2 * linux/drivers/ide/ide-disk.c Version 1.18 Mar 05, 2003
4 * Copyright (C) 1994-1998 Linus Torvalds & authors (see below)
5 * Copyright (C) 1998-2002 Linux ATA Development
6 * Andre Hedrick <andre@linux-ide.org>
7 * Copyright (C) 2003 Red Hat <alan@redhat.com>
11 * Mostly written by Mark Lord <mlord@pobox.com>
12 * and Gadi Oxman <gadio@netvision.net.il>
13 * and Andre Hedrick <andre@linux-ide.org>
15 * This is the IDE/ATA disk driver, as evolved from hd.c and ide.c.
17 * Version 1.00 move disk only code from ide.c to ide-disk.c
18 * support optional byte-swapping of all data
19 * Version 1.01 fix previous byte-swapping code
20 * Version 1.02 remove ", LBA" from drive identification msgs
21 * Version 1.03 fix display of id->buf_size for big-endian
22 * Version 1.04 add /proc configurable settings and S.M.A.R.T support
23 * Version 1.05 add capacity support for ATA3 >= 8GB
24 * Version 1.06 get boot-up messages to show full cyl count
25 * Version 1.07 disable door-locking if it fails
26 * Version 1.08 fixed CHS/LBA translations for ATA4 > 8GB,
27 * process of adding new ATA4 compliance.
28 * fixed problems in allowing fdisk to see
30 * Version 1.09 added increment of rq->sector in ide_multwrite
31 * added UDMA 3/4 reporting
32 * Version 1.10 request queue changes, Ultra DMA 100
33 * Version 1.11 added 48-bit lba
34 * Version 1.12 adding taskfile io access method
35 * Version 1.13 added standby and flush-cache for notifier
36 * Version 1.14 added acoustic-wcache
37 * Version 1.15 convert all calls to ide_raw_taskfile
38 * since args will return register content.
39 * Version 1.16 added suspend-resume-checkpower
40 * Version 1.17 do flush on standby, do flush on ATA < ATA6
44 #define IDEDISK_VERSION "1.18"
48 #include <linux/module.h>
49 #include <linux/types.h>
50 #include <linux/string.h>
51 #include <linux/kernel.h>
52 #include <linux/timer.h>
54 #include <linux/interrupt.h>
55 #include <linux/major.h>
56 #include <linux/errno.h>
57 #include <linux/genhd.h>
58 #include <linux/slab.h>
59 #include <linux/delay.h>
60 #include <linux/mutex.h>
61 #include <linux/leds.h>
65 #include <linux/ide.h>
67 #include <asm/byteorder.h>
69 #include <asm/uaccess.h>
71 #include <asm/div64.h>
78 unsigned int openers; /* protected by BKL for now */
81 static DEFINE_MUTEX(idedisk_ref_mutex);
83 #define to_ide_disk(obj) container_of(obj, struct ide_disk_obj, kref)
85 #define ide_disk_g(disk) \
86 container_of((disk)->private_data, struct ide_disk_obj, driver)
88 static struct ide_disk_obj *ide_disk_get(struct gendisk *disk)
90 struct ide_disk_obj *idkp = NULL;
92 mutex_lock(&idedisk_ref_mutex);
93 idkp = ide_disk_g(disk);
95 kref_get(&idkp->kref);
96 mutex_unlock(&idedisk_ref_mutex);
100 static void ide_disk_release(struct kref *);
102 static void ide_disk_put(struct ide_disk_obj *idkp)
104 mutex_lock(&idedisk_ref_mutex);
105 kref_put(&idkp->kref, ide_disk_release);
106 mutex_unlock(&idedisk_ref_mutex);
110 * lba_capacity_is_ok() performs a sanity check on the claimed "lba_capacity"
111 * value for this drive (from its reported identification information).
113 * Returns: 1 if lba_capacity looks sensible
116 * It is called only once for each drive.
118 static int lba_capacity_is_ok (struct hd_driveid *id)
120 unsigned long lba_sects, chs_sects, head, tail;
122 /* No non-LBA info .. so valid! */
127 * The ATA spec tells large drives to return
128 * C/H/S = 16383/16/63 independent of their size.
129 * Some drives can be jumpered to use 15 heads instead of 16.
130 * Some drives can be jumpered to use 4092 cyls instead of 16383.
132 if ((id->cyls == 16383
133 || (id->cyls == 4092 && id->cur_cyls == 16383)) &&
135 (id->heads == 15 || id->heads == 16) &&
136 (id->lba_capacity >= 16383*63*id->heads))
139 lba_sects = id->lba_capacity;
140 chs_sects = id->cyls * id->heads * id->sectors;
142 /* perform a rough sanity check on lba_sects: within 10% is OK */
143 if ((lba_sects - chs_sects) < chs_sects/10)
146 /* some drives have the word order reversed */
147 head = ((lba_sects >> 16) & 0xffff);
148 tail = (lba_sects & 0xffff);
149 lba_sects = (head | (tail << 16));
150 if ((lba_sects - chs_sects) < chs_sects/10) {
151 id->lba_capacity = lba_sects;
152 return 1; /* lba_capacity is (now) good */
155 return 0; /* lba_capacity value may be bad */
159 * __ide_do_rw_disk() issues READ and WRITE commands to a disk,
160 * using LBA if supported, or CHS otherwise, to address sectors.
162 static ide_startstop_t __ide_do_rw_disk(ide_drive_t *drive, struct request *rq, sector_t block)
164 ide_hwif_t *hwif = HWIF(drive);
165 unsigned int dma = drive->using_dma;
166 u8 lba48 = (drive->addressing == 1) ? 1 : 0;
167 task_ioreg_t command = WIN_NOP;
168 ata_nsector_t nsectors;
170 nsectors.all = (u16) rq->nr_sectors;
172 if (hwif->no_lba48_dma && lba48 && dma) {
173 if (block + rq->nr_sectors > 1ULL << 28)
180 ide_init_sg_cmd(drive, rq);
181 ide_map_sg(drive, rq);
185 hwif->OUTB(drive->ctl, IDE_CONTROL_REG);
187 /* FIXME: SELECT_MASK(drive, 0) ? */
189 if (drive->select.b.lba) {
191 task_ioreg_t tasklets[10];
193 pr_debug("%s: LBA=0x%012llx\n", drive->name,
194 (unsigned long long)block);
198 tasklets[2] = nsectors.b.low;
199 tasklets[3] = nsectors.b.high;
200 tasklets[4] = (task_ioreg_t) block;
201 tasklets[5] = (task_ioreg_t) (block>>8);
202 tasklets[6] = (task_ioreg_t) (block>>16);
203 tasklets[7] = (task_ioreg_t) (block>>24);
204 if (sizeof(block) == 4) {
205 tasklets[8] = (task_ioreg_t) 0;
206 tasklets[9] = (task_ioreg_t) 0;
208 tasklets[8] = (task_ioreg_t)((u64)block >> 32);
209 tasklets[9] = (task_ioreg_t)((u64)block >> 40);
212 printk("%s: 0x%02x%02x 0x%02x%02x%02x%02x%02x%02x\n",
213 drive->name, tasklets[3], tasklets[2],
214 tasklets[9], tasklets[8], tasklets[7],
215 tasklets[6], tasklets[5], tasklets[4]);
217 hwif->OUTB(tasklets[1], IDE_FEATURE_REG);
218 hwif->OUTB(tasklets[3], IDE_NSECTOR_REG);
219 hwif->OUTB(tasklets[7], IDE_SECTOR_REG);
220 hwif->OUTB(tasklets[8], IDE_LCYL_REG);
221 hwif->OUTB(tasklets[9], IDE_HCYL_REG);
223 hwif->OUTB(tasklets[0], IDE_FEATURE_REG);
224 hwif->OUTB(tasklets[2], IDE_NSECTOR_REG);
225 hwif->OUTB(tasklets[4], IDE_SECTOR_REG);
226 hwif->OUTB(tasklets[5], IDE_LCYL_REG);
227 hwif->OUTB(tasklets[6], IDE_HCYL_REG);
228 hwif->OUTB(0x00|drive->select.all,IDE_SELECT_REG);
230 hwif->OUTB(0x00, IDE_FEATURE_REG);
231 hwif->OUTB(nsectors.b.low, IDE_NSECTOR_REG);
232 hwif->OUTB(block, IDE_SECTOR_REG);
233 hwif->OUTB(block>>=8, IDE_LCYL_REG);
234 hwif->OUTB(block>>=8, IDE_HCYL_REG);
235 hwif->OUTB(((block>>8)&0x0f)|drive->select.all,IDE_SELECT_REG);
238 unsigned int sect,head,cyl,track;
239 track = (int)block / drive->sect;
240 sect = (int)block % drive->sect + 1;
241 hwif->OUTB(sect, IDE_SECTOR_REG);
242 head = track % drive->head;
243 cyl = track / drive->head;
245 pr_debug("%s: CHS=%u/%u/%u\n", drive->name, cyl, head, sect);
247 hwif->OUTB(0x00, IDE_FEATURE_REG);
248 hwif->OUTB(nsectors.b.low, IDE_NSECTOR_REG);
249 hwif->OUTB(cyl, IDE_LCYL_REG);
250 hwif->OUTB(cyl>>8, IDE_HCYL_REG);
251 hwif->OUTB(head|drive->select.all,IDE_SELECT_REG);
255 if (!hwif->dma_setup(drive)) {
256 if (rq_data_dir(rq)) {
257 command = lba48 ? WIN_WRITEDMA_EXT : WIN_WRITEDMA;
259 command = lba48 ? WIN_WRITE_EXT: WIN_WRITE;
261 command = lba48 ? WIN_READDMA_EXT : WIN_READDMA;
263 command = lba48 ? WIN_READ_EXT: WIN_READ;
265 hwif->dma_exec_cmd(drive, command);
266 hwif->dma_start(drive);
269 /* fallback to PIO */
270 ide_init_sg_cmd(drive, rq);
273 if (rq_data_dir(rq) == READ) {
275 if (drive->mult_count) {
276 hwif->data_phase = TASKFILE_MULTI_IN;
277 command = lba48 ? WIN_MULTREAD_EXT : WIN_MULTREAD;
279 hwif->data_phase = TASKFILE_IN;
280 command = lba48 ? WIN_READ_EXT : WIN_READ;
283 ide_execute_command(drive, command, &task_in_intr, WAIT_CMD, NULL);
286 if (drive->mult_count) {
287 hwif->data_phase = TASKFILE_MULTI_OUT;
288 command = lba48 ? WIN_MULTWRITE_EXT : WIN_MULTWRITE;
290 hwif->data_phase = TASKFILE_OUT;
291 command = lba48 ? WIN_WRITE_EXT : WIN_WRITE;
294 /* FIXME: ->OUTBSYNC ? */
295 hwif->OUTB(command, IDE_COMMAND_REG);
297 return pre_task_out_intr(drive, rq);
302 * 268435455 == 137439 MB or 28bit limit
303 * 320173056 == 163929 MB or 48bit addressing
304 * 1073741822 == 549756 MB or 48bit addressing fake drive
307 static ide_startstop_t ide_do_rw_disk (ide_drive_t *drive, struct request *rq, sector_t block)
309 ide_hwif_t *hwif = HWIF(drive);
311 BUG_ON(drive->blocked);
313 if (!blk_fs_request(rq)) {
314 blk_dump_rq_flags(rq, "ide_do_rw_disk - bad command");
315 ide_end_request(drive, 0, 0);
319 ledtrig_ide_activity();
321 pr_debug("%s: %sing: block=%llu, sectors=%lu, buffer=0x%08lx\n",
322 drive->name, rq_data_dir(rq) == READ ? "read" : "writ",
323 (unsigned long long)block, rq->nr_sectors,
324 (unsigned long)rq->buffer);
327 hwif->rw_disk(drive, rq);
329 return __ide_do_rw_disk(drive, rq, block);
333 * Queries for true maximum capacity of the drive.
334 * Returns maximum LBA address (> 0) of the drive, 0 if failed.
336 static unsigned long idedisk_read_native_max_address(ide_drive_t *drive)
339 unsigned long addr = 0;
341 /* Create IDE/ATA command request structure */
342 memset(&args, 0, sizeof(ide_task_t));
343 args.tfRegister[IDE_SELECT_OFFSET] = 0x40;
344 args.tfRegister[IDE_COMMAND_OFFSET] = WIN_READ_NATIVE_MAX;
345 args.command_type = IDE_DRIVE_TASK_NO_DATA;
346 args.handler = &task_no_data_intr;
347 /* submit command request */
348 ide_raw_taskfile(drive, &args, NULL);
350 /* if OK, compute maximum address value */
351 if ((args.tfRegister[IDE_STATUS_OFFSET] & 0x01) == 0) {
352 addr = ((args.tfRegister[IDE_SELECT_OFFSET] & 0x0f) << 24)
353 | ((args.tfRegister[ IDE_HCYL_OFFSET] ) << 16)
354 | ((args.tfRegister[ IDE_LCYL_OFFSET] ) << 8)
355 | ((args.tfRegister[IDE_SECTOR_OFFSET] ));
356 addr++; /* since the return value is (maxlba - 1), we add 1 */
361 static unsigned long long idedisk_read_native_max_address_ext(ide_drive_t *drive)
364 unsigned long long addr = 0;
366 /* Create IDE/ATA command request structure */
367 memset(&args, 0, sizeof(ide_task_t));
369 args.tfRegister[IDE_SELECT_OFFSET] = 0x40;
370 args.tfRegister[IDE_COMMAND_OFFSET] = WIN_READ_NATIVE_MAX_EXT;
371 args.command_type = IDE_DRIVE_TASK_NO_DATA;
372 args.handler = &task_no_data_intr;
373 /* submit command request */
374 ide_raw_taskfile(drive, &args, NULL);
376 /* if OK, compute maximum address value */
377 if ((args.tfRegister[IDE_STATUS_OFFSET] & 0x01) == 0) {
378 u32 high = (args.hobRegister[IDE_HCYL_OFFSET] << 16) |
379 (args.hobRegister[IDE_LCYL_OFFSET] << 8) |
380 args.hobRegister[IDE_SECTOR_OFFSET];
381 u32 low = ((args.tfRegister[IDE_HCYL_OFFSET])<<16) |
382 ((args.tfRegister[IDE_LCYL_OFFSET])<<8) |
383 (args.tfRegister[IDE_SECTOR_OFFSET]);
384 addr = ((__u64)high << 24) | low;
385 addr++; /* since the return value is (maxlba - 1), we add 1 */
391 * Sets maximum virtual LBA address of the drive.
392 * Returns new maximum virtual LBA address (> 0) or 0 on failure.
394 static unsigned long idedisk_set_max_address(ide_drive_t *drive, unsigned long addr_req)
397 unsigned long addr_set = 0;
400 /* Create IDE/ATA command request structure */
401 memset(&args, 0, sizeof(ide_task_t));
402 args.tfRegister[IDE_SECTOR_OFFSET] = ((addr_req >> 0) & 0xff);
403 args.tfRegister[IDE_LCYL_OFFSET] = ((addr_req >> 8) & 0xff);
404 args.tfRegister[IDE_HCYL_OFFSET] = ((addr_req >> 16) & 0xff);
405 args.tfRegister[IDE_SELECT_OFFSET] = ((addr_req >> 24) & 0x0f) | 0x40;
406 args.tfRegister[IDE_COMMAND_OFFSET] = WIN_SET_MAX;
407 args.command_type = IDE_DRIVE_TASK_NO_DATA;
408 args.handler = &task_no_data_intr;
409 /* submit command request */
410 ide_raw_taskfile(drive, &args, NULL);
411 /* if OK, read new maximum address value */
412 if ((args.tfRegister[IDE_STATUS_OFFSET] & 0x01) == 0) {
413 addr_set = ((args.tfRegister[IDE_SELECT_OFFSET] & 0x0f) << 24)
414 | ((args.tfRegister[ IDE_HCYL_OFFSET] ) << 16)
415 | ((args.tfRegister[ IDE_LCYL_OFFSET] ) << 8)
416 | ((args.tfRegister[IDE_SECTOR_OFFSET] ));
422 static unsigned long long idedisk_set_max_address_ext(ide_drive_t *drive, unsigned long long addr_req)
425 unsigned long long addr_set = 0;
428 /* Create IDE/ATA command request structure */
429 memset(&args, 0, sizeof(ide_task_t));
430 args.tfRegister[IDE_SECTOR_OFFSET] = ((addr_req >> 0) & 0xff);
431 args.tfRegister[IDE_LCYL_OFFSET] = ((addr_req >>= 8) & 0xff);
432 args.tfRegister[IDE_HCYL_OFFSET] = ((addr_req >>= 8) & 0xff);
433 args.tfRegister[IDE_SELECT_OFFSET] = 0x40;
434 args.tfRegister[IDE_COMMAND_OFFSET] = WIN_SET_MAX_EXT;
435 args.hobRegister[IDE_SECTOR_OFFSET] = (addr_req >>= 8) & 0xff;
436 args.hobRegister[IDE_LCYL_OFFSET] = (addr_req >>= 8) & 0xff;
437 args.hobRegister[IDE_HCYL_OFFSET] = (addr_req >>= 8) & 0xff;
438 args.hobRegister[IDE_SELECT_OFFSET] = 0x40;
439 args.hobRegister[IDE_CONTROL_OFFSET_HOB]= (drive->ctl|0x80);
440 args.command_type = IDE_DRIVE_TASK_NO_DATA;
441 args.handler = &task_no_data_intr;
442 /* submit command request */
443 ide_raw_taskfile(drive, &args, NULL);
444 /* if OK, compute maximum address value */
445 if ((args.tfRegister[IDE_STATUS_OFFSET] & 0x01) == 0) {
446 u32 high = (args.hobRegister[IDE_HCYL_OFFSET] << 16) |
447 (args.hobRegister[IDE_LCYL_OFFSET] << 8) |
448 args.hobRegister[IDE_SECTOR_OFFSET];
449 u32 low = ((args.tfRegister[IDE_HCYL_OFFSET])<<16) |
450 ((args.tfRegister[IDE_LCYL_OFFSET])<<8) |
451 (args.tfRegister[IDE_SECTOR_OFFSET]);
452 addr_set = ((__u64)high << 24) | low;
458 static unsigned long long sectors_to_MB(unsigned long long n)
460 n <<= 9; /* make it bytes */
461 do_div(n, 1000000); /* make it MB */
466 * Bits 10 of command_set_1 and cfs_enable_1 must be equal,
467 * so on non-buggy drives we need test only one.
468 * However, we should also check whether these fields are valid.
470 static inline int idedisk_supports_hpa(const struct hd_driveid *id)
472 return (id->command_set_1 & 0x0400) && (id->cfs_enable_1 & 0x0400);
478 static inline int idedisk_supports_lba48(const struct hd_driveid *id)
480 return (id->command_set_2 & 0x0400) && (id->cfs_enable_2 & 0x0400)
481 && id->lba_capacity_2;
485 * Some disks report total number of sectors instead of
486 * maximum sector address. We list them here.
488 static const struct drive_list_entry hpa_list[] = {
489 { "ST340823A", NULL },
493 static void idedisk_check_hpa(ide_drive_t *drive)
495 unsigned long long capacity, set_max;
496 int lba48 = idedisk_supports_lba48(drive->id);
498 capacity = drive->capacity64;
500 set_max = idedisk_read_native_max_address_ext(drive);
502 set_max = idedisk_read_native_max_address(drive);
504 if (ide_in_drive_list(drive->id, hpa_list)) {
506 * Since we are inclusive wrt to firmware revisions do this
507 * extra check and apply the workaround only when needed.
509 if (set_max == capacity + 1)
513 if (set_max <= capacity)
516 printk(KERN_INFO "%s: Host Protected Area detected.\n"
517 "\tcurrent capacity is %llu sectors (%llu MB)\n"
518 "\tnative capacity is %llu sectors (%llu MB)\n",
520 capacity, sectors_to_MB(capacity),
521 set_max, sectors_to_MB(set_max));
524 set_max = idedisk_set_max_address_ext(drive, set_max);
526 set_max = idedisk_set_max_address(drive, set_max);
528 drive->capacity64 = set_max;
529 printk(KERN_INFO "%s: Host Protected Area disabled.\n",
535 * Compute drive->capacity, the full capacity of the drive
536 * Called with drive->id != NULL.
538 * To compute capacity, this uses either of
540 * 1. CHS value set by user (whatever user sets will be trusted)
541 * 2. LBA value from target drive (require new ATA feature)
542 * 3. LBA value from system BIOS (new one is OK, old one may break)
543 * 4. CHS value from system BIOS (traditional style)
545 * in above order (i.e., if value of higher priority is available,
546 * reset will be ignored).
548 static void init_idedisk_capacity (ide_drive_t *drive)
550 struct hd_driveid *id = drive->id;
552 * If this drive supports the Host Protected Area feature set,
553 * then we may need to change our opinion about the drive's capacity.
555 int hpa = idedisk_supports_hpa(id);
557 if (idedisk_supports_lba48(id)) {
558 /* drive speaks 48-bit LBA */
559 drive->select.b.lba = 1;
560 drive->capacity64 = id->lba_capacity_2;
562 idedisk_check_hpa(drive);
563 } else if ((id->capability & 2) && lba_capacity_is_ok(id)) {
564 /* drive speaks 28-bit LBA */
565 drive->select.b.lba = 1;
566 drive->capacity64 = id->lba_capacity;
568 idedisk_check_hpa(drive);
570 /* drive speaks boring old 28-bit CHS */
571 drive->capacity64 = drive->cyl * drive->head * drive->sect;
575 static sector_t idedisk_capacity (ide_drive_t *drive)
577 return drive->capacity64 - drive->sect0;
580 #ifdef CONFIG_IDE_PROC_FS
581 static int smart_enable(ide_drive_t *drive)
585 memset(&args, 0, sizeof(ide_task_t));
586 args.tfRegister[IDE_FEATURE_OFFSET] = SMART_ENABLE;
587 args.tfRegister[IDE_LCYL_OFFSET] = SMART_LCYL_PASS;
588 args.tfRegister[IDE_HCYL_OFFSET] = SMART_HCYL_PASS;
589 args.tfRegister[IDE_COMMAND_OFFSET] = WIN_SMART;
590 args.command_type = IDE_DRIVE_TASK_NO_DATA;
591 args.handler = &task_no_data_intr;
592 return ide_raw_taskfile(drive, &args, NULL);
595 static int get_smart_values(ide_drive_t *drive, u8 *buf)
599 memset(&args, 0, sizeof(ide_task_t));
600 args.tfRegister[IDE_FEATURE_OFFSET] = SMART_READ_VALUES;
601 args.tfRegister[IDE_NSECTOR_OFFSET] = 0x01;
602 args.tfRegister[IDE_LCYL_OFFSET] = SMART_LCYL_PASS;
603 args.tfRegister[IDE_HCYL_OFFSET] = SMART_HCYL_PASS;
604 args.tfRegister[IDE_COMMAND_OFFSET] = WIN_SMART;
605 args.command_type = IDE_DRIVE_TASK_IN;
606 args.data_phase = TASKFILE_IN;
607 args.handler = &task_in_intr;
608 (void) smart_enable(drive);
609 return ide_raw_taskfile(drive, &args, buf);
612 static int get_smart_thresholds(ide_drive_t *drive, u8 *buf)
615 memset(&args, 0, sizeof(ide_task_t));
616 args.tfRegister[IDE_FEATURE_OFFSET] = SMART_READ_THRESHOLDS;
617 args.tfRegister[IDE_NSECTOR_OFFSET] = 0x01;
618 args.tfRegister[IDE_LCYL_OFFSET] = SMART_LCYL_PASS;
619 args.tfRegister[IDE_HCYL_OFFSET] = SMART_HCYL_PASS;
620 args.tfRegister[IDE_COMMAND_OFFSET] = WIN_SMART;
621 args.command_type = IDE_DRIVE_TASK_IN;
622 args.data_phase = TASKFILE_IN;
623 args.handler = &task_in_intr;
624 (void) smart_enable(drive);
625 return ide_raw_taskfile(drive, &args, buf);
628 static int proc_idedisk_read_cache
629 (char *page, char **start, off_t off, int count, int *eof, void *data)
631 ide_drive_t *drive = (ide_drive_t *) data;
636 len = sprintf(out,"%i\n", drive->id->buf_size / 2);
638 len = sprintf(out,"(none)\n");
639 PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
642 static int proc_idedisk_read_capacity
643 (char *page, char **start, off_t off, int count, int *eof, void *data)
645 ide_drive_t*drive = (ide_drive_t *)data;
648 len = sprintf(page,"%llu\n", (long long)idedisk_capacity(drive));
649 PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
652 static int proc_idedisk_read_smart_thresholds
653 (char *page, char **start, off_t off, int count, int *eof, void *data)
655 ide_drive_t *drive = (ide_drive_t *)data;
658 if (!get_smart_thresholds(drive, page)) {
659 unsigned short *val = (unsigned short *) page;
660 char *out = ((char *)val) + (SECTOR_WORDS * 4);
663 out += sprintf(out, "%04x%c", le16_to_cpu(*val), (++i & 7) ? ' ' : '\n');
665 } while (i < (SECTOR_WORDS * 2));
668 PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
671 static int proc_idedisk_read_smart_values
672 (char *page, char **start, off_t off, int count, int *eof, void *data)
674 ide_drive_t *drive = (ide_drive_t *)data;
677 if (!get_smart_values(drive, page)) {
678 unsigned short *val = (unsigned short *) page;
679 char *out = ((char *)val) + (SECTOR_WORDS * 4);
682 out += sprintf(out, "%04x%c", le16_to_cpu(*val), (++i & 7) ? ' ' : '\n');
684 } while (i < (SECTOR_WORDS * 2));
687 PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
690 static ide_proc_entry_t idedisk_proc[] = {
691 { "cache", S_IFREG|S_IRUGO, proc_idedisk_read_cache, NULL },
692 { "capacity", S_IFREG|S_IRUGO, proc_idedisk_read_capacity, NULL },
693 { "geometry", S_IFREG|S_IRUGO, proc_ide_read_geometry, NULL },
694 { "smart_values", S_IFREG|S_IRUSR, proc_idedisk_read_smart_values, NULL },
695 { "smart_thresholds", S_IFREG|S_IRUSR, proc_idedisk_read_smart_thresholds, NULL },
696 { NULL, 0, NULL, NULL }
698 #endif /* CONFIG_IDE_PROC_FS */
700 static void idedisk_prepare_flush(struct request_queue *q, struct request *rq)
702 ide_drive_t *drive = q->queuedata;
704 memset(rq->cmd, 0, sizeof(rq->cmd));
706 if (ide_id_has_flush_cache_ext(drive->id) &&
707 (drive->capacity64 >= (1UL << 28)))
708 rq->cmd[0] = WIN_FLUSH_CACHE_EXT;
710 rq->cmd[0] = WIN_FLUSH_CACHE;
713 rq->cmd_type = REQ_TYPE_ATA_TASK;
714 rq->cmd_flags |= REQ_SOFTBARRIER;
715 rq->buffer = rq->cmd;
718 static int idedisk_issue_flush(struct request_queue *q, struct gendisk *disk,
719 sector_t *error_sector)
721 ide_drive_t *drive = q->queuedata;
728 rq = blk_get_request(q, WRITE, __GFP_WAIT);
730 idedisk_prepare_flush(q, rq);
732 ret = blk_execute_rq(q, disk, rq, 0);
735 * if we failed and caller wants error offset, get it
737 if (ret && error_sector)
738 *error_sector = ide_get_error_location(drive, rq->cmd);
745 * This is tightly woven into the driver->do_special can not touch.
746 * DON'T do it again until a total personality rewrite is committed.
748 static int set_multcount(ide_drive_t *drive, int arg)
752 if (arg < 0 || arg > drive->id->max_multsect)
755 if (drive->special.b.set_multmode)
757 ide_init_drive_cmd (&rq);
758 rq.cmd_type = REQ_TYPE_ATA_CMD;
759 drive->mult_req = arg;
760 drive->special.b.set_multmode = 1;
761 (void) ide_do_drive_cmd (drive, &rq, ide_wait);
762 return (drive->mult_count == arg) ? 0 : -EIO;
765 static int set_nowerr(ide_drive_t *drive, int arg)
767 if (arg < 0 || arg > 1)
770 if (ide_spin_wait_hwgroup(drive))
773 drive->bad_wstat = arg ? BAD_R_STAT : BAD_W_STAT;
774 spin_unlock_irq(&ide_lock);
778 static void update_ordered(ide_drive_t *drive)
780 struct hd_driveid *id = drive->id;
781 unsigned ordered = QUEUE_ORDERED_NONE;
782 prepare_flush_fn *prep_fn = NULL;
783 issue_flush_fn *issue_fn = NULL;
786 unsigned long long capacity;
789 * We must avoid issuing commands a drive does not
790 * understand or we may crash it. We check flush cache
791 * is supported. We also check we have the LBA48 flush
792 * cache if the drive capacity is too large. By this
793 * time we have trimmed the drive capacity if LBA48 is
794 * not available so we don't need to recheck that.
796 capacity = idedisk_capacity(drive);
797 barrier = ide_id_has_flush_cache(id) && !drive->noflush &&
798 (drive->addressing == 0 || capacity <= (1ULL << 28) ||
799 ide_id_has_flush_cache_ext(id));
801 printk(KERN_INFO "%s: cache flushes %ssupported\n",
802 drive->name, barrier ? "" : "not ");
805 ordered = QUEUE_ORDERED_DRAIN_FLUSH;
806 prep_fn = idedisk_prepare_flush;
807 issue_fn = idedisk_issue_flush;
810 ordered = QUEUE_ORDERED_DRAIN;
812 blk_queue_ordered(drive->queue, ordered, prep_fn);
813 blk_queue_issue_flush_fn(drive->queue, issue_fn);
816 static int write_cache(ide_drive_t *drive, int arg)
821 if (arg < 0 || arg > 1)
824 if (ide_id_has_flush_cache(drive->id)) {
825 memset(&args, 0, sizeof(ide_task_t));
826 args.tfRegister[IDE_FEATURE_OFFSET] = (arg) ?
827 SETFEATURES_EN_WCACHE : SETFEATURES_DIS_WCACHE;
828 args.tfRegister[IDE_COMMAND_OFFSET] = WIN_SETFEATURES;
829 args.command_type = IDE_DRIVE_TASK_NO_DATA;
830 args.handler = &task_no_data_intr;
831 err = ide_raw_taskfile(drive, &args, NULL);
836 update_ordered(drive);
841 static int do_idedisk_flushcache (ide_drive_t *drive)
845 memset(&args, 0, sizeof(ide_task_t));
846 if (ide_id_has_flush_cache_ext(drive->id))
847 args.tfRegister[IDE_COMMAND_OFFSET] = WIN_FLUSH_CACHE_EXT;
849 args.tfRegister[IDE_COMMAND_OFFSET] = WIN_FLUSH_CACHE;
850 args.command_type = IDE_DRIVE_TASK_NO_DATA;
851 args.handler = &task_no_data_intr;
852 return ide_raw_taskfile(drive, &args, NULL);
855 static int set_acoustic (ide_drive_t *drive, int arg)
859 if (arg < 0 || arg > 254)
862 memset(&args, 0, sizeof(ide_task_t));
863 args.tfRegister[IDE_FEATURE_OFFSET] = (arg) ? SETFEATURES_EN_AAM :
865 args.tfRegister[IDE_NSECTOR_OFFSET] = arg;
866 args.tfRegister[IDE_COMMAND_OFFSET] = WIN_SETFEATURES;
867 args.command_type = IDE_DRIVE_TASK_NO_DATA;
868 args.handler = &task_no_data_intr;
869 ide_raw_taskfile(drive, &args, NULL);
870 drive->acoustic = arg;
878 * 2: 48-bit capable doing 28-bit
880 static int set_lba_addressing(ide_drive_t *drive, int arg)
882 if (arg < 0 || arg > 2)
885 drive->addressing = 0;
887 if (HWIF(drive)->no_lba48)
890 if (!idedisk_supports_lba48(drive->id))
892 drive->addressing = arg;
896 #ifdef CONFIG_IDE_PROC_FS
897 static void idedisk_add_settings(ide_drive_t *drive)
899 struct hd_driveid *id = drive->id;
901 ide_add_setting(drive, "bios_cyl", SETTING_RW, TYPE_INT, 0, 65535, 1, 1, &drive->bios_cyl, NULL);
902 ide_add_setting(drive, "bios_head", SETTING_RW, TYPE_BYTE, 0, 255, 1, 1, &drive->bios_head, NULL);
903 ide_add_setting(drive, "bios_sect", SETTING_RW, TYPE_BYTE, 0, 63, 1, 1, &drive->bios_sect, NULL);
904 ide_add_setting(drive, "address", SETTING_RW, TYPE_BYTE, 0, 2, 1, 1, &drive->addressing, set_lba_addressing);
905 ide_add_setting(drive, "bswap", SETTING_READ, TYPE_BYTE, 0, 1, 1, 1, &drive->bswap, NULL);
906 ide_add_setting(drive, "multcount", SETTING_RW, TYPE_BYTE, 0, id->max_multsect, 1, 1, &drive->mult_count, set_multcount);
907 ide_add_setting(drive, "nowerr", SETTING_RW, TYPE_BYTE, 0, 1, 1, 1, &drive->nowerr, set_nowerr);
908 ide_add_setting(drive, "lun", SETTING_RW, TYPE_INT, 0, 7, 1, 1, &drive->lun, NULL);
909 ide_add_setting(drive, "wcache", SETTING_RW, TYPE_BYTE, 0, 1, 1, 1, &drive->wcache, write_cache);
910 ide_add_setting(drive, "acoustic", SETTING_RW, TYPE_BYTE, 0, 254, 1, 1, &drive->acoustic, set_acoustic);
911 ide_add_setting(drive, "failures", SETTING_RW, TYPE_INT, 0, 65535, 1, 1, &drive->failures, NULL);
912 ide_add_setting(drive, "max_failures", SETTING_RW, TYPE_INT, 0, 65535, 1, 1, &drive->max_failures, NULL);
915 static inline void idedisk_add_settings(ide_drive_t *drive) { ; }
918 static void idedisk_setup (ide_drive_t *drive)
920 struct hd_driveid *id = drive->id;
921 unsigned long long capacity;
923 idedisk_add_settings(drive);
925 if (drive->id_read == 0)
928 if (drive->removable) {
930 * Removable disks (eg. SYQUEST); ignore 'WD' drives
932 if (id->model[0] != 'W' || id->model[1] != 'D') {
933 drive->doorlocking = 1;
937 (void)set_lba_addressing(drive, 1);
939 if (drive->addressing == 1) {
940 ide_hwif_t *hwif = HWIF(drive);
943 if (max_s > hwif->rqsize)
944 max_s = hwif->rqsize;
946 blk_queue_max_sectors(drive->queue, max_s);
949 printk(KERN_INFO "%s: max request size: %dKiB\n", drive->name, drive->queue->max_sectors / 2);
951 /* calculate drive capacity, and select LBA if possible */
952 init_idedisk_capacity (drive);
954 /* limit drive capacity to 137GB if LBA48 cannot be used */
955 if (drive->addressing == 0 && drive->capacity64 > 1ULL << 28) {
956 printk(KERN_WARNING "%s: cannot use LBA48 - full capacity "
957 "%llu sectors (%llu MB)\n",
958 drive->name, (unsigned long long)drive->capacity64,
959 sectors_to_MB(drive->capacity64));
960 drive->capacity64 = 1ULL << 28;
963 if (drive->hwif->no_lba48_dma && drive->addressing) {
964 if (drive->capacity64 > 1ULL << 28) {
965 printk(KERN_INFO "%s: cannot use LBA48 DMA - PIO mode will"
966 " be used for accessing sectors > %u\n",
967 drive->name, 1 << 28);
969 drive->addressing = 0;
973 * if possible, give fdisk access to more of the drive,
974 * by correcting bios_cyls:
976 capacity = idedisk_capacity (drive);
977 if (!drive->forced_geom) {
979 if (idedisk_supports_lba48(drive->id)) {
981 drive->bios_sect = 63;
982 drive->bios_head = 255;
985 if (drive->bios_sect && drive->bios_head) {
986 unsigned int cap0 = capacity; /* truncate to 32 bits */
987 unsigned int cylsz, cyl;
989 if (cap0 != capacity)
990 drive->bios_cyl = 65535;
992 cylsz = drive->bios_sect * drive->bios_head;
996 if (cyl > drive->bios_cyl)
997 drive->bios_cyl = cyl;
1001 printk(KERN_INFO "%s: %llu sectors (%llu MB)",
1002 drive->name, capacity, sectors_to_MB(capacity));
1004 /* Only print cache size when it was specified */
1006 printk (" w/%dKiB Cache", id->buf_size/2);
1008 printk(", CHS=%d/%d/%d",
1009 drive->bios_cyl, drive->bios_head, drive->bios_sect);
1010 if (drive->using_dma)
1011 ide_dma_verbose(drive);
1014 /* write cache enabled? */
1015 if ((id->csfo & 1) || (id->cfs_enable_1 & (1 << 5)))
1018 write_cache(drive, 1);
1021 static void ide_cacheflush_p(ide_drive_t *drive)
1023 if (!drive->wcache || !ide_id_has_flush_cache(drive->id))
1026 if (do_idedisk_flushcache(drive))
1027 printk(KERN_INFO "%s: wcache flush failed!\n", drive->name);
1030 static void ide_disk_remove(ide_drive_t *drive)
1032 struct ide_disk_obj *idkp = drive->driver_data;
1033 struct gendisk *g = idkp->disk;
1035 ide_proc_unregister_driver(drive, idkp->driver);
1039 ide_cacheflush_p(drive);
1044 static void ide_disk_release(struct kref *kref)
1046 struct ide_disk_obj *idkp = to_ide_disk(kref);
1047 ide_drive_t *drive = idkp->drive;
1048 struct gendisk *g = idkp->disk;
1050 drive->driver_data = NULL;
1051 g->private_data = NULL;
1056 static int ide_disk_probe(ide_drive_t *drive);
1059 * On HPA drives the capacity needs to be
1060 * reinitilized on resume otherwise the disk
1061 * can not be used and a hard reset is required
1063 static void ide_disk_resume(ide_drive_t *drive)
1065 if (idedisk_supports_hpa(drive->id))
1066 init_idedisk_capacity(drive);
1069 static void ide_device_shutdown(ide_drive_t *drive)
1072 /* On Alpha, halt(8) doesn't actually turn the machine off,
1073 it puts you into the sort of firmware monitor. Typically,
1074 it's used to boot another kernel image, so it's not much
1075 different from reboot(8). Therefore, we don't need to
1076 spin down the disk in this case, especially since Alpha
1077 firmware doesn't handle disks in standby mode properly.
1078 On the other hand, it's reasonably safe to turn the power
1079 off when the shutdown process reaches the firmware prompt,
1080 as the firmware initialization takes rather long time -
1081 at least 10 seconds, which should be sufficient for
1082 the disk to expire its write cache. */
1083 if (system_state != SYSTEM_POWER_OFF) {
1085 if (system_state == SYSTEM_RESTART) {
1087 ide_cacheflush_p(drive);
1091 printk("Shutdown: %s\n", drive->name);
1092 drive->gendev.bus->suspend(&drive->gendev, PMSG_SUSPEND);
1095 static ide_driver_t idedisk_driver = {
1097 .owner = THIS_MODULE,
1099 .bus = &ide_bus_type,
1101 .probe = ide_disk_probe,
1102 .remove = ide_disk_remove,
1103 .resume = ide_disk_resume,
1104 .shutdown = ide_device_shutdown,
1105 .version = IDEDISK_VERSION,
1107 .supports_dsc_overlap = 0,
1108 .do_request = ide_do_rw_disk,
1109 .end_request = ide_end_request,
1110 .error = __ide_error,
1111 .abort = __ide_abort,
1112 #ifdef CONFIG_IDE_PROC_FS
1113 .proc = idedisk_proc,
1117 static int idedisk_open(struct inode *inode, struct file *filp)
1119 struct gendisk *disk = inode->i_bdev->bd_disk;
1120 struct ide_disk_obj *idkp;
1123 if (!(idkp = ide_disk_get(disk)))
1126 drive = idkp->drive;
1130 if (drive->removable && idkp->openers == 1) {
1132 memset(&args, 0, sizeof(ide_task_t));
1133 args.tfRegister[IDE_COMMAND_OFFSET] = WIN_DOORLOCK;
1134 args.command_type = IDE_DRIVE_TASK_NO_DATA;
1135 args.handler = &task_no_data_intr;
1136 check_disk_change(inode->i_bdev);
1138 * Ignore the return code from door_lock,
1139 * since the open() has already succeeded,
1140 * and the door_lock is irrelevant at this point.
1142 if (drive->doorlocking && ide_raw_taskfile(drive, &args, NULL))
1143 drive->doorlocking = 0;
1148 static int idedisk_release(struct inode *inode, struct file *filp)
1150 struct gendisk *disk = inode->i_bdev->bd_disk;
1151 struct ide_disk_obj *idkp = ide_disk_g(disk);
1152 ide_drive_t *drive = idkp->drive;
1154 if (idkp->openers == 1)
1155 ide_cacheflush_p(drive);
1157 if (drive->removable && idkp->openers == 1) {
1159 memset(&args, 0, sizeof(ide_task_t));
1160 args.tfRegister[IDE_COMMAND_OFFSET] = WIN_DOORUNLOCK;
1161 args.command_type = IDE_DRIVE_TASK_NO_DATA;
1162 args.handler = &task_no_data_intr;
1163 if (drive->doorlocking && ide_raw_taskfile(drive, &args, NULL))
1164 drive->doorlocking = 0;
1174 static int idedisk_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1176 struct ide_disk_obj *idkp = ide_disk_g(bdev->bd_disk);
1177 ide_drive_t *drive = idkp->drive;
1179 geo->heads = drive->bios_head;
1180 geo->sectors = drive->bios_sect;
1181 geo->cylinders = (u16)drive->bios_cyl; /* truncate */
1185 static int idedisk_ioctl(struct inode *inode, struct file *file,
1186 unsigned int cmd, unsigned long arg)
1188 unsigned long flags;
1189 struct block_device *bdev = inode->i_bdev;
1190 struct ide_disk_obj *idkp = ide_disk_g(bdev->bd_disk);
1191 ide_drive_t *drive = idkp->drive;
1192 int err, (*setfunc)(ide_drive_t *, int);
1196 case HDIO_GET_ADDRESS: val = &drive->addressing; goto read_val;
1197 case HDIO_GET_MULTCOUNT: val = &drive->mult_count; goto read_val;
1198 case HDIO_GET_NOWERR: val = &drive->nowerr; goto read_val;
1199 case HDIO_GET_WCACHE: val = &drive->wcache; goto read_val;
1200 case HDIO_GET_ACOUSTIC: val = &drive->acoustic; goto read_val;
1201 case HDIO_SET_ADDRESS: setfunc = set_lba_addressing; goto set_val;
1202 case HDIO_SET_MULTCOUNT: setfunc = set_multcount; goto set_val;
1203 case HDIO_SET_NOWERR: setfunc = set_nowerr; goto set_val;
1204 case HDIO_SET_WCACHE: setfunc = write_cache; goto set_val;
1205 case HDIO_SET_ACOUSTIC: setfunc = set_acoustic; goto set_val;
1208 return generic_ide_ioctl(drive, file, bdev, cmd, arg);
1211 mutex_lock(&ide_setting_mtx);
1212 spin_lock_irqsave(&ide_lock, flags);
1214 spin_unlock_irqrestore(&ide_lock, flags);
1215 mutex_unlock(&ide_setting_mtx);
1216 return err >= 0 ? put_user(err, (long __user *)arg) : err;
1219 if (bdev != bdev->bd_contains)
1222 if (!capable(CAP_SYS_ADMIN))
1225 mutex_lock(&ide_setting_mtx);
1226 err = setfunc(drive, arg);
1227 mutex_unlock(&ide_setting_mtx);
1233 static int idedisk_media_changed(struct gendisk *disk)
1235 struct ide_disk_obj *idkp = ide_disk_g(disk);
1236 ide_drive_t *drive = idkp->drive;
1238 /* do not scan partitions twice if this is a removable device */
1239 if (drive->attach) {
1243 /* if removable, always assume it was changed */
1244 return drive->removable;
1247 static int idedisk_revalidate_disk(struct gendisk *disk)
1249 struct ide_disk_obj *idkp = ide_disk_g(disk);
1250 set_capacity(disk, idedisk_capacity(idkp->drive));
1254 static struct block_device_operations idedisk_ops = {
1255 .owner = THIS_MODULE,
1256 .open = idedisk_open,
1257 .release = idedisk_release,
1258 .ioctl = idedisk_ioctl,
1259 .getgeo = idedisk_getgeo,
1260 .media_changed = idedisk_media_changed,
1261 .revalidate_disk= idedisk_revalidate_disk
1264 MODULE_DESCRIPTION("ATA DISK Driver");
1266 static int ide_disk_probe(ide_drive_t *drive)
1268 struct ide_disk_obj *idkp;
1271 /* strstr("foo", "") is non-NULL */
1272 if (!strstr("ide-disk", drive->driver_req))
1274 if (!drive->present)
1276 if (drive->media != ide_disk)
1279 idkp = kzalloc(sizeof(*idkp), GFP_KERNEL);
1283 g = alloc_disk_node(1 << PARTN_BITS,
1284 hwif_to_node(drive->hwif));
1288 ide_init_disk(g, drive);
1290 ide_proc_register_driver(drive, &idedisk_driver);
1292 kref_init(&idkp->kref);
1294 idkp->drive = drive;
1295 idkp->driver = &idedisk_driver;
1298 g->private_data = &idkp->driver;
1300 drive->driver_data = idkp;
1302 idedisk_setup(drive);
1303 if ((!drive->head || drive->head > 16) && !drive->select.b.lba) {
1304 printk(KERN_ERR "%s: INVALID GEOMETRY: %d PHYSICAL HEADS?\n",
1305 drive->name, drive->head);
1310 g->minors = 1 << PARTN_BITS;
1311 g->driverfs_dev = &drive->gendev;
1312 g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0;
1313 set_capacity(g, idedisk_capacity(drive));
1314 g->fops = &idedisk_ops;
1324 static void __exit idedisk_exit (void)
1326 driver_unregister(&idedisk_driver.gen_driver);
1329 static int __init idedisk_init(void)
1331 return driver_register(&idedisk_driver.gen_driver);
1334 MODULE_ALIAS("ide:*m-disk*");
1335 module_init(idedisk_init);
1336 module_exit(idedisk_exit);
1337 MODULE_LICENSE("GPL");