2 * Copyright (C) 1994-1998 Linus Torvalds & authors (see below)
3 * Copyright (C) 1998-2002 Linux ATA Development
4 * Andre Hedrick <andre@linux-ide.org>
5 * Copyright (C) 2003 Red Hat <alan@redhat.com>
6 * Copyright (C) 2003-2005, 2007 Bartlomiej Zolnierkiewicz
10 * Mostly written by Mark Lord <mlord@pobox.com>
11 * and Gadi Oxman <gadio@netvision.net.il>
12 * and Andre Hedrick <andre@linux-ide.org>
14 * This is the IDE/ATA disk driver, as evolved from hd.c and ide.c.
17 #define IDEDISK_VERSION "1.18"
19 #include <linux/module.h>
20 #include <linux/types.h>
21 #include <linux/string.h>
22 #include <linux/kernel.h>
23 #include <linux/timer.h>
25 #include <linux/interrupt.h>
26 #include <linux/major.h>
27 #include <linux/errno.h>
28 #include <linux/genhd.h>
29 #include <linux/slab.h>
30 #include <linux/delay.h>
31 #include <linux/mutex.h>
32 #include <linux/leds.h>
33 #include <linux/ide.h>
34 #include <linux/hdreg.h>
36 #include <asm/byteorder.h>
38 #include <asm/uaccess.h>
40 #include <asm/div64.h>
42 #if !defined(CONFIG_DEBUG_BLOCK_EXT_DEVT)
43 #define IDE_DISK_MINORS (1 << PARTN_BITS)
45 #define IDE_DISK_MINORS 0
53 unsigned int openers; /* protected by BKL for now */
56 static DEFINE_MUTEX(idedisk_ref_mutex);
58 #define to_ide_disk(obj) container_of(obj, struct ide_disk_obj, kref)
60 #define ide_disk_g(disk) \
61 container_of((disk)->private_data, struct ide_disk_obj, driver)
63 static void ide_disk_release(struct kref *);
65 static struct ide_disk_obj *ide_disk_get(struct gendisk *disk)
67 struct ide_disk_obj *idkp = NULL;
69 mutex_lock(&idedisk_ref_mutex);
70 idkp = ide_disk_g(disk);
72 if (ide_device_get(idkp->drive))
75 kref_get(&idkp->kref);
77 mutex_unlock(&idedisk_ref_mutex);
81 static void ide_disk_put(struct ide_disk_obj *idkp)
83 ide_drive_t *drive = idkp->drive;
85 mutex_lock(&idedisk_ref_mutex);
86 kref_put(&idkp->kref, ide_disk_release);
87 ide_device_put(drive);
88 mutex_unlock(&idedisk_ref_mutex);
91 static const u8 ide_rw_cmds[] = {
94 ATA_CMD_READ_MULTI_EXT,
95 ATA_CMD_WRITE_MULTI_EXT,
99 ATA_CMD_PIO_WRITE_EXT,
106 static const u8 ide_data_phases[] = {
115 static void ide_tf_set_cmd(ide_drive_t *drive, ide_task_t *task, u8 dma)
117 u8 index, lba48, write;
119 lba48 = (task->tf_flags & IDE_TFLAG_LBA48) ? 2 : 0;
120 write = (task->tf_flags & IDE_TFLAG_WRITE) ? 1 : 0;
125 index = drive->mult_count ? 0 : 4;
127 task->tf.command = ide_rw_cmds[index + lba48 + write];
130 index = 8; /* fixup index */
132 task->data_phase = ide_data_phases[index / 2 + write];
136 * __ide_do_rw_disk() issues READ and WRITE commands to a disk,
137 * using LBA if supported, or CHS otherwise, to address sectors.
139 static ide_startstop_t __ide_do_rw_disk(ide_drive_t *drive, struct request *rq,
142 ide_hwif_t *hwif = HWIF(drive);
143 unsigned int dma = drive->using_dma;
144 u16 nsectors = (u16)rq->nr_sectors;
145 u8 lba48 = (drive->addressing == 1) ? 1 : 0;
147 struct ide_taskfile *tf = &task.tf;
150 if ((hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA) && lba48 && dma) {
151 if (block + rq->nr_sectors > 1ULL << 28)
158 ide_init_sg_cmd(drive, rq);
159 ide_map_sg(drive, rq);
162 memset(&task, 0, sizeof(task));
163 task.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
165 if (drive->select.b.lba) {
167 pr_debug("%s: LBA=0x%012llx\n", drive->name,
168 (unsigned long long)block);
170 tf->hob_nsect = (nsectors >> 8) & 0xff;
171 tf->hob_lbal = (u8)(block >> 24);
172 if (sizeof(block) != 4) {
173 tf->hob_lbam = (u8)((u64)block >> 32);
174 tf->hob_lbah = (u8)((u64)block >> 40);
177 tf->nsect = nsectors & 0xff;
178 tf->lbal = (u8) block;
179 tf->lbam = (u8)(block >> 8);
180 tf->lbah = (u8)(block >> 16);
182 task.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_HOB);
184 tf->nsect = nsectors & 0xff;
186 tf->lbam = block >>= 8;
187 tf->lbah = block >>= 8;
188 tf->device = (block >> 8) & 0xf;
191 unsigned int sect, head, cyl, track;
193 track = (int)block / drive->sect;
194 sect = (int)block % drive->sect + 1;
195 head = track % drive->head;
196 cyl = track / drive->head;
198 pr_debug("%s: CHS=%u/%u/%u\n", drive->name, cyl, head, sect);
200 tf->nsect = nsectors & 0xff;
208 task.tf_flags |= IDE_TFLAG_WRITE;
210 ide_tf_set_cmd(drive, &task, dma);
212 hwif->data_phase = task.data_phase;
215 rc = do_rw_taskfile(drive, &task);
217 if (rc == ide_stopped && dma) {
218 /* fallback to PIO */
219 task.tf_flags |= IDE_TFLAG_DMA_PIO_FALLBACK;
220 ide_tf_set_cmd(drive, &task, 0);
221 hwif->data_phase = task.data_phase;
222 ide_init_sg_cmd(drive, rq);
223 rc = do_rw_taskfile(drive, &task);
230 * 268435455 == 137439 MB or 28bit limit
231 * 320173056 == 163929 MB or 48bit addressing
232 * 1073741822 == 549756 MB or 48bit addressing fake drive
235 static ide_startstop_t ide_do_rw_disk(ide_drive_t *drive, struct request *rq,
238 ide_hwif_t *hwif = HWIF(drive);
240 BUG_ON(drive->blocked);
242 if (!blk_fs_request(rq)) {
243 blk_dump_rq_flags(rq, "ide_do_rw_disk - bad command");
244 ide_end_request(drive, 0, 0);
248 ledtrig_ide_activity();
250 pr_debug("%s: %sing: block=%llu, sectors=%lu, buffer=0x%08lx\n",
251 drive->name, rq_data_dir(rq) == READ ? "read" : "writ",
252 (unsigned long long)block, rq->nr_sectors,
253 (unsigned long)rq->buffer);
256 hwif->rw_disk(drive, rq);
258 return __ide_do_rw_disk(drive, rq, block);
262 * Queries for true maximum capacity of the drive.
263 * Returns maximum LBA address (> 0) of the drive, 0 if failed.
265 static u64 idedisk_read_native_max_address(ide_drive_t *drive, int lba48)
268 struct ide_taskfile *tf = &args.tf;
271 /* Create IDE/ATA command request structure */
272 memset(&args, 0, sizeof(ide_task_t));
274 tf->command = ATA_CMD_READ_NATIVE_MAX_EXT;
276 tf->command = ATA_CMD_READ_NATIVE_MAX;
277 tf->device = ATA_LBA;
278 args.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
280 args.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_HOB);
281 /* submit command request */
282 ide_no_data_taskfile(drive, &args);
284 /* if OK, compute maximum address value */
285 if ((tf->status & 0x01) == 0)
286 addr = ide_get_lba_addr(tf, lba48) + 1;
292 * Sets maximum virtual LBA address of the drive.
293 * Returns new maximum virtual LBA address (> 0) or 0 on failure.
295 static u64 idedisk_set_max_address(ide_drive_t *drive, u64 addr_req, int lba48)
298 struct ide_taskfile *tf = &args.tf;
302 /* Create IDE/ATA command request structure */
303 memset(&args, 0, sizeof(ide_task_t));
304 tf->lbal = (addr_req >> 0) & 0xff;
305 tf->lbam = (addr_req >>= 8) & 0xff;
306 tf->lbah = (addr_req >>= 8) & 0xff;
308 tf->hob_lbal = (addr_req >>= 8) & 0xff;
309 tf->hob_lbam = (addr_req >>= 8) & 0xff;
310 tf->hob_lbah = (addr_req >>= 8) & 0xff;
311 tf->command = ATA_CMD_SET_MAX_EXT;
313 tf->device = (addr_req >>= 8) & 0x0f;
314 tf->command = ATA_CMD_SET_MAX;
316 tf->device |= ATA_LBA;
317 args.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
319 args.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_HOB);
320 /* submit command request */
321 ide_no_data_taskfile(drive, &args);
322 /* if OK, compute maximum address value */
323 if ((tf->status & 0x01) == 0)
324 addr_set = ide_get_lba_addr(tf, lba48) + 1;
329 static unsigned long long sectors_to_MB(unsigned long long n)
331 n <<= 9; /* make it bytes */
332 do_div(n, 1000000); /* make it MB */
337 * Some disks report total number of sectors instead of
338 * maximum sector address. We list them here.
340 static const struct drive_list_entry hpa_list[] = {
341 { "ST340823A", NULL },
342 { "ST320413A", NULL },
343 { "ST310211A", NULL },
347 static void idedisk_check_hpa(ide_drive_t *drive)
349 unsigned long long capacity, set_max;
350 int lba48 = ata_id_lba48_enabled(drive->id);
352 capacity = drive->capacity64;
354 set_max = idedisk_read_native_max_address(drive, lba48);
356 if (ide_in_drive_list(drive->id, hpa_list)) {
358 * Since we are inclusive wrt to firmware revisions do this
359 * extra check and apply the workaround only when needed.
361 if (set_max == capacity + 1)
365 if (set_max <= capacity)
368 printk(KERN_INFO "%s: Host Protected Area detected.\n"
369 "\tcurrent capacity is %llu sectors (%llu MB)\n"
370 "\tnative capacity is %llu sectors (%llu MB)\n",
372 capacity, sectors_to_MB(capacity),
373 set_max, sectors_to_MB(set_max));
375 set_max = idedisk_set_max_address(drive, set_max, lba48);
378 drive->capacity64 = set_max;
379 printk(KERN_INFO "%s: Host Protected Area disabled.\n",
384 static void init_idedisk_capacity(ide_drive_t *drive)
388 * If this drive supports the Host Protected Area feature set,
389 * then we may need to change our opinion about the drive's capacity.
391 int hpa = ata_id_hpa_enabled(id);
393 if (ata_id_lba48_enabled(id)) {
394 /* drive speaks 48-bit LBA */
395 drive->select.b.lba = 1;
396 drive->capacity64 = ata_id_u64(id, ATA_ID_LBA_CAPACITY_2);
398 idedisk_check_hpa(drive);
399 } else if (ata_id_has_lba(id) && ata_id_is_lba_capacity_ok(id)) {
400 /* drive speaks 28-bit LBA */
401 drive->select.b.lba = 1;
402 drive->capacity64 = ata_id_u32(id, ATA_ID_LBA_CAPACITY);
404 idedisk_check_hpa(drive);
406 /* drive speaks boring old 28-bit CHS */
407 drive->capacity64 = drive->cyl * drive->head * drive->sect;
411 static sector_t idedisk_capacity(ide_drive_t *drive)
413 return drive->capacity64;
416 #ifdef CONFIG_IDE_PROC_FS
417 static int smart_enable(ide_drive_t *drive)
420 struct ide_taskfile *tf = &args.tf;
422 memset(&args, 0, sizeof(ide_task_t));
423 tf->feature = ATA_SMART_ENABLE;
424 tf->lbam = ATA_SMART_LBAM_PASS;
425 tf->lbah = ATA_SMART_LBAH_PASS;
426 tf->command = ATA_CMD_SMART;
427 args.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
428 return ide_no_data_taskfile(drive, &args);
431 static int get_smart_data(ide_drive_t *drive, u8 *buf, u8 sub_cmd)
434 struct ide_taskfile *tf = &args.tf;
436 memset(&args, 0, sizeof(ide_task_t));
437 tf->feature = sub_cmd;
439 tf->lbam = ATA_SMART_LBAM_PASS;
440 tf->lbah = ATA_SMART_LBAH_PASS;
441 tf->command = ATA_CMD_SMART;
442 args.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
443 args.data_phase = TASKFILE_IN;
444 (void) smart_enable(drive);
445 return ide_raw_taskfile(drive, &args, buf, 1);
448 static int proc_idedisk_read_cache
449 (char *page, char **start, off_t off, int count, int *eof, void *data)
451 ide_drive_t *drive = (ide_drive_t *) data;
456 len = sprintf(out, "%i\n", drive->id[ATA_ID_BUF_SIZE] / 2);
458 len = sprintf(out, "(none)\n");
460 PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
463 static int proc_idedisk_read_capacity
464 (char *page, char **start, off_t off, int count, int *eof, void *data)
466 ide_drive_t*drive = (ide_drive_t *)data;
469 len = sprintf(page, "%llu\n", (long long)idedisk_capacity(drive));
471 PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
474 static int proc_idedisk_read_smart(char *page, char **start, off_t off,
475 int count, int *eof, void *data, u8 sub_cmd)
477 ide_drive_t *drive = (ide_drive_t *)data;
480 if (get_smart_data(drive, page, sub_cmd) == 0) {
481 unsigned short *val = (unsigned short *) page;
482 char *out = (char *)val + SECTOR_SIZE;
486 out += sprintf(out, "%04x%c", le16_to_cpu(*val),
487 (++i & 7) ? ' ' : '\n');
489 } while (i < SECTOR_SIZE / 2);
493 PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
496 static int proc_idedisk_read_sv
497 (char *page, char **start, off_t off, int count, int *eof, void *data)
499 return proc_idedisk_read_smart(page, start, off, count, eof, data,
500 ATA_SMART_READ_VALUES);
503 static int proc_idedisk_read_st
504 (char *page, char **start, off_t off, int count, int *eof, void *data)
506 return proc_idedisk_read_smart(page, start, off, count, eof, data,
507 ATA_SMART_READ_THRESHOLDS);
510 static ide_proc_entry_t idedisk_proc[] = {
511 { "cache", S_IFREG|S_IRUGO, proc_idedisk_read_cache, NULL },
512 { "capacity", S_IFREG|S_IRUGO, proc_idedisk_read_capacity, NULL },
513 { "geometry", S_IFREG|S_IRUGO, proc_ide_read_geometry, NULL },
514 { "smart_values", S_IFREG|S_IRUSR, proc_idedisk_read_sv, NULL },
515 { "smart_thresholds", S_IFREG|S_IRUSR, proc_idedisk_read_st, NULL },
516 { NULL, 0, NULL, NULL }
518 #endif /* CONFIG_IDE_PROC_FS */
520 static void idedisk_prepare_flush(struct request_queue *q, struct request *rq)
522 ide_drive_t *drive = q->queuedata;
523 ide_task_t *task = kmalloc(sizeof(*task), GFP_ATOMIC);
525 /* FIXME: map struct ide_taskfile on rq->cmd[] */
526 BUG_ON(task == NULL);
528 memset(task, 0, sizeof(*task));
529 if (ata_id_flush_ext_enabled(drive->id) &&
530 (drive->capacity64 >= (1UL << 28)))
531 task->tf.command = ATA_CMD_FLUSH_EXT;
533 task->tf.command = ATA_CMD_FLUSH;
534 task->tf_flags = IDE_TFLAG_OUT_TF | IDE_TFLAG_OUT_DEVICE |
536 task->data_phase = TASKFILE_NO_DATA;
538 rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
539 rq->cmd_flags |= REQ_SOFTBARRIER;
543 ide_devset_get(multcount, mult_count);
546 * This is tightly woven into the driver->do_special can not touch.
547 * DON'T do it again until a total personality rewrite is committed.
549 static int set_multcount(ide_drive_t *drive, int arg)
554 if (arg < 0 || arg > (drive->id[ATA_ID_MAX_MULTSECT] & 0xff))
557 if (drive->special.b.set_multmode)
560 rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
561 rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
563 drive->mult_req = arg;
564 drive->special.b.set_multmode = 1;
565 error = blk_execute_rq(drive->queue, NULL, rq, 0);
568 return (drive->mult_count == arg) ? 0 : -EIO;
571 ide_devset_get(nowerr, nowerr);
573 static int set_nowerr(ide_drive_t *drive, int arg)
575 if (arg < 0 || arg > 1)
579 drive->bad_wstat = arg ? BAD_R_STAT : BAD_W_STAT;
583 static void update_ordered(ide_drive_t *drive)
586 unsigned ordered = QUEUE_ORDERED_NONE;
587 prepare_flush_fn *prep_fn = NULL;
590 unsigned long long capacity;
593 * We must avoid issuing commands a drive does not
594 * understand or we may crash it. We check flush cache
595 * is supported. We also check we have the LBA48 flush
596 * cache if the drive capacity is too large. By this
597 * time we have trimmed the drive capacity if LBA48 is
598 * not available so we don't need to recheck that.
600 capacity = idedisk_capacity(drive);
601 barrier = ata_id_flush_enabled(id) && !drive->noflush &&
602 (drive->addressing == 0 || capacity <= (1ULL << 28) ||
603 ata_id_flush_ext_enabled(id));
605 printk(KERN_INFO "%s: cache flushes %ssupported\n",
606 drive->name, barrier ? "" : "not ");
609 ordered = QUEUE_ORDERED_DRAIN_FLUSH;
610 prep_fn = idedisk_prepare_flush;
613 ordered = QUEUE_ORDERED_DRAIN;
615 blk_queue_ordered(drive->queue, ordered, prep_fn);
618 ide_devset_get(wcache, wcache);
620 static int set_wcache(ide_drive_t *drive, int arg)
625 if (arg < 0 || arg > 1)
628 if (ata_id_flush_enabled(drive->id)) {
629 memset(&args, 0, sizeof(ide_task_t));
630 args.tf.feature = arg ?
631 SETFEATURES_WC_ON : SETFEATURES_WC_OFF;
632 args.tf.command = ATA_CMD_SET_FEATURES;
633 args.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
634 err = ide_no_data_taskfile(drive, &args);
639 update_ordered(drive);
644 static int do_idedisk_flushcache(ide_drive_t *drive)
648 memset(&args, 0, sizeof(ide_task_t));
649 if (ata_id_flush_ext_enabled(drive->id))
650 args.tf.command = ATA_CMD_FLUSH_EXT;
652 args.tf.command = ATA_CMD_FLUSH;
653 args.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
654 return ide_no_data_taskfile(drive, &args);
657 ide_devset_get(acoustic, acoustic);
659 static int set_acoustic(ide_drive_t *drive, int arg)
663 if (arg < 0 || arg > 254)
666 memset(&args, 0, sizeof(ide_task_t));
667 args.tf.feature = arg ? SETFEATURES_AAM_ON : SETFEATURES_AAM_OFF;
669 args.tf.command = ATA_CMD_SET_FEATURES;
670 args.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
671 ide_no_data_taskfile(drive, &args);
672 drive->acoustic = arg;
676 ide_devset_get(addressing, addressing);
682 * 2: 48-bit capable doing 28-bit
684 static int set_addressing(ide_drive_t *drive, int arg)
686 if (arg < 0 || arg > 2)
689 drive->addressing = 0;
691 if (drive->hwif->host_flags & IDE_HFLAG_NO_LBA48)
694 if (ata_id_lba48_enabled(drive->id) == 0)
697 drive->addressing = arg;
702 ide_devset_rw(acoustic, acoustic);
703 ide_devset_rw(address, addressing);
704 ide_devset_rw(multcount, multcount);
705 ide_devset_rw(wcache, wcache);
707 ide_devset_rw_sync(nowerr, nowerr);
709 #ifdef CONFIG_IDE_PROC_FS
710 ide_devset_rw_field(bios_cyl, bios_cyl);
711 ide_devset_rw_field(bios_head, bios_head);
712 ide_devset_rw_field(bios_sect, bios_sect);
713 ide_devset_rw_field(failures, failures);
714 ide_devset_rw_field(lun, lun);
715 ide_devset_rw_field(max_failures, max_failures);
717 static const struct ide_proc_devset idedisk_settings[] = {
718 IDE_PROC_DEVSET(acoustic, 0, 254),
719 IDE_PROC_DEVSET(address, 0, 2),
720 IDE_PROC_DEVSET(bios_cyl, 0, 65535),
721 IDE_PROC_DEVSET(bios_head, 0, 255),
722 IDE_PROC_DEVSET(bios_sect, 0, 63),
723 IDE_PROC_DEVSET(failures, 0, 65535),
724 IDE_PROC_DEVSET(lun, 0, 7),
725 IDE_PROC_DEVSET(max_failures, 0, 65535),
726 IDE_PROC_DEVSET(multcount, 0, 16),
727 IDE_PROC_DEVSET(nowerr, 0, 1),
728 IDE_PROC_DEVSET(wcache, 0, 1),
733 static void idedisk_setup(ide_drive_t *drive)
735 struct ide_disk_obj *idkp = drive->driver_data;
736 ide_hwif_t *hwif = drive->hwif;
738 char *m = (char *)&id[ATA_ID_PROD];
739 unsigned long long capacity;
741 ide_proc_register_driver(drive, idkp->driver);
743 if (drive->id_read == 0)
746 if (drive->removable) {
748 * Removable disks (eg. SYQUEST); ignore 'WD' drives
750 if (m[0] != 'W' || m[1] != 'D')
751 drive->doorlocking = 1;
754 (void)set_addressing(drive, 1);
756 if (drive->addressing == 1) {
759 if (max_s > hwif->rqsize)
760 max_s = hwif->rqsize;
762 blk_queue_max_sectors(drive->queue, max_s);
765 printk(KERN_INFO "%s: max request size: %dKiB\n", drive->name,
766 drive->queue->max_sectors / 2);
768 /* calculate drive capacity, and select LBA if possible */
769 init_idedisk_capacity(drive);
771 /* limit drive capacity to 137GB if LBA48 cannot be used */
772 if (drive->addressing == 0 && drive->capacity64 > 1ULL << 28) {
773 printk(KERN_WARNING "%s: cannot use LBA48 - full capacity "
774 "%llu sectors (%llu MB)\n",
775 drive->name, (unsigned long long)drive->capacity64,
776 sectors_to_MB(drive->capacity64));
777 drive->capacity64 = 1ULL << 28;
780 if ((hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA) && drive->addressing) {
781 if (drive->capacity64 > 1ULL << 28) {
782 printk(KERN_INFO "%s: cannot use LBA48 DMA - PIO mode"
783 " will be used for accessing sectors "
784 "> %u\n", drive->name, 1 << 28);
786 drive->addressing = 0;
790 * if possible, give fdisk access to more of the drive,
791 * by correcting bios_cyls:
793 capacity = idedisk_capacity(drive);
795 if (!drive->forced_geom) {
796 if (ata_id_lba48_enabled(drive->id)) {
798 drive->bios_sect = 63;
799 drive->bios_head = 255;
802 if (drive->bios_sect && drive->bios_head) {
803 unsigned int cap0 = capacity; /* truncate to 32 bits */
804 unsigned int cylsz, cyl;
806 if (cap0 != capacity)
807 drive->bios_cyl = 65535;
809 cylsz = drive->bios_sect * drive->bios_head;
813 if (cyl > drive->bios_cyl)
814 drive->bios_cyl = cyl;
818 printk(KERN_INFO "%s: %llu sectors (%llu MB)",
819 drive->name, capacity, sectors_to_MB(capacity));
821 /* Only print cache size when it was specified */
822 if (id[ATA_ID_BUF_SIZE])
823 printk(KERN_CONT " w/%dKiB Cache", id[ATA_ID_BUF_SIZE] / 2);
825 printk(KERN_CONT ", CHS=%d/%d/%d\n",
826 drive->bios_cyl, drive->bios_head, drive->bios_sect);
828 /* write cache enabled? */
829 if ((id[ATA_ID_CSFO] & 1) || ata_id_wcache_enabled(id))
832 set_wcache(drive, 1);
835 static void ide_cacheflush_p(ide_drive_t *drive)
837 if (!drive->wcache || ata_id_flush_enabled(drive->id) == 0)
840 if (do_idedisk_flushcache(drive))
841 printk(KERN_INFO "%s: wcache flush failed!\n", drive->name);
844 static void ide_disk_remove(ide_drive_t *drive)
846 struct ide_disk_obj *idkp = drive->driver_data;
847 struct gendisk *g = idkp->disk;
849 ide_proc_unregister_driver(drive, idkp->driver);
853 ide_cacheflush_p(drive);
858 static void ide_disk_release(struct kref *kref)
860 struct ide_disk_obj *idkp = to_ide_disk(kref);
861 ide_drive_t *drive = idkp->drive;
862 struct gendisk *g = idkp->disk;
864 drive->driver_data = NULL;
865 g->private_data = NULL;
870 static int ide_disk_probe(ide_drive_t *drive);
873 * On HPA drives the capacity needs to be
874 * reinitilized on resume otherwise the disk
875 * can not be used and a hard reset is required
877 static void ide_disk_resume(ide_drive_t *drive)
879 if (ata_id_hpa_enabled(drive->id))
880 init_idedisk_capacity(drive);
883 static void ide_device_shutdown(ide_drive_t *drive)
886 /* On Alpha, halt(8) doesn't actually turn the machine off,
887 it puts you into the sort of firmware monitor. Typically,
888 it's used to boot another kernel image, so it's not much
889 different from reboot(8). Therefore, we don't need to
890 spin down the disk in this case, especially since Alpha
891 firmware doesn't handle disks in standby mode properly.
892 On the other hand, it's reasonably safe to turn the power
893 off when the shutdown process reaches the firmware prompt,
894 as the firmware initialization takes rather long time -
895 at least 10 seconds, which should be sufficient for
896 the disk to expire its write cache. */
897 if (system_state != SYSTEM_POWER_OFF) {
899 if (system_state == SYSTEM_RESTART) {
901 ide_cacheflush_p(drive);
905 printk(KERN_INFO "Shutdown: %s\n", drive->name);
907 drive->gendev.bus->suspend(&drive->gendev, PMSG_SUSPEND);
910 static ide_driver_t idedisk_driver = {
912 .owner = THIS_MODULE,
914 .bus = &ide_bus_type,
916 .probe = ide_disk_probe,
917 .remove = ide_disk_remove,
918 .resume = ide_disk_resume,
919 .shutdown = ide_device_shutdown,
920 .version = IDEDISK_VERSION,
922 .do_request = ide_do_rw_disk,
923 .end_request = ide_end_request,
924 .error = __ide_error,
925 #ifdef CONFIG_IDE_PROC_FS
926 .proc = idedisk_proc,
927 .settings = idedisk_settings,
931 static int idedisk_set_doorlock(ide_drive_t *drive, int on)
935 memset(&task, 0, sizeof(task));
936 task.tf.command = on ? ATA_CMD_MEDIA_LOCK : ATA_CMD_MEDIA_UNLOCK;
937 task.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
939 return ide_no_data_taskfile(drive, &task);
942 static int idedisk_open(struct inode *inode, struct file *filp)
944 struct gendisk *disk = inode->i_bdev->bd_disk;
945 struct ide_disk_obj *idkp;
948 idkp = ide_disk_get(disk);
956 if (drive->removable && idkp->openers == 1) {
957 check_disk_change(inode->i_bdev);
959 * Ignore the return code from door_lock,
960 * since the open() has already succeeded,
961 * and the door_lock is irrelevant at this point.
963 if (drive->doorlocking && idedisk_set_doorlock(drive, 1))
964 drive->doorlocking = 0;
969 static int idedisk_release(struct inode *inode, struct file *filp)
971 struct gendisk *disk = inode->i_bdev->bd_disk;
972 struct ide_disk_obj *idkp = ide_disk_g(disk);
973 ide_drive_t *drive = idkp->drive;
975 if (idkp->openers == 1)
976 ide_cacheflush_p(drive);
978 if (drive->removable && idkp->openers == 1) {
979 if (drive->doorlocking && idedisk_set_doorlock(drive, 0))
980 drive->doorlocking = 0;
990 static int idedisk_getgeo(struct block_device *bdev, struct hd_geometry *geo)
992 struct ide_disk_obj *idkp = ide_disk_g(bdev->bd_disk);
993 ide_drive_t *drive = idkp->drive;
995 geo->heads = drive->bios_head;
996 geo->sectors = drive->bios_sect;
997 geo->cylinders = (u16)drive->bios_cyl; /* truncate */
1001 static const struct ide_ioctl_devset ide_disk_ioctl_settings[] = {
1002 { HDIO_GET_ADDRESS, HDIO_SET_ADDRESS, &ide_devset_address },
1003 { HDIO_GET_MULTCOUNT, HDIO_SET_MULTCOUNT, &ide_devset_multcount },
1004 { HDIO_GET_NOWERR, HDIO_SET_NOWERR, &ide_devset_nowerr },
1005 { HDIO_GET_WCACHE, HDIO_SET_WCACHE, &ide_devset_wcache },
1006 { HDIO_GET_ACOUSTIC, HDIO_SET_ACOUSTIC, &ide_devset_acoustic },
1010 static int idedisk_ioctl(struct inode *inode, struct file *file,
1011 unsigned int cmd, unsigned long arg)
1013 struct block_device *bdev = inode->i_bdev;
1014 struct ide_disk_obj *idkp = ide_disk_g(bdev->bd_disk);
1015 ide_drive_t *drive = idkp->drive;
1018 err = ide_setting_ioctl(drive, bdev, cmd, arg, ide_disk_ioctl_settings);
1019 if (err != -EOPNOTSUPP)
1022 return generic_ide_ioctl(drive, file, bdev, cmd, arg);
1025 static int idedisk_media_changed(struct gendisk *disk)
1027 struct ide_disk_obj *idkp = ide_disk_g(disk);
1028 ide_drive_t *drive = idkp->drive;
1030 /* do not scan partitions twice if this is a removable device */
1031 if (drive->attach) {
1035 /* if removable, always assume it was changed */
1036 return drive->removable;
1039 static int idedisk_revalidate_disk(struct gendisk *disk)
1041 struct ide_disk_obj *idkp = ide_disk_g(disk);
1042 set_capacity(disk, idedisk_capacity(idkp->drive));
1046 static struct block_device_operations idedisk_ops = {
1047 .owner = THIS_MODULE,
1048 .open = idedisk_open,
1049 .release = idedisk_release,
1050 .ioctl = idedisk_ioctl,
1051 .getgeo = idedisk_getgeo,
1052 .media_changed = idedisk_media_changed,
1053 .revalidate_disk = idedisk_revalidate_disk
1056 MODULE_DESCRIPTION("ATA DISK Driver");
1058 static int ide_disk_probe(ide_drive_t *drive)
1060 struct ide_disk_obj *idkp;
1063 /* strstr("foo", "") is non-NULL */
1064 if (!strstr("ide-disk", drive->driver_req))
1067 if (drive->media != ide_disk)
1070 idkp = kzalloc(sizeof(*idkp), GFP_KERNEL);
1074 g = alloc_disk_node(IDE_DISK_MINORS, hwif_to_node(drive->hwif));
1078 ide_init_disk(g, drive);
1080 kref_init(&idkp->kref);
1082 idkp->drive = drive;
1083 idkp->driver = &idedisk_driver;
1086 g->private_data = &idkp->driver;
1088 drive->driver_data = idkp;
1090 idedisk_setup(drive);
1091 if ((!drive->head || drive->head > 16) && !drive->select.b.lba) {
1092 printk(KERN_ERR "%s: INVALID GEOMETRY: %d PHYSICAL HEADS?\n",
1093 drive->name, drive->head);
1098 g->minors = IDE_DISK_MINORS;
1099 g->driverfs_dev = &drive->gendev;
1100 g->flags |= GENHD_FL_EXT_DEVT;
1101 if (drive->removable)
1102 g->flags |= GENHD_FL_REMOVABLE;
1103 set_capacity(g, idedisk_capacity(drive));
1104 g->fops = &idedisk_ops;
1114 static void __exit idedisk_exit(void)
1116 driver_unregister(&idedisk_driver.gen_driver);
1119 static int __init idedisk_init(void)
1121 return driver_register(&idedisk_driver.gen_driver);
1124 MODULE_ALIAS("ide:*m-disk*");
1125 module_init(idedisk_init);
1126 module_exit(idedisk_exit);
1127 MODULE_LICENSE("GPL");