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ide-disk.c
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ide-disk.c
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/*
* linux/drivers/ide/ide-disk.c Version 1.18 Mar 05, 2003
*
* Copyright (C) 1994-1998 Linus Torvalds & authors (see below)
* Copyright (C) 1998-2002 Linux ATA Development
* Andre Hedrick <[email protected]>
* Copyright (C) 2003 Red Hat <[email protected]>
*/
/*
* Mostly written by Mark Lord <[email protected]>
* and Gadi Oxman <[email protected]>
* and Andre Hedrick <[email protected]>
*
* 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
* Version 1.11 added 48-bit lba
* Version 1.12 adding taskfile io access method
* Version 1.13 added standby and flush-cache for notifier
* Version 1.14 added acoustic-wcache
* Version 1.15 convert all calls to ide_raw_taskfile
* since args will return register content.
* Version 1.16 added suspend-resume-checkpower
* Version 1.17 do flush on standby, do flush on ATA < ATA6
* fix wcache setup.
*/
#define IDEDISK_VERSION "1.18"
//#define DEBUG
#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/mutex.h>
#include <linux/leds.h>
#define _IDE_DISK
#include <linux/ide.h>
#include <asm/byteorder.h>
#include <asm/irq.h>
#include <asm/uaccess.h>
#include <asm/io.h>
#include <asm/div64.h>
struct ide_disk_obj {
ide_drive_t *drive;
ide_driver_t *driver;
struct gendisk *disk;
struct kref kref;
unsigned int openers; /* protected by BKL for now */
};
static DEFINE_MUTEX(idedisk_ref_mutex);
#define to_ide_disk(obj) container_of(obj, struct ide_disk_obj, kref)
#define ide_disk_g(disk) \
container_of((disk)->private_data, struct ide_disk_obj, driver)
static struct ide_disk_obj *ide_disk_get(struct gendisk *disk)
{
struct ide_disk_obj *idkp = NULL;
mutex_lock(&idedisk_ref_mutex);
idkp = ide_disk_g(disk);
if (idkp)
kref_get(&idkp->kref);
mutex_unlock(&idedisk_ref_mutex);
return idkp;
}
static void ide_disk_release(struct kref *);
static void ide_disk_put(struct ide_disk_obj *idkp)
{
mutex_lock(&idedisk_ref_mutex);
kref_put(&idkp->kref, ide_disk_release);
mutex_unlock(&idedisk_ref_mutex);
}
/*
* 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;
/* No non-LBA info .. so valid! */
if (id->cyls == 0)
return 1;
/*
* 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 */
}
/*
* __ide_do_rw_disk() issues READ and WRITE commands to a disk,
* using LBA if supported, or CHS otherwise, to address sectors.
*/
static ide_startstop_t __ide_do_rw_disk(ide_drive_t *drive, struct request *rq, sector_t block)
{
ide_hwif_t *hwif = HWIF(drive);
unsigned int dma = drive->using_dma;
u8 lba48 = (drive->addressing == 1) ? 1 : 0;
task_ioreg_t command = WIN_NOP;
ata_nsector_t nsectors;
nsectors.all = (u16) rq->nr_sectors;
if (hwif->no_lba48_dma && lba48 && dma) {
if (block + rq->nr_sectors > 1ULL << 28)
dma = 0;
else
lba48 = 0;
}
if (!dma) {
ide_init_sg_cmd(drive, rq);
ide_map_sg(drive, rq);
}
if (IDE_CONTROL_REG)
hwif->OUTB(drive->ctl, IDE_CONTROL_REG);
/* FIXME: SELECT_MASK(drive, 0) ? */
if (drive->select.b.lba) {
if (lba48) {
task_ioreg_t tasklets[10];
pr_debug("%s: LBA=0x%012llx\n", drive->name,
(unsigned long long)block);
tasklets[0] = 0;
tasklets[1] = 0;
tasklets[2] = nsectors.b.low;
tasklets[3] = nsectors.b.high;
tasklets[4] = (task_ioreg_t) block;
tasklets[5] = (task_ioreg_t) (block>>8);
tasklets[6] = (task_ioreg_t) (block>>16);
tasklets[7] = (task_ioreg_t) (block>>24);
if (sizeof(block) == 4) {
tasklets[8] = (task_ioreg_t) 0;
tasklets[9] = (task_ioreg_t) 0;
} else {
tasklets[8] = (task_ioreg_t)((u64)block >> 32);
tasklets[9] = (task_ioreg_t)((u64)block >> 40);
}
#ifdef DEBUG
printk("%s: 0x%02x%02x 0x%02x%02x%02x%02x%02x%02x\n",
drive->name, tasklets[3], tasklets[2],
tasklets[9], tasklets[8], tasklets[7],
tasklets[6], tasklets[5], tasklets[4]);
#endif
hwif->OUTB(tasklets[1], IDE_FEATURE_REG);
hwif->OUTB(tasklets[3], IDE_NSECTOR_REG);
hwif->OUTB(tasklets[7], IDE_SECTOR_REG);
hwif->OUTB(tasklets[8], IDE_LCYL_REG);
hwif->OUTB(tasklets[9], IDE_HCYL_REG);
hwif->OUTB(tasklets[0], IDE_FEATURE_REG);
hwif->OUTB(tasklets[2], IDE_NSECTOR_REG);
hwif->OUTB(tasklets[4], IDE_SECTOR_REG);
hwif->OUTB(tasklets[5], IDE_LCYL_REG);
hwif->OUTB(tasklets[6], IDE_HCYL_REG);
hwif->OUTB(0x00|drive->select.all,IDE_SELECT_REG);
} else {
hwif->OUTB(0x00, IDE_FEATURE_REG);
hwif->OUTB(nsectors.b.low, IDE_NSECTOR_REG);
hwif->OUTB(block, IDE_SECTOR_REG);
hwif->OUTB(block>>=8, IDE_LCYL_REG);
hwif->OUTB(block>>=8, IDE_HCYL_REG);
hwif->OUTB(((block>>8)&0x0f)|drive->select.all,IDE_SELECT_REG);
}
} else {
unsigned int sect,head,cyl,track;
track = (int)block / drive->sect;
sect = (int)block % drive->sect + 1;
hwif->OUTB(sect, IDE_SECTOR_REG);
head = track % drive->head;
cyl = track / drive->head;
pr_debug("%s: CHS=%u/%u/%u\n", drive->name, cyl, head, sect);
hwif->OUTB(0x00, IDE_FEATURE_REG);
hwif->OUTB(nsectors.b.low, IDE_NSECTOR_REG);
hwif->OUTB(cyl, IDE_LCYL_REG);
hwif->OUTB(cyl>>8, IDE_HCYL_REG);
hwif->OUTB(head|drive->select.all,IDE_SELECT_REG);
}
if (dma) {
if (!hwif->dma_setup(drive)) {
if (rq_data_dir(rq)) {
command = lba48 ? WIN_WRITEDMA_EXT : WIN_WRITEDMA;
if (drive->vdma)
command = lba48 ? WIN_WRITE_EXT: WIN_WRITE;
} else {
command = lba48 ? WIN_READDMA_EXT : WIN_READDMA;
if (drive->vdma)
command = lba48 ? WIN_READ_EXT: WIN_READ;
}
hwif->dma_exec_cmd(drive, command);
hwif->dma_start(drive);
return ide_started;
}
/* fallback to PIO */
ide_init_sg_cmd(drive, rq);
}
if (rq_data_dir(rq) == READ) {
if (drive->mult_count) {
hwif->data_phase = TASKFILE_MULTI_IN;
command = lba48 ? WIN_MULTREAD_EXT : WIN_MULTREAD;
} else {
hwif->data_phase = TASKFILE_IN;
command = lba48 ? WIN_READ_EXT : WIN_READ;
}
ide_execute_command(drive, command, &task_in_intr, WAIT_CMD, NULL);
return ide_started;
} else {
if (drive->mult_count) {
hwif->data_phase = TASKFILE_MULTI_OUT;
command = lba48 ? WIN_MULTWRITE_EXT : WIN_MULTWRITE;
} else {
hwif->data_phase = TASKFILE_OUT;
command = lba48 ? WIN_WRITE_EXT : WIN_WRITE;
}
/* FIXME: ->OUTBSYNC ? */
hwif->OUTB(command, IDE_COMMAND_REG);
return pre_task_out_intr(drive, rq);
}
}
/*
* 268435455 == 137439 MB or 28bit limit
* 320173056 == 163929 MB or 48bit addressing
* 1073741822 == 549756 MB or 48bit addressing fake drive
*/
static ide_startstop_t ide_do_rw_disk (ide_drive_t *drive, struct request *rq, sector_t block)
{
ide_hwif_t *hwif = HWIF(drive);
BUG_ON(drive->blocked);
if (!blk_fs_request(rq)) {
blk_dump_rq_flags(rq, "ide_do_rw_disk - bad command");
ide_end_request(drive, 0, 0);
return ide_stopped;
}
ledtrig_ide_activity();
pr_debug("%s: %sing: block=%llu, sectors=%lu, buffer=0x%08lx\n",
drive->name, rq_data_dir(rq) == READ ? "read" : "writ",
(unsigned long long)block, rq->nr_sectors,
(unsigned long)rq->buffer);
if (hwif->rw_disk)
hwif->rw_disk(drive, rq);
return __ide_do_rw_disk(drive, rq, block);
}
/*
* Queries for true maximum capacity of the drive.
* Returns maximum LBA address (> 0) of the drive, 0 if failed.
*/
static unsigned long idedisk_read_native_max_address(ide_drive_t *drive)
{
ide_task_t args;
unsigned long addr = 0;
/* Create IDE/ATA command request structure */
memset(&args, 0, sizeof(ide_task_t));
args.tfRegister[IDE_SELECT_OFFSET] = 0x40;
args.tfRegister[IDE_COMMAND_OFFSET] = WIN_READ_NATIVE_MAX;
args.command_type = IDE_DRIVE_TASK_NO_DATA;
args.handler = &task_no_data_intr;
/* submit command request */
ide_raw_taskfile(drive, &args, NULL);
/* if OK, compute maximum address value */
if ((args.tfRegister[IDE_STATUS_OFFSET] & 0x01) == 0) {
addr = ((args.tfRegister[IDE_SELECT_OFFSET] & 0x0f) << 24)
| ((args.tfRegister[ IDE_HCYL_OFFSET] ) << 16)
| ((args.tfRegister[ IDE_LCYL_OFFSET] ) << 8)
| ((args.tfRegister[IDE_SECTOR_OFFSET] ));
addr++; /* since the return value is (maxlba - 1), we add 1 */
}
return addr;
}
static unsigned long long idedisk_read_native_max_address_ext(ide_drive_t *drive)
{
ide_task_t args;
unsigned long long addr = 0;
/* Create IDE/ATA command request structure */
memset(&args, 0, sizeof(ide_task_t));
args.tfRegister[IDE_SELECT_OFFSET] = 0x40;
args.tfRegister[IDE_COMMAND_OFFSET] = WIN_READ_NATIVE_MAX_EXT;
args.command_type = IDE_DRIVE_TASK_NO_DATA;
args.handler = &task_no_data_intr;
/* submit command request */
ide_raw_taskfile(drive, &args, NULL);
/* if OK, compute maximum address value */
if ((args.tfRegister[IDE_STATUS_OFFSET] & 0x01) == 0) {
u32 high = (args.hobRegister[IDE_HCYL_OFFSET] << 16) |
(args.hobRegister[IDE_LCYL_OFFSET] << 8) |
args.hobRegister[IDE_SECTOR_OFFSET];
u32 low = ((args.tfRegister[IDE_HCYL_OFFSET])<<16) |
((args.tfRegister[IDE_LCYL_OFFSET])<<8) |
(args.tfRegister[IDE_SECTOR_OFFSET]);
addr = ((__u64)high << 24) | low;
addr++; /* since the return value is (maxlba - 1), we add 1 */
}
return addr;
}
/*
* Sets maximum virtual LBA address of the drive.
* Returns new maximum virtual LBA address (> 0) or 0 on failure.
*/
static unsigned long idedisk_set_max_address(ide_drive_t *drive, unsigned long addr_req)
{
ide_task_t args;
unsigned long addr_set = 0;
addr_req--;
/* Create IDE/ATA command request structure */
memset(&args, 0, sizeof(ide_task_t));
args.tfRegister[IDE_SECTOR_OFFSET] = ((addr_req >> 0) & 0xff);
args.tfRegister[IDE_LCYL_OFFSET] = ((addr_req >> 8) & 0xff);
args.tfRegister[IDE_HCYL_OFFSET] = ((addr_req >> 16) & 0xff);
args.tfRegister[IDE_SELECT_OFFSET] = ((addr_req >> 24) & 0x0f) | 0x40;
args.tfRegister[IDE_COMMAND_OFFSET] = WIN_SET_MAX;
args.command_type = IDE_DRIVE_TASK_NO_DATA;
args.handler = &task_no_data_intr;
/* submit command request */
ide_raw_taskfile(drive, &args, NULL);
/* if OK, read new maximum address value */
if ((args.tfRegister[IDE_STATUS_OFFSET] & 0x01) == 0) {
addr_set = ((args.tfRegister[IDE_SELECT_OFFSET] & 0x0f) << 24)
| ((args.tfRegister[ IDE_HCYL_OFFSET] ) << 16)
| ((args.tfRegister[ IDE_LCYL_OFFSET] ) << 8)
| ((args.tfRegister[IDE_SECTOR_OFFSET] ));
addr_set++;
}
return addr_set;
}
static unsigned long long idedisk_set_max_address_ext(ide_drive_t *drive, unsigned long long addr_req)
{
ide_task_t args;
unsigned long long addr_set = 0;
addr_req--;
/* Create IDE/ATA command request structure */
memset(&args, 0, sizeof(ide_task_t));
args.tfRegister[IDE_SECTOR_OFFSET] = ((addr_req >> 0) & 0xff);
args.tfRegister[IDE_LCYL_OFFSET] = ((addr_req >>= 8) & 0xff);
args.tfRegister[IDE_HCYL_OFFSET] = ((addr_req >>= 8) & 0xff);
args.tfRegister[IDE_SELECT_OFFSET] = 0x40;
args.tfRegister[IDE_COMMAND_OFFSET] = WIN_SET_MAX_EXT;
args.hobRegister[IDE_SECTOR_OFFSET] = (addr_req >>= 8) & 0xff;
args.hobRegister[IDE_LCYL_OFFSET] = (addr_req >>= 8) & 0xff;
args.hobRegister[IDE_HCYL_OFFSET] = (addr_req >>= 8) & 0xff;
args.hobRegister[IDE_SELECT_OFFSET] = 0x40;
args.hobRegister[IDE_CONTROL_OFFSET_HOB]= (drive->ctl|0x80);
args.command_type = IDE_DRIVE_TASK_NO_DATA;
args.handler = &task_no_data_intr;
/* submit command request */
ide_raw_taskfile(drive, &args, NULL);
/* if OK, compute maximum address value */
if ((args.tfRegister[IDE_STATUS_OFFSET] & 0x01) == 0) {
u32 high = (args.hobRegister[IDE_HCYL_OFFSET] << 16) |
(args.hobRegister[IDE_LCYL_OFFSET] << 8) |
args.hobRegister[IDE_SECTOR_OFFSET];
u32 low = ((args.tfRegister[IDE_HCYL_OFFSET])<<16) |
((args.tfRegister[IDE_LCYL_OFFSET])<<8) |
(args.tfRegister[IDE_SECTOR_OFFSET]);
addr_set = ((__u64)high << 24) | low;
addr_set++;
}
return addr_set;
}
static unsigned long long sectors_to_MB(unsigned long long n)
{
n <<= 9; /* make it bytes */
do_div(n, 1000000); /* make it MB */
return n;
}
/*
* Bits 10 of command_set_1 and cfs_enable_1 must be equal,
* so on non-buggy drives we need test only one.
* However, we should also check whether these fields are valid.
*/
static inline int idedisk_supports_hpa(const struct hd_driveid *id)
{
return (id->command_set_1 & 0x0400) && (id->cfs_enable_1 & 0x0400);
}
/*
* The same here.
*/
static inline int idedisk_supports_lba48(const struct hd_driveid *id)
{
return (id->command_set_2 & 0x0400) && (id->cfs_enable_2 & 0x0400)
&& id->lba_capacity_2;
}
static void idedisk_check_hpa(ide_drive_t *drive)
{
unsigned long long capacity, set_max;
int lba48 = idedisk_supports_lba48(drive->id);
capacity = drive->capacity64;
if (lba48)
set_max = idedisk_read_native_max_address_ext(drive);
else
set_max = idedisk_read_native_max_address(drive);
if (set_max <= capacity)
return;
printk(KERN_INFO "%s: Host Protected Area detected.\n"
"\tcurrent capacity is %llu sectors (%llu MB)\n"
"\tnative capacity is %llu sectors (%llu MB)\n",
drive->name,
capacity, sectors_to_MB(capacity),
set_max, sectors_to_MB(set_max));
if (lba48)
set_max = idedisk_set_max_address_ext(drive, set_max);
else
set_max = idedisk_set_max_address(drive, set_max);
if (set_max) {
drive->capacity64 = set_max;
printk(KERN_INFO "%s: Host Protected Area disabled.\n",
drive->name);
}
}
/*
* Compute drive->capacity, the full capacity of the drive
* Called with drive->id != NULL.
*
* To compute capacity, this uses either of
*
* 1. CHS value set by user (whatever user sets will be trusted)
* 2. LBA value from target drive (require new ATA feature)
* 3. LBA value from system BIOS (new one is OK, old one may break)
* 4. CHS value from system BIOS (traditional style)
*
* in above order (i.e., if value of higher priority is available,
* reset will be ignored).
*/
static void init_idedisk_capacity (ide_drive_t *drive)
{
struct hd_driveid *id = drive->id;
/*
* If this drive supports the Host Protected Area feature set,
* then we may need to change our opinion about the drive's capacity.
*/
int hpa = idedisk_supports_hpa(id);
if (idedisk_supports_lba48(id)) {
/* drive speaks 48-bit LBA */
drive->select.b.lba = 1;
drive->capacity64 = id->lba_capacity_2;
if (hpa)
idedisk_check_hpa(drive);
} else if ((id->capability & 2) && lba_capacity_is_ok(id)) {
/* drive speaks 28-bit LBA */
drive->select.b.lba = 1;
drive->capacity64 = id->lba_capacity;
if (hpa)
idedisk_check_hpa(drive);
} else {
/* drive speaks boring old 28-bit CHS */
drive->capacity64 = drive->cyl * drive->head * drive->sect;
}
}
static sector_t idedisk_capacity (ide_drive_t *drive)
{
return drive->capacity64 - drive->sect0;
}
#ifdef CONFIG_IDE_PROC_FS
static int smart_enable(ide_drive_t *drive)
{
ide_task_t args;
memset(&args, 0, sizeof(ide_task_t));
args.tfRegister[IDE_FEATURE_OFFSET] = SMART_ENABLE;
args.tfRegister[IDE_LCYL_OFFSET] = SMART_LCYL_PASS;
args.tfRegister[IDE_HCYL_OFFSET] = SMART_HCYL_PASS;
args.tfRegister[IDE_COMMAND_OFFSET] = WIN_SMART;
args.command_type = IDE_DRIVE_TASK_NO_DATA;
args.handler = &task_no_data_intr;
return ide_raw_taskfile(drive, &args, NULL);
}
static int get_smart_values(ide_drive_t *drive, u8 *buf)
{
ide_task_t args;
memset(&args, 0, sizeof(ide_task_t));
args.tfRegister[IDE_FEATURE_OFFSET] = SMART_READ_VALUES;
args.tfRegister[IDE_NSECTOR_OFFSET] = 0x01;
args.tfRegister[IDE_LCYL_OFFSET] = SMART_LCYL_PASS;
args.tfRegister[IDE_HCYL_OFFSET] = SMART_HCYL_PASS;
args.tfRegister[IDE_COMMAND_OFFSET] = WIN_SMART;
args.command_type = IDE_DRIVE_TASK_IN;
args.data_phase = TASKFILE_IN;
args.handler = &task_in_intr;
(void) smart_enable(drive);
return ide_raw_taskfile(drive, &args, buf);
}
static int get_smart_thresholds(ide_drive_t *drive, u8 *buf)
{
ide_task_t args;
memset(&args, 0, sizeof(ide_task_t));
args.tfRegister[IDE_FEATURE_OFFSET] = SMART_READ_THRESHOLDS;
args.tfRegister[IDE_NSECTOR_OFFSET] = 0x01;
args.tfRegister[IDE_LCYL_OFFSET] = SMART_LCYL_PASS;
args.tfRegister[IDE_HCYL_OFFSET] = SMART_HCYL_PASS;
args.tfRegister[IDE_COMMAND_OFFSET] = WIN_SMART;
args.command_type = IDE_DRIVE_TASK_IN;
args.data_phase = TASKFILE_IN;
args.handler = &task_in_intr;
(void) smart_enable(drive);
return ide_raw_taskfile(drive, &args, 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_read)
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_capacity
(char *page, char **start, off_t off, int count, int *eof, void *data)
{
ide_drive_t*drive = (ide_drive_t *)data;
int len;
len = sprintf(page,"%llu\n", (long long)idedisk_capacity(drive));
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;
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;
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 },
{ "capacity", S_IFREG|S_IRUGO, proc_idedisk_read_capacity, 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 }
};
#endif /* CONFIG_IDE_PROC_FS */
static void idedisk_prepare_flush(request_queue_t *q, struct request *rq)
{
ide_drive_t *drive = q->queuedata;
memset(rq->cmd, 0, sizeof(rq->cmd));
if (ide_id_has_flush_cache_ext(drive->id) &&
(drive->capacity64 >= (1UL << 28)))
rq->cmd[0] = WIN_FLUSH_CACHE_EXT;
else
rq->cmd[0] = WIN_FLUSH_CACHE;
rq->cmd_type = REQ_TYPE_ATA_TASK;
rq->cmd_flags |= REQ_SOFTBARRIER;
rq->buffer = rq->cmd;
}
static int idedisk_issue_flush(request_queue_t *q, struct gendisk *disk,
sector_t *error_sector)
{
ide_drive_t *drive = q->queuedata;
struct request *rq;
int ret;
if (!drive->wcache)
return 0;
rq = blk_get_request(q, WRITE, __GFP_WAIT);
idedisk_prepare_flush(q, rq);
ret = blk_execute_rq(q, disk, rq, 0);
/*
* if we failed and caller wants error offset, get it
*/
if (ret && error_sector)
*error_sector = ide_get_error_location(drive, rq->cmd);
blk_put_request(rq);
return ret;
}
/*
* This is tightly woven into the driver->do_special can not touch.
* DON'T do it again until a total personality rewrite is committed.
*/
static int set_multcount(ide_drive_t *drive, int arg)
{
struct request rq;
if (arg < 0 || arg > drive->id->max_multsect)
return -EINVAL;
if (drive->special.b.set_multmode)
return -EBUSY;
ide_init_drive_cmd (&rq);
rq.cmd_type = REQ_TYPE_ATA_CMD;
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 (arg < 0 || arg > 1)
return -EINVAL;
if (ide_spin_wait_hwgroup(drive))
return -EBUSY;
drive->nowerr = arg;
drive->bad_wstat = arg ? BAD_R_STAT : BAD_W_STAT;
spin_unlock_irq(&ide_lock);
return 0;
}
static void update_ordered(ide_drive_t *drive)
{
struct hd_driveid *id = drive->id;
unsigned ordered = QUEUE_ORDERED_NONE;
prepare_flush_fn *prep_fn = NULL;
issue_flush_fn *issue_fn = NULL;
if (drive->wcache) {
unsigned long long capacity;
int barrier;
/*
* We must avoid issuing commands a drive does not
* understand or we may crash it. We check flush cache
* is supported. We also check we have the LBA48 flush
* cache if the drive capacity is too large. By this
* time we have trimmed the drive capacity if LBA48 is
* not available so we don't need to recheck that.
*/
capacity = idedisk_capacity(drive);
barrier = ide_id_has_flush_cache(id) && !drive->noflush &&
(drive->addressing == 0 || capacity <= (1ULL << 28) ||
ide_id_has_flush_cache_ext(id));
printk(KERN_INFO "%s: cache flushes %ssupported\n",
drive->name, barrier ? "" : "not ");
if (barrier) {
ordered = QUEUE_ORDERED_DRAIN_FLUSH;
prep_fn = idedisk_prepare_flush;
issue_fn = idedisk_issue_flush;
}
} else
ordered = QUEUE_ORDERED_DRAIN;
blk_queue_ordered(drive->queue, ordered, prep_fn);
blk_queue_issue_flush_fn(drive->queue, issue_fn);
}
static int write_cache(ide_drive_t *drive, int arg)
{
ide_task_t args;
int err = 1;
if (arg < 0 || arg > 1)
return -EINVAL;
if (ide_id_has_flush_cache(drive->id)) {
memset(&args, 0, sizeof(ide_task_t));
args.tfRegister[IDE_FEATURE_OFFSET] = (arg) ?
SETFEATURES_EN_WCACHE : SETFEATURES_DIS_WCACHE;
args.tfRegister[IDE_COMMAND_OFFSET] = WIN_SETFEATURES;
args.command_type = IDE_DRIVE_TASK_NO_DATA;
args.handler = &task_no_data_intr;
err = ide_raw_taskfile(drive, &args, NULL);
if (err == 0)
drive->wcache = arg;
}
update_ordered(drive);
return err;
}
static int do_idedisk_flushcache (ide_drive_t *drive)
{
ide_task_t args;
memset(&args, 0, sizeof(ide_task_t));
if (ide_id_has_flush_cache_ext(drive->id))
args.tfRegister[IDE_COMMAND_OFFSET] = WIN_FLUSH_CACHE_EXT;
else
args.tfRegister[IDE_COMMAND_OFFSET] = WIN_FLUSH_CACHE;
args.command_type = IDE_DRIVE_TASK_NO_DATA;
args.handler = &task_no_data_intr;
return ide_raw_taskfile(drive, &args, NULL);
}
static int set_acoustic (ide_drive_t *drive, int arg)
{
ide_task_t args;
if (arg < 0 || arg > 254)
return -EINVAL;
memset(&args, 0, sizeof(ide_task_t));
args.tfRegister[IDE_FEATURE_OFFSET] = (arg) ? SETFEATURES_EN_AAM :
SETFEATURES_DIS_AAM;
args.tfRegister[IDE_NSECTOR_OFFSET] = arg;
args.tfRegister[IDE_COMMAND_OFFSET] = WIN_SETFEATURES;
args.command_type = IDE_DRIVE_TASK_NO_DATA;
args.handler = &task_no_data_intr;
ide_raw_taskfile(drive, &args, NULL);
drive->acoustic = arg;
return 0;
}
/*
* drive->addressing:
* 0: 28-bit
* 1: 48-bit
* 2: 48-bit capable doing 28-bit
*/
static int set_lba_addressing(ide_drive_t *drive, int arg)
{
if (arg < 0 || arg > 2)
return -EINVAL;
drive->addressing = 0;
if (HWIF(drive)->no_lba48)
return 0;
if (!idedisk_supports_lba48(drive->id))
return -EIO;
drive->addressing = arg;
return 0;
}
#ifdef CONFIG_IDE_PROC_FS
static void idedisk_add_settings(ide_drive_t *drive)
{
struct hd_driveid *id = drive->id;
ide_add_setting(drive, "bios_cyl", SETTING_RW, TYPE_INT, 0, 65535, 1, 1, &drive->bios_cyl, NULL);
ide_add_setting(drive, "bios_head", SETTING_RW, TYPE_BYTE, 0, 255, 1, 1, &drive->bios_head, NULL);
ide_add_setting(drive, "bios_sect", SETTING_RW, TYPE_BYTE, 0, 63, 1, 1, &drive->bios_sect, NULL);
ide_add_setting(drive, "address", SETTING_RW, TYPE_BYTE, 0, 2, 1, 1, &drive->addressing, set_lba_addressing);
ide_add_setting(drive, "bswap", SETTING_READ, TYPE_BYTE, 0, 1, 1, 1, &drive->bswap, NULL);
ide_add_setting(drive, "multcount", SETTING_RW, TYPE_BYTE, 0, id->max_multsect, 1, 1, &drive->mult_count, set_multcount);
ide_add_setting(drive, "nowerr", SETTING_RW, TYPE_BYTE, 0, 1, 1, 1, &drive->nowerr, set_nowerr);
ide_add_setting(drive, "lun", SETTING_RW, TYPE_INT, 0, 7, 1, 1, &drive->lun, NULL);
ide_add_setting(drive, "wcache", SETTING_RW, TYPE_BYTE, 0, 1, 1, 1, &drive->wcache, write_cache);
ide_add_setting(drive, "acoustic", SETTING_RW, TYPE_BYTE, 0, 254, 1, 1, &drive->acoustic, set_acoustic);
ide_add_setting(drive, "failures", SETTING_RW, TYPE_INT, 0, 65535, 1, 1, &drive->failures, NULL);
ide_add_setting(drive, "max_failures", SETTING_RW, TYPE_INT, 0, 65535, 1, 1, &drive->max_failures, NULL);
}
#else
static inline void idedisk_add_settings(ide_drive_t *drive) { ; }
#endif
static void idedisk_setup (ide_drive_t *drive)
{
struct hd_driveid *id = drive->id;
unsigned long long capacity;
idedisk_add_settings(drive);
if (drive->id_read == 0)
return;
if (drive->removable) {
/*
* Removable disks (eg. SYQUEST); ignore 'WD' drives
*/
if (id->model[0] != 'W' || id->model[1] != 'D') {
drive->doorlocking = 1;
}
}
(void)set_lba_addressing(drive, 1);
if (drive->addressing == 1) {
ide_hwif_t *hwif = HWIF(drive);
int max_s = 2048;
if (max_s > hwif->rqsize)
max_s = hwif->rqsize;
blk_queue_max_sectors(drive->queue, max_s);
}
printk(KERN_INFO "%s: max request size: %dKiB\n", drive->name, drive->queue->max_sectors / 2);
/* calculate drive capacity, and select LBA if possible */
init_idedisk_capacity (drive);
/* limit drive capacity to 137GB if LBA48 cannot be used */
if (drive->addressing == 0 && drive->capacity64 > 1ULL << 28) {
printk(KERN_WARNING "%s: cannot use LBA48 - full capacity "
"%llu sectors (%llu MB)\n",
drive->name, (unsigned long long)drive->capacity64,
sectors_to_MB(drive->capacity64));
drive->capacity64 = 1ULL << 28;
}
if (drive->hwif->no_lba48_dma && drive->addressing) {
if (drive->capacity64 > 1ULL << 28) {
printk(KERN_INFO "%s: cannot use LBA48 DMA - PIO mode will"
" be used for accessing sectors > %u\n",
drive->name, 1 << 28);
} else
drive->addressing = 0;
}
/*
* if possible, give fdisk access to more of the drive,
* by correcting bios_cyls:
*/
capacity = idedisk_capacity (drive);
if (!drive->forced_geom) {
if (idedisk_supports_lba48(drive->id)) {
/* compatibility */
drive->bios_sect = 63;
drive->bios_head = 255;
}
if (drive->bios_sect && drive->bios_head) {
unsigned int cap0 = capacity; /* truncate to 32 bits */
unsigned int cylsz, cyl;
if (cap0 != capacity)
drive->bios_cyl = 65535;
else {
cylsz = drive->bios_sect * drive->bios_head;
cyl = cap0 / cylsz;
if (cyl > 65535)
cyl = 65535;
if (cyl > drive->bios_cyl)
drive->bios_cyl = cyl;
}
}
}
printk(KERN_INFO "%s: %llu sectors (%llu MB)",
drive->name, capacity, sectors_to_MB(capacity));
/* 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);
if (drive->using_dma)
ide_dma_verbose(drive);
printk("\n");
/* write cache enabled? */
if ((id->csfo & 1) || (id->cfs_enable_1 & (1 << 5)))
drive->wcache = 1;
write_cache(drive, 1);