projects / deliverable / linux.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Merge omap tree
[deliverable/linux.git] / include / linux / libata.h
1 /*
2 * Copyright 2003-2005 Red Hat, Inc. All rights reserved.
3 * Copyright 2003-2005 Jeff Garzik
4 *
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2, or (at your option)
9 * any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; see the file COPYING. If not, write to
18 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
19 *
20 *
21 * libata documentation is available via 'make {ps|pdf}docs',
22 * as Documentation/DocBook/libata.*
23 *
24 */
25
26 #ifndef __LINUX_LIBATA_H__
27 #define __LINUX_LIBATA_H__
28
29 #include <linux/delay.h>
30 #include <linux/interrupt.h>
31 #include <linux/pci.h>
32 #include <linux/dma-mapping.h>
33 #include <asm/scatterlist.h>
34 #include <asm/io.h>
35 #include <linux/ata.h>
36 #include <linux/workqueue.h>
37 #include <scsi/scsi_host.h>
38
39 /*
40 * compile-time options: to be removed as soon as all the drivers are
41 * converted to the new debugging mechanism
42 */
43 #undef ATA_DEBUG /* debugging output */
44 #undef ATA_VERBOSE_DEBUG /* yet more debugging output */
45 #undef ATA_IRQ_TRAP /* define to ack screaming irqs */
46 #undef ATA_NDEBUG /* define to disable quick runtime checks */
47 #undef ATA_ENABLE_PATA /* define to enable PATA support in some
48 * low-level drivers */
49
50
51 /* note: prints function name for you */
52 #ifdef ATA_DEBUG
53 #define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
54 #ifdef ATA_VERBOSE_DEBUG
55 #define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
56 #else
57 #define VPRINTK(fmt, args...)
58 #endif /* ATA_VERBOSE_DEBUG */
59 #else
60 #define DPRINTK(fmt, args...)
61 #define VPRINTK(fmt, args...)
62 #endif /* ATA_DEBUG */
63
64 #define BPRINTK(fmt, args...) if (ap->flags & ATA_FLAG_DEBUGMSG) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
65
66 /* NEW: debug levels */
67 #define HAVE_LIBATA_MSG 1
68
69 enum {
70 ATA_MSG_DRV = 0x0001,
71 ATA_MSG_INFO = 0x0002,
72 ATA_MSG_PROBE = 0x0004,
73 ATA_MSG_WARN = 0x0008,
74 ATA_MSG_MALLOC = 0x0010,
75 ATA_MSG_CTL = 0x0020,
76 ATA_MSG_INTR = 0x0040,
77 ATA_MSG_ERR = 0x0080,
78 };
79
80 #define ata_msg_drv(p) ((p)->msg_enable & ATA_MSG_DRV)
81 #define ata_msg_info(p) ((p)->msg_enable & ATA_MSG_INFO)
82 #define ata_msg_probe(p) ((p)->msg_enable & ATA_MSG_PROBE)
83 #define ata_msg_warn(p) ((p)->msg_enable & ATA_MSG_WARN)
84 #define ata_msg_malloc(p) ((p)->msg_enable & ATA_MSG_MALLOC)
85 #define ata_msg_ctl(p) ((p)->msg_enable & ATA_MSG_CTL)
86 #define ata_msg_intr(p) ((p)->msg_enable & ATA_MSG_INTR)
87 #define ata_msg_err(p) ((p)->msg_enable & ATA_MSG_ERR)
88
89 static inline u32 ata_msg_init(int dval, int default_msg_enable_bits)
90 {
91 if (dval < 0 || dval >= (sizeof(u32) * 8))
92 return default_msg_enable_bits; /* should be 0x1 - only driver info msgs */
93 if (!dval)
94 return 0;
95 return (1 << dval) - 1;
96 }
97
98 /* defines only for the constants which don't work well as enums */
99 #define ATA_TAG_POISON 0xfafbfcfdU
100
101 /* move to PCI layer? */
102 static inline struct device *pci_dev_to_dev(struct pci_dev *pdev)
103 {
104 return &pdev->dev;
105 }
106
107 enum {
108 /* various global constants */
109 LIBATA_MAX_PRD = ATA_MAX_PRD / 2,
110 ATA_MAX_PORTS = 8,
111 ATA_DEF_QUEUE = 1,
112 /* tag ATA_MAX_QUEUE - 1 is reserved for internal commands */
113 ATA_MAX_QUEUE = 32,
114 ATA_TAG_INTERNAL = ATA_MAX_QUEUE - 1,
115 ATA_MAX_SECTORS = 200, /* FIXME */
116 ATA_MAX_SECTORS_LBA48 = 65535,
117 ATA_MAX_BUS = 2,
118 ATA_DEF_BUSY_WAIT = 10000,
119 ATA_SHORT_PAUSE = (HZ >> 6) + 1,
120
121 ATA_SHT_EMULATED = 1,
122 ATA_SHT_CMD_PER_LUN = 1,
123 ATA_SHT_THIS_ID = -1,
124 ATA_SHT_USE_CLUSTERING = 1,
125
126 /* struct ata_device stuff */
127 ATA_DFLAG_LBA = (1 << 0), /* device supports LBA */
128 ATA_DFLAG_LBA48 = (1 << 1), /* device supports LBA48 */
129 ATA_DFLAG_CDB_INTR = (1 << 2), /* device asserts INTRQ when ready for CDB */
130 ATA_DFLAG_NCQ = (1 << 3), /* device supports NCQ */
131 ATA_DFLAG_CFG_MASK = (1 << 8) - 1,
132
133 ATA_DFLAG_PIO = (1 << 8), /* device currently in PIO mode */
134 ATA_DFLAG_INIT_MASK = (1 << 16) - 1,
135
136 ATA_DFLAG_DETACH = (1 << 16),
137 ATA_DFLAG_DETACHED = (1 << 17),
138
139 ATA_DEV_UNKNOWN = 0, /* unknown device */
140 ATA_DEV_ATA = 1, /* ATA device */
141 ATA_DEV_ATA_UNSUP = 2, /* ATA device (unsupported) */
142 ATA_DEV_ATAPI = 3, /* ATAPI device */
143 ATA_DEV_ATAPI_UNSUP = 4, /* ATAPI device (unsupported) */
144 ATA_DEV_NONE = 5, /* no device */
145
146 /* struct ata_port flags */
147 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */
148 /* (doesn't imply presence) */
149 ATA_FLAG_SATA = (1 << 1),
150 ATA_FLAG_NO_LEGACY = (1 << 2), /* no legacy mode check */
151 ATA_FLAG_MMIO = (1 << 3), /* use MMIO, not PIO */
152 ATA_FLAG_SRST = (1 << 4), /* (obsolete) use ATA SRST, not E.D.D. */
153 ATA_FLAG_SATA_RESET = (1 << 5), /* (obsolete) use COMRESET */
154 ATA_FLAG_NO_ATAPI = (1 << 6), /* No ATAPI support */
155 ATA_FLAG_PIO_DMA = (1 << 7), /* PIO cmds via DMA */
156 ATA_FLAG_PIO_LBA48 = (1 << 8), /* Host DMA engine is LBA28 only */
157 ATA_FLAG_PIO_POLLING = (1 << 9), /* use polling PIO if LLD
158 * doesn't handle PIO interrupts */
159 ATA_FLAG_NCQ = (1 << 10), /* host supports NCQ */
160 ATA_FLAG_HRST_TO_RESUME = (1 << 11), /* hardreset to resume phy */
161 ATA_FLAG_SKIP_D2H_BSY = (1 << 12), /* can't wait for the first D2H
162 * Register FIS clearing BSY */
163
164 ATA_FLAG_DEBUGMSG = (1 << 13),
165 ATA_FLAG_FLUSH_PORT_TASK = (1 << 14), /* flush port task */
166
167 ATA_FLAG_EH_PENDING = (1 << 15), /* EH pending */
168 ATA_FLAG_EH_IN_PROGRESS = (1 << 16), /* EH in progress */
169 ATA_FLAG_FROZEN = (1 << 17), /* port is frozen */
170 ATA_FLAG_RECOVERED = (1 << 18), /* recovery action performed */
171 ATA_FLAG_LOADING = (1 << 19), /* boot/loading probe */
172 ATA_FLAG_UNLOADING = (1 << 20), /* module is unloading */
173 ATA_FLAG_SCSI_HOTPLUG = (1 << 21), /* SCSI hotplug scheduled */
174
175 ATA_FLAG_DISABLED = (1 << 22), /* port is disabled, ignore it */
176 ATA_FLAG_SUSPENDED = (1 << 23), /* port is suspended (power) */
177
178 /* bits 24:31 of ap->flags are reserved for LLDD specific flags */
179
180 /* struct ata_queued_cmd flags */
181 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */
182 ATA_QCFLAG_SG = (1 << 1), /* have s/g table? */
183 ATA_QCFLAG_SINGLE = (1 << 2), /* no s/g, just a single buffer */
184 ATA_QCFLAG_DMAMAP = ATA_QCFLAG_SG | ATA_QCFLAG_SINGLE,
185 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */
186 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */
187
188 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */
189 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */
190 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */
191
192 /* host set flags */
193 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host_set only */
194
195 /* various lengths of time */
196 ATA_TMOUT_BOOT = 30 * HZ, /* heuristic */
197 ATA_TMOUT_BOOT_QUICK = 7 * HZ, /* heuristic */
198 ATA_TMOUT_INTERNAL = 30 * HZ,
199 ATA_TMOUT_INTERNAL_QUICK = 5 * HZ,
200
201 /* ATA bus states */
202 BUS_UNKNOWN = 0,
203 BUS_DMA = 1,
204 BUS_IDLE = 2,
205 BUS_NOINTR = 3,
206 BUS_NODATA = 4,
207 BUS_TIMER = 5,
208 BUS_PIO = 6,
209 BUS_EDD = 7,
210 BUS_IDENTIFY = 8,
211 BUS_PACKET = 9,
212
213 /* SATA port states */
214 PORT_UNKNOWN = 0,
215 PORT_ENABLED = 1,
216 PORT_DISABLED = 2,
217
218 /* encoding various smaller bitmaps into a single
219 * unsigned int bitmap
220 */
221 ATA_BITS_PIO = 5,
222 ATA_BITS_MWDMA = 3,
223 ATA_BITS_UDMA = 8,
224
225 ATA_SHIFT_PIO = 0,
226 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_BITS_PIO,
227 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_BITS_MWDMA,
228
229 ATA_MASK_PIO = ((1 << ATA_BITS_PIO) - 1) << ATA_SHIFT_PIO,
230 ATA_MASK_MWDMA = ((1 << ATA_BITS_MWDMA) - 1) << ATA_SHIFT_MWDMA,
231 ATA_MASK_UDMA = ((1 << ATA_BITS_UDMA) - 1) << ATA_SHIFT_UDMA,
232
233 /* size of buffer to pad xfers ending on unaligned boundaries */
234 ATA_DMA_PAD_SZ = 4,
235 ATA_DMA_PAD_BUF_SZ = ATA_DMA_PAD_SZ * ATA_MAX_QUEUE,
236
237 /* masks for port functions */
238 ATA_PORT_PRIMARY = (1 << 0),
239 ATA_PORT_SECONDARY = (1 << 1),
240
241 /* ering size */
242 ATA_ERING_SIZE = 32,
243
244 /* desc_len for ata_eh_info and context */
245 ATA_EH_DESC_LEN = 80,
246
247 /* reset / recovery action types */
248 ATA_EH_REVALIDATE = (1 << 0),
249 ATA_EH_SOFTRESET = (1 << 1),
250 ATA_EH_HARDRESET = (1 << 2),
251
252 ATA_EH_RESET_MASK = ATA_EH_SOFTRESET | ATA_EH_HARDRESET,
253 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE,
254
255 /* ata_eh_info->flags */
256 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */
257
258 ATA_EHI_DID_RESET = (1 << 16), /* already reset this port */
259
260 /* max repeat if error condition is still set after ->error_handler */
261 ATA_EH_MAX_REPEAT = 5,
262
263 /* how hard are we gonna try to probe/recover devices */
264 ATA_PROBE_MAX_TRIES = 3,
265 ATA_EH_RESET_TRIES = 3,
266 ATA_EH_DEV_TRIES = 3,
267
268 /* Drive spinup time (time from power-on to the first D2H FIS)
269 * in msecs - 8s currently. Failing to get ready in this time
270 * isn't critical. It will result in reset failure for
271 * controllers which can't wait for the first D2H FIS. libata
272 * will retry, so it just has to be long enough to spin up
273 * most devices.
274 */
275 ATA_SPINUP_WAIT = 8000,
276 };
277
278 enum hsm_task_states {
279 HSM_ST_UNKNOWN, /* state unknown */
280 HSM_ST_IDLE, /* no command on going */
281 HSM_ST, /* (waiting the device to) transfer data */
282 HSM_ST_LAST, /* (waiting the device to) complete command */
283 HSM_ST_ERR, /* error */
284 HSM_ST_FIRST, /* (waiting the device to)
285 write CDB or first data block */
286 };
287
288 enum ata_completion_errors {
289 AC_ERR_DEV = (1 << 0), /* device reported error */
290 AC_ERR_HSM = (1 << 1), /* host state machine violation */
291 AC_ERR_TIMEOUT = (1 << 2), /* timeout */
292 AC_ERR_MEDIA = (1 << 3), /* media error */
293 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */
294 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */
295 AC_ERR_SYSTEM = (1 << 6), /* system error */
296 AC_ERR_INVALID = (1 << 7), /* invalid argument */
297 AC_ERR_OTHER = (1 << 8), /* unknown */
298 };
299
300 /* forward declarations */
301 struct scsi_device;
302 struct ata_port_operations;
303 struct ata_port;
304 struct ata_queued_cmd;
305
306 /* typedefs */
307 typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
308 typedef int (*ata_prereset_fn_t)(struct ata_port *ap);
309 typedef int (*ata_reset_fn_t)(struct ata_port *ap, unsigned int *classes);
310 typedef void (*ata_postreset_fn_t)(struct ata_port *ap, unsigned int *classes);
311
312 struct ata_ioports {
313 unsigned long cmd_addr;
314 unsigned long data_addr;
315 unsigned long error_addr;
316 unsigned long feature_addr;
317 unsigned long nsect_addr;
318 unsigned long lbal_addr;
319 unsigned long lbam_addr;
320 unsigned long lbah_addr;
321 unsigned long device_addr;
322 unsigned long status_addr;
323 unsigned long command_addr;
324 unsigned long altstatus_addr;
325 unsigned long ctl_addr;
326 unsigned long bmdma_addr;
327 unsigned long scr_addr;
328 };
329
330 struct ata_probe_ent {
331 struct list_head node;
332 struct device *dev;
333 const struct ata_port_operations *port_ops;
334 struct scsi_host_template *sht;
335 struct ata_ioports port[ATA_MAX_PORTS];
336 unsigned int n_ports;
337 unsigned int hard_port_no;
338 unsigned int pio_mask;
339 unsigned int mwdma_mask;
340 unsigned int udma_mask;
341 unsigned int legacy_mode;
342 unsigned long irq;
343 unsigned int irq_flags;
344 unsigned long host_flags;
345 unsigned long host_set_flags;
346 void __iomem *mmio_base;
347 void *private_data;
348 };
349
350 struct ata_host_set {
351 spinlock_t lock;
352 struct device *dev;
353 unsigned long irq;
354 void __iomem *mmio_base;
355 unsigned int n_ports;
356 void *private_data;
357 const struct ata_port_operations *ops;
358 unsigned long flags;
359 int simplex_claimed; /* Keep seperate in case we
360 ever need to do this locked */
361 struct ata_host_set *next; /* for legacy mode */
362 struct ata_port *ports[0];
363 };
364
365 struct ata_queued_cmd {
366 struct ata_port *ap;
367 struct ata_device *dev;
368
369 struct scsi_cmnd *scsicmd;
370 void (*scsidone)(struct scsi_cmnd *);
371
372 struct ata_taskfile tf;
373 u8 cdb[ATAPI_CDB_LEN];
374
375 unsigned long flags; /* ATA_QCFLAG_xxx */
376 unsigned int tag;
377 unsigned int n_elem;
378 unsigned int orig_n_elem;
379
380 int dma_dir;
381
382 unsigned int pad_len;
383
384 unsigned int nsect;
385 unsigned int cursect;
386
387 unsigned int nbytes;
388 unsigned int curbytes;
389
390 unsigned int cursg;
391 unsigned int cursg_ofs;
392
393 struct scatterlist sgent;
394 struct scatterlist pad_sgent;
395 void *buf_virt;
396
397 /* DO NOT iterate over __sg manually, use ata_for_each_sg() */
398 struct scatterlist *__sg;
399
400 unsigned int err_mask;
401 struct ata_taskfile result_tf;
402 ata_qc_cb_t complete_fn;
403
404 void *private_data;
405 };
406
407 struct ata_host_stats {
408 unsigned long unhandled_irq;
409 unsigned long idle_irq;
410 unsigned long rw_reqbuf;
411 };
412
413 struct ata_ering_entry {
414 int is_io;
415 unsigned int err_mask;
416 u64 timestamp;
417 };
418
419 struct ata_ering {
420 int cursor;
421 struct ata_ering_entry ring[ATA_ERING_SIZE];
422 };
423
424 struct ata_device {
425 struct ata_port *ap;
426 unsigned int devno; /* 0 or 1 */
427 unsigned long flags; /* ATA_DFLAG_xxx */
428 struct scsi_device *sdev; /* attached SCSI device */
429 /* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */
430 u64 n_sectors; /* size of device, if ATA */
431 unsigned int class; /* ATA_DEV_xxx */
432 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
433 u8 pio_mode;
434 u8 dma_mode;
435 u8 xfer_mode;
436 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
437
438 unsigned int multi_count; /* sectors count for
439 READ/WRITE MULTIPLE */
440 unsigned int max_sectors; /* per-device max sectors */
441 unsigned int cdb_len;
442
443 /* per-dev xfer mask */
444 unsigned int pio_mask;
445 unsigned int mwdma_mask;
446 unsigned int udma_mask;
447
448 /* for CHS addressing */
449 u16 cylinders; /* Number of cylinders */
450 u16 heads; /* Number of heads */
451 u16 sectors; /* Number of sectors per track */
452
453 /* error history */
454 struct ata_ering ering;
455 };
456
457 /* Offset into struct ata_device. Fields above it are maintained
458 * acress device init. Fields below are zeroed.
459 */
460 #define ATA_DEVICE_CLEAR_OFFSET offsetof(struct ata_device, n_sectors)
461
462 struct ata_eh_info {
463 struct ata_device *dev; /* offending device */
464 u32 serror; /* SError from LLDD */
465 unsigned int err_mask; /* port-wide err_mask */
466 unsigned int action; /* ATA_EH_* action mask */
467 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */
468 unsigned int flags; /* ATA_EHI_* flags */
469
470 unsigned long hotplug_timestamp;
471 unsigned int probe_mask;
472
473 char desc[ATA_EH_DESC_LEN];
474 int desc_len;
475 };
476
477 struct ata_eh_context {
478 struct ata_eh_info i;
479 int tries[ATA_MAX_DEVICES];
480 unsigned int classes[ATA_MAX_DEVICES];
481 unsigned int did_probe_mask;
482 };
483
484 struct ata_port {
485 struct Scsi_Host *host; /* our co-allocated scsi host */
486 const struct ata_port_operations *ops;
487 spinlock_t *lock;
488 unsigned long flags; /* ATA_FLAG_xxx */
489 unsigned int id; /* unique id req'd by scsi midlyr */
490 unsigned int port_no; /* unique port #; from zero */
491 unsigned int hard_port_no; /* hardware port #; from zero */
492
493 struct ata_prd *prd; /* our SG list */
494 dma_addr_t prd_dma; /* and its DMA mapping */
495
496 void *pad; /* array of DMA pad buffers */
497 dma_addr_t pad_dma;
498
499 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
500
501 u8 ctl; /* cache of ATA control register */
502 u8 last_ctl; /* Cache last written value */
503 unsigned int pio_mask;
504 unsigned int mwdma_mask;
505 unsigned int udma_mask;
506 unsigned int cbl; /* cable type; ATA_CBL_xxx */
507 unsigned int hw_sata_spd_limit;
508 unsigned int sata_spd_limit; /* SATA PHY speed limit */
509
510 /* record runtime error info, protected by host_set lock */
511 struct ata_eh_info eh_info;
512 /* EH context owned by EH */
513 struct ata_eh_context eh_context;
514
515 struct ata_device device[ATA_MAX_DEVICES];
516
517 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
518 unsigned long qc_allocated;
519 unsigned int qc_active;
520
521 unsigned int active_tag;
522 u32 sactive;
523
524 struct ata_host_stats stats;
525 struct ata_host_set *host_set;
526 struct device *dev;
527
528 struct work_struct port_task;
529 struct work_struct hotplug_task;
530 struct work_struct scsi_rescan_task;
531
532 unsigned int hsm_task_state;
533
534 u32 msg_enable;
535 struct list_head eh_done_q;
536 wait_queue_head_t eh_wait_q;
537
538 void *private_data;
539
540 u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */
541 };
542
543 struct ata_port_operations {
544 void (*port_disable) (struct ata_port *);
545
546 void (*dev_config) (struct ata_port *, struct ata_device *);
547
548 void (*set_piomode) (struct ata_port *, struct ata_device *);
549 void (*set_dmamode) (struct ata_port *, struct ata_device *);
550 unsigned long (*mode_filter) (const struct ata_port *, struct ata_device *, unsigned long);
551
552 void (*tf_load) (struct ata_port *ap, const struct ata_taskfile *tf);
553 void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf);
554
555 void (*exec_command)(struct ata_port *ap, const struct ata_taskfile *tf);
556 u8 (*check_status)(struct ata_port *ap);
557 u8 (*check_altstatus)(struct ata_port *ap);
558 void (*dev_select)(struct ata_port *ap, unsigned int device);
559
560 void (*phy_reset) (struct ata_port *ap); /* obsolete */
561 void (*set_mode) (struct ata_port *ap);
562
563 void (*post_set_mode) (struct ata_port *ap);
564
565 int (*check_atapi_dma) (struct ata_queued_cmd *qc);
566
567 void (*bmdma_setup) (struct ata_queued_cmd *qc);
568 void (*bmdma_start) (struct ata_queued_cmd *qc);
569
570 void (*data_xfer) (struct ata_device *, unsigned char *, unsigned int, int);
571
572 void (*qc_prep) (struct ata_queued_cmd *qc);
573 unsigned int (*qc_issue) (struct ata_queued_cmd *qc);
574
575 /* Error handlers. ->error_handler overrides ->eng_timeout and
576 * indicates that new-style EH is in place.
577 */
578 void (*eng_timeout) (struct ata_port *ap); /* obsolete */
579
580 void (*freeze) (struct ata_port *ap);
581 void (*thaw) (struct ata_port *ap);
582 void (*error_handler) (struct ata_port *ap);
583 void (*post_internal_cmd) (struct ata_queued_cmd *qc);
584
585 irqreturn_t (*irq_handler)(int, void *, struct pt_regs *);
586 void (*irq_clear) (struct ata_port *);
587
588 u32 (*scr_read) (struct ata_port *ap, unsigned int sc_reg);
589 void (*scr_write) (struct ata_port *ap, unsigned int sc_reg,
590 u32 val);
591
592 int (*port_start) (struct ata_port *ap);
593 void (*port_stop) (struct ata_port *ap);
594
595 void (*host_stop) (struct ata_host_set *host_set);
596
597 void (*bmdma_stop) (struct ata_queued_cmd *qc);
598 u8 (*bmdma_status) (struct ata_port *ap);
599 };
600
601 struct ata_port_info {
602 struct scsi_host_template *sht;
603 unsigned long host_flags;
604 unsigned long pio_mask;
605 unsigned long mwdma_mask;
606 unsigned long udma_mask;
607 const struct ata_port_operations *port_ops;
608 void *private_data;
609 };
610
611 struct ata_timing {
612 unsigned short mode; /* ATA mode */
613 unsigned short setup; /* t1 */
614 unsigned short act8b; /* t2 for 8-bit I/O */
615 unsigned short rec8b; /* t2i for 8-bit I/O */
616 unsigned short cyc8b; /* t0 for 8-bit I/O */
617 unsigned short active; /* t2 or tD */
618 unsigned short recover; /* t2i or tK */
619 unsigned short cycle; /* t0 */
620 unsigned short udma; /* t2CYCTYP/2 */
621 };
622
623 #define FIT(v,vmin,vmax) max_t(short,min_t(short,v,vmax),vmin)
624
625 extern const unsigned long sata_deb_timing_boot[];
626 extern const unsigned long sata_deb_timing_eh[];
627 extern const unsigned long sata_deb_timing_before_fsrst[];
628
629 extern void ata_port_probe(struct ata_port *);
630 extern void __sata_phy_reset(struct ata_port *ap);
631 extern void sata_phy_reset(struct ata_port *ap);
632 extern void ata_bus_reset(struct ata_port *ap);
633 extern int sata_set_spd(struct ata_port *ap);
634 extern int sata_phy_debounce(struct ata_port *ap, const unsigned long *param);
635 extern int sata_phy_resume(struct ata_port *ap, const unsigned long *param);
636 extern int ata_std_prereset(struct ata_port *ap);
637 extern int ata_std_softreset(struct ata_port *ap, unsigned int *classes);
638 extern int sata_std_hardreset(struct ata_port *ap, unsigned int *class);
639 extern void ata_std_postreset(struct ata_port *ap, unsigned int *classes);
640 extern int ata_dev_revalidate(struct ata_device *dev, int post_reset);
641 extern void ata_port_disable(struct ata_port *);
642 extern void ata_std_ports(struct ata_ioports *ioaddr);
643 #ifdef CONFIG_PCI
644 extern int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info,
645 unsigned int n_ports);
646 extern void ata_pci_remove_one (struct pci_dev *pdev);
647 extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t state);
648 extern int ata_pci_device_resume(struct pci_dev *pdev);
649 extern int ata_pci_clear_simplex(struct pci_dev *pdev);
650 #endif /* CONFIG_PCI */
651 extern int ata_device_add(const struct ata_probe_ent *ent);
652 extern void ata_port_detach(struct ata_port *ap);
653 extern void ata_host_set_remove(struct ata_host_set *host_set);
654 extern int ata_scsi_detect(struct scsi_host_template *sht);
655 extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
656 extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *));
657 extern int ata_scsi_release(struct Scsi_Host *host);
658 extern unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc);
659 extern int sata_scr_valid(struct ata_port *ap);
660 extern int sata_scr_read(struct ata_port *ap, int reg, u32 *val);
661 extern int sata_scr_write(struct ata_port *ap, int reg, u32 val);
662 extern int sata_scr_write_flush(struct ata_port *ap, int reg, u32 val);
663 extern int ata_port_online(struct ata_port *ap);
664 extern int ata_port_offline(struct ata_port *ap);
665 extern int ata_scsi_device_resume(struct scsi_device *);
666 extern int ata_scsi_device_suspend(struct scsi_device *, pm_message_t state);
667 extern int ata_device_resume(struct ata_device *);
668 extern int ata_device_suspend(struct ata_device *, pm_message_t state);
669 extern int ata_ratelimit(void);
670 extern unsigned int ata_busy_sleep(struct ata_port *ap,
671 unsigned long timeout_pat,
672 unsigned long timeout);
673 extern void ata_port_queue_task(struct ata_port *ap, void (*fn)(void *),
674 void *data, unsigned long delay);
675 extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
676 unsigned long interval_msec,
677 unsigned long timeout_msec);
678
679 /*
680 * Default driver ops implementations
681 */
682 extern void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
683 extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
684 extern void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp);
685 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
686 extern void ata_noop_dev_select (struct ata_port *ap, unsigned int device);
687 extern void ata_std_dev_select (struct ata_port *ap, unsigned int device);
688 extern u8 ata_check_status(struct ata_port *ap);
689 extern u8 ata_altstatus(struct ata_port *ap);
690 extern void ata_exec_command(struct ata_port *ap, const struct ata_taskfile *tf);
691 extern int ata_port_start (struct ata_port *ap);
692 extern void ata_port_stop (struct ata_port *ap);
693 extern void ata_host_stop (struct ata_host_set *host_set);
694 extern irqreturn_t ata_interrupt (int irq, void *dev_instance, struct pt_regs *regs);
695 extern void ata_mmio_data_xfer(struct ata_device *adev, unsigned char *buf,
696 unsigned int buflen, int write_data);
697 extern void ata_pio_data_xfer(struct ata_device *adev, unsigned char *buf,
698 unsigned int buflen, int write_data);
699 extern void ata_pio_data_xfer_noirq(struct ata_device *adev, unsigned char *buf,
700 unsigned int buflen, int write_data);
701 extern void ata_qc_prep(struct ata_queued_cmd *qc);
702 extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
703 extern unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc);
704 extern void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf,
705 unsigned int buflen);
706 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
707 unsigned int n_elem);
708 extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
709 extern void ata_id_string(const u16 *id, unsigned char *s,
710 unsigned int ofs, unsigned int len);
711 extern void ata_id_c_string(const u16 *id, unsigned char *s,
712 unsigned int ofs, unsigned int len);
713 extern void ata_bmdma_setup (struct ata_queued_cmd *qc);
714 extern void ata_bmdma_start (struct ata_queued_cmd *qc);
715 extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
716 extern u8 ata_bmdma_status(struct ata_port *ap);
717 extern void ata_bmdma_irq_clear(struct ata_port *ap);
718 extern void ata_bmdma_freeze(struct ata_port *ap);
719 extern void ata_bmdma_thaw(struct ata_port *ap);
720 extern void ata_bmdma_drive_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
721 ata_reset_fn_t softreset,
722 ata_reset_fn_t hardreset,
723 ata_postreset_fn_t postreset);
724 extern void ata_bmdma_error_handler(struct ata_port *ap);
725 extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc);
726 extern int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
727 u8 status, int in_wq);
728 extern void ata_qc_complete(struct ata_queued_cmd *qc);
729 extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active,
730 void (*finish_qc)(struct ata_queued_cmd *));
731 extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
732 void (*done)(struct scsi_cmnd *));
733 extern int ata_std_bios_param(struct scsi_device *sdev,
734 struct block_device *bdev,
735 sector_t capacity, int geom[]);
736 extern int ata_scsi_slave_config(struct scsi_device *sdev);
737 extern void ata_scsi_slave_destroy(struct scsi_device *sdev);
738 extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
739 int queue_depth);
740 extern struct ata_device *ata_dev_pair(struct ata_device *adev);
741
742 /*
743 * Timing helpers
744 */
745
746 extern unsigned int ata_pio_need_iordy(const struct ata_device *);
747 extern int ata_timing_compute(struct ata_device *, unsigned short,
748 struct ata_timing *, int, int);
749 extern void ata_timing_merge(const struct ata_timing *,
750 const struct ata_timing *, struct ata_timing *,
751 unsigned int);
752
753 enum {
754 ATA_TIMING_SETUP = (1 << 0),
755 ATA_TIMING_ACT8B = (1 << 1),
756 ATA_TIMING_REC8B = (1 << 2),
757 ATA_TIMING_CYC8B = (1 << 3),
758 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
759 ATA_TIMING_CYC8B,
760 ATA_TIMING_ACTIVE = (1 << 4),
761 ATA_TIMING_RECOVER = (1 << 5),
762 ATA_TIMING_CYCLE = (1 << 6),
763 ATA_TIMING_UDMA = (1 << 7),
764 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
765 ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
766 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
767 ATA_TIMING_CYCLE | ATA_TIMING_UDMA,
768 };
769
770
771 #ifdef CONFIG_PCI
772 struct pci_bits {
773 unsigned int reg; /* PCI config register to read */
774 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
775 unsigned long mask;
776 unsigned long val;
777 };
778
779 extern void ata_pci_host_stop (struct ata_host_set *host_set);
780 extern struct ata_probe_ent *
781 ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port, int portmask);
782 extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
783 extern unsigned long ata_pci_default_filter(const struct ata_port *, struct ata_device *, unsigned long);
784 #endif /* CONFIG_PCI */
785
786 /*
787 * EH
788 */
789 extern void ata_eng_timeout(struct ata_port *ap);
790
791 extern void ata_port_schedule_eh(struct ata_port *ap);
792 extern int ata_port_abort(struct ata_port *ap);
793 extern int ata_port_freeze(struct ata_port *ap);
794
795 extern void ata_eh_freeze_port(struct ata_port *ap);
796 extern void ata_eh_thaw_port(struct ata_port *ap);
797
798 extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
799 extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
800
801 extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
802 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
803 ata_postreset_fn_t postreset);
804
805 /*
806 * printk helpers
807 */
808 #define ata_port_printk(ap, lv, fmt, args...) \
809 printk(lv"ata%u: "fmt, (ap)->id , ##args)
810
811 #define ata_dev_printk(dev, lv, fmt, args...) \
812 printk(lv"ata%u.%02u: "fmt, (dev)->ap->id, (dev)->devno , ##args)
813
814 /*
815 * ata_eh_info helpers
816 */
817 #define ata_ehi_push_desc(ehi, fmt, args...) do { \
818 (ehi)->desc_len += scnprintf((ehi)->desc + (ehi)->desc_len, \
819 ATA_EH_DESC_LEN - (ehi)->desc_len, \
820 fmt , ##args); \
821 } while (0)
822
823 #define ata_ehi_clear_desc(ehi) do { \
824 (ehi)->desc[0] = '\0'; \
825 (ehi)->desc_len = 0; \
826 } while (0)
827
828 static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
829 {
830 if (ehi->flags & ATA_EHI_HOTPLUGGED)
831 return;
832
833 ehi->flags |= ATA_EHI_HOTPLUGGED;
834 ehi->hotplug_timestamp = jiffies;
835
836 ehi->err_mask |= AC_ERR_ATA_BUS;
837 ehi->action |= ATA_EH_SOFTRESET;
838 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
839 }
840
841 /*
842 * qc helpers
843 */
844 static inline int
845 ata_sg_is_last(struct scatterlist *sg, struct ata_queued_cmd *qc)
846 {
847 if (sg == &qc->pad_sgent)
848 return 1;
849 if (qc->pad_len)
850 return 0;
851 if (((sg - qc->__sg) + 1) == qc->n_elem)
852 return 1;
853 return 0;
854 }
855
856 static inline struct scatterlist *
857 ata_qc_first_sg(struct ata_queued_cmd *qc)
858 {
859 if (qc->n_elem)
860 return qc->__sg;
861 if (qc->pad_len)
862 return &qc->pad_sgent;
863 return NULL;
864 }
865
866 static inline struct scatterlist *
867 ata_qc_next_sg(struct scatterlist *sg, struct ata_queued_cmd *qc)
868 {
869 if (sg == &qc->pad_sgent)
870 return NULL;
871 if (++sg - qc->__sg < qc->n_elem)
872 return sg;
873 if (qc->pad_len)
874 return &qc->pad_sgent;
875 return NULL;
876 }
877
878 #define ata_for_each_sg(sg, qc) \
879 for (sg = ata_qc_first_sg(qc); sg; sg = ata_qc_next_sg(sg, qc))
880
881 static inline unsigned int ata_tag_valid(unsigned int tag)
882 {
883 return (tag < ATA_MAX_QUEUE) ? 1 : 0;
884 }
885
886 static inline unsigned int ata_tag_internal(unsigned int tag)
887 {
888 return tag == ATA_MAX_QUEUE - 1;
889 }
890
891 /*
892 * device helpers
893 */
894 static inline unsigned int ata_class_enabled(unsigned int class)
895 {
896 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI;
897 }
898
899 static inline unsigned int ata_class_disabled(unsigned int class)
900 {
901 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP;
902 }
903
904 static inline unsigned int ata_class_absent(unsigned int class)
905 {
906 return !ata_class_enabled(class) && !ata_class_disabled(class);
907 }
908
909 static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
910 {
911 return ata_class_enabled(dev->class);
912 }
913
914 static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
915 {
916 return ata_class_disabled(dev->class);
917 }
918
919 static inline unsigned int ata_dev_absent(const struct ata_device *dev)
920 {
921 return ata_class_absent(dev->class);
922 }
923
924 /*
925 * port helpers
926 */
927 static inline int ata_port_max_devices(const struct ata_port *ap)
928 {
929 if (ap->flags & ATA_FLAG_SLAVE_POSS)
930 return 2;
931 return 1;
932 }
933
934
935 static inline u8 ata_chk_status(struct ata_port *ap)
936 {
937 return ap->ops->check_status(ap);
938 }
939
940
941 /**
942 * ata_pause - Flush writes and pause 400 nanoseconds.
943 * @ap: Port to wait for.
944 *
945 * LOCKING:
946 * Inherited from caller.
947 */
948
949 static inline void ata_pause(struct ata_port *ap)
950 {
951 ata_altstatus(ap);
952 ndelay(400);
953 }
954
955
956 /**
957 * ata_busy_wait - Wait for a port status register
958 * @ap: Port to wait for.
959 *
960 * Waits up to max*10 microseconds for the selected bits in the port's
961 * status register to be cleared.
962 * Returns final value of status register.
963 *
964 * LOCKING:
965 * Inherited from caller.
966 */
967
968 static inline u8 ata_busy_wait(struct ata_port *ap, unsigned int bits,
969 unsigned int max)
970 {
971 u8 status;
972
973 do {
974 udelay(10);
975 status = ata_chk_status(ap);
976 max--;
977 } while ((status & bits) && (max > 0));
978
979 return status;
980 }
981
982
983 /**
984 * ata_wait_idle - Wait for a port to be idle.
985 * @ap: Port to wait for.
986 *
987 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
988 * Returns final value of status register.
989 *
990 * LOCKING:
991 * Inherited from caller.
992 */
993
994 static inline u8 ata_wait_idle(struct ata_port *ap)
995 {
996 u8 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
997
998 if (status & (ATA_BUSY | ATA_DRQ)) {
999 unsigned long l = ap->ioaddr.status_addr;
1000 if (ata_msg_warn(ap))
1001 printk(KERN_WARNING "ATA: abnormal status 0x%X on port 0x%lX\n",
1002 status, l);
1003 }
1004
1005 return status;
1006 }
1007
1008 static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
1009 {
1010 qc->tf.ctl |= ATA_NIEN;
1011 }
1012
1013 static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap,
1014 unsigned int tag)
1015 {
1016 if (likely(ata_tag_valid(tag)))
1017 return &ap->qcmd[tag];
1018 return NULL;
1019 }
1020
1021 static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap,
1022 unsigned int tag)
1023 {
1024 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
1025
1026 if (unlikely(!qc) || !ap->ops->error_handler)
1027 return qc;
1028
1029 if ((qc->flags & (ATA_QCFLAG_ACTIVE |
1030 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE)
1031 return qc;
1032
1033 return NULL;
1034 }
1035
1036 static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
1037 {
1038 memset(tf, 0, sizeof(*tf));
1039
1040 tf->ctl = dev->ap->ctl;
1041 if (dev->devno == 0)
1042 tf->device = ATA_DEVICE_OBS;
1043 else
1044 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
1045 }
1046
1047 static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
1048 {
1049 qc->__sg = NULL;
1050 qc->flags = 0;
1051 qc->cursect = qc->cursg = qc->cursg_ofs = 0;
1052 qc->nsect = 0;
1053 qc->nbytes = qc->curbytes = 0;
1054 qc->err_mask = 0;
1055
1056 ata_tf_init(qc->dev, &qc->tf);
1057
1058 /* init result_tf such that it indicates normal completion */
1059 qc->result_tf.command = ATA_DRDY;
1060 qc->result_tf.feature = 0;
1061 }
1062
1063 /**
1064 * ata_irq_on - Enable interrupts on a port.
1065 * @ap: Port on which interrupts are enabled.
1066 *
1067 * Enable interrupts on a legacy IDE device using MMIO or PIO,
1068 * wait for idle, clear any pending interrupts.
1069 *
1070 * LOCKING:
1071 * Inherited from caller.
1072 */
1073
1074 static inline u8 ata_irq_on(struct ata_port *ap)
1075 {
1076 struct ata_ioports *ioaddr = &ap->ioaddr;
1077 u8 tmp;
1078
1079 ap->ctl &= ~ATA_NIEN;
1080 ap->last_ctl = ap->ctl;
1081
1082 if (ap->flags & ATA_FLAG_MMIO)
1083 writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr);
1084 else
1085 outb(ap->ctl, ioaddr->ctl_addr);
1086 tmp = ata_wait_idle(ap);
1087
1088 ap->ops->irq_clear(ap);
1089
1090 return tmp;
1091 }
1092
1093
1094 /**
1095 * ata_irq_ack - Acknowledge a device interrupt.
1096 * @ap: Port on which interrupts are enabled.
1097 *
1098 * Wait up to 10 ms for legacy IDE device to become idle (BUSY
1099 * or BUSY+DRQ clear). Obtain dma status and port status from
1100 * device. Clear the interrupt. Return port status.
1101 *
1102 * LOCKING:
1103 */
1104
1105 static inline u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq)
1106 {
1107 unsigned int bits = chk_drq ? ATA_BUSY | ATA_DRQ : ATA_BUSY;
1108 u8 host_stat, post_stat, status;
1109
1110 status = ata_busy_wait(ap, bits, 1000);
1111 if (status & bits)
1112 if (ata_msg_err(ap))
1113 printk(KERN_ERR "abnormal status 0x%X\n", status);
1114
1115 /* get controller status; clear intr, err bits */
1116 if (ap->flags & ATA_FLAG_MMIO) {
1117 void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr;
1118 host_stat = readb(mmio + ATA_DMA_STATUS);
1119 writeb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR,
1120 mmio + ATA_DMA_STATUS);
1121
1122 post_stat = readb(mmio + ATA_DMA_STATUS);
1123 } else {
1124 host_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
1125 outb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR,
1126 ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
1127
1128 post_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
1129 }
1130
1131 if (ata_msg_intr(ap))
1132 printk(KERN_INFO "%s: irq ack: host_stat 0x%X, new host_stat 0x%X, drv_stat 0x%X\n",
1133 __FUNCTION__,
1134 host_stat, post_stat, status);
1135
1136 return status;
1137 }
1138
1139 static inline int ata_try_flush_cache(const struct ata_device *dev)
1140 {
1141 return ata_id_wcache_enabled(dev->id) ||
1142 ata_id_has_flush(dev->id) ||
1143 ata_id_has_flush_ext(dev->id);
1144 }
1145
1146 static inline unsigned int ac_err_mask(u8 status)
1147 {
1148 if (status & (ATA_BUSY | ATA_DRQ))
1149 return AC_ERR_HSM;
1150 if (status & (ATA_ERR | ATA_DF))
1151 return AC_ERR_DEV;
1152 return 0;
1153 }
1154
1155 static inline unsigned int __ac_err_mask(u8 status)
1156 {
1157 unsigned int mask = ac_err_mask(status);
1158 if (mask == 0)
1159 return AC_ERR_OTHER;
1160 return mask;
1161 }
1162
1163 static inline int ata_pad_alloc(struct ata_port *ap, struct device *dev)
1164 {
1165 ap->pad_dma = 0;
1166 ap->pad = dma_alloc_coherent(dev, ATA_DMA_PAD_BUF_SZ,
1167 &ap->pad_dma, GFP_KERNEL);
1168 return (ap->pad == NULL) ? -ENOMEM : 0;
1169 }
1170
1171 static inline void ata_pad_free(struct ata_port *ap, struct device *dev)
1172 {
1173 dma_free_coherent(dev, ATA_DMA_PAD_BUF_SZ, ap->pad, ap->pad_dma);
1174 }
1175
1176 static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
1177 {
1178 return (struct ata_port *) &host->hostdata[0];
1179 }
1180
1181 #endif /* __LINUX_LIBATA_H__ */
Linux kernel - Deliverables
This page took 0.070392 seconds and 6 git commands to generate.