![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to ide.h CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [GnuMach] / Gnu-Mach / linux / src / drivers / block|
Return to ide.h CVS log | Up to [GnuMach] / Gnu-Mach / linux / src / drivers / block |
1.1 root 1: /*
2: * linux/drivers/block/ide.h
3: *
4: * Copyright (C) 1994, 1995 Linus Torvalds & authors
5: */
6:
7: #include <linux/config.h>
8:
9: /*
10: * This is the multiple IDE interface driver, as evolved from hd.c.
11: * It supports up to four IDE interfaces, on one or more IRQs (usually 14 & 15).
12: * There can be up to two drives per interface, as per the ATA-2 spec.
13: *
14: * Primary i/f: ide0: major=3; (hda) minor=0; (hdb) minor=64
15: * Secondary i/f: ide1: major=22; (hdc or hd1a) minor=0; (hdd or hd1b) minor=64
16: * Tertiary i/f: ide2: major=33; (hde) minor=0; (hdf) minor=64
17: * Quaternary i/f: ide3: major=34; (hdg) minor=0; (hdh) minor=64
18: */
19:
20: /******************************************************************************
21: * IDE driver configuration options (play with these as desired):
22: *
23: * REALLY_SLOW_IO can be defined in ide.c and ide-cd.c, if necessary
24: */
25: #undef REALLY_FAST_IO /* define if ide ports are perfect */
1.1.1.2 ! root 26: #define INITIAL_MULT_COUNT 16 /* off=0; on=2,4,8,16,32, etc.. */
1.1 root 27:
28: #ifndef SUPPORT_SLOW_DATA_PORTS /* 1 to support slow data ports */
29: #define SUPPORT_SLOW_DATA_PORTS 1 /* 0 to reduce kernel size */
30: #endif
31: #ifndef SUPPORT_VLB_SYNC /* 1 to support weird 32-bit chips */
32: #define SUPPORT_VLB_SYNC 1 /* 0 to reduce kernel size */
33: #endif
34: #ifndef DISK_RECOVERY_TIME /* off=0; on=access_delay_time */
35: #define DISK_RECOVERY_TIME 0 /* for hardware that needs it */
36: #endif
37: #ifndef OK_TO_RESET_CONTROLLER /* 1 needed for good error recovery */
38: #define OK_TO_RESET_CONTROLLER 1 /* 0 for use with AH2372A/B interface */
39: #endif
40: #ifndef FAKE_FDISK_FOR_EZDRIVE /* 1 to help linux fdisk with EZDRIVE */
41: #define FAKE_FDISK_FOR_EZDRIVE 1 /* 0 to reduce kernel size */
42: #endif
43: #ifndef FANCY_STATUS_DUMPS /* 1 for human-readable drive errors */
44: #define FANCY_STATUS_DUMPS 1 /* 0 to reduce kernel size */
45: #endif
46:
47: #ifdef CONFIG_BLK_DEV_CMD640
48: #if 0 /* change to 1 when debugging cmd640 problems */
49: void cmd640_dump_regs (void);
50: #define CMD640_DUMP_REGS cmd640_dump_regs() /* for debugging cmd640 chipset */
51: #endif
52: #endif /* CONFIG_BLK_DEV_CMD640 */
53:
54: #if defined(CONFIG_BLK_DEV_IDECD) || defined(CONFIG_BLK_DEV_IDETAPE) || \
55: defined(CONFIG_BLK_DEV_IDEFLOPPY) || defined(CONFIG_BLK_DEV_IDESCSI)
56: #define CONFIG_BLK_DEV_IDEATAPI 1
57: #endif
58:
59: /*
60: * IDE_DRIVE_CMD is used to implement many features of the hdparm utility
61: */
62: #define IDE_DRIVE_CMD 99 /* (magic) undef to reduce kernel size*/
63:
64: /*
65: * "No user-serviceable parts" beyond this point :)
66: *****************************************************************************/
67:
68: #if defined(CONFIG_BLK_DEV_IDESCSI) && !defined(CONFIG_SCSI)
69: #error "SCSI must also be selected"
70: #endif
71:
72: typedef unsigned char byte; /* used everywhere */
73:
74: /*
75: * Probably not wise to fiddle with these
76: */
77: #define ERROR_MAX 8 /* Max read/write errors per sector */
78: #define ERROR_RESET 3 /* Reset controller every 4th retry */
79: #define ERROR_RECAL 1 /* Recalibrate every 2nd retry */
80:
81: /*
82: * Ensure that various configuration flags have compatible settings
83: */
84: #ifdef REALLY_SLOW_IO
85: #undef REALLY_FAST_IO
86: #endif
87:
88: /*
89: * Definitions for accessing IDE controller registers
90: */
91:
92: #define HWIF(drive) ((ide_hwif_t *)((drive)->hwif))
93: #define HWGROUP(drive) ((ide_hwgroup_t *)(HWIF(drive)->hwgroup))
94:
95: #define IDE_DATA_OFFSET (0)
96: #define IDE_ERROR_OFFSET (1)
97: #define IDE_NSECTOR_OFFSET (2)
98: #define IDE_SECTOR_OFFSET (3)
99: #define IDE_LCYL_OFFSET (4)
100: #define IDE_HCYL_OFFSET (5)
101: #define IDE_SELECT_OFFSET (6)
102: #define IDE_STATUS_OFFSET (7)
103: #define IDE_FEATURE_OFFSET IDE_ERROR_OFFSET
104: #define IDE_COMMAND_OFFSET IDE_STATUS_OFFSET
105:
106: #define IDE_DATA_REG (HWIF(drive)->io_base+IDE_DATA_OFFSET)
107: #define IDE_ERROR_REG (HWIF(drive)->io_base+IDE_ERROR_OFFSET)
108: #define IDE_NSECTOR_REG (HWIF(drive)->io_base+IDE_NSECTOR_OFFSET)
109: #define IDE_SECTOR_REG (HWIF(drive)->io_base+IDE_SECTOR_OFFSET)
110: #define IDE_LCYL_REG (HWIF(drive)->io_base+IDE_LCYL_OFFSET)
111: #define IDE_HCYL_REG (HWIF(drive)->io_base+IDE_HCYL_OFFSET)
112: #define IDE_SELECT_REG (HWIF(drive)->io_base+IDE_SELECT_OFFSET)
113: #define IDE_STATUS_REG (HWIF(drive)->io_base+IDE_STATUS_OFFSET)
114: #define IDE_CONTROL_REG (HWIF(drive)->ctl_port)
115: #define IDE_FEATURE_REG IDE_ERROR_REG
116: #define IDE_COMMAND_REG IDE_STATUS_REG
117: #define IDE_ALTSTATUS_REG IDE_CONTROL_REG
118: #define IDE_IREASON_REG IDE_NSECTOR_REG
119: #define IDE_BCOUNTL_REG IDE_LCYL_REG
120: #define IDE_BCOUNTH_REG IDE_HCYL_REG
121:
122: #ifdef REALLY_FAST_IO
123: #define OUT_BYTE(b,p) outb((b),(p))
124: #define IN_BYTE(p) (byte)inb(p)
125: #else
126: #define OUT_BYTE(b,p) outb_p((b),(p))
127: #define IN_BYTE(p) (byte)inb_p(p)
128: #endif /* REALLY_FAST_IO */
129:
130: #define GET_ERR() IN_BYTE(IDE_ERROR_REG)
131: #define GET_STAT() IN_BYTE(IDE_STATUS_REG)
132: #define OK_STAT(stat,good,bad) (((stat)&((good)|(bad)))==(good))
133: #define BAD_R_STAT (BUSY_STAT | ERR_STAT)
134: #define BAD_W_STAT (BAD_R_STAT | WRERR_STAT)
135: #define BAD_STAT (BAD_R_STAT | DRQ_STAT)
136: #define DRIVE_READY (READY_STAT | SEEK_STAT)
137: #define DATA_READY (DRQ_STAT)
138:
139: /*
140: * Some more useful definitions
141: */
142: #define IDE_MAJOR_NAME "ide" /* the same for all i/f; see also genhd.c */
143: #define MAJOR_NAME IDE_MAJOR_NAME
144: #define PARTN_BITS 6 /* number of minor dev bits for partitions */
145: #define PARTN_MASK ((1<<PARTN_BITS)-1) /* a useful bit mask */
146: #define MAX_DRIVES 2 /* per interface; 2 assumed by lots of code */
147: #ifndef MAX_HWIFS
148: #define MAX_HWIFS 4 /* an arbitrary, but realistic limit */
149: #endif
150: #define SECTOR_WORDS (512 / 4) /* number of 32bit words per sector */
151:
152: /*
153: * Timeouts for various operations:
154: */
1.1.1.2 ! root 155: #define WAIT_DRQ (1*HZ) /* 1s - spec allows up to 20ms, but CF
! 156: * cards and SSD drives need more */
1.1 root 157: #ifdef CONFIG_APM
158: #define WAIT_READY (5*HZ) /* 5sec - some laptops are very slow */
159: #else
160: #define WAIT_READY (3*HZ/100) /* 30msec - should be instantaneous */
161: #endif /* CONFIG_APM */
162: #define WAIT_PIDENTIFY (1*HZ) /* 1sec - should be less than 3ms (?) */
163: #define WAIT_WORSTCASE (30*HZ) /* 30sec - worst case when spinning up */
164: #define WAIT_CMD (10*HZ) /* 10sec - maximum wait for an IRQ to happen */
165:
166: #if defined(CONFIG_BLK_DEV_HT6560B) || defined(CONFIG_BLK_DEV_PROMISE)
167: #define SELECT_DRIVE(hwif,drive) \
168: { \
169: if (hwif->selectproc) \
170: hwif->selectproc(drive); \
171: else \
172: OUT_BYTE((drive)->select.all, hwif->io_base+IDE_SELECT_OFFSET); \
173: }
174: #else
175: #define SELECT_DRIVE(hwif,drive) OUT_BYTE((drive)->select.all, hwif->io_base+IDE_SELECT_OFFSET);
176: #endif /* CONFIG_BLK_DEV_HT6560B || CONFIG_BLK_DEV_PROMISE */
177:
178: #ifdef CONFIG_BLK_DEV_IDETAPE
179: #include "ide-tape.h"
180: #endif /* CONFIG_BLK_DEV_IDETAPE */
181:
182: #ifdef CONFIG_BLK_DEV_IDECD
183:
184: struct atapi_request_sense {
185: unsigned char error_code : 7;
186: unsigned char valid : 1;
187: byte reserved1;
188: unsigned char sense_key : 4;
189: unsigned char reserved2 : 1;
190: unsigned char ili : 1;
191: unsigned char reserved3 : 2;
192: byte info[4];
193: byte sense_len;
194: byte command_info[4];
195: byte asc;
196: byte ascq;
197: byte fru;
198: byte sense_key_specific[3];
199: };
200:
201: struct packet_command {
1.1.1.2 ! root 202: unsigned char *buffer;
1.1 root 203: int buflen;
204: int stat;
205: struct atapi_request_sense *sense_data;
206: unsigned char c[12];
207: };
208:
209:
210: /* Structure of a MSF cdrom address. */
211: struct atapi_msf {
212: byte reserved;
213: byte minute;
214: byte second;
215: byte frame;
216: };
217:
218:
219: /* Space to hold the disk TOC. */
220:
221: #define MAX_TRACKS 99
222: struct atapi_toc_header {
223: unsigned short toc_length;
224: byte first_track;
225: byte last_track;
226: };
227:
228: struct atapi_toc_entry {
229: byte reserved1;
230: unsigned control : 4;
231: unsigned adr : 4;
232: byte track;
233: byte reserved2;
234: union {
235: unsigned lba;
236: struct atapi_msf msf;
237: } addr;
238: };
239:
240: struct atapi_toc {
241: int last_session_lba;
242: int xa_flag;
243: unsigned capacity;
244: struct atapi_toc_header hdr;
245: struct atapi_toc_entry ent[MAX_TRACKS+1];
246: /* One extra for the leadout. */
247: };
248:
249:
250: /* This structure is annoyingly close to, but not identical with,
251: the cdrom_subchnl structure from cdrom.h. */
252: struct atapi_cdrom_subchnl
253: {
254: u_char acdsc_reserved;
255: u_char acdsc_audiostatus;
256: u_short acdsc_length;
257: u_char acdsc_format;
258:
259: u_char acdsc_adr: 4;
260: u_char acdsc_ctrl: 4;
261: u_char acdsc_trk;
262: u_char acdsc_ind;
263: union {
264: struct atapi_msf msf;
265: int lba;
266: } acdsc_absaddr;
267: union {
268: struct atapi_msf msf;
269: int lba;
270: } acdsc_reladdr;
271: };
272:
273:
274: /* Extra per-device info for cdrom drives. */
275: struct cdrom_info {
276:
277: /* Buffer for table of contents. NULL if we haven't allocated
278: a TOC buffer for this device yet. */
279:
280: struct atapi_toc *toc;
281:
282: /* Sector buffer. If a read request wants only the first part
283: of a cdrom block, we cache the rest of the block here,
284: in the expectation that that data is going to be wanted soon.
285: SECTOR_BUFFERED is the number of the first buffered sector,
286: and NSECTORS_BUFFERED is the number of sectors in the buffer.
287: Before the buffer is allocated, we should have
288: SECTOR_BUFFER == NULL and NSECTORS_BUFFERED == 0. */
289:
290: unsigned long sector_buffered;
291: unsigned long nsectors_buffered;
292: char *sector_buffer;
293:
294: /* The result of the last successful request sense command
295: on this device. */
296: struct atapi_request_sense sense_data;
297:
298: int max_sectors;
299: };
300:
301: #endif /* CONFIG_BLK_DEV_IDECD */
302:
303: /*
304: * Now for the data we need to maintain per-drive: ide_drive_t
305: */
306:
307: typedef enum {ide_disk, ide_cdrom, ide_tape, ide_floppy, ide_scsi} ide_media_t;
308:
309: typedef union {
310: unsigned all : 8; /* all of the bits together */
311: struct {
312: unsigned set_geometry : 1; /* respecify drive geometry */
313: unsigned recalibrate : 1; /* seek to cyl 0 */
314: unsigned set_multmode : 1; /* set multmode count */
315: unsigned set_tune : 1; /* tune interface for drive */
316: unsigned mc : 1; /* acknowledge media change */
317: unsigned reserved : 3; /* unused */
318: } b;
319: } special_t;
320:
321: typedef union {
322: unsigned all : 8; /* all of the bits together */
323: struct {
324: unsigned head : 4; /* always zeros here */
325: unsigned unit : 1; /* drive select number, 0 or 1 */
326: unsigned bit5 : 1; /* always 1 */
327: unsigned lba : 1; /* using LBA instead of CHS */
328: unsigned bit7 : 1; /* always 1 */
329: } b;
330: } select_t;
331:
332: typedef struct ide_drive_s {
333: special_t special; /* special action flags */
334: unsigned present : 1; /* drive is physically present */
335: unsigned noprobe : 1; /* from: hdx=noprobe */
336: unsigned keep_settings : 1; /* restore settings after drive reset */
337: unsigned busy : 1; /* currently doing revalidate_disk() */
338: unsigned removable : 1; /* 1 if need to do check_media_change */
339: unsigned using_dma : 1; /* disk is using dma for read/write */
340: unsigned forced_geom : 1; /* 1 if hdx=c,h,s was given at boot */
341: unsigned unmask : 1; /* flag: okay to unmask other irqs */
342: unsigned no_unmask : 1; /* disallow setting unmask bit */
343: unsigned no_io_32bit : 1; /* disallow enabling 32bit I/O */
344: unsigned nobios : 1; /* flag: do not probe bios for drive */
345: unsigned slow : 1; /* flag: slow data port */
346: unsigned autotune : 2; /* 1=autotune, 2=noautotune, 0=default */
347: #if FAKE_FDISK_FOR_EZDRIVE
348: unsigned remap_0_to_1 : 1; /* flag: partitioned with ezdrive */
349: #endif /* FAKE_FDISK_FOR_EZDRIVE */
350: unsigned no_geom : 1; /* flag: do not set geometry */
351: ide_media_t media; /* disk, cdrom, tape, floppy */
352: select_t select; /* basic drive/head select reg value */
353: byte ctl; /* "normal" value for IDE_CONTROL_REG */
354: byte ready_stat; /* min status value for drive ready */
355: byte mult_count; /* current multiple sector setting */
356: byte mult_req; /* requested multiple sector setting */
357: byte tune_req; /* requested drive tuning setting */
358: byte io_32bit; /* 0=16-bit, 1=32-bit, 2/3=32bit+sync */
359: byte bad_wstat; /* used for ignoring WRERR_STAT */
360: byte sect0; /* offset of first sector for DM6:DDO */
361: byte usage; /* current "open()" count for drive */
362: byte head; /* "real" number of heads */
363: byte sect; /* "real" sectors per track */
364: byte bios_head; /* BIOS/fdisk/LILO number of heads */
365: byte bios_sect; /* BIOS/fdisk/LILO sectors per track */
366: unsigned short bios_cyl; /* BIOS/fdisk/LILO number of cyls */
367: unsigned short cyl; /* "real" number of cyls */
368: void *hwif; /* actually (ide_hwif_t *) */
369: struct wait_queue *wqueue; /* used to wait for drive in open() */
370: struct hd_driveid *id; /* drive model identification info */
371: struct hd_struct *part; /* drive partition table */
372: char name[4]; /* drive name, such as "hda" */
373: #ifdef CONFIG_BLK_DEV_IDECD
374: struct cdrom_info cdrom_info; /* for ide-cd.c */
375: #endif /* CONFIG_BLK_DEV_IDECD */
376: #ifdef CONFIG_BLK_DEV_IDETAPE
377: idetape_tape_t tape; /* for ide-tape.c */
378: #endif /* CONFIG_BLK_DEV_IDETAPE */
379: #ifdef CONFIG_BLK_DEV_IDEFLOPPY
380: void *floppy; /* for ide-floppy.c */
381: #endif /* CONFIG_BLK_DEV_IDEFLOPPY */
382: #ifdef CONFIG_BLK_DEV_IDESCSI
383: void *scsi; /* for ide-scsi.c */
384: #endif /* CONFIG_BLK_DEV_IDESCSI */
385: byte ide_scsi; /* use ide-scsi driver */
386: } ide_drive_t;
387:
388: /*
389: * An ide_dmaproc_t() initiates/aborts DMA read/write operations on a drive.
390: *
391: * The caller is assumed to have selected the drive and programmed the drive's
392: * sector address using CHS or LBA. All that remains is to prepare for DMA
393: * and then issue the actual read/write DMA/PIO command to the drive.
394: *
395: * Returns 0 if all went well.
396: * Returns 1 if DMA read/write could not be started, in which case the caller
397: * should either try again later, or revert to PIO for the current request.
398: */
399: typedef enum { ide_dma_read = 0, ide_dma_write = 1,
400: ide_dma_abort = 2, ide_dma_check = 3,
401: ide_dma_status_bad = 4, ide_dma_transferred = 5,
402: ide_dma_begin = 6 }
403: ide_dma_action_t;
404:
405: typedef int (ide_dmaproc_t)(ide_dma_action_t, ide_drive_t *);
406:
407:
408: /*
409: * An ide_tuneproc_t() is used to set the speed of an IDE interface
410: * to a particular PIO mode. The "byte" parameter is used
411: * to select the PIO mode by number (0,1,2,3,4,5), and a value of 255
412: * indicates that the interface driver should "auto-tune" the PIO mode
413: * according to the drive capabilities in drive->id;
414: *
415: * Not all interface types support tuning, and not all of those
416: * support all possible PIO settings. They may silently ignore
417: * or round values as they see fit.
418: */
419: typedef void (ide_tuneproc_t)(ide_drive_t *, byte);
420:
421: /*
422: * This is used to provide HT6560B & PROMISE interface support.
423: */
424: typedef void (ide_selectproc_t) (ide_drive_t *);
425:
426: /*
427: * hwif_chipset_t is used to keep track of the specific hardware
428: * chipset used by each IDE interface, if known.
429: */
430: typedef enum { ide_unknown, ide_generic, ide_triton,
431: ide_cmd640, ide_dtc2278, ide_ali14xx,
432: ide_qd6580, ide_umc8672, ide_ht6560b,
1.1.1.2 ! root 433: ide_promise, ide_hpt343, ide_udma,
! 434: ide_ultra66 }
1.1 root 435: hwif_chipset_t;
436:
437: typedef struct hwif_s {
438: struct hwif_s *next; /* for linked-list in ide_hwgroup_t */
439: void *hwgroup; /* actually (ide_hwgroup_t *) */
440: unsigned short io_base; /* base io port addr */
441: unsigned short ctl_port; /* usually io_base+0x206 */
442: ide_drive_t drives[MAX_DRIVES]; /* drive info */
443: struct gendisk *gd; /* gendisk structure */
444: ide_tuneproc_t *tuneproc; /* routine to tune PIO mode for drives */
445: #if defined(CONFIG_BLK_DEV_HT6560B) || defined(CONFIG_BLK_DEV_PROMISE)
446: ide_selectproc_t *selectproc; /* tweaks hardware to select drive */
447: #endif
448: ide_dmaproc_t *dmaproc; /* dma read/write/abort routine */
449: unsigned long *dmatable; /* dma physical region descriptor table */
450: unsigned short dma_base; /* base addr for dma ports (triton) */
451: byte irq; /* our irq number */
452: byte major; /* our major number */
453: char name[5]; /* name of interface, eg. "ide0" */
454: byte index; /* 0 for ide0; 1 for ide1; ... */
455: hwif_chipset_t chipset; /* sub-module for tuning.. */
456: unsigned noprobe : 1; /* don't probe for this interface */
457: unsigned present : 1; /* this interface exists */
458: unsigned serialized : 1; /* serialized operation with mate hwif */
459: unsigned sharing_irq: 1; /* 1 = sharing irq with another hwif */
460: #ifdef CONFIG_BLK_DEV_PROMISE
461: unsigned is_promise2: 1; /* 2nd i/f on promise DC4030 */
462: #endif /* CONFIG_BLK_DEV_PROMISE */
463: #if (DISK_RECOVERY_TIME > 0)
464: unsigned long last_time; /* time when previous rq was done */
465: #endif
466: #ifdef CONFIG_BLK_DEV_IDECD
467: struct request request_sense_request; /* from ide-cd.c */
468: struct packet_command request_sense_pc; /* from ide-cd.c */
469: #endif /* CONFIG_BLK_DEV_IDECD */
470: #ifdef CONFIG_BLK_DEV_IDETAPE
471: ide_drive_t *tape_drive; /* Pointer to the tape on this interface */
472: #endif /* CONFIG_BLK_DEV_IDETAPE */
473: } ide_hwif_t;
474:
475: /*
476: * internal ide interrupt handler type
477: */
478: typedef void (ide_handler_t)(ide_drive_t *);
479:
480: typedef struct hwgroup_s {
481: ide_handler_t *handler;/* irq handler, if active */
482: ide_drive_t *drive; /* current drive */
483: ide_hwif_t *hwif; /* ptr to current hwif in linked-list */
484: ide_hwif_t *next_hwif; /* next selected hwif (for tape) */
485: struct request *rq; /* current request */
486: struct timer_list timer; /* failsafe timer */
487: struct request wrq; /* local copy of current write rq */
488: unsigned long poll_timeout; /* timeout value during long polls */
489: int active; /* set when servicing requests */
490: } ide_hwgroup_t;
491:
492: /*
493: * ide_hwifs[] is the master data structure used to keep track
494: * of just about everything in ide.c. Whenever possible, routines
495: * should be using pointers to a drive (ide_drive_t *) or
496: * pointers to a hwif (ide_hwif_t *), rather than indexing this
497: * structure directly (the allocation/layout may change!).
498: *
499: */
500: #ifndef _IDE_C
501: extern ide_hwif_t ide_hwifs[]; /* master data repository */
502: #endif
503:
504: /*
505: * One final include file, which references some of the data/defns from above
506: */
507: #define IDE_DRIVER /* "parameter" for blk.h */
508: #include <linux/blk.h>
509:
510: #if (DISK_RECOVERY_TIME > 0)
511: void ide_set_recovery_timer (ide_hwif_t *);
512: #define SET_RECOVERY_TIMER(drive) ide_set_recovery_timer (drive)
513: #else
514: #define SET_RECOVERY_TIMER(drive)
515: #endif
516:
517: /*
518: * This is used for (nearly) all data transfers from the IDE interface
519: */
520: void ide_input_data (ide_drive_t *drive, void *buffer, unsigned int wcount);
521:
522: /*
523: * This is used for (nearly) all data transfers to the IDE interface
524: */
525: void ide_output_data (ide_drive_t *drive, void *buffer, unsigned int wcount);
526:
527: /*
528: * This is used for (nearly) all ATAPI data transfers from/to the IDE interface
529: */
530: void atapi_input_bytes (ide_drive_t *drive, void *buffer, unsigned int bytecount);
531: void atapi_output_bytes (ide_drive_t *drive, void *buffer, unsigned int bytecount);
532:
533: /*
534: * This is used on exit from the driver, to designate the next irq handler
535: * and also to start the safety timer.
536: */
537: void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler, unsigned int timeout);
538:
539: /*
540: * Error reporting, in human readable form (luxurious, but a memory hog).
541: */
542: byte ide_dump_status (ide_drive_t *drive, const char *msg, byte stat);
543:
544: /*
545: * ide_error() takes action based on the error returned by the controller.
546: * The calling function must return afterwards, to restart the request.
547: */
548: void ide_error (ide_drive_t *drive, const char *msg, byte stat);
549:
550: /*
551: * ide_fixstring() cleans up and (optionally) byte-swaps a text string,
552: * removing leading/trailing blanks and compressing internal blanks.
553: * It is primarily used to tidy up the model name/number fields as
554: * returned by the WIN_[P]IDENTIFY commands.
555: */
556: void ide_fixstring (byte *s, const int bytecount, const int byteswap);
557:
558: /*
559: * This routine busy-waits for the drive status to be not "busy".
560: * It then checks the status for all of the "good" bits and none
561: * of the "bad" bits, and if all is okay it returns 0. All other
562: * cases return 1 after invoking ide_error() -- caller should return.
563: *
564: */
565: int ide_wait_stat (ide_drive_t *drive, byte good, byte bad, unsigned long timeout);
566:
567: /*
568: * This routine is called from the partition-table code in genhd.c
569: * to "convert" a drive to a logical geometry with fewer than 1024 cyls.
570: *
571: * The second parameter, "xparm", determines exactly how the translation
572: * will be handled:
573: * 0 = convert to CHS with fewer than 1024 cyls
574: * using the same method as Ontrack DiskManager.
575: * 1 = same as "0", plus offset everything by 63 sectors.
576: * -1 = similar to "0", plus redirect sector 0 to sector 1.
577: * >1 = convert to a CHS geometry with "xparm" heads.
578: *
579: * Returns 0 if the translation was not possible, if the device was not
580: * an IDE disk drive, or if a geometry was "forced" on the commandline.
581: * Returns 1 if the geometry translation was successful.
582: */
583: int ide_xlate_1024 (kdev_t, int, const char *);
584:
585: /*
586: * Start a reset operation for an IDE interface.
587: * The caller should return immediately after invoking this.
588: */
589: void ide_do_reset (ide_drive_t *);
590:
591: /*
592: * This function is intended to be used prior to invoking ide_do_drive_cmd().
593: */
594: void ide_init_drive_cmd (struct request *rq);
595:
596: /*
597: * "action" parameter type for ide_do_drive_cmd() below.
598: */
599: typedef enum
600: {ide_wait, /* insert rq at end of list, and wait for it */
601: ide_next, /* insert rq immediately after current request */
602: ide_preempt, /* insert rq in front of current request */
603: ide_end} /* insert rq at end of list, but don't wait for it */
604: ide_action_t;
605:
606: /*
607: * This function issues a special IDE device request
608: * onto the request queue.
609: *
610: * If action is ide_wait, then the rq is queued at the end of the
611: * request queue, and the function sleeps until it has been processed.
612: * This is for use when invoked from an ioctl handler.
613: *
614: * If action is ide_preempt, then the rq is queued at the head of
615: * the request queue, displacing the currently-being-processed
616: * request and this function returns immediately without waiting
617: * for the new rq to be completed. This is VERY DANGEROUS, and is
618: * intended for careful use by the ATAPI tape/cdrom driver code.
619: *
620: * If action is ide_next, then the rq is queued immediately after
621: * the currently-being-processed-request (if any), and the function
622: * returns without waiting for the new rq to be completed. As above,
623: * This is VERY DANGEROUS, and is intended for careful use by the
624: * ATAPI tape/cdrom driver code.
625: *
626: * If action is ide_end, then the rq is queued at the end of the
627: * request queue, and the function returns immediately without waiting
628: * for the new rq to be completed. This is again intended for careful
629: * use by the ATAPI tape/cdrom driver code. (Currently used by ide-tape.c,
630: * when operating in the pipelined operation mode).
631: */
632: int ide_do_drive_cmd (ide_drive_t *drive, struct request *rq, ide_action_t action);
633:
634: /*
635: * Clean up after success/failure of an explicit drive cmd.
636: * stat/err are used only when (HWGROUP(drive)->rq->cmd == IDE_DRIVE_CMD).
637: */
638: void ide_end_drive_cmd (ide_drive_t *drive, byte stat, byte err);
639:
640: /*
641: * ide_system_bus_speed() returns what we think is the system VESA/PCI
642: * bus speed (in Mhz). This is used for calculating interface PIO timings.
643: * The default is 40 for known PCI systems, 50 otherwise.
644: * The "idebus=xx" parameter can be used to override this value.
645: */
646: int ide_system_bus_speed (void);
647:
648: /*
649: * ide_multwrite() transfers a block of up to mcount sectors of data
650: * to a drive as part of a disk multwrite operation.
651: */
652: void ide_multwrite (ide_drive_t *drive, unsigned int mcount);
653:
654: #ifdef CONFIG_BLK_DEV_IDECD
655: /*
656: * These are routines in ide-cd.c invoked from ide.c
657: */
658: void ide_do_rw_cdrom (ide_drive_t *, unsigned long);
659: int ide_cdrom_ioctl (ide_drive_t *, struct inode *, struct file *, unsigned int, unsigned long);
660: int ide_cdrom_check_media_change (ide_drive_t *);
661: int ide_cdrom_open (struct inode *, struct file *, ide_drive_t *);
662: void ide_cdrom_release (struct inode *, struct file *, ide_drive_t *);
663: void ide_cdrom_setup (ide_drive_t *);
664: #endif /* CONFIG_BLK_DEV_IDECD */
665:
666: #ifdef CONFIG_BLK_DEV_IDETAPE
667:
668: /*
669: * Functions in ide-tape.c which are invoked from ide.c:
670: */
671:
672: /*
673: * idetape_identify_device is called during device probing stage to
674: * probe for an ide atapi tape drive and to initialize global variables
675: * in ide-tape.c which provide the link between the character device
676: * and the corresponding block device.
677: *
678: * Returns 1 if an ide tape was detected and is supported.
679: * Returns 0 otherwise.
680: */
681:
682: int idetape_identify_device (ide_drive_t *drive,struct hd_driveid *id);
683:
684: /*
685: * idetape_setup is called a bit later than idetape_identify_device,
686: * during the search for disk partitions, to initialize various tape
687: * state variables in ide_drive_t *drive.
688: */
689:
690: void idetape_setup (ide_drive_t *drive);
691:
692: /*
693: * idetape_do_request is our request function. It is called by ide.c
694: * to process a new request.
695: */
696:
697: void idetape_do_request (ide_drive_t *drive, struct request *rq, unsigned long block);
698:
699: /*
700: * idetape_end_request is used to finish servicing a request, and to
701: * insert a pending pipeline request into the main device queue.
702: */
703:
704: void idetape_end_request (byte uptodate, ide_hwgroup_t *hwgroup);
705:
706: /*
707: * Block device interface functions.
708: */
709:
710: int idetape_blkdev_ioctl (ide_drive_t *drive, struct inode *inode, struct file *file,
711: unsigned int cmd, unsigned long arg);
712: int idetape_blkdev_open (struct inode *inode, struct file *filp, ide_drive_t *drive);
713: void idetape_blkdev_release (struct inode *inode, struct file *filp, ide_drive_t *drive);
714:
715: /*
716: * idetape_register_chrdev initializes the character device interface to
717: * the ide tape drive.
718: */
719:
720: void idetape_register_chrdev (void);
721:
722: #endif /* CONFIG_BLK_DEV_IDETAPE */
723:
724: #ifdef CONFIG_BLK_DEV_IDEFLOPPY
725: int idefloppy_identify_device (ide_drive_t *drive,struct hd_driveid *id);
726: void idefloppy_setup (ide_drive_t *drive);
727: void idefloppy_do_request (ide_drive_t *drive, struct request *rq, unsigned long block);
728: void idefloppy_end_request (byte uptodate, ide_hwgroup_t *hwgroup);
729: int idefloppy_ioctl (ide_drive_t *drive, struct inode *inode, struct file *file,
730: unsigned int cmd, unsigned long arg);
731: int idefloppy_open (struct inode *inode, struct file *filp, ide_drive_t *drive);
732: void idefloppy_release (struct inode *inode, struct file *filp, ide_drive_t *drive);
733: int idefloppy_media_change (ide_drive_t *drive);
734: unsigned long idefloppy_capacity (ide_drive_t *drive);
735: #endif /* CONFIG_BLK_DEV_IDEFLOPPY */
736:
737: #ifdef CONFIG_BLK_DEV_IDESCSI
738: void idescsi_setup (ide_drive_t *drive);
739: void idescsi_do_request (ide_drive_t *drive, struct request *rq, unsigned long block);
740: void idescsi_end_request (byte uptodate, ide_hwgroup_t *hwgroup);
741: int idescsi_ioctl (ide_drive_t *drive, struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg);
742: int idescsi_open (struct inode *inode, struct file *filp, ide_drive_t *drive);
743: void idescsi_ide_release (struct inode *inode, struct file *filp, ide_drive_t *drive);
744: #endif /* CONFIG_BLK_DEV_IDESCSI */
745:
746: #ifdef CONFIG_BLK_DEV_TRITON
747: void ide_init_triton (byte, byte);
748: void ide_init_promise (byte bus, byte fn, ide_hwif_t *hwif0, ide_hwif_t *hwif1, unsigned short dma);
749: #endif /* CONFIG_BLK_DEV_TRITON */
This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.