1 /*
2 * linux/drivers/ide/ide-disk.c Version 1.10 June 9, 2000
3 *
4 * Copyright (C) 1994-1998 Linus Torvalds & authors (see below)
5 */
6
7 /*
8 * Mostly written by Mark Lord <mlord@pobox.com>
9 * and Gadi Oxman <gadio@netvision.net.il>
10 * and Andre Hedrick <andre@linux-ide.org>
11 *
12 * This is the IDE/ATA disk driver, as evolved from hd.c and ide.c.
13 *
14 * Version 1.00 move disk only code from ide.c to ide-disk.c
15 * support optional byte-swapping of all data
16 * Version 1.01 fix previous byte-swapping code
17 * Version 1.02 remove ", LBA" from drive identification msgs
18 * Version 1.03 fix display of id->buf_size for big-endian
19 * Version 1.04 add /proc configurable settings and S.M.A.R.T support
20 * Version 1.05 add capacity support for ATA3 >= 8GB
21 * Version 1.06 get boot-up messages to show full cyl count
22 * Version 1.07 disable door-locking if it fails
23 * Version 1.08 fixed CHS/LBA translations for ATA4 > 8GB,
24 * process of adding new ATA4 compliance.
25 * fixed problems in allowing fdisk to see
26 * the entire disk.
27 * Version 1.09 added increment of rq->sector in ide_multwrite
28 * added UDMA 3/4 reporting
29 * Version 1.10 request queue changes, Ultra DMA 100
30 */
31
32 #define IDEDISK_VERSION "1.10"
33
34 #undef REALLY_SLOW_IO /* most systems can safely undef this */
35
36 #include <linux/config.h>
37 #include <linux/module.h>
38 #include <linux/types.h>
39 #include <linux/string.h>
40 #include <linux/kernel.h>
41 #include <linux/timer.h>
42 #include <linux/mm.h>
43 #include <linux/interrupt.h>
44 #include <linux/major.h>
45 #include <linux/errno.h>
46 #include <linux/genhd.h>
47 #include <linux/malloc.h>
48 #include <linux/delay.h>
49 #include <linux/ide.h>
50
51 #include <asm/byteorder.h>
52 #include <asm/irq.h>
53 #include <asm/uaccess.h>
54 #include <asm/io.h>
55
56 #ifdef CONFIG_BLK_DEV_PDC4030
57 #define IS_PDC4030_DRIVE (HWIF(drive)->chipset == ide_pdc4030)
58 #else
59 #define IS_PDC4030_DRIVE (0) /* auto-NULLs out pdc4030 code */
60 #endif
61
62 static void idedisk_bswap_data (void *buffer, int wcount)
63 {
64 u16 *p = buffer;
65
66 while (wcount--) {
67 *p = *p << 8 | *p >> 8; p++;
68 *p = *p << 8 | *p >> 8; p++;
69 }
70 }
71
72 static inline void idedisk_input_data (ide_drive_t *drive, void *buffer, unsigned int wcount)
73 {
74 ide_input_data(drive, buffer, wcount);
75 if (drive->bswap)
76 idedisk_bswap_data(buffer, wcount);
77 }
78
79 static inline void idedisk_output_data (ide_drive_t *drive, void *buffer, unsigned int wcount)
80 {
81 if (drive->bswap) {
82 idedisk_bswap_data(buffer, wcount);
83 ide_output_data(drive, buffer, wcount);
84 idedisk_bswap_data(buffer, wcount);
85 } else
86 ide_output_data(drive, buffer, wcount);
87 }
88
89 /*
90 * lba_capacity_is_ok() performs a sanity check on the claimed "lba_capacity"
91 * value for this drive (from its reported identification information).
92 *
93 * Returns: 1 if lba_capacity looks sensible
94 * 0 otherwise
95 *
96 * It is called only once for each drive.
97 */
98 static int lba_capacity_is_ok (struct hd_driveid *id)
99 {
100 unsigned long lba_sects, chs_sects, head, tail;
101
102 /*
103 * The ATA spec tells large drives to return
104 * C/H/S = 16383/16/63 independent of their size.
105 * Some drives can be jumpered to use 15 heads instead of 16.
106 * Some drives can be jumpered to use 4092 cyls instead of 16383.
107 */
108 if ((id->cyls == 16383
109 || (id->cyls == 4092 && id->cur_cyls == 16383)) &&
110 id->sectors == 63 &&
111 (id->heads == 15 || id->heads == 16) &&
112 id->lba_capacity >= 16383*63*id->heads)
113 return 1;
114
115 lba_sects = id->lba_capacity;
116 chs_sects = id->cyls * id->heads * id->sectors;
117
118 /* perform a rough sanity check on lba_sects: within 10% is OK */
119 if ((lba_sects - chs_sects) < chs_sects/10)
120 return 1;
121
122 /* some drives have the word order reversed */
123 head = ((lba_sects >> 16) & 0xffff);
124 tail = (lba_sects & 0xffff);
125 lba_sects = (head | (tail << 16));
126 if ((lba_sects - chs_sects) < chs_sects/10) {
127 id->lba_capacity = lba_sects;
128 return 1; /* lba_capacity is (now) good */
129 }
130
131 return 0; /* lba_capacity value may be bad */
132 }
133
134 /*
135 * read_intr() is the handler for disk read/multread interrupts
136 */
137 static ide_startstop_t read_intr (ide_drive_t *drive)
138 {
139 byte stat;
140 int i;
141 unsigned int msect, nsect;
142 struct request *rq;
143
144 /* new way for dealing with premature shared PCI interrupts */
145 if (!OK_STAT(stat=GET_STAT(),DATA_READY,BAD_R_STAT)) {
146 if (stat & (ERR_STAT|DRQ_STAT)) {
147 return ide_error(drive, "read_intr", stat);
148 }
149 /* no data yet, so wait for another interrupt */
150 ide_set_handler(drive, &read_intr, WAIT_CMD, NULL);
151 return ide_started;
152 }
153 msect = drive->mult_count;
154
155 read_next:
156 rq = HWGROUP(drive)->rq;
157 if (msect) {
158 if ((nsect = rq->current_nr_sectors) > msect)
159 nsect = msect;
160 msect -= nsect;
161 } else
162 nsect = 1;
163 idedisk_input_data(drive, rq->buffer, nsect * SECTOR_WORDS);
164 #ifdef DEBUG
165 printk("%s: read: sectors(%ld-%ld), buffer=0x%08lx, remaining=%ld\n",
166 drive->name, rq->sector, rq->sector+nsect-1,
167 (unsigned long) rq->buffer+(nsect<<9), rq->nr_sectors-nsect);
168 #endif
169 rq->sector += nsect;
170 rq->buffer += nsect<<9;
171 rq->errors = 0;
172 i = (rq->nr_sectors -= nsect);
173 if (((long)(rq->current_nr_sectors -= nsect)) <= 0)
174 ide_end_request(1, HWGROUP(drive));
175 if (i > 0) {
176 if (msect)
177 goto read_next;
178 ide_set_handler (drive, &read_intr, WAIT_CMD, NULL);
179 return ide_started;
180 }
181 return ide_stopped;
182 }
183
184 /*
185 * write_intr() is the handler for disk write interrupts
186 */
187 static ide_startstop_t write_intr (ide_drive_t *drive)
188 {
189 byte stat;
190 int i;
191 ide_hwgroup_t *hwgroup = HWGROUP(drive);
192 struct request *rq = hwgroup->rq;
193
194 if (!OK_STAT(stat=GET_STAT(),DRIVE_READY,drive->bad_wstat)) {
195 printk("%s: write_intr error1: nr_sectors=%ld, stat=0x%02x\n", drive->name, rq->nr_sectors, stat);
196 } else {
197 #ifdef DEBUG
198 printk("%s: write: sector %ld, buffer=0x%08lx, remaining=%ld\n",
199 drive->name, rq->sector, (unsigned long) rq->buffer,
200 rq->nr_sectors-1);
201 #endif
202 if ((rq->nr_sectors == 1) ^ ((stat & DRQ_STAT) != 0)) {
203 rq->sector++;
204 rq->buffer += 512;
205 rq->errors = 0;
206 i = --rq->nr_sectors;
207 --rq->current_nr_sectors;
208 if (((long)rq->current_nr_sectors) <= 0)
209 ide_end_request(1, hwgroup);
210 if (i > 0) {
211 idedisk_output_data (drive, rq->buffer, SECTOR_WORDS);
212 ide_set_handler (drive, &write_intr, WAIT_CMD, NULL);
213 return ide_started;
214 }
215 return ide_stopped;
216 }
217 return ide_stopped; /* the original code did this here (?) */
218 }
219 return ide_error(drive, "write_intr", stat);
220 }
221
222 /*
223 * ide_multwrite() transfers a block of up to mcount sectors of data
224 * to a drive as part of a disk multiple-sector write operation.
225 *
226 * Returns 0 if successful; returns 1 if request had to be aborted due to corrupted buffer list.
227 */
228 int ide_multwrite (ide_drive_t *drive, unsigned int mcount)
229 {
230 ide_hwgroup_t *hwgroup= HWGROUP(drive);
231
232 /*
233 * This may look a bit odd, but remember wrq is a copy of the
234 * request not the original. The pointers are real however so the
235 * bh's are not copies. Remember that or bad stuff will happen
236 *
237 * At the point we are called the drive has asked us for the
238 * data, and its our job to feed it, walking across bh boundaries
239 * if need be.
240 */
241
242 struct request *rq = &hwgroup->wrq;
243
244 do {
245 unsigned long flags;
246 unsigned int nsect = rq->current_nr_sectors;
247 if (nsect > mcount)
248 nsect = mcount;
249 mcount -= nsect;
250
251 idedisk_output_data(drive, rq->buffer, nsect<<7);
252 #ifdef DEBUG
253 printk("%s: multwrite: sector %ld, buffer=0x%08lx, count=%d, remaining=%ld\n",
254 drive->name, rq->sector, (unsigned long) rq->buffer,
255 nsect, rq->nr_sectors - nsect);
256 #endif
257 spin_lock_irqsave(&io_request_lock, flags); /* Is this really necessary? */
258 #ifdef CONFIG_BLK_DEV_PDC4030
259 rq->sector += nsect;
260 #endif
261 if (((long)(rq->nr_sectors -= nsect)) <= 0) {
262 #ifdef DEBUG
263 printk("%s: multwrite: count=%d, current=%ld\n",
264 drive->name, nsect, rq->nr_sectors);
265 #endif
266 spin_unlock_irqrestore(&io_request_lock, flags);
267 break;
268 }
269 if ((rq->current_nr_sectors -= nsect) == 0) {
270 if ((rq->bh = rq->bh->b_reqnext) != NULL) {
271 rq->current_nr_sectors = rq->bh->b_size>>9;
272 rq->buffer = rq->bh->b_data;
273 } else {
274 spin_unlock_irqrestore(&io_request_lock, flags);
275 printk("%s: buffer list corrupted (%ld, %ld, %d)\n",
276 drive->name, rq->current_nr_sectors,
277 rq->nr_sectors, nsect);
278 ide_end_request(0, hwgroup);
279 return 1;
280 }
281 } else {
282 /* Fix the pointer.. we ate data */
283 rq->buffer += nsect << 9;
284 }
285 spin_unlock_irqrestore(&io_request_lock, flags);
286 } while (mcount);
287 return 0;
288 }
289
290 /*
291 * multwrite_intr() is the handler for disk multwrite interrupts
292 */
293 static ide_startstop_t multwrite_intr (ide_drive_t *drive)
294 {
295 byte stat;
296 int i;
297 ide_hwgroup_t *hwgroup = HWGROUP(drive);
298 struct request *rq = &hwgroup->wrq;
299
300 if (OK_STAT(stat=GET_STAT(),DRIVE_READY,drive->bad_wstat)) {
301 if (stat & DRQ_STAT) {
302 /*
303 * The drive wants data. Remember rq is the copy
304 * of the request
305 */
306 if (rq->nr_sectors) {
307 if (ide_multwrite(drive, drive->mult_count))
308 return ide_stopped;
309 ide_set_handler (drive, &multwrite_intr, WAIT_CMD, NULL);
310 return ide_started;
311 }
312 } else {
313 /*
314 * If the copy has all the blocks completed then
315 * we can end the original request.
316 */
317 if (!rq->nr_sectors) { /* all done? */
318 rq = hwgroup->rq;
319 for (i = rq->nr_sectors; i > 0;){
320 i -= rq->current_nr_sectors;
321 ide_end_request(1, hwgroup);
322 }
323 return ide_stopped;
324 }
325 }
326 return ide_stopped; /* the original code did this here (?) */
327 }
328 return ide_error(drive, "multwrite_intr", stat);
329 }
330
331 /*
332 * set_multmode_intr() is invoked on completion of a WIN_SETMULT cmd.
333 */
334 static ide_startstop_t set_multmode_intr (ide_drive_t *drive)
335 {
336 byte stat;
337
338 if (OK_STAT(stat=GET_STAT(),READY_STAT,BAD_STAT)) {
339 drive->mult_count = drive->mult_req;
340 } else {
341 drive->mult_req = drive->mult_count = 0;
342 drive->special.b.recalibrate = 1;
343 (void) ide_dump_status(drive, "set_multmode", stat);
344 }
345 return ide_stopped;
346 }
347
348 /*
349 * set_geometry_intr() is invoked on completion of a WIN_SPECIFY cmd.
350 */
351 static ide_startstop_t set_geometry_intr (ide_drive_t *drive)
352 {
353 byte stat;
354
355 if (OK_STAT(stat=GET_STAT(),READY_STAT,BAD_STAT))
356 return ide_stopped;
357
358 if (stat & (ERR_STAT|DRQ_STAT))
359 return ide_error(drive, "set_geometry_intr", stat);
360
361 ide_set_handler(drive, &set_geometry_intr, WAIT_CMD, NULL);
362 return ide_started;
363 }
364
365 /*
366 * recal_intr() is invoked on completion of a WIN_RESTORE (recalibrate) cmd.
367 */
368 static ide_startstop_t recal_intr (ide_drive_t *drive)
369 {
370 byte stat = GET_STAT();
371
372 if (!OK_STAT(stat,READY_STAT,BAD_STAT))
373 return ide_error(drive, "recal_intr", stat);
374 return ide_stopped;
375 }
376
377 /*
378 * do_rw_disk() issues READ and WRITE commands to a disk,
379 * using LBA if supported, or CHS otherwise, to address sectors.
380 * It also takes care of issuing special DRIVE_CMDs.
381 */
382 static ide_startstop_t do_rw_disk (ide_drive_t *drive, struct request *rq, unsigned long block)
383 {
384 if (IDE_CONTROL_REG)
385 OUT_BYTE(drive->ctl,IDE_CONTROL_REG);
386 OUT_BYTE(rq->nr_sectors,IDE_NSECTOR_REG);
387 #ifdef CONFIG_BLK_DEV_PDC4030
388 if (drive->select.b.lba || IS_PDC4030_DRIVE) {
389 #else /* !CONFIG_BLK_DEV_PDC4030 */
390 if (drive->select.b.lba) {
391 #endif /* CONFIG_BLK_DEV_PDC4030 */
392 #ifdef DEBUG
393 printk("%s: %sing: LBAsect=%ld, sectors=%ld, buffer=0x%08lx\n",
394 drive->name, (rq->cmd==READ)?"read":"writ",
395 block, rq->nr_sectors, (unsigned long) rq->buffer);
396 #endif
397 OUT_BYTE(block,IDE_SECTOR_REG);
398 OUT_BYTE(block>>=8,IDE_LCYL_REG);
399 OUT_BYTE(block>>=8,IDE_HCYL_REG);
400 OUT_BYTE(((block>>8)&0x0f)|drive->select.all,IDE_SELECT_REG);
401 } else {
402 unsigned int sect,head,cyl,track;
403 track = block / drive->sect;
404 sect = block % drive->sect + 1;
405 OUT_BYTE(sect,IDE_SECTOR_REG);
406 head = track % drive->head;
407 cyl = track / drive->head;
408 OUT_BYTE(cyl,IDE_LCYL_REG);
409 OUT_BYTE(cyl>>8,IDE_HCYL_REG);
410 OUT_BYTE(head|drive->select.all,IDE_SELECT_REG);
411 #ifdef DEBUG
412 printk("%s: %sing: CHS=%d/%d/%d, sectors=%ld, buffer=0x%08lx\n",
413 drive->name, (rq->cmd==READ)?"read":"writ", cyl,
414 head, sect, rq->nr_sectors, (unsigned long) rq->buffer);
415 #endif
416 }
417 #ifdef CONFIG_BLK_DEV_PDC4030
418 if (IS_PDC4030_DRIVE) {
419 extern ide_startstop_t do_pdc4030_io(ide_drive_t *, struct request *);
420 return do_pdc4030_io (drive, rq);
421 }
422 #endif /* CONFIG_BLK_DEV_PDC4030 */
423 if (rq->cmd == READ) {
424 #ifdef CONFIG_BLK_DEV_IDEDMA
425 if (drive->using_dma && !(HWIF(drive)->dmaproc(ide_dma_read, drive)))
426 return ide_started;
427 #endif /* CONFIG_BLK_DEV_IDEDMA */
428 ide_set_handler(drive, &read_intr, WAIT_CMD, NULL);
429 OUT_BYTE(drive->mult_count ? WIN_MULTREAD : WIN_READ, IDE_COMMAND_REG);
430 return ide_started;
431 }
432 if (rq->cmd == WRITE) {
433 ide_startstop_t startstop;
434 #ifdef CONFIG_BLK_DEV_IDEDMA
435 if (drive->using_dma && !(HWIF(drive)->dmaproc(ide_dma_write, drive)))
436 return ide_started;
437 #endif /* CONFIG_BLK_DEV_IDEDMA */
438 OUT_BYTE(drive->mult_count ? WIN_MULTWRITE : WIN_WRITE, IDE_COMMAND_REG);
439 if (ide_wait_stat(&startstop, drive, DATA_READY, drive->bad_wstat, WAIT_DRQ)) {
440 printk(KERN_ERR "%s: no DRQ after issuing %s\n", drive->name,
441 drive->mult_count ? "MULTWRITE" : "WRITE");
442 return startstop;
443 }
444 if (!drive->unmask)
445 __cli(); /* local CPU only */
446 if (drive->mult_count) {
447 ide_hwgroup_t *hwgroup = HWGROUP(drive);
448 /*
449 * Ugh.. this part looks ugly because we MUST set up
450 * the interrupt handler before outputting the first block
451 * of data to be written. If we hit an error (corrupted buffer list)
452 * in ide_multwrite(), then we need to remove the handler/timer
453 * before returning. Fortunately, this NEVER happens (right?).
454 *
455 * Except when you get an error it seems...
456 */
457 hwgroup->wrq = *rq; /* scratchpad */
458 ide_set_handler (drive, &multwrite_intr, WAIT_CMD, NULL);
459 if (ide_multwrite(drive, drive->mult_count)) {
460 unsigned long flags;
461 spin_lock_irqsave(&io_request_lock, flags);
462 hwgroup->handler = NULL;
463 del_timer(&hwgroup->timer);
464 spin_unlock_irqrestore(&io_request_lock, flags);
465 return ide_stopped;
466 }
467 } else {
468 ide_set_handler (drive, &write_intr, WAIT_CMD, NULL);
469 idedisk_output_data(drive, rq->buffer, SECTOR_WORDS);
470 }
471 return ide_started;
472 }
473 printk(KERN_ERR "%s: bad command: %d\n", drive->name, rq->cmd);
474 ide_end_request(0, HWGROUP(drive));
475 return ide_stopped;
476 }
477
478 static int idedisk_open (struct inode *inode, struct file *filp, ide_drive_t *drive)
479 {
480 MOD_INC_USE_COUNT;
481 if (drive->removable && drive->usage == 1) {
482 check_disk_change(inode->i_rdev);
483 /*
484 * Ignore the return code from door_lock,
485 * since the open() has already succeeded,
486 * and the door_lock is irrelevant at this point.
487 */
488 if (drive->doorlocking && ide_wait_cmd(drive, WIN_DOORLOCK, 0, 0, 0, NULL))
489 drive->doorlocking = 0;
490 }
491 return 0;
492 }
493
494 static void idedisk_release (struct inode *inode, struct file *filp, ide_drive_t *drive)
495 {
496 if (drive->removable && !drive->usage) {
497 invalidate_buffers(inode->i_rdev);
498 if (drive->doorlocking && ide_wait_cmd(drive, WIN_DOORUNLOCK, 0, 0, 0, NULL))
499 drive->doorlocking = 0;
500 }
501 MOD_DEC_USE_COUNT;
502 }
503
504 static int idedisk_media_change (ide_drive_t *drive)
505 {
506 return drive->removable; /* if removable, always assume it was changed */
507 }
508
509 static void idedisk_revalidate (ide_drive_t *drive)
510 {
511 grok_partitions(HWIF(drive)->gd, drive->select.b.unit,
512 1<<PARTN_BITS,
513 current_capacity(drive));
514 }
515
516 /*
517 * Compute drive->capacity, the full capacity of the drive
518 * Called with drive->id != NULL.
519 */
520 static void init_idedisk_capacity (ide_drive_t *drive)
521 {
522 struct hd_driveid *id = drive->id;
523 unsigned long capacity = drive->cyl * drive->head * drive->sect;
524
525 drive->select.b.lba = 0;
526
527 /* Determine capacity, and use LBA if the drive properly supports it */
528 if ((id->capability & 2) && lba_capacity_is_ok(id)) {
529 capacity = id->lba_capacity;
530 drive->cyl = capacity / (drive->head * drive->sect);
531 drive->select.b.lba = 1;
532 }
533 drive->capacity = capacity;
534 }
535
536 static unsigned long idedisk_capacity (ide_drive_t *drive)
537 {
538 return (drive->capacity - drive->sect0);
539 }
540
541 static ide_startstop_t idedisk_special (ide_drive_t *drive)
542 {
543 special_t *s = &drive->special;
544
545 if (s->b.set_geometry) {
546 s->b.set_geometry = 0;
547 OUT_BYTE(drive->sect,IDE_SECTOR_REG);
548 OUT_BYTE(drive->cyl,IDE_LCYL_REG);
549 OUT_BYTE(drive->cyl>>8,IDE_HCYL_REG);
550 OUT_BYTE(((drive->head-1)|drive->select.all)&0xBF,IDE_SELECT_REG);
551 if (!IS_PDC4030_DRIVE)
552 ide_cmd(drive, WIN_SPECIFY, drive->sect, &set_geometry_intr);
553 } else if (s->b.recalibrate) {
554 s->b.recalibrate = 0;
555 if (!IS_PDC4030_DRIVE)
556 ide_cmd(drive, WIN_RESTORE, drive->sect, &recal_intr);
557 } else if (s->b.set_multmode) {
558 s->b.set_multmode = 0;
559 if (drive->id && drive->mult_req > drive->id->max_multsect)
560 drive->mult_req = drive->id->max_multsect;
561 if (!IS_PDC4030_DRIVE)
562 ide_cmd(drive, WIN_SETMULT, drive->mult_req, &set_multmode_intr);
563 } else if (s->all) {
564 int special = s->all;
565 s->all = 0;
566 printk(KERN_ERR "%s: bad special flag: 0x%02x\n", drive->name, special);
567 return ide_stopped;
568 }
569 return IS_PDC4030_DRIVE ? ide_stopped : ide_started;
570 }
571
572 static void idedisk_pre_reset (ide_drive_t *drive)
573 {
574 drive->special.all = 0;
575 drive->special.b.set_geometry = 1;
576 drive->special.b.recalibrate = 1;
577 if (OK_TO_RESET_CONTROLLER)
578 drive->mult_count = 0;
579 if (!drive->keep_settings && !drive->using_dma)
580 drive->mult_req = 0;
581 if (drive->mult_req != drive->mult_count)
582 drive->special.b.set_multmode = 1;
583 }
584
585 #ifdef CONFIG_PROC_FS
586
587 static int smart_enable(ide_drive_t *drive)
588 {
589 return ide_wait_cmd(drive, WIN_SMART, 0, SMART_ENABLE, 0, NULL);
590 }
591
592 static int get_smart_values(ide_drive_t *drive, byte *buf)
593 {
594 (void) smart_enable(drive);
595 return ide_wait_cmd(drive, WIN_SMART, 0, SMART_READ_VALUES, 1, buf);
596 }
597
598 static int get_smart_thresholds(ide_drive_t *drive, byte *buf)
599 {
600 (void) smart_enable(drive);
601 return ide_wait_cmd(drive, WIN_SMART, 0, SMART_READ_THRESHOLDS, 1, buf);
602 }
603
604 static int proc_idedisk_read_cache
605 (char *page, char **start, off_t off, int count, int *eof, void *data)
606 {
607 ide_drive_t *drive = (ide_drive_t *) data;
608 char *out = page;
609 int len;
610
611 if (drive->id)
612 len = sprintf(out,"%i\n", drive->id->buf_size / 2);
613 else
614 len = sprintf(out,"(none)\n");
615 PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
616 }
617
618 static int proc_idedisk_read_smart_thresholds
619 (char *page, char **start, off_t off, int count, int *eof, void *data)
620 {
621 ide_drive_t *drive = (ide_drive_t *)data;
622 int len = 0, i = 0;
623
624 if (!get_smart_thresholds(drive, page)) {
625 unsigned short *val = ((unsigned short *)page) + 2;
626 char *out = ((char *)val) + (SECTOR_WORDS * 4);
627 page = out;
628 do {
629 out += sprintf(out, "%04x%c", le16_to_cpu(*val), (++i & 7) ? ' ' : '\n');
630 val += 1;
631 } while (i < (SECTOR_WORDS * 2));
632 len = out - page;
633 }
634 PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
635 }
636
637 static int proc_idedisk_read_smart_values
638 (char *page, char **start, off_t off, int count, int *eof, void *data)
639 {
640 ide_drive_t *drive = (ide_drive_t *)data;
641 int len = 0, i = 0;
642
643 if (!get_smart_values(drive, page)) {
644 unsigned short *val = ((unsigned short *)page) + 2;
645 char *out = ((char *)val) + (SECTOR_WORDS * 4);
646 page = out;
647 do {
648 out += sprintf(out, "%04x%c", le16_to_cpu(*val), (++i & 7) ? ' ' : '\n');
649 val += 1;
650 } while (i < (SECTOR_WORDS * 2));
651 len = out - page;
652 }
653 PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
654 }
655
656 static ide_proc_entry_t idedisk_proc[] = {
657 { "cache", S_IFREG|S_IRUGO, proc_idedisk_read_cache, NULL },
658 { "geometry", S_IFREG|S_IRUGO, proc_ide_read_geometry, NULL },
659 { "smart_values", S_IFREG|S_IRUSR, proc_idedisk_read_smart_values, NULL },
660 { "smart_thresholds", S_IFREG|S_IRUSR, proc_idedisk_read_smart_thresholds, NULL },
661 { NULL, 0, NULL, NULL }
662 };
663
664 #else
665
666 #define idedisk_proc NULL
667
668 #endif /* CONFIG_PROC_FS */
669
670 static int set_multcount(ide_drive_t *drive, int arg)
671 {
672 struct request rq;
673
674 if (drive->special.b.set_multmode)
675 return -EBUSY;
676 ide_init_drive_cmd (&rq);
677 drive->mult_req = arg;
678 drive->special.b.set_multmode = 1;
679 (void) ide_do_drive_cmd (drive, &rq, ide_wait);
680 return (drive->mult_count == arg) ? 0 : -EIO;
681 }
682
683 static int set_nowerr(ide_drive_t *drive, int arg)
684 {
685 if (ide_spin_wait_hwgroup(drive))
686 return -EBUSY;
687 drive->nowerr = arg;
688 drive->bad_wstat = arg ? BAD_R_STAT : BAD_W_STAT;
689 spin_unlock_irq(&io_request_lock);
690 return 0;
691 }
692
693 static void idedisk_add_settings(ide_drive_t *drive)
694 {
695 struct hd_driveid *id = drive->id;
696 int major = HWIF(drive)->major;
697 int minor = drive->select.b.unit << PARTN_BITS;
698
699 ide_add_setting(drive, "bios_cyl", SETTING_RW, -1, -1, TYPE_INT, 0, 65535, 1, 1, &drive->bios_cyl, NULL);
700 ide_add_setting(drive, "bios_head", SETTING_RW, -1, -1, TYPE_BYTE, 0, 255, 1, 1, &drive->bios_head, NULL);
701 ide_add_setting(drive, "bios_sect", SETTING_RW, -1, -1, TYPE_BYTE, 0, 63, 1, 1, &drive->bios_sect, NULL);
702 ide_add_setting(drive, "bswap", SETTING_READ, -1, -1, TYPE_BYTE, 0, 1, 1, 1, &drive->bswap, NULL);
703 ide_add_setting(drive, "multcount", id ? SETTING_RW : SETTING_READ, HDIO_GET_MULTCOUNT, HDIO_SET_MULTCOUNT, TYPE_BYTE, 0, id ? id->max_multsect : 0, 1, 2, &drive->mult_count, set_multcount);
704 ide_add_setting(drive, "nowerr", SETTING_RW, HDIO_GET_NOWERR, HDIO_SET_NOWERR, TYPE_BYTE, 0, 1, 1, 1, &drive->nowerr, set_nowerr);
705 ide_add_setting(drive, "breada_readahead", SETTING_RW, BLKRAGET, BLKRASET, TYPE_INT, 0, 255, 1, 2, &read_ahead[major], NULL);
706 ide_add_setting(drive, "file_readahead", SETTING_RW, BLKFRAGET, BLKFRASET, TYPE_INTA, 0, INT_MAX, 1, 1024, &max_readahead[major][minor], NULL);
707 ide_add_setting(drive, "max_kb_per_request", SETTING_RW, BLKSECTGET, BLKSECTSET, TYPE_INTA, 1, 255, 1, 2, &max_sectors[major][minor], NULL);
708 ide_add_setting(drive, "lun", SETTING_RW, -1, -1, TYPE_INT, 0, 7, 1, 1, &drive->lun, NULL);
709 }
710
711 /*
712 * IDE subdriver functions, registered with ide.c
713 */
714 static ide_driver_t idedisk_driver = {
715 "ide-disk", /* name */
716 IDEDISK_VERSION, /* version */
717 ide_disk, /* media */
718 0, /* busy */
719 1, /* supports_dma */
720 0, /* supports_dsc_overlap */
721 NULL, /* cleanup */
722 do_rw_disk, /* do_request */
723 NULL, /* end_request */
724 NULL, /* ioctl */
725 idedisk_open, /* open */
726 idedisk_release, /* release */
727 idedisk_media_change, /* media_change */
728 idedisk_revalidate, /* revalidate */
729 idedisk_pre_reset, /* pre_reset */
730 idedisk_capacity, /* capacity */
731 idedisk_special, /* special */
732 idedisk_proc /* proc */
733 };
734
735 int idedisk_init (void);
736 static ide_module_t idedisk_module = {
737 IDE_DRIVER_MODULE,
738 idedisk_init,
739 &idedisk_driver,
740 NULL
741 };
742
743 static int idedisk_cleanup (ide_drive_t *drive)
744 {
745 return ide_unregister_subdriver(drive);
746 }
747
748 static void idedisk_setup (ide_drive_t *drive)
749 {
750 int i;
751
752 struct hd_driveid *id = drive->id;
753 unsigned long capacity;
754
755 idedisk_add_settings(drive);
756
757 if (id == NULL)
758 return;
759
760 /*
761 * CompactFlash cards and their brethern look just like hard drives
762 * to us, but they are removable and don't have a doorlock mechanism.
763 */
764 if (drive->removable && !drive_is_flashcard(drive)) {
765 /*
766 * Removable disks (eg. SYQUEST); ignore 'WD' drives
767 */
768 if (id->model[0] != 'W' || id->model[1] != 'D') {
769 drive->doorlocking = 1;
770 }
771 }
772 for (i = 0; i < MAX_DRIVES; ++i) {
773 ide_hwif_t *hwif = HWIF(drive);
774
775 if (drive != &hwif->drives[i]) continue;
776 hwif->gd->de_arr[i] = drive->de;
777 if (drive->removable)
778 hwif->gd->flags[i] |= GENHD_FL_REMOVABLE;
779 break;
780 }
781
782 /* Extract geometry if we did not already have one for the drive */
783 if (!drive->cyl || !drive->head || !drive->sect) {
784 drive->cyl = drive->bios_cyl = id->cyls;
785 drive->head = drive->bios_head = id->heads;
786 drive->sect = drive->bios_sect = id->sectors;
787 }
788
789 /* Handle logical geometry translation by the drive */
790 if ((id->field_valid & 1) && id->cur_cyls &&
791 id->cur_heads && (id->cur_heads <= 16) && id->cur_sectors) {
792 drive->cyl = id->cur_cyls;
793 drive->head = id->cur_heads;
794 drive->sect = id->cur_sectors;
795 }
796
797 /* Use physical geometry if what we have still makes no sense */
798 if (drive->head > 16 && id->heads && id->heads <= 16) {
799 drive->cyl = id->cyls;
800 drive->head = id->heads;
801 drive->sect = id->sectors;
802 }
803
804 /* calculate drive capacity, and select LBA if possible */
805 init_idedisk_capacity (drive);
806
807 /*
808 * if possible, give fdisk access to more of the drive,
809 * by correcting bios_cyls:
810 */
811 capacity = idedisk_capacity (drive);
812 if ((capacity >= (drive->bios_cyl * drive->bios_sect * drive->bios_head)) &&
813 (!drive->forced_geom) && drive->bios_sect && drive->bios_head)
814 drive->bios_cyl = (capacity / drive->bios_sect) / drive->bios_head;
815
816 printk (KERN_INFO "%s: %ld sectors", drive->name, capacity);
817
818 /* Give size in megabytes (MB), not mebibytes (MiB). */
819 /* We compute the exact rounded value, avoiding overflow. */
820 printk (" (%ld MB)", (capacity - capacity/625 + 974)/1950);
821
822 /* Only print cache size when it was specified */
823 if (id->buf_size)
824 printk (" w/%dKiB Cache", id->buf_size/2);
825
826 printk(", CHS=%d/%d/%d",
827 drive->bios_cyl, drive->bios_head, drive->bios_sect);
828 #ifdef CONFIG_BLK_DEV_IDEDMA
829 if (drive->using_dma)
830 (void) HWIF(drive)->dmaproc(ide_dma_verbose, drive);
831 #endif /* CONFIG_BLK_DEV_IDEDMA */
832 printk("\n");
833
834 drive->mult_count = 0;
835 if (id->max_multsect) {
836 #ifdef CONFIG_IDEDISK_MULTI_MODE
837 id->multsect = ((id->max_multsect/2) > 1) ? id->max_multsect : 0;
838 id->multsect_valid = id->multsect ? 1 : 0;
839 drive->mult_req = id->multsect_valid ? id->max_multsect : INITIAL_MULT_COUNT;
840 drive->special.b.set_multmode = drive->mult_req ? 1 : 0;
841 #else /* original, pre IDE-NFG, per request of AC */
842 drive->mult_req = INITIAL_MULT_COUNT;
843 if (drive->mult_req > id->max_multsect)
844 drive->mult_req = id->max_multsect;
845 if (drive->mult_req || ((id->multsect_valid & 1) && id->multsect))
846 drive->special.b.set_multmode = 1;
847 #endif
848 }
849 drive->no_io_32bit = id->dword_io ? 1 : 0;
850 }
851
852 int idedisk_init (void)
853 {
854 ide_drive_t *drive;
855 int failed = 0;
856
857 MOD_INC_USE_COUNT;
858 while ((drive = ide_scan_devices (ide_disk, idedisk_driver.name, NULL, failed++)) != NULL) {
859 if (ide_register_subdriver (drive, &idedisk_driver, IDE_SUBDRIVER_VERSION)) {
860 printk (KERN_ERR "ide-disk: %s: Failed to register the driver with ide.c\n", drive->name);
861 continue;
862 }
863 idedisk_setup(drive);
864 if ((!drive->head || drive->head > 16) && !drive->select.b.lba) {
865 printk(KERN_ERR "%s: INVALID GEOMETRY: %d PHYSICAL HEADS?\n", drive->name, drive->head);
866 (void) idedisk_cleanup(drive);
867 continue;
868 }
869 failed--;
870 }
871 ide_register_module(&idedisk_module);
872 MOD_DEC_USE_COUNT;
873 return 0;
874 }
875
876 #ifdef MODULE
877 int init_module (void)
878 {
879 return idedisk_init();
880 }
881
882 void cleanup_module (void)
883 {
884 ide_drive_t *drive;
885 int failed = 0;
886
887 while ((drive = ide_scan_devices (ide_disk, idedisk_driver.name, &idedisk_driver, failed)) != NULL) {
888 if (idedisk_cleanup (drive)) {
889 printk (KERN_ERR "%s: cleanup_module() called while still busy\n", drive->name);
890 failed++;
891 }
892 /* We must remove proc entries defined in this module.
893 Otherwise we oops while accessing these entries */
894 if (drive->proc)
895 ide_remove_proc_entries(drive->proc, idedisk_proc);
896 }
897 ide_unregister_module(&idedisk_module);
898 }
899 #endif /* MODULE */
900
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