![[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 / i386 / i386at / gpl / linux / block|
Return to ide.h CVS log | Up to [GnuMach] / Gnu-Mach / i386 / i386at / gpl / linux / 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 */
26: #define INITIAL_MULT_COUNT 0 /* off=0; on=2,4,8,16,32, etc.. */
27:
28: #ifndef SUPPORT_VLB_SYNC /* 1 to support weird 32-bit chips */
29: #define SUPPORT_VLB_SYNC 1 /* 0 to reduce kernel size */
30: #endif
31: #ifndef DISK_RECOVERY_TIME /* off=0; on=access_delay_time */
32: #define DISK_RECOVERY_TIME 0 /* for hardware that needs it */
33: #endif
34: #ifndef OK_TO_RESET_CONTROLLER /* 1 needed for good error recovery */
35: #define OK_TO_RESET_CONTROLLER 1 /* 0 for use with AH2372A/B interface */
36: #endif
37: #ifndef FAKE_FDISK_FOR_EZDRIVE /* 1 to help linux fdisk with EZDRIVE */
38: #define FAKE_FDISK_FOR_EZDRIVE 1 /* 0 to reduce kernel size */
39: #endif
40: #ifndef FANCY_STATUS_DUMPS /* 1 for human-readable drive errors */
41: #define FANCY_STATUS_DUMPS 1 /* 0 to reduce kernel size */
42: #endif
43:
44: #if defined(CONFIG_BLK_DEV_IDECD) || defined(CONFIG_BLK_DEV_IDETAPE)
45: #define CONFIG_BLK_DEV_IDEATAPI 1
46: #endif
47:
48: /*
49: * IDE_DRIVE_CMD is used to implement many features of the hdparm utility
50: */
51: #define IDE_DRIVE_CMD 99 /* (magic) undef to reduce kernel size*/
52:
53: /*
54: * "No user-serviceable parts" beyond this point :)
55: *****************************************************************************/
56:
57: typedef unsigned char byte; /* used everywhere */
58:
59: /*
60: * Probably not wise to fiddle with these
61: */
62: #define ERROR_MAX 8 /* Max read/write errors per sector */
63: #define ERROR_RESET 3 /* Reset controller every 4th retry */
64: #define ERROR_RECAL 1 /* Recalibrate every 2nd retry */
65:
66: /*
67: * Ensure that various configuration flags have compatible settings
68: */
69: #ifdef REALLY_SLOW_IO
70: #undef REALLY_FAST_IO
71: #endif
72:
73: /*
74: * Definitions for accessing IDE controller registers
75: */
76:
77: #define HWIF(drive) ((ide_hwif_t *)drive->hwif)
78: #define HWGROUP(drive) ((ide_hwgroup_t *)(HWIF(drive)->hwgroup))
79:
80: #define IDE_DATA_OFFSET (0)
81: #define IDE_ERROR_OFFSET (1)
82: #define IDE_NSECTOR_OFFSET (2)
83: #define IDE_SECTOR_OFFSET (3)
84: #define IDE_LCYL_OFFSET (4)
85: #define IDE_HCYL_OFFSET (5)
86: #define IDE_SELECT_OFFSET (6)
87: #define IDE_STATUS_OFFSET (7)
88: #define IDE_FEATURE_OFFSET IDE_ERROR_OFFSET
89: #define IDE_COMMAND_OFFSET IDE_STATUS_OFFSET
90:
91: #define IDE_DATA_REG (HWIF(drive)->io_base+IDE_DATA_OFFSET)
92: #define IDE_ERROR_REG (HWIF(drive)->io_base+IDE_ERROR_OFFSET)
93: #define IDE_NSECTOR_REG (HWIF(drive)->io_base+IDE_NSECTOR_OFFSET)
94: #define IDE_SECTOR_REG (HWIF(drive)->io_base+IDE_SECTOR_OFFSET)
95: #define IDE_LCYL_REG (HWIF(drive)->io_base+IDE_LCYL_OFFSET)
96: #define IDE_HCYL_REG (HWIF(drive)->io_base+IDE_HCYL_OFFSET)
97: #define IDE_SELECT_REG (HWIF(drive)->io_base+IDE_SELECT_OFFSET)
98: #define IDE_STATUS_REG (HWIF(drive)->io_base+IDE_STATUS_OFFSET)
99: #define IDE_CONTROL_REG (HWIF(drive)->ctl_port)
100: #define IDE_FEATURE_REG IDE_ERROR_REG
101: #define IDE_COMMAND_REG IDE_STATUS_REG
102: #define IDE_ALTSTATUS_REG IDE_CONTROL_REG
103:
104: #ifdef REALLY_FAST_IO
105: #define OUT_BYTE(b,p) outb((b),p)
106: #define IN_BYTE(p) (byte)inb(p)
107: #else
108: #define OUT_BYTE(b,p) outb_p((b),p)
109: #define IN_BYTE(p) (byte)inb_p(p)
110: #endif /* REALLY_FAST_IO */
111:
112: #define GET_ERR() IN_BYTE(IDE_ERROR_REG)
113: #define GET_STAT() IN_BYTE(IDE_STATUS_REG)
114: #define OK_STAT(stat,good,bad) (((stat)&((good)|(bad)))==(good))
115: #define BAD_R_STAT (BUSY_STAT | ERR_STAT)
116: #define BAD_W_STAT (BAD_R_STAT | WRERR_STAT)
117: #define BAD_STAT (BAD_R_STAT | DRQ_STAT)
118: #define DRIVE_READY (READY_STAT | SEEK_STAT)
119: #define DATA_READY (DRIVE_READY | DRQ_STAT)
120:
121: /*
122: * Some more useful definitions
123: */
124: #define IDE_MAJOR_NAME "ide" /* the same for all i/f; see also genhd.c */
125: #define MAJOR_NAME IDE_MAJOR_NAME
126: #define PARTN_BITS 6 /* number of minor dev bits for partitions */
127: #define PARTN_MASK ((1<<PARTN_BITS)-1) /* a useful bit mask */
128: #define MAX_DRIVES 2 /* per interface; 2 assumed by lots of code */
129: #define MAX_HWIFS 4 /* an arbitrary, but realistic limit */
130: #define SECTOR_WORDS (512 / 4) /* number of 32bit words per sector */
131:
132: /*
133: * Timeouts for various operations:
134: */
135: #define WAIT_DRQ (5*HZ/100) /* 50msec - spec allows up to 20ms */
136: #define WAIT_READY (3*HZ/100) /* 30msec - should be instantaneous */
137: #define WAIT_PIDENTIFY (1*HZ) /* 1sec - should be less than 3ms (?) */
138: #define WAIT_WORSTCASE (30*HZ) /* 30sec - worst case when spinning up */
139: #define WAIT_CMD (10*HZ) /* 10sec - maximum wait for an IRQ to happen */
140:
141: #ifdef CONFIG_BLK_DEV_IDETAPE
142: #include "ide-tape.h"
143: #endif /* CONFIG_BLK_DEV_IDETAPE */
144:
145: #ifdef CONFIG_BLK_DEV_IDECD
146:
147: struct atapi_request_sense {
148: unsigned char error_code : 7;
149: unsigned char valid : 1;
150: byte reserved1;
151: unsigned char sense_key : 4;
152: unsigned char reserved2 : 1;
153: unsigned char ili : 1;
154: unsigned char reserved3 : 2;
155: byte info[4];
156: byte sense_len;
157: byte command_info[4];
158: byte asc;
159: byte ascq;
160: byte fru;
161: byte sense_key_specific[3];
162: };
163:
164: struct packet_command {
165: char *buffer;
166: int buflen;
167: int stat;
168: struct atapi_request_sense *sense_data;
169: unsigned char c[12];
170: };
171:
172: /* Space to hold the disk TOC. */
173:
174: #define MAX_TRACKS 99
175: struct atapi_toc_header {
176: unsigned short toc_length;
177: byte first_track;
178: byte last_track;
179: };
180:
181: struct atapi_toc_entry {
182: byte reserved1;
183: unsigned control : 4;
184: unsigned adr : 4;
185: byte track;
186: byte reserved2;
187: union {
188: unsigned lba;
189: struct {
190: byte reserved3;
191: byte m;
192: byte s;
193: byte f;
194: } msf;
195: } addr;
196: };
197:
198: struct atapi_toc {
199: int last_session_lba;
200: int xa_flag;
201: unsigned capacity;
202: struct atapi_toc_header hdr;
203: struct atapi_toc_entry ent[MAX_TRACKS+1]; /* One extra for the leadout. */
204: };
205:
206:
207: /* This structure is annoyingly close to, but not identical with,
208: the cdrom_subchnl structure from cdrom.h. */
209: struct atapi_cdrom_subchnl
210: {
211: u_char acdsc_reserved;
212: u_char acdsc_audiostatus;
213: u_short acdsc_length;
214: u_char acdsc_format;
215:
216: u_char acdsc_adr: 4;
217: u_char acdsc_ctrl: 4;
218: u_char acdsc_trk;
219: u_char acdsc_ind;
220: union
221: {
222: struct
223: {
224: u_char minute;
225: u_char second;
226: u_char frame;
227: } msf;
228: int lba;
229: } acdsc_absaddr;
230: union
231: {
232: struct
233: {
234: u_char minute;
235: u_char second;
236: u_char frame;
237: } msf;
238: int lba;
239: } acdsc_reladdr;
240: };
241:
242:
243: /* Extra per-device info for cdrom drives. */
244: struct cdrom_info {
245:
246: /* Buffer for table of contents. NULL if we haven't allocated
247: a TOC buffer for this device yet. */
248:
249: struct atapi_toc *toc;
250:
251: /* Sector buffer. If a read request wants only the first part of a cdrom
252: block, we cache the rest of the block here, in the expectation that that
253: data is going to be wanted soon. SECTOR_BUFFERED is the number of the
254: first buffered sector, and NSECTORS_BUFFERED is the number of sectors
255: in the buffer. Before the buffer is allocated, we should have
256: SECTOR_BUFFER == NULL and NSECTORS_BUFFERED == 0. */
257:
258: unsigned long sector_buffered;
259: unsigned long nsectors_buffered;
260: char *sector_buffer;
261:
262: /* The result of the last successful request sense command
263: on this device. */
264: struct atapi_request_sense sense_data;
265: };
266:
267: #endif /* CONFIG_BLK_DEV_IDECD */
268:
269: /*
270: * Now for the data we need to maintain per-drive: ide_drive_t
271: */
272:
273: typedef enum {ide_disk, ide_cdrom, ide_tape} ide_media_t;
274:
275: typedef union {
276: unsigned all : 8; /* all of the bits together */
277: struct {
278: unsigned set_geometry : 1; /* respecify drive geometry */
279: unsigned recalibrate : 1; /* seek to cyl 0 */
280: unsigned set_multmode : 1; /* set multmode count */
281: unsigned set_pio : 1; /* set pio mode */
282: unsigned reserved : 4; /* unused */
283: } b;
284: } special_t;
285:
286: typedef union {
287: unsigned all : 8; /* all of the bits together */
288: struct {
289: unsigned head : 4; /* always zeros here */
290: unsigned unit : 1; /* drive select number, 0 or 1 */
291: unsigned bit5 : 1; /* always 1 */
292: unsigned lba : 1; /* using LBA instead of CHS */
293: unsigned bit7 : 1; /* always 1 */
294: } b;
295: } select_t;
296:
297: typedef struct ide_drive_s {
298: special_t special; /* special action flags */
299: unsigned present : 1; /* drive is physically present */
300: unsigned noprobe : 1; /* from: hdx=noprobe */
301: unsigned keep_settings : 1; /* restore settings after drive reset */
302: unsigned busy : 1; /* currently doing revalidate_disk() */
303: unsigned removeable : 1; /* 1 if need to do check_media_change */
304: unsigned using_dma : 1; /* disk is using dma for read/write */
305: unsigned forced_geom : 1; /* 1 if hdx=c,h,s was given at boot */
306: unsigned unmask : 1; /* flag: okay to unmask other irqs */
307: unsigned autotune : 2; /* 1=autotune, 2=noautotune, 0=default */
308: #if FAKE_FDISK_FOR_EZDRIVE
309: unsigned remap_0_to_1 : 1; /* flag: partitioned with ezdrive */
310: #endif /* FAKE_FDISK_FOR_EZDRIVE */
311: ide_media_t media; /* disk, cdrom, tape */
312: select_t select; /* basic drive/head select reg value */
313: byte ctl; /* "normal" value for IDE_CONTROL_REG */
314: byte ready_stat; /* min status value for drive ready */
315: byte mult_count; /* current multiple sector setting */
316: byte mult_req; /* requested multiple sector setting */
317: byte pio_req; /* requested multiple sector setting */
318: byte io_32bit; /* 0=16-bit, 1=32-bit, 2/3=32bit+sync */
319: byte bad_wstat; /* used for ignoring WRERR_STAT */
320: byte sect0; /* offset of first sector for DM6:DDO */
321: byte usage; /* current "open()" count for drive */
322: byte head; /* "real" number of heads */
323: byte sect; /* "real" sectors per track */
324: byte bios_head; /* BIOS/fdisk/LILO number of heads */
325: byte bios_sect; /* BIOS/fdisk/LILO sectors per track */
326: unsigned short bios_cyl; /* BIOS/fdisk/LILO number of cyls */
327: unsigned short cyl; /* "real" number of cyls */
328: void *hwif; /* actually (ide_hwif_t *) */
329: struct wait_queue *wqueue; /* used to wait for drive in open() */
330: struct hd_driveid *id; /* drive model identification info */
331: struct hd_struct *part; /* drive partition table */
332: char name[4]; /* drive name, such as "hda" */
333: #ifdef CONFIG_BLK_DEV_IDECD
334: struct cdrom_info cdrom_info; /* for ide-cd.c */
335: #endif /* CONFIG_BLK_DEV_IDECD */
336: #ifdef CONFIG_BLK_DEV_IDETAPE
337: idetape_tape_t tape; /* for ide-tape.c */
338: #endif /* CONFIG_BLK_DEV_IDETAPE */
339:
340: } ide_drive_t;
341:
342: /*
343: * An ide_dmaproc_t() initiates/aborts DMA read/write operations on a drive.
344: *
345: * The caller is assumed to have selected the drive and programmed the drive's
346: * sector address using CHS or LBA. All that remains is to prepare for DMA
347: * and then issue the actual read/write DMA/PIO command to the drive.
348: *
349: * Returns 0 if all went well.
350: * Returns 1 if DMA read/write could not be started, in which case the caller
351: * should either try again later, or revert to PIO for the current request.
352: */
353: typedef enum { ide_dma_read = 0, ide_dma_write = 1,
354: ide_dma_abort = 2, ide_dma_check = 3,
355: ide_dma_status_bad = 4, ide_dma_transferred = 5,
356: ide_dma_begin = 6 }
357: ide_dma_action_t;
358:
359: typedef int (ide_dmaproc_t)(ide_dma_action_t, ide_drive_t *);
360:
361:
362: /*
363: * An ide_tuneproc_t() is used to set the speed of an IDE interface
364: * to a particular PIO mode. The "byte" parameter is used
365: * to select the PIO mode by number (0,1,2,3,4,5), and a value of 255
366: * indicates that the interface driver should "auto-tune" the PIO mode
367: * according to the drive capabilities in drive->id;
368: *
369: * Not all interface types support tuning, and not all of those
370: * support all possible PIO settings. They may silently ignore
371: * or round values as they see fit.
372: */
373: typedef void (ide_tuneproc_t)(ide_drive_t *, byte);
374:
375: /*
376: * This is used to provide HT6560B interface support.
377: * It will probably also be used by the DC4030VL driver.
378: */
379: typedef void (ide_selectproc_t) (ide_drive_t *);
380:
381: /*
382: * hwif_chipset_t is used to keep track of the specific hardware
383: * chipset used by each IDE interface, if known.
384: */
385: typedef enum { ide_unknown, ide_generic, ide_triton,
386: ide_cmd640, ide_dtc2278, ide_ali14xx,
387: ide_qd6580, ide_umc8672, ide_ht6560b }
388: hwif_chipset_t;
389:
390: typedef struct hwif_s {
391: struct hwif_s *next; /* for linked-list in ide_hwgroup_t */
392: void *hwgroup; /* actually (ide_hwgroup_t *) */
393: unsigned short io_base; /* base io port addr */
394: unsigned short ctl_port; /* usually io_base+0x206 */
395: ide_drive_t drives[MAX_DRIVES]; /* drive info */
396: struct gendisk *gd; /* gendisk structure */
397: ide_tuneproc_t *tuneproc; /* routine to tune PIO mode for drives */
398: #ifdef CONFIG_BLK_DEV_HT6560B
399: ide_selectproc_t *selectproc; /* tweaks hardware to select drive */
400: #endif /* CONFIG_BLK_DEV_HT6560B */
401: ide_dmaproc_t *dmaproc; /* dma read/write/abort routine */
402: unsigned long *dmatable; /* dma physical region descriptor table */
403: unsigned short dma_base; /* base addr for dma ports (triton) */
404: byte irq; /* our irq number */
405: byte major; /* our major number */
406: char name[5]; /* name of interface, eg. "ide0" */
407: byte index; /* 0 for ide0; 1 for ide1; ... */
408: hwif_chipset_t chipset; /* sub-module for tuning.. */
409: unsigned noprobe : 1; /* don't probe for this interface */
410: unsigned present : 1; /* this interface exists */
411: unsigned serialized : 1; /* valid only for ide_hwifs[0] */
412: unsigned no_unmask : 1; /* disallow setting unmask bits */
413: #if (DISK_RECOVERY_TIME > 0)
414: unsigned long last_time; /* time when previous rq was done */
415: #endif
416: #ifdef CONFIG_BLK_DEV_IDECD
417: struct request request_sense_request; /* from ide-cd.c */
418: struct packet_command request_sense_pc; /* from ide-cd.c */
419: #endif /* CONFIG_BLK_DEV_IDECD */
420: #ifdef CONFIG_BLK_DEV_IDETAPE
421: ide_drive_t *tape_drive; /* Pointer to the tape on this interface */
422: #endif /* CONFIG_BLK_DEV_IDETAPE */
423: } ide_hwif_t;
424:
425: /*
426: * internal ide interrupt handler type
427: */
428: typedef void (ide_handler_t)(ide_drive_t *);
429:
430: typedef struct hwgroup_s {
431: ide_handler_t *handler;/* irq handler, if active */
432: ide_drive_t *drive; /* current drive */
433: ide_hwif_t *hwif; /* ptr to current hwif in linked-list */
434: struct request *rq; /* current request */
435: struct timer_list timer; /* failsafe timer */
436: struct request wrq; /* local copy of current write rq */
437: unsigned long poll_timeout; /* timeout value during long polls */
438: } ide_hwgroup_t;
439:
440: /*
441: * ide_hwifs[] is the master data structure used to keep track
442: * of just about everything in ide.c. Whenever possible, routines
443: * should be using pointers to a drive (ide_drive_t *) or
444: * pointers to a hwif (ide_hwif_t *), rather than indexing this
445: * structure directly (the allocation/layout may change!).
446: */
447: #ifdef _IDE_C
448: ide_hwif_t ide_hwifs[MAX_HWIFS]; /* master data repository */
449: #else
450: extern ide_hwif_t ide_hwifs[];
451: #endif
452:
453: /*
454: * One final include file, which references some of the data/defns from above
455: */
456: #define IDE_DRIVER /* "parameter" for blk.h */
457: #include <linux/blk.h>
458:
459: #if (DISK_RECOVERY_TIME > 0)
460: void ide_set_recovery_timer (ide_hwif_t *);
461: #define SET_RECOVERY_TIMER(drive) ide_set_recovery_timer (drive)
462: #else
463: #define SET_RECOVERY_TIMER(drive)
464: #endif
465:
466: /*
467: * This is used for (nearly) all data transfers from the IDE interface
468: */
469: void ide_input_data (ide_drive_t *drive, void *buffer, unsigned int wcount);
470:
471: /*
472: * This is used for (nearly) all data transfers to the IDE interface
473: */
474: void ide_output_data (ide_drive_t *drive, void *buffer, unsigned int wcount);
475:
476: /*
477: * This is used on exit from the driver, to designate the next irq handler
478: * and also to start the safety timer.
479: */
480: void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler, unsigned int timeout);
481:
482: /*
483: * Error reporting, in human readable form (luxurious, but a memory hog).
484: */
485: byte ide_dump_status (ide_drive_t *drive, const char *msg, byte stat);
486:
487: /*
488: * ide_error() takes action based on the error returned by the controller.
489: * The calling function must return afterwards, to restart the request.
490: */
491: void ide_error (ide_drive_t *drive, const char *msg, byte stat);
492:
493: /*
494: * ide_fixstring() cleans up and (optionally) byte-swaps a text string,
495: * removing leading/trailing blanks and compressing internal blanks.
496: * It is primarily used to tidy up the model name/number fields as
497: * returned by the WIN_[P]IDENTIFY commands.
498: */
499: void ide_fixstring (byte *s, const int bytecount, const int byteswap);
500:
501: /*
502: * This routine busy-waits for the drive status to be not "busy".
503: * It then checks the status for all of the "good" bits and none
504: * of the "bad" bits, and if all is okay it returns 0. All other
505: * cases return 1 after invoking ide_error() -- caller should return.
506: *
507: */
508: int ide_wait_stat (ide_drive_t *drive, byte good, byte bad, unsigned long timeout);
509:
510: /*
511: * This routine is called from the partition-table code in genhd.c
512: * to "convert" a drive to a logical geometry with fewer than 1024 cyls.
513: *
514: * The second parameter, "xparm", determines exactly how the translation
515: * will be handled:
516: * 0 = convert to CHS with fewer than 1024 cyls
517: * using the same method as Ontrack DiskManager.
518: * 1 = same as "0", plus offset everything by 63 sectors.
519: * -1 = similar to "0", plus redirect sector 0 to sector 1.
520: * >1 = convert to a CHS geometry with "xparm" heads.
521: *
522: * Returns 0 if the translation was not possible, if the device was not
523: * an IDE disk drive, or if a geometry was "forced" on the commandline.
524: * Returns 1 if the geometry translation was successful.
525: */
526: int ide_xlate_1024 (kdev_t, int, const char *);
527:
528: /*
529: * Start a reset operation for an IDE interface.
530: * The caller should return immediately after invoking this.
531: */
532: void ide_do_reset (ide_drive_t *);
533:
534: /*
535: * This function is intended to be used prior to invoking ide_do_drive_cmd().
536: */
537: void ide_init_drive_cmd (struct request *rq);
538:
539: /*
540: * "action" parameter type for ide_do_drive_cmd() below.
541: */
542: typedef enum
543: {ide_wait, /* insert rq at end of list, and wait for it */
544: ide_next, /* insert rq immediately after current request */
545: ide_preempt, /* insert rq in front of current request */
546: ide_end} /* insert rq at end of list, but don't wait for it */
547: ide_action_t;
548:
549: /*
550: * This function issues a special IDE device request
551: * onto the request queue.
552: *
553: * If action is ide_wait, then then rq is queued at the end of
554: * the request queue, and the function sleeps until it has been
555: * processed. This is for use when invoked from an ioctl handler.
556: *
557: * If action is ide_preempt, then the rq is queued at the head of
558: * the request queue, displacing the currently-being-processed
559: * request and this function returns immediately without waiting
560: * for the new rq to be completed. This is VERY DANGEROUS, and is
561: * intended for careful use by the ATAPI tape/cdrom driver code.
562: *
563: * If action is ide_next, then the rq is queued immediately after
564: * the currently-being-processed-request (if any), and the function
565: * returns without waiting for the new rq to be completed. As above,
566: * This is VERY DANGEROUS, and is intended for careful use by the
567: * ATAPI tape/cdrom driver code.
568: *
569: * If action is ide_end, then the rq is queued at the end of the
570: * request queue, and the function returns immediately without waiting
571: * for the new rq to be completed. This is again intended for careful
572: * use by the ATAPI tape/cdrom driver code. (Currently used by ide-tape.c,
573: * when operating in the pipelined operation mode).
574: */
575: int ide_do_drive_cmd (ide_drive_t *drive, struct request *rq, ide_action_t action);
576:
577: /*
578: * Clean up after success/failure of an explicit drive cmd.
579: * stat/err are used only when (HWGROUP(drive)->rq->cmd == IDE_DRIVE_CMD).
580: */
581: void ide_end_drive_cmd (ide_drive_t *drive, byte stat, byte err);
582:
583: #ifdef CONFIG_BLK_DEV_IDECD
584: /*
585: * These are routines in ide-cd.c invoked from ide.c
586: */
587: void ide_do_rw_cdrom (ide_drive_t *, unsigned long);
588: int ide_cdrom_ioctl (ide_drive_t *, struct inode *, struct file *, unsigned int, unsigned long);
589: int ide_cdrom_check_media_change (ide_drive_t *);
590: int ide_cdrom_open (struct inode *, struct file *, ide_drive_t *);
591: void ide_cdrom_release (struct inode *, struct file *, ide_drive_t *);
592: void ide_cdrom_setup (ide_drive_t *);
593: #endif /* CONFIG_BLK_DEV_IDECD */
594:
595: #ifdef CONFIG_BLK_DEV_IDETAPE
596:
597: /*
598: * Functions in ide-tape.c which are invoked from ide.c:
599: */
600:
601: /*
602: * idetape_identify_device is called during device probing stage to
603: * probe for an ide atapi tape drive and to initialize global variables
604: * in ide-tape.c which provide the link between the character device
605: * and the correspoding block device.
606: *
607: * Returns 1 if an ide tape was detected and is supported.
608: * Returns 0 otherwise.
609: */
610:
611: int idetape_identify_device (ide_drive_t *drive,struct hd_driveid *id);
612:
613: /*
614: * idetape_setup is called a bit later than idetape_identify_device,
615: * during the search for disk partitions, to initialize various tape
616: * state variables in ide_drive_t *drive.
617: */
618:
619: void idetape_setup (ide_drive_t *drive);
620:
621: /*
622: * idetape_do_request is our request function. It is called by ide.c
623: * to process a new request.
624: */
625:
626: void idetape_do_request (ide_drive_t *drive, struct request *rq, unsigned long block);
627:
628: /*
629: * idetape_end_request is used to finish servicing a request, and to
630: * insert a pending pipeline request into the main device queue.
631: */
632:
633: void idetape_end_request (byte uptodate, ide_hwgroup_t *hwgroup);
634:
635: /*
636: * Block device interface functions.
637: */
638:
639: int idetape_blkdev_ioctl (ide_drive_t *drive, struct inode *inode, struct file *file,
640: unsigned int cmd, unsigned long arg);
641: int idetape_blkdev_open (struct inode *inode, struct file *filp, ide_drive_t *drive);
642: void idetape_blkdev_release (struct inode *inode, struct file *filp, ide_drive_t *drive);
643:
644: /*
645: * idetape_register_chrdev initializes the character device interface to
646: * the ide tape drive.
647: */
648:
649: void idetape_register_chrdev (void);
650:
651: #endif /* CONFIG_BLK_DEV_IDETAPE */
652:
653: #ifdef CONFIG_BLK_DEV_TRITON
654: void ide_init_triton (byte, byte);
655: #endif /* CONFIG_BLK_DEV_TRITON */
This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.