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[PATCH] FUSE - file operations
[linux-2.6/x86.git] / include / linux / ide.h
bloba6dbb51ecd7b780bd4659ae569fed4f2368ac2d9
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 * This is the multiple IDE interface driver, as evolved from hd.c.
28 * It supports up to four IDE interfaces, on one or more IRQs (usually 14 & 15).
29 * There can be up to two drives per interface, as per the ATA-2 spec.
30 *
31 * Primary i/f: ide0: major=3; (hda) minor=0; (hdb) minor=64
32 * Secondary i/f: ide1: major=22; (hdc or hd1a) minor=0; (hdd or hd1b) minor=64
33 * Tertiary i/f: ide2: major=33; (hde) minor=0; (hdf) minor=64
34 * Quaternary i/f: ide3: major=34; (hdg) minor=0; (hdh) minor=64
35 */
36
37 /******************************************************************************
38 * IDE driver configuration options (play with these as desired):
39 *
40 * REALLY_SLOW_IO can be defined in ide.c and ide-cd.c, if necessary
41 */
42 #define INITIAL_MULT_COUNT 0 /* off=0; on=2,4,8,16,32, etc.. */
43
44 #ifndef SUPPORT_SLOW_DATA_PORTS /* 1 to support slow data ports */
45 #define SUPPORT_SLOW_DATA_PORTS 1 /* 0 to reduce kernel size */
46 #endif
47 #ifndef SUPPORT_VLB_SYNC /* 1 to support weird 32-bit chips */
48 #define SUPPORT_VLB_SYNC 1 /* 0 to reduce kernel size */
49 #endif
50 #ifndef OK_TO_RESET_CONTROLLER /* 1 needed for good error recovery */
51 #define OK_TO_RESET_CONTROLLER 1 /* 0 for use with AH2372A/B interface */
52 #endif
53
54 #ifndef DISABLE_IRQ_NOSYNC
55 #define DISABLE_IRQ_NOSYNC 0
56 #endif
57
58 /*
59 * Used to indicate "no IRQ", should be a value that cannot be an IRQ
60 * number.
61 */
62
63 #define IDE_NO_IRQ (-1)
64
65 /*
66 * "No user-serviceable parts" beyond this point :)
67 *****************************************************************************/
68
69 typedef unsigned char byte; /* used everywhere */
70
71 /*
72 * Probably not wise to fiddle with these
73 */
74 #define ERROR_MAX 8 /* Max read/write errors per sector */
75 #define ERROR_RESET 3 /* Reset controller every 4th retry */
76 #define ERROR_RECAL 1 /* Recalibrate every 2nd retry */
77
78 /*
79 * Tune flags
80 */
81 #define IDE_TUNE_NOAUTO 2
82 #define IDE_TUNE_AUTO 1
83 #define IDE_TUNE_DEFAULT 0
84
85 /*
86 * state flags
87 */
88
89 #define DMA_PIO_RETRY 1 /* retrying in PIO */
90
91 #define HWIF(drive) ((ide_hwif_t *)((drive)->hwif))
92 #define HWGROUP(drive) ((ide_hwgroup_t *)(HWIF(drive)->hwgroup))
93
94 /*
95 * Definitions for accessing IDE controller registers
96 */
97 #define IDE_NR_PORTS (10)
98
99 #define IDE_DATA_OFFSET (0)
100 #define IDE_ERROR_OFFSET (1)
101 #define IDE_NSECTOR_OFFSET (2)
102 #define IDE_SECTOR_OFFSET (3)
103 #define IDE_LCYL_OFFSET (4)
104 #define IDE_HCYL_OFFSET (5)
105 #define IDE_SELECT_OFFSET (6)
106 #define IDE_STATUS_OFFSET (7)
107 #define IDE_CONTROL_OFFSET (8)
108 #define IDE_IRQ_OFFSET (9)
109
110 #define IDE_FEATURE_OFFSET IDE_ERROR_OFFSET
111 #define IDE_COMMAND_OFFSET IDE_STATUS_OFFSET
112
113 #define IDE_CONTROL_OFFSET_HOB (7)
114
115 #define IDE_DATA_REG (HWIF(drive)->io_ports[IDE_DATA_OFFSET])
116 #define IDE_ERROR_REG (HWIF(drive)->io_ports[IDE_ERROR_OFFSET])
117 #define IDE_NSECTOR_REG (HWIF(drive)->io_ports[IDE_NSECTOR_OFFSET])
118 #define IDE_SECTOR_REG (HWIF(drive)->io_ports[IDE_SECTOR_OFFSET])
119 #define IDE_LCYL_REG (HWIF(drive)->io_ports[IDE_LCYL_OFFSET])
120 #define IDE_HCYL_REG (HWIF(drive)->io_ports[IDE_HCYL_OFFSET])
121 #define IDE_SELECT_REG (HWIF(drive)->io_ports[IDE_SELECT_OFFSET])
122 #define IDE_STATUS_REG (HWIF(drive)->io_ports[IDE_STATUS_OFFSET])
123 #define IDE_CONTROL_REG (HWIF(drive)->io_ports[IDE_CONTROL_OFFSET])
124 #define IDE_IRQ_REG (HWIF(drive)->io_ports[IDE_IRQ_OFFSET])
125
126 #define IDE_FEATURE_REG IDE_ERROR_REG
127 #define IDE_COMMAND_REG IDE_STATUS_REG
128 #define IDE_ALTSTATUS_REG IDE_CONTROL_REG
129 #define IDE_IREASON_REG IDE_NSECTOR_REG
130 #define IDE_BCOUNTL_REG IDE_LCYL_REG
131 #define IDE_BCOUNTH_REG IDE_HCYL_REG
132
133 #define OK_STAT(stat,good,bad) (((stat)&((good)|(bad)))==(good))
134 #define BAD_R_STAT (BUSY_STAT | ERR_STAT)
135 #define BAD_W_STAT (BAD_R_STAT | WRERR_STAT)
136 #define BAD_STAT (BAD_R_STAT | DRQ_STAT)
137 #define DRIVE_READY (READY_STAT | SEEK_STAT)
138 #define DATA_READY (DRQ_STAT)
139
140 #define BAD_CRC (ABRT_ERR | ICRC_ERR)
141
142 #define SATA_NR_PORTS (3) /* 16 possible ?? */
143
144 #define SATA_STATUS_OFFSET (0)
145 #define SATA_STATUS_REG (HWIF(drive)->sata_scr[SATA_STATUS_OFFSET])
146 #define SATA_ERROR_OFFSET (1)
147 #define SATA_ERROR_REG (HWIF(drive)->sata_scr[SATA_ERROR_OFFSET])
148 #define SATA_CONTROL_OFFSET (2)
149 #define SATA_CONTROL_REG (HWIF(drive)->sata_scr[SATA_CONTROL_OFFSET])
150
151 #define SATA_MISC_OFFSET (0)
152 #define SATA_MISC_REG (HWIF(drive)->sata_misc[SATA_MISC_OFFSET])
153 #define SATA_PHY_OFFSET (1)
154 #define SATA_PHY_REG (HWIF(drive)->sata_misc[SATA_PHY_OFFSET])
155 #define SATA_IEN_OFFSET (2)
156 #define SATA_IEN_REG (HWIF(drive)->sata_misc[SATA_IEN_OFFSET])
157
158 /*
159 * Our Physical Region Descriptor (PRD) table should be large enough
160 * to handle the biggest I/O request we are likely to see. Since requests
161 * can have no more than 256 sectors, and since the typical blocksize is
162 * two or more sectors, we could get by with a limit of 128 entries here for
163 * the usual worst case. Most requests seem to include some contiguous blocks,
164 * further reducing the number of table entries required.
165 *
166 * The driver reverts to PIO mode for individual requests that exceed
167 * this limit (possible with 512 byte blocksizes, eg. MSDOS f/s), so handling
168 * 100% of all crazy scenarios here is not necessary.
169 *
170 * As it turns out though, we must allocate a full 4KB page for this,
171 * so the two PRD tables (ide0 & ide1) will each get half of that,
172 * allowing each to have about 256 entries (8 bytes each) from this.
173 */
174 #define PRD_BYTES 8
175 #define PRD_ENTRIES 256
176
177 /*
178 * Some more useful definitions
179 */
180 #define PARTN_BITS 6 /* number of minor dev bits for partitions */
181 #define MAX_DRIVES 2 /* per interface; 2 assumed by lots of code */
182 #define SECTOR_SIZE 512
183 #define SECTOR_WORDS (SECTOR_SIZE / 4) /* number of 32bit words per sector */
184 #define IDE_LARGE_SEEK(b1,b2,t) (((b1) > (b2) + (t)) || ((b2) > (b1) + (t)))
185
186 /*
187 * Timeouts for various operations:
188 */
189 #define WAIT_DRQ (HZ/10) /* 100msec - spec allows up to 20ms */
190 #define WAIT_READY (5*HZ) /* 5sec - some laptops are very slow */
191 #define WAIT_PIDENTIFY (10*HZ) /* 10sec - should be less than 3ms (?), if all ATAPI CD is closed at boot */
192 #define WAIT_WORSTCASE (30*HZ) /* 30sec - worst case when spinning up */
193 #define WAIT_CMD (10*HZ) /* 10sec - maximum wait for an IRQ to happen */
194 #define WAIT_MIN_SLEEP (2*HZ/100) /* 20msec - minimum sleep time */
195
196 #define HOST(hwif,chipset) \
197 { \
198 return ((hwif)->chipset == chipset) ? 1 : 0; \
199 }
200
201 /*
202 * Check for an interrupt and acknowledge the interrupt status
203 */
204 struct hwif_s;
205 typedef int (ide_ack_intr_t)(struct hwif_s *);
206
207 #ifndef NO_DMA
208 #define NO_DMA 255
209 #endif
210
211 /*
212 * hwif_chipset_t is used to keep track of the specific hardware
213 * chipset used by each IDE interface, if known.
214 */
215 typedef enum { ide_unknown, ide_generic, ide_pci,
216 ide_cmd640, ide_dtc2278, ide_ali14xx,
217 ide_qd65xx, ide_umc8672, ide_ht6560b,
218 ide_rz1000, ide_trm290,
219 ide_cmd646, ide_cy82c693, ide_4drives,
220 ide_pmac, ide_etrax100, ide_acorn,
221 ide_forced
222 } hwif_chipset_t;
223
224 /*
225 * Structure to hold all information about the location of this port
226 */
227 typedef struct hw_regs_s {
228 unsigned long io_ports[IDE_NR_PORTS]; /* task file registers */
229 int irq; /* our irq number */
230 int dma; /* our dma entry */
231 ide_ack_intr_t *ack_intr; /* acknowledge interrupt */
232 hwif_chipset_t chipset;
233 } hw_regs_t;
234
235 /*
236 * Register new hardware with ide
237 */
238 int ide_register_hw(hw_regs_t *hw, struct hwif_s **hwifp);
239 int ide_register_hw_with_fixup(hw_regs_t *, struct hwif_s **, void (*)(struct hwif_s *));
240
241 /*
242 * Set up hw_regs_t structure before calling ide_register_hw (optional)
243 */
244 void ide_setup_ports( hw_regs_t *hw,
245 unsigned long base,
246 int *offsets,
247 unsigned long ctrl,
248 unsigned long intr,
249 ide_ack_intr_t *ack_intr,
250 #if 0
251 ide_io_ops_t *iops,
252 #endif
253 int irq);
254
255 static inline void ide_std_init_ports(hw_regs_t *hw,
256 unsigned long io_addr,
257 unsigned long ctl_addr)
258 {
259 unsigned int i;
260
261 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
262 hw->io_ports[i] = io_addr++;
263
264 hw->io_ports[IDE_CONTROL_OFFSET] = ctl_addr;
265 }
266
267 #include <asm/ide.h>
268
269 /* needed on alpha, x86/x86_64, ia64, mips, ppc32 and sh */
270 #ifndef IDE_ARCH_OBSOLETE_DEFAULTS
271 # define ide_default_io_base(index) (0)
272 # define ide_default_irq(base) (0)
273 # define ide_init_default_irq(base) (0)
274 #endif
275
276 /*
277 * ide_init_hwif_ports() is OBSOLETE and will be removed in 2.7 series.
278 * New ports shouldn't define IDE_ARCH_OBSOLETE_INIT in <asm/ide.h>.
279 */
280 #ifdef IDE_ARCH_OBSOLETE_INIT
281 static inline void ide_init_hwif_ports(hw_regs_t *hw,
282 unsigned long io_addr,
283 unsigned long ctl_addr,
284 int *irq)
285 {
286 if (!ctl_addr)
287 ide_std_init_ports(hw, io_addr, ide_default_io_ctl(io_addr));
288 else
289 ide_std_init_ports(hw, io_addr, ctl_addr);
290
291 if (irq)
292 *irq = 0;
293
294 hw->io_ports[IDE_IRQ_OFFSET] = 0;
295
296 #ifdef CONFIG_PPC32
297 if (ppc_ide_md.ide_init_hwif)
298 ppc_ide_md.ide_init_hwif(hw, io_addr, ctl_addr, irq);
299 #endif
300 }
301 #else
302 static inline void ide_init_hwif_ports(hw_regs_t *hw,
303 unsigned long io_addr,
304 unsigned long ctl_addr,
305 int *irq)
306 {
307 if (io_addr || ctl_addr)
308 printk(KERN_WARNING "%s: must not be called\n", __FUNCTION__);
309 }
310 #endif /* IDE_ARCH_OBSOLETE_INIT */
311
312 /* Currently only m68k, apus and m8xx need it */
313 #ifndef IDE_ARCH_ACK_INTR
314 # define ide_ack_intr(hwif) (1)
315 #endif
316
317 /* Currently only Atari needs it */
318 #ifndef IDE_ARCH_LOCK
319 # define ide_release_lock() do {} while (0)
320 # define ide_get_lock(hdlr, data) do {} while (0)
321 #endif /* IDE_ARCH_LOCK */
322
323 /*
324 * Now for the data we need to maintain per-drive: ide_drive_t
325 */
326
327 #define ide_scsi 0x21
328 #define ide_disk 0x20
329 #define ide_optical 0x7
330 #define ide_cdrom 0x5
331 #define ide_tape 0x1
332 #define ide_floppy 0x0
333
334 /*
335 * Special Driver Flags
336 *
337 * set_geometry : respecify drive geometry
338 * recalibrate : seek to cyl 0
339 * set_multmode : set multmode count
340 * set_tune : tune interface for drive
341 * serviced : service command
342 * reserved : unused
343 */
344 typedef union {
345 unsigned all : 8;
346 struct {
347 #if defined(__LITTLE_ENDIAN_BITFIELD)
348 unsigned set_geometry : 1;
349 unsigned recalibrate : 1;
350 unsigned set_multmode : 1;
351 unsigned set_tune : 1;
352 unsigned serviced : 1;
353 unsigned reserved : 3;
354 #elif defined(__BIG_ENDIAN_BITFIELD)
355 unsigned reserved : 3;
356 unsigned serviced : 1;
357 unsigned set_tune : 1;
358 unsigned set_multmode : 1;
359 unsigned recalibrate : 1;
360 unsigned set_geometry : 1;
361 #else
362 #error "Please fix <asm/byteorder.h>"
363 #endif
364 } b;
365 } special_t;
366
367 /*
368 * ATA DATA Register Special.
369 * ATA NSECTOR Count Register().
370 * ATAPI Byte Count Register.
371 * Channel index ordering pairs.
372 */
373 typedef union {
374 unsigned all :16;
375 struct {
376 #if defined(__LITTLE_ENDIAN_BITFIELD)
377 unsigned low :8; /* LSB */
378 unsigned high :8; /* MSB */
379 #elif defined(__BIG_ENDIAN_BITFIELD)
380 unsigned high :8; /* MSB */
381 unsigned low :8; /* LSB */
382 #else
383 #error "Please fix <asm/byteorder.h>"
384 #endif
385 } b;
386 } ata_nsector_t, ata_data_t, atapi_bcount_t, ata_index_t;
387
388 /*
389 * ATA-IDE Error Register
390 *
391 * mark : Bad address mark
392 * tzero : Couldn't find track 0
393 * abrt : Aborted Command
394 * mcr : Media Change Request
395 * id : ID field not found
396 * mce : Media Change Event
397 * ecc : Uncorrectable ECC error
398 * bdd : dual meaing
399 */
400 typedef union {
401 unsigned all :8;
402 struct {
403 #if defined(__LITTLE_ENDIAN_BITFIELD)
404 unsigned mark :1;
405 unsigned tzero :1;
406 unsigned abrt :1;
407 unsigned mcr :1;
408 unsigned id :1;
409 unsigned mce :1;
410 unsigned ecc :1;
411 unsigned bdd :1;
412 #elif defined(__BIG_ENDIAN_BITFIELD)
413 unsigned bdd :1;
414 unsigned ecc :1;
415 unsigned mce :1;
416 unsigned id :1;
417 unsigned mcr :1;
418 unsigned abrt :1;
419 unsigned tzero :1;
420 unsigned mark :1;
421 #else
422 #error "Please fix <asm/byteorder.h>"
423 #endif
424 } b;
425 } ata_error_t;
426
427 /*
428 * ATA-IDE Select Register, aka Device-Head
429 *
430 * head : always zeros here
431 * unit : drive select number: 0/1
432 * bit5 : always 1
433 * lba : using LBA instead of CHS
434 * bit7 : always 1
435 */
436 typedef union {
437 unsigned all : 8;
438 struct {
439 #if defined(__LITTLE_ENDIAN_BITFIELD)
440 unsigned head : 4;
441 unsigned unit : 1;
442 unsigned bit5 : 1;
443 unsigned lba : 1;
444 unsigned bit7 : 1;
445 #elif defined(__BIG_ENDIAN_BITFIELD)
446 unsigned bit7 : 1;
447 unsigned lba : 1;
448 unsigned bit5 : 1;
449 unsigned unit : 1;
450 unsigned head : 4;
451 #else
452 #error "Please fix <asm/byteorder.h>"
453 #endif
454 } b;
455 } select_t, ata_select_t;
456
457 /*
458 * The ATA-IDE Status Register.
459 * The ATAPI Status Register.
460 *
461 * check : Error occurred
462 * idx : Index Error
463 * corr : Correctable error occurred
464 * drq : Data is request by the device
465 * dsc : Disk Seek Complete : ata
466 * : Media access command finished : atapi
467 * df : Device Fault : ata
468 * : Reserved : atapi
469 * drdy : Ready, Command Mode Capable : ata
470 * : Ignored for ATAPI commands : atapi
471 * bsy : Disk is Busy
472 * : The device has access to the command block
473 */
474 typedef union {
475 unsigned all :8;
476 struct {
477 #if defined(__LITTLE_ENDIAN_BITFIELD)
478 unsigned check :1;
479 unsigned idx :1;
480 unsigned corr :1;
481 unsigned drq :1;
482 unsigned dsc :1;
483 unsigned df :1;
484 unsigned drdy :1;
485 unsigned bsy :1;
486 #elif defined(__BIG_ENDIAN_BITFIELD)
487 unsigned bsy :1;
488 unsigned drdy :1;
489 unsigned df :1;
490 unsigned dsc :1;
491 unsigned drq :1;
492 unsigned corr :1;
493 unsigned idx :1;
494 unsigned check :1;
495 #else
496 #error "Please fix <asm/byteorder.h>"
497 #endif
498 } b;
499 } ata_status_t, atapi_status_t;
500
501 /*
502 * ATA-IDE Control Register
503 *
504 * bit0 : Should be set to zero
505 * nIEN : device INTRQ to host
506 * SRST : host soft reset bit
507 * bit3 : ATA-2 thingy, Should be set to 1
508 * reserved456 : Reserved
509 * HOB : 48-bit address ordering, High Ordered Bit
510 */
511 typedef union {
512 unsigned all : 8;
513 struct {
514 #if defined(__LITTLE_ENDIAN_BITFIELD)
515 unsigned bit0 : 1;
516 unsigned nIEN : 1;
517 unsigned SRST : 1;
518 unsigned bit3 : 1;
519 unsigned reserved456 : 3;
520 unsigned HOB : 1;
521 #elif defined(__BIG_ENDIAN_BITFIELD)
522 unsigned HOB : 1;
523 unsigned reserved456 : 3;
524 unsigned bit3 : 1;
525 unsigned SRST : 1;
526 unsigned nIEN : 1;
527 unsigned bit0 : 1;
528 #else
529 #error "Please fix <asm/byteorder.h>"
530 #endif
531 } b;
532 } ata_control_t;
533
534 /*
535 * ATAPI Feature Register
536 *
537 * dma : Using DMA or PIO
538 * reserved321 : Reserved
539 * reserved654 : Reserved (Tag Type)
540 * reserved7 : Reserved
541 */
542 typedef union {
543 unsigned all :8;
544 struct {
545 #if defined(__LITTLE_ENDIAN_BITFIELD)
546 unsigned dma :1;
547 unsigned reserved321 :3;
548 unsigned reserved654 :3;
549 unsigned reserved7 :1;
550 #elif defined(__BIG_ENDIAN_BITFIELD)
551 unsigned reserved7 :1;
552 unsigned reserved654 :3;
553 unsigned reserved321 :3;
554 unsigned dma :1;
555 #else
556 #error "Please fix <asm/byteorder.h>"
557 #endif
558 } b;
559 } atapi_feature_t;
560
561 /*
562 * ATAPI Interrupt Reason Register.
563 *
564 * cod : Information transferred is command (1) or data (0)
565 * io : The device requests us to read (1) or write (0)
566 * reserved : Reserved
567 */
568 typedef union {
569 unsigned all :8;
570 struct {
571 #if defined(__LITTLE_ENDIAN_BITFIELD)
572 unsigned cod :1;
573 unsigned io :1;
574 unsigned reserved :6;
575 #elif defined(__BIG_ENDIAN_BITFIELD)
576 unsigned reserved :6;
577 unsigned io :1;
578 unsigned cod :1;
579 #else
580 #error "Please fix <asm/byteorder.h>"
581 #endif
582 } b;
583 } atapi_ireason_t;
584
585 /*
586 * The ATAPI error register.
587 *
588 * ili : Illegal Length Indication
589 * eom : End Of Media Detected
590 * abrt : Aborted command - As defined by ATA
591 * mcr : Media Change Requested - As defined by ATA
592 * sense_key : Sense key of the last failed packet command
593 */
594 typedef union {
595 unsigned all :8;
596 struct {
597 #if defined(__LITTLE_ENDIAN_BITFIELD)
598 unsigned ili :1;
599 unsigned eom :1;
600 unsigned abrt :1;
601 unsigned mcr :1;
602 unsigned sense_key :4;
603 #elif defined(__BIG_ENDIAN_BITFIELD)
604 unsigned sense_key :4;
605 unsigned mcr :1;
606 unsigned abrt :1;
607 unsigned eom :1;
608 unsigned ili :1;
609 #else
610 #error "Please fix <asm/byteorder.h>"
611 #endif
612 } b;
613 } atapi_error_t;
614
615 /*
616 * ATAPI floppy Drive Select Register
617 *
618 * sam_lun : Logical unit number
619 * reserved3 : Reserved
620 * drv : The responding drive will be drive 0 (0) or drive 1 (1)
621 * one5 : Should be set to 1
622 * reserved6 : Reserved
623 * one7 : Should be set to 1
624 */
625 typedef union {
626 unsigned all :8;
627 struct {
628 #if defined(__LITTLE_ENDIAN_BITFIELD)
629 unsigned sam_lun :3;
630 unsigned reserved3 :1;
631 unsigned drv :1;
632 unsigned one5 :1;
633 unsigned reserved6 :1;
634 unsigned one7 :1;
635 #elif defined(__BIG_ENDIAN_BITFIELD)
636 unsigned one7 :1;
637 unsigned reserved6 :1;
638 unsigned one5 :1;
639 unsigned drv :1;
640 unsigned reserved3 :1;
641 unsigned sam_lun :3;
642 #else
643 #error "Please fix <asm/byteorder.h>"
644 #endif
645 } b;
646 } atapi_select_t;
647
648 /*
649 * Status returned from various ide_ functions
650 */
651 typedef enum {
652 ide_stopped, /* no drive operation was started */
653 ide_started, /* a drive operation was started, handler was set */
654 } ide_startstop_t;
655
656 struct ide_driver_s;
657 struct ide_settings_s;
658
659 typedef struct ide_drive_s {
660 char name[4]; /* drive name, such as "hda" */
661 char driver_req[10]; /* requests specific driver */
662
663 request_queue_t *queue; /* request queue */
664
665 struct request *rq; /* current request */
666 struct ide_drive_s *next; /* circular list of hwgroup drives */
667 void *driver_data; /* extra driver data */
668 struct hd_driveid *id; /* drive model identification info */
669 struct proc_dir_entry *proc; /* /proc/ide/ directory entry */
670 struct ide_settings_s *settings;/* /proc/ide/ drive settings */
671 char devfs_name[64]; /* devfs crap */
672
673 struct hwif_s *hwif; /* actually (ide_hwif_t *) */
674
675 unsigned long sleep; /* sleep until this time */
676 unsigned long service_start; /* time we started last request */
677 unsigned long service_time; /* service time of last request */
678 unsigned long timeout; /* max time to wait for irq */
679
680 special_t special; /* special action flags */
681 select_t select; /* basic drive/head select reg value */
682
683 u8 keep_settings; /* restore settings after drive reset */
684 u8 autodma; /* device can safely use dma on host */
685 u8 using_dma; /* disk is using dma for read/write */
686 u8 retry_pio; /* retrying dma capable host in pio */
687 u8 state; /* retry state */
688 u8 waiting_for_dma; /* dma currently in progress */
689 u8 unmask; /* okay to unmask other irqs */
690 u8 bswap; /* byte swap data */
691 u8 dsc_overlap; /* DSC overlap */
692 u8 nice1; /* give potential excess bandwidth */
693
694 unsigned present : 1; /* drive is physically present */
695 unsigned dead : 1; /* device ejected hint */
696 unsigned id_read : 1; /* 1=id read from disk 0 = synthetic */
697 unsigned noprobe : 1; /* from: hdx=noprobe */
698 unsigned removable : 1; /* 1 if need to do check_media_change */
699 unsigned attach : 1; /* needed for removable devices */
700 unsigned is_flash : 1; /* 1 if probed as flash */
701 unsigned forced_geom : 1; /* 1 if hdx=c,h,s was given at boot */
702 unsigned no_unmask : 1; /* disallow setting unmask bit */
703 unsigned no_io_32bit : 1; /* disallow enabling 32bit I/O */
704 unsigned atapi_overlap : 1; /* ATAPI overlap (not supported) */
705 unsigned nice0 : 1; /* give obvious excess bandwidth */
706 unsigned nice2 : 1; /* give a share in our own bandwidth */
707 unsigned doorlocking : 1; /* for removable only: door lock/unlock works */
708 unsigned autotune : 2; /* 0=default, 1=autotune, 2=noautotune */
709 unsigned remap_0_to_1 : 1; /* 0=noremap, 1=remap 0->1 (for EZDrive) */
710 unsigned blocked : 1; /* 1=powermanagment told us not to do anything, so sleep nicely */
711 unsigned vdma : 1; /* 1=doing PIO over DMA 0=doing normal DMA */
712 unsigned addressing; /* : 3;
713 * 0=28-bit
714 * 1=48-bit
715 * 2=48-bit doing 28-bit
716 * 3=64-bit
717 */
718 unsigned scsi : 1; /* 0=default, 1=ide-scsi emulation */
719 unsigned sleeping : 1; /* 1=sleeping & sleep field valid */
720 unsigned post_reset : 1;
721
722 u8 quirk_list; /* considered quirky, set for a specific host */
723 u8 init_speed; /* transfer rate set at boot */
724 u8 pio_speed; /* unused by core, used by some drivers for fallback from DMA */
725 u8 current_speed; /* current transfer rate set */
726 u8 dn; /* now wide spread use */
727 u8 wcache; /* status of write cache */
728 u8 acoustic; /* acoustic management */
729 u8 media; /* disk, cdrom, tape, floppy, ... */
730 u8 ctl; /* "normal" value for IDE_CONTROL_REG */
731 u8 ready_stat; /* min status value for drive ready */
732 u8 mult_count; /* current multiple sector setting */
733 u8 mult_req; /* requested multiple sector setting */
734 u8 tune_req; /* requested drive tuning setting */
735 u8 io_32bit; /* 0=16-bit, 1=32-bit, 2/3=32bit+sync */
736 u8 bad_wstat; /* used for ignoring WRERR_STAT */
737 u8 nowerr; /* used for ignoring WRERR_STAT */
738 u8 sect0; /* offset of first sector for DM6:DDO */
739 u8 head; /* "real" number of heads */
740 u8 sect; /* "real" sectors per track */
741 u8 bios_head; /* BIOS/fdisk/LILO number of heads */
742 u8 bios_sect; /* BIOS/fdisk/LILO sectors per track */
743
744 unsigned int bios_cyl; /* BIOS/fdisk/LILO number of cyls */
745 unsigned int cyl; /* "real" number of cyls */
746 unsigned int drive_data; /* use by tuneproc/selectproc */
747 unsigned int usage; /* current "open()" count for drive */
748 unsigned int failures; /* current failure count */
749 unsigned int max_failures; /* maximum allowed failure count */
750
751 u64 capacity64; /* total number of sectors */
752
753 int lun; /* logical unit */
754 int crc_count; /* crc counter to reduce drive speed */
755 struct list_head list;
756 struct device gendev;
757 struct semaphore gendev_rel_sem; /* to deal with device release() */
758 } ide_drive_t;
759
760 #define to_ide_device(dev)container_of(dev, ide_drive_t, gendev)
761
762 #define IDE_CHIPSET_PCI_MASK \
763 ((1<<ide_pci)|(1<<ide_cmd646)|(1<<ide_ali14xx))
764 #define IDE_CHIPSET_IS_PCI(c) ((IDE_CHIPSET_PCI_MASK >> (c)) & 1)
765
766 struct ide_pci_device_s;
767
768 typedef struct hwif_s {
769 struct hwif_s *next; /* for linked-list in ide_hwgroup_t */
770 struct hwif_s *mate; /* other hwif from same PCI chip */
771 struct hwgroup_s *hwgroup; /* actually (ide_hwgroup_t *) */
772 struct proc_dir_entry *proc; /* /proc/ide/ directory entry */
773
774 char name[6]; /* name of interface, eg. "ide0" */
775
776 /* task file registers for pata and sata */
777 unsigned long io_ports[IDE_NR_PORTS];
778 unsigned long sata_scr[SATA_NR_PORTS];
779 unsigned long sata_misc[SATA_NR_PORTS];
780
781 hw_regs_t hw; /* Hardware info */
782 ide_drive_t drives[MAX_DRIVES]; /* drive info */
783
784 u8 major; /* our major number */
785 u8 index; /* 0 for ide0; 1 for ide1; ... */
786 u8 channel; /* for dual-port chips: 0=primary, 1=secondary */
787 u8 straight8; /* Alan's straight 8 check */
788 u8 bus_state; /* power state of the IDE bus */
789
790 u8 atapi_dma; /* host supports atapi_dma */
791 u8 ultra_mask;
792 u8 mwdma_mask;
793 u8 swdma_mask;
794
795 hwif_chipset_t chipset; /* sub-module for tuning.. */
796
797 struct pci_dev *pci_dev; /* for pci chipsets */
798 struct ide_pci_device_s *cds; /* chipset device struct */
799
800 void (*rw_disk)(ide_drive_t *, struct request *);
801
802 #if 0
803 ide_hwif_ops_t *hwifops;
804 #else
805 /* routine to tune PIO mode for drives */
806 void (*tuneproc)(ide_drive_t *, u8);
807 /* routine to retune DMA modes for drives */
808 int (*speedproc)(ide_drive_t *, u8);
809 /* tweaks hardware to select drive */
810 void (*selectproc)(ide_drive_t *);
811 /* chipset polling based on hba specifics */
812 int (*reset_poll)(ide_drive_t *);
813 /* chipset specific changes to default for device-hba resets */
814 void (*pre_reset)(ide_drive_t *);
815 /* routine to reset controller after a disk reset */
816 void (*resetproc)(ide_drive_t *);
817 /* special interrupt handling for shared pci interrupts */
818 void (*intrproc)(ide_drive_t *);
819 /* special host masking for drive selection */
820 void (*maskproc)(ide_drive_t *, int);
821 /* check host's drive quirk list */
822 int (*quirkproc)(ide_drive_t *);
823 /* driver soft-power interface */
824 int (*busproc)(ide_drive_t *, int);
825 // /* host rate limiter */
826 // u8 (*ratemask)(ide_drive_t *);
827 // /* device rate limiter */
828 // u8 (*ratefilter)(ide_drive_t *, u8);
829 #endif
830
831 void (*ata_input_data)(ide_drive_t *, void *, u32);
832 void (*ata_output_data)(ide_drive_t *, void *, u32);
833
834 void (*atapi_input_bytes)(ide_drive_t *, void *, u32);
835 void (*atapi_output_bytes)(ide_drive_t *, void *, u32);
836
837 int (*dma_setup)(ide_drive_t *);
838 void (*dma_exec_cmd)(ide_drive_t *, u8);
839 void (*dma_start)(ide_drive_t *);
840 int (*ide_dma_end)(ide_drive_t *drive);
841 int (*ide_dma_check)(ide_drive_t *drive);
842 int (*ide_dma_on)(ide_drive_t *drive);
843 int (*ide_dma_off_quietly)(ide_drive_t *drive);
844 int (*ide_dma_test_irq)(ide_drive_t *drive);
845 int (*ide_dma_host_on)(ide_drive_t *drive);
846 int (*ide_dma_host_off)(ide_drive_t *drive);
847 int (*ide_dma_lostirq)(ide_drive_t *drive);
848 int (*ide_dma_timeout)(ide_drive_t *drive);
849
850 void (*OUTB)(u8 addr, unsigned long port);
851 void (*OUTBSYNC)(ide_drive_t *drive, u8 addr, unsigned long port);
852 void (*OUTW)(u16 addr, unsigned long port);
853 void (*OUTL)(u32 addr, unsigned long port);
854 void (*OUTSW)(unsigned long port, void *addr, u32 count);
855 void (*OUTSL)(unsigned long port, void *addr, u32 count);
856
857 u8 (*INB)(unsigned long port);
858 u16 (*INW)(unsigned long port);
859 u32 (*INL)(unsigned long port);
860 void (*INSW)(unsigned long port, void *addr, u32 count);
861 void (*INSL)(unsigned long port, void *addr, u32 count);
862
863 /* dma physical region descriptor table (cpu view) */
864 unsigned int *dmatable_cpu;
865 /* dma physical region descriptor table (dma view) */
866 dma_addr_t dmatable_dma;
867 /* Scatter-gather list used to build the above */
868 struct scatterlist *sg_table;
869 int sg_max_nents; /* Maximum number of entries in it */
870 int sg_nents; /* Current number of entries in it */
871 int sg_dma_direction; /* dma transfer direction */
872
873 /* data phase of the active command (currently only valid for PIO/DMA) */
874 int data_phase;
875
876 unsigned int nsect;
877 unsigned int nleft;
878 unsigned int cursg;
879 unsigned int cursg_ofs;
880
881 int mmio; /* hosts iomio (0) or custom (2) select */
882 int rqsize; /* max sectors per request */
883 int irq; /* our irq number */
884
885 unsigned long dma_master; /* reference base addr dmabase */
886 unsigned long dma_base; /* base addr for dma ports */
887 unsigned long dma_command; /* dma command register */
888 unsigned long dma_vendor1; /* dma vendor 1 register */
889 unsigned long dma_status; /* dma status register */
890 unsigned long dma_vendor3; /* dma vendor 3 register */
891 unsigned long dma_prdtable; /* actual prd table address */
892 unsigned long dma_base2; /* extended base addr for dma ports */
893
894 unsigned dma_extra; /* extra addr for dma ports */
895 unsigned long config_data; /* for use by chipset-specific code */
896 unsigned long select_data; /* for use by chipset-specific code */
897
898 unsigned noprobe : 1; /* don't probe for this interface */
899 unsigned present : 1; /* this interface exists */
900 unsigned hold : 1; /* this interface is always present */
901 unsigned serialized : 1; /* serialized all channel operation */
902 unsigned sharing_irq: 1; /* 1 = sharing irq with another hwif */
903 unsigned reset : 1; /* reset after probe */
904 unsigned autodma : 1; /* auto-attempt using DMA at boot */
905 unsigned udma_four : 1; /* 1=ATA-66 capable, 0=default */
906 unsigned no_lba48 : 1; /* 1 = cannot do LBA48 */
907 unsigned no_lba48_dma : 1; /* 1 = cannot do LBA48 DMA */
908 unsigned no_dsc : 1; /* 0 default, 1 dsc_overlap disabled */
909 unsigned auto_poll : 1; /* supports nop auto-poll */
910 unsigned sg_mapped : 1; /* sg_table and sg_nents are ready */
911
912 struct device gendev;
913 struct semaphore gendev_rel_sem; /* To deal with device release() */
914
915 void *hwif_data; /* extra hwif data */
916
917 unsigned dma;
918
919 void (*led_act)(void *data, int rw);
920 } ____cacheline_maxaligned_in_smp ide_hwif_t;
921
922 /*
923 * internal ide interrupt handler type
924 */
925 typedef ide_startstop_t (ide_pre_handler_t)(ide_drive_t *, struct request *);
926 typedef ide_startstop_t (ide_handler_t)(ide_drive_t *);
927 typedef int (ide_expiry_t)(ide_drive_t *);
928
929 typedef struct hwgroup_s {
930 /* irq handler, if active */
931 ide_startstop_t (*handler)(ide_drive_t *);
932 /* irq handler, suspended if active */
933 ide_startstop_t (*handler_save)(ide_drive_t *);
934 /* BOOL: protects all fields below */
935 volatile int busy;
936 /* BOOL: wake us up on timer expiry */
937 unsigned int sleeping : 1;
938 /* BOOL: polling active & poll_timeout field valid */
939 unsigned int polling : 1;
940 /* current drive */
941 ide_drive_t *drive;
942 /* ptr to current hwif in linked-list */
943 ide_hwif_t *hwif;
944
945 /* for pci chipsets */
946 struct pci_dev *pci_dev;
947 /* chipset device struct */
948 struct ide_pci_device_s *cds;
949
950 /* current request */
951 struct request *rq;
952 /* failsafe timer */
953 struct timer_list timer;
954 /* local copy of current write rq */
955 struct request wrq;
956 /* timeout value during long polls */
957 unsigned long poll_timeout;
958 /* queried upon timeouts */
959 int (*expiry)(ide_drive_t *);
960 /* ide_system_bus_speed */
961 int pio_clock;
962
963 unsigned char cmd_buf[4];
964 } ide_hwgroup_t;
965
966 /* structure attached to the request for IDE_TASK_CMDS */
967
968 /*
969 * configurable drive settings
970 */
971
972 #define TYPE_INT 0
973 #define TYPE_INTA 1
974 #define TYPE_BYTE 2
975 #define TYPE_SHORT 3
976
977 #define SETTING_READ (1 << 0)
978 #define SETTING_WRITE (1 << 1)
979 #define SETTING_RW (SETTING_READ | SETTING_WRITE)
980
981 typedef int (ide_procset_t)(ide_drive_t *, int);
982 typedef struct ide_settings_s {
983 char *name;
984 int rw;
985 int read_ioctl;
986 int write_ioctl;
987 int data_type;
988 int min;
989 int max;
990 int mul_factor;
991 int div_factor;
992 void *data;
993 ide_procset_t *set;
994 int auto_remove;
995 struct ide_settings_s *next;
996 } ide_settings_t;
997
998 extern struct semaphore ide_setting_sem;
999 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);
1000 extern ide_settings_t *ide_find_setting_by_name(ide_drive_t *drive, char *name);
1001 extern int ide_read_setting(ide_drive_t *t, ide_settings_t *setting);
1002 extern int ide_write_setting(ide_drive_t *drive, ide_settings_t *setting, int val);
1003 extern void ide_add_generic_settings(ide_drive_t *drive);
1004
1005 /*
1006 * /proc/ide interface
1007 */
1008 typedef struct {
1009 const char *name;
1010 mode_t mode;
1011 read_proc_t *read_proc;
1012 write_proc_t *write_proc;
1013 } ide_proc_entry_t;
1014
1015 #ifdef CONFIG_PROC_FS
1016 extern struct proc_dir_entry *proc_ide_root;
1017
1018 extern void proc_ide_create(void);
1019 extern void proc_ide_destroy(void);
1020 extern void create_proc_ide_interfaces(void);
1021 void destroy_proc_ide_interface(ide_hwif_t *);
1022 extern void ide_add_proc_entries(struct proc_dir_entry *, ide_proc_entry_t *, void *);
1023 extern void ide_remove_proc_entries(struct proc_dir_entry *, ide_proc_entry_t *);
1024 read_proc_t proc_ide_read_capacity;
1025 read_proc_t proc_ide_read_geometry;
1026
1027 #ifdef CONFIG_BLK_DEV_IDEPCI
1028 void ide_pci_create_host_proc(const char *, get_info_t *);
1029 #endif
1030
1031 /*
1032 * Standard exit stuff:
1033 */
1034 #define PROC_IDE_READ_RETURN(page,start,off,count,eof,len) \
1035 { \
1036 len -= off; \
1037 if (len < count) { \
1038 *eof = 1; \
1039 if (len <= 0) \
1040 return 0; \
1041 } else \
1042 len = count; \
1043 *start = page + off; \
1044 return len; \
1045 }
1046 #else
1047 static inline void create_proc_ide_interfaces(void) { ; }
1048 static inline void destroy_proc_ide_interface(ide_hwif_t *hwif) { ; }
1049 #define PROC_IDE_READ_RETURN(page,start,off,count,eof,len) return 0;
1050 #endif
1051
1052 /*
1053 * Power Management step value (rq->pm->pm_step).
1054 *
1055 * The step value starts at 0 (ide_pm_state_start_suspend) for a
1056 * suspend operation or 1000 (ide_pm_state_start_resume) for a
1057 * resume operation.
1058 *
1059 * For each step, the core calls the subdriver start_power_step() first.
1060 * This can return:
1061 * - ide_stopped : In this case, the core calls us back again unless
1062 * step have been set to ide_power_state_completed.
1063 * - ide_started : In this case, the channel is left busy until an
1064 * async event (interrupt) occurs.
1065 * Typically, start_power_step() will issue a taskfile request with
1066 * do_rw_taskfile().
1067 *
1068 * Upon reception of the interrupt, the core will call complete_power_step()
1069 * with the error code if any. This routine should update the step value
1070 * and return. It should not start a new request. The core will call
1071 * start_power_step for the new step value, unless step have been set to
1072 * ide_power_state_completed.
1073 *
1074 * Subdrivers are expected to define their own additional power
1075 * steps from 1..999 for suspend and from 1001..1999 for resume,
1076 * other values are reserved for future use.
1077 */
1078
1079 enum {
1080 ide_pm_state_completed = -1,
1081 ide_pm_state_start_suspend = 0,
1082 ide_pm_state_start_resume = 1000,
1083 };
1084
1085 /*
1086 * Subdrivers support.
1087 */
1088 typedef struct ide_driver_s {
1089 struct module *owner;
1090 const char *version;
1091 u8 media;
1092 unsigned supports_dsc_overlap : 1;
1093 ide_startstop_t (*do_request)(ide_drive_t *, struct request *, sector_t);
1094 int (*end_request)(ide_drive_t *, int, int);
1095 ide_startstop_t (*error)(ide_drive_t *, struct request *rq, u8, u8);
1096 ide_startstop_t (*abort)(ide_drive_t *, struct request *rq);
1097 int (*ioctl)(ide_drive_t *, struct inode *, struct file *, unsigned int, unsigned long);
1098 ide_proc_entry_t *proc;
1099 void (*ata_prebuilder)(ide_drive_t *);
1100 void (*atapi_prebuilder)(ide_drive_t *);
1101 struct device_driver gen_driver;
1102 } ide_driver_t;
1103
1104 int generic_ide_ioctl(ide_drive_t *, struct file *, struct block_device *, unsigned, unsigned long);
1105
1106 /*
1107 * ide_hwifs[] is the master data structure used to keep track
1108 * of just about everything in ide.c. Whenever possible, routines
1109 * should be using pointers to a drive (ide_drive_t *) or
1110 * pointers to a hwif (ide_hwif_t *), rather than indexing this
1111 * structure directly (the allocation/layout may change!).
1112 *
1113 */
1114 #ifndef _IDE_C
1115 extern ide_hwif_t ide_hwifs[]; /* master data repository */
1116 #endif
1117 extern int noautodma;
1118
1119 extern int ide_end_request (ide_drive_t *drive, int uptodate, int nrsecs);
1120 extern int __ide_end_request (ide_drive_t *drive, struct request *rq, int uptodate, int nrsecs);
1121
1122 /*
1123 * This is used on exit from the driver to designate the next irq handler
1124 * and also to start the safety timer.
1125 */
1126 extern void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler, unsigned int timeout, ide_expiry_t *expiry);
1127
1128 /*
1129 * This is used on exit from the driver to designate the next irq handler
1130 * and start the safety time safely and atomically from the IRQ handler
1131 * with respect to the command issue (which it also does)
1132 */
1133 extern void ide_execute_command(ide_drive_t *, task_ioreg_t cmd, ide_handler_t *, unsigned int, ide_expiry_t *);
1134
1135 ide_startstop_t __ide_error(ide_drive_t *, struct request *, u8, u8);
1136
1137 /*
1138 * ide_error() takes action based on the error returned by the controller.
1139 * The caller should return immediately after invoking this.
1140 *
1141 * (drive, msg, status)
1142 */
1143 ide_startstop_t ide_error (ide_drive_t *drive, const char *msg, byte stat);
1144
1145 ide_startstop_t __ide_abort(ide_drive_t *, struct request *);
1146
1147 /*
1148 * Abort a running command on the controller triggering the abort
1149 * from a host side, non error situation
1150 * (drive, msg)
1151 */
1152 extern ide_startstop_t ide_abort(ide_drive_t *, const char *);
1153
1154 extern void ide_fix_driveid(struct hd_driveid *);
1155 /*
1156 * ide_fixstring() cleans up and (optionally) byte-swaps a text string,
1157 * removing leading/trailing blanks and compressing internal blanks.
1158 * It is primarily used to tidy up the model name/number fields as
1159 * returned by the WIN_[P]IDENTIFY commands.
1160 *
1161 * (s, bytecount, byteswap)
1162 */
1163 extern void ide_fixstring(u8 *, const int, const int);
1164
1165 /*
1166 * This routine busy-waits for the drive status to be not "busy".
1167 * It then checks the status for all of the "good" bits and none
1168 * of the "bad" bits, and if all is okay it returns 0. All other
1169 * cases return 1 after doing "*startstop = ide_error()", and the
1170 * caller should return the updated value of "startstop" in this case.
1171 * "startstop" is unchanged when the function returns 0;
1172 * (startstop, drive, good, bad, timeout)
1173 */
1174 extern int ide_wait_stat(ide_startstop_t *, ide_drive_t *, u8, u8, unsigned long);
1175
1176 /*
1177 * Start a reset operation for an IDE interface.
1178 * The caller should return immediately after invoking this.
1179 */
1180 extern ide_startstop_t ide_do_reset (ide_drive_t *);
1181
1182 /*
1183 * This function is intended to be used prior to invoking ide_do_drive_cmd().
1184 */
1185 extern void ide_init_drive_cmd (struct request *rq);
1186
1187 /*
1188 * this function returns error location sector offset in case of a write error
1189 */
1190 extern u64 ide_get_error_location(ide_drive_t *, char *);
1191
1192 /*
1193 * "action" parameter type for ide_do_drive_cmd() below.
1194 */
1195 typedef enum {
1196 ide_wait, /* insert rq at end of list, and wait for it */
1197 ide_next, /* insert rq immediately after current request */
1198 ide_preempt, /* insert rq in front of current request */
1199 ide_head_wait, /* insert rq in front of current request and wait for it */
1200 ide_end /* insert rq at end of list, but don't wait for it */
1201 } ide_action_t;
1202
1203 /*
1204 * This function issues a special IDE device request
1205 * onto the request queue.
1206 *
1207 * If action is ide_wait, then the rq is queued at the end of the
1208 * request queue, and the function sleeps until it has been processed.
1209 * This is for use when invoked from an ioctl handler.
1210 *
1211 * If action is ide_preempt, then the rq is queued at the head of
1212 * the request queue, displacing the currently-being-processed
1213 * request and this function returns immediately without waiting
1214 * for the new rq to be completed. This is VERY DANGEROUS, and is
1215 * intended for careful use by the ATAPI tape/cdrom driver code.
1216 *
1217 * If action is ide_next, then the rq is queued immediately after
1218 * the currently-being-processed-request (if any), and the function
1219 * returns without waiting for the new rq to be completed. As above,
1220 * This is VERY DANGEROUS, and is intended for careful use by the
1221 * ATAPI tape/cdrom driver code.
1222 *
1223 * If action is ide_end, then the rq is queued at the end of the
1224 * request queue, and the function returns immediately without waiting
1225 * for the new rq to be completed. This is again intended for careful
1226 * use by the ATAPI tape/cdrom driver code.
1227 */
1228 extern int ide_do_drive_cmd(ide_drive_t *, struct request *, ide_action_t);
1229
1230 /*
1231 * Clean up after success/failure of an explicit drive cmd.
1232 * stat/err are used only when (HWGROUP(drive)->rq->cmd == IDE_DRIVE_CMD).
1233 * stat/err are used only when (HWGROUP(drive)->rq->cmd == IDE_DRIVE_TASK_MASK).
1234 *
1235 * (ide_drive_t *drive, u8 stat, u8 err)
1236 */
1237 extern void ide_end_drive_cmd(ide_drive_t *, u8, u8);
1238
1239 /*
1240 * Issue ATA command and wait for completion.
1241 * Use for implementing commands in kernel
1242 *
1243 * (ide_drive_t *drive, u8 cmd, u8 nsect, u8 feature, u8 sectors, u8 *buf)
1244 */
1245 extern int ide_wait_cmd(ide_drive_t *, u8, u8, u8, u8, u8 *);
1246
1247 typedef struct ide_task_s {
1248 /*
1249 * struct hd_drive_task_hdr tf;
1250 * task_struct_t tf;
1251 * struct hd_drive_hob_hdr hobf;
1252 * hob_struct_t hobf;
1253 */
1254 task_ioreg_t tfRegister[8];
1255 task_ioreg_t hobRegister[8];
1256 ide_reg_valid_t tf_out_flags;
1257 ide_reg_valid_t tf_in_flags;
1258 int data_phase;
1259 int command_type;
1260 ide_pre_handler_t *prehandler;
1261 ide_handler_t *handler;
1262 struct request *rq; /* copy of request */
1263 void *special; /* valid_t generally */
1264 } ide_task_t;
1265
1266 extern u32 ide_read_24(ide_drive_t *);
1267
1268 extern void SELECT_DRIVE(ide_drive_t *);
1269 extern void SELECT_INTERRUPT(ide_drive_t *);
1270 extern void SELECT_MASK(ide_drive_t *, int);
1271 extern void QUIRK_LIST(ide_drive_t *);
1272
1273 extern int drive_is_ready(ide_drive_t *);
1274 extern int wait_for_ready(ide_drive_t *, int /* timeout */);
1275
1276 /*
1277 * taskfile io for disks for now...and builds request from ide_ioctl
1278 */
1279 extern ide_startstop_t do_rw_taskfile(ide_drive_t *, ide_task_t *);
1280
1281 /*
1282 * Special Flagged Register Validation Caller
1283 */
1284 extern ide_startstop_t flagged_taskfile(ide_drive_t *, ide_task_t *);
1285
1286 extern ide_startstop_t set_multmode_intr(ide_drive_t *);
1287 extern ide_startstop_t set_geometry_intr(ide_drive_t *);
1288 extern ide_startstop_t recal_intr(ide_drive_t *);
1289 extern ide_startstop_t task_no_data_intr(ide_drive_t *);
1290 extern ide_startstop_t task_in_intr(ide_drive_t *);
1291 extern ide_startstop_t pre_task_out_intr(ide_drive_t *, struct request *);
1292
1293 extern int ide_raw_taskfile(ide_drive_t *, ide_task_t *, u8 *);
1294
1295 int ide_taskfile_ioctl(ide_drive_t *, unsigned int, unsigned long);
1296 int ide_cmd_ioctl(ide_drive_t *, unsigned int, unsigned long);
1297 int ide_task_ioctl(ide_drive_t *, unsigned int, unsigned long);
1298
1299 extern int system_bus_clock(void);
1300
1301 extern int ide_driveid_update(ide_drive_t *);
1302 extern int ide_ata66_check(ide_drive_t *, ide_task_t *);
1303 extern int ide_config_drive_speed(ide_drive_t *, u8);
1304 extern u8 eighty_ninty_three (ide_drive_t *);
1305 extern int set_transfer(ide_drive_t *, ide_task_t *);
1306 extern int taskfile_lib_get_identify(ide_drive_t *drive, u8 *);
1307
1308 extern int ide_wait_not_busy(ide_hwif_t *hwif, unsigned long timeout);
1309
1310 /*
1311 * ide_stall_queue() can be used by a drive to give excess bandwidth back
1312 * to the hwgroup by sleeping for timeout jiffies.
1313 */
1314 extern void ide_stall_queue(ide_drive_t *drive, unsigned long timeout);
1315
1316 extern int ide_spin_wait_hwgroup(ide_drive_t *);
1317 extern void ide_timer_expiry(unsigned long);
1318 extern irqreturn_t ide_intr(int irq, void *dev_id, struct pt_regs *regs);
1319 extern void do_ide_request(request_queue_t *);
1320 extern void ide_init_subdrivers(void);
1321
1322 void ide_init_disk(struct gendisk *, ide_drive_t *);
1323
1324 extern int ideprobe_init(void);
1325
1326 extern void ide_scan_pcibus(int scan_direction) __init;
1327 extern int ide_pci_register_driver(struct pci_driver *driver);
1328 extern void ide_pci_unregister_driver(struct pci_driver *driver);
1329 void ide_pci_setup_ports(struct pci_dev *, struct ide_pci_device_s *, int, ata_index_t *);
1330 extern void ide_setup_pci_noise (struct pci_dev *dev, struct ide_pci_device_s *d);
1331
1332 extern void default_hwif_iops(ide_hwif_t *);
1333 extern void default_hwif_mmiops(ide_hwif_t *);
1334 extern void default_hwif_transport(ide_hwif_t *);
1335
1336 void ide_register_subdriver(ide_drive_t *, ide_driver_t *);
1337 void ide_unregister_subdriver(ide_drive_t *, ide_driver_t *);
1338
1339 #define ON_BOARD 1
1340 #define NEVER_BOARD 0
1341
1342 #ifdef CONFIG_BLK_DEV_OFFBOARD
1343 # define OFF_BOARD ON_BOARD
1344 #else /* CONFIG_BLK_DEV_OFFBOARD */
1345 # define OFF_BOARD NEVER_BOARD
1346 #endif /* CONFIG_BLK_DEV_OFFBOARD */
1347
1348 #define NODMA 0
1349 #define NOAUTODMA 1
1350 #define AUTODMA 2
1351
1352 typedef struct ide_pci_enablebit_s {
1353 u8 reg; /* byte pci reg holding the enable-bit */
1354 u8 mask; /* mask to isolate the enable-bit */
1355 u8 val; /* value of masked reg when "enabled" */
1356 } ide_pci_enablebit_t;
1357
1358 enum {
1359 /* Uses ISA control ports not PCI ones. */
1360 IDEPCI_FLAG_ISA_PORTS = (1 << 0),
1361 IDEPCI_FLAG_FORCE_PDC = (1 << 1),
1362 };
1363
1364 typedef struct ide_pci_device_s {
1365 char *name;
1366 int (*init_setup)(struct pci_dev *, struct ide_pci_device_s *);
1367 void (*init_setup_dma)(struct pci_dev *, struct ide_pci_device_s *, ide_hwif_t *);
1368 unsigned int (*init_chipset)(struct pci_dev *, const char *);
1369 void (*init_iops)(ide_hwif_t *);
1370 void (*init_hwif)(ide_hwif_t *);
1371 void (*init_dma)(ide_hwif_t *, unsigned long);
1372 void (*fixup)(ide_hwif_t *);
1373 u8 channels;
1374 u8 autodma;
1375 ide_pci_enablebit_t enablebits[2];
1376 u8 bootable;
1377 unsigned int extra;
1378 struct ide_pci_device_s *next;
1379 u8 flags;
1380 } ide_pci_device_t;
1381
1382 extern int ide_setup_pci_device(struct pci_dev *, ide_pci_device_t *);
1383 extern int ide_setup_pci_devices(struct pci_dev *, struct pci_dev *, ide_pci_device_t *);
1384
1385 void ide_map_sg(ide_drive_t *, struct request *);
1386 void ide_init_sg_cmd(ide_drive_t *, struct request *);
1387
1388 #define BAD_DMA_DRIVE 0
1389 #define GOOD_DMA_DRIVE 1
1390
1391 #ifdef CONFIG_BLK_DEV_IDEDMA
1392 int __ide_dma_bad_drive(ide_drive_t *);
1393 int __ide_dma_good_drive(ide_drive_t *);
1394 int ide_use_dma(ide_drive_t *);
1395 int __ide_dma_off(ide_drive_t *);
1396 void ide_dma_verbose(ide_drive_t *);
1397 ide_startstop_t ide_dma_intr(ide_drive_t *);
1398
1399 #ifdef CONFIG_BLK_DEV_IDEDMA_PCI
1400 extern int ide_build_sglist(ide_drive_t *, struct request *);
1401 extern int ide_build_dmatable(ide_drive_t *, struct request *);
1402 extern void ide_destroy_dmatable(ide_drive_t *);
1403 extern int ide_release_dma(ide_hwif_t *);
1404 extern void ide_setup_dma(ide_hwif_t *, unsigned long, unsigned int);
1405
1406 extern int __ide_dma_host_off(ide_drive_t *);
1407 extern int __ide_dma_off_quietly(ide_drive_t *);
1408 extern int __ide_dma_host_on(ide_drive_t *);
1409 extern int __ide_dma_on(ide_drive_t *);
1410 extern int __ide_dma_check(ide_drive_t *);
1411 extern int ide_dma_setup(ide_drive_t *);
1412 extern void ide_dma_start(ide_drive_t *);
1413 extern int __ide_dma_end(ide_drive_t *);
1414 extern int __ide_dma_lostirq(ide_drive_t *);
1415 extern int __ide_dma_timeout(ide_drive_t *);
1416 #endif /* CONFIG_BLK_DEV_IDEDMA_PCI */
1417
1418 #else
1419 static inline int ide_use_dma(ide_drive_t *drive) { return 0; }
1420 static inline int __ide_dma_off(ide_drive_t *drive) { return 0; }
1421 static inline void ide_dma_verbose(ide_drive_t *drive) { ; }
1422 #endif /* CONFIG_BLK_DEV_IDEDMA */
1423
1424 #ifndef CONFIG_BLK_DEV_IDEDMA_PCI
1425 static inline void ide_release_dma(ide_hwif_t *drive) {;}
1426 #endif
1427
1428 extern int ide_hwif_request_regions(ide_hwif_t *hwif);
1429 extern void ide_hwif_release_regions(ide_hwif_t* hwif);
1430 extern void ide_unregister (unsigned int index);
1431
1432 void ide_register_region(struct gendisk *);
1433 void ide_unregister_region(struct gendisk *);
1434
1435 void ide_undecoded_slave(ide_hwif_t *);
1436
1437 int probe_hwif_init_with_fixup(ide_hwif_t *, void (*)(ide_hwif_t *));
1438 extern int probe_hwif_init(ide_hwif_t *);
1439
1440 static inline void *ide_get_hwifdata (ide_hwif_t * hwif)
1441 {
1442 return hwif->hwif_data;
1443 }
1444
1445 static inline void ide_set_hwifdata (ide_hwif_t * hwif, void *data)
1446 {
1447 hwif->hwif_data = data;
1448 }
1449
1450 /* ide-lib.c */
1451 extern u8 ide_dma_speed(ide_drive_t *drive, u8 mode);
1452 extern u8 ide_rate_filter(u8 mode, u8 speed);
1453 extern int ide_dma_enable(ide_drive_t *drive);
1454 extern char *ide_xfer_verbose(u8 xfer_rate);
1455 extern void ide_toggle_bounce(ide_drive_t *drive, int on);
1456 extern int ide_set_xfer_rate(ide_drive_t *drive, u8 rate);
1457
1458 u8 ide_dump_status(ide_drive_t *, const char *, u8);
1459
1460 typedef struct ide_pio_timings_s {
1461 int setup_time; /* Address setup (ns) minimum */
1462 int active_time; /* Active pulse (ns) minimum */
1463 int cycle_time; /* Cycle time (ns) minimum = (setup + active + recovery) */
1464 } ide_pio_timings_t;
1465
1466 typedef struct ide_pio_data_s {
1467 u8 pio_mode;
1468 u8 use_iordy;
1469 u8 overridden;
1470 u8 blacklisted;
1471 unsigned int cycle_time;
1472 } ide_pio_data_t;
1473
1474 extern u8 ide_get_best_pio_mode (ide_drive_t *drive, u8 mode_wanted, u8 max_mode, ide_pio_data_t *d);
1475 extern const ide_pio_timings_t ide_pio_timings[6];
1476
1477
1478 extern spinlock_t ide_lock;
1479 extern struct semaphore ide_cfg_sem;
1480 /*
1481 * Structure locking:
1482 *
1483 * ide_cfg_sem and ide_lock together protect changes to
1484 * ide_hwif_t->{next,hwgroup}
1485 * ide_drive_t->next
1486 *
1487 * ide_hwgroup_t->busy: ide_lock
1488 * ide_hwgroup_t->hwif: ide_lock
1489 * ide_hwif_t->mate: constant, no locking
1490 * ide_drive_t->hwif: constant, no locking
1491 */
1492
1493 #define local_irq_set(flags) do { local_save_flags((flags)); local_irq_enable(); } while (0)
1494
1495 extern struct bus_type ide_bus_type;
1496
1497 /* check if CACHE FLUSH (EXT) command is supported (bits defined in ATA-6) */
1498 #define ide_id_has_flush_cache(id) ((id)->cfs_enable_2 & 0x3000)
1499
1500 /* some Maxtor disks have bit 13 defined incorrectly so check bit 10 too */
1501 #define ide_id_has_flush_cache_ext(id) \
1502 (((id)->cfs_enable_2 & 0x2400) == 0x2400)
1503
1504 static inline int hwif_to_node(ide_hwif_t *hwif)
1505 {
1506 struct pci_dev *dev = hwif->pci_dev;
1507 return dev ? pcibus_to_node(dev->bus) : -1;
1508 }
1509
1510 #endif /* _IDE_H */
x86 "subsystem" repository