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Merge master.kernel.org:/home/rmk/linux-2.6-mmc
[deliverable/linux.git] / include / linux / ide.h
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 <linux/completion.h>
22 #include <asm/byteorder.h>
23 #include <asm/system.h>
24 #include <asm/io.h>
25 #include <asm/semaphore.h>
26
27 /******************************************************************************
28 * IDE driver configuration options (play with these as desired):
29 *
30 * REALLY_SLOW_IO can be defined in ide.c and ide-cd.c, if necessary
31 */
32 #define INITIAL_MULT_COUNT 0 /* off=0; on=2,4,8,16,32, etc.. */
33
34 #ifndef SUPPORT_SLOW_DATA_PORTS /* 1 to support slow data ports */
35 #define SUPPORT_SLOW_DATA_PORTS 1 /* 0 to reduce kernel size */
36 #endif
37 #ifndef SUPPORT_VLB_SYNC /* 1 to support weird 32-bit chips */
38 #define SUPPORT_VLB_SYNC 1 /* 0 to reduce kernel size */
39 #endif
40 #ifndef OK_TO_RESET_CONTROLLER /* 1 needed for good error recovery */
41 #define OK_TO_RESET_CONTROLLER 1 /* 0 for use with AH2372A/B interface */
42 #endif
43
44 #ifndef DISABLE_IRQ_NOSYNC
45 #define DISABLE_IRQ_NOSYNC 0
46 #endif
47
48 /*
49 * Used to indicate "no IRQ", should be a value that cannot be an IRQ
50 * number.
51 */
52
53 #define IDE_NO_IRQ (-1)
54
55 /*
56 * "No user-serviceable parts" beyond this point :)
57 *****************************************************************************/
58
59 typedef unsigned char byte; /* used everywhere */
60
61 /*
62 * Probably not wise to fiddle with these
63 */
64 #define ERROR_MAX 8 /* Max read/write errors per sector */
65 #define ERROR_RESET 3 /* Reset controller every 4th retry */
66 #define ERROR_RECAL 1 /* Recalibrate every 2nd retry */
67
68 /*
69 * Tune flags
70 */
71 #define IDE_TUNE_NOAUTO 2
72 #define IDE_TUNE_AUTO 1
73 #define IDE_TUNE_DEFAULT 0
74
75 /*
76 * state flags
77 */
78
79 #define DMA_PIO_RETRY 1 /* retrying in PIO */
80
81 #define HWIF(drive) ((ide_hwif_t *)((drive)->hwif))
82 #define HWGROUP(drive) ((ide_hwgroup_t *)(HWIF(drive)->hwgroup))
83
84 /*
85 * Definitions for accessing IDE controller registers
86 */
87 #define IDE_NR_PORTS (10)
88
89 #define IDE_DATA_OFFSET (0)
90 #define IDE_ERROR_OFFSET (1)
91 #define IDE_NSECTOR_OFFSET (2)
92 #define IDE_SECTOR_OFFSET (3)
93 #define IDE_LCYL_OFFSET (4)
94 #define IDE_HCYL_OFFSET (5)
95 #define IDE_SELECT_OFFSET (6)
96 #define IDE_STATUS_OFFSET (7)
97 #define IDE_CONTROL_OFFSET (8)
98 #define IDE_IRQ_OFFSET (9)
99
100 #define IDE_FEATURE_OFFSET IDE_ERROR_OFFSET
101 #define IDE_COMMAND_OFFSET IDE_STATUS_OFFSET
102
103 #define IDE_CONTROL_OFFSET_HOB (7)
104
105 #define IDE_DATA_REG (HWIF(drive)->io_ports[IDE_DATA_OFFSET])
106 #define IDE_ERROR_REG (HWIF(drive)->io_ports[IDE_ERROR_OFFSET])
107 #define IDE_NSECTOR_REG (HWIF(drive)->io_ports[IDE_NSECTOR_OFFSET])
108 #define IDE_SECTOR_REG (HWIF(drive)->io_ports[IDE_SECTOR_OFFSET])
109 #define IDE_LCYL_REG (HWIF(drive)->io_ports[IDE_LCYL_OFFSET])
110 #define IDE_HCYL_REG (HWIF(drive)->io_ports[IDE_HCYL_OFFSET])
111 #define IDE_SELECT_REG (HWIF(drive)->io_ports[IDE_SELECT_OFFSET])
112 #define IDE_STATUS_REG (HWIF(drive)->io_ports[IDE_STATUS_OFFSET])
113 #define IDE_CONTROL_REG (HWIF(drive)->io_ports[IDE_CONTROL_OFFSET])
114 #define IDE_IRQ_REG (HWIF(drive)->io_ports[IDE_IRQ_OFFSET])
115
116 #define IDE_FEATURE_REG IDE_ERROR_REG
117 #define IDE_COMMAND_REG IDE_STATUS_REG
118 #define IDE_ALTSTATUS_REG IDE_CONTROL_REG
119 #define IDE_IREASON_REG IDE_NSECTOR_REG
120 #define IDE_BCOUNTL_REG IDE_LCYL_REG
121 #define IDE_BCOUNTH_REG IDE_HCYL_REG
122
123 #define OK_STAT(stat,good,bad) (((stat)&((good)|(bad)))==(good))
124 #define BAD_R_STAT (BUSY_STAT | ERR_STAT)
125 #define BAD_W_STAT (BAD_R_STAT | WRERR_STAT)
126 #define BAD_STAT (BAD_R_STAT | DRQ_STAT)
127 #define DRIVE_READY (READY_STAT | SEEK_STAT)
128 #define DATA_READY (DRQ_STAT)
129
130 #define BAD_CRC (ABRT_ERR | ICRC_ERR)
131
132 #define SATA_NR_PORTS (3) /* 16 possible ?? */
133
134 #define SATA_STATUS_OFFSET (0)
135 #define SATA_STATUS_REG (HWIF(drive)->sata_scr[SATA_STATUS_OFFSET])
136 #define SATA_ERROR_OFFSET (1)
137 #define SATA_ERROR_REG (HWIF(drive)->sata_scr[SATA_ERROR_OFFSET])
138 #define SATA_CONTROL_OFFSET (2)
139 #define SATA_CONTROL_REG (HWIF(drive)->sata_scr[SATA_CONTROL_OFFSET])
140
141 #define SATA_MISC_OFFSET (0)
142 #define SATA_MISC_REG (HWIF(drive)->sata_misc[SATA_MISC_OFFSET])
143 #define SATA_PHY_OFFSET (1)
144 #define SATA_PHY_REG (HWIF(drive)->sata_misc[SATA_PHY_OFFSET])
145 #define SATA_IEN_OFFSET (2)
146 #define SATA_IEN_REG (HWIF(drive)->sata_misc[SATA_IEN_OFFSET])
147
148 /*
149 * Our Physical Region Descriptor (PRD) table should be large enough
150 * to handle the biggest I/O request we are likely to see. Since requests
151 * can have no more than 256 sectors, and since the typical blocksize is
152 * two or more sectors, we could get by with a limit of 128 entries here for
153 * the usual worst case. Most requests seem to include some contiguous blocks,
154 * further reducing the number of table entries required.
155 *
156 * The driver reverts to PIO mode for individual requests that exceed
157 * this limit (possible with 512 byte blocksizes, eg. MSDOS f/s), so handling
158 * 100% of all crazy scenarios here is not necessary.
159 *
160 * As it turns out though, we must allocate a full 4KB page for this,
161 * so the two PRD tables (ide0 & ide1) will each get half of that,
162 * allowing each to have about 256 entries (8 bytes each) from this.
163 */
164 #define PRD_BYTES 8
165 #define PRD_ENTRIES 256
166
167 /*
168 * Some more useful definitions
169 */
170 #define PARTN_BITS 6 /* number of minor dev bits for partitions */
171 #define MAX_DRIVES 2 /* per interface; 2 assumed by lots of code */
172 #define SECTOR_SIZE 512
173 #define SECTOR_WORDS (SECTOR_SIZE / 4) /* number of 32bit words per sector */
174 #define IDE_LARGE_SEEK(b1,b2,t) (((b1) > (b2) + (t)) || ((b2) > (b1) + (t)))
175
176 /*
177 * Timeouts for various operations:
178 */
179 #define WAIT_DRQ (HZ/10) /* 100msec - spec allows up to 20ms */
180 #define WAIT_READY (5*HZ) /* 5sec - some laptops are very slow */
181 #define WAIT_PIDENTIFY (10*HZ) /* 10sec - should be less than 3ms (?), if all ATAPI CD is closed at boot */
182 #define WAIT_WORSTCASE (30*HZ) /* 30sec - worst case when spinning up */
183 #define WAIT_CMD (10*HZ) /* 10sec - maximum wait for an IRQ to happen */
184 #define WAIT_MIN_SLEEP (2*HZ/100) /* 20msec - minimum sleep time */
185
186 /*
187 * Check for an interrupt and acknowledge the interrupt status
188 */
189 struct hwif_s;
190 typedef int (ide_ack_intr_t)(struct hwif_s *);
191
192 #ifndef NO_DMA
193 #define NO_DMA 255
194 #endif
195
196 /*
197 * hwif_chipset_t is used to keep track of the specific hardware
198 * chipset used by each IDE interface, if known.
199 */
200 typedef enum { ide_unknown, ide_generic, ide_pci,
201 ide_cmd640, ide_dtc2278, ide_ali14xx,
202 ide_qd65xx, ide_umc8672, ide_ht6560b,
203 ide_rz1000, ide_trm290,
204 ide_cmd646, ide_cy82c693, ide_4drives,
205 ide_pmac, ide_etrax100, ide_acorn,
206 ide_au1xxx, ide_forced
207 } hwif_chipset_t;
208
209 /*
210 * Structure to hold all information about the location of this port
211 */
212 typedef struct hw_regs_s {
213 unsigned long io_ports[IDE_NR_PORTS]; /* task file registers */
214 int irq; /* our irq number */
215 int dma; /* our dma entry */
216 ide_ack_intr_t *ack_intr; /* acknowledge interrupt */
217 hwif_chipset_t chipset;
218 struct device *dev;
219 } hw_regs_t;
220
221 /*
222 * Register new hardware with ide
223 */
224 int ide_register_hw(hw_regs_t *hw, struct hwif_s **hwifp);
225 int ide_register_hw_with_fixup(hw_regs_t *, struct hwif_s **, void (*)(struct hwif_s *));
226
227 /*
228 * Set up hw_regs_t structure before calling ide_register_hw (optional)
229 */
230 void ide_setup_ports( hw_regs_t *hw,
231 unsigned long base,
232 int *offsets,
233 unsigned long ctrl,
234 unsigned long intr,
235 ide_ack_intr_t *ack_intr,
236 #if 0
237 ide_io_ops_t *iops,
238 #endif
239 int irq);
240
241 static inline void ide_std_init_ports(hw_regs_t *hw,
242 unsigned long io_addr,
243 unsigned long ctl_addr)
244 {
245 unsigned int i;
246
247 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
248 hw->io_ports[i] = io_addr++;
249
250 hw->io_ports[IDE_CONTROL_OFFSET] = ctl_addr;
251 }
252
253 #include <asm/ide.h>
254
255 #ifndef MAX_HWIFS
256 #define MAX_HWIFS CONFIG_IDE_MAX_HWIFS
257 #endif
258
259 /* needed on alpha, x86/x86_64, ia64, mips, ppc32 and sh */
260 #ifndef IDE_ARCH_OBSOLETE_DEFAULTS
261 # define ide_default_io_base(index) (0)
262 # define ide_default_irq(base) (0)
263 # define ide_init_default_irq(base) (0)
264 #endif
265
266 /*
267 * ide_init_hwif_ports() is OBSOLETE and will be removed in 2.7 series.
268 * New ports shouldn't define IDE_ARCH_OBSOLETE_INIT in <asm/ide.h>.
269 */
270 #ifdef IDE_ARCH_OBSOLETE_INIT
271 static inline void ide_init_hwif_ports(hw_regs_t *hw,
272 unsigned long io_addr,
273 unsigned long ctl_addr,
274 int *irq)
275 {
276 if (!ctl_addr)
277 ide_std_init_ports(hw, io_addr, ide_default_io_ctl(io_addr));
278 else
279 ide_std_init_ports(hw, io_addr, ctl_addr);
280
281 if (irq)
282 *irq = 0;
283
284 hw->io_ports[IDE_IRQ_OFFSET] = 0;
285
286 #ifdef CONFIG_PPC32
287 if (ppc_ide_md.ide_init_hwif)
288 ppc_ide_md.ide_init_hwif(hw, io_addr, ctl_addr, irq);
289 #endif
290 }
291 #else
292 static inline void ide_init_hwif_ports(hw_regs_t *hw,
293 unsigned long io_addr,
294 unsigned long ctl_addr,
295 int *irq)
296 {
297 if (io_addr || ctl_addr)
298 printk(KERN_WARNING "%s: must not be called\n", __FUNCTION__);
299 }
300 #endif /* IDE_ARCH_OBSOLETE_INIT */
301
302 /* Currently only m68k, apus and m8xx need it */
303 #ifndef IDE_ARCH_ACK_INTR
304 # define ide_ack_intr(hwif) (1)
305 #endif
306
307 /* Currently only Atari needs it */
308 #ifndef IDE_ARCH_LOCK
309 # define ide_release_lock() do {} while (0)
310 # define ide_get_lock(hdlr, data) do {} while (0)
311 #endif /* IDE_ARCH_LOCK */
312
313 /*
314 * Now for the data we need to maintain per-drive: ide_drive_t
315 */
316
317 #define ide_scsi 0x21
318 #define ide_disk 0x20
319 #define ide_optical 0x7
320 #define ide_cdrom 0x5
321 #define ide_tape 0x1
322 #define ide_floppy 0x0
323
324 /*
325 * Special Driver Flags
326 *
327 * set_geometry : respecify drive geometry
328 * recalibrate : seek to cyl 0
329 * set_multmode : set multmode count
330 * set_tune : tune interface for drive
331 * serviced : service command
332 * reserved : unused
333 */
334 typedef union {
335 unsigned all : 8;
336 struct {
337 #if defined(__LITTLE_ENDIAN_BITFIELD)
338 unsigned set_geometry : 1;
339 unsigned recalibrate : 1;
340 unsigned set_multmode : 1;
341 unsigned set_tune : 1;
342 unsigned serviced : 1;
343 unsigned reserved : 3;
344 #elif defined(__BIG_ENDIAN_BITFIELD)
345 unsigned reserved : 3;
346 unsigned serviced : 1;
347 unsigned set_tune : 1;
348 unsigned set_multmode : 1;
349 unsigned recalibrate : 1;
350 unsigned set_geometry : 1;
351 #else
352 #error "Please fix <asm/byteorder.h>"
353 #endif
354 } b;
355 } special_t;
356
357 /*
358 * ATA DATA Register Special.
359 * ATA NSECTOR Count Register().
360 * ATAPI Byte Count Register.
361 * Channel index ordering pairs.
362 */
363 typedef union {
364 unsigned all :16;
365 struct {
366 #if defined(__LITTLE_ENDIAN_BITFIELD)
367 unsigned low :8; /* LSB */
368 unsigned high :8; /* MSB */
369 #elif defined(__BIG_ENDIAN_BITFIELD)
370 unsigned high :8; /* MSB */
371 unsigned low :8; /* LSB */
372 #else
373 #error "Please fix <asm/byteorder.h>"
374 #endif
375 } b;
376 } ata_nsector_t, ata_data_t, atapi_bcount_t, ata_index_t;
377
378 /*
379 * ATA-IDE Select Register, aka Device-Head
380 *
381 * head : always zeros here
382 * unit : drive select number: 0/1
383 * bit5 : always 1
384 * lba : using LBA instead of CHS
385 * bit7 : always 1
386 */
387 typedef union {
388 unsigned all : 8;
389 struct {
390 #if defined(__LITTLE_ENDIAN_BITFIELD)
391 unsigned head : 4;
392 unsigned unit : 1;
393 unsigned bit5 : 1;
394 unsigned lba : 1;
395 unsigned bit7 : 1;
396 #elif defined(__BIG_ENDIAN_BITFIELD)
397 unsigned bit7 : 1;
398 unsigned lba : 1;
399 unsigned bit5 : 1;
400 unsigned unit : 1;
401 unsigned head : 4;
402 #else
403 #error "Please fix <asm/byteorder.h>"
404 #endif
405 } b;
406 } select_t, ata_select_t;
407
408 /*
409 * The ATA-IDE Status Register.
410 * The ATAPI Status Register.
411 *
412 * check : Error occurred
413 * idx : Index Error
414 * corr : Correctable error occurred
415 * drq : Data is request by the device
416 * dsc : Disk Seek Complete : ata
417 * : Media access command finished : atapi
418 * df : Device Fault : ata
419 * : Reserved : atapi
420 * drdy : Ready, Command Mode Capable : ata
421 * : Ignored for ATAPI commands : atapi
422 * bsy : Disk is Busy
423 * : The device has access to the command block
424 */
425 typedef union {
426 unsigned all :8;
427 struct {
428 #if defined(__LITTLE_ENDIAN_BITFIELD)
429 unsigned check :1;
430 unsigned idx :1;
431 unsigned corr :1;
432 unsigned drq :1;
433 unsigned dsc :1;
434 unsigned df :1;
435 unsigned drdy :1;
436 unsigned bsy :1;
437 #elif defined(__BIG_ENDIAN_BITFIELD)
438 unsigned bsy :1;
439 unsigned drdy :1;
440 unsigned df :1;
441 unsigned dsc :1;
442 unsigned drq :1;
443 unsigned corr :1;
444 unsigned idx :1;
445 unsigned check :1;
446 #else
447 #error "Please fix <asm/byteorder.h>"
448 #endif
449 } b;
450 } ata_status_t, atapi_status_t;
451
452 /*
453 * ATAPI Feature Register
454 *
455 * dma : Using DMA or PIO
456 * reserved321 : Reserved
457 * reserved654 : Reserved (Tag Type)
458 * reserved7 : Reserved
459 */
460 typedef union {
461 unsigned all :8;
462 struct {
463 #if defined(__LITTLE_ENDIAN_BITFIELD)
464 unsigned dma :1;
465 unsigned reserved321 :3;
466 unsigned reserved654 :3;
467 unsigned reserved7 :1;
468 #elif defined(__BIG_ENDIAN_BITFIELD)
469 unsigned reserved7 :1;
470 unsigned reserved654 :3;
471 unsigned reserved321 :3;
472 unsigned dma :1;
473 #else
474 #error "Please fix <asm/byteorder.h>"
475 #endif
476 } b;
477 } atapi_feature_t;
478
479 /*
480 * ATAPI Interrupt Reason Register.
481 *
482 * cod : Information transferred is command (1) or data (0)
483 * io : The device requests us to read (1) or write (0)
484 * reserved : Reserved
485 */
486 typedef union {
487 unsigned all :8;
488 struct {
489 #if defined(__LITTLE_ENDIAN_BITFIELD)
490 unsigned cod :1;
491 unsigned io :1;
492 unsigned reserved :6;
493 #elif defined(__BIG_ENDIAN_BITFIELD)
494 unsigned reserved :6;
495 unsigned io :1;
496 unsigned cod :1;
497 #else
498 #error "Please fix <asm/byteorder.h>"
499 #endif
500 } b;
501 } atapi_ireason_t;
502
503 /*
504 * The ATAPI error register.
505 *
506 * ili : Illegal Length Indication
507 * eom : End Of Media Detected
508 * abrt : Aborted command - As defined by ATA
509 * mcr : Media Change Requested - As defined by ATA
510 * sense_key : Sense key of the last failed packet command
511 */
512 typedef union {
513 unsigned all :8;
514 struct {
515 #if defined(__LITTLE_ENDIAN_BITFIELD)
516 unsigned ili :1;
517 unsigned eom :1;
518 unsigned abrt :1;
519 unsigned mcr :1;
520 unsigned sense_key :4;
521 #elif defined(__BIG_ENDIAN_BITFIELD)
522 unsigned sense_key :4;
523 unsigned mcr :1;
524 unsigned abrt :1;
525 unsigned eom :1;
526 unsigned ili :1;
527 #else
528 #error "Please fix <asm/byteorder.h>"
529 #endif
530 } b;
531 } atapi_error_t;
532
533 /*
534 * Status returned from various ide_ functions
535 */
536 typedef enum {
537 ide_stopped, /* no drive operation was started */
538 ide_started, /* a drive operation was started, handler was set */
539 } ide_startstop_t;
540
541 struct ide_driver_s;
542 struct ide_settings_s;
543
544 typedef struct ide_drive_s {
545 char name[4]; /* drive name, such as "hda" */
546 char driver_req[10]; /* requests specific driver */
547
548 request_queue_t *queue; /* request queue */
549
550 struct request *rq; /* current request */
551 struct ide_drive_s *next; /* circular list of hwgroup drives */
552 void *driver_data; /* extra driver data */
553 struct hd_driveid *id; /* drive model identification info */
554 struct proc_dir_entry *proc; /* /proc/ide/ directory entry */
555 struct ide_settings_s *settings;/* /proc/ide/ drive settings */
556 char devfs_name[64]; /* devfs crap */
557
558 struct hwif_s *hwif; /* actually (ide_hwif_t *) */
559
560 unsigned long sleep; /* sleep until this time */
561 unsigned long service_start; /* time we started last request */
562 unsigned long service_time; /* service time of last request */
563 unsigned long timeout; /* max time to wait for irq */
564
565 special_t special; /* special action flags */
566 select_t select; /* basic drive/head select reg value */
567
568 u8 keep_settings; /* restore settings after drive reset */
569 u8 autodma; /* device can safely use dma on host */
570 u8 using_dma; /* disk is using dma for read/write */
571 u8 retry_pio; /* retrying dma capable host in pio */
572 u8 state; /* retry state */
573 u8 waiting_for_dma; /* dma currently in progress */
574 u8 unmask; /* okay to unmask other irqs */
575 u8 bswap; /* byte swap data */
576 u8 dsc_overlap; /* DSC overlap */
577 u8 nice1; /* give potential excess bandwidth */
578
579 unsigned present : 1; /* drive is physically present */
580 unsigned dead : 1; /* device ejected hint */
581 unsigned id_read : 1; /* 1=id read from disk 0 = synthetic */
582 unsigned noprobe : 1; /* from: hdx=noprobe */
583 unsigned removable : 1; /* 1 if need to do check_media_change */
584 unsigned attach : 1; /* needed for removable devices */
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 completion gendev_rel_comp; /* 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 completion gendev_rel_comp; /* 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_internodealigned_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 int (*probe)(ide_drive_t *);
986 void (*remove)(ide_drive_t *);
987 void (*shutdown)(ide_drive_t *);
988 } ide_driver_t;
989
990 #define to_ide_driver(drv) container_of(drv, ide_driver_t, gen_driver)
991
992 int generic_ide_ioctl(ide_drive_t *, struct file *, struct block_device *, unsigned, unsigned long);
993
994 /*
995 * ide_hwifs[] is the master data structure used to keep track
996 * of just about everything in ide.c. Whenever possible, routines
997 * should be using pointers to a drive (ide_drive_t *) or
998 * pointers to a hwif (ide_hwif_t *), rather than indexing this
999 * structure directly (the allocation/layout may change!).
1000 *
1001 */
1002 #ifndef _IDE_C
1003 extern ide_hwif_t ide_hwifs[]; /* master data repository */
1004 #endif
1005 extern int noautodma;
1006
1007 extern int ide_end_request (ide_drive_t *drive, int uptodate, int nrsecs);
1008
1009 /*
1010 * This is used on exit from the driver to designate the next irq handler
1011 * and also to start the safety timer.
1012 */
1013 extern void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler, unsigned int timeout, ide_expiry_t *expiry);
1014
1015 /*
1016 * This is used on exit from the driver to designate the next irq handler
1017 * and start the safety time safely and atomically from the IRQ handler
1018 * with respect to the command issue (which it also does)
1019 */
1020 extern void ide_execute_command(ide_drive_t *, task_ioreg_t cmd, ide_handler_t *, unsigned int, ide_expiry_t *);
1021
1022 ide_startstop_t __ide_error(ide_drive_t *, struct request *, u8, u8);
1023
1024 /*
1025 * ide_error() takes action based on the error returned by the controller.
1026 * The caller should return immediately after invoking this.
1027 *
1028 * (drive, msg, status)
1029 */
1030 ide_startstop_t ide_error (ide_drive_t *drive, const char *msg, byte stat);
1031
1032 ide_startstop_t __ide_abort(ide_drive_t *, struct request *);
1033
1034 /*
1035 * Abort a running command on the controller triggering the abort
1036 * from a host side, non error situation
1037 * (drive, msg)
1038 */
1039 extern ide_startstop_t ide_abort(ide_drive_t *, const char *);
1040
1041 extern void ide_fix_driveid(struct hd_driveid *);
1042 /*
1043 * ide_fixstring() cleans up and (optionally) byte-swaps a text string,
1044 * removing leading/trailing blanks and compressing internal blanks.
1045 * It is primarily used to tidy up the model name/number fields as
1046 * returned by the WIN_[P]IDENTIFY commands.
1047 *
1048 * (s, bytecount, byteswap)
1049 */
1050 extern void ide_fixstring(u8 *, const int, const int);
1051
1052 /*
1053 * This routine busy-waits for the drive status to be not "busy".
1054 * It then checks the status for all of the "good" bits and none
1055 * of the "bad" bits, and if all is okay it returns 0. All other
1056 * cases return 1 after doing "*startstop = ide_error()", and the
1057 * caller should return the updated value of "startstop" in this case.
1058 * "startstop" is unchanged when the function returns 0;
1059 * (startstop, drive, good, bad, timeout)
1060 */
1061 extern int ide_wait_stat(ide_startstop_t *, ide_drive_t *, u8, u8, unsigned long);
1062
1063 /*
1064 * Start a reset operation for an IDE interface.
1065 * The caller should return immediately after invoking this.
1066 */
1067 extern ide_startstop_t ide_do_reset (ide_drive_t *);
1068
1069 /*
1070 * This function is intended to be used prior to invoking ide_do_drive_cmd().
1071 */
1072 extern void ide_init_drive_cmd (struct request *rq);
1073
1074 /*
1075 * this function returns error location sector offset in case of a write error
1076 */
1077 extern u64 ide_get_error_location(ide_drive_t *, char *);
1078
1079 /*
1080 * "action" parameter type for ide_do_drive_cmd() below.
1081 */
1082 typedef enum {
1083 ide_wait, /* insert rq at end of list, and wait for it */
1084 ide_preempt, /* insert rq in front of current request */
1085 ide_head_wait, /* insert rq in front of current request and wait for it */
1086 ide_end /* insert rq at end of list, but don't wait for it */
1087 } ide_action_t;
1088
1089 extern int ide_do_drive_cmd(ide_drive_t *, struct request *, ide_action_t);
1090
1091 /*
1092 * Clean up after success/failure of an explicit drive cmd.
1093 * stat/err are used only when (HWGROUP(drive)->rq->cmd == IDE_DRIVE_CMD).
1094 * stat/err are used only when (HWGROUP(drive)->rq->cmd == IDE_DRIVE_TASK_MASK).
1095 *
1096 * (ide_drive_t *drive, u8 stat, u8 err)
1097 */
1098 extern void ide_end_drive_cmd(ide_drive_t *, u8, u8);
1099
1100 /*
1101 * Issue ATA command and wait for completion.
1102 * Use for implementing commands in kernel
1103 *
1104 * (ide_drive_t *drive, u8 cmd, u8 nsect, u8 feature, u8 sectors, u8 *buf)
1105 */
1106 extern int ide_wait_cmd(ide_drive_t *, u8, u8, u8, u8, u8 *);
1107
1108 typedef struct ide_task_s {
1109 /*
1110 * struct hd_drive_task_hdr tf;
1111 * task_struct_t tf;
1112 * struct hd_drive_hob_hdr hobf;
1113 * hob_struct_t hobf;
1114 */
1115 task_ioreg_t tfRegister[8];
1116 task_ioreg_t hobRegister[8];
1117 ide_reg_valid_t tf_out_flags;
1118 ide_reg_valid_t tf_in_flags;
1119 int data_phase;
1120 int command_type;
1121 ide_pre_handler_t *prehandler;
1122 ide_handler_t *handler;
1123 struct request *rq; /* copy of request */
1124 void *special; /* valid_t generally */
1125 } ide_task_t;
1126
1127 extern u32 ide_read_24(ide_drive_t *);
1128
1129 extern void SELECT_DRIVE(ide_drive_t *);
1130 extern void SELECT_INTERRUPT(ide_drive_t *);
1131 extern void SELECT_MASK(ide_drive_t *, int);
1132 extern void QUIRK_LIST(ide_drive_t *);
1133
1134 extern int drive_is_ready(ide_drive_t *);
1135 extern int wait_for_ready(ide_drive_t *, int /* timeout */);
1136
1137 /*
1138 * taskfile io for disks for now...and builds request from ide_ioctl
1139 */
1140 extern ide_startstop_t do_rw_taskfile(ide_drive_t *, ide_task_t *);
1141
1142 /*
1143 * Special Flagged Register Validation Caller
1144 */
1145 extern ide_startstop_t flagged_taskfile(ide_drive_t *, ide_task_t *);
1146
1147 extern ide_startstop_t set_multmode_intr(ide_drive_t *);
1148 extern ide_startstop_t set_geometry_intr(ide_drive_t *);
1149 extern ide_startstop_t recal_intr(ide_drive_t *);
1150 extern ide_startstop_t task_no_data_intr(ide_drive_t *);
1151 extern ide_startstop_t task_in_intr(ide_drive_t *);
1152 extern ide_startstop_t pre_task_out_intr(ide_drive_t *, struct request *);
1153
1154 extern int ide_raw_taskfile(ide_drive_t *, ide_task_t *, u8 *);
1155
1156 int ide_taskfile_ioctl(ide_drive_t *, unsigned int, unsigned long);
1157 int ide_cmd_ioctl(ide_drive_t *, unsigned int, unsigned long);
1158 int ide_task_ioctl(ide_drive_t *, unsigned int, unsigned long);
1159
1160 extern int system_bus_clock(void);
1161
1162 extern int ide_driveid_update(ide_drive_t *);
1163 extern int ide_ata66_check(ide_drive_t *, ide_task_t *);
1164 extern int ide_config_drive_speed(ide_drive_t *, u8);
1165 extern u8 eighty_ninty_three (ide_drive_t *);
1166 extern int set_transfer(ide_drive_t *, ide_task_t *);
1167 extern int taskfile_lib_get_identify(ide_drive_t *drive, u8 *);
1168
1169 extern int ide_wait_not_busy(ide_hwif_t *hwif, unsigned long timeout);
1170
1171 /*
1172 * ide_stall_queue() can be used by a drive to give excess bandwidth back
1173 * to the hwgroup by sleeping for timeout jiffies.
1174 */
1175 extern void ide_stall_queue(ide_drive_t *drive, unsigned long timeout);
1176
1177 extern int ide_spin_wait_hwgroup(ide_drive_t *);
1178 extern void ide_timer_expiry(unsigned long);
1179 extern irqreturn_t ide_intr(int irq, void *dev_id, struct pt_regs *regs);
1180 extern void do_ide_request(request_queue_t *);
1181
1182 void ide_init_disk(struct gendisk *, ide_drive_t *);
1183
1184 extern int ideprobe_init(void);
1185
1186 extern void ide_scan_pcibus(int scan_direction) __init;
1187 extern int __ide_pci_register_driver(struct pci_driver *driver, struct module *owner);
1188 #define ide_pci_register_driver(d) __ide_pci_register_driver(d, THIS_MODULE)
1189 extern void ide_pci_unregister_driver(struct pci_driver *driver);
1190 void ide_pci_setup_ports(struct pci_dev *, struct ide_pci_device_s *, int, ata_index_t *);
1191 extern void ide_setup_pci_noise (struct pci_dev *dev, struct ide_pci_device_s *d);
1192
1193 extern void default_hwif_iops(ide_hwif_t *);
1194 extern void default_hwif_mmiops(ide_hwif_t *);
1195 extern void default_hwif_transport(ide_hwif_t *);
1196
1197 void ide_register_subdriver(ide_drive_t *, ide_driver_t *);
1198 void ide_unregister_subdriver(ide_drive_t *, ide_driver_t *);
1199
1200 #define ON_BOARD 1
1201 #define NEVER_BOARD 0
1202
1203 #ifdef CONFIG_BLK_DEV_OFFBOARD
1204 # define OFF_BOARD ON_BOARD
1205 #else /* CONFIG_BLK_DEV_OFFBOARD */
1206 # define OFF_BOARD NEVER_BOARD
1207 #endif /* CONFIG_BLK_DEV_OFFBOARD */
1208
1209 #define NODMA 0
1210 #define NOAUTODMA 1
1211 #define AUTODMA 2
1212
1213 typedef struct ide_pci_enablebit_s {
1214 u8 reg; /* byte pci reg holding the enable-bit */
1215 u8 mask; /* mask to isolate the enable-bit */
1216 u8 val; /* value of masked reg when "enabled" */
1217 } ide_pci_enablebit_t;
1218
1219 enum {
1220 /* Uses ISA control ports not PCI ones. */
1221 IDEPCI_FLAG_ISA_PORTS = (1 << 0),
1222 IDEPCI_FLAG_FORCE_PDC = (1 << 1),
1223 };
1224
1225 typedef struct ide_pci_device_s {
1226 char *name;
1227 int (*init_setup)(struct pci_dev *, struct ide_pci_device_s *);
1228 void (*init_setup_dma)(struct pci_dev *, struct ide_pci_device_s *, ide_hwif_t *);
1229 unsigned int (*init_chipset)(struct pci_dev *, const char *);
1230 void (*init_iops)(ide_hwif_t *);
1231 void (*init_hwif)(ide_hwif_t *);
1232 void (*init_dma)(ide_hwif_t *, unsigned long);
1233 void (*fixup)(ide_hwif_t *);
1234 u8 channels;
1235 u8 autodma;
1236 ide_pci_enablebit_t enablebits[2];
1237 u8 bootable;
1238 unsigned int extra;
1239 struct ide_pci_device_s *next;
1240 u8 flags;
1241 } ide_pci_device_t;
1242
1243 extern int ide_setup_pci_device(struct pci_dev *, ide_pci_device_t *);
1244 extern int ide_setup_pci_devices(struct pci_dev *, struct pci_dev *, ide_pci_device_t *);
1245
1246 void ide_map_sg(ide_drive_t *, struct request *);
1247 void ide_init_sg_cmd(ide_drive_t *, struct request *);
1248
1249 #define BAD_DMA_DRIVE 0
1250 #define GOOD_DMA_DRIVE 1
1251
1252 #ifdef CONFIG_BLK_DEV_IDEDMA
1253 struct drive_list_entry {
1254 const char *id_model;
1255 const char *id_firmware;
1256 };
1257
1258 int ide_in_drive_list(struct hd_driveid *, const struct drive_list_entry *);
1259 int __ide_dma_bad_drive(ide_drive_t *);
1260 int __ide_dma_good_drive(ide_drive_t *);
1261 int ide_use_dma(ide_drive_t *);
1262 int __ide_dma_off(ide_drive_t *);
1263 void ide_dma_verbose(ide_drive_t *);
1264 ide_startstop_t ide_dma_intr(ide_drive_t *);
1265
1266 #ifdef CONFIG_BLK_DEV_IDEDMA_PCI
1267 extern int ide_build_sglist(ide_drive_t *, struct request *);
1268 extern int ide_build_dmatable(ide_drive_t *, struct request *);
1269 extern void ide_destroy_dmatable(ide_drive_t *);
1270 extern int ide_release_dma(ide_hwif_t *);
1271 extern void ide_setup_dma(ide_hwif_t *, unsigned long, unsigned int);
1272
1273 extern int __ide_dma_host_off(ide_drive_t *);
1274 extern int __ide_dma_off_quietly(ide_drive_t *);
1275 extern int __ide_dma_host_on(ide_drive_t *);
1276 extern int __ide_dma_on(ide_drive_t *);
1277 extern int __ide_dma_check(ide_drive_t *);
1278 extern int ide_dma_setup(ide_drive_t *);
1279 extern void ide_dma_start(ide_drive_t *);
1280 extern int __ide_dma_end(ide_drive_t *);
1281 extern int __ide_dma_lostirq(ide_drive_t *);
1282 extern int __ide_dma_timeout(ide_drive_t *);
1283 #endif /* CONFIG_BLK_DEV_IDEDMA_PCI */
1284
1285 #else
1286 static inline int ide_use_dma(ide_drive_t *drive) { return 0; }
1287 static inline int __ide_dma_off(ide_drive_t *drive) { return 0; }
1288 static inline void ide_dma_verbose(ide_drive_t *drive) { ; }
1289 #endif /* CONFIG_BLK_DEV_IDEDMA */
1290
1291 #ifndef CONFIG_BLK_DEV_IDEDMA_PCI
1292 static inline void ide_release_dma(ide_hwif_t *drive) {;}
1293 #endif
1294
1295 extern int ide_hwif_request_regions(ide_hwif_t *hwif);
1296 extern void ide_hwif_release_regions(ide_hwif_t* hwif);
1297 extern void ide_unregister (unsigned int index);
1298
1299 void ide_register_region(struct gendisk *);
1300 void ide_unregister_region(struct gendisk *);
1301
1302 void ide_undecoded_slave(ide_hwif_t *);
1303
1304 int probe_hwif_init_with_fixup(ide_hwif_t *, void (*)(ide_hwif_t *));
1305 extern int probe_hwif_init(ide_hwif_t *);
1306
1307 static inline void *ide_get_hwifdata (ide_hwif_t * hwif)
1308 {
1309 return hwif->hwif_data;
1310 }
1311
1312 static inline void ide_set_hwifdata (ide_hwif_t * hwif, void *data)
1313 {
1314 hwif->hwif_data = data;
1315 }
1316
1317 /* ide-lib.c */
1318 extern u8 ide_dma_speed(ide_drive_t *drive, u8 mode);
1319 extern u8 ide_rate_filter(u8 mode, u8 speed);
1320 extern int ide_dma_enable(ide_drive_t *drive);
1321 extern char *ide_xfer_verbose(u8 xfer_rate);
1322 extern void ide_toggle_bounce(ide_drive_t *drive, int on);
1323 extern int ide_set_xfer_rate(ide_drive_t *drive, u8 rate);
1324
1325 u8 ide_dump_status(ide_drive_t *, const char *, u8);
1326
1327 typedef struct ide_pio_timings_s {
1328 int setup_time; /* Address setup (ns) minimum */
1329 int active_time; /* Active pulse (ns) minimum */
1330 int cycle_time; /* Cycle time (ns) minimum = (setup + active + recovery) */
1331 } ide_pio_timings_t;
1332
1333 typedef struct ide_pio_data_s {
1334 u8 pio_mode;
1335 u8 use_iordy;
1336 u8 overridden;
1337 u8 blacklisted;
1338 unsigned int cycle_time;
1339 } ide_pio_data_t;
1340
1341 extern u8 ide_get_best_pio_mode (ide_drive_t *drive, u8 mode_wanted, u8 max_mode, ide_pio_data_t *d);
1342 extern const ide_pio_timings_t ide_pio_timings[6];
1343
1344
1345 extern spinlock_t ide_lock;
1346 extern struct semaphore ide_cfg_sem;
1347 /*
1348 * Structure locking:
1349 *
1350 * ide_cfg_sem and ide_lock together protect changes to
1351 * ide_hwif_t->{next,hwgroup}
1352 * ide_drive_t->next
1353 *
1354 * ide_hwgroup_t->busy: ide_lock
1355 * ide_hwgroup_t->hwif: ide_lock
1356 * ide_hwif_t->mate: constant, no locking
1357 * ide_drive_t->hwif: constant, no locking
1358 */
1359
1360 #define local_irq_set(flags) do { local_save_flags((flags)); local_irq_enable(); } while (0)
1361
1362 extern struct bus_type ide_bus_type;
1363
1364 /* check if CACHE FLUSH (EXT) command is supported (bits defined in ATA-6) */
1365 #define ide_id_has_flush_cache(id) ((id)->cfs_enable_2 & 0x3000)
1366
1367 /* some Maxtor disks have bit 13 defined incorrectly so check bit 10 too */
1368 #define ide_id_has_flush_cache_ext(id) \
1369 (((id)->cfs_enable_2 & 0x2400) == 0x2400)
1370
1371 static inline int hwif_to_node(ide_hwif_t *hwif)
1372 {
1373 struct pci_dev *dev = hwif->pci_dev;
1374 return dev ? pcibus_to_node(dev->bus) : -1;
1375 }
1376
1377 #endif /* _IDE_H */
Linux kernel - Deliverables
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