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ide-disk: use struct ide_taskfile in __ide_do_rw_disk()
[deliverable/linux.git] / include / linux / ide.h
CommitLineData
1da177e4
LT		 1#ifndef _IDE_H
2#define _IDE_H
3/*
4 * linux/include/linux/ide.h
5 *
6 * Copyright (C) 1994-2002 Linus Torvalds & authors
7 */
8
1da177e4
LT		 9#include <linux/init.h>
10#include <linux/ioport.h>
11#include <linux/hdreg.h>
12#include <linux/hdsmart.h>
13#include <linux/blkdev.h>
14#include <linux/proc_fs.h>
15#include <linux/interrupt.h>
16#include <linux/bitops.h>
17#include <linux/bio.h>
18#include <linux/device.h>
19#include <linux/pci.h>
f36d4024 20#include <linux/completion.h>
e3a59b4d
HR		 21#ifdef CONFIG_BLK_DEV_IDEACPI
22#include <acpi/acpi.h>
23#endif
1da177e4
LT		 24#include <asm/byteorder.h>
25#include <asm/system.h>
26#include <asm/io.h>
27#include <asm/semaphore.h>
f9383c42 28#include <asm/mutex.h>
1da177e4 29
1da177e4
LT		 30/******************************************************************************
31 * IDE driver configuration options (play with these as desired):
32 *
33 * REALLY_SLOW_IO can be defined in ide.c and ide-cd.c, if necessary
34 */
35#define INITIAL_MULT_COUNT 0 /* off=0; on=2,4,8,16,32, etc.. */
36
37#ifndef SUPPORT_SLOW_DATA_PORTS /* 1 to support slow data ports */
38#define SUPPORT_SLOW_DATA_PORTS 1 /* 0 to reduce kernel size */
39#endif
40#ifndef SUPPORT_VLB_SYNC /* 1 to support weird 32-bit chips */
41#define SUPPORT_VLB_SYNC 1 /* 0 to reduce kernel size */
42#endif
43#ifndef OK_TO_RESET_CONTROLLER /* 1 needed for good error recovery */
44#define OK_TO_RESET_CONTROLLER 1 /* 0 for use with AH2372A/B interface */
45#endif
46
47#ifndef DISABLE_IRQ_NOSYNC
48#define DISABLE_IRQ_NOSYNC 0
49#endif
50
51/*
52 * Used to indicate "no IRQ", should be a value that cannot be an IRQ
53 * number.
54 */
55
56#define IDE_NO_IRQ (-1)
57
58/*
59 * "No user-serviceable parts" beyond this point :)
60 *****************************************************************************/
61
62typedef unsigned char byte; /* used everywhere */
63
64/*
65 * Probably not wise to fiddle with these
66 */
67#define ERROR_MAX 8 /* Max read/write errors per sector */
68#define ERROR_RESET 3 /* Reset controller every 4th retry */
69#define ERROR_RECAL 1 /* Recalibrate every 2nd retry */
70
71/*
72 * Tune flags
73 */
74#define IDE_TUNE_NOAUTO 2
75#define IDE_TUNE_AUTO 1
76#define IDE_TUNE_DEFAULT 0
77
78/*
79 * state flags
80 */
81
82#define DMA_PIO_RETRY 1 /* retrying in PIO */
83
84#define HWIF(drive) ((ide_hwif_t *)((drive)->hwif))
85#define HWGROUP(drive) ((ide_hwgroup_t *)(HWIF(drive)->hwgroup))
86
87/*
88 * Definitions for accessing IDE controller registers
89 */
90#define IDE_NR_PORTS (10)
91
92#define IDE_DATA_OFFSET (0)
93#define IDE_ERROR_OFFSET (1)
94#define IDE_NSECTOR_OFFSET (2)
95#define IDE_SECTOR_OFFSET (3)
96#define IDE_LCYL_OFFSET (4)
97#define IDE_HCYL_OFFSET (5)
98#define IDE_SELECT_OFFSET (6)
99#define IDE_STATUS_OFFSET (7)
100#define IDE_CONTROL_OFFSET (8)
101#define IDE_IRQ_OFFSET (9)
102
103#define IDE_FEATURE_OFFSET IDE_ERROR_OFFSET
104#define IDE_COMMAND_OFFSET IDE_STATUS_OFFSET
105
1da177e4
LT		 106#define IDE_DATA_REG (HWIF(drive)->io_ports[IDE_DATA_OFFSET])
107#define IDE_ERROR_REG (HWIF(drive)->io_ports[IDE_ERROR_OFFSET])
108#define IDE_NSECTOR_REG (HWIF(drive)->io_ports[IDE_NSECTOR_OFFSET])
109#define IDE_SECTOR_REG (HWIF(drive)->io_ports[IDE_SECTOR_OFFSET])
110#define IDE_LCYL_REG (HWIF(drive)->io_ports[IDE_LCYL_OFFSET])
111#define IDE_HCYL_REG (HWIF(drive)->io_ports[IDE_HCYL_OFFSET])
112#define IDE_SELECT_REG (HWIF(drive)->io_ports[IDE_SELECT_OFFSET])
113#define IDE_STATUS_REG (HWIF(drive)->io_ports[IDE_STATUS_OFFSET])
114#define IDE_CONTROL_REG (HWIF(drive)->io_ports[IDE_CONTROL_OFFSET])
115#define IDE_IRQ_REG (HWIF(drive)->io_ports[IDE_IRQ_OFFSET])
116
117#define IDE_FEATURE_REG IDE_ERROR_REG
118#define IDE_COMMAND_REG IDE_STATUS_REG
119#define IDE_ALTSTATUS_REG IDE_CONTROL_REG
120#define IDE_IREASON_REG IDE_NSECTOR_REG
121#define IDE_BCOUNTL_REG IDE_LCYL_REG
122#define IDE_BCOUNTH_REG IDE_HCYL_REG
123
124#define OK_STAT(stat,good,bad) (((stat)&((good)|(bad)))==(good))
125#define BAD_R_STAT (BUSY_STAT | ERR_STAT)
126#define BAD_W_STAT (BAD_R_STAT | WRERR_STAT)
127#define BAD_STAT (BAD_R_STAT | DRQ_STAT)
128#define DRIVE_READY (READY_STAT | SEEK_STAT)
129#define DATA_READY (DRQ_STAT)
130
131#define BAD_CRC (ABRT_ERR | ICRC_ERR)
132
133#define SATA_NR_PORTS (3) /* 16 possible ?? */
134
135#define SATA_STATUS_OFFSET (0)
136#define SATA_STATUS_REG (HWIF(drive)->sata_scr[SATA_STATUS_OFFSET])
137#define SATA_ERROR_OFFSET (1)
138#define SATA_ERROR_REG (HWIF(drive)->sata_scr[SATA_ERROR_OFFSET])
139#define SATA_CONTROL_OFFSET (2)
140#define SATA_CONTROL_REG (HWIF(drive)->sata_scr[SATA_CONTROL_OFFSET])
141
142#define SATA_MISC_OFFSET (0)
143#define SATA_MISC_REG (HWIF(drive)->sata_misc[SATA_MISC_OFFSET])
144#define SATA_PHY_OFFSET (1)
145#define SATA_PHY_REG (HWIF(drive)->sata_misc[SATA_PHY_OFFSET])
146#define SATA_IEN_OFFSET (2)
147#define SATA_IEN_REG (HWIF(drive)->sata_misc[SATA_IEN_OFFSET])
148
149/*
150 * Our Physical Region Descriptor (PRD) table should be large enough
151 * to handle the biggest I/O request we are likely to see. Since requests
152 * can have no more than 256 sectors, and since the typical blocksize is
153 * two or more sectors, we could get by with a limit of 128 entries here for
154 * the usual worst case. Most requests seem to include some contiguous blocks,
155 * further reducing the number of table entries required.
156 *
157 * The driver reverts to PIO mode for individual requests that exceed
158 * this limit (possible with 512 byte blocksizes, eg. MSDOS f/s), so handling
159 * 100% of all crazy scenarios here is not necessary.
160 *
161 * As it turns out though, we must allocate a full 4KB page for this,
162 * so the two PRD tables (ide0 & ide1) will each get half of that,
163 * allowing each to have about 256 entries (8 bytes each) from this.
164 */
165#define PRD_BYTES 8
166#define PRD_ENTRIES 256
167
168/*
169 * Some more useful definitions
170 */
171#define PARTN_BITS 6 /* number of minor dev bits for partitions */
172#define MAX_DRIVES 2 /* per interface; 2 assumed by lots of code */
173#define SECTOR_SIZE 512
174#define SECTOR_WORDS (SECTOR_SIZE / 4) /* number of 32bit words per sector */
175#define IDE_LARGE_SEEK(b1,b2,t) (((b1) > (b2) + (t)) || ((b2) > (b1) + (t)))
176
177/*
178 * Timeouts for various operations:
179 */
180#define WAIT_DRQ (HZ/10) /* 100msec - spec allows up to 20ms */
181#define WAIT_READY (5*HZ) /* 5sec - some laptops are very slow */
182#define WAIT_PIDENTIFY (10*HZ) /* 10sec - should be less than 3ms (?), if all ATAPI CD is closed at boot */
183#define WAIT_WORSTCASE (30*HZ) /* 30sec - worst case when spinning up */
184#define WAIT_CMD (10*HZ) /* 10sec - maximum wait for an IRQ to happen */
185#define WAIT_MIN_SLEEP (2*HZ/100) /* 20msec - minimum sleep time */
186
1da177e4
LT		 187/*
188 * Check for an interrupt and acknowledge the interrupt status
189 */
190struct hwif_s;
191typedef int (ide_ack_intr_t)(struct hwif_s *);
192
1da177e4
LT		 193/*
194 * hwif_chipset_t is used to keep track of the specific hardware
195 * chipset used by each IDE interface, if known.
196 */
528a572d 197enum { ide_unknown, ide_generic, ide_pci,
1da177e4
LT		 198 ide_cmd640, ide_dtc2278, ide_ali14xx,
199 ide_qd65xx, ide_umc8672, ide_ht6560b,
200 ide_rz1000, ide_trm290,
201 ide_cmd646, ide_cy82c693, ide_4drives,
202 ide_pmac, ide_etrax100, ide_acorn,
26a940e2 203 ide_au1xxx, ide_forced
528a572d
BZ		 204};
205
206typedef u8 hwif_chipset_t;
1da177e4
LT		 207
208/*
209 * Structure to hold all information about the location of this port
210 */
211typedef struct hw_regs_s {
212 unsigned long io_ports[IDE_NR_PORTS]; /* task file registers */
213 int irq; /* our irq number */
1da177e4
LT		 214 ide_ack_intr_t *ack_intr; /* acknowledge interrupt */
215 hwif_chipset_t chipset;
4349d5cd 216 struct device *dev;
1da177e4
LT		 217} hw_regs_t;
218
baa8f3e9
BZ		 219struct hwif_s * ide_find_port(unsigned long);
220
fd9bb539
BZ		 221int ide_register_hw(hw_regs_t *, void (*)(struct hwif_s *), int,
222 struct hwif_s **);
1da177e4 223
1da177e4
LT		 224void ide_setup_ports( hw_regs_t *hw,
225 unsigned long base,
226 int *offsets,
227 unsigned long ctrl,
228 unsigned long intr,
229 ide_ack_intr_t *ack_intr,
230#if 0
231 ide_io_ops_t *iops,
232#endif
233 int irq);
234
235static inline void ide_std_init_ports(hw_regs_t *hw,
236 unsigned long io_addr,
237 unsigned long ctl_addr)
238{
239 unsigned int i;
240
241 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
242 hw->io_ports[i] = io_addr++;
243
244 hw->io_ports[IDE_CONTROL_OFFSET] = ctl_addr;
245}
246
247#include <asm/ide.h>
248
83d7dbc4
MM		 249#if !defined(MAX_HWIFS) || defined(CONFIG_EMBEDDED)
250#undef MAX_HWIFS
83ae20c8
BH		 251#define MAX_HWIFS CONFIG_IDE_MAX_HWIFS
252#endif
253
1da177e4
LT		 254/* needed on alpha, x86/x86_64, ia64, mips, ppc32 and sh */
255#ifndef IDE_ARCH_OBSOLETE_DEFAULTS
256# define ide_default_io_base(index) (0)
257# define ide_default_irq(base) (0)
258# define ide_init_default_irq(base) (0)
259#endif
260
847ddd2b 261#ifdef CONFIG_IDE_ARCH_OBSOLETE_INIT
1da177e4
LT		 262static inline void ide_init_hwif_ports(hw_regs_t *hw,
263 unsigned long io_addr,
264 unsigned long ctl_addr,
265 int *irq)
266{
267 if (!ctl_addr)
268 ide_std_init_ports(hw, io_addr, ide_default_io_ctl(io_addr));
269 else
270 ide_std_init_ports(hw, io_addr, ctl_addr);
271
272 if (irq)
273 *irq = 0;
274
275 hw->io_ports[IDE_IRQ_OFFSET] = 0;
276
277#ifdef CONFIG_PPC32
278 if (ppc_ide_md.ide_init_hwif)
279 ppc_ide_md.ide_init_hwif(hw, io_addr, ctl_addr, irq);
280#endif
281}
282#else
283static inline void ide_init_hwif_ports(hw_regs_t *hw,
284 unsigned long io_addr,
285 unsigned long ctl_addr,
286 int *irq)
287{
288 if (io_addr || ctl_addr)
289 printk(KERN_WARNING "%s: must not be called\n", __FUNCTION__);
290}
847ddd2b 291#endif /* CONFIG_IDE_ARCH_OBSOLETE_INIT */
1da177e4
LT		 292
293/* Currently only m68k, apus and m8xx need it */
294#ifndef IDE_ARCH_ACK_INTR
295# define ide_ack_intr(hwif) (1)
296#endif
297
298/* Currently only Atari needs it */
299#ifndef IDE_ARCH_LOCK
300# define ide_release_lock() do {} while (0)
301# define ide_get_lock(hdlr, data) do {} while (0)
302#endif /* IDE_ARCH_LOCK */
303
304/*
305 * Now for the data we need to maintain per-drive: ide_drive_t
306 */
307
308#define ide_scsi 0x21
309#define ide_disk 0x20
310#define ide_optical 0x7
311#define ide_cdrom 0x5
312#define ide_tape 0x1
313#define ide_floppy 0x0
314
315/*
316 * Special Driver Flags
317 *
318 * set_geometry : respecify drive geometry
319 * recalibrate : seek to cyl 0
320 * set_multmode : set multmode count
321 * set_tune : tune interface for drive
322 * serviced : service command
323 * reserved : unused
324 */
325typedef union {
326 unsigned all : 8;
327 struct {
328#if defined(__LITTLE_ENDIAN_BITFIELD)
329 unsigned set_geometry : 1;
330 unsigned recalibrate : 1;
331 unsigned set_multmode : 1;
332 unsigned set_tune : 1;
333 unsigned serviced : 1;
334 unsigned reserved : 3;
335#elif defined(__BIG_ENDIAN_BITFIELD)
336 unsigned reserved : 3;
337 unsigned serviced : 1;
338 unsigned set_tune : 1;
339 unsigned set_multmode : 1;
340 unsigned recalibrate : 1;
341 unsigned set_geometry : 1;
342#else
343#error "Please fix <asm/byteorder.h>"
344#endif
345 } b;
346} special_t;
347
348/*
349 * ATA DATA Register Special.
350 * ATA NSECTOR Count Register().
351 * ATAPI Byte Count Register.
1da177e4
LT		 352 */
353typedef union {
354 unsigned all :16;
355 struct {
356#if defined(__LITTLE_ENDIAN_BITFIELD)
357 unsigned low :8; /* LSB */
358 unsigned high :8; /* MSB */
359#elif defined(__BIG_ENDIAN_BITFIELD)
360 unsigned high :8; /* MSB */
361 unsigned low :8; /* LSB */
362#else
363#error "Please fix <asm/byteorder.h>"
364#endif
365 } b;
8447d9d5 366} ata_nsector_t, ata_data_t, atapi_bcount_t;
1da177e4 367
1da177e4
LT		 368/*
369 * ATA-IDE Select Register, aka Device-Head
370 *
371 * head : always zeros here
372 * unit : drive select number: 0/1
373 * bit5 : always 1
374 * lba : using LBA instead of CHS
375 * bit7 : always 1
376 */
377typedef union {
378 unsigned all : 8;
379 struct {
380#if defined(__LITTLE_ENDIAN_BITFIELD)
381 unsigned head : 4;
382 unsigned unit : 1;
383 unsigned bit5 : 1;
384 unsigned lba : 1;
385 unsigned bit7 : 1;
386#elif defined(__BIG_ENDIAN_BITFIELD)
387 unsigned bit7 : 1;
388 unsigned lba : 1;
389 unsigned bit5 : 1;
390 unsigned unit : 1;
391 unsigned head : 4;
392#else
393#error "Please fix <asm/byteorder.h>"
394#endif
395 } b;
396} select_t, ata_select_t;
397
398/*
399 * The ATA-IDE Status Register.
400 * The ATAPI Status Register.
401 *
402 * check : Error occurred
403 * idx : Index Error
404 * corr : Correctable error occurred
405 * drq : Data is request by the device
406 * dsc : Disk Seek Complete : ata
407 * : Media access command finished : atapi
408 * df : Device Fault : ata
409 * : Reserved : atapi
410 * drdy : Ready, Command Mode Capable : ata
411 * : Ignored for ATAPI commands : atapi
412 * bsy : Disk is Busy
413 * : The device has access to the command block
414 */
415typedef union {
416 unsigned all :8;
417 struct {
418#if defined(__LITTLE_ENDIAN_BITFIELD)
419 unsigned check :1;
420 unsigned idx :1;
421 unsigned corr :1;
422 unsigned drq :1;
423 unsigned dsc :1;
424 unsigned df :1;
425 unsigned drdy :1;
426 unsigned bsy :1;
427#elif defined(__BIG_ENDIAN_BITFIELD)
428 unsigned bsy :1;
429 unsigned drdy :1;
430 unsigned df :1;
431 unsigned dsc :1;
432 unsigned drq :1;
433 unsigned corr :1;
434 unsigned idx :1;
435 unsigned check :1;
436#else
437#error "Please fix <asm/byteorder.h>"
438#endif
439 } b;
440} ata_status_t, atapi_status_t;
441
1da177e4
LT		 442/*
443 * ATAPI Feature Register
444 *
445 * dma : Using DMA or PIO
446 * reserved321 : Reserved
447 * reserved654 : Reserved (Tag Type)
448 * reserved7 : Reserved
449 */
450typedef union {
451 unsigned all :8;
452 struct {
453#if defined(__LITTLE_ENDIAN_BITFIELD)
454 unsigned dma :1;
455 unsigned reserved321 :3;
456 unsigned reserved654 :3;
457 unsigned reserved7 :1;
458#elif defined(__BIG_ENDIAN_BITFIELD)
459 unsigned reserved7 :1;
460 unsigned reserved654 :3;
461 unsigned reserved321 :3;
462 unsigned dma :1;
463#else
464#error "Please fix <asm/byteorder.h>"
465#endif
466 } b;
467} atapi_feature_t;
468
469/*
470 * ATAPI Interrupt Reason Register.
471 *
472 * cod : Information transferred is command (1) or data (0)
473 * io : The device requests us to read (1) or write (0)
474 * reserved : Reserved
475 */
476typedef union {
477 unsigned all :8;
478 struct {
479#if defined(__LITTLE_ENDIAN_BITFIELD)
480 unsigned cod :1;
481 unsigned io :1;
482 unsigned reserved :6;
483#elif defined(__BIG_ENDIAN_BITFIELD)
484 unsigned reserved :6;
485 unsigned io :1;
486 unsigned cod :1;
487#else
488#error "Please fix <asm/byteorder.h>"
489#endif
490 } b;
491} atapi_ireason_t;
492
493/*
494 * The ATAPI error register.
495 *
496 * ili : Illegal Length Indication
497 * eom : End Of Media Detected
498 * abrt : Aborted command - As defined by ATA
499 * mcr : Media Change Requested - As defined by ATA
500 * sense_key : Sense key of the last failed packet command
501 */
502typedef union {
503 unsigned all :8;
504 struct {
505#if defined(__LITTLE_ENDIAN_BITFIELD)
506 unsigned ili :1;
507 unsigned eom :1;
508 unsigned abrt :1;
509 unsigned mcr :1;
510 unsigned sense_key :4;
511#elif defined(__BIG_ENDIAN_BITFIELD)
512 unsigned sense_key :4;
513 unsigned mcr :1;
514 unsigned abrt :1;
515 unsigned eom :1;
516 unsigned ili :1;
517#else
518#error "Please fix <asm/byteorder.h>"
519#endif
520 } b;
521} atapi_error_t;
522
1da177e4
LT		 523/*
524 * Status returned from various ide_ functions
525 */
526typedef enum {
527 ide_stopped, /* no drive operation was started */
528 ide_started, /* a drive operation was started, handler was set */
529} ide_startstop_t;
530
531struct ide_driver_s;
532struct ide_settings_s;
533
e3a59b4d
HR		 534#ifdef CONFIG_BLK_DEV_IDEACPI
535struct ide_acpi_drive_link;
536struct ide_acpi_hwif_link;
537#endif
538
1da177e4
LT		 539typedef struct ide_drive_s {
540 char name[4]; /* drive name, such as "hda" */
541 char driver_req[10]; /* requests specific driver */
542
165125e1 543 struct request_queue *queue; /* request queue */
1da177e4
LT		 544
545 struct request *rq; /* current request */
546 struct ide_drive_s *next; /* circular list of hwgroup drives */
1da177e4
LT		 547 void *driver_data; /* extra driver data */
548 struct hd_driveid *id; /* drive model identification info */
7662d046 549#ifdef CONFIG_IDE_PROC_FS
1da177e4
LT		 550 struct proc_dir_entry *proc; /* /proc/ide/ directory entry */
551 struct ide_settings_s *settings;/* /proc/ide/ drive settings */
7662d046 552#endif
1da177e4
LT		 553 struct hwif_s *hwif; /* actually (ide_hwif_t *) */
554
555 unsigned long sleep; /* sleep until this time */
556 unsigned long service_start; /* time we started last request */
557 unsigned long service_time; /* service time of last request */
558 unsigned long timeout; /* max time to wait for irq */
559
560 special_t special; /* special action flags */
561 select_t select; /* basic drive/head select reg value */
562
563 u8 keep_settings; /* restore settings after drive reset */
1da177e4
LT		 564 u8 using_dma; /* disk is using dma for read/write */
565 u8 retry_pio; /* retrying dma capable host in pio */
566 u8 state; /* retry state */
567 u8 waiting_for_dma; /* dma currently in progress */
568 u8 unmask; /* okay to unmask other irqs */
569 u8 bswap; /* byte swap data */
36193484 570 u8 noflush; /* don't attempt flushes */
1da177e4
LT		 571 u8 dsc_overlap; /* DSC overlap */
572 u8 nice1; /* give potential excess bandwidth */
573
574 unsigned present : 1; /* drive is physically present */
575 unsigned dead : 1; /* device ejected hint */
576 unsigned id_read : 1; /* 1=id read from disk 0 = synthetic */
577 unsigned noprobe : 1; /* from: hdx=noprobe */
578 unsigned removable : 1; /* 1 if need to do check_media_change */
579 unsigned attach : 1; /* needed for removable devices */
1da177e4
LT		 580 unsigned forced_geom : 1; /* 1 if hdx=c,h,s was given at boot */
581 unsigned no_unmask : 1; /* disallow setting unmask bit */
582 unsigned no_io_32bit : 1; /* disallow enabling 32bit I/O */
583 unsigned atapi_overlap : 1; /* ATAPI overlap (not supported) */
584 unsigned nice0 : 1; /* give obvious excess bandwidth */
585 unsigned nice2 : 1; /* give a share in our own bandwidth */
586 unsigned doorlocking : 1; /* for removable only: door lock/unlock works */
c223701c 587 unsigned nodma : 1; /* disallow DMA */
1da177e4
LT		 588 unsigned autotune : 2; /* 0=default, 1=autotune, 2=noautotune */
589 unsigned remap_0_to_1 : 1; /* 0=noremap, 1=remap 0->1 (for EZDrive) */
590 unsigned blocked : 1; /* 1=powermanagment told us not to do anything, so sleep nicely */
591 unsigned vdma : 1; /* 1=doing PIO over DMA 0=doing normal DMA */
1da177e4
LT		 592 unsigned scsi : 1; /* 0=default, 1=ide-scsi emulation */
593 unsigned sleeping : 1; /* 1=sleeping & sleep field valid */
594 unsigned post_reset : 1;
7f8f48af 595 unsigned udma33_warned : 1;
1da177e4 596
1497943e 597 u8 addressing; /* 0=28-bit, 1=48-bit, 2=48-bit doing 28-bit */
1da177e4
LT		 598 u8 quirk_list; /* considered quirky, set for a specific host */
599 u8 init_speed; /* transfer rate set at boot */
1da177e4 600 u8 current_speed; /* current transfer rate set */
513daadd 601 u8 desired_speed; /* desired transfer rate set */
1da177e4
LT		 602 u8 dn; /* now wide spread use */
603 u8 wcache; /* status of write cache */
604 u8 acoustic; /* acoustic management */
605 u8 media; /* disk, cdrom, tape, floppy, ... */
606 u8 ctl; /* "normal" value for IDE_CONTROL_REG */
607 u8 ready_stat; /* min status value for drive ready */
608 u8 mult_count; /* current multiple sector setting */
609 u8 mult_req; /* requested multiple sector setting */
610 u8 tune_req; /* requested drive tuning setting */
611 u8 io_32bit; /* 0=16-bit, 1=32-bit, 2/3=32bit+sync */
612 u8 bad_wstat; /* used for ignoring WRERR_STAT */
613 u8 nowerr; /* used for ignoring WRERR_STAT */
614 u8 sect0; /* offset of first sector for DM6:DDO */
615 u8 head; /* "real" number of heads */
616 u8 sect; /* "real" sectors per track */
617 u8 bios_head; /* BIOS/fdisk/LILO number of heads */
618 u8 bios_sect; /* BIOS/fdisk/LILO sectors per track */
619
620 unsigned int bios_cyl; /* BIOS/fdisk/LILO number of cyls */
621 unsigned int cyl; /* "real" number of cyls */
26bcb879 622 unsigned int drive_data; /* used by set_pio_mode/selectproc */
1da177e4
LT		 623 unsigned int failures; /* current failure count */
624 unsigned int max_failures; /* maximum allowed failure count */
dbe217af 625 u64 probed_capacity;/* initial reported media capacity (ide-cd only currently) */
1da177e4
LT		 626
627 u64 capacity64; /* total number of sectors */
628
629 int lun; /* logical unit */
630 int crc_count; /* crc counter to reduce drive speed */
e3a59b4d
HR		 631#ifdef CONFIG_BLK_DEV_IDEACPI
632 struct ide_acpi_drive_link *acpidata;
633#endif
1da177e4
LT		 634 struct list_head list;
635 struct device gendev;
f36d4024 636 struct completion gendev_rel_comp; /* to deal with device release() */
1da177e4
LT		 637} ide_drive_t;
638
8604affd
BZ		 639#define to_ide_device(dev)container_of(dev, ide_drive_t, gendev)
640
1da177e4
LT		 641#define IDE_CHIPSET_PCI_MASK \
642 ((1<<ide_pci)|(1<<ide_cmd646)|(1<<ide_ali14xx))
643#define IDE_CHIPSET_IS_PCI(c) ((IDE_CHIPSET_PCI_MASK >> (c)) & 1)
644
039788e1 645struct ide_port_info;
1da177e4
LT		 646
647typedef struct hwif_s {
648 struct hwif_s *next; /* for linked-list in ide_hwgroup_t */
649 struct hwif_s *mate; /* other hwif from same PCI chip */
650 struct hwgroup_s *hwgroup; /* actually (ide_hwgroup_t *) */
651 struct proc_dir_entry *proc; /* /proc/ide/ directory entry */
652
653 char name[6]; /* name of interface, eg. "ide0" */
654
655 /* task file registers for pata and sata */
656 unsigned long io_ports[IDE_NR_PORTS];
657 unsigned long sata_scr[SATA_NR_PORTS];
658 unsigned long sata_misc[SATA_NR_PORTS];
659
1da177e4
LT		 660 ide_drive_t drives[MAX_DRIVES]; /* drive info */
661
662 u8 major; /* our major number */
663 u8 index; /* 0 for ide0; 1 for ide1; ... */
664 u8 channel; /* for dual-port chips: 0=primary, 1=secondary */
665 u8 straight8; /* Alan's straight 8 check */
666 u8 bus_state; /* power state of the IDE bus */
667
e95d9c6b 668 u32 host_flags;
6a824c92 669
4099d143
BZ		 670 u8 pio_mask;
671
1da177e4
LT		 672 u8 ultra_mask;
673 u8 mwdma_mask;
674 u8 swdma_mask;
675
49521f97
BZ		 676 u8 cbl; /* cable type */
677
1da177e4
LT		 678 hwif_chipset_t chipset; /* sub-module for tuning.. */
679
680 struct pci_dev *pci_dev; /* for pci chipsets */
85620436 681 const struct ide_port_info *cds; /* chipset device struct */
1da177e4 682
18e181fe
BZ		 683 ide_ack_intr_t *ack_intr;
684
1da177e4
LT		 685 void (*rw_disk)(ide_drive_t *, struct request *);
686
687#if 0
688 ide_hwif_ops_t *hwifops;
689#else
88b2b32b 690 /* routine to program host for PIO mode */
26bcb879 691 void (*set_pio_mode)(ide_drive_t *, const u8);
88b2b32b
BZ		 692 /* routine to program host for DMA mode */
693 void (*set_dma_mode)(ide_drive_t *, const u8);
1da177e4
LT		 694 /* tweaks hardware to select drive */
695 void (*selectproc)(ide_drive_t *);
696 /* chipset polling based on hba specifics */
697 int (*reset_poll)(ide_drive_t *);
698 /* chipset specific changes to default for device-hba resets */
699 void (*pre_reset)(ide_drive_t *);
700 /* routine to reset controller after a disk reset */
701 void (*resetproc)(ide_drive_t *);
702 /* special interrupt handling for shared pci interrupts */
703 void (*intrproc)(ide_drive_t *);
704 /* special host masking for drive selection */
705 void (*maskproc)(ide_drive_t *, int);
706 /* check host's drive quirk list */
707 int (*quirkproc)(ide_drive_t *);
708 /* driver soft-power interface */
709 int (*busproc)(ide_drive_t *, int);
1da177e4 710#endif
b4e44369 711 u8 (*mdma_filter)(ide_drive_t *);
2d5eaa6d 712 u8 (*udma_filter)(ide_drive_t *);
1da177e4 713
fd9bb539
BZ		 714 void (*fixup)(struct hwif_s *);
715
1da177e4
LT		 716 void (*ata_input_data)(ide_drive_t *, void *, u32);
717 void (*ata_output_data)(ide_drive_t *, void *, u32);
718
719 void (*atapi_input_bytes)(ide_drive_t *, void *, u32);
720 void (*atapi_output_bytes)(ide_drive_t *, void *, u32);
721
722 int (*dma_setup)(ide_drive_t *);
723 void (*dma_exec_cmd)(ide_drive_t *, u8);
724 void (*dma_start)(ide_drive_t *);
725 int (*ide_dma_end)(ide_drive_t *drive);
1da177e4 726 int (*ide_dma_on)(ide_drive_t *drive);
7469aaf6 727 void (*dma_off_quietly)(ide_drive_t *drive);
1da177e4 728 int (*ide_dma_test_irq)(ide_drive_t *drive);
f0dd8712 729 void (*ide_dma_clear_irq)(ide_drive_t *drive);
ccf35289 730 void (*dma_host_on)(ide_drive_t *drive);
7469aaf6 731 void (*dma_host_off)(ide_drive_t *drive);
841d2a9b 732 void (*dma_lost_irq)(ide_drive_t *drive);
c283f5db 733 void (*dma_timeout)(ide_drive_t *drive);
1da177e4
LT		 734
735 void (*OUTB)(u8 addr, unsigned long port);
736 void (*OUTBSYNC)(ide_drive_t *drive, u8 addr, unsigned long port);
737 void (*OUTW)(u16 addr, unsigned long port);
1da177e4
LT		 738 void (*OUTSW)(unsigned long port, void *addr, u32 count);
739 void (*OUTSL)(unsigned long port, void *addr, u32 count);
740
741 u8 (*INB)(unsigned long port);
742 u16 (*INW)(unsigned long port);
1da177e4
LT		 743 void (*INSW)(unsigned long port, void *addr, u32 count);
744 void (*INSL)(unsigned long port, void *addr, u32 count);
745
746 /* dma physical region descriptor table (cpu view) */
747 unsigned int *dmatable_cpu;
748 /* dma physical region descriptor table (dma view) */
749 dma_addr_t dmatable_dma;
750 /* Scatter-gather list used to build the above */
751 struct scatterlist *sg_table;
752 int sg_max_nents; /* Maximum number of entries in it */
753 int sg_nents; /* Current number of entries in it */
754 int sg_dma_direction; /* dma transfer direction */
755
756 /* data phase of the active command (currently only valid for PIO/DMA) */
757 int data_phase;
758
759 unsigned int nsect;
760 unsigned int nleft;
55c16a70 761 struct scatterlist *cursg;
1da177e4
LT		 762 unsigned int cursg_ofs;
763
1da177e4
LT		 764 int rqsize; /* max sectors per request */
765 int irq; /* our irq number */
766
1da177e4
LT		 767 unsigned long dma_base; /* base addr for dma ports */
768 unsigned long dma_command; /* dma command register */
769 unsigned long dma_vendor1; /* dma vendor 1 register */
770 unsigned long dma_status; /* dma status register */
771 unsigned long dma_vendor3; /* dma vendor 3 register */
772 unsigned long dma_prdtable; /* actual prd table address */
1da177e4 773
1da177e4
LT		 774 unsigned long config_data; /* for use by chipset-specific code */
775 unsigned long select_data; /* for use by chipset-specific code */
776
020e322d
SS		 777 unsigned long extra_base; /* extra addr for dma ports */
778 unsigned extra_ports; /* number of extra dma ports */
779
1da177e4
LT		 780 unsigned noprobe : 1; /* don't probe for this interface */
781 unsigned present : 1; /* this interface exists */
782 unsigned hold : 1; /* this interface is always present */
783 unsigned serialized : 1; /* serialized all channel operation */
784 unsigned sharing_irq: 1; /* 1 = sharing irq with another hwif */
785 unsigned reset : 1; /* reset after probe */
1da177e4
LT		 786 unsigned auto_poll : 1; /* supports nop auto-poll */
787 unsigned sg_mapped : 1; /* sg_table and sg_nents are ready */
208a08f7 788 unsigned no_io_32bit : 1; /* 1 = can not do 32-bit IO ops */
2ad1e558 789 unsigned mmio : 1; /* host uses MMIO */
1da177e4
LT		 790
791 struct device gendev;
f36d4024 792 struct completion gendev_rel_comp; /* To deal with device release() */
1da177e4
LT		 793
794 void *hwif_data; /* extra hwif data */
795
796 unsigned dma;
e3a59b4d
HR		 797
798#ifdef CONFIG_BLK_DEV_IDEACPI
799 struct ide_acpi_hwif_link *acpidata;
800#endif
22fc6ecc 801} ____cacheline_internodealigned_in_smp ide_hwif_t;
1da177e4
LT		 802
803/*
804 * internal ide interrupt handler type
805 */
806typedef ide_startstop_t (ide_pre_handler_t)(ide_drive_t *, struct request *);
807typedef ide_startstop_t (ide_handler_t)(ide_drive_t *);
808typedef int (ide_expiry_t)(ide_drive_t *);
809
810typedef struct hwgroup_s {
811 /* irq handler, if active */
812 ide_startstop_t (*handler)(ide_drive_t *);
813 /* irq handler, suspended if active */
814 ide_startstop_t (*handler_save)(ide_drive_t *);
815 /* BOOL: protects all fields below */
816 volatile int busy;
817 /* BOOL: wake us up on timer expiry */
818 unsigned int sleeping : 1;
819 /* BOOL: polling active & poll_timeout field valid */
820 unsigned int polling : 1;
913759ac
AC		 821 /* BOOL: in a polling reset situation. Must not trigger another reset yet */
822 unsigned int resetting : 1;
823
1da177e4
LT		 824 /* current drive */
825 ide_drive_t *drive;
826 /* ptr to current hwif in linked-list */
827 ide_hwif_t *hwif;
828
829 /* for pci chipsets */
830 struct pci_dev *pci_dev;
1da177e4
LT		 831
832 /* current request */
833 struct request *rq;
834 /* failsafe timer */
835 struct timer_list timer;
836 /* local copy of current write rq */
837 struct request wrq;
838 /* timeout value during long polls */
839 unsigned long poll_timeout;
840 /* queried upon timeouts */
841 int (*expiry)(ide_drive_t *);
842 /* ide_system_bus_speed */
843 int pio_clock;
23450319
SS		 844 int req_gen;
845 int req_gen_timer;
1da177e4
LT		 846
847 unsigned char cmd_buf[4];
848} ide_hwgroup_t;
849
7662d046
BZ		 850typedef struct ide_driver_s ide_driver_t;
851
f9383c42 852extern struct mutex ide_setting_mtx;
1da177e4 853
7662d046
BZ		 854int set_io_32bit(ide_drive_t *, int);
855int set_pio_mode(ide_drive_t *, int);
856int set_using_dma(ide_drive_t *, int);
857
858#ifdef CONFIG_IDE_PROC_FS
1da177e4
LT		 859/*
860 * configurable drive settings
861 */
862
863#define TYPE_INT 0
1497943e
BZ		 864#define TYPE_BYTE 1
865#define TYPE_SHORT 2
1da177e4
LT		 866
867#define SETTING_READ (1 << 0)
868#define SETTING_WRITE (1 << 1)
869#define SETTING_RW (SETTING_READ | SETTING_WRITE)
870
871typedef int (ide_procset_t)(ide_drive_t *, int);
872typedef struct ide_settings_s {
873 char *name;
874 int rw;
1da177e4
LT		 875 int data_type;
876 int min;
877 int max;
878 int mul_factor;
879 int div_factor;
880 void *data;
881 ide_procset_t *set;
882 int auto_remove;
883 struct ide_settings_s *next;
884} ide_settings_t;
885
1497943e 886int ide_add_setting(ide_drive_t *, const char *, int, int, int, int, int, int, void *, ide_procset_t *set);
1da177e4
LT		 887
888/*
889 * /proc/ide interface
890 */
891typedef struct {
892 const char *name;
893 mode_t mode;
894 read_proc_t *read_proc;
895 write_proc_t *write_proc;
896} ide_proc_entry_t;
897
ecfd80e4
BZ		 898void proc_ide_create(void);
899void proc_ide_destroy(void);
5cbf79cd
BZ		 900void ide_proc_register_port(ide_hwif_t *);
901void ide_proc_unregister_port(ide_hwif_t *);
7662d046
BZ		 902void ide_proc_register_driver(ide_drive_t *, ide_driver_t *);
903void ide_proc_unregister_driver(ide_drive_t *, ide_driver_t *);
904
905void ide_add_generic_settings(ide_drive_t *);
906
1da177e4
LT		 907read_proc_t proc_ide_read_capacity;
908read_proc_t proc_ide_read_geometry;
909
910#ifdef CONFIG_BLK_DEV_IDEPCI
911void ide_pci_create_host_proc(const char *, get_info_t *);
912#endif
913
914/*
915 * Standard exit stuff:
916 */
917#define PROC_IDE_READ_RETURN(page,start,off,count,eof,len) \
918{ \
919 len -= off; \
920 if (len < count) { \
921 *eof = 1; \
922 if (len <= 0) \
923 return 0; \
924 } else \
925 len = count; \
926 *start = page + off; \
927 return len; \
928}
929#else
ecfd80e4
BZ		 930static inline void proc_ide_create(void) { ; }
931static inline void proc_ide_destroy(void) { ; }
5cbf79cd
BZ		 932static inline void ide_proc_register_port(ide_hwif_t *hwif) { ; }
933static inline void ide_proc_unregister_port(ide_hwif_t *hwif) { ; }
7662d046
BZ		 934static inline void ide_proc_register_driver(ide_drive_t *drive, ide_driver_t *driver) { ; }
935static inline void ide_proc_unregister_driver(ide_drive_t *drive, ide_driver_t *driver) { ; }
936static inline void ide_add_generic_settings(ide_drive_t *drive) { ; }
1da177e4
LT		 937#define PROC_IDE_READ_RETURN(page,start,off,count,eof,len) return 0;
938#endif
939
940/*
941 * Power Management step value (rq->pm->pm_step).
942 *
943 * The step value starts at 0 (ide_pm_state_start_suspend) for a
944 * suspend operation or 1000 (ide_pm_state_start_resume) for a
945 * resume operation.
946 *
947 * For each step, the core calls the subdriver start_power_step() first.
948 * This can return:
949 * - ide_stopped : In this case, the core calls us back again unless
950 * step have been set to ide_power_state_completed.
951 * - ide_started : In this case, the channel is left busy until an
952 * async event (interrupt) occurs.
953 * Typically, start_power_step() will issue a taskfile request with
954 * do_rw_taskfile().
955 *
956 * Upon reception of the interrupt, the core will call complete_power_step()
957 * with the error code if any. This routine should update the step value
958 * and return. It should not start a new request. The core will call
959 * start_power_step for the new step value, unless step have been set to
960 * ide_power_state_completed.
961 *
962 * Subdrivers are expected to define their own additional power
963 * steps from 1..999 for suspend and from 1001..1999 for resume,
964 * other values are reserved for future use.
965 */
966
967enum {
968 ide_pm_state_completed = -1,
969 ide_pm_state_start_suspend = 0,
970 ide_pm_state_start_resume = 1000,
971};
972
973/*
974 * Subdrivers support.
4ef3b8f4
LR		 975 *
976 * The gendriver.owner field should be set to the module owner of this driver.
977 * The gendriver.name field should be set to the name of this driver
1da177e4 978 */
7662d046 979struct ide_driver_s {
1da177e4
LT		 980 const char *version;
981 u8 media;
1da177e4 982 unsigned supports_dsc_overlap : 1;
1da177e4
LT		 983 ide_startstop_t (*do_request)(ide_drive_t *, struct request *, sector_t);
984 int (*end_request)(ide_drive_t *, int, int);
985 ide_startstop_t (*error)(ide_drive_t *, struct request *rq, u8, u8);
986 ide_startstop_t (*abort)(ide_drive_t *, struct request *rq);
1da177e4 987 struct device_driver gen_driver;
4031bbe4
RK		 988 int (*probe)(ide_drive_t *);
989 void (*remove)(ide_drive_t *);
0d2157f7 990 void (*resume)(ide_drive_t *);
4031bbe4 991 void (*shutdown)(ide_drive_t *);
7662d046
BZ		 992#ifdef CONFIG_IDE_PROC_FS
993 ide_proc_entry_t *proc;
994#endif
995};
1da177e4 996
4031bbe4
RK		 997#define to_ide_driver(drv) container_of(drv, ide_driver_t, gen_driver)
998
1da177e4
LT		 999int generic_ide_ioctl(ide_drive_t *, struct file *, struct block_device *, unsigned, unsigned long);
1000
1001/*
1002 * ide_hwifs[] is the master data structure used to keep track
1003 * of just about everything in ide.c. Whenever possible, routines
1004 * should be using pointers to a drive (ide_drive_t *) or
1005 * pointers to a hwif (ide_hwif_t *), rather than indexing this
1006 * structure directly (the allocation/layout may change!).
1007 *
1008 */
1009#ifndef _IDE_C
1010extern ide_hwif_t ide_hwifs[]; /* master data repository */
1011#endif
1012extern int noautodma;
1013
1014extern int ide_end_request (ide_drive_t *drive, int uptodate, int nrsecs);
dbe217af
AC		 1015int ide_end_dequeued_request(ide_drive_t *drive, struct request *rq,
1016 int uptodate, int nr_sectors);
1da177e4 1017
1da177e4
LT		 1018extern void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler, unsigned int timeout, ide_expiry_t *expiry);
1019
cd2a2d96
BZ		 1020void ide_execute_command(ide_drive_t *, u8, ide_handler_t *, unsigned int,
1021 ide_expiry_t *);
1da177e4
LT		 1022
1023ide_startstop_t __ide_error(ide_drive_t *, struct request *, u8, u8);
1024
1da177e4
LT		 1025ide_startstop_t ide_error (ide_drive_t *drive, const char *msg, byte stat);
1026
1027ide_startstop_t __ide_abort(ide_drive_t *, struct request *);
1028
1da177e4
LT		 1029extern ide_startstop_t ide_abort(ide_drive_t *, const char *);
1030
1031extern void ide_fix_driveid(struct hd_driveid *);
01745112 1032
1da177e4
LT		 1033extern void ide_fixstring(u8 *, const int, const int);
1034
74af21cf 1035int ide_wait_stat(ide_startstop_t *, ide_drive_t *, u8, u8, unsigned long);
1da177e4 1036
1da177e4
LT		 1037extern ide_startstop_t ide_do_reset (ide_drive_t *);
1038
1da177e4
LT		 1039extern void ide_init_drive_cmd (struct request *rq);
1040
1da177e4
LT		 1041/*
1042 * "action" parameter type for ide_do_drive_cmd() below.
1043 */
1044typedef enum {
1045 ide_wait, /* insert rq at end of list, and wait for it */
1da177e4
LT		 1046 ide_preempt, /* insert rq in front of current request */
1047 ide_head_wait, /* insert rq in front of current request and wait for it */
1048 ide_end /* insert rq at end of list, but don't wait for it */
1049} ide_action_t;
1050
1da177e4
LT		 1051extern int ide_do_drive_cmd(ide_drive_t *, struct request *, ide_action_t);
1052
1da177e4
LT		 1053extern void ide_end_drive_cmd(ide_drive_t *, u8, u8);
1054
1055/*
1056 * Issue ATA command and wait for completion.
1057 * Use for implementing commands in kernel
1058 *
1059 * (ide_drive_t *drive, u8 cmd, u8 nsect, u8 feature, u8 sectors, u8 *buf)
1060 */
1061extern int ide_wait_cmd(ide_drive_t *, u8, u8, u8, u8, u8 *);
1062
650d841d
BZ		 1063struct ide_taskfile {
1064 u8 hob_data; /* 0: high data byte (for TASKFILE IOCTL) */
1065
1066 u8 hob_feature; /* 1-5: additional data to support LBA48 */
1067 u8 hob_nsect;
1068 u8 hob_lbal;
1069 u8 hob_lbam;
1070 u8 hob_lbah;
1071
1072 u8 data; /* 6: low data byte (for TASKFILE IOCTL) */
1073
1074 union { /*  7: */
1075 u8 error; /* read: error */
1076 u8 feature; /* write: feature */
1077 };
1078
1079 u8 nsect; /* 8: number of sectors */
1080 u8 lbal; /* 9: LBA low */
1081 u8 lbam; /* 10: LBA mid */
1082 u8 lbah; /* 11: LBA high */
1083
1084 u8 device; /* 12: device select */
1085
1086 union { /* 13: */
1087 u8 status; /*  read: status  */
1088 u8 command; /* write: command */
1089 };
1090};
1091
1da177e4 1092typedef struct ide_task_s {
650d841d
BZ		 1093 union {
1094 struct ide_taskfile tf;
1095 u8 tf_array[14];
1096 };
1da177e4
LT		 1097 ide_reg_valid_t tf_out_flags;
1098 ide_reg_valid_t tf_in_flags;
1099 int data_phase;
1100 int command_type;
1101 ide_pre_handler_t *prehandler;
1102 ide_handler_t *handler;
1103 struct request *rq; /* copy of request */
1104 void *special; /* valid_t generally */
1105} ide_task_t;
1106
1107extern u32 ide_read_24(ide_drive_t *);
1108
1109extern void SELECT_DRIVE(ide_drive_t *);
1110extern void SELECT_INTERRUPT(ide_drive_t *);
1111extern void SELECT_MASK(ide_drive_t *, int);
1112extern void QUIRK_LIST(ide_drive_t *);
1113
1114extern int drive_is_ready(ide_drive_t *);
1da177e4
LT		 1115
1116/*
1117 * taskfile io for disks for now...and builds request from ide_ioctl
1118 */
1119extern ide_startstop_t do_rw_taskfile(ide_drive_t *, ide_task_t *);
1120
1121/*
1122 * Special Flagged Register Validation Caller
1123 */
1124extern ide_startstop_t flagged_taskfile(ide_drive_t *, ide_task_t *);
1125
1126extern ide_startstop_t set_multmode_intr(ide_drive_t *);
1127extern ide_startstop_t set_geometry_intr(ide_drive_t *);
1128extern ide_startstop_t recal_intr(ide_drive_t *);
1129extern ide_startstop_t task_no_data_intr(ide_drive_t *);
1130extern ide_startstop_t task_in_intr(ide_drive_t *);
1131extern ide_startstop_t pre_task_out_intr(ide_drive_t *, struct request *);
1132
1133extern int ide_raw_taskfile(ide_drive_t *, ide_task_t *, u8 *);
1134
1135int ide_taskfile_ioctl(ide_drive_t *, unsigned int, unsigned long);
1136int ide_cmd_ioctl(ide_drive_t *, unsigned int, unsigned long);
1137int ide_task_ioctl(ide_drive_t *, unsigned int, unsigned long);
1138
1139extern int system_bus_clock(void);
1140
1141extern int ide_driveid_update(ide_drive_t *);
1142extern int ide_ata66_check(ide_drive_t *, ide_task_t *);
1143extern int ide_config_drive_speed(ide_drive_t *, u8);
1144extern u8 eighty_ninty_three (ide_drive_t *);
1145extern int set_transfer(ide_drive_t *, ide_task_t *);
1146extern int taskfile_lib_get_identify(ide_drive_t *drive, u8 *);
1147
1148extern int ide_wait_not_busy(ide_hwif_t *hwif, unsigned long timeout);
1149
1da177e4
LT		 1150extern void ide_stall_queue(ide_drive_t *drive, unsigned long timeout);
1151
1152extern int ide_spin_wait_hwgroup(ide_drive_t *);
1153extern void ide_timer_expiry(unsigned long);
7d12e780 1154extern irqreturn_t ide_intr(int irq, void *dev_id);
165125e1 1155extern void do_ide_request(struct request_queue *);
1da177e4
LT		 1156
1157void ide_init_disk(struct gendisk *, ide_drive_t *);
1158
1da177e4
LT		 1159extern int ideprobe_init(void);
1160
6d208b39 1161#ifdef CONFIG_IDEPCI_PCIBUS_ORDER
1da177e4 1162extern void ide_scan_pcibus(int scan_direction) __init;
725522b5
GKH		 1163extern int __ide_pci_register_driver(struct pci_driver *driver, struct module *owner, const char *mod_name);
1164#define ide_pci_register_driver(d) __ide_pci_register_driver(d, THIS_MODULE, KBUILD_MODNAME)
6d208b39
BZ		 1165#else
1166#define ide_pci_register_driver(d) pci_register_driver(d)
1167#endif
1168
85620436
BZ		 1169void ide_pci_setup_ports(struct pci_dev *, const struct ide_port_info *, int, u8 *);
1170void ide_setup_pci_noise(struct pci_dev *, const struct ide_port_info *);
1da177e4
LT		 1171
1172extern void default_hwif_iops(ide_hwif_t *);
1173extern void default_hwif_mmiops(ide_hwif_t *);
1174extern void default_hwif_transport(ide_hwif_t *);
1175
1da177e4
LT		 1176typedef struct ide_pci_enablebit_s {
1177 u8 reg; /* byte pci reg holding the enable-bit */
1178 u8 mask; /* mask to isolate the enable-bit */
1179 u8 val; /* value of masked reg when "enabled" */
1180} ide_pci_enablebit_t;
1181
1182enum {
1183 /* Uses ISA control ports not PCI ones. */
a5d8c5c8 1184 IDE_HFLAG_ISA_PORTS = (1 << 0),
6a824c92 1185 /* single port device */
a5d8c5c8 1186 IDE_HFLAG_SINGLE = (1 << 1),
6a824c92
BZ		 1187 /* don't use legacy PIO blacklist */
1188 IDE_HFLAG_PIO_NO_BLACKLIST = (1 << 2),
1189 /* don't use conservative PIO "downgrade" */
1190 IDE_HFLAG_PIO_NO_DOWNGRADE = (1 << 3),
26bcb879
BZ		 1191 /* use PIO8/9 for prefetch off/on */
1192 IDE_HFLAG_ABUSE_PREFETCH = (1 << 4),
1193 /* use PIO6/7 for fast-devsel off/on */
1194 IDE_HFLAG_ABUSE_FAST_DEVSEL = (1 << 5),
1195 /* use 100-102 and 200-202 PIO values to set DMA modes */
1196 IDE_HFLAG_ABUSE_DMA_MODES = (1 << 6),
aedea591
BZ		 1197 /*
1198 * keep DMA setting when programming PIO mode, may be used only
1199 * for hosts which have separate PIO and DMA timings (ie. PMAC)
1200 */
1201 IDE_HFLAG_SET_PIO_MODE_KEEP_DMA = (1 << 7),
88b2b32b
BZ		 1202 /* program host for the transfer mode after programming device */
1203 IDE_HFLAG_POST_SET_MODE = (1 << 8),
1204 /* don't program host/device for the transfer mode ("smart" hosts) */
1205 IDE_HFLAG_NO_SET_MODE = (1 << 9),
0ae2e178
BZ		 1206 /* trust BIOS for programming chipset/device for DMA */
1207 IDE_HFLAG_TRUST_BIOS_FOR_DMA = (1 << 10),
1208 /* host uses VDMA */
1209 IDE_HFLAG_VDMA = (1 << 11),
33c1002e
BZ		 1210 /* ATAPI DMA is unsupported */
1211 IDE_HFLAG_NO_ATAPI_DMA = (1 << 12),
7cab14a7
BZ		 1212 /* set if host is a "bootable" controller */
1213 IDE_HFLAG_BOOTABLE = (1 << 13),
47b68788
BZ		 1214 /* host doesn't support DMA */
1215 IDE_HFLAG_NO_DMA = (1 << 14),
1216 /* check if host is PCI IDE device before allowing DMA */
1217 IDE_HFLAG_NO_AUTODMA = (1 << 15),
9ffcf364
BZ		 1218 /* host is CS5510/CS5520 */
1219 IDE_HFLAG_CS5520 = (1 << 16),
238e4f14
BZ		 1220 /* no LBA48 */
1221 IDE_HFLAG_NO_LBA48 = (1 << 17),
1222 /* no LBA48 DMA */
1223 IDE_HFLAG_NO_LBA48_DMA = (1 << 18),
ed67b923
BZ		 1224 /* data FIFO is cleared by an error */
1225 IDE_HFLAG_ERROR_STOPS_FIFO = (1 << 19),
1c51361a
BZ		 1226 /* serialize ports */
1227 IDE_HFLAG_SERIALIZE = (1 << 20),
3985ee3b
BZ		 1228 /* use legacy IRQs */
1229 IDE_HFLAG_LEGACY_IRQS = (1 << 21),
8acf28c0
BZ		 1230 /* force use of legacy IRQs */
1231 IDE_HFLAG_FORCE_LEGACY_IRQS = (1 << 22),
272a3709
BZ		 1232 /* limit LBA48 requests to 256 sectors */
1233 IDE_HFLAG_RQSIZE_256 = (1 << 23),
caea7602
BZ		 1234 /* use 32-bit I/O ops */
1235 IDE_HFLAG_IO_32BIT = (1 << 24),
1236 /* unmask IRQs */
1237 IDE_HFLAG_UNMASK_IRQS = (1 << 25),
1da177e4
LT		 1238};
1239
7cab14a7
BZ		 1240#ifdef CONFIG_BLK_DEV_OFFBOARD
1241# define IDE_HFLAG_OFF_BOARD IDE_HFLAG_BOOTABLE
1242#else
1243# define IDE_HFLAG_OFF_BOARD 0
1244#endif
1245
039788e1 1246struct ide_port_info {
1da177e4 1247 char *name;
1da177e4
LT		 1248 unsigned int (*init_chipset)(struct pci_dev *, const char *);
1249 void (*init_iops)(ide_hwif_t *);
1250 void (*init_hwif)(ide_hwif_t *);
1251 void (*init_dma)(ide_hwif_t *, unsigned long);
1252 void (*fixup)(ide_hwif_t *);
1da177e4 1253 ide_pci_enablebit_t enablebits[2];
528a572d 1254 hwif_chipset_t chipset;
1da177e4 1255 unsigned int extra;
9ffcf364 1256 u32 host_flags;
4099d143 1257 u8 pio_mask;
5f8b6c34
BZ		 1258 u8 swdma_mask;
1259 u8 mwdma_mask;
18137207 1260 u8 udma_mask;
039788e1 1261};
1da177e4 1262
85620436
BZ		 1263int ide_setup_pci_device(struct pci_dev *, const struct ide_port_info *);
1264int ide_setup_pci_devices(struct pci_dev *, struct pci_dev *, const struct ide_port_info *);
1da177e4
LT		 1265
1266void ide_map_sg(ide_drive_t *, struct request *);
1267void ide_init_sg_cmd(ide_drive_t *, struct request *);
1268
1269#define BAD_DMA_DRIVE 0
1270#define GOOD_DMA_DRIVE 1
1271
65e5f2e3
JC		 1272struct drive_list_entry {
1273 const char *id_model;
1274 const char *id_firmware;
1275};
1276
1277int ide_in_drive_list(struct hd_driveid *, const struct drive_list_entry *);
a5b7e70d
BZ		 1278
1279#ifdef CONFIG_BLK_DEV_IDEDMA
1da177e4 1280int __ide_dma_bad_drive(ide_drive_t *);
3ab7efe8 1281int ide_id_dma_bug(ide_drive_t *);
7670df73
BZ		 1282
1283u8 ide_find_dma_mode(ide_drive_t *, u8);
1284
1285static inline u8 ide_max_dma_mode(ide_drive_t *drive)
1286{
1287 return ide_find_dma_mode(drive, XFER_UDMA_6);
1288}
1289
7469aaf6 1290void ide_dma_off(ide_drive_t *);
3608b5d7 1291int ide_set_dma(ide_drive_t *);
1da177e4
LT		 1292ide_startstop_t ide_dma_intr(ide_drive_t *);
1293
1294#ifdef CONFIG_BLK_DEV_IDEDMA_PCI
1295extern int ide_build_sglist(ide_drive_t *, struct request *);
1296extern int ide_build_dmatable(ide_drive_t *, struct request *);
1297extern void ide_destroy_dmatable(ide_drive_t *);
1298extern int ide_release_dma(ide_hwif_t *);
1299extern void ide_setup_dma(ide_hwif_t *, unsigned long, unsigned int);
1300
7469aaf6
BZ		 1301void ide_dma_host_off(ide_drive_t *);
1302void ide_dma_off_quietly(ide_drive_t *);
ccf35289 1303void ide_dma_host_on(ide_drive_t *);
1da177e4 1304extern int __ide_dma_on(ide_drive_t *);
1da177e4
LT		 1305extern int ide_dma_setup(ide_drive_t *);
1306extern void ide_dma_start(ide_drive_t *);
1307extern int __ide_dma_end(ide_drive_t *);
841d2a9b 1308extern void ide_dma_lost_irq(ide_drive_t *);
c283f5db 1309extern void ide_dma_timeout(ide_drive_t *);
1da177e4
LT		 1310#endif /* CONFIG_BLK_DEV_IDEDMA_PCI */
1311
1312#else
3ab7efe8 1313static inline int ide_id_dma_bug(ide_drive_t *drive) { return 0; }
7670df73 1314static inline u8 ide_find_dma_mode(ide_drive_t *drive, u8 speed) { return 0; }
2d5eaa6d 1315static inline u8 ide_max_dma_mode(ide_drive_t *drive) { return 0; }
7469aaf6 1316static inline void ide_dma_off(ide_drive_t *drive) { ; }
1da177e4 1317static inline void ide_dma_verbose(ide_drive_t *drive) { ; }
3608b5d7 1318static inline int ide_set_dma(ide_drive_t *drive) { return 1; }
1da177e4
LT		 1319#endif /* CONFIG_BLK_DEV_IDEDMA */
1320
1321#ifndef CONFIG_BLK_DEV_IDEDMA_PCI
1322static inline void ide_release_dma(ide_hwif_t *drive) {;}
1323#endif
1324
e3a59b4d
HR		 1325#ifdef CONFIG_BLK_DEV_IDEACPI
1326extern int ide_acpi_exec_tfs(ide_drive_t *drive);
1327extern void ide_acpi_get_timing(ide_hwif_t *hwif);
1328extern void ide_acpi_push_timing(ide_hwif_t *hwif);
1329extern void ide_acpi_init(ide_hwif_t *hwif);
5e32132b 1330extern void ide_acpi_set_state(ide_hwif_t *hwif, int on);
e3a59b4d
HR		 1331#else
1332static inline int ide_acpi_exec_tfs(ide_drive_t *drive) { return 0; }
1333static inline void ide_acpi_get_timing(ide_hwif_t *hwif) { ; }
1334static inline void ide_acpi_push_timing(ide_hwif_t *hwif) { ; }
1335static inline void ide_acpi_init(ide_hwif_t *hwif) { ; }
5e32132b 1336static inline void ide_acpi_set_state(ide_hwif_t *hwif, int on) {}
e3a59b4d
HR		 1337#endif
1338
1da177e4
LT		 1339extern int ide_hwif_request_regions(ide_hwif_t *hwif);
1340extern void ide_hwif_release_regions(ide_hwif_t* hwif);
1341extern void ide_unregister (unsigned int index);
1342
1343void ide_register_region(struct gendisk *);
1344void ide_unregister_region(struct gendisk *);
1345
1346void ide_undecoded_slave(ide_hwif_t *);
1347
8447d9d5 1348int ide_device_add(u8 idx[4]);
1da177e4
LT		 1349
1350static inline void *ide_get_hwifdata (ide_hwif_t * hwif)
1351{
1352 return hwif->hwif_data;
1353}
1354
1355static inline void ide_set_hwifdata (ide_hwif_t * hwif, void *data)
1356{
1357 hwif->hwif_data = data;
1358}
1359
3ab7efe8 1360const char *ide_xfer_verbose(u8 mode);
1da177e4
LT		 1361extern void ide_toggle_bounce(ide_drive_t *drive, int on);
1362extern int ide_set_xfer_rate(ide_drive_t *drive, u8 rate);
1363
2229833c
BZ		 1364static inline int ide_dev_has_iordy(struct hd_driveid *id)
1365{
1366 return ((id->field_valid & 2) && (id->capability & 8)) ? 1 : 0;
1367}
1368
6c3c22f3
SS		 1369static inline int ide_dev_is_sata(struct hd_driveid *id)
1370{
1371 /*
1372 * See if word 93 is 0 AND drive is at least ATA-5 compatible
1373 * verifying that word 80 by casting it to a signed type --
1374 * this trick allows us to filter out the reserved values of
1375 * 0x0000 and 0xffff along with the earlier ATA revisions...
1376 */
1377 if (id->hw_config == 0 && (short)id->major_rev_num >= 0x0020)
1378 return 1;
1379 return 0;
1380}
1381
1da177e4
LT		 1382u8 ide_dump_status(ide_drive_t *, const char *, u8);
1383
1384typedef struct ide_pio_timings_s {
1385 int setup_time; /* Address setup (ns) minimum */
1386 int active_time; /* Active pulse (ns) minimum */
81d368e0
SS		 1387 int cycle_time; /* Cycle time (ns) minimum = */
1388 /* active + recovery (+ setup for some chips) */
1da177e4
LT		 1389} ide_pio_timings_t;
1390
7dd00083 1391unsigned int ide_pio_cycle_time(ide_drive_t *, u8);
2134758d 1392u8 ide_get_best_pio_mode(ide_drive_t *, u8, u8);
1da177e4
LT		 1393extern const ide_pio_timings_t ide_pio_timings[6];
1394
88b2b32b
BZ		 1395int ide_set_pio_mode(ide_drive_t *, u8);
1396int ide_set_dma_mode(ide_drive_t *, u8);
1397
26bcb879
BZ		 1398void ide_set_pio(ide_drive_t *, u8);
1399
1400static inline void ide_set_max_pio(ide_drive_t *drive)
1401{
1402 ide_set_pio(drive, 255);
1403}
1da177e4
LT		 1404
1405extern spinlock_t ide_lock;
ef29888e 1406extern struct mutex ide_cfg_mtx;
1da177e4
LT		 1407/*
1408 * Structure locking:
1409 *
ef29888e 1410 * ide_cfg_mtx and ide_lock together protect changes to
1da177e4
LT		 1411 * ide_hwif_t->{next,hwgroup}
1412 * ide_drive_t->next
1413 *
1414 * ide_hwgroup_t->busy: ide_lock
1415 * ide_hwgroup_t->hwif: ide_lock
1416 * ide_hwif_t->mate: constant, no locking
1417 * ide_drive_t->hwif: constant, no locking
1418 */
1419
366c7f55 1420#define local_irq_set(flags) do { local_save_flags((flags)); local_irq_enable_in_hardirq(); } while (0)
1da177e4
LT		 1421
1422extern struct bus_type ide_bus_type;
1423
1424/* check if CACHE FLUSH (EXT) command is supported (bits defined in ATA-6) */
1425#define ide_id_has_flush_cache(id) ((id)->cfs_enable_2 & 0x3000)
1426
1427/* some Maxtor disks have bit 13 defined incorrectly so check bit 10 too */
1428#define ide_id_has_flush_cache_ext(id) \
1429 (((id)->cfs_enable_2 & 0x2400) == 0x2400)
1430
86b37860
CL		 1431static inline int hwif_to_node(ide_hwif_t *hwif)
1432{
1433 struct pci_dev *dev = hwif->pci_dev;
1434 return dev ? pcibus_to_node(dev->bus) : -1;
1435}
1436
1b678347
BH		 1437static inline ide_drive_t *ide_get_paired_drive(ide_drive_t *drive)
1438{
1439 ide_hwif_t *hwif = HWIF(drive);
1440
1441 return &hwif->drives[(drive->dn ^ 1) & 1];
1442}
1443
1da177e4 1444#endif /* _IDE_H */
Linux kernel - Deliverables
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