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Merge branch 'for-linus' of master.kernel.org:/pub/scm/linux/kernel/git/roland/infiniband
[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 <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
78 enum {
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
98 static 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? */
111 static inline struct device *pci_dev_to_dev(struct pci_dev *pdev)
112 {
113 return &pdev->dev;
114 }
115
116 enum {
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_INIT_MASK = (1 << 16) - 1,
144
145 ATA_DFLAG_DETACH = (1 << 16),
146 ATA_DFLAG_DETACHED = (1 << 17),
147
148 ATA_DEV_UNKNOWN = 0, /* unknown device */
149 ATA_DEV_ATA = 1, /* ATA device */
150 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */
151 ATA_DEV_ATAPI = 3, /* ATAPI device */
152 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */
153 ATA_DEV_NONE = 5, /* no device */
154
155 /* struct ata_port flags */
156 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */
157 /* (doesn't imply presence) */
158 ATA_FLAG_SATA = (1 << 1),
159 ATA_FLAG_NO_LEGACY = (1 << 2), /* no legacy mode check */
160 ATA_FLAG_MMIO = (1 << 3), /* use MMIO, not PIO */
161 ATA_FLAG_SRST = (1 << 4), /* (obsolete) use ATA SRST, not E.D.D. */
162 ATA_FLAG_SATA_RESET = (1 << 5), /* (obsolete) use COMRESET */
163 ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */
164 ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */
165 ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */
166 ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD
167 * doesn't handle PIO interrupts */
168 ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */
169 ATA_FLAG_HRST_TO_RESUME = (1 << 11), /* hardreset to resume phy */
170 ATA_FLAG_SKIP_D2H_BSY = (1 << 12), /* can't wait for the first D2H
171 * Register FIS clearing BSY */
172 ATA_FLAG_DEBUGMSG = (1 << 13),
173 ATA_FLAG_SETXFER_POLLING= (1 << 14), /* use polling for SETXFER */
174 ATA_FLAG_IGN_SIMPLEX = (1 << 15), /* ignore SIMPLEX */
175 ATA_FLAG_NO_IORDY = (1 << 16), /* controller lacks iordy */
176
177 /* The following flag belongs to ap->pflags but is kept in
178 * ap->flags because it's referenced in many LLDs and will be
179 * removed in not-too-distant future.
180 */
181 ATA_FLAG_DISABLED = (1 << 23), /* port is disabled, ignore it */
182
183 /* bits 24:31 of ap->flags are reserved for LLD specific flags */
184
185 /* struct ata_port pflags */
186 ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */
187 ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */
188 ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */
189 ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */
190 ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */
191 ATA_PFLAG_UNLOADING = (1 << 5), /* module is unloading */
192 ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */
193 ATA_PFLAG_INITIALIZING = (1 << 7), /* being initialized, don't touch */
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 ATA_HOST_STARTED = (1 << 1), /* Host started */
214
215 /* various lengths of time */
216 ATA_TMOUT_BOOT = 30 * HZ, /* heuristic */
217 ATA_TMOUT_BOOT_QUICK = 7 * HZ, /* heuristic */
218 ATA_TMOUT_INTERNAL = 30 * HZ,
219 ATA_TMOUT_INTERNAL_QUICK = 5 * HZ,
220
221 /* ATA bus states */
222 BUS_UNKNOWN = 0,
223 BUS_DMA = 1,
224 BUS_IDLE = 2,
225 BUS_NOINTR = 3,
226 BUS_NODATA = 4,
227 BUS_TIMER = 5,
228 BUS_PIO = 6,
229 BUS_EDD = 7,
230 BUS_IDENTIFY = 8,
231 BUS_PACKET = 9,
232
233 /* SATA port states */
234 PORT_UNKNOWN = 0,
235 PORT_ENABLED = 1,
236 PORT_DISABLED = 2,
237
238 /* encoding various smaller bitmaps into a single
239 * unsigned int bitmap
240 */
241 ATA_BITS_PIO = 7,
242 ATA_BITS_MWDMA = 5,
243 ATA_BITS_UDMA = 8,
244
245 ATA_SHIFT_PIO = 0,
246 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_BITS_PIO,
247 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_BITS_MWDMA,
248
249 ATA_MASK_PIO = ((1 << ATA_BITS_PIO) - 1) << ATA_SHIFT_PIO,
250 ATA_MASK_MWDMA = ((1 << ATA_BITS_MWDMA) - 1) << ATA_SHIFT_MWDMA,
251 ATA_MASK_UDMA = ((1 << ATA_BITS_UDMA) - 1) << ATA_SHIFT_UDMA,
252
253 /* size of buffer to pad xfers ending on unaligned boundaries */
254 ATA_DMA_PAD_SZ = 4,
255 ATA_DMA_PAD_BUF_SZ = ATA_DMA_PAD_SZ * ATA_MAX_QUEUE,
256
257 /* ering size */
258 ATA_ERING_SIZE = 32,
259
260 /* desc_len for ata_eh_info and context */
261 ATA_EH_DESC_LEN = 80,
262
263 /* reset / recovery action types */
264 ATA_EH_REVALIDATE = (1 << 0),
265 ATA_EH_SOFTRESET = (1 << 1),
266 ATA_EH_HARDRESET = (1 << 2),
267
268 ATA_EH_RESET_MASK = ATA_EH_SOFTRESET | ATA_EH_HARDRESET,
269 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE,
270
271 /* ata_eh_info->flags */
272 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */
273 ATA_EHI_RESUME_LINK = (1 << 1), /* resume link (reset modifier) */
274 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */
275 ATA_EHI_QUIET = (1 << 3), /* be quiet */
276
277 ATA_EHI_DID_SOFTRESET = (1 << 16), /* already soft-reset this port */
278 ATA_EHI_DID_HARDRESET = (1 << 17), /* already soft-reset this port */
279 ATA_EHI_PRINTINFO = (1 << 18), /* print configuration info */
280 ATA_EHI_SETMODE = (1 << 19), /* configure transfer mode */
281 ATA_EHI_POST_SETMODE = (1 << 20), /* revaildating after setmode */
282
283 ATA_EHI_DID_RESET = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET,
284 ATA_EHI_RESET_MODIFIER_MASK = ATA_EHI_RESUME_LINK,
285
286 /* max repeat if error condition is still set after ->error_handler */
287 ATA_EH_MAX_REPEAT = 5,
288
289 /* how hard are we gonna try to probe/recover devices */
290 ATA_PROBE_MAX_TRIES = 3,
291 ATA_EH_DEV_TRIES = 3,
292
293 /* Horkage types. May be set by libata or controller on drives
294 (some horkage may be drive/controller pair dependant */
295
296 ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */
297 ATA_HORKAGE_NODMA = (1 << 1), /* DMA problems */
298 ATA_HORKAGE_NONCQ = (1 << 2), /* Don't use NCQ */
299 ATA_HORKAGE_MAX_SEC_128 = (1 << 3), /* Limit max sects to 128 */
300 ATA_HORKAGE_DMA_RW_ONLY = (1 << 4), /* ATAPI DMA for RW only */
301 };
302
303 enum hsm_task_states {
304 HSM_ST_IDLE, /* no command on going */
305 HSM_ST_FIRST, /* (waiting the device to)
306 write CDB or first data block */
307 HSM_ST, /* (waiting the device to) transfer data */
308 HSM_ST_LAST, /* (waiting the device to) complete command */
309 HSM_ST_ERR, /* error */
310 };
311
312 enum ata_completion_errors {
313 AC_ERR_DEV = (1 << 0), /* device reported error */
314 AC_ERR_HSM = (1 << 1), /* host state machine violation */
315 AC_ERR_TIMEOUT = (1 << 2), /* timeout */
316 AC_ERR_MEDIA = (1 << 3), /* media error */
317 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */
318 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */
319 AC_ERR_SYSTEM = (1 << 6), /* system error */
320 AC_ERR_INVALID = (1 << 7), /* invalid argument */
321 AC_ERR_OTHER = (1 << 8), /* unknown */
322 AC_ERR_NODEV_HINT = (1 << 9), /* polling device detection hint */
323 };
324
325 /* forward declarations */
326 struct scsi_device;
327 struct ata_port_operations;
328 struct ata_port;
329 struct ata_queued_cmd;
330
331 /* typedefs */
332 typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
333 typedef int (*ata_prereset_fn_t)(struct ata_port *ap, unsigned long deadline);
334 typedef int (*ata_reset_fn_t)(struct ata_port *ap, unsigned int *classes,
335 unsigned long deadline);
336 typedef void (*ata_postreset_fn_t)(struct ata_port *ap, unsigned int *classes);
337
338 struct ata_ioports {
339 void __iomem *cmd_addr;
340 void __iomem *data_addr;
341 void __iomem *error_addr;
342 void __iomem *feature_addr;
343 void __iomem *nsect_addr;
344 void __iomem *lbal_addr;
345 void __iomem *lbam_addr;
346 void __iomem *lbah_addr;
347 void __iomem *device_addr;
348 void __iomem *status_addr;
349 void __iomem *command_addr;
350 void __iomem *altstatus_addr;
351 void __iomem *ctl_addr;
352 void __iomem *bmdma_addr;
353 void __iomem *scr_addr;
354 };
355
356 struct ata_host {
357 spinlock_t lock;
358 struct device *dev;
359 unsigned long irq;
360 unsigned long irq2;
361 void __iomem * const *iomap;
362 unsigned int n_ports;
363 void *private_data;
364 const struct ata_port_operations *ops;
365 unsigned long flags;
366 struct ata_port *simplex_claimed; /* channel owning the DMA */
367 struct ata_port *ports[0];
368 };
369
370 struct ata_queued_cmd {
371 struct ata_port *ap;
372 struct ata_device *dev;
373
374 struct scsi_cmnd *scsicmd;
375 void (*scsidone)(struct scsi_cmnd *);
376
377 struct ata_taskfile tf;
378 u8 cdb[ATAPI_CDB_LEN];
379
380 unsigned long flags; /* ATA_QCFLAG_xxx */
381 unsigned int tag;
382 unsigned int n_elem;
383 unsigned int orig_n_elem;
384
385 int dma_dir;
386
387 unsigned int pad_len;
388 unsigned int sect_size;
389
390 unsigned int nbytes;
391 unsigned int curbytes;
392
393 unsigned int cursg;
394 unsigned int cursg_ofs;
395
396 struct scatterlist sgent;
397 struct scatterlist pad_sgent;
398 void *buf_virt;
399
400 /* DO NOT iterate over __sg manually, use ata_for_each_sg() */
401 struct scatterlist *__sg;
402
403 unsigned int err_mask;
404 struct ata_taskfile result_tf;
405 ata_qc_cb_t complete_fn;
406
407 void *private_data;
408 };
409
410 struct ata_port_stats {
411 unsigned long unhandled_irq;
412 unsigned long idle_irq;
413 unsigned long rw_reqbuf;
414 };
415
416 struct ata_ering_entry {
417 int is_io;
418 unsigned int err_mask;
419 u64 timestamp;
420 };
421
422 struct ata_ering {
423 int cursor;
424 struct ata_ering_entry ring[ATA_ERING_SIZE];
425 };
426
427 struct ata_device {
428 struct ata_port *ap;
429 unsigned int devno; /* 0 or 1 */
430 unsigned long flags; /* ATA_DFLAG_xxx */
431 struct scsi_device *sdev; /* attached SCSI device */
432 /* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */
433 u64 n_sectors; /* size of device, if ATA */
434 u64 n_sectors_boot; /* size of ATA device at startup */
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
472 struct 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
486 struct 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
493 struct 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
556 struct 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 void (*post_set_mode) (struct ata_port *ap);
577
578 int (*cable_detect) (struct ata_port *ap);
579
580 int (*check_atapi_dma) (struct ata_queued_cmd *qc);
581
582 void (*bmdma_setup) (struct ata_queued_cmd *qc);
583 void (*bmdma_start) (struct ata_queued_cmd *qc);
584
585 void (*data_xfer) (struct ata_device *, unsigned char *, unsigned int, int);
586
587 void (*qc_prep) (struct ata_queued_cmd *qc);
588 unsigned int (*qc_issue) (struct ata_queued_cmd *qc);
589
590 /* Error handlers. ->error_handler overrides ->eng_timeout and
591 * indicates that new-style EH is in place.
592 */
593 void (*eng_timeout) (struct ata_port *ap); /* obsolete */
594
595 void (*freeze) (struct ata_port *ap);
596 void (*thaw) (struct ata_port *ap);
597 void (*error_handler) (struct ata_port *ap);
598 void (*post_internal_cmd) (struct ata_queued_cmd *qc);
599
600 irq_handler_t irq_handler;
601 void (*irq_clear) (struct ata_port *);
602 u8 (*irq_on) (struct ata_port *);
603 u8 (*irq_ack) (struct ata_port *ap, unsigned int chk_drq);
604
605 u32 (*scr_read) (struct ata_port *ap, unsigned int sc_reg);
606 void (*scr_write) (struct ata_port *ap, unsigned int sc_reg,
607 u32 val);
608
609 int (*port_suspend) (struct ata_port *ap, pm_message_t mesg);
610 int (*port_resume) (struct ata_port *ap);
611
612 int (*port_start) (struct ata_port *ap);
613 void (*port_stop) (struct ata_port *ap);
614
615 void (*host_stop) (struct ata_host *host);
616
617 void (*bmdma_stop) (struct ata_queued_cmd *qc);
618 u8 (*bmdma_status) (struct ata_port *ap);
619 };
620
621 struct ata_port_info {
622 struct scsi_host_template *sht;
623 unsigned long flags;
624 unsigned long pio_mask;
625 unsigned long mwdma_mask;
626 unsigned long udma_mask;
627 const struct ata_port_operations *port_ops;
628 irq_handler_t irq_handler;
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 extern const struct ata_port_operations ata_dummy_port_ops;
651 extern const struct ata_port_info ata_dummy_port_info;
652
653 static inline const unsigned long *
654 sata_ehc_deb_timing(struct ata_eh_context *ehc)
655 {
656 if (ehc->i.flags & ATA_EHI_HOTPLUGGED)
657 return sata_deb_timing_hotplug;
658 else
659 return sata_deb_timing_normal;
660 }
661
662 static inline int ata_port_is_dummy(struct ata_port *ap)
663 {
664 return ap->ops == &ata_dummy_port_ops;
665 }
666
667 extern void sata_print_link_status(struct ata_port *ap);
668 extern void ata_port_probe(struct ata_port *);
669 extern void __sata_phy_reset(struct ata_port *ap);
670 extern void sata_phy_reset(struct ata_port *ap);
671 extern void ata_bus_reset(struct ata_port *ap);
672 extern int sata_set_spd(struct ata_port *ap);
673 extern int sata_phy_debounce(struct ata_port *ap, const unsigned long *param,
674 unsigned long deadline);
675 extern int sata_phy_resume(struct ata_port *ap, const unsigned long *param,
676 unsigned long deadline);
677 extern int ata_std_prereset(struct ata_port *ap, unsigned long deadline);
678 extern int ata_std_softreset(struct ata_port *ap, unsigned int *classes,
679 unsigned long deadline);
680 extern int sata_port_hardreset(struct ata_port *ap, const unsigned long *timing,
681 unsigned long deadline);
682 extern int sata_std_hardreset(struct ata_port *ap, unsigned int *class,
683 unsigned long deadline);
684 extern void ata_std_postreset(struct ata_port *ap, unsigned int *classes);
685 extern void ata_port_disable(struct ata_port *);
686 extern void ata_std_ports(struct ata_ioports *ioaddr);
687 #ifdef CONFIG_PCI
688 extern int ata_pci_init_one (struct pci_dev *pdev,
689 const struct ata_port_info * const * ppi);
690 extern void ata_pci_remove_one (struct pci_dev *pdev);
691 #ifdef CONFIG_PM
692 extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg);
693 extern int __must_check ata_pci_device_do_resume(struct pci_dev *pdev);
694 extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
695 extern int ata_pci_device_resume(struct pci_dev *pdev);
696 #endif
697 extern int ata_pci_clear_simplex(struct pci_dev *pdev);
698 #endif /* CONFIG_PCI */
699 extern struct ata_host *ata_host_alloc(struct device *dev, int max_ports);
700 extern struct ata_host *ata_host_alloc_pinfo(struct device *dev,
701 const struct ata_port_info * const * ppi, int n_ports);
702 extern int ata_host_start(struct ata_host *host);
703 extern int ata_host_register(struct ata_host *host,
704 struct scsi_host_template *sht);
705 extern int ata_host_activate(struct ata_host *host, int irq,
706 irq_handler_t irq_handler, unsigned long irq_flags,
707 struct scsi_host_template *sht);
708 extern void ata_host_detach(struct ata_host *host);
709 extern void ata_host_init(struct ata_host *, struct device *,
710 unsigned long, const struct ata_port_operations *);
711 extern int ata_scsi_detect(struct scsi_host_template *sht);
712 extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
713 extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *));
714 extern void ata_sas_port_destroy(struct ata_port *);
715 extern struct ata_port *ata_sas_port_alloc(struct ata_host *,
716 struct ata_port_info *, struct Scsi_Host *);
717 extern int ata_sas_port_init(struct ata_port *);
718 extern int ata_sas_port_start(struct ata_port *ap);
719 extern void ata_sas_port_stop(struct ata_port *ap);
720 extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *);
721 extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
722 struct ata_port *ap);
723 extern unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc);
724 extern int sata_scr_valid(struct ata_port *ap);
725 extern int sata_scr_read(struct ata_port *ap, int reg, u32 *val);
726 extern int sata_scr_write(struct ata_port *ap, int reg, u32 val);
727 extern int sata_scr_write_flush(struct ata_port *ap, int reg, u32 val);
728 extern int ata_port_online(struct ata_port *ap);
729 extern int ata_port_offline(struct ata_port *ap);
730 #ifdef CONFIG_PM
731 extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg);
732 extern void ata_host_resume(struct ata_host *host);
733 #endif
734 extern int ata_ratelimit(void);
735 extern int ata_busy_sleep(struct ata_port *ap,
736 unsigned long timeout_pat, unsigned long timeout);
737 extern int ata_wait_ready(struct ata_port *ap, unsigned long deadline);
738 extern void ata_port_queue_task(struct ata_port *ap, work_func_t fn,
739 void *data, unsigned long delay);
740 extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
741 unsigned long interval_msec,
742 unsigned long timeout_msec);
743 extern unsigned int ata_dev_try_classify(struct ata_port *, unsigned int, u8 *);
744
745 /*
746 * Default driver ops implementations
747 */
748 extern void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
749 extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
750 extern void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp);
751 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
752 extern void ata_noop_dev_select (struct ata_port *ap, unsigned int device);
753 extern void ata_std_dev_select (struct ata_port *ap, unsigned int device);
754 extern u8 ata_check_status(struct ata_port *ap);
755 extern u8 ata_altstatus(struct ata_port *ap);
756 extern void ata_exec_command(struct ata_port *ap, const struct ata_taskfile *tf);
757 extern int ata_port_start (struct ata_port *ap);
758 extern irqreturn_t ata_interrupt (int irq, void *dev_instance);
759 extern void ata_data_xfer(struct ata_device *adev, unsigned char *buf,
760 unsigned int buflen, int write_data);
761 extern void ata_data_xfer_noirq(struct ata_device *adev, unsigned char *buf,
762 unsigned int buflen, int write_data);
763 extern void ata_qc_prep(struct ata_queued_cmd *qc);
764 extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
765 extern unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc);
766 extern void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf,
767 unsigned int buflen);
768 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
769 unsigned int n_elem);
770 extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
771 extern void ata_dev_disable(struct ata_device *adev);
772 extern void ata_id_string(const u16 *id, unsigned char *s,
773 unsigned int ofs, unsigned int len);
774 extern void ata_id_c_string(const u16 *id, unsigned char *s,
775 unsigned int ofs, unsigned int len);
776 extern void ata_id_to_dma_mode(struct ata_device *dev, u8 unknown);
777 extern unsigned long ata_device_blacklisted(const struct ata_device *dev);
778 extern void ata_bmdma_setup (struct ata_queued_cmd *qc);
779 extern void ata_bmdma_start (struct ata_queued_cmd *qc);
780 extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
781 extern u8 ata_bmdma_status(struct ata_port *ap);
782 extern void ata_bmdma_irq_clear(struct ata_port *ap);
783 extern void ata_bmdma_freeze(struct ata_port *ap);
784 extern void ata_bmdma_thaw(struct ata_port *ap);
785 extern void ata_bmdma_drive_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
786 ata_reset_fn_t softreset,
787 ata_reset_fn_t hardreset,
788 ata_postreset_fn_t postreset);
789 extern void ata_bmdma_error_handler(struct ata_port *ap);
790 extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc);
791 extern int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
792 u8 status, int in_wq);
793 extern void ata_qc_complete(struct ata_queued_cmd *qc);
794 extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active,
795 void (*finish_qc)(struct ata_queued_cmd *));
796 extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
797 void (*done)(struct scsi_cmnd *));
798 extern int ata_std_bios_param(struct scsi_device *sdev,
799 struct block_device *bdev,
800 sector_t capacity, int geom[]);
801 extern int ata_scsi_slave_config(struct scsi_device *sdev);
802 extern void ata_scsi_slave_destroy(struct scsi_device *sdev);
803 extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
804 int queue_depth);
805 extern struct ata_device *ata_dev_pair(struct ata_device *adev);
806 extern int ata_do_set_mode(struct ata_port *ap, struct ata_device **r_failed_dev);
807 extern u8 ata_irq_on(struct ata_port *ap);
808 extern u8 ata_dummy_irq_on(struct ata_port *ap);
809 extern u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq);
810 extern u8 ata_dummy_irq_ack(struct ata_port *ap, unsigned int chk_drq);
811
812 extern int ata_cable_40wire(struct ata_port *ap);
813 extern int ata_cable_80wire(struct ata_port *ap);
814 extern int ata_cable_sata(struct ata_port *ap);
815 extern int ata_cable_unknown(struct ata_port *ap);
816
817 /*
818 * Timing helpers
819 */
820
821 extern unsigned int ata_pio_need_iordy(const struct ata_device *);
822 extern int ata_timing_compute(struct ata_device *, unsigned short,
823 struct ata_timing *, int, int);
824 extern void ata_timing_merge(const struct ata_timing *,
825 const struct ata_timing *, struct ata_timing *,
826 unsigned int);
827
828 enum {
829 ATA_TIMING_SETUP = (1 << 0),
830 ATA_TIMING_ACT8B = (1 << 1),
831 ATA_TIMING_REC8B = (1 << 2),
832 ATA_TIMING_CYC8B = (1 << 3),
833 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
834 ATA_TIMING_CYC8B,
835 ATA_TIMING_ACTIVE = (1 << 4),
836 ATA_TIMING_RECOVER = (1 << 5),
837 ATA_TIMING_CYCLE = (1 << 6),
838 ATA_TIMING_UDMA = (1 << 7),
839 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
840 ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
841 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
842 ATA_TIMING_CYCLE | ATA_TIMING_UDMA,
843 };
844
845
846 #ifdef CONFIG_PCI
847 struct pci_bits {
848 unsigned int reg; /* PCI config register to read */
849 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
850 unsigned long mask;
851 unsigned long val;
852 };
853
854 extern int ata_pci_init_native_host(struct ata_host *host);
855 extern int ata_pci_init_bmdma(struct ata_host *host);
856 extern int ata_pci_prepare_native_host(struct pci_dev *pdev,
857 const struct ata_port_info * const * ppi,
858 struct ata_host **r_host);
859 extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
860 extern unsigned long ata_pci_default_filter(struct ata_device *, unsigned long);
861 #endif /* CONFIG_PCI */
862
863 /*
864 * EH
865 */
866 extern void ata_eng_timeout(struct ata_port *ap);
867
868 extern void ata_port_schedule_eh(struct ata_port *ap);
869 extern int ata_port_abort(struct ata_port *ap);
870 extern int ata_port_freeze(struct ata_port *ap);
871
872 extern void ata_eh_freeze_port(struct ata_port *ap);
873 extern void ata_eh_thaw_port(struct ata_port *ap);
874
875 extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
876 extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
877
878 extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
879 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
880 ata_postreset_fn_t postreset);
881
882 /*
883 * printk helpers
884 */
885 #define ata_port_printk(ap, lv, fmt, args...) \
886 printk(lv"ata%u: "fmt, (ap)->print_id , ##args)
887
888 #define ata_dev_printk(dev, lv, fmt, args...) \
889 printk(lv"ata%u.%02u: "fmt, (dev)->ap->print_id, (dev)->devno , ##args)
890
891 /*
892 * ata_eh_info helpers
893 */
894 #define ata_ehi_push_desc(ehi, fmt, args...) do { \
895 (ehi)->desc_len += scnprintf((ehi)->desc + (ehi)->desc_len, \
896 ATA_EH_DESC_LEN - (ehi)->desc_len, \
897 fmt , ##args); \
898 } while (0)
899
900 #define ata_ehi_clear_desc(ehi) do { \
901 (ehi)->desc[0] = '\0'; \
902 (ehi)->desc_len = 0; \
903 } while (0)
904
905 static inline void __ata_ehi_hotplugged(struct ata_eh_info *ehi)
906 {
907 ehi->flags |= ATA_EHI_HOTPLUGGED | ATA_EHI_RESUME_LINK;
908 ehi->action |= ATA_EH_SOFTRESET;
909 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
910 }
911
912 static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
913 {
914 __ata_ehi_hotplugged(ehi);
915 ehi->err_mask |= AC_ERR_ATA_BUS;
916 }
917
918 /*
919 * qc helpers
920 */
921 static inline int
922 ata_sg_is_last(struct scatterlist *sg, struct ata_queued_cmd *qc)
923 {
924 if (sg == &qc->pad_sgent)
925 return 1;
926 if (qc->pad_len)
927 return 0;
928 if (((sg - qc->__sg) + 1) == qc->n_elem)
929 return 1;
930 return 0;
931 }
932
933 static inline struct scatterlist *
934 ata_qc_first_sg(struct ata_queued_cmd *qc)
935 {
936 if (qc->n_elem)
937 return qc->__sg;
938 if (qc->pad_len)
939 return &qc->pad_sgent;
940 return NULL;
941 }
942
943 static inline struct scatterlist *
944 ata_qc_next_sg(struct scatterlist *sg, struct ata_queued_cmd *qc)
945 {
946 if (sg == &qc->pad_sgent)
947 return NULL;
948 if (++sg - qc->__sg < qc->n_elem)
949 return sg;
950 if (qc->pad_len)
951 return &qc->pad_sgent;
952 return NULL;
953 }
954
955 #define ata_for_each_sg(sg, qc) \
956 for (sg = ata_qc_first_sg(qc); sg; sg = ata_qc_next_sg(sg, qc))
957
958 static inline unsigned int ata_tag_valid(unsigned int tag)
959 {
960 return (tag < ATA_MAX_QUEUE) ? 1 : 0;
961 }
962
963 static inline unsigned int ata_tag_internal(unsigned int tag)
964 {
965 return tag == ATA_MAX_QUEUE - 1;
966 }
967
968 /*
969 * device helpers
970 */
971 static inline unsigned int ata_class_enabled(unsigned int class)
972 {
973 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI;
974 }
975
976 static inline unsigned int ata_class_disabled(unsigned int class)
977 {
978 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP;
979 }
980
981 static inline unsigned int ata_class_absent(unsigned int class)
982 {
983 return !ata_class_enabled(class) && !ata_class_disabled(class);
984 }
985
986 static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
987 {
988 return ata_class_enabled(dev->class);
989 }
990
991 static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
992 {
993 return ata_class_disabled(dev->class);
994 }
995
996 static inline unsigned int ata_dev_absent(const struct ata_device *dev)
997 {
998 return ata_class_absent(dev->class);
999 }
1000
1001 /*
1002 * port helpers
1003 */
1004 static inline int ata_port_max_devices(const struct ata_port *ap)
1005 {
1006 if (ap->flags & ATA_FLAG_SLAVE_POSS)
1007 return 2;
1008 return 1;
1009 }
1010
1011
1012 static inline u8 ata_chk_status(struct ata_port *ap)
1013 {
1014 return ap->ops->check_status(ap);
1015 }
1016
1017 /**
1018 * ata_ncq_enabled - Test whether NCQ is enabled
1019 * @dev: ATA device to test for
1020 *
1021 * LOCKING:
1022 * spin_lock_irqsave(host lock)
1023 *
1024 * RETURNS:
1025 * 1 if NCQ is enabled for @dev, 0 otherwise.
1026 */
1027 static inline int ata_ncq_enabled(struct ata_device *dev)
1028 {
1029 return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF |
1030 ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ;
1031 }
1032
1033 /**
1034 * ata_pause - Flush writes and pause 400 nanoseconds.
1035 * @ap: Port to wait for.
1036 *
1037 * LOCKING:
1038 * Inherited from caller.
1039 */
1040
1041 static inline void ata_pause(struct ata_port *ap)
1042 {
1043 ata_altstatus(ap);
1044 ndelay(400);
1045 }
1046
1047
1048 /**
1049 * ata_busy_wait - Wait for a port status register
1050 * @ap: Port to wait for.
1051 * @bits: bits that must be clear
1052 * @max: number of 10uS waits to perform
1053 *
1054 * Waits up to max*10 microseconds for the selected bits in the port's
1055 * status register to be cleared.
1056 * Returns final value of status register.
1057 *
1058 * LOCKING:
1059 * Inherited from caller.
1060 */
1061
1062 static inline u8 ata_busy_wait(struct ata_port *ap, unsigned int bits,
1063 unsigned int max)
1064 {
1065 u8 status;
1066
1067 do {
1068 udelay(10);
1069 status = ata_chk_status(ap);
1070 max--;
1071 } while (status != 0xff && (status & bits) && (max > 0));
1072
1073 return status;
1074 }
1075
1076
1077 /**
1078 * ata_wait_idle - Wait for a port to be idle.
1079 * @ap: Port to wait for.
1080 *
1081 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
1082 * Returns final value of status register.
1083 *
1084 * LOCKING:
1085 * Inherited from caller.
1086 */
1087
1088 static inline u8 ata_wait_idle(struct ata_port *ap)
1089 {
1090 u8 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
1091
1092 if (status != 0xff && (status & (ATA_BUSY | ATA_DRQ))) {
1093 if (ata_msg_warn(ap))
1094 printk(KERN_WARNING "ATA: abnormal status 0x%X on port 0x%p\n",
1095 status, ap->ioaddr.status_addr);
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 qc->sect_size = ATA_SECT_SIZE;
1151
1152 ata_tf_init(qc->dev, &qc->tf);
1153
1154 /* init result_tf such that it indicates normal completion */
1155 qc->result_tf.command = ATA_DRDY;
1156 qc->result_tf.feature = 0;
1157 }
1158
1159 static inline int ata_try_flush_cache(const struct ata_device *dev)
1160 {
1161 return ata_id_wcache_enabled(dev->id) ||
1162 ata_id_has_flush(dev->id) ||
1163 ata_id_has_flush_ext(dev->id);
1164 }
1165
1166 static inline unsigned int ac_err_mask(u8 status)
1167 {
1168 if (status & (ATA_BUSY | ATA_DRQ))
1169 return AC_ERR_HSM;
1170 if (status & (ATA_ERR | ATA_DF))
1171 return AC_ERR_DEV;
1172 return 0;
1173 }
1174
1175 static inline unsigned int __ac_err_mask(u8 status)
1176 {
1177 unsigned int mask = ac_err_mask(status);
1178 if (mask == 0)
1179 return AC_ERR_OTHER;
1180 return mask;
1181 }
1182
1183 static inline int ata_pad_alloc(struct ata_port *ap, struct device *dev)
1184 {
1185 ap->pad_dma = 0;
1186 ap->pad = dmam_alloc_coherent(dev, ATA_DMA_PAD_BUF_SZ,
1187 &ap->pad_dma, GFP_KERNEL);
1188 return (ap->pad == NULL) ? -ENOMEM : 0;
1189 }
1190
1191 static inline void ata_pad_free(struct ata_port *ap, struct device *dev)
1192 {
1193 dmam_free_coherent(dev, ATA_DMA_PAD_BUF_SZ, ap->pad, ap->pad_dma);
1194 }
1195
1196 static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
1197 {
1198 return *(struct ata_port **)&host->hostdata[0];
1199 }
1200
1201 #endif /* __LINUX_LIBATA_H__ */
Linux kernel - Deliverables
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