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[PATCH] NOMMU: move the fallback arch_vma_name() to a sensible place
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / include / linux / libata.h
1 /*
2 * Copyright 2003-2005 Red Hat, Inc. All rights reserved.
3 * Copyright 2003-2005 Jeff Garzik
4 *
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2, or (at your option)
9 * any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; see the file COPYING. If not, write to
18 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
19 *
20 *
21 * libata documentation is available via 'make {ps|pdf}docs',
22 * as Documentation/DocBook/libata.*
23 *
24 */
25
26 #ifndef __LINUX_LIBATA_H__
27 #define __LINUX_LIBATA_H__
28
29 #include <linux/delay.h>
30 #include <linux/interrupt.h>
31 #include <linux/pci.h>
32 #include <linux/dma-mapping.h>
33 #include <asm/scatterlist.h>
34 #include <asm/io.h>
35 #include <linux/ata.h>
36 #include <linux/workqueue.h>
37 #include <scsi/scsi_host.h>
38
39 /*
40 * Define if arch has non-standard setup. This is a _PCI_ standard
41 * not a legacy or ISA standard.
42 */
43 #ifdef CONFIG_ATA_NONSTANDARD
44 #include <asm/libata-portmap.h>
45 #else
46 #include <asm-generic/libata-portmap.h>
47 #endif
48
49 /*
50 * compile-time options: to be removed as soon as all the drivers are
51 * converted to the new debugging mechanism
52 */
53 #undef ATA_DEBUG /* debugging output */
54 #undef ATA_VERBOSE_DEBUG /* yet more debugging output */
55 #undef ATA_IRQ_TRAP /* define to ack screaming irqs */
56 #undef ATA_NDEBUG /* define to disable quick runtime checks */
57 #define ATA_ENABLE_PATA /* define to enable PATA support in some
58 * low-level drivers */
59
60
61 /* note: prints function name for you */
62 #ifdef ATA_DEBUG
63 #define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
64 #ifdef ATA_VERBOSE_DEBUG
65 #define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
66 #else
67 #define VPRINTK(fmt, args...)
68 #endif /* ATA_VERBOSE_DEBUG */
69 #else
70 #define DPRINTK(fmt, args...)
71 #define VPRINTK(fmt, args...)
72 #endif /* ATA_DEBUG */
73
74 #define BPRINTK(fmt, args...) if (ap->flags & ATA_FLAG_DEBUGMSG) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
75
76 /* NEW: debug levels */
77 #define HAVE_LIBATA_MSG 1
78
79 enum {
80 ATA_MSG_DRV = 0x0001,
81 ATA_MSG_INFO = 0x0002,
82 ATA_MSG_PROBE = 0x0004,
83 ATA_MSG_WARN = 0x0008,
84 ATA_MSG_MALLOC = 0x0010,
85 ATA_MSG_CTL = 0x0020,
86 ATA_MSG_INTR = 0x0040,
87 ATA_MSG_ERR = 0x0080,
88 };
89
90 #define ata_msg_drv(p) ((p)->msg_enable & ATA_MSG_DRV)
91 #define ata_msg_info(p) ((p)->msg_enable & ATA_MSG_INFO)
92 #define ata_msg_probe(p) ((p)->msg_enable & ATA_MSG_PROBE)
93 #define ata_msg_warn(p) ((p)->msg_enable & ATA_MSG_WARN)
94 #define ata_msg_malloc(p) ((p)->msg_enable & ATA_MSG_MALLOC)
95 #define ata_msg_ctl(p) ((p)->msg_enable & ATA_MSG_CTL)
96 #define ata_msg_intr(p) ((p)->msg_enable & ATA_MSG_INTR)
97 #define ata_msg_err(p) ((p)->msg_enable & ATA_MSG_ERR)
98
99 static inline u32 ata_msg_init(int dval, int default_msg_enable_bits)
100 {
101 if (dval < 0 || dval >= (sizeof(u32) * 8))
102 return default_msg_enable_bits; /* should be 0x1 - only driver info msgs */
103 if (!dval)
104 return 0;
105 return (1 << dval) - 1;
106 }
107
108 /* defines only for the constants which don't work well as enums */
109 #define ATA_TAG_POISON 0xfafbfcfdU
110
111 /* move to PCI layer? */
112 static inline struct device *pci_dev_to_dev(struct pci_dev *pdev)
113 {
114 return &pdev->dev;
115 }
116
117 enum {
118 /* various global constants */
119 LIBATA_MAX_PRD = ATA_MAX_PRD / 2,
120 ATA_MAX_PORTS = 8,
121 ATA_DEF_QUEUE = 1,
122 /* tag ATA_MAX_QUEUE - 1 is reserved for internal commands */
123 ATA_MAX_QUEUE = 32,
124 ATA_TAG_INTERNAL = ATA_MAX_QUEUE - 1,
125 ATA_MAX_BUS = 2,
126 ATA_DEF_BUSY_WAIT = 10000,
127 ATA_SHORT_PAUSE = (HZ >> 6) + 1,
128
129 ATA_SHT_EMULATED = 1,
130 ATA_SHT_CMD_PER_LUN = 1,
131 ATA_SHT_THIS_ID = -1,
132 ATA_SHT_USE_CLUSTERING = 1,
133
134 /* struct ata_device stuff */
135 ATA_DFLAG_LBA = (1 << 0), /* device supports LBA */
136 ATA_DFLAG_LBA48 = (1 << 1), /* device supports LBA48 */
137 ATA_DFLAG_CDB_INTR = (1 << 2), /* device asserts INTRQ when ready for CDB */
138 ATA_DFLAG_NCQ = (1 << 3), /* device supports NCQ */
139 ATA_DFLAG_CFG_MASK = (1 << 8) - 1,
140
141 ATA_DFLAG_PIO = (1 << 8), /* device currently in PIO mode */
142 ATA_DFLAG_SUSPENDED = (1 << 9), /* device suspended */
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
174 /* The following flag belongs to ap->pflags but is kept in
175 * ap->flags because it's referenced in many LLDs and will be
176 * removed in not-too-distant future.
177 */
178 ATA_FLAG_DISABLED = (1 << 23), /* port is disabled, ignore it */
179
180 /* bits 24:31 of ap->flags are reserved for LLD specific flags */
181
182 /* struct ata_port pflags */
183 ATA_PFLAG_EH_PENDING = (1 << 0), /* EH pending */
184 ATA_PFLAG_EH_IN_PROGRESS = (1 << 1), /* EH in progress */
185 ATA_PFLAG_FROZEN = (1 << 2), /* port is frozen */
186 ATA_PFLAG_RECOVERED = (1 << 3), /* recovery action performed */
187 ATA_PFLAG_LOADING = (1 << 4), /* boot/loading probe */
188 ATA_PFLAG_UNLOADING = (1 << 5), /* module is unloading */
189 ATA_PFLAG_SCSI_HOTPLUG = (1 << 6), /* SCSI hotplug scheduled */
190
191 ATA_PFLAG_FLUSH_PORT_TASK = (1 << 16), /* flush port task */
192 ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */
193 ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */
194
195 /* struct ata_queued_cmd flags */
196 ATA_QCFLAG_ACTIVE = (1 << 0), /* cmd not yet ack'd to scsi lyer */
197 ATA_QCFLAG_SG = (1 << 1), /* have s/g table? */
198 ATA_QCFLAG_SINGLE = (1 << 2), /* no s/g, just a single buffer */
199 ATA_QCFLAG_DMAMAP = ATA_QCFLAG_SG | ATA_QCFLAG_SINGLE,
200 ATA_QCFLAG_IO = (1 << 3), /* standard IO command */
201 ATA_QCFLAG_RESULT_TF = (1 << 4), /* result TF requested */
202
203 ATA_QCFLAG_FAILED = (1 << 16), /* cmd failed and is owned by EH */
204 ATA_QCFLAG_SENSE_VALID = (1 << 17), /* sense data valid */
205 ATA_QCFLAG_EH_SCHEDULED = (1 << 18), /* EH scheduled (obsolete) */
206
207 /* host set flags */
208 ATA_HOST_SIMPLEX = (1 << 0), /* Host is simplex, one DMA channel per host only */
209
210 /* various lengths of time */
211 ATA_TMOUT_BOOT = 30 * HZ, /* heuristic */
212 ATA_TMOUT_BOOT_QUICK = 7 * HZ, /* heuristic */
213 ATA_TMOUT_INTERNAL = 30 * HZ,
214 ATA_TMOUT_INTERNAL_QUICK = 5 * HZ,
215
216 /* ATA bus states */
217 BUS_UNKNOWN = 0,
218 BUS_DMA = 1,
219 BUS_IDLE = 2,
220 BUS_NOINTR = 3,
221 BUS_NODATA = 4,
222 BUS_TIMER = 5,
223 BUS_PIO = 6,
224 BUS_EDD = 7,
225 BUS_IDENTIFY = 8,
226 BUS_PACKET = 9,
227
228 /* SATA port states */
229 PORT_UNKNOWN = 0,
230 PORT_ENABLED = 1,
231 PORT_DISABLED = 2,
232
233 /* encoding various smaller bitmaps into a single
234 * unsigned int bitmap
235 */
236 ATA_BITS_PIO = 7,
237 ATA_BITS_MWDMA = 5,
238 ATA_BITS_UDMA = 8,
239
240 ATA_SHIFT_PIO = 0,
241 ATA_SHIFT_MWDMA = ATA_SHIFT_PIO + ATA_BITS_PIO,
242 ATA_SHIFT_UDMA = ATA_SHIFT_MWDMA + ATA_BITS_MWDMA,
243
244 ATA_MASK_PIO = ((1 << ATA_BITS_PIO) - 1) << ATA_SHIFT_PIO,
245 ATA_MASK_MWDMA = ((1 << ATA_BITS_MWDMA) - 1) << ATA_SHIFT_MWDMA,
246 ATA_MASK_UDMA = ((1 << ATA_BITS_UDMA) - 1) << ATA_SHIFT_UDMA,
247
248 /* size of buffer to pad xfers ending on unaligned boundaries */
249 ATA_DMA_PAD_SZ = 4,
250 ATA_DMA_PAD_BUF_SZ = ATA_DMA_PAD_SZ * ATA_MAX_QUEUE,
251
252 /* masks for port functions */
253 ATA_PORT_PRIMARY = (1 << 0),
254 ATA_PORT_SECONDARY = (1 << 1),
255
256 /* ering size */
257 ATA_ERING_SIZE = 32,
258
259 /* desc_len for ata_eh_info and context */
260 ATA_EH_DESC_LEN = 80,
261
262 /* reset / recovery action types */
263 ATA_EH_REVALIDATE = (1 << 0),
264 ATA_EH_SOFTRESET = (1 << 1),
265 ATA_EH_HARDRESET = (1 << 2),
266 ATA_EH_SUSPEND = (1 << 3),
267 ATA_EH_RESUME = (1 << 4),
268 ATA_EH_PM_FREEZE = (1 << 5),
269
270 ATA_EH_RESET_MASK = ATA_EH_SOFTRESET | ATA_EH_HARDRESET,
271 ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE | ATA_EH_SUSPEND |
272 ATA_EH_RESUME | ATA_EH_PM_FREEZE,
273
274 /* ata_eh_info->flags */
275 ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */
276 ATA_EHI_RESUME_LINK = (1 << 1), /* resume link (reset modifier) */
277 ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */
278 ATA_EHI_QUIET = (1 << 3), /* be quiet */
279
280 ATA_EHI_DID_RESET = (1 << 16), /* already reset this port */
281
282 ATA_EHI_RESET_MODIFIER_MASK = ATA_EHI_RESUME_LINK,
283
284 /* max repeat if error condition is still set after ->error_handler */
285 ATA_EH_MAX_REPEAT = 5,
286
287 /* how hard are we gonna try to probe/recover devices */
288 ATA_PROBE_MAX_TRIES = 3,
289 ATA_EH_RESET_TRIES = 3,
290 ATA_EH_DEV_TRIES = 3,
291
292 /* Drive spinup time (time from power-on to the first D2H FIS)
293 * in msecs - 8s currently. Failing to get ready in this time
294 * isn't critical. It will result in reset failure for
295 * controllers which can't wait for the first D2H FIS. libata
296 * will retry, so it just has to be long enough to spin up
297 * most devices.
298 */
299 ATA_SPINUP_WAIT = 8000,
300
301 /* Horkage types. May be set by libata or controller on drives
302 (some horkage may be drive/controller pair dependant */
303
304 ATA_HORKAGE_DIAGNOSTIC = (1 << 0), /* Failed boot diag */
305 };
306
307 enum hsm_task_states {
308 HSM_ST_UNKNOWN, /* state unknown */
309 HSM_ST_IDLE, /* no command on going */
310 HSM_ST, /* (waiting the device to) transfer data */
311 HSM_ST_LAST, /* (waiting the device to) complete command */
312 HSM_ST_ERR, /* error */
313 HSM_ST_FIRST, /* (waiting the device to)
314 write CDB or first data block */
315 };
316
317 enum ata_completion_errors {
318 AC_ERR_DEV = (1 << 0), /* device reported error */
319 AC_ERR_HSM = (1 << 1), /* host state machine violation */
320 AC_ERR_TIMEOUT = (1 << 2), /* timeout */
321 AC_ERR_MEDIA = (1 << 3), /* media error */
322 AC_ERR_ATA_BUS = (1 << 4), /* ATA bus error */
323 AC_ERR_HOST_BUS = (1 << 5), /* host bus error */
324 AC_ERR_SYSTEM = (1 << 6), /* system error */
325 AC_ERR_INVALID = (1 << 7), /* invalid argument */
326 AC_ERR_OTHER = (1 << 8), /* unknown */
327 };
328
329 /* forward declarations */
330 struct scsi_device;
331 struct ata_port_operations;
332 struct ata_port;
333 struct ata_queued_cmd;
334
335 /* typedefs */
336 typedef void (*ata_qc_cb_t) (struct ata_queued_cmd *qc);
337 typedef int (*ata_prereset_fn_t)(struct ata_port *ap);
338 typedef int (*ata_reset_fn_t)(struct ata_port *ap, unsigned int *classes);
339 typedef void (*ata_postreset_fn_t)(struct ata_port *ap, unsigned int *classes);
340
341 struct ata_ioports {
342 unsigned long cmd_addr;
343 unsigned long data_addr;
344 unsigned long error_addr;
345 unsigned long feature_addr;
346 unsigned long nsect_addr;
347 unsigned long lbal_addr;
348 unsigned long lbam_addr;
349 unsigned long lbah_addr;
350 unsigned long device_addr;
351 unsigned long status_addr;
352 unsigned long command_addr;
353 unsigned long altstatus_addr;
354 unsigned long ctl_addr;
355 unsigned long bmdma_addr;
356 unsigned long scr_addr;
357 };
358
359 struct ata_probe_ent {
360 struct list_head node;
361 struct device *dev;
362 const struct ata_port_operations *port_ops;
363 struct scsi_host_template *sht;
364 struct ata_ioports port[ATA_MAX_PORTS];
365 unsigned int n_ports;
366 unsigned int dummy_port_mask;
367 unsigned int pio_mask;
368 unsigned int mwdma_mask;
369 unsigned int udma_mask;
370 unsigned long irq;
371 unsigned long irq2;
372 unsigned int irq_flags;
373 unsigned long port_flags;
374 unsigned long _host_flags;
375 void __iomem *mmio_base;
376 void *private_data;
377
378 /* port_info for the secondary port. Together with irq2, it's
379 * used to implement non-uniform secondary port. Currently,
380 * the only user is ata_piix combined mode. This workaround
381 * will be removed together with ata_probe_ent when init model
382 * is updated.
383 */
384 const struct ata_port_info *pinfo2;
385 };
386
387 struct ata_host {
388 spinlock_t lock;
389 struct device *dev;
390 unsigned long irq;
391 unsigned long irq2;
392 void __iomem *mmio_base;
393 unsigned int n_ports;
394 void *private_data;
395 const struct ata_port_operations *ops;
396 unsigned long flags;
397 int simplex_claimed; /* Keep seperate in case we
398 ever need to do this locked */
399 struct ata_port *ports[0];
400 };
401
402 struct ata_queued_cmd {
403 struct ata_port *ap;
404 struct ata_device *dev;
405
406 struct scsi_cmnd *scsicmd;
407 void (*scsidone)(struct scsi_cmnd *);
408
409 struct ata_taskfile tf;
410 u8 cdb[ATAPI_CDB_LEN];
411
412 unsigned long flags; /* ATA_QCFLAG_xxx */
413 unsigned int tag;
414 unsigned int n_elem;
415 unsigned int orig_n_elem;
416
417 int dma_dir;
418
419 unsigned int pad_len;
420
421 unsigned int nsect;
422 unsigned int cursect;
423
424 unsigned int nbytes;
425 unsigned int curbytes;
426
427 unsigned int cursg;
428 unsigned int cursg_ofs;
429
430 struct scatterlist sgent;
431 struct scatterlist pad_sgent;
432 void *buf_virt;
433
434 /* DO NOT iterate over __sg manually, use ata_for_each_sg() */
435 struct scatterlist *__sg;
436
437 unsigned int err_mask;
438 struct ata_taskfile result_tf;
439 ata_qc_cb_t complete_fn;
440
441 void *private_data;
442 };
443
444 struct ata_port_stats {
445 unsigned long unhandled_irq;
446 unsigned long idle_irq;
447 unsigned long rw_reqbuf;
448 };
449
450 struct ata_ering_entry {
451 int is_io;
452 unsigned int err_mask;
453 u64 timestamp;
454 };
455
456 struct ata_ering {
457 int cursor;
458 struct ata_ering_entry ring[ATA_ERING_SIZE];
459 };
460
461 struct ata_device {
462 struct ata_port *ap;
463 unsigned int devno; /* 0 or 1 */
464 unsigned long flags; /* ATA_DFLAG_xxx */
465 struct scsi_device *sdev; /* attached SCSI device */
466 /* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */
467 u64 n_sectors; /* size of device, if ATA */
468 unsigned int class; /* ATA_DEV_xxx */
469 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
470 u8 pio_mode;
471 u8 dma_mode;
472 u8 xfer_mode;
473 unsigned int xfer_shift; /* ATA_SHIFT_xxx */
474
475 unsigned int multi_count; /* sectors count for
476 READ/WRITE MULTIPLE */
477 unsigned int max_sectors; /* per-device max sectors */
478 unsigned int cdb_len;
479
480 /* per-dev xfer mask */
481 unsigned int pio_mask;
482 unsigned int mwdma_mask;
483 unsigned int udma_mask;
484
485 /* for CHS addressing */
486 u16 cylinders; /* Number of cylinders */
487 u16 heads; /* Number of heads */
488 u16 sectors; /* Number of sectors per track */
489
490 /* error history */
491 struct ata_ering ering;
492 unsigned int horkage; /* List of broken features */
493 };
494
495 /* Offset into struct ata_device. Fields above it are maintained
496 * acress device init. Fields below are zeroed.
497 */
498 #define ATA_DEVICE_CLEAR_OFFSET offsetof(struct ata_device, n_sectors)
499
500 struct ata_eh_info {
501 struct ata_device *dev; /* offending device */
502 u32 serror; /* SError from LLDD */
503 unsigned int err_mask; /* port-wide err_mask */
504 unsigned int action; /* ATA_EH_* action mask */
505 unsigned int dev_action[ATA_MAX_DEVICES]; /* dev EH action */
506 unsigned int flags; /* ATA_EHI_* flags */
507
508 unsigned long hotplug_timestamp;
509 unsigned int probe_mask;
510
511 char desc[ATA_EH_DESC_LEN];
512 int desc_len;
513 };
514
515 struct ata_eh_context {
516 struct ata_eh_info i;
517 int tries[ATA_MAX_DEVICES];
518 unsigned int classes[ATA_MAX_DEVICES];
519 unsigned int did_probe_mask;
520 };
521
522 struct ata_port {
523 struct Scsi_Host *scsi_host; /* our co-allocated scsi host */
524 const struct ata_port_operations *ops;
525 spinlock_t *lock;
526 unsigned long flags; /* ATA_FLAG_xxx */
527 unsigned int pflags; /* ATA_PFLAG_xxx */
528 unsigned int id; /* unique id req'd by scsi midlyr */
529 unsigned int port_no; /* unique port #; from zero */
530
531 struct ata_prd *prd; /* our SG list */
532 dma_addr_t prd_dma; /* and its DMA mapping */
533
534 void *pad; /* array of DMA pad buffers */
535 dma_addr_t pad_dma;
536
537 struct ata_ioports ioaddr; /* ATA cmd/ctl/dma register blocks */
538
539 u8 ctl; /* cache of ATA control register */
540 u8 last_ctl; /* Cache last written value */
541 unsigned int pio_mask;
542 unsigned int mwdma_mask;
543 unsigned int udma_mask;
544 unsigned int cbl; /* cable type; ATA_CBL_xxx */
545 unsigned int hw_sata_spd_limit;
546 unsigned int sata_spd_limit; /* SATA PHY speed limit */
547
548 /* record runtime error info, protected by host lock */
549 struct ata_eh_info eh_info;
550 /* EH context owned by EH */
551 struct ata_eh_context eh_context;
552
553 struct ata_device device[ATA_MAX_DEVICES];
554
555 struct ata_queued_cmd qcmd[ATA_MAX_QUEUE];
556 unsigned long qc_allocated;
557 unsigned int qc_active;
558
559 unsigned int active_tag;
560 u32 sactive;
561
562 struct ata_port_stats stats;
563 struct ata_host *host;
564 struct device *dev;
565
566 struct work_struct port_task;
567 struct work_struct hotplug_task;
568 struct work_struct scsi_rescan_task;
569
570 unsigned int hsm_task_state;
571
572 u32 msg_enable;
573 struct list_head eh_done_q;
574 wait_queue_head_t eh_wait_q;
575
576 pm_message_t pm_mesg;
577 int *pm_result;
578
579 void *private_data;
580
581 u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */
582 };
583
584 struct ata_port_operations {
585 void (*port_disable) (struct ata_port *);
586
587 void (*dev_config) (struct ata_port *, struct ata_device *);
588
589 void (*set_piomode) (struct ata_port *, struct ata_device *);
590 void (*set_dmamode) (struct ata_port *, struct ata_device *);
591 unsigned long (*mode_filter) (const struct ata_port *, struct ata_device *, unsigned long);
592
593 void (*tf_load) (struct ata_port *ap, const struct ata_taskfile *tf);
594 void (*tf_read) (struct ata_port *ap, struct ata_taskfile *tf);
595
596 void (*exec_command)(struct ata_port *ap, const struct ata_taskfile *tf);
597 u8 (*check_status)(struct ata_port *ap);
598 u8 (*check_altstatus)(struct ata_port *ap);
599 void (*dev_select)(struct ata_port *ap, unsigned int device);
600
601 void (*phy_reset) (struct ata_port *ap); /* obsolete */
602 void (*set_mode) (struct ata_port *ap);
603
604 void (*post_set_mode) (struct ata_port *ap);
605
606 int (*check_atapi_dma) (struct ata_queued_cmd *qc);
607
608 void (*bmdma_setup) (struct ata_queued_cmd *qc);
609 void (*bmdma_start) (struct ata_queued_cmd *qc);
610
611 void (*data_xfer) (struct ata_device *, unsigned char *, unsigned int, int);
612
613 void (*qc_prep) (struct ata_queued_cmd *qc);
614 unsigned int (*qc_issue) (struct ata_queued_cmd *qc);
615
616 /* Error handlers. ->error_handler overrides ->eng_timeout and
617 * indicates that new-style EH is in place.
618 */
619 void (*eng_timeout) (struct ata_port *ap); /* obsolete */
620
621 void (*freeze) (struct ata_port *ap);
622 void (*thaw) (struct ata_port *ap);
623 void (*error_handler) (struct ata_port *ap);
624 void (*post_internal_cmd) (struct ata_queued_cmd *qc);
625
626 irqreturn_t (*irq_handler)(int, void *, struct pt_regs *);
627 void (*irq_clear) (struct ata_port *);
628
629 u32 (*scr_read) (struct ata_port *ap, unsigned int sc_reg);
630 void (*scr_write) (struct ata_port *ap, unsigned int sc_reg,
631 u32 val);
632
633 int (*port_suspend) (struct ata_port *ap, pm_message_t mesg);
634 int (*port_resume) (struct ata_port *ap);
635
636 int (*port_start) (struct ata_port *ap);
637 void (*port_stop) (struct ata_port *ap);
638
639 void (*host_stop) (struct ata_host *host);
640
641 void (*bmdma_stop) (struct ata_queued_cmd *qc);
642 u8 (*bmdma_status) (struct ata_port *ap);
643 };
644
645 struct ata_port_info {
646 struct scsi_host_template *sht;
647 unsigned long flags;
648 unsigned long pio_mask;
649 unsigned long mwdma_mask;
650 unsigned long udma_mask;
651 const struct ata_port_operations *port_ops;
652 void *private_data;
653 };
654
655 struct ata_timing {
656 unsigned short mode; /* ATA mode */
657 unsigned short setup; /* t1 */
658 unsigned short act8b; /* t2 for 8-bit I/O */
659 unsigned short rec8b; /* t2i for 8-bit I/O */
660 unsigned short cyc8b; /* t0 for 8-bit I/O */
661 unsigned short active; /* t2 or tD */
662 unsigned short recover; /* t2i or tK */
663 unsigned short cycle; /* t0 */
664 unsigned short udma; /* t2CYCTYP/2 */
665 };
666
667 #define FIT(v,vmin,vmax) max_t(short,min_t(short,v,vmax),vmin)
668
669 extern const unsigned long sata_deb_timing_normal[];
670 extern const unsigned long sata_deb_timing_hotplug[];
671 extern const unsigned long sata_deb_timing_long[];
672
673 extern const struct ata_port_operations ata_dummy_port_ops;
674
675 static inline const unsigned long *
676 sata_ehc_deb_timing(struct ata_eh_context *ehc)
677 {
678 if (ehc->i.flags & ATA_EHI_HOTPLUGGED)
679 return sata_deb_timing_hotplug;
680 else
681 return sata_deb_timing_normal;
682 }
683
684 static inline int ata_port_is_dummy(struct ata_port *ap)
685 {
686 return ap->ops == &ata_dummy_port_ops;
687 }
688
689 extern void ata_port_probe(struct ata_port *);
690 extern void __sata_phy_reset(struct ata_port *ap);
691 extern void sata_phy_reset(struct ata_port *ap);
692 extern void ata_bus_reset(struct ata_port *ap);
693 extern int sata_set_spd(struct ata_port *ap);
694 extern int sata_phy_debounce(struct ata_port *ap, const unsigned long *param);
695 extern int sata_phy_resume(struct ata_port *ap, const unsigned long *param);
696 extern int ata_std_prereset(struct ata_port *ap);
697 extern int ata_std_softreset(struct ata_port *ap, unsigned int *classes);
698 extern int sata_std_hardreset(struct ata_port *ap, unsigned int *class);
699 extern void ata_std_postreset(struct ata_port *ap, unsigned int *classes);
700 extern int ata_dev_revalidate(struct ata_device *dev, int post_reset);
701 extern void ata_port_disable(struct ata_port *);
702 extern void ata_std_ports(struct ata_ioports *ioaddr);
703 #ifdef CONFIG_PCI
704 extern int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info,
705 unsigned int n_ports);
706 extern void ata_pci_remove_one (struct pci_dev *pdev);
707 extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg);
708 extern void ata_pci_device_do_resume(struct pci_dev *pdev);
709 extern int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
710 extern int ata_pci_device_resume(struct pci_dev *pdev);
711 extern int ata_pci_clear_simplex(struct pci_dev *pdev);
712 #endif /* CONFIG_PCI */
713 extern int ata_device_add(const struct ata_probe_ent *ent);
714 extern void ata_port_detach(struct ata_port *ap);
715 extern void ata_host_init(struct ata_host *, struct device *,
716 unsigned long, const struct ata_port_operations *);
717 extern void ata_host_remove(struct ata_host *host);
718 extern int ata_scsi_detect(struct scsi_host_template *sht);
719 extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
720 extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *));
721 extern int ata_scsi_release(struct Scsi_Host *host);
722 extern void ata_sas_port_destroy(struct ata_port *);
723 extern struct ata_port *ata_sas_port_alloc(struct ata_host *,
724 struct ata_port_info *, struct Scsi_Host *);
725 extern int ata_sas_port_init(struct ata_port *);
726 extern int ata_sas_port_start(struct ata_port *ap);
727 extern void ata_sas_port_stop(struct ata_port *ap);
728 extern int ata_sas_slave_configure(struct scsi_device *, struct ata_port *);
729 extern int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
730 struct ata_port *ap);
731 extern unsigned int ata_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc);
732 extern int sata_scr_valid(struct ata_port *ap);
733 extern int sata_scr_read(struct ata_port *ap, int reg, u32 *val);
734 extern int sata_scr_write(struct ata_port *ap, int reg, u32 val);
735 extern int sata_scr_write_flush(struct ata_port *ap, int reg, u32 val);
736 extern int ata_port_online(struct ata_port *ap);
737 extern int ata_port_offline(struct ata_port *ap);
738 extern int ata_scsi_device_resume(struct scsi_device *);
739 extern int ata_scsi_device_suspend(struct scsi_device *, pm_message_t mesg);
740 extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg);
741 extern void ata_host_resume(struct ata_host *host);
742 extern int ata_ratelimit(void);
743 extern unsigned int ata_busy_sleep(struct ata_port *ap,
744 unsigned long timeout_pat,
745 unsigned long timeout);
746 extern void ata_port_queue_task(struct ata_port *ap, void (*fn)(void *),
747 void *data, unsigned long delay);
748 extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
749 unsigned long interval_msec,
750 unsigned long timeout_msec);
751
752 /*
753 * Default driver ops implementations
754 */
755 extern void ata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf);
756 extern void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
757 extern void ata_tf_to_fis(const struct ata_taskfile *tf, u8 *fis, u8 pmp);
758 extern void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf);
759 extern void ata_noop_dev_select (struct ata_port *ap, unsigned int device);
760 extern void ata_std_dev_select (struct ata_port *ap, unsigned int device);
761 extern u8 ata_check_status(struct ata_port *ap);
762 extern u8 ata_altstatus(struct ata_port *ap);
763 extern void ata_exec_command(struct ata_port *ap, const struct ata_taskfile *tf);
764 extern int ata_port_start (struct ata_port *ap);
765 extern void ata_port_stop (struct ata_port *ap);
766 extern void ata_host_stop (struct ata_host *host);
767 extern irqreturn_t ata_interrupt (int irq, void *dev_instance, struct pt_regs *regs);
768 extern void ata_mmio_data_xfer(struct ata_device *adev, unsigned char *buf,
769 unsigned int buflen, int write_data);
770 extern void ata_pio_data_xfer(struct ata_device *adev, unsigned char *buf,
771 unsigned int buflen, int write_data);
772 extern void ata_pio_data_xfer_noirq(struct ata_device *adev, unsigned char *buf,
773 unsigned int buflen, int write_data);
774 extern void ata_qc_prep(struct ata_queued_cmd *qc);
775 extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);
776 extern unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc);
777 extern void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf,
778 unsigned int buflen);
779 extern void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
780 unsigned int n_elem);
781 extern unsigned int ata_dev_classify(const struct ata_taskfile *tf);
782 extern void ata_id_string(const u16 *id, unsigned char *s,
783 unsigned int ofs, unsigned int len);
784 extern void ata_id_c_string(const u16 *id, unsigned char *s,
785 unsigned int ofs, unsigned int len);
786 extern void ata_bmdma_setup (struct ata_queued_cmd *qc);
787 extern void ata_bmdma_start (struct ata_queued_cmd *qc);
788 extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
789 extern u8 ata_bmdma_status(struct ata_port *ap);
790 extern void ata_bmdma_irq_clear(struct ata_port *ap);
791 extern void ata_bmdma_freeze(struct ata_port *ap);
792 extern void ata_bmdma_thaw(struct ata_port *ap);
793 extern void ata_bmdma_drive_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
794 ata_reset_fn_t softreset,
795 ata_reset_fn_t hardreset,
796 ata_postreset_fn_t postreset);
797 extern void ata_bmdma_error_handler(struct ata_port *ap);
798 extern void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc);
799 extern int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
800 u8 status, int in_wq);
801 extern void ata_qc_complete(struct ata_queued_cmd *qc);
802 extern int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active,
803 void (*finish_qc)(struct ata_queued_cmd *));
804 extern void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
805 void (*done)(struct scsi_cmnd *));
806 extern int ata_std_bios_param(struct scsi_device *sdev,
807 struct block_device *bdev,
808 sector_t capacity, int geom[]);
809 extern int ata_scsi_slave_config(struct scsi_device *sdev);
810 extern void ata_scsi_slave_destroy(struct scsi_device *sdev);
811 extern int ata_scsi_change_queue_depth(struct scsi_device *sdev,
812 int queue_depth);
813 extern struct ata_device *ata_dev_pair(struct ata_device *adev);
814
815 /*
816 * Timing helpers
817 */
818
819 extern unsigned int ata_pio_need_iordy(const struct ata_device *);
820 extern int ata_timing_compute(struct ata_device *, unsigned short,
821 struct ata_timing *, int, int);
822 extern void ata_timing_merge(const struct ata_timing *,
823 const struct ata_timing *, struct ata_timing *,
824 unsigned int);
825
826 enum {
827 ATA_TIMING_SETUP = (1 << 0),
828 ATA_TIMING_ACT8B = (1 << 1),
829 ATA_TIMING_REC8B = (1 << 2),
830 ATA_TIMING_CYC8B = (1 << 3),
831 ATA_TIMING_8BIT = ATA_TIMING_ACT8B | ATA_TIMING_REC8B |
832 ATA_TIMING_CYC8B,
833 ATA_TIMING_ACTIVE = (1 << 4),
834 ATA_TIMING_RECOVER = (1 << 5),
835 ATA_TIMING_CYCLE = (1 << 6),
836 ATA_TIMING_UDMA = (1 << 7),
837 ATA_TIMING_ALL = ATA_TIMING_SETUP | ATA_TIMING_ACT8B |
838 ATA_TIMING_REC8B | ATA_TIMING_CYC8B |
839 ATA_TIMING_ACTIVE | ATA_TIMING_RECOVER |
840 ATA_TIMING_CYCLE | ATA_TIMING_UDMA,
841 };
842
843
844 #ifdef CONFIG_PCI
845 struct pci_bits {
846 unsigned int reg; /* PCI config register to read */
847 unsigned int width; /* 1 (8 bit), 2 (16 bit), 4 (32 bit) */
848 unsigned long mask;
849 unsigned long val;
850 };
851
852 extern void ata_pci_host_stop (struct ata_host *host);
853 extern struct ata_probe_ent *
854 ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port, int portmask);
855 extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
856 extern unsigned long ata_pci_default_filter(const struct ata_port *, struct ata_device *, unsigned long);
857 #endif /* CONFIG_PCI */
858
859 /*
860 * EH
861 */
862 extern void ata_eng_timeout(struct ata_port *ap);
863
864 extern void ata_port_schedule_eh(struct ata_port *ap);
865 extern int ata_port_abort(struct ata_port *ap);
866 extern int ata_port_freeze(struct ata_port *ap);
867
868 extern void ata_eh_freeze_port(struct ata_port *ap);
869 extern void ata_eh_thaw_port(struct ata_port *ap);
870
871 extern void ata_eh_qc_complete(struct ata_queued_cmd *qc);
872 extern void ata_eh_qc_retry(struct ata_queued_cmd *qc);
873
874 extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset,
875 ata_reset_fn_t softreset, ata_reset_fn_t hardreset,
876 ata_postreset_fn_t postreset);
877
878 /*
879 * printk helpers
880 */
881 #define ata_port_printk(ap, lv, fmt, args...) \
882 printk(lv"ata%u: "fmt, (ap)->id , ##args)
883
884 #define ata_dev_printk(dev, lv, fmt, args...) \
885 printk(lv"ata%u.%02u: "fmt, (dev)->ap->id, (dev)->devno , ##args)
886
887 /*
888 * ata_eh_info helpers
889 */
890 #define ata_ehi_push_desc(ehi, fmt, args...) do { \
891 (ehi)->desc_len += scnprintf((ehi)->desc + (ehi)->desc_len, \
892 ATA_EH_DESC_LEN - (ehi)->desc_len, \
893 fmt , ##args); \
894 } while (0)
895
896 #define ata_ehi_clear_desc(ehi) do { \
897 (ehi)->desc[0] = '\0'; \
898 (ehi)->desc_len = 0; \
899 } while (0)
900
901 static inline void __ata_ehi_hotplugged(struct ata_eh_info *ehi)
902 {
903 if (ehi->flags & ATA_EHI_HOTPLUGGED)
904 return;
905
906 ehi->flags |= ATA_EHI_HOTPLUGGED | ATA_EHI_RESUME_LINK;
907 ehi->hotplug_timestamp = jiffies;
908
909 ehi->action |= ATA_EH_SOFTRESET;
910 ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
911 }
912
913 static inline void ata_ehi_hotplugged(struct ata_eh_info *ehi)
914 {
915 __ata_ehi_hotplugged(ehi);
916 ehi->err_mask |= AC_ERR_ATA_BUS;
917 }
918
919 /*
920 * qc helpers
921 */
922 static inline int
923 ata_sg_is_last(struct scatterlist *sg, struct ata_queued_cmd *qc)
924 {
925 if (sg == &qc->pad_sgent)
926 return 1;
927 if (qc->pad_len)
928 return 0;
929 if (((sg - qc->__sg) + 1) == qc->n_elem)
930 return 1;
931 return 0;
932 }
933
934 static inline struct scatterlist *
935 ata_qc_first_sg(struct ata_queued_cmd *qc)
936 {
937 if (qc->n_elem)
938 return qc->__sg;
939 if (qc->pad_len)
940 return &qc->pad_sgent;
941 return NULL;
942 }
943
944 static inline struct scatterlist *
945 ata_qc_next_sg(struct scatterlist *sg, struct ata_queued_cmd *qc)
946 {
947 if (sg == &qc->pad_sgent)
948 return NULL;
949 if (++sg - qc->__sg < qc->n_elem)
950 return sg;
951 if (qc->pad_len)
952 return &qc->pad_sgent;
953 return NULL;
954 }
955
956 #define ata_for_each_sg(sg, qc) \
957 for (sg = ata_qc_first_sg(qc); sg; sg = ata_qc_next_sg(sg, qc))
958
959 static inline unsigned int ata_tag_valid(unsigned int tag)
960 {
961 return (tag < ATA_MAX_QUEUE) ? 1 : 0;
962 }
963
964 static inline unsigned int ata_tag_internal(unsigned int tag)
965 {
966 return tag == ATA_MAX_QUEUE - 1;
967 }
968
969 /*
970 * device helpers
971 */
972 static inline unsigned int ata_class_enabled(unsigned int class)
973 {
974 return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI;
975 }
976
977 static inline unsigned int ata_class_disabled(unsigned int class)
978 {
979 return class == ATA_DEV_ATA_UNSUP || class == ATA_DEV_ATAPI_UNSUP;
980 }
981
982 static inline unsigned int ata_class_absent(unsigned int class)
983 {
984 return !ata_class_enabled(class) && !ata_class_disabled(class);
985 }
986
987 static inline unsigned int ata_dev_enabled(const struct ata_device *dev)
988 {
989 return ata_class_enabled(dev->class);
990 }
991
992 static inline unsigned int ata_dev_disabled(const struct ata_device *dev)
993 {
994 return ata_class_disabled(dev->class);
995 }
996
997 static inline unsigned int ata_dev_absent(const struct ata_device *dev)
998 {
999 return ata_class_absent(dev->class);
1000 }
1001
1002 static inline unsigned int ata_dev_ready(const struct ata_device *dev)
1003 {
1004 return ata_dev_enabled(dev) && !(dev->flags & ATA_DFLAG_SUSPENDED);
1005 }
1006
1007 /*
1008 * port helpers
1009 */
1010 static inline int ata_port_max_devices(const struct ata_port *ap)
1011 {
1012 if (ap->flags & ATA_FLAG_SLAVE_POSS)
1013 return 2;
1014 return 1;
1015 }
1016
1017
1018 static inline u8 ata_chk_status(struct ata_port *ap)
1019 {
1020 return ap->ops->check_status(ap);
1021 }
1022
1023
1024 /**
1025 * ata_pause - Flush writes and pause 400 nanoseconds.
1026 * @ap: Port to wait for.
1027 *
1028 * LOCKING:
1029 * Inherited from caller.
1030 */
1031
1032 static inline void ata_pause(struct ata_port *ap)
1033 {
1034 ata_altstatus(ap);
1035 ndelay(400);
1036 }
1037
1038
1039 /**
1040 * ata_busy_wait - Wait for a port status register
1041 * @ap: Port to wait for.
1042 *
1043 * Waits up to max*10 microseconds for the selected bits in the port's
1044 * status register to be cleared.
1045 * Returns final value of status register.
1046 *
1047 * LOCKING:
1048 * Inherited from caller.
1049 */
1050
1051 static inline u8 ata_busy_wait(struct ata_port *ap, unsigned int bits,
1052 unsigned int max)
1053 {
1054 u8 status;
1055
1056 do {
1057 udelay(10);
1058 status = ata_chk_status(ap);
1059 max--;
1060 } while ((status & bits) && (max > 0));
1061
1062 return status;
1063 }
1064
1065
1066 /**
1067 * ata_wait_idle - Wait for a port to be idle.
1068 * @ap: Port to wait for.
1069 *
1070 * Waits up to 10ms for port's BUSY and DRQ signals to clear.
1071 * Returns final value of status register.
1072 *
1073 * LOCKING:
1074 * Inherited from caller.
1075 */
1076
1077 static inline u8 ata_wait_idle(struct ata_port *ap)
1078 {
1079 u8 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
1080
1081 if (status & (ATA_BUSY | ATA_DRQ)) {
1082 unsigned long l = ap->ioaddr.status_addr;
1083 if (ata_msg_warn(ap))
1084 printk(KERN_WARNING "ATA: abnormal status 0x%X on port 0x%lX\n",
1085 status, l);
1086 }
1087
1088 return status;
1089 }
1090
1091 static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
1092 {
1093 qc->tf.ctl |= ATA_NIEN;
1094 }
1095
1096 static inline struct ata_queued_cmd *__ata_qc_from_tag(struct ata_port *ap,
1097 unsigned int tag)
1098 {
1099 if (likely(ata_tag_valid(tag)))
1100 return &ap->qcmd[tag];
1101 return NULL;
1102 }
1103
1104 static inline struct ata_queued_cmd *ata_qc_from_tag(struct ata_port *ap,
1105 unsigned int tag)
1106 {
1107 struct ata_queued_cmd *qc = __ata_qc_from_tag(ap, tag);
1108
1109 if (unlikely(!qc) || !ap->ops->error_handler)
1110 return qc;
1111
1112 if ((qc->flags & (ATA_QCFLAG_ACTIVE |
1113 ATA_QCFLAG_FAILED)) == ATA_QCFLAG_ACTIVE)
1114 return qc;
1115
1116 return NULL;
1117 }
1118
1119 static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
1120 {
1121 memset(tf, 0, sizeof(*tf));
1122
1123 tf->ctl = dev->ap->ctl;
1124 if (dev->devno == 0)
1125 tf->device = ATA_DEVICE_OBS;
1126 else
1127 tf->device = ATA_DEVICE_OBS | ATA_DEV1;
1128 }
1129
1130 static inline void ata_qc_reinit(struct ata_queued_cmd *qc)
1131 {
1132 qc->__sg = NULL;
1133 qc->flags = 0;
1134 qc->cursect = qc->cursg = qc->cursg_ofs = 0;
1135 qc->nsect = 0;
1136 qc->nbytes = qc->curbytes = 0;
1137 qc->err_mask = 0;
1138
1139 ata_tf_init(qc->dev, &qc->tf);
1140
1141 /* init result_tf such that it indicates normal completion */
1142 qc->result_tf.command = ATA_DRDY;
1143 qc->result_tf.feature = 0;
1144 }
1145
1146 /**
1147 * ata_irq_on - Enable interrupts on a port.
1148 * @ap: Port on which interrupts are enabled.
1149 *
1150 * Enable interrupts on a legacy IDE device using MMIO or PIO,
1151 * wait for idle, clear any pending interrupts.
1152 *
1153 * LOCKING:
1154 * Inherited from caller.
1155 */
1156
1157 static inline u8 ata_irq_on(struct ata_port *ap)
1158 {
1159 struct ata_ioports *ioaddr = &ap->ioaddr;
1160 u8 tmp;
1161
1162 ap->ctl &= ~ATA_NIEN;
1163 ap->last_ctl = ap->ctl;
1164
1165 if (ap->flags & ATA_FLAG_MMIO)
1166 writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr);
1167 else
1168 outb(ap->ctl, ioaddr->ctl_addr);
1169 tmp = ata_wait_idle(ap);
1170
1171 ap->ops->irq_clear(ap);
1172
1173 return tmp;
1174 }
1175
1176
1177 /**
1178 * ata_irq_ack - Acknowledge a device interrupt.
1179 * @ap: Port on which interrupts are enabled.
1180 *
1181 * Wait up to 10 ms for legacy IDE device to become idle (BUSY
1182 * or BUSY+DRQ clear). Obtain dma status and port status from
1183 * device. Clear the interrupt. Return port status.
1184 *
1185 * LOCKING:
1186 */
1187
1188 static inline u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq)
1189 {
1190 unsigned int bits = chk_drq ? ATA_BUSY | ATA_DRQ : ATA_BUSY;
1191 u8 host_stat, post_stat, status;
1192
1193 status = ata_busy_wait(ap, bits, 1000);
1194 if (status & bits)
1195 if (ata_msg_err(ap))
1196 printk(KERN_ERR "abnormal status 0x%X\n", status);
1197
1198 /* get controller status; clear intr, err bits */
1199 if (ap->flags & ATA_FLAG_MMIO) {
1200 void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr;
1201 host_stat = readb(mmio + ATA_DMA_STATUS);
1202 writeb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR,
1203 mmio + ATA_DMA_STATUS);
1204
1205 post_stat = readb(mmio + ATA_DMA_STATUS);
1206 } else {
1207 host_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
1208 outb(host_stat | ATA_DMA_INTR | ATA_DMA_ERR,
1209 ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
1210
1211 post_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
1212 }
1213
1214 if (ata_msg_intr(ap))
1215 printk(KERN_INFO "%s: irq ack: host_stat 0x%X, new host_stat 0x%X, drv_stat 0x%X\n",
1216 __FUNCTION__,
1217 host_stat, post_stat, status);
1218
1219 return status;
1220 }
1221
1222 static inline int ata_try_flush_cache(const struct ata_device *dev)
1223 {
1224 return ata_id_wcache_enabled(dev->id) ||
1225 ata_id_has_flush(dev->id) ||
1226 ata_id_has_flush_ext(dev->id);
1227 }
1228
1229 static inline unsigned int ac_err_mask(u8 status)
1230 {
1231 if (status & (ATA_BUSY | ATA_DRQ))
1232 return AC_ERR_HSM;
1233 if (status & (ATA_ERR | ATA_DF))
1234 return AC_ERR_DEV;
1235 return 0;
1236 }
1237
1238 static inline unsigned int __ac_err_mask(u8 status)
1239 {
1240 unsigned int mask = ac_err_mask(status);
1241 if (mask == 0)
1242 return AC_ERR_OTHER;
1243 return mask;
1244 }
1245
1246 static inline int ata_pad_alloc(struct ata_port *ap, struct device *dev)
1247 {
1248 ap->pad_dma = 0;
1249 ap->pad = dma_alloc_coherent(dev, ATA_DMA_PAD_BUF_SZ,
1250 &ap->pad_dma, GFP_KERNEL);
1251 return (ap->pad == NULL) ? -ENOMEM : 0;
1252 }
1253
1254 static inline void ata_pad_free(struct ata_port *ap, struct device *dev)
1255 {
1256 dma_free_coherent(dev, ATA_DMA_PAD_BUF_SZ, ap->pad, ap->pad_dma);
1257 }
1258
1259 static inline struct ata_port *ata_shost_to_port(struct Scsi_Host *host)
1260 {
1261 return (struct ata_port *) &host->hostdata[0];
1262 }
1263
1264 #endif /* __LINUX_LIBATA_H__ */
kernel source for telekom puls (alcatel/mediatek)