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/*
* linux/drivers/ide/ide-disk.c Version 1.10 June 9, 2000
*
* Copyright (C) 1994-1998 Linus Torvalds & authors (see below)
*/
/*
* Mostly written by Mark Lord <mlord@pobox.com>
* and Gadi Oxman <gadio@netvision.net.il>
* and Andre Hedrick <andre@linux-ide.org>
*
* This is the IDE/ATA disk driver, as evolved from hd.c and ide.c.
*
* Version 1.00 move disk only code from ide.c to ide-disk.c
* support optional byte-swapping of all data
* Version 1.01 fix previous byte-swapping code
* Version 1.02 remove ", LBA" from drive identification msgs
* Version 1.03 fix display of id->buf_size for big-endian
* Version 1.04 add /proc configurable settings and S.M.A.R.T support
* Version 1.05 add capacity support for ATA3 >= 8GB
* Version 1.06 get boot-up messages to show full cyl count
* Version 1.07 disable door-locking if it fails
* Version 1.08 fixed CHS/LBA translations for ATA4 > 8GB,
* process of adding new ATA4 compliance.
* fixed problems in allowing fdisk to see
* the entire disk.
* Version 1.09 added increment of rq->sector in ide_multwrite
* added UDMA 3/4 reporting
* Version 1.10 request queue changes, Ultra DMA 100
*/
#define IDEDISK_VERSION "1.10"
#undef REALLY_SLOW_IO /* most systems can safely undef this */
#include <linux/config.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/string.h>
#include <linux/kernel.h>
#include <linux/timer.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <linux/major.h>
#include <linux/errno.h>
#include <linux/genhd.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/ide.h>
#include <asm/byteorder.h>
#include <asm/irq.h>
#include <asm/uaccess.h>
#include <asm/io.h>
#ifdef CONFIG_BLK_DEV_PDC4030
#define IS_PDC4030_DRIVE (HWIF(drive)->chipset == ide_pdc4030)
#else
#define IS_PDC4030_DRIVE (0) /* auto-NULLs out pdc4030 code */
#endif
static void idedisk_bswap_data (void *buffer, int wcount)
{
u16 *p = buffer;
while (wcount--) {
*p = *p << 8 | *p >> 8; p++;
*p = *p << 8 | *p >> 8; p++;
}
}
static inline void idedisk_input_data (ide_drive_t *drive, void *buffer, unsigned int wcount)
{
ide_input_data(drive, buffer, wcount);
if (drive->bswap)
idedisk_bswap_data(buffer, wcount);
}
static inline void idedisk_output_data (ide_drive_t *drive, void *buffer, unsigned int wcount)
{
if (drive->bswap) {
idedisk_bswap_data(buffer, wcount);
ide_output_data(drive, buffer, wcount);
idedisk_bswap_data(buffer, wcount);
} else
ide_output_data(drive, buffer, wcount);
}
/*
* lba_capacity_is_ok() performs a sanity check on the claimed "lba_capacity"
* value for this drive (from its reported identification information).
*
* Returns: 1 if lba_capacity looks sensible
* 0 otherwise
*
* It is called only once for each drive.
*/
static int lba_capacity_is_ok (struct hd_driveid *id)
{
unsigned long lba_sects, chs_sects, head, tail;
/*
* The ATA spec tells large drives to return
* C/H/S = 16383/16/63 independent of their size.
* Some drives can be jumpered to use 15 heads instead of 16.
* Some drives can be jumpered to use 4092 cyls instead of 16383.
*/
if ((id->cyls == 16383
|| (id->cyls == 4092 && id->cur_cyls == 16383)) &&
id->sectors == 63 &&
(id->heads == 15 || id->heads == 16) &&
id->lba_capacity >= 16383*63*id->heads)
return 1;
lba_sects = id->lba_capacity;
chs_sects = id->cyls * id->heads * id->sectors;
/* perform a rough sanity check on lba_sects: within 10% is OK */
if ((lba_sects - chs_sects) < chs_sects/10)
return 1;
/* some drives have the word order reversed */
head = ((lba_sects >> 16) & 0xffff);
tail = (lba_sects & 0xffff);
lba_sects = (head | (tail << 16));
if ((lba_sects - chs_sects) < chs_sects/10) {
id->lba_capacity = lba_sects;
return 1; /* lba_capacity is (now) good */
}
return 0; /* lba_capacity value may be bad */
}
/*
* read_intr() is the handler for disk read/multread interrupts
*/
static ide_startstop_t read_intr (ide_drive_t *drive)
{
byte stat;
int i;
unsigned int msect, nsect;
struct request *rq;
/* new way for dealing with premature shared PCI interrupts */
if (!OK_STAT(stat=GET_STAT(),DATA_READY,BAD_R_STAT)) {
if (stat & (ERR_STAT|DRQ_STAT)) {
return ide_error(drive, "read_intr", stat);
}
/* no data yet, so wait for another interrupt */
ide_set_handler(drive, &read_intr, WAIT_CMD, NULL);
return ide_started;
}
msect = drive->mult_count;
read_next:
rq = HWGROUP(drive)->rq;
if (msect) {
if ((nsect = rq->current_nr_sectors) > msect)
nsect = msect;
msect -= nsect;
} else
nsect = 1;
idedisk_input_data(drive, rq->buffer, nsect * SECTOR_WORDS);
#ifdef DEBUG
printk("%s: read: sectors(%ld-%ld), buffer=0x%08lx, remaining=%ld\n",
drive->name, rq->sector, rq->sector+nsect-1,
(unsigned long) rq->buffer+(nsect<<9), rq->nr_sectors-nsect);
#endif
rq->sector += nsect;
rq->buffer += nsect<<9;
rq->errors = 0;
i = (rq->nr_sectors -= nsect);
if (((long)(rq->current_nr_sectors -= nsect)) <= 0)
ide_end_request(1, HWGROUP(drive));
if (i > 0) {
if (msect)
goto read_next;
ide_set_handler (drive, &read_intr, WAIT_CMD, NULL);
return ide_started;
}
return ide_stopped;
}
/*
* write_intr() is the handler for disk write interrupts
*/
static ide_startstop_t write_intr (ide_drive_t *drive)
{
byte stat;
int i;
ide_hwgroup_t *hwgroup = HWGROUP(drive);
struct request *rq = hwgroup->rq;
if (!OK_STAT(stat=GET_STAT(),DRIVE_READY,drive->bad_wstat)) {
printk("%s: write_intr error1: nr_sectors=%ld, stat=0x%02x\n", drive->name, rq->nr_sectors, stat);
} else {
#ifdef DEBUG
printk("%s: write: sector %ld, buffer=0x%08lx, remaining=%ld\n",
drive->name, rq->sector, (unsigned long) rq->buffer,
rq->nr_sectors-1);
#endif
if ((rq->nr_sectors == 1) ^ ((stat & DRQ_STAT) != 0)) {
rq->sector++;
rq->buffer += 512;
rq->errors = 0;
i = --rq->nr_sectors;
--rq->current_nr_sectors;
if (((long)rq->current_nr_sectors) <= 0)
ide_end_request(1, hwgroup);
if (i > 0) {
idedisk_output_data (drive, rq->buffer, SECTOR_WORDS);
ide_set_handler (drive, &write_intr, WAIT_CMD, NULL);
return ide_started;
}
return ide_stopped;
}
return ide_stopped; /* the original code did this here (?) */
}
return ide_error(drive, "write_intr", stat);
}
/*
* ide_multwrite() transfers a block of up to mcount sectors of data
* to a drive as part of a disk multiple-sector write operation.
*
* Returns 0 on success.
*
* Note that we may be called from two contexts - the do_rw_disk context
* and IRQ context. The IRQ can happen any time after we've output the
* full "mcount" number of sectors, so we must make sure we update the
* state _before_ we output the final part of the data!
*/
int ide_multwrite (ide_drive_t *drive, unsigned int mcount)
{
ide_hwgroup_t *hwgroup= HWGROUP(drive);
struct request *rq = &hwgroup->wrq;
do {
char *buffer;
int nsect = rq->current_nr_sectors;
if (nsect > mcount)
nsect = mcount;
mcount -= nsect;
buffer = rq->buffer;
rq->sector += nsect;
rq->buffer += nsect << 9;
rq->nr_sectors -= nsect;
rq->current_nr_sectors -= nsect;
/* Do we move to the next bh after this? */
if (!rq->current_nr_sectors) {
struct buffer_head *bh = rq->bh->b_reqnext;
/* end early early we ran out of requests */
if (!bh) {
mcount = 0;
} else {
rq->bh = bh;
rq->current_nr_sectors = bh->b_size >> 9;
rq->buffer = bh->b_data;
}
}
/*
* Ok, we're all setup for the interrupt
* re-entering us on the last transfer.
*/
idedisk_output_data(drive, buffer, nsect<<7);
} while (mcount);
return 0;
}
/*
* multwrite_intr() is the handler for disk multwrite interrupts
*/
static ide_startstop_t multwrite_intr (ide_drive_t *drive)
{
byte stat;
int i;
ide_hwgroup_t *hwgroup = HWGROUP(drive);
struct request *rq = &hwgroup->wrq;
if (OK_STAT(stat=GET_STAT(),DRIVE_READY,drive->bad_wstat)) {
if (stat & DRQ_STAT) {
/*
* The drive wants data. Remember rq is the copy
* of the request
*/
if (rq->nr_sectors) {
if (ide_multwrite(drive, drive->mult_count))
return ide_stopped;
ide_set_handler (drive, &multwrite_intr, WAIT_CMD, NULL);
return ide_started;
}
} else {
/*
* If the copy has all the blocks completed then
* we can end the original request.
*/
if (!rq->nr_sectors) { /* all done? */
rq = hwgroup->rq;
for (i = rq->nr_sectors; i > 0;){
i -= rq->current_nr_sectors;
ide_end_request(1, hwgroup);
}
return ide_stopped;
}
}
return ide_stopped; /* the original code did this here (?) */
}
return ide_error(drive, "multwrite_intr", stat);
}
/*
* set_multmode_intr() is invoked on completion of a WIN_SETMULT cmd.
*/
static ide_startstop_t set_multmode_intr (ide_drive_t *drive)
{
byte stat;
if (OK_STAT(stat=GET_STAT(),READY_STAT,BAD_STAT)) {
drive->mult_count = drive->mult_req;
} else {
drive->mult_req = drive->mult_count = 0;
drive->special.b.recalibrate = 1;
(void) ide_dump_status(drive, "set_multmode", stat);
}
return ide_stopped;
}
/*
* set_geometry_intr() is invoked on completion of a WIN_SPECIFY cmd.
*/
static ide_startstop_t set_geometry_intr (ide_drive_t *drive)
{
byte stat;
if (OK_STAT(stat=GET_STAT(),READY_STAT,BAD_STAT))
return ide_stopped;
if (stat & (ERR_STAT|DRQ_STAT))
return ide_error(drive, "set_geometry_intr", stat);
ide_set_handler(drive, &set_geometry_intr, WAIT_CMD, NULL);
return ide_started;
}
/*
* recal_intr() is invoked on completion of a WIN_RESTORE (recalibrate) cmd.
*/
static ide_startstop_t recal_intr (ide_drive_t *drive)
{
byte stat = GET_STAT();
if (!OK_STAT(stat,READY_STAT,BAD_STAT))
return ide_error(drive, "recal_intr", stat);
return ide_stopped;
}
/*
* do_rw_disk() issues READ and WRITE commands to a disk,
* using LBA if supported, or CHS otherwise, to address sectors.
* It also takes care of issuing special DRIVE_CMDs.
*/
static ide_startstop_t do_rw_disk (ide_drive_t *drive, struct request *rq, unsigned long block)
{
if (IDE_CONTROL_REG)
OUT_BYTE(drive->ctl,IDE_CONTROL_REG);
OUT_BYTE(0x00, IDE_FEATURE_REG);
OUT_BYTE(rq->nr_sectors,IDE_NSECTOR_REG);
#ifdef CONFIG_BLK_DEV_PDC4030
if (drive->select.b.lba || IS_PDC4030_DRIVE) {
#else /* !CONFIG_BLK_DEV_PDC4030 */
if (drive->select.b.lba) {
#endif /* CONFIG_BLK_DEV_PDC4030 */
#ifdef DEBUG
printk("%s: %sing: LBAsect=%ld, sectors=%ld, buffer=0x%08lx\n",
drive->name, (rq->cmd==READ)?"read":"writ",
block, rq->nr_sectors, (unsigned long) rq->buffer);
#endif
OUT_BYTE(block,IDE_SECTOR_REG);
OUT_BYTE(block>>=8,IDE_LCYL_REG);
OUT_BYTE(block>>=8,IDE_HCYL_REG);
OUT_BYTE(((block>>8)&0x0f)|drive->select.all,IDE_SELECT_REG);
} else {
unsigned int sect,head,cyl,track;
track = block / drive->sect;
sect = block % drive->sect + 1;
OUT_BYTE(sect,IDE_SECTOR_REG);
head = track % drive->head;
cyl = track / drive->head;
OUT_BYTE(cyl,IDE_LCYL_REG);
OUT_BYTE(cyl>>8,IDE_HCYL_REG);
OUT_BYTE(head|drive->select.all,IDE_SELECT_REG);
#ifdef DEBUG
printk("%s: %sing: CHS=%d/%d/%d, sectors=%ld, buffer=0x%08lx\n",
drive->name, (rq->cmd==READ)?"read":"writ", cyl,
head, sect, rq->nr_sectors, (unsigned long) rq->buffer);
#endif
}
#ifdef CONFIG_BLK_DEV_PDC4030
if (IS_PDC4030_DRIVE) {
extern ide_startstop_t do_pdc4030_io(ide_drive_t *, struct request *);
return do_pdc4030_io (drive, rq);
}
#endif /* CONFIG_BLK_DEV_PDC4030 */
if (rq->cmd == READ) {
#ifdef CONFIG_BLK_DEV_IDEDMA
if (drive->using_dma && !(HWIF(drive)->dmaproc(ide_dma_read, drive)))
return ide_started;
#endif /* CONFIG_BLK_DEV_IDEDMA */
ide_set_handler(drive, &read_intr, WAIT_CMD, NULL);
OUT_BYTE(drive->mult_count ? WIN_MULTREAD : WIN_READ, IDE_COMMAND_REG);
return ide_started;
}
if (rq->cmd == WRITE) {
ide_startstop_t startstop;
#ifdef CONFIG_BLK_DEV_IDEDMA
if (drive->using_dma && !(HWIF(drive)->dmaproc(ide_dma_write, drive)))
return ide_started;
#endif /* CONFIG_BLK_DEV_IDEDMA */
OUT_BYTE(drive->mult_count ? WIN_MULTWRITE : WIN_WRITE, IDE_COMMAND_REG);
if (ide_wait_stat(&startstop, drive, DATA_READY, drive->bad_wstat, WAIT_DRQ)) {
printk(KERN_ERR "%s: no DRQ after issuing %s\n", drive->name,
drive->mult_count ? "MULTWRITE" : "WRITE");
return startstop;
}
if (!drive->unmask)
__cli(); /* local CPU only */
if (drive->mult_count) {
ide_hwgroup_t *hwgroup = HWGROUP(drive);
/*
* Ugh.. this part looks ugly because we MUST set up
* the interrupt handler before outputting the first block
* of data to be written. If we hit an error (corrupted buffer list)
* in ide_multwrite(), then we need to remove the handler/timer
* before returning. Fortunately, this NEVER happens (right?).
*
* Except when you get an error it seems...
*/
hwgroup->wrq = *rq; /* scratchpad */
ide_set_handler (drive, &multwrite_intr, WAIT_CMD, NULL);
if (ide_multwrite(drive, drive->mult_count)) {
unsigned long flags;
spin_lock_irqsave(&io_request_lock, flags);
hwgroup->handler = NULL;
del_timer(&hwgroup->timer);
spin_unlock_irqrestore(&io_request_lock, flags);
return ide_stopped;
}
} else {
ide_set_handler (drive, &write_intr, WAIT_CMD, NULL);
idedisk_output_data(drive, rq->buffer, SECTOR_WORDS);
}
return ide_started;
}
printk(KERN_ERR "%s: bad command: %d\n", drive->name, rq->cmd);
ide_end_request(0, HWGROUP(drive));
return ide_stopped;
}
static int idedisk_open (struct inode *inode, struct file *filp, ide_drive_t *drive)
{
MOD_INC_USE_COUNT;
if (drive->removable && drive->usage == 1) {
check_disk_change(inode->i_rdev);
/*
* Ignore the return code from door_lock,
* since the open() has already succeeded,
* and the door_lock is irrelevant at this point.
*/
if (drive->doorlocking && ide_wait_cmd(drive, WIN_DOORLOCK, 0, 0, 0, NULL))
drive->doorlocking = 0;
}
return 0;
}
static void idedisk_release (struct inode *inode, struct file *filp, ide_drive_t *drive)
{
if (drive->removable && !drive->usage) {
invalidate_bdev(inode->i_bdev, 0);
if (drive->doorlocking && ide_wait_cmd(drive, WIN_DOORUNLOCK, 0, 0, 0, NULL))
drive->doorlocking = 0;
}
MOD_DEC_USE_COUNT;
}
static int idedisk_media_change (ide_drive_t *drive)
{
return drive->removable; /* if removable, always assume it was changed */
}
static void idedisk_revalidate (ide_drive_t *drive)
{
grok_partitions(HWIF(drive)->gd, drive->select.b.unit,
1<<PARTN_BITS,
current_capacity(drive));
}
/*
* Compute drive->capacity, the full capacity of the drive
* Called with drive->id != NULL.
*/
static void init_idedisk_capacity (ide_drive_t *drive)
{
struct hd_driveid *id = drive->id;
unsigned long capacity = drive->cyl * drive->head * drive->sect;
drive->select.b.lba = 0;
/* Determine capacity, and use LBA if the drive properly supports it */
if ((id->capability & 2) && lba_capacity_is_ok(id)) {
capacity = id->lba_capacity;
drive->cyl = capacity / (drive->head * drive->sect);
drive->select.b.lba = 1;
}
drive->capacity = capacity;
}
static unsigned long idedisk_capacity (ide_drive_t *drive)
{
return (drive->capacity - drive->sect0);
}
static ide_startstop_t idedisk_special (ide_drive_t *drive)
{
special_t *s = &drive->special;
if (s->b.set_geometry) {
s->b.set_geometry = 0;
OUT_BYTE(drive->sect,IDE_SECTOR_REG);
OUT_BYTE(drive->cyl,IDE_LCYL_REG);
OUT_BYTE(drive->cyl>>8,IDE_HCYL_REG);
OUT_BYTE(((drive->head-1)|drive->select.all)&0xBF,IDE_SELECT_REG);
if (!IS_PDC4030_DRIVE)
ide_cmd(drive, WIN_SPECIFY, drive->sect, &set_geometry_intr);
} else if (s->b.recalibrate) {
s->b.recalibrate = 0;
if (!IS_PDC4030_DRIVE)
ide_cmd(drive, WIN_RESTORE, drive->sect, &recal_intr);
} else if (s->b.set_multmode) {
s->b.set_multmode = 0;
if (drive->id && drive->mult_req > drive->id->max_multsect)
drive->mult_req = drive->id->max_multsect;
if (!IS_PDC4030_DRIVE)
ide_cmd(drive, WIN_SETMULT, drive->mult_req, &set_multmode_intr);
} else if (s->all) {
int special = s->all;
s->all = 0;
printk(KERN_ERR "%s: bad special flag: 0x%02x\n", drive->name, special);
return ide_stopped;
}
return IS_PDC4030_DRIVE ? ide_stopped : ide_started;
}
static void idedisk_pre_reset (ide_drive_t *drive)
{
drive->special.all = 0;
drive->special.b.set_geometry = 1;
drive->special.b.recalibrate = 1;
if (OK_TO_RESET_CONTROLLER)
drive->mult_count = 0;
if (!drive->keep_settings && !drive->using_dma)
drive->mult_req = 0;
if (drive->mult_req != drive->mult_count)
drive->special.b.set_multmode = 1;
}
#ifdef CONFIG_PROC_FS
static int smart_enable(ide_drive_t *drive)
{
return ide_wait_cmd(drive, WIN_SMART, 0, SMART_ENABLE, 0, NULL);
}
static int get_smart_values(ide_drive_t *drive, byte *buf)
{
(void) smart_enable(drive);
return ide_wait_cmd(drive, WIN_SMART, 0, SMART_READ_VALUES, 1, buf);
}
static int get_smart_thresholds(ide_drive_t *drive, byte *buf)
{
(void) smart_enable(drive);
return ide_wait_cmd(drive, WIN_SMART, 0, SMART_READ_THRESHOLDS, 1, buf);
}
static int proc_idedisk_read_cache
(char *page, char **start, off_t off, int count, int *eof, void *data)
{
ide_drive_t *drive = (ide_drive_t *) data;
char *out = page;
int len;
if (drive->id)
len = sprintf(out,"%i\n", drive->id->buf_size / 2);
else
len = sprintf(out,"(none)\n");
PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
}
static int proc_idedisk_read_smart_thresholds
(char *page, char **start, off_t off, int count, int *eof, void *data)
{
ide_drive_t *drive = (ide_drive_t *)data;
int len = 0, i = 0;
if (!get_smart_thresholds(drive, page)) {
unsigned short *val = ((unsigned short *)page) + 2;
char *out = ((char *)val) + (SECTOR_WORDS * 4);
page = out;
do {
out += sprintf(out, "%04x%c", le16_to_cpu(*val), (++i & 7) ? ' ' : '\n');
val += 1;
} while (i < (SECTOR_WORDS * 2));
len = out - page;
}
PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
}
static int proc_idedisk_read_smart_values
(char *page, char **start, off_t off, int count, int *eof, void *data)
{
ide_drive_t *drive = (ide_drive_t *)data;
int len = 0, i = 0;
if (!get_smart_values(drive, page)) {
unsigned short *val = ((unsigned short *)page) + 2;
char *out = ((char *)val) + (SECTOR_WORDS * 4);
page = out;
do {
out += sprintf(out, "%04x%c", le16_to_cpu(*val), (++i & 7) ? ' ' : '\n');
val += 1;
} while (i < (SECTOR_WORDS * 2));
len = out - page;
}
PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
}
static ide_proc_entry_t idedisk_proc[] = {
{ "cache", S_IFREG|S_IRUGO, proc_idedisk_read_cache, NULL },
{ "geometry", S_IFREG|S_IRUGO, proc_ide_read_geometry, NULL },
{ "smart_values", S_IFREG|S_IRUSR, proc_idedisk_read_smart_values, NULL },
{ "smart_thresholds", S_IFREG|S_IRUSR, proc_idedisk_read_smart_thresholds, NULL },
{ NULL, 0, NULL, NULL }
};
#else
#define idedisk_proc NULL
#endif /* CONFIG_PROC_FS */
static int set_multcount(ide_drive_t *drive, int arg)
{
struct request rq;
if (drive->special.b.set_multmode)
return -EBUSY;
ide_init_drive_cmd (&rq);
drive->mult_req = arg;
drive->special.b.set_multmode = 1;
(void) ide_do_drive_cmd (drive, &rq, ide_wait);
return (drive->mult_count == arg) ? 0 : -EIO;
}
static int set_nowerr(ide_drive_t *drive, int arg)
{
if (ide_spin_wait_hwgroup(drive))
return -EBUSY;
drive->nowerr = arg;
drive->bad_wstat = arg ? BAD_R_STAT : BAD_W_STAT;
spin_unlock_irq(&io_request_lock);
return 0;
}
static void idedisk_add_settings(ide_drive_t *drive)
{
struct hd_driveid *id = drive->id;
int major = HWIF(drive)->major;
int minor = drive->select.b.unit << PARTN_BITS;
ide_add_setting(drive, "bios_cyl", SETTING_RW, -1, -1, TYPE_INT, 0, 65535, 1, 1, &drive->bios_cyl, NULL);
ide_add_setting(drive, "bios_head", SETTING_RW, -1, -1, TYPE_BYTE, 0, 255, 1, 1, &drive->bios_head, NULL);
ide_add_setting(drive, "bios_sect", SETTING_RW, -1, -1, TYPE_BYTE, 0, 63, 1, 1, &drive->bios_sect, NULL);
ide_add_setting(drive, "bswap", SETTING_READ, -1, -1, TYPE_BYTE, 0, 1, 1, 1, &drive->bswap, NULL);
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);
ide_add_setting(drive, "nowerr", SETTING_RW, HDIO_GET_NOWERR, HDIO_SET_NOWERR, TYPE_BYTE, 0, 1, 1, 1, &drive->nowerr, set_nowerr);
ide_add_setting(drive, "breada_readahead", SETTING_RW, BLKRAGET, BLKRASET, TYPE_INT, 0, 255, 1, 2, &read_ahead[major], NULL);
ide_add_setting(drive, "file_readahead", SETTING_RW, BLKFRAGET, BLKFRASET, TYPE_INTA, 0, 4096, PAGE_SIZE, 1024, &max_readahead[major][minor], NULL);
ide_add_setting(drive, "max_kb_per_request", SETTING_RW, BLKSECTGET, BLKSECTSET, TYPE_INTA, 1, 255, 1, 2, &max_sectors[major][minor], NULL);
ide_add_setting(drive, "lun", SETTING_RW, -1, -1, TYPE_INT, 0, 7, 1, 1, &drive->lun, NULL);
ide_add_setting(drive, "failures", SETTING_RW, -1, -1, TYPE_INT, 0, 65535, 1, 1, &drive->failures, NULL);
ide_add_setting(drive, "max_failures", SETTING_RW, -1, -1, TYPE_INT, 0, 65535, 1, 1, &drive->max_failures, NULL);
}
static void idedisk_setup (ide_drive_t *drive)
{
int i;
struct hd_driveid *id = drive->id;
unsigned long capacity;
idedisk_add_settings(drive);
if (id == NULL)
return;
/*
* CompactFlash cards and their brethern look just like hard drives
* to us, but they are removable and don't have a doorlock mechanism.
*/
if (drive->removable && !drive_is_flashcard(drive)) {
/*
* Removable disks (eg. SYQUEST); ignore 'WD' drives
*/
if (id->model[0] != 'W' || id->model[1] != 'D') {
drive->doorlocking = 1;
}
}
for (i = 0; i < MAX_DRIVES; ++i) {
ide_hwif_t *hwif = HWIF(drive);
if (drive != &hwif->drives[i]) continue;
hwif->gd->de_arr[i] = drive->de;
if (drive->removable)
hwif->gd->flags[i] |= GENHD_FL_REMOVABLE;
break;
}
/* Extract geometry if we did not already have one for the drive */
if (!drive->cyl || !drive->head || !drive->sect) {
drive->cyl = drive->bios_cyl = id->cyls;
drive->head = drive->bios_head = id->heads;
drive->sect = drive->bios_sect = id->sectors;
}
/* Handle logical geometry translation by the drive */
if ((id->field_valid & 1) && id->cur_cyls &&
id->cur_heads && (id->cur_heads <= 16) && id->cur_sectors) {
drive->cyl = id->cur_cyls;
drive->head = id->cur_heads;
drive->sect = id->cur_sectors;
}
/* Use physical geometry if what we have still makes no sense */
if (drive->head > 16 && id->heads && id->heads <= 16) {
drive->cyl = id->cyls;
drive->head = id->heads;
drive->sect = id->sectors;
}
/* calculate drive capacity, and select LBA if possible */
init_idedisk_capacity (drive);
/*
* if possible, give fdisk access to more of the drive,
* by correcting bios_cyls:
*/
capacity = idedisk_capacity (drive);
if ((capacity >= (drive->bios_cyl * drive->bios_sect * drive->bios_head)) &&
(!drive->forced_geom) && drive->bios_sect && drive->bios_head)
drive->bios_cyl = (capacity / drive->bios_sect) / drive->bios_head;
printk (KERN_INFO "%s: %ld sectors", drive->name, capacity);
/* Give size in megabytes (MB), not mebibytes (MiB). */
/* We compute the exact rounded value, avoiding overflow. */
printk (" (%ld MB)", (capacity - capacity/625 + 974)/1950);
/* Only print cache size when it was specified */
if (id->buf_size)
printk (" w/%dKiB Cache", id->buf_size/2);
printk(", CHS=%d/%d/%d",
drive->bios_cyl, drive->bios_head, drive->bios_sect);
#ifdef CONFIG_BLK_DEV_IDEDMA
if (drive->using_dma)
(void) HWIF(drive)->dmaproc(ide_dma_verbose, drive);
#endif /* CONFIG_BLK_DEV_IDEDMA */
printk("\n");
drive->mult_count = 0;
if (id->max_multsect) {
#ifdef CONFIG_IDEDISK_MULTI_MODE
id->multsect = ((id->max_multsect/2) > 1) ? id->max_multsect : 0;
id->multsect_valid = id->multsect ? 1 : 0;
drive->mult_req = id->multsect_valid ? id->max_multsect : INITIAL_MULT_COUNT;
drive->special.b.set_multmode = drive->mult_req ? 1 : 0;
#else /* original, pre IDE-NFG, per request of AC */
drive->mult_req = INITIAL_MULT_COUNT;
if (drive->mult_req > id->max_multsect)
drive->mult_req = id->max_multsect;
if (drive->mult_req || ((id->multsect_valid & 1) && id->multsect))
drive->special.b.set_multmode = 1;
#endif
}
drive->no_io_32bit = id->dword_io ? 1 : 0;
}
static int idedisk_reinit (ide_drive_t *drive)
{
return 0;
}
static int idedisk_cleanup (ide_drive_t *drive)
{
return ide_unregister_subdriver(drive);
}
/*
* IDE subdriver functions, registered with ide.c
*/
static ide_driver_t idedisk_driver = {
name: "ide-disk",
version: IDEDISK_VERSION,
media: ide_disk,
busy: 0,
supports_dma: 1,
supports_dsc_overlap: 0,
cleanup: idedisk_cleanup,
do_request: do_rw_disk,
end_request: NULL,
ioctl: NULL,
open: idedisk_open,
release: idedisk_release,
media_change: idedisk_media_change,
revalidate: idedisk_revalidate,
pre_reset: idedisk_pre_reset,
capacity: idedisk_capacity,
special: idedisk_special,
proc: idedisk_proc,
driver_reinit: idedisk_reinit,
};
int idedisk_init (void);
static ide_module_t idedisk_module = {
IDE_DRIVER_MODULE,
idedisk_init,
&idedisk_driver,
NULL
};
MODULE_DESCRIPTION("ATA DISK Driver");
static void __exit idedisk_exit (void)
{
ide_drive_t *drive;
int failed = 0;
while ((drive = ide_scan_devices (ide_disk, idedisk_driver.name, &idedisk_driver, failed)) != NULL) {
if (idedisk_cleanup (drive)) {
printk (KERN_ERR "%s: cleanup_module() called while still busy\n", drive->name);
failed++;
}
/* We must remove proc entries defined in this module.
Otherwise we oops while accessing these entries */
#ifdef CONFIG_PROC_FS
if (drive->proc)
ide_remove_proc_entries(drive->proc, idedisk_proc);
#endif
}
ide_unregister_module(&idedisk_module);
}
int idedisk_init (void)
{
ide_drive_t *drive;
int failed = 0;
MOD_INC_USE_COUNT;
while ((drive = ide_scan_devices (ide_disk, idedisk_driver.name, NULL, failed++)) != NULL) {
if (ide_register_subdriver (drive, &idedisk_driver, IDE_SUBDRIVER_VERSION)) {
printk (KERN_ERR "ide-disk: %s: Failed to register the driver with ide.c\n", drive->name);
continue;
}
idedisk_setup(drive);
if ((!drive->head || drive->head > 16) && !drive->select.b.lba) {
printk(KERN_ERR "%s: INVALID GEOMETRY: %d PHYSICAL HEADS?\n", drive->name, drive->head);
(void) idedisk_cleanup(drive);
continue;
}
failed--;
}
ide_register_module(&idedisk_module);
MOD_DEC_USE_COUNT;
return 0;
}
module_init(idedisk_init);
module_exit(idedisk_exit);
MODULE_LICENSE("GPL");
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