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Linux v2.6.15-rc7
[pohmelfs.git] / include / linux / ide.h
blob7b6a6a58e465e950f6d53ab6422851d6a6c6f70f
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
9 #include <linux/config.h>
10 #include <linux/init.h>
11 #include <linux/ioport.h>
12 #include <linux/hdreg.h>
13 #include <linux/hdsmart.h>
14 #include <linux/blkdev.h>
15 #include <linux/proc_fs.h>
16 #include <linux/interrupt.h>
17 #include <linux/bitops.h>
18 #include <linux/bio.h>
19 #include <linux/device.h>
20 #include <linux/pci.h>
21 #include <asm/byteorder.h>
22 #include <asm/system.h>
23 #include <asm/io.h>
24 #include <asm/semaphore.h>
25
26 /******************************************************************************
27 * IDE driver configuration options (play with these as desired):
28 *
29 * REALLY_SLOW_IO can be defined in ide.c and ide-cd.c, if necessary
30 */
31 #define INITIAL_MULT_COUNT 0 /* off=0; on=2,4,8,16,32, etc.. */
32
33 #ifndef SUPPORT_SLOW_DATA_PORTS /* 1 to support slow data ports */
34 #define SUPPORT_SLOW_DATA_PORTS 1 /* 0 to reduce kernel size */
35 #endif
36 #ifndef SUPPORT_VLB_SYNC /* 1 to support weird 32-bit chips */
37 #define SUPPORT_VLB_SYNC 1 /* 0 to reduce kernel size */
38 #endif
39 #ifndef OK_TO_RESET_CONTROLLER /* 1 needed for good error recovery */
40 #define OK_TO_RESET_CONTROLLER 1 /* 0 for use with AH2372A/B interface */
41 #endif
42
43 #ifndef DISABLE_IRQ_NOSYNC
44 #define DISABLE_IRQ_NOSYNC 0
45 #endif
46
47 /*
48 * Used to indicate "no IRQ", should be a value that cannot be an IRQ
49 * number.
50 */
51
52 #define IDE_NO_IRQ (-1)
53
54 /*
55 * "No user-serviceable parts" beyond this point :)
56 *****************************************************************************/
57
58 typedef unsigned char byte; /* used everywhere */
59
60 /*
61 * Probably not wise to fiddle with these
62 */
63 #define ERROR_MAX 8 /* Max read/write errors per sector */
64 #define ERROR_RESET 3 /* Reset controller every 4th retry */
65 #define ERROR_RECAL 1 /* Recalibrate every 2nd retry */
66
67 /*
68 * Tune flags
69 */
70 #define IDE_TUNE_NOAUTO 2
71 #define IDE_TUNE_AUTO 1
72 #define IDE_TUNE_DEFAULT 0
73
74 /*
75 * state flags
76 */
77
78 #define DMA_PIO_RETRY 1 /* retrying in PIO */
79
80 #define HWIF(drive) ((ide_hwif_t *)((drive)->hwif))
81 #define HWGROUP(drive) ((ide_hwgroup_t *)(HWIF(drive)->hwgroup))
82
83 /*
84 * Definitions for accessing IDE controller registers
85 */
86 #define IDE_NR_PORTS (10)
87
88 #define IDE_DATA_OFFSET (0)
89 #define IDE_ERROR_OFFSET (1)
90 #define IDE_NSECTOR_OFFSET (2)
91 #define IDE_SECTOR_OFFSET (3)
92 #define IDE_LCYL_OFFSET (4)
93 #define IDE_HCYL_OFFSET (5)
94 #define IDE_SELECT_OFFSET (6)
95 #define IDE_STATUS_OFFSET (7)
96 #define IDE_CONTROL_OFFSET (8)
97 #define IDE_IRQ_OFFSET (9)
98
99 #define IDE_FEATURE_OFFSET IDE_ERROR_OFFSET
100 #define IDE_COMMAND_OFFSET IDE_STATUS_OFFSET
101
102 #define IDE_CONTROL_OFFSET_HOB (7)
103
104 #define IDE_DATA_REG (HWIF(drive)->io_ports[IDE_DATA_OFFSET])
105 #define IDE_ERROR_REG (HWIF(drive)->io_ports[IDE_ERROR_OFFSET])
106 #define IDE_NSECTOR_REG (HWIF(drive)->io_ports[IDE_NSECTOR_OFFSET])
107 #define IDE_SECTOR_REG (HWIF(drive)->io_ports[IDE_SECTOR_OFFSET])
108 #define IDE_LCYL_REG (HWIF(drive)->io_ports[IDE_LCYL_OFFSET])
109 #define IDE_HCYL_REG (HWIF(drive)->io_ports[IDE_HCYL_OFFSET])
110 #define IDE_SELECT_REG (HWIF(drive)->io_ports[IDE_SELECT_OFFSET])
111 #define IDE_STATUS_REG (HWIF(drive)->io_ports[IDE_STATUS_OFFSET])
112 #define IDE_CONTROL_REG (HWIF(drive)->io_ports[IDE_CONTROL_OFFSET])
113 #define IDE_IRQ_REG (HWIF(drive)->io_ports[IDE_IRQ_OFFSET])
114
115 #define IDE_FEATURE_REG IDE_ERROR_REG
116 #define IDE_COMMAND_REG IDE_STATUS_REG
117 #define IDE_ALTSTATUS_REG IDE_CONTROL_REG
118 #define IDE_IREASON_REG IDE_NSECTOR_REG
119 #define IDE_BCOUNTL_REG IDE_LCYL_REG
120 #define IDE_BCOUNTH_REG IDE_HCYL_REG
121
122 #define OK_STAT(stat,good,bad) (((stat)&((good)|(bad)))==(good))
123 #define BAD_R_STAT (BUSY_STAT | ERR_STAT)
124 #define BAD_W_STAT (BAD_R_STAT | WRERR_STAT)
125 #define BAD_STAT (BAD_R_STAT | DRQ_STAT)
126 #define DRIVE_READY (READY_STAT | SEEK_STAT)
127 #define DATA_READY (DRQ_STAT)
128
129 #define BAD_CRC (ABRT_ERR | ICRC_ERR)
130
131 #define SATA_NR_PORTS (3) /* 16 possible ?? */
132
133 #define SATA_STATUS_OFFSET (0)
134 #define SATA_STATUS_REG (HWIF(drive)->sata_scr[SATA_STATUS_OFFSET])
135 #define SATA_ERROR_OFFSET (1)
136 #define SATA_ERROR_REG (HWIF(drive)->sata_scr[SATA_ERROR_OFFSET])
137 #define SATA_CONTROL_OFFSET (2)
138 #define SATA_CONTROL_REG (HWIF(drive)->sata_scr[SATA_CONTROL_OFFSET])
139
140 #define SATA_MISC_OFFSET (0)
141 #define SATA_MISC_REG (HWIF(drive)->sata_misc[SATA_MISC_OFFSET])
142 #define SATA_PHY_OFFSET (1)
143 #define SATA_PHY_REG (HWIF(drive)->sata_misc[SATA_PHY_OFFSET])
144 #define SATA_IEN_OFFSET (2)
145 #define SATA_IEN_REG (HWIF(drive)->sata_misc[SATA_IEN_OFFSET])
146
147 /*
148 * Our Physical Region Descriptor (PRD) table should be large enough
149 * to handle the biggest I/O request we are likely to see. Since requests
150 * can have no more than 256 sectors, and since the typical blocksize is
151 * two or more sectors, we could get by with a limit of 128 entries here for
152 * the usual worst case. Most requests seem to include some contiguous blocks,
153 * further reducing the number of table entries required.
154 *
155 * The driver reverts to PIO mode for individual requests that exceed
156 * this limit (possible with 512 byte blocksizes, eg. MSDOS f/s), so handling
157 * 100% of all crazy scenarios here is not necessary.
158 *
159 * As it turns out though, we must allocate a full 4KB page for this,
160 * so the two PRD tables (ide0 & ide1) will each get half of that,
161 * allowing each to have about 256 entries (8 bytes each) from this.
162 */
163 #define PRD_BYTES 8
164 #define PRD_ENTRIES 256
165
166 /*
167 * Some more useful definitions
168 */
169 #define PARTN_BITS 6 /* number of minor dev bits for partitions */
170 #define MAX_DRIVES 2 /* per interface; 2 assumed by lots of code */
171 #define SECTOR_SIZE 512
172 #define SECTOR_WORDS (SECTOR_SIZE / 4) /* number of 32bit words per sector */
173 #define IDE_LARGE_SEEK(b1,b2,t) (((b1) > (b2) + (t)) || ((b2) > (b1) + (t)))
174
175 /*
176 * Timeouts for various operations:
177 */
178 #define WAIT_DRQ (HZ/10) /* 100msec - spec allows up to 20ms */
179 #define WAIT_READY (5*HZ) /* 5sec - some laptops are very slow */
180 #define WAIT_PIDENTIFY (10*HZ) /* 10sec - should be less than 3ms (?), if all ATAPI CD is closed at boot */
181 #define WAIT_WORSTCASE (30*HZ) /* 30sec - worst case when spinning up */
182 #define WAIT_CMD (10*HZ) /* 10sec - maximum wait for an IRQ to happen */
183 #define WAIT_MIN_SLEEP (2*HZ/100) /* 20msec - minimum sleep time */
184
185 /*
186 * Check for an interrupt and acknowledge the interrupt status
187 */
188 struct hwif_s;
189 typedef int (ide_ack_intr_t)(struct hwif_s *);
190
191 #ifndef NO_DMA
192 #define NO_DMA 255
193 #endif
194
195 /*
196 * hwif_chipset_t is used to keep track of the specific hardware
197 * chipset used by each IDE interface, if known.
198 */
199 typedef enum { ide_unknown, ide_generic, ide_pci,
200 ide_cmd640, ide_dtc2278, ide_ali14xx,
201 ide_qd65xx, ide_umc8672, ide_ht6560b,
202 ide_rz1000, ide_trm290,
203 ide_cmd646, ide_cy82c693, ide_4drives,
204 ide_pmac, ide_etrax100, ide_acorn,
205 ide_au1xxx, ide_forced
206 } hwif_chipset_t;
207
208 /*
209 * Structure to hold all information about the location of this port
210 */
211 typedef struct hw_regs_s {
212 unsigned long io_ports[IDE_NR_PORTS]; /* task file registers */
213 int irq; /* our irq number */
214 int dma; /* our dma entry */
215 ide_ack_intr_t *ack_intr; /* acknowledge interrupt */
216 hwif_chipset_t chipset;
217 struct device *dev;
218 } hw_regs_t;
219
220 /*
221 * Register new hardware with ide
222 */
223 int ide_register_hw(hw_regs_t *hw, struct hwif_s **hwifp);
224 int ide_register_hw_with_fixup(hw_regs_t *, struct hwif_s **, void (*)(struct hwif_s *));
225
226 /*
227 * Set up hw_regs_t structure before calling ide_register_hw (optional)
228 */
229 void ide_setup_ports( hw_regs_t *hw,
230 unsigned long base,
231 int *offsets,
232 unsigned long ctrl,
233 unsigned long intr,
234 ide_ack_intr_t *ack_intr,
235 #if 0
236 ide_io_ops_t *iops,
237 #endif
238 int irq);
239
240 static inline void ide_std_init_ports(hw_regs_t *hw,
241 unsigned long io_addr,
242 unsigned long ctl_addr)
243 {
244 unsigned int i;
245
246 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
247 hw->io_ports[i] = io_addr++;
248
249 hw->io_ports[IDE_CONTROL_OFFSET] = ctl_addr;
250 }
251
252 #include <asm/ide.h>
253
254 #ifndef MAX_HWIFS
255 #define MAX_HWIFS CONFIG_IDE_MAX_HWIFS
256 #endif
257
258 /* needed on alpha, x86/x86_64, ia64, mips, ppc32 and sh */
259 #ifndef IDE_ARCH_OBSOLETE_DEFAULTS
260 # define ide_default_io_base(index) (0)
261 # define ide_default_irq(base) (0)
262 # define ide_init_default_irq(base) (0)
263 #endif
264
265 /*
266 * ide_init_hwif_ports() is OBSOLETE and will be removed in 2.7 series.
267 * New ports shouldn't define IDE_ARCH_OBSOLETE_INIT in <asm/ide.h>.
268 */
269 #ifdef IDE_ARCH_OBSOLETE_INIT
270 static inline void ide_init_hwif_ports(hw_regs_t *hw,
271 unsigned long io_addr,
272 unsigned long ctl_addr,
273 int *irq)
274 {
275 if (!ctl_addr)
276 ide_std_init_ports(hw, io_addr, ide_default_io_ctl(io_addr));
277 else
278 ide_std_init_ports(hw, io_addr, ctl_addr);
279
280 if (irq)
281 *irq = 0;
282
283 hw->io_ports[IDE_IRQ_OFFSET] = 0;
284
285 #ifdef CONFIG_PPC32
286 if (ppc_ide_md.ide_init_hwif)
287 ppc_ide_md.ide_init_hwif(hw, io_addr, ctl_addr, irq);
288 #endif
289 }
290 #else
291 static inline void ide_init_hwif_ports(hw_regs_t *hw,
292 unsigned long io_addr,
293 unsigned long ctl_addr,
294 int *irq)
295 {
296 if (io_addr || ctl_addr)
297 printk(KERN_WARNING "%s: must not be called\n", __FUNCTION__);
298 }
299 #endif /* IDE_ARCH_OBSOLETE_INIT */
300
301 /* Currently only m68k, apus and m8xx need it */
302 #ifndef IDE_ARCH_ACK_INTR
303 # define ide_ack_intr(hwif) (1)
304 #endif
305
306 /* Currently only Atari needs it */
307 #ifndef IDE_ARCH_LOCK
308 # define ide_release_lock() do {} while (0)
309 # define ide_get_lock(hdlr, data) do {} while (0)
310 #endif /* IDE_ARCH_LOCK */
311
312 /*
313 * Now for the data we need to maintain per-drive: ide_drive_t
314 */
315
316 #define ide_scsi 0x21
317 #define ide_disk 0x20
318 #define ide_optical 0x7
319 #define ide_cdrom 0x5
320 #define ide_tape 0x1
321 #define ide_floppy 0x0
322
323 /*
324 * Special Driver Flags
325 *
326 * set_geometry : respecify drive geometry
327 * recalibrate : seek to cyl 0
328 * set_multmode : set multmode count
329 * set_tune : tune interface for drive
330 * serviced : service command
331 * reserved : unused
332 */
333 typedef union {
334 unsigned all : 8;
335 struct {
336 #if defined(__LITTLE_ENDIAN_BITFIELD)
337 unsigned set_geometry : 1;
338 unsigned recalibrate : 1;
339 unsigned set_multmode : 1;
340 unsigned set_tune : 1;
341 unsigned serviced : 1;
342 unsigned reserved : 3;
343 #elif defined(__BIG_ENDIAN_BITFIELD)
344 unsigned reserved : 3;
345 unsigned serviced : 1;
346 unsigned set_tune : 1;
347 unsigned set_multmode : 1;
348 unsigned recalibrate : 1;
349 unsigned set_geometry : 1;
350 #else
351 #error "Please fix <asm/byteorder.h>"
352 #endif
353 } b;
354 } special_t;
355
356 /*
357 * ATA DATA Register Special.
358 * ATA NSECTOR Count Register().
359 * ATAPI Byte Count Register.
360 * Channel index ordering pairs.
361 */
362 typedef union {
363 unsigned all :16;
364 struct {
365 #if defined(__LITTLE_ENDIAN_BITFIELD)
366 unsigned low :8; /* LSB */
367 unsigned high :8; /* MSB */
368 #elif defined(__BIG_ENDIAN_BITFIELD)
369 unsigned high :8; /* MSB */
370 unsigned low :8; /* LSB */
371 #else
372 #error "Please fix <asm/byteorder.h>"
373 #endif
374 } b;
375 } ata_nsector_t, ata_data_t, atapi_bcount_t, ata_index_t;
376
377 /*
378 * ATA-IDE Select Register, aka Device-Head
379 *
380 * head : always zeros here
381 * unit : drive select number: 0/1
382 * bit5 : always 1
383 * lba : using LBA instead of CHS
384 * bit7 : always 1
385 */
386 typedef union {
387 unsigned all : 8;
388 struct {
389 #if defined(__LITTLE_ENDIAN_BITFIELD)
390 unsigned head : 4;
391 unsigned unit : 1;
392 unsigned bit5 : 1;
393 unsigned lba : 1;
394 unsigned bit7 : 1;
395 #elif defined(__BIG_ENDIAN_BITFIELD)
396 unsigned bit7 : 1;
397 unsigned lba : 1;
398 unsigned bit5 : 1;
399 unsigned unit : 1;
400 unsigned head : 4;
401 #else
402 #error "Please fix <asm/byteorder.h>"
403 #endif
404 } b;
405 } select_t, ata_select_t;
406
407 /*
408 * The ATA-IDE Status Register.
409 * The ATAPI Status Register.
410 *
411 * check : Error occurred
412 * idx : Index Error
413 * corr : Correctable error occurred
414 * drq : Data is request by the device
415 * dsc : Disk Seek Complete : ata
416 * : Media access command finished : atapi
417 * df : Device Fault : ata
418 * : Reserved : atapi
419 * drdy : Ready, Command Mode Capable : ata
420 * : Ignored for ATAPI commands : atapi
421 * bsy : Disk is Busy
422 * : The device has access to the command block
423 */
424 typedef union {
425 unsigned all :8;
426 struct {
427 #if defined(__LITTLE_ENDIAN_BITFIELD)
428 unsigned check :1;
429 unsigned idx :1;
430 unsigned corr :1;
431 unsigned drq :1;
432 unsigned dsc :1;
433 unsigned df :1;
434 unsigned drdy :1;
435 unsigned bsy :1;
436 #elif defined(__BIG_ENDIAN_BITFIELD)
437 unsigned bsy :1;
438 unsigned drdy :1;
439 unsigned df :1;
440 unsigned dsc :1;
441 unsigned drq :1;
442 unsigned corr :1;
443 unsigned idx :1;
444 unsigned check :1;
445 #else
446 #error "Please fix <asm/byteorder.h>"
447 #endif
448 } b;
449 } ata_status_t, atapi_status_t;
450
451 /*
452 * ATAPI Feature Register
453 *
454 * dma : Using DMA or PIO
455 * reserved321 : Reserved
456 * reserved654 : Reserved (Tag Type)
457 * reserved7 : Reserved
458 */
459 typedef union {
460 unsigned all :8;
461 struct {
462 #if defined(__LITTLE_ENDIAN_BITFIELD)
463 unsigned dma :1;
464 unsigned reserved321 :3;
465 unsigned reserved654 :3;
466 unsigned reserved7 :1;
467 #elif defined(__BIG_ENDIAN_BITFIELD)
468 unsigned reserved7 :1;
469 unsigned reserved654 :3;
470 unsigned reserved321 :3;
471 unsigned dma :1;
472 #else
473 #error "Please fix <asm/byteorder.h>"
474 #endif
475 } b;
476 } atapi_feature_t;
477
478 /*
479 * ATAPI Interrupt Reason Register.
480 *
481 * cod : Information transferred is command (1) or data (0)
482 * io : The device requests us to read (1) or write (0)
483 * reserved : Reserved
484 */
485 typedef union {
486 unsigned all :8;
487 struct {
488 #if defined(__LITTLE_ENDIAN_BITFIELD)
489 unsigned cod :1;
490 unsigned io :1;
491 unsigned reserved :6;
492 #elif defined(__BIG_ENDIAN_BITFIELD)
493 unsigned reserved :6;
494 unsigned io :1;
495 unsigned cod :1;
496 #else
497 #error "Please fix <asm/byteorder.h>"
498 #endif
499 } b;
500 } atapi_ireason_t;
501
502 /*
503 * The ATAPI error register.
504 *
505 * ili : Illegal Length Indication
506 * eom : End Of Media Detected
507 * abrt : Aborted command - As defined by ATA
508 * mcr : Media Change Requested - As defined by ATA
509 * sense_key : Sense key of the last failed packet command
510 */
511 typedef union {
512 unsigned all :8;
513 struct {
514 #if defined(__LITTLE_ENDIAN_BITFIELD)
515 unsigned ili :1;
516 unsigned eom :1;
517 unsigned abrt :1;
518 unsigned mcr :1;
519 unsigned sense_key :4;
520 #elif defined(__BIG_ENDIAN_BITFIELD)
521 unsigned sense_key :4;
522 unsigned mcr :1;
523 unsigned abrt :1;
524 unsigned eom :1;
525 unsigned ili :1;
526 #else
527 #error "Please fix <asm/byteorder.h>"
528 #endif
529 } b;
530 } atapi_error_t;
531
532 /*
533 * Status returned from various ide_ functions
534 */
535 typedef enum {
536 ide_stopped, /* no drive operation was started */
537 ide_started, /* a drive operation was started, handler was set */
538 } ide_startstop_t;
539
540 struct ide_driver_s;
541 struct ide_settings_s;
542
543 typedef struct ide_drive_s {
544 char name[4]; /* drive name, such as "hda" */
545 char driver_req[10]; /* requests specific driver */
546
547 request_queue_t *queue; /* request queue */
548
549 struct request *rq; /* current request */
550 struct ide_drive_s *next; /* circular list of hwgroup drives */
551 void *driver_data; /* extra driver data */
552 struct hd_driveid *id; /* drive model identification info */
553 struct proc_dir_entry *proc; /* /proc/ide/ directory entry */
554 struct ide_settings_s *settings;/* /proc/ide/ drive settings */
555 char devfs_name[64]; /* devfs crap */
556
557 struct hwif_s *hwif; /* actually (ide_hwif_t *) */
558
559 unsigned long sleep; /* sleep until this time */
560 unsigned long service_start; /* time we started last request */
561 unsigned long service_time; /* service time of last request */
562 unsigned long timeout; /* max time to wait for irq */
563
564 special_t special; /* special action flags */
565 select_t select; /* basic drive/head select reg value */
566
567 u8 keep_settings; /* restore settings after drive reset */
568 u8 autodma; /* device can safely use dma on host */
569 u8 using_dma; /* disk is using dma for read/write */
570 u8 retry_pio; /* retrying dma capable host in pio */
571 u8 state; /* retry state */
572 u8 waiting_for_dma; /* dma currently in progress */
573 u8 unmask; /* okay to unmask other irqs */
574 u8 bswap; /* byte swap data */
575 u8 dsc_overlap; /* DSC overlap */
576 u8 nice1; /* give potential excess bandwidth */
577
578 unsigned present : 1; /* drive is physically present */
579 unsigned dead : 1; /* device ejected hint */
580 unsigned id_read : 1; /* 1=id read from disk 0 = synthetic */
581 unsigned noprobe : 1; /* from: hdx=noprobe */
582 unsigned removable : 1; /* 1 if need to do check_media_change */
583 unsigned attach : 1; /* needed for removable devices */
584 unsigned is_flash : 1; /* 1 if probed as flash */
585 unsigned forced_geom : 1; /* 1 if hdx=c,h,s was given at boot */
586 unsigned no_unmask : 1; /* disallow setting unmask bit */
587 unsigned no_io_32bit : 1; /* disallow enabling 32bit I/O */
588 unsigned atapi_overlap : 1; /* ATAPI overlap (not supported) */
589 unsigned nice0 : 1; /* give obvious excess bandwidth */
590 unsigned nice2 : 1; /* give a share in our own bandwidth */
591 unsigned doorlocking : 1; /* for removable only: door lock/unlock works */
592 unsigned autotune : 2; /* 0=default, 1=autotune, 2=noautotune */
593 unsigned remap_0_to_1 : 1; /* 0=noremap, 1=remap 0->1 (for EZDrive) */
594 unsigned blocked : 1; /* 1=powermanagment told us not to do anything, so sleep nicely */
595 unsigned vdma : 1; /* 1=doing PIO over DMA 0=doing normal DMA */
596 unsigned addressing; /* : 3;
597 * 0=28-bit
598 * 1=48-bit
599 * 2=48-bit doing 28-bit
600 * 3=64-bit
601 */
602 unsigned scsi : 1; /* 0=default, 1=ide-scsi emulation */
603 unsigned sleeping : 1; /* 1=sleeping & sleep field valid */
604 unsigned post_reset : 1;
605
606 u8 quirk_list; /* considered quirky, set for a specific host */
607 u8 init_speed; /* transfer rate set at boot */
608 u8 pio_speed; /* unused by core, used by some drivers for fallback from DMA */
609 u8 current_speed; /* current transfer rate set */
610 u8 dn; /* now wide spread use */
611 u8 wcache; /* status of write cache */
612 u8 acoustic; /* acoustic management */
613 u8 media; /* disk, cdrom, tape, floppy, ... */
614 u8 ctl; /* "normal" value for IDE_CONTROL_REG */
615 u8 ready_stat; /* min status value for drive ready */
616 u8 mult_count; /* current multiple sector setting */
617 u8 mult_req; /* requested multiple sector setting */
618 u8 tune_req; /* requested drive tuning setting */
619 u8 io_32bit; /* 0=16-bit, 1=32-bit, 2/3=32bit+sync */
620 u8 bad_wstat; /* used for ignoring WRERR_STAT */
621 u8 nowerr; /* used for ignoring WRERR_STAT */
622 u8 sect0; /* offset of first sector for DM6:DDO */
623 u8 head; /* "real" number of heads */
624 u8 sect; /* "real" sectors per track */
625 u8 bios_head; /* BIOS/fdisk/LILO number of heads */
626 u8 bios_sect; /* BIOS/fdisk/LILO sectors per track */
627
628 unsigned int bios_cyl; /* BIOS/fdisk/LILO number of cyls */
629 unsigned int cyl; /* "real" number of cyls */
630 unsigned int drive_data; /* use by tuneproc/selectproc */
631 unsigned int usage; /* current "open()" count for drive */
632 unsigned int failures; /* current failure count */
633 unsigned int max_failures; /* maximum allowed failure count */
634
635 u64 capacity64; /* total number of sectors */
636
637 int lun; /* logical unit */
638 int crc_count; /* crc counter to reduce drive speed */
639 struct list_head list;
640 struct device gendev;
641 struct semaphore gendev_rel_sem; /* to deal with device release() */
642 } ide_drive_t;
643
644 #define to_ide_device(dev)container_of(dev, ide_drive_t, gendev)
645
646 #define IDE_CHIPSET_PCI_MASK \
647 ((1<<ide_pci)|(1<<ide_cmd646)|(1<<ide_ali14xx))
648 #define IDE_CHIPSET_IS_PCI(c) ((IDE_CHIPSET_PCI_MASK >> (c)) & 1)
649
650 struct ide_pci_device_s;
651
652 typedef struct hwif_s {
653 struct hwif_s *next; /* for linked-list in ide_hwgroup_t */
654 struct hwif_s *mate; /* other hwif from same PCI chip */
655 struct hwgroup_s *hwgroup; /* actually (ide_hwgroup_t *) */
656 struct proc_dir_entry *proc; /* /proc/ide/ directory entry */
657
658 char name[6]; /* name of interface, eg. "ide0" */
659
660 /* task file registers for pata and sata */
661 unsigned long io_ports[IDE_NR_PORTS];
662 unsigned long sata_scr[SATA_NR_PORTS];
663 unsigned long sata_misc[SATA_NR_PORTS];
664
665 hw_regs_t hw; /* Hardware info */
666 ide_drive_t drives[MAX_DRIVES]; /* drive info */
667
668 u8 major; /* our major number */
669 u8 index; /* 0 for ide0; 1 for ide1; ... */
670 u8 channel; /* for dual-port chips: 0=primary, 1=secondary */
671 u8 straight8; /* Alan's straight 8 check */
672 u8 bus_state; /* power state of the IDE bus */
673
674 u8 atapi_dma; /* host supports atapi_dma */
675 u8 ultra_mask;
676 u8 mwdma_mask;
677 u8 swdma_mask;
678
679 hwif_chipset_t chipset; /* sub-module for tuning.. */
680
681 struct pci_dev *pci_dev; /* for pci chipsets */
682 struct ide_pci_device_s *cds; /* chipset device struct */
683
684 void (*rw_disk)(ide_drive_t *, struct request *);
685
686 #if 0
687 ide_hwif_ops_t *hwifops;
688 #else
689 /* routine to tune PIO mode for drives */
690 void (*tuneproc)(ide_drive_t *, u8);
691 /* routine to retune DMA modes for drives */
692 int (*speedproc)(ide_drive_t *, u8);
693 /* tweaks hardware to select drive */
694 void (*selectproc)(ide_drive_t *);
695 /* chipset polling based on hba specifics */
696 int (*reset_poll)(ide_drive_t *);
697 /* chipset specific changes to default for device-hba resets */
698 void (*pre_reset)(ide_drive_t *);
699 /* routine to reset controller after a disk reset */
700 void (*resetproc)(ide_drive_t *);
701 /* special interrupt handling for shared pci interrupts */
702 void (*intrproc)(ide_drive_t *);
703 /* special host masking for drive selection */
704 void (*maskproc)(ide_drive_t *, int);
705 /* check host's drive quirk list */
706 int (*quirkproc)(ide_drive_t *);
707 /* driver soft-power interface */
708 int (*busproc)(ide_drive_t *, int);
709 // /* host rate limiter */
710 // u8 (*ratemask)(ide_drive_t *);
711 // /* device rate limiter */
712 // u8 (*ratefilter)(ide_drive_t *, u8);
713 #endif
714
715 void (*ata_input_data)(ide_drive_t *, void *, u32);
716 void (*ata_output_data)(ide_drive_t *, void *, u32);
717
718 void (*atapi_input_bytes)(ide_drive_t *, void *, u32);
719 void (*atapi_output_bytes)(ide_drive_t *, void *, u32);
720
721 int (*dma_setup)(ide_drive_t *);
722 void (*dma_exec_cmd)(ide_drive_t *, u8);
723 void (*dma_start)(ide_drive_t *);
724 int (*ide_dma_end)(ide_drive_t *drive);
725 int (*ide_dma_check)(ide_drive_t *drive);
726 int (*ide_dma_on)(ide_drive_t *drive);
727 int (*ide_dma_off_quietly)(ide_drive_t *drive);
728 int (*ide_dma_test_irq)(ide_drive_t *drive);
729 int (*ide_dma_host_on)(ide_drive_t *drive);
730 int (*ide_dma_host_off)(ide_drive_t *drive);
731 int (*ide_dma_lostirq)(ide_drive_t *drive);
732 int (*ide_dma_timeout)(ide_drive_t *drive);
733
734 void (*OUTB)(u8 addr, unsigned long port);
735 void (*OUTBSYNC)(ide_drive_t *drive, u8 addr, unsigned long port);
736 void (*OUTW)(u16 addr, unsigned long port);
737 void (*OUTL)(u32 addr, unsigned long port);
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);
743 u32 (*INL)(unsigned long port);
744 void (*INSW)(unsigned long port, void *addr, u32 count);
745 void (*INSL)(unsigned long port, void *addr, u32 count);
746
747 /* dma physical region descriptor table (cpu view) */
748 unsigned int *dmatable_cpu;
749 /* dma physical region descriptor table (dma view) */
750 dma_addr_t dmatable_dma;
751 /* Scatter-gather list used to build the above */
752 struct scatterlist *sg_table;
753 int sg_max_nents; /* Maximum number of entries in it */
754 int sg_nents; /* Current number of entries in it */
755 int sg_dma_direction; /* dma transfer direction */
756
757 /* data phase of the active command (currently only valid for PIO/DMA) */
758 int data_phase;
759
760 unsigned int nsect;
761 unsigned int nleft;
762 unsigned int cursg;
763 unsigned int cursg_ofs;
764
765 int mmio; /* hosts iomio (0) or custom (2) select */
766 int rqsize; /* max sectors per request */
767 int irq; /* our irq number */
768
769 unsigned long dma_master; /* reference base addr dmabase */
770 unsigned long dma_base; /* base addr for dma ports */
771 unsigned long dma_command; /* dma command register */
772 unsigned long dma_vendor1; /* dma vendor 1 register */
773 unsigned long dma_status; /* dma status register */
774 unsigned long dma_vendor3; /* dma vendor 3 register */
775 unsigned long dma_prdtable; /* actual prd table address */
776 unsigned long dma_base2; /* extended base addr for dma ports */
777
778 unsigned dma_extra; /* extra addr for dma ports */
779 unsigned long config_data; /* for use by chipset-specific code */
780 unsigned long select_data; /* for use by chipset-specific code */
781
782 unsigned noprobe : 1; /* don't probe for this interface */
783 unsigned present : 1; /* this interface exists */
784 unsigned hold : 1; /* this interface is always present */
785 unsigned serialized : 1; /* serialized all channel operation */
786 unsigned sharing_irq: 1; /* 1 = sharing irq with another hwif */
787 unsigned reset : 1; /* reset after probe */
788 unsigned autodma : 1; /* auto-attempt using DMA at boot */
789 unsigned udma_four : 1; /* 1=ATA-66 capable, 0=default */
790 unsigned no_lba48 : 1; /* 1 = cannot do LBA48 */
791 unsigned no_lba48_dma : 1; /* 1 = cannot do LBA48 DMA */
792 unsigned no_dsc : 1; /* 0 default, 1 dsc_overlap disabled */
793 unsigned auto_poll : 1; /* supports nop auto-poll */
794 unsigned sg_mapped : 1; /* sg_table and sg_nents are ready */
795
796 struct device gendev;
797 struct semaphore gendev_rel_sem; /* To deal with device release() */
798
799 void *hwif_data; /* extra hwif data */
800
801 unsigned dma;
802
803 void (*led_act)(void *data, int rw);
804 } ____cacheline_maxaligned_in_smp ide_hwif_t;
805
806 /*
807 * internal ide interrupt handler type
808 */
809 typedef ide_startstop_t (ide_pre_handler_t)(ide_drive_t *, struct request *);
810 typedef ide_startstop_t (ide_handler_t)(ide_drive_t *);
811 typedef int (ide_expiry_t)(ide_drive_t *);
812
813 typedef struct hwgroup_s {
814 /* irq handler, if active */
815 ide_startstop_t (*handler)(ide_drive_t *);
816 /* irq handler, suspended if active */
817 ide_startstop_t (*handler_save)(ide_drive_t *);
818 /* BOOL: protects all fields below */
819 volatile int busy;
820 /* BOOL: wake us up on timer expiry */
821 unsigned int sleeping : 1;
822 /* BOOL: polling active & poll_timeout field valid */
823 unsigned int polling : 1;
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;
831 /* chipset device struct */
832 struct ide_pci_device_s *cds;
833
834 /* current request */
835 struct request *rq;
836 /* failsafe timer */
837 struct timer_list timer;
838 /* local copy of current write rq */
839 struct request wrq;
840 /* timeout value during long polls */
841 unsigned long poll_timeout;
842 /* queried upon timeouts */
843 int (*expiry)(ide_drive_t *);
844 /* ide_system_bus_speed */
845 int pio_clock;
846
847 unsigned char cmd_buf[4];
848 } ide_hwgroup_t;
849
850 /* structure attached to the request for IDE_TASK_CMDS */
851
852 /*
853 * configurable drive settings
854 */
855
856 #define TYPE_INT 0
857 #define TYPE_INTA 1
858 #define TYPE_BYTE 2
859 #define TYPE_SHORT 3
860
861 #define SETTING_READ (1 << 0)
862 #define SETTING_WRITE (1 << 1)
863 #define SETTING_RW (SETTING_READ | SETTING_WRITE)
864
865 typedef int (ide_procset_t)(ide_drive_t *, int);
866 typedef struct ide_settings_s {
867 char *name;
868 int rw;
869 int read_ioctl;
870 int write_ioctl;
871 int data_type;
872 int min;
873 int max;
874 int mul_factor;
875 int div_factor;
876 void *data;
877 ide_procset_t *set;
878 int auto_remove;
879 struct ide_settings_s *next;
880 } ide_settings_t;
881
882 extern struct semaphore ide_setting_sem;
883 extern int ide_add_setting(ide_drive_t *drive, const char *name, int rw, int read_ioctl, int write_ioctl, int data_type, int min, int max, int mul_factor, int div_factor, void *data, ide_procset_t *set);
884 extern ide_settings_t *ide_find_setting_by_name(ide_drive_t *drive, char *name);
885 extern int ide_read_setting(ide_drive_t *t, ide_settings_t *setting);
886 extern int ide_write_setting(ide_drive_t *drive, ide_settings_t *setting, int val);
887 extern void ide_add_generic_settings(ide_drive_t *drive);
888
889 /*
890 * /proc/ide interface
891 */
892 typedef struct {
893 const char *name;
894 mode_t mode;
895 read_proc_t *read_proc;
896 write_proc_t *write_proc;
897 } ide_proc_entry_t;
898
899 #ifdef CONFIG_PROC_FS
900 extern struct proc_dir_entry *proc_ide_root;
901
902 extern void proc_ide_create(void);
903 extern void proc_ide_destroy(void);
904 extern void create_proc_ide_interfaces(void);
905 void destroy_proc_ide_interface(ide_hwif_t *);
906 extern void ide_add_proc_entries(struct proc_dir_entry *, ide_proc_entry_t *, void *);
907 extern void ide_remove_proc_entries(struct proc_dir_entry *, ide_proc_entry_t *);
908 read_proc_t proc_ide_read_capacity;
909 read_proc_t proc_ide_read_geometry;
910
911 #ifdef CONFIG_BLK_DEV_IDEPCI
912 void ide_pci_create_host_proc(const char *, get_info_t *);
913 #endif
914
915 /*
916 * Standard exit stuff:
917 */
918 #define PROC_IDE_READ_RETURN(page,start,off,count,eof,len) \
919 { \
920 len -= off; \
921 if (len < count) { \
922 *eof = 1; \
923 if (len <= 0) \
924 return 0; \
925 } else \
926 len = count; \
927 *start = page + off; \
928 return len; \
929 }
930 #else
931 static inline void create_proc_ide_interfaces(void) { ; }
932 static inline void destroy_proc_ide_interface(ide_hwif_t *hwif) { ; }
933 #define PROC_IDE_READ_RETURN(page,start,off,count,eof,len) return 0;
934 #endif
935
936 /*
937 * Power Management step value (rq->pm->pm_step).
938 *
939 * The step value starts at 0 (ide_pm_state_start_suspend) for a
940 * suspend operation or 1000 (ide_pm_state_start_resume) for a
941 * resume operation.
942 *
943 * For each step, the core calls the subdriver start_power_step() first.
944 * This can return:
945 * - ide_stopped : In this case, the core calls us back again unless
946 * step have been set to ide_power_state_completed.
947 * - ide_started : In this case, the channel is left busy until an
948 * async event (interrupt) occurs.
949 * Typically, start_power_step() will issue a taskfile request with
950 * do_rw_taskfile().
951 *
952 * Upon reception of the interrupt, the core will call complete_power_step()
953 * with the error code if any. This routine should update the step value
954 * and return. It should not start a new request. The core will call
955 * start_power_step for the new step value, unless step have been set to
956 * ide_power_state_completed.
957 *
958 * Subdrivers are expected to define their own additional power
959 * steps from 1..999 for suspend and from 1001..1999 for resume,
960 * other values are reserved for future use.
961 */
962
963 enum {
964 ide_pm_state_completed = -1,
965 ide_pm_state_start_suspend = 0,
966 ide_pm_state_start_resume = 1000,
967 };
968
969 /*
970 * Subdrivers support.
971 *
972 * The gendriver.owner field should be set to the module owner of this driver.
973 * The gendriver.name field should be set to the name of this driver
974 */
975 typedef struct ide_driver_s {
976 const char *version;
977 u8 media;
978 unsigned supports_dsc_overlap : 1;
979 ide_startstop_t (*do_request)(ide_drive_t *, struct request *, sector_t);
980 int (*end_request)(ide_drive_t *, int, int);
981 ide_startstop_t (*error)(ide_drive_t *, struct request *rq, u8, u8);
982 ide_startstop_t (*abort)(ide_drive_t *, struct request *rq);
983 ide_proc_entry_t *proc;
984 struct device_driver gen_driver;
985 } ide_driver_t;
986
987 int generic_ide_ioctl(ide_drive_t *, struct file *, struct block_device *, unsigned, unsigned long);
988
989 /*
990 * ide_hwifs[] is the master data structure used to keep track
991 * of just about everything in ide.c. Whenever possible, routines
992 * should be using pointers to a drive (ide_drive_t *) or
993 * pointers to a hwif (ide_hwif_t *), rather than indexing this
994 * structure directly (the allocation/layout may change!).
995 *
996 */
997 #ifndef _IDE_C
998 extern ide_hwif_t ide_hwifs[]; /* master data repository */
999 #endif
1000 extern int noautodma;
1001
1002 extern int ide_end_request (ide_drive_t *drive, int uptodate, int nrsecs);
1003 extern int __ide_end_request (ide_drive_t *drive, struct request *rq, int uptodate, int nrsecs);
1004
1005 /*
1006 * This is used on exit from the driver to designate the next irq handler
1007 * and also to start the safety timer.
1008 */
1009 extern void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler, unsigned int timeout, ide_expiry_t *expiry);
1010
1011 /*
1012 * This is used on exit from the driver to designate the next irq handler
1013 * and start the safety time safely and atomically from the IRQ handler
1014 * with respect to the command issue (which it also does)
1015 */
1016 extern void ide_execute_command(ide_drive_t *, task_ioreg_t cmd, ide_handler_t *, unsigned int, ide_expiry_t *);
1017
1018 ide_startstop_t __ide_error(ide_drive_t *, struct request *, u8, u8);
1019
1020 /*
1021 * ide_error() takes action based on the error returned by the controller.
1022 * The caller should return immediately after invoking this.
1023 *
1024 * (drive, msg, status)
1025 */
1026 ide_startstop_t ide_error (ide_drive_t *drive, const char *msg, byte stat);
1027
1028 ide_startstop_t __ide_abort(ide_drive_t *, struct request *);
1029
1030 /*
1031 * Abort a running command on the controller triggering the abort
1032 * from a host side, non error situation
1033 * (drive, msg)
1034 */
1035 extern ide_startstop_t ide_abort(ide_drive_t *, const char *);
1036
1037 extern void ide_fix_driveid(struct hd_driveid *);
1038 /*
1039 * ide_fixstring() cleans up and (optionally) byte-swaps a text string,
1040 * removing leading/trailing blanks and compressing internal blanks.
1041 * It is primarily used to tidy up the model name/number fields as
1042 * returned by the WIN_[P]IDENTIFY commands.
1043 *
1044 * (s, bytecount, byteswap)
1045 */
1046 extern void ide_fixstring(u8 *, const int, const int);
1047
1048 /*
1049 * This routine busy-waits for the drive status to be not "busy".
1050 * It then checks the status for all of the "good" bits and none
1051 * of the "bad" bits, and if all is okay it returns 0. All other
1052 * cases return 1 after doing "*startstop = ide_error()", and the
1053 * caller should return the updated value of "startstop" in this case.
1054 * "startstop" is unchanged when the function returns 0;
1055 * (startstop, drive, good, bad, timeout)
1056 */
1057 extern int ide_wait_stat(ide_startstop_t *, ide_drive_t *, u8, u8, unsigned long);
1058
1059 /*
1060 * Start a reset operation for an IDE interface.
1061 * The caller should return immediately after invoking this.
1062 */
1063 extern ide_startstop_t ide_do_reset (ide_drive_t *);
1064
1065 /*
1066 * This function is intended to be used prior to invoking ide_do_drive_cmd().
1067 */
1068 extern void ide_init_drive_cmd (struct request *rq);
1069
1070 /*
1071 * this function returns error location sector offset in case of a write error
1072 */
1073 extern u64 ide_get_error_location(ide_drive_t *, char *);
1074
1075 /*
1076 * "action" parameter type for ide_do_drive_cmd() below.
1077 */
1078 typedef enum {
1079 ide_wait, /* insert rq at end of list, and wait for it */
1080 ide_preempt, /* insert rq in front of current request */
1081 ide_head_wait, /* insert rq in front of current request and wait for it */
1082 ide_end /* insert rq at end of list, but don't wait for it */
1083 } ide_action_t;
1084
1085 extern int ide_do_drive_cmd(ide_drive_t *, struct request *, ide_action_t);
1086
1087 /*
1088 * Clean up after success/failure of an explicit drive cmd.
1089 * stat/err are used only when (HWGROUP(drive)->rq->cmd == IDE_DRIVE_CMD).
1090 * stat/err are used only when (HWGROUP(drive)->rq->cmd == IDE_DRIVE_TASK_MASK).
1091 *
1092 * (ide_drive_t *drive, u8 stat, u8 err)
1093 */
1094 extern void ide_end_drive_cmd(ide_drive_t *, u8, u8);
1095
1096 /*
1097 * Issue ATA command and wait for completion.
1098 * Use for implementing commands in kernel
1099 *
1100 * (ide_drive_t *drive, u8 cmd, u8 nsect, u8 feature, u8 sectors, u8 *buf)
1101 */
1102 extern int ide_wait_cmd(ide_drive_t *, u8, u8, u8, u8, u8 *);
1103
1104 typedef struct ide_task_s {
1105 /*
1106 * struct hd_drive_task_hdr tf;
1107 * task_struct_t tf;
1108 * struct hd_drive_hob_hdr hobf;
1109 * hob_struct_t hobf;
1110 */
1111 task_ioreg_t tfRegister[8];
1112 task_ioreg_t hobRegister[8];
1113 ide_reg_valid_t tf_out_flags;
1114 ide_reg_valid_t tf_in_flags;
1115 int data_phase;
1116 int command_type;
1117 ide_pre_handler_t *prehandler;
1118 ide_handler_t *handler;
1119 struct request *rq; /* copy of request */
1120 void *special; /* valid_t generally */
1121 } ide_task_t;
1122
1123 extern u32 ide_read_24(ide_drive_t *);
1124
1125 extern void SELECT_DRIVE(ide_drive_t *);
1126 extern void SELECT_INTERRUPT(ide_drive_t *);
1127 extern void SELECT_MASK(ide_drive_t *, int);
1128 extern void QUIRK_LIST(ide_drive_t *);
1129
1130 extern int drive_is_ready(ide_drive_t *);
1131 extern int wait_for_ready(ide_drive_t *, int /* timeout */);
1132
1133 /*
1134 * taskfile io for disks for now...and builds request from ide_ioctl
1135 */
1136 extern ide_startstop_t do_rw_taskfile(ide_drive_t *, ide_task_t *);
1137
1138 /*
1139 * Special Flagged Register Validation Caller
1140 */
1141 extern ide_startstop_t flagged_taskfile(ide_drive_t *, ide_task_t *);
1142
1143 extern ide_startstop_t set_multmode_intr(ide_drive_t *);
1144 extern ide_startstop_t set_geometry_intr(ide_drive_t *);
1145 extern ide_startstop_t recal_intr(ide_drive_t *);
1146 extern ide_startstop_t task_no_data_intr(ide_drive_t *);
1147 extern ide_startstop_t task_in_intr(ide_drive_t *);
1148 extern ide_startstop_t pre_task_out_intr(ide_drive_t *, struct request *);
1149
1150 extern int ide_raw_taskfile(ide_drive_t *, ide_task_t *, u8 *);
1151
1152 int ide_taskfile_ioctl(ide_drive_t *, unsigned int, unsigned long);
1153 int ide_cmd_ioctl(ide_drive_t *, unsigned int, unsigned long);
1154 int ide_task_ioctl(ide_drive_t *, unsigned int, unsigned long);
1155
1156 extern int system_bus_clock(void);
1157
1158 extern int ide_driveid_update(ide_drive_t *);
1159 extern int ide_ata66_check(ide_drive_t *, ide_task_t *);
1160 extern int ide_config_drive_speed(ide_drive_t *, u8);
1161 extern u8 eighty_ninty_three (ide_drive_t *);
1162 extern int set_transfer(ide_drive_t *, ide_task_t *);
1163 extern int taskfile_lib_get_identify(ide_drive_t *drive, u8 *);
1164
1165 extern int ide_wait_not_busy(ide_hwif_t *hwif, unsigned long timeout);
1166
1167 /*
1168 * ide_stall_queue() can be used by a drive to give excess bandwidth back
1169 * to the hwgroup by sleeping for timeout jiffies.
1170 */
1171 extern void ide_stall_queue(ide_drive_t *drive, unsigned long timeout);
1172
1173 extern int ide_spin_wait_hwgroup(ide_drive_t *);
1174 extern void ide_timer_expiry(unsigned long);
1175 extern irqreturn_t ide_intr(int irq, void *dev_id, struct pt_regs *regs);
1176 extern void do_ide_request(request_queue_t *);
1177
1178 void ide_init_disk(struct gendisk *, ide_drive_t *);
1179
1180 extern int ideprobe_init(void);
1181
1182 extern void ide_scan_pcibus(int scan_direction) __init;
1183 extern int __ide_pci_register_driver(struct pci_driver *driver, struct module *owner);
1184 #define ide_pci_register_driver(d) __ide_pci_register_driver(d, THIS_MODULE)
1185 extern void ide_pci_unregister_driver(struct pci_driver *driver);
1186 void ide_pci_setup_ports(struct pci_dev *, struct ide_pci_device_s *, int, ata_index_t *);
1187 extern void ide_setup_pci_noise (struct pci_dev *dev, struct ide_pci_device_s *d);
1188
1189 extern void default_hwif_iops(ide_hwif_t *);
1190 extern void default_hwif_mmiops(ide_hwif_t *);
1191 extern void default_hwif_transport(ide_hwif_t *);
1192
1193 void ide_register_subdriver(ide_drive_t *, ide_driver_t *);
1194 void ide_unregister_subdriver(ide_drive_t *, ide_driver_t *);
1195
1196 #define ON_BOARD 1
1197 #define NEVER_BOARD 0
1198
1199 #ifdef CONFIG_BLK_DEV_OFFBOARD
1200 # define OFF_BOARD ON_BOARD
1201 #else /* CONFIG_BLK_DEV_OFFBOARD */
1202 # define OFF_BOARD NEVER_BOARD
1203 #endif /* CONFIG_BLK_DEV_OFFBOARD */
1204
1205 #define NODMA 0
1206 #define NOAUTODMA 1
1207 #define AUTODMA 2
1208
1209 typedef struct ide_pci_enablebit_s {
1210 u8 reg; /* byte pci reg holding the enable-bit */
1211 u8 mask; /* mask to isolate the enable-bit */
1212 u8 val; /* value of masked reg when "enabled" */
1213 } ide_pci_enablebit_t;
1214
1215 enum {
1216 /* Uses ISA control ports not PCI ones. */
1217 IDEPCI_FLAG_ISA_PORTS = (1 << 0),
1218 IDEPCI_FLAG_FORCE_PDC = (1 << 1),
1219 };
1220
1221 typedef struct ide_pci_device_s {
1222 char *name;
1223 int (*init_setup)(struct pci_dev *, struct ide_pci_device_s *);
1224 void (*init_setup_dma)(struct pci_dev *, struct ide_pci_device_s *, ide_hwif_t *);
1225 unsigned int (*init_chipset)(struct pci_dev *, const char *);
1226 void (*init_iops)(ide_hwif_t *);
1227 void (*init_hwif)(ide_hwif_t *);
1228 void (*init_dma)(ide_hwif_t *, unsigned long);
1229 void (*fixup)(ide_hwif_t *);
1230 u8 channels;
1231 u8 autodma;
1232 ide_pci_enablebit_t enablebits[2];
1233 u8 bootable;
1234 unsigned int extra;
1235 struct ide_pci_device_s *next;
1236 u8 flags;
1237 } ide_pci_device_t;
1238
1239 extern int ide_setup_pci_device(struct pci_dev *, ide_pci_device_t *);
1240 extern int ide_setup_pci_devices(struct pci_dev *, struct pci_dev *, ide_pci_device_t *);
1241
1242 void ide_map_sg(ide_drive_t *, struct request *);
1243 void ide_init_sg_cmd(ide_drive_t *, struct request *);
1244
1245 #define BAD_DMA_DRIVE 0
1246 #define GOOD_DMA_DRIVE 1
1247
1248 #ifdef CONFIG_BLK_DEV_IDEDMA
1249 struct drive_list_entry {
1250 const char *id_model;
1251 const char *id_firmware;
1252 };
1253
1254 int ide_in_drive_list(struct hd_driveid *, const struct drive_list_entry *);
1255 int __ide_dma_bad_drive(ide_drive_t *);
1256 int __ide_dma_good_drive(ide_drive_t *);
1257 int ide_use_dma(ide_drive_t *);
1258 int __ide_dma_off(ide_drive_t *);
1259 void ide_dma_verbose(ide_drive_t *);
1260 ide_startstop_t ide_dma_intr(ide_drive_t *);
1261
1262 #ifdef CONFIG_BLK_DEV_IDEDMA_PCI
1263 extern int ide_build_sglist(ide_drive_t *, struct request *);
1264 extern int ide_build_dmatable(ide_drive_t *, struct request *);
1265 extern void ide_destroy_dmatable(ide_drive_t *);
1266 extern int ide_release_dma(ide_hwif_t *);
1267 extern void ide_setup_dma(ide_hwif_t *, unsigned long, unsigned int);
1268
1269 extern int __ide_dma_host_off(ide_drive_t *);
1270 extern int __ide_dma_off_quietly(ide_drive_t *);
1271 extern int __ide_dma_host_on(ide_drive_t *);
1272 extern int __ide_dma_on(ide_drive_t *);
1273 extern int __ide_dma_check(ide_drive_t *);
1274 extern int ide_dma_setup(ide_drive_t *);
1275 extern void ide_dma_start(ide_drive_t *);
1276 extern int __ide_dma_end(ide_drive_t *);
1277 extern int __ide_dma_lostirq(ide_drive_t *);
1278 extern int __ide_dma_timeout(ide_drive_t *);
1279 #endif /* CONFIG_BLK_DEV_IDEDMA_PCI */
1280
1281 #else
1282 static inline int ide_use_dma(ide_drive_t *drive) { return 0; }
1283 static inline int __ide_dma_off(ide_drive_t *drive) { return 0; }
1284 static inline void ide_dma_verbose(ide_drive_t *drive) { ; }
1285 #endif /* CONFIG_BLK_DEV_IDEDMA */
1286
1287 #ifndef CONFIG_BLK_DEV_IDEDMA_PCI
1288 static inline void ide_release_dma(ide_hwif_t *drive) {;}
1289 #endif
1290
1291 extern int ide_hwif_request_regions(ide_hwif_t *hwif);
1292 extern void ide_hwif_release_regions(ide_hwif_t* hwif);
1293 extern void ide_unregister (unsigned int index);
1294
1295 void ide_register_region(struct gendisk *);
1296 void ide_unregister_region(struct gendisk *);
1297
1298 void ide_undecoded_slave(ide_hwif_t *);
1299
1300 int probe_hwif_init_with_fixup(ide_hwif_t *, void (*)(ide_hwif_t *));
1301 extern int probe_hwif_init(ide_hwif_t *);
1302
1303 static inline void *ide_get_hwifdata (ide_hwif_t * hwif)
1304 {
1305 return hwif->hwif_data;
1306 }
1307
1308 static inline void ide_set_hwifdata (ide_hwif_t * hwif, void *data)
1309 {
1310 hwif->hwif_data = data;
1311 }
1312
1313 /* ide-lib.c */
1314 extern u8 ide_dma_speed(ide_drive_t *drive, u8 mode);
1315 extern u8 ide_rate_filter(u8 mode, u8 speed);
1316 extern int ide_dma_enable(ide_drive_t *drive);
1317 extern char *ide_xfer_verbose(u8 xfer_rate);
1318 extern void ide_toggle_bounce(ide_drive_t *drive, int on);
1319 extern int ide_set_xfer_rate(ide_drive_t *drive, u8 rate);
1320
1321 u8 ide_dump_status(ide_drive_t *, const char *, u8);
1322
1323 typedef struct ide_pio_timings_s {
1324 int setup_time; /* Address setup (ns) minimum */
1325 int active_time; /* Active pulse (ns) minimum */
1326 int cycle_time; /* Cycle time (ns) minimum = (setup + active + recovery) */
1327 } ide_pio_timings_t;
1328
1329 typedef struct ide_pio_data_s {
1330 u8 pio_mode;
1331 u8 use_iordy;
1332 u8 overridden;
1333 u8 blacklisted;
1334 unsigned int cycle_time;
1335 } ide_pio_data_t;
1336
1337 extern u8 ide_get_best_pio_mode (ide_drive_t *drive, u8 mode_wanted, u8 max_mode, ide_pio_data_t *d);
1338 extern const ide_pio_timings_t ide_pio_timings[6];
1339
1340
1341 extern spinlock_t ide_lock;
1342 extern struct semaphore ide_cfg_sem;
1343 /*
1344 * Structure locking:
1345 *
1346 * ide_cfg_sem and ide_lock together protect changes to
1347 * ide_hwif_t->{next,hwgroup}
1348 * ide_drive_t->next
1349 *
1350 * ide_hwgroup_t->busy: ide_lock
1351 * ide_hwgroup_t->hwif: ide_lock
1352 * ide_hwif_t->mate: constant, no locking
1353 * ide_drive_t->hwif: constant, no locking
1354 */
1355
1356 #define local_irq_set(flags) do { local_save_flags((flags)); local_irq_enable(); } while (0)
1357
1358 extern struct bus_type ide_bus_type;
1359
1360 /* check if CACHE FLUSH (EXT) command is supported (bits defined in ATA-6) */
1361 #define ide_id_has_flush_cache(id) ((id)->cfs_enable_2 & 0x3000)
1362
1363 /* some Maxtor disks have bit 13 defined incorrectly so check bit 10 too */
1364 #define ide_id_has_flush_cache_ext(id) \
1365 (((id)->cfs_enable_2 & 0x2400) == 0x2400)
1366
1367 static inline int hwif_to_node(ide_hwif_t *hwif)
1368 {
1369 struct pci_dev *dev = hwif->pci_dev;
1370 return dev ? pcibus_to_node(dev->bus) : -1;
1371 }
1372
1373 #endif /* _IDE_H */