 LIBATA_MAX_PRD = ATA_MAX_PRD / 2,
119 ATA_MAX_PORTS = 8,
120 ATA_DEF_QUEUE = 1,
121 /* tag ATA_MAX_QUEUE - 1 is reserved for internal commands */
122 ATA_MAX_QUEUE = 32,
123 ATA_TAG_INTERNAL = ATA_MAX_QUEUE - 1,
124 ATA_MAX_BUS = 2,
125 ATA_DEF_BUSY_WAIT = 10000,
126 ATA_SHORT_PAUSE = (HZ >> 6) + 1,
127
128 ATA_SHT_EMULATED = 1,
129 ATA_SHT_CMD_PER_LUN = 1,
130 ATA_SHT_THIS_ID = -1,
131 ATA_SHT_USE_CLUSTERING = 1,
132
133 /* struct ata_device stuff */
134 ATA_DFLAG_LBA = (1 << 0), /* device supports LBA */
135 ATA_DFLAG_LBA48 = (1 << 1), /* device supports LBA48 */
136 ATA_DFLAG_CDB_INTR = (1 << 2), /* device asserts INTRQ when ready for CDB */
137 ATA_DFLAG_NCQ = (1 << 3), /* device supports NCQ */
138 ATA_DFLAG_FLUSH_EXT = (1 << 4), /* do FLUSH_EXT instead of FLUSH */
139 ATA_DFLAG_CFG_MASK = (1 << 8) - 1,
140
141 ATA_DFLAG_PIO = (1 << 8), /* device limited to PIO mode */
142 ATA_DFLAG_NCQ_OFF = (1 << 9), /* device limited to non-NCQ mode */
143 ATA_DFLAG_SPUNDOWN = (1 << 10), /* XXX: for spindown_compat */
144 ATA_DFLAG_INIT_MASK = (1 << 16) - 1,
145
146 ATA_DFLAG_DETACH = (1 << 16),
147 ATA_DFLAG_DETACHED = (1 << 17),
148
149 ATA_DEV_UNKNOWN = 0, /* unknown device */
150 ATA_DEV_ATA = 1, /* ATA device */
151 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */
152 ATA_DEV_ATAPI = 3, /* ATAPI device */
153 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */
154 ATA_DEV_NONE = 5, /* no device */
155
156 /* struct ata_port flags */
157 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */
158 /* (doesn't imply presence) */
159 ATA_FLAG_SATA = (1 << 1),
160 ATA_FLAG_NO_LEGACY = (1 << 2), /* no legacy mode check */
161 ATA_FLAG_MMIO = (1 << 3), /* use MMIO, not PIO */
162 ATA_FLAG_SRST = (1 << 4), /* (obsolete) use ATA SRST, not E.D.D. */
163 ATA_FLAG_SATA_RESET = (1 << 5), /* (obsolete) use COMRESET */
164 ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */
165 ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */
166 ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */
167 ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD
168 * doesn't handle PIO interrupts */
169 ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */
170 ATA_FLAG_HRST_TO_RESUME = (1 << 11), /* hardreset to resume phy */
171 ATA_FLAG_SKIP_D2H_BSY = (1 << 12), /* can't wait for the first D2H
172 * Register FIS clearing BSY */
173 ATA_FLAG_DEBUGMSG = (1 << 13),
174 ATA_FLAG_IGN_SIMPLEX = (1 << 15), /* ignore SIMPLEX */
175 ATA_FLAG_NO_IORDY = (1 << 16), /* controller lacks iordy */
176 ATA_FLAG_ACPI_SATA = (1 << 17), /* need native SATA ACPI layout */
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 ATA_PFLAG_INITIALIZING = (1 << 7), /* being initialized, don't touch */
195
196 ATA_PFLAG_FLUSH_PORT_TASK = (1 << 16), /* flush port task */
197 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */
198 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */
199
200 /* struct ata_queued_cmd flags */
201 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */
202 ATA_QCFLAG_SG = (1 << 1), /* have s/g table? */
203 ATA_QCFLAG_SINGLE = (1 << 2), /* no s/g, just a single buffer */
204 ATA_QCFLAG_DMAMAP = ATA_QCFLAG_SG | ATA_QCFLAG_SINGLE,
205 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */
206 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */
207
208 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */
209 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */
210 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */
211
212 /* host set flags */
213 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */
214 ATA_HOST_STARTED = (1 << 1), /* Host started */
215
216 /* various lengths of time */
217 ATA_TMOUT_BOOT = 30 * HZ, /* heuristic */
218 ATA_TMOUT_BOOT_QUICK = 7 * HZ, /* heuristic */
219 ATA_TMOUT_INTERNAL = 30 * HZ,
220 ATA_TMOUT_INTERNAL_QUICK = 5 * HZ,
221
222 /* ATA bus states */
223 BUS_UNKNOWN = 0,
224 BUS_DMA = 1,
225 BUS_IDLE = 2,
226 BUS_NOINTR = 3,
227 BUS_NODATA = 4,
228 BUS_TIMER = 5,
229 BUS_PIO = 6,
230 BUS_EDD = 7,
231 BUS_IDENTIFY = 8,
232 BUS_PACKET = 9,
233
234 /* SATA port states */
235 PORT_UNKNOWN = 0,
236 PORT_ENABLED = 1,
237 PORT_DISABLED = 2,
238
239 /* encoding various smaller bitmaps into a single
240 * unsigned int bitmap
241 */
242 ATA_BITS_PIO = 7,
243 ATA_BITS_MWDMA = 5,
244 ATA_BITS_UDMA = 8,
245
246 ATA_SHIFT_PIO = 0,
247 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_BITS_PIO,
248 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_BITS_MWDMA,
249
250 ATA_MASK_PIO = ((1 << ATA_BITS_PIO) - 1) << ATA_SHIFT_PIO,
251 ATA_MASK_MWDMA = ((1 << ATA_BITS_MWDMA) - 1) << ATA_SHIFT_MWDMA,
252 ATA_MASK_UDMA = ((1 << ATA_BITS_UDMA) - 1) << ATA_SHIFT_UDMA,
253
254 /* size of buffer to pad xfers ending on unaligned boundaries */
255 ATA_DMA_PAD_SZ = 4,
256 ATA_DMA_PAD_BUF_SZ = ATA_DMA_PAD_SZ * ATA_MAX_QUEUE,
257
258 /* ering size */
259 ATA_ERING_SIZE = 32,
260
261 /* desc_len for ata_eh_info and context */
262 ATA_EH_DESC_LEN = 80,
263
264 /* reset / recovery action types */
265 ATA_EH_REVALIDATE = (1 << 0),
266 ATA_EH_SOFTRESET = (1 << 1),
267 ATA_EH_HARDRESET = (1 << 2),
268
269 ATA_EH_RESET_MASK = ATA_EH_SOFTRESET | ATA_EH_HARDRESET,
270 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE,
271
272 /* ata_eh_info->flags */
273 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */
274 ATA_EHI_RESUME_LINK = (1 << 1), /* resume link (reset modifier) */
275 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */
276 ATA_EHI_QUIET = (1 << 3), /* be quiet */
277
278 ATA_EHI_DID_SOFTRESET = (1 << 16), /* already soft-reset this port */
279 ATA_EHI_DID_HARDRESET = (1 << 17), /* already soft-reset this port */
280 ATA_EHI_PRINTINFO = (1 << 18), /* print configuration info */
281 ATA_EHI_SETMODE = (1 << 19), /* configure transfer mode */
282 ATA_EHI_POST_SETMODE = (1 << 20), /* revaildating after setmode */
283
284 ATA_EHI_DID_RESET = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET,
285 ATA_EHI_RESET_MODIFIER_MASK = ATA_EHI_RESUME_LINK,
286
287 /* max repeat if error condition is still set after ->error_handler */
288 ATA_EH_MAX_REPEAT = 5,
289
290 /* how hard are we gonna try to probe/recover devices */
291 ATA_PROBE_MAX_TRIES = 3,
292 ATA_EH_DEV_TRIES = 3,
293
294 /* Horkage types. May be set by libata or controller on drives
295 (some horkage may be drive/controller pair dependant */
296
297 ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */
298 ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */
299 ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */
300 ATA_HORKAGE_MAX_SEC_128 = (1 << 3), /* Limit max sects to 128 */
301 ATA_HORKAGE_DMA_RW_ONLY = (1 << 4), /* ATAPI DMA for RW only */
302};
303
304enum hsm_task_states {
305 HSM_ST_IDLE, /* no command on going */
306 HSM_ST_FIRST, /* (waiting the device to)
307 write CDB or first data block */
308 HSM_ST, /* (waiting the device to) transfer data */
309 HSM_ST_LAST, /* (waiting the device to) complete command */
310 HSM_ST_ERR, /* error */
311};
312
313enum ata_completion_errors {
314 AC_ERR_DEV = (1 << 0), /* device reported error */
315 AC_ERR_HSM = (1 << 1), /* host state machine violation */
316 AC_ERR_TIMEOUT = (1 << 2), /* timeout */
317 AC_ERR_MEDIA = (1 << 3), /* media error */
318 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */
319 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */
320 AC_ERR_SYSTEM = (1 << 6), /* system error */
321 AC_ERR_INVALID = (1 << 7), /* invalid argument */
322 AC_ERR_OTHER = (1 << 8), /* unknown */
323 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */
324};
325
326/* forward declarations */
327struct scsi_device;
328struct ata_port_operations;
329struct ata_port;
330struct ata_queued_cmd;
331
332/* typedefs */
333typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
334typedef int (*ata_prereset_fn_t)(struct ata_port *ap, unsigned long deadline);
335typedef int (*ata_reset_fn_t)(struct ata_port *ap, unsigned int *classes,
336 unsigned long deadline);
337typedef void (*ata_postreset_fn_t)(struct ata_port *ap, unsigned int *classes);
338
339struct ata_ioports {
340 void __iomem *cmd_addr;
341 void __iomem *data_addr;
342 void __iomem *error_addr;
343 void __iomem *feature_addr;
344 void __iomem *nsect_addr;
345 void __iomem *lbal_addr;
346 void __iomem *lbam_addr;
347 void __iomem *lbah_addr;
348 void __iomem *device_addr;
349 void __iomem *status_addr;
350 void __iomem *command_addr;
351 void __iomem *altstatus_addr;
352 void __iomem *ctl_addr;
353 void __iomem *bmdma_addr;
354 void __iomem *scr_addr;
355};
356
357struct ata_host {
358 spinlock_t lock;
359 struct device *dev;
360 unsigned long irq;
361 unsigned long irq2;
362 void __iomem * const *iomap;
363 unsigned int n_ports;
364 void *private_data;
365 const struct ata_port_operations *ops;
366 unsigned long flags;
367 struct ata_port *simplex_claimed; /* channel owning the DMA */
368 struct ata_port *ports[0];
369};
370
371struct ata_queued_cmd {
372 struct ata_port *ap;
373 struct ata_device *dev;
374
375 struct scsi_cmnd *scsicmd;
376 void (*scsidone)(struct scsi_cmnd *);
377
378 struct ata_taskfile tf;
379 u8 cdb[ATAPI_CDB_LEN];
380
381 unsigned long flags; /* ATA_QCFLAG_xxx */
382 unsigned int tag;
383 unsigned int n_elem;
384 unsigned int orig_n_elem;
385
386 int dma_dir;
387
388 unsigned int pad_len;
389 unsigned int sect_size;
390
391 unsigned int nbytes;
392 unsigned int curbytes;
393
394 unsigned int cursg;
395 unsigned int cursg_ofs;
396
397 struct scatterlist sgent;
398 struct scatterlist pad_sgent;
399 void *buf_virt;
400
401 /* DO NOT iterate over __sg manually, use ata_for_each_sg() */
402 struct scatterlist *__sg;
403
404 unsigned int err_mask;
405 struct ata_taskfile result_tf;
406 ata_qc_cb_t complete_fn;
407
408 void *private_data;
409};
410
411struct ata_port_stats {
412 unsigned long unhandled_irq;
413 unsigned long idle_irq;
414 unsigned long rw_reqbuf;
415};
416
417struct ata_ering_entry {
418 int is_io;
419 unsigned int err_mask;
420 u64 timestamp;
421};
422
423struct ata_ering {
424 int cursor;
425 struct ata_ering_entry ring[ATA_ERING_SIZE];
426};
427
428struct ata_device {
429 struct ata_port *ap;
430 unsigned int devno; /* 0 or 1 */
431 unsigned long flags; /* ATA_DFLAG_xxx */
432 struct scsi_device *sdev; /* attached SCSI device */
433 /* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */
434 u64 n_sectors; /* size of device, if ATA */
435 unsigned int class; /* ATA_DEV_xxx */
436 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
437 u8 pio_mode;
438 u8 dma_mode;
439 u8 xfer_mode;
440 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
441
442 unsigned int multi_count; /* sectors count for
443 READ/WRITE MULTIPLE */
444 unsigned int max_sectors; /* per-device max sectors */
445 unsigned int cdb_len;
446
447 /* per-dev xfer mask */
448 unsigned int pio_mask;
449 unsigned int mwdma_mask;
450 unsigned int udma_mask;
451
452 /* for CHS addressing */
453 u16 cylinders; /* Number of cylinders */
454 u16 heads; /* Number of heads */
455 u16 sectors; /* Number of sectors per track */
456
457 /* error history */
458 struct ata_ering ering;
459 int spdn_cnt;
460 unsigned int horkage; /* List of broken features */
461#ifdef CONFIG_ATA_ACPI
462 /* ACPI objects info */
463 acpi_handle obj_handle;
464#endif
465};
466
467/* Offset into struct ata_device. Fields above it are maintained
468 * acress device init. Fields below are zeroed.
469 */
470#define ATA_DEVICE_CLEAR_OFFSET offsetof(struct ata_device, n_sectors)
471
472struct ata_eh_info {
473 struct ata_device *dev; /* offending device */
474 u32 serror; /* SError from LLDD */
475 unsigned int err_mask; /* port-wide err_mask */
476 unsigned int action; /* ATA_EH_* action mask */
477 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */
478 unsigned int flags; /* ATA_EHI_* flags */
479
480 unsigned int probe_mask;
481
482 char desc[ATA_EH_DESC_LEN];
483 int desc_len;
484};
485
486struct ata_eh_context {
487 struct ata_eh_info i;
488 int tries[ATA_MAX_DEVICES];
489 unsigned int classes[ATA_MAX_DEVICES];
490 unsigned int did_probe_mask;
491};
492
493struct ata_port {
494 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */
495 const struct ata_port_operations *ops;
496 spinlock_t *lock;
497 unsigned long flags; /* ATA_FLAG_xxx */
498 unsigned int pflags; /* ATA_PFLAG_xxx */
499 unsigned int print_id; /* user visible unique port ID */
500 unsigned int port_no; /* 0 based port no. inside the host */
501
502 struct ata_prd *prd; /* our SG list */
503 dma_addr_t prd_dma; /* and its DMA mapping */
504
505 void *pad; /* array of DMA pad buffers */
506 dma_addr_t pad_dma;
507
508 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
509
510 u8 ctl; /* cache of ATA control register */
511 u8 last_ctl; /* Cache last written value */
512 unsigned int pio_mask;
513 unsigned int mwdma_mask;
514 unsigned int udma_mask;
515 unsigned int cbl; /* cable type; ATA_CBL_xxx */
516 unsigned int hw_sata_spd_limit;
517 unsigned int sata_spd_limit; /* SATA PHY speed limit */
518
519 /* record runtime error info, protected by host lock */
520 struct ata_eh_info eh_info;
521 /* EH context owned by EH */
522 struct ata_eh_context eh_context;
523
524 struct ata_device device[ATA_MAX_DEVICES];
525
526 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
527 unsigned long qc_allocated;
528 unsigned int qc_active;
529
530 unsigned int active_tag;
531 u32 sactive;
532
533 struct ata_port_stats stats;
534 struct ata_host *host;
535 struct device *dev;
536
537 void *port_task_data;
538 struct delayed_work port_task;
539 struct delayed_work hotplug_task;
540 struct work_struct scsi_rescan_task;
541
542 unsigned int hsm_task_state;
543
544 u32 msg_enable;
545 struct list_head eh_done_q;
546 wait_queue_head_t eh_wait_q;
547
548 pm_message_t pm_mesg;
549 int *pm_result;
550
551 void *private_data;
552
553 u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */
554};
555
556struct ata_port_operations {
557 void (*port_disable) (struct ata_port *);
558
559 void (*dev_config) (struct ata_device *);
560
561 void (*set_piomode) (struct ata_port *, struct ata_device *);
562 void (*set_dmamode) (struct ata_port *, struct ata_device *);
563 unsigned long (*mode_filter) (struct ata_device *, unsigned long);
564
565 void (*tf_load) (struct ata_port *ap, const struct ata_taskfile *tf);
566 void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf);
567
568 void (*exec_command)(struct ata_port *ap, const struct ata_taskfile *tf);
569 u8 (*check_status)(struct ata_port *ap);
570 u8 (*check_altstatus)(struct ata_port *ap);
571 void (*dev_select)(struct ata_port *ap, unsigned int device);
572
573 void (*phy_reset) (struct ata_port *ap); /* obsolete */
574 int (*set_mode) (struct ata_port *ap, struct ata_device **r_failed_dev);
575
576 int (*cable_detect) (struct ata_port *ap);
577
578 int (*check_atapi_dma) (struct ata_queued_cmd *qc);
579
580 void (*bmdma_setup) (struct ata_queued_cmd *qc);
581 void (*bmdma_start) (struct ata_queued_cmd *qc);
582
583 void (*data_xfer) (struct ata_device *, unsigned char *, unsigned int, int);
584
585 void (*qc_prep) (struct ata_queued_cmd *qc);
586 unsigned int (*qc_issue) (struct ata_queued_cmd *qc);
587
588 /* Error handlers. ->error_handler overrides ->eng_timeout and
589 * indicates that new-style EH is in place.
590 */
591 void (*eng_timeout) (struct ata_port *ap); /* obsolete */
592
593 void (*freeze) (struct ata_port *ap);
594 void (*thaw) (struct ata_port *ap);
595 void (*error_handler) (struct ata_port *ap);
596 void (*post_internal_cmd) (struct ata_queued_cmd *qc);
597
598 irq_handler_t irq_handler;
599 void (*irq_clear) (struct ata_port *);
600 u8 (*irq_on) (struct ata_port *);
601 u8 (*irq_ack) (struct ata_port *ap, unsigned int chk_drq);
602
603 u32 (*scr_read) (struct ata_port *ap, unsigned int sc_reg);
604 void (*scr_write) (struct ata_port *ap, unsigned int sc_reg,
605 u32 val);
606
607 int (*port_suspend) (struct ata_port *ap, pm_message_t mesg);
608 int (*port_resume) (struct ata_port *ap);
609
610 int (*port_start) (struct ata_port *ap);
611 void (*port_stop) (struct ata_port *ap);
612
613 void (*host_stop) (struct ata_host *host);
614
615 void (*bmdma_stop) (struct ata_queued_cmd *qc);
616 u8 (*bmdma_status) (struct ata_port *ap);
617};
618
619struct ata_port_info {
620 struct scsi_host_template *sht;
621 unsigned long flags;
622 unsigned long pio_mask;
623 unsigned long mwdma_mask;
624 unsigned long udma_mask;
625 const struct ata_port_operations *port_ops;
626 irq_handler_t irq_handler;
627 void *private_data;
628};
629
630struct ata_timing {
631 unsigned short mode; /* ATA mode */
632 unsigned short setup; /* t1 */
633 unsigned short act8b; /* t2 for 8-bit I/O */
634 unsigned short rec8b; /* t2i for 8-bit I/O */
635 unsigned short cyc8b; /* t0 for 8-bit I/O */
636 unsigned short active; /* t2 or tD */
637 unsigned short recover; /* t2i or tK */
638 unsigned short cycle; /* t0 */
639 unsigned short udma; /* t2CYCTYP/2 */
640};
641
642#define FIT(v,vmin,vmax) max_t(short,min_t(short,v,vmax),vmin)
643
644extern const unsigned long sata_deb_timing_normal[];
645extern const unsigned long sata_deb_timing_hotplug[];
646extern const unsigned long sata_deb_timing_long[];
647
648extern const struct ata_port_operations ata_dummy_port_ops;
649extern const struct ata_port_info ata_dummy_port_info;
650
651static inline const unsigned long *
652sata_ehc_deb_timing(struct ata_eh_context *ehc)
653{
654 if (ehc->i.flags & ATA_EHI_HOTPLUGGED)
655 return sata_deb_timing_hotplug;
656 else
657 return sata_deb_timing_normal;
658}
659
660static inline int ata_port_is_dummy(struct ata_port *ap)
661{
662 return ap->ops == &ata_dummy_port_ops;
663}
664
665extern void sata_print_link_status(struct ata_port *ap);
666extern void ata_port_probe(struct ata_port *);
667extern void __sata_phy_reset(struct ata_port *ap);
668extern void sata_phy_reset(struct ata_port *ap);
669extern void ata_bus_reset(struct ata_port *ap);
670extern int sata_set_spd(struct ata_port *ap);
671extern int sata_phy_debounce(struct ata_port *ap, const unsigned long *param,
672 unsigned long deadline);
673extern int sata_phy_resume(struct ata_port *ap, const unsigned long *param,
674 unsigned long deadline);
675extern int ata_std_prereset(struct ata_port *ap, unsigned long deadline);
676extern int ata_std_softreset(struct ata_port *ap, unsigned int *classes,
677 unsigned long deadline);
678extern int sata_port_hardreset(struct ata_port *ap, const unsigned long *timing,
679 unsigned long deadline);
680extern int sata_std_hardreset(struct ata_port *ap, unsigned int *class,
681 unsigned long deadline);
682extern void ata_std_postreset(struct ata_port *ap, unsigned int *classes);
683extern void ata_port_disable(struct ata_port *);
684extern void ata_std_ports(struct ata_ioports *ioaddr);
685#ifdef CONFIG_PCI
686extern int ata_pci_init_one (struct pci_dev *pdev,
687 const struct ata_port_info * const * ppi);
688extern void ata_pci_remove_one (struct pci_dev *pdev);
689#ifdef CONFIG_PM
690extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg);
691extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev);
692extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
693extern int ata_pci_device_resume(struct pci_dev *pdev);
694#endif
695extern int ata_pci_clear_simplex(struct pci_dev *pdev);
696#endif /* CONFIG_PCI */
697extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports);
698extern struct ata_host *ata_host_alloc_pinfo(struct device *dev,
699 const struct ata_port_info * const * ppi, int n_ports);
700extern int ata_host_start(struct ata_host *host);
701extern int ata_host_register(struct ata_host *host,
702 struct scsi_host_template *sht);
703extern int ata_host_activate(struct ata_host *host, int irq,
704 irq_handler_t irq_handler, unsigned long irq_flags,
705 struct scsi_host_template *sht);
706extern void ata_host_detach(struct ata_host *host);
707extern void ata_host_init(struct ata_host *, struct device *,
708 unsigned long, const struct ata_port_operations *);
709extern int ata_scsi_detect(struct scsi_host_template *sht);
710extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
711extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *));
712extern void ata_sas_port_destroy(struct ata_port *);
713extern struct ata_port *ata_sas_port_alloc(struct ata_host *,
714 struct ata_port_info *, struct Scsi_Host *);
715extern int ata_sas_port_init(struct ata_port *);
716extern int ata_sas_port_start(struct ata_port *ap);
717extern void ata_sas_port_stop(struct ata_port *ap);
718extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *);
719extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
720 struct ata_port *ap);
721extern unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc);
722extern int sata_scr_valid(struct ata_port *ap);
723extern int sata_scr_read(struct ata_port *ap, int reg, u32 *val);
724extern int sata_scr_write(struct ata_port *ap, int reg, u32 val);
725extern int sata_scr_write_flush(struct ata_port *ap, int reg, u32 val);
726extern int ata_port_online(struct ata_port *ap);
727extern int ata_port_offline(struct ata_port *ap);
728#ifdef CONFIG_PM
729extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg);
730extern void ata_host_resume(struct ata_host *host);
731#endif
732extern int ata_ratelimit(void);
733extern int ata_busy_sleep(struct ata_port *ap,
734 unsigned long timeout_pat, unsigned long timeout);
735extern int ata_wait_ready(struct ata_port *ap, unsigned long deadline);
736extern void ata_port_queue_task(struct ata_port *ap, work_func_t fn,
737 void *data, unsigned long delay);
738extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
739 unsigned long interval_msec,
740 unsigned long timeout_msec);
741extern unsigned int ata_dev_try_classify(struct ata_port *, unsigned int, u8 *);
742
743/*
744 * Default driver ops implementations
745 */
746extern void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
747extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
748extern void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp);
749extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
750extern void ata_noop_dev_select (struct ata_port *ap, unsigned int device);
751extern void ata_std_dev_select (struct ata_port *ap, unsigned int device);
752extern u8 ata_check_status(struct ata_port *ap);
753extern u8 ata_altstatus(struct ata_port *ap);
754extern void ata_exec_command(struct ata_port *ap, const struct ata_taskfile *tf);
755extern int ata_port_start (struct ata_port *ap);
756extern int ata_sff_port_start (struct ata_port *ap);
757extern irqreturn_t ata_interrupt (int irq, void *dev_instance);
758extern void ata_data_xfer(struct ata_device *adev, unsigned char *buf,
759 unsigned int buflen, int write_data);
760extern void ata_data_xfer_noirq(struct ata_device *adev, unsigned char *buf,
761 unsigned int buflen, int write_data);
762extern void ata_qc_prep(struct ata_queued_cmd *qc);
763extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
764extern unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc);
765extern void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf,
766 unsigned int buflen);
767extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
768 unsigned int n_elem);
769extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
770extern void ata_dev_disable(struct ata_device *adev);
771extern void ata_id_string(const u16 *id, unsigned char *s,
772 unsigned int ofs, unsigned int len);
773extern void ata_id_c_string(const u16 *id, unsigned char *s,
774 unsigned int ofs, unsigned int len);
775extern void ata_id_to_dma_mode(struct ata_device *dev, u8 unknown);
776extern unsigned long ata_device_blacklisted(const struct ata_device *dev);
777extern void ata_bmdma_setup (struct ata_queued_cmd *qc);
778extern void ata_bmdma_start (struct ata_queued_cmd *qc);
779extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
780extern u8 ata_bmdma_status(struct ata_port *ap);
781extern void ata_bmdma_irq_clear(struct ata_port *ap);
782extern void ata_bmdma_freeze(struct ata_port *ap);
783extern void ata_bmdma_thaw(struct ata_port *ap);
784extern void ata_bmdma_drive_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
785 ata_reset_fn_t softreset,
786 ata_reset_fn_t hardreset,
787 ata_postreset_fn_t postreset);
788extern void ata_bmdma_error_handler(struct ata_port *ap);
789extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc);
790extern int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
791 u8 status, int in_wq);
792extern void ata_qc_complete(struct ata_queued_cmd *qc);
793extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active,
794 void (*finish_qc)(struct ata_queued_cmd *));
795extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
796 void (*done)(struct scsi_cmnd *));
797extern int ata_std_bios_param(struct scsi_device *sdev,
798 struct block_device *bdev,
799 sector_t capacity, int geom[]);
800extern int ata_scsi_slave_config(struct scsi_device *sdev);
801extern void ata_scsi_slave_destroy(struct scsi_device *sdev);
802extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
803 int queue_depth);
804extern struct ata_device *ata_dev_pair(struct ata_device *adev);
805extern int ata_do_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev);
806extern u8 ata_irq_on(struct ata_port *ap);
807extern u8 ata_dummy_irq_on(struct ata_port *ap);
808extern u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq);
809extern u8 ata_dummy_irq_ack(struct ata_port *ap, unsigned int chk_drq);
810
811extern int ata_cable_40wire(struct ata_port *ap);
812extern int ata_cable_80wire(struct ata_port *ap);
813extern int ata_cable_sata(struct ata_port *ap);
814extern int ata_cable_unknown(struct ata_port *ap);
815
816/*
817 * Timing helpers
818 */
819
820extern unsigned int ata_pio_need_iordy(const struct ata_device *);
821extern int ata_timing_compute(struct ata_device *, unsigned short,
822 struct ata_timing *, int, int);
823extern void ata_timing_merge(const struct ata_timing *,
824 const struct ata_timing *, struct ata_timing *,
825 unsigned int);
826
827enum {
828 ATA_TIMING_SETUP = (1 << 0),
829 ATA_TIMING_ACT8B = (1 << 1),
830 ATA_TIMING_REC8B = (1 << 2),
831 ATA_TIMING_CYC8B = (1 << 3),
832 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
833 ATA_TIMING_CYC8B,
834 ATA_TIMING_ACTIVE = (1 << 4),
835 ATA_TIMING_RECOVER = (1 << 5),
836 ATA_TIMING_CYCLE = (1 << 6),
837 ATA_TIMING_UDMA = (1 << 7),
838 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
839 ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
840 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
841 ATA_TIMING_CYCLE | ATA_TIMING_UDMA,
842};
843
844
845#ifdef CONFIG_PCI
846struct pci_bits {
847 unsigned int reg; /* PCI config register to read */
848 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
849 unsigned long mask;
850 unsigned long val;
851};
852
853extern int ata_pci_init_native_host(struct ata_host *host);
854extern int ata_pci_init_bmdma(struct ata_host *host);
855extern int ata_pci_prepare_native_host(struct pci_dev *pdev,
856 const struct ata_port_info * const * ppi,
857 struct ata_host **r_host);
858extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
859extern unsigned long ata_pci_default_filter(struct ata_device *, unsigned long);
860#endif /* CONFIG_PCI */
861
862/*
863 * EH
864 */
865extern void ata_eng_timeout(struct ata_port *ap);
866
867extern void ata_port_schedule_eh(struct ata_port *ap);
868extern int ata_port_abort(struct ata_port *ap);
869extern int ata_port_freeze(struct ata_port *ap);
870
871extern void ata_eh_freeze_port(struct ata_port *ap);
872extern void ata_eh_thaw_port(struct ata_port *ap);
873
874extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
875extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
876
877extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
878 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
879 ata_postreset_fn_t postreset);
880
881/*
882 * printk helpers
883 */
884#define ata_port_printk(ap, lv, fmt, args...) \
885 printk(lv"ata%u: "fmt, (ap)->print_id , ##args)
886
887#define ata_dev_printk(dev, lv, fmt, args...) \
888 printk(lv"ata%u.%02u: "fmt, (dev)->ap->print_id, (dev)->devno , ##args)
889
890/*
891 * ata_eh_info helpers
892 */
893#define ata_ehi_push_desc(ehi, fmt, args...) do { \
894 (ehi)->desc_len += scnprintf((ehi)->desc + (ehi)->desc_len, \
895 ATA_EH_DESC_LEN - (ehi)->desc_len, \
896 fmt , ##args); \
897} while (0)
898
899#define ata_ehi_clear_desc(ehi) do { \
900 (ehi)->desc[0] = '\0'; \
901 (ehi)->desc_len = 0; \
902} while (0)
903
904static inline void __ata_ehi_hotplugged(struct ata_eh_info *ehi)
905{
906 ehi->flags |= ATA_EHI_HOTPLUGGED | ATA_EHI_RESUME_LINK;
907 ehi->action |= ATA_EH_SOFTRESET;
908 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
909}
910
911static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
912{
913 __ata_ehi_hotplugged(ehi);
914 ehi->err_mask |= AC_ERR_ATA_BUS;
915}
916
917/*
918 * qc helpers
919 */
920static inline int
921ata_sg_is_last(struct scatterlist *sg, struct ata_queued_cmd *qc)
922{
923 if (sg == &qc->pad_sgent)
924 return 1;
925 if (qc->pad_len)
926 return 0;
927 if (((sg - qc->__sg) + 1) == qc->n_elem)
928 return 1;
929 return 0;
930}
931
932static inline struct scatterlist *
933ata_qc_first_sg(struct ata_queued_cmd *qc)
934{
935 if (qc->n_elem)
936 return qc->__sg;
937 if (qc->pad_len)
938 return &qc->pad_sgent;
939 return NULL;
940}
941
942static inline struct scatterlist *
943ata_qc_next_sg(struct scatterlist *sg, struct ata_queued_cmd *qc)
944{
945 if (sg == &qc->pad_sgent)
946 return NULL;
947 if (++sg - qc->__sg < qc->n_elem)
948 return sg;
949 if (qc->pad_len)
950 return &qc->pad_sgent;
951 return NULL;
952}
953
954#define ata_for_each_sg(sg, qc) \
955 for (sg = ata_qc_first_sg(qc); sg; sg = ata_qc_next_sg(sg, qc))
956
957static inline unsigned int ata_tag_valid(unsigned int tag)
958{
959 return (tag < ATA_MAX_QUEUE) ? 1 : 0;
960}
961
962static inline unsigned int ata_tag_internal(unsigned int tag)
963{
964 return tag == ATA_MAX_QUEUE - 1;
965}
966
967/*
968 * device helpers
969 */
970static inline unsigned int ata_class_enabled(unsigned int class)
971{
972 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI;
973}
974
975static inline unsigned int ata_class_disabled(unsigned int class)
976{
977 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP;
978}
979
980static inline unsigned int ata_class_absent(unsigned int class)
981{
982 return !ata_class_enabled(class) && !ata_class_disabled(class);
983}
984
985static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
986{
987 return ata_class_enabled(dev->class);
988}
989
990static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
991{
992 return ata_class_disabled(dev->class);
993}
994
995static inline unsigned int ata_dev_absent(const struct ata_device *dev)
996{
997 return ata_class_absent(dev->class);
998}
999
1000/*
1001 * port helpers
1002 */
1003static inline int ata_port_max_devices(const struct ata_port *ap)
1004{
1005 if (ap->flags & ATA_FLAG_SLAVE_POSS)
1006 return 2;
1007 return 1;
1008}
1009
1010
1011static inline u8 ata_chk_status(struct ata_port *ap)
1012{
1013 return ap->ops->check_status(ap);
1014}
1015
1016/**
1017 * ata_ncq_enabled - Test whether NCQ is enabled
1018 * @dev: ATA device to test for
1019 *
1020 * LOCKING:
1021 * spin_lock_irqsave(host lock)
1022 *
1023 * RETURNS:
1024 * 1 if NCQ is enabled for @dev, 0 otherwise.
1025 */
1026static inline int ata_ncq_enabled(struct ata_device *dev)
1027{
1028 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF |
1029 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ;
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
1040static 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
1061static 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
1087static 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 if (ata_msg_warn(ap))
1093 printk(KERN_WARNING "ATA: abnormal status 0x%X on port 0x%p\n",
1094 status, ap->ioaddr.status_addr);
1095 }
1096
1097 return status;
1098}
1099
1100static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
1101{
1102 qc->tf.ctl |= ATA_NIEN;
1103}
1104
1105static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap,
1106 unsigned int tag)
1107{
1108 if (likely(ata_tag_valid(tag)))
1109 return &ap->qcmd[tag];
1110 return NULL;
1111}
1112
1113static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap,
1114 unsigned int tag)
1115{
1116 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
1117
1118 if (unlikely(!qc) || !ap->ops->error_handler)
1119 return qc;
1120
1121 if ((qc->flags & (ATA_QCFLAG_ACTIVE |
1122 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE)
1123 return qc;
1124
1125 return NULL;
1126}
1127
1128static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
1129{
1130 memset(tf, 0, sizeof(*tf));
1131
1132 tf->ctl = dev->ap->ctl;
1133 if (dev->devno == 0)
1134 tf->device = ATA_DEVICE_OBS;
1135 else
1136 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
1137}
1138
1139static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
1140{
1141 qc->dma_dir = DMA_NONE;
1142 qc->__sg = NULL;
1143 qc->flags = 0;
1144 qc->cursg = qc->cursg_ofs = 0;
1145 qc->nbytes = qc->curbytes = 0;
1146 qc->n_elem = 0;
1147 qc->err_mask = 0;
1148 qc->pad_len = 0;
1149 qc->sect_size = ATA_SECT_SIZE;
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
1158static inline int ata_try_flush_cache(const struct ata_device *dev)
1159{
1160 return ata_id_wcache_enabled(dev->id) ||
1161 ata_id_has_flush(dev->id) ||
1162 ata_id_has_flush_ext(dev->id);
1163}
1164
1165static inline unsigned int ac_err_mask(u8 status)
1166{
1167 if (status & (ATA_BUSY | ATA_DRQ))
1168 return AC_ERR_HSM;
1169 if (status & (ATA_ERR | ATA_DF))
1170 return AC_ERR_DEV;
1171 return 0;
1172}
1173
1174static inline unsigned int __ac_err_mask(u8 status)
1175{
1176 unsigned int mask = ac_err_mask(status);
1177 if (mask == 0)
1178 return AC_ERR_OTHER;
1179 return mask;
1180}
1181
1182static inline int ata_pad_alloc(struct ata_port *ap, struct device *dev)
1183{
1184 ap->pad_dma = 0;
1185 ap->pad = dmam_alloc_coherent(dev, ATA_DMA_PAD_BUF_SZ,
1186 &ap->pad_dma, GFP_KERNEL);
1187 return (ap->pad == NULL) ? -ENOMEM : 0;
1188}
1189
1190static inline void ata_pad_free(struct ata_port *ap, struct device *dev)
1191{
1192 dmam_free_coherent(dev, ATA_DMA_PAD_BUF_SZ, ap->pad, ap->pad_dma);
1193}
1194
1195static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
1196{
1197 return *(struct ata_port **)&host->hostdata[0];
1198}
1199
1200#endif /* __LINUX_LIBATA_H__ */
Linux kernel - Deliverables
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