/*
* 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 <andre@linux-ide.org>
* Copyright (C) 2003 Red Hat <alan@redhat.com>
*/
/*
* 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
* 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 standy, do flush on ATA < ATA6
* fix wcache setup.
*/
#define IDEDISK_VERSION "1.18"
#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>
#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>
/* FIXME: some day we shouldn't need to look in here! */
#include "legacy/pdc4030.h"
/*
* 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 */
}
static int idedisk_start_tag(ide_drive_t *drive, struct request *rq)
{
unsigned long flags;
int ret = 1;
spin_lock_irqsave(&ide_lock, flags);
if (ata_pending_commands(drive) < drive->queue_depth)
ret = blk_queue_start_tag(drive->queue, rq);
spin_unlock_irqrestore(&ide_lock, flags);
return ret;
}
#ifndef CONFIG_IDE_TASKFILE_IO
/*
* read_intr() is the handler for disk read/multread interrupts
*/
static ide_startstop_t read_intr (ide_drive_t *drive)
{
ide_hwif_t *hwif = HWIF(drive);
u32 i = 0, nsect = 0, msect = drive->mult_count;
struct request *rq;
unsigned long flags;
u8 stat;
char *to;
/* new way for dealing with premature shared PCI interrupts */
if (!OK_STAT(stat=hwif->INB(IDE_STATUS_REG),DATA_READY,BAD_R_STAT)) {
if (stat & (ERR_STAT|DRQ_STAT)) {
return DRIVER(drive)->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;
}
read_next:
rq = HWGROUP(drive)->rq;
if (msect) {
if ((nsect = rq->current_nr_sectors) > msect)
nsect = msect;
msect -= nsect;
} else
nsect = 1;
to = ide_map_buffer(rq, &flags);
taskfile_input_data(drive, to, 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
ide_unmap_buffer(rq, to, &flags);
rq->sector += nsect;
rq->errors = 0;
i = (rq->nr_sectors -= nsect);
if (((long)(rq->current_nr_sectors -= nsect)) <= 0)
ide_end_request(drive, 1, rq->hard_cur_sectors);
/*
* Another BH Page walker and DATA INTEGRITY Questioned on ERROR.
* If passed back up on multimode read, BAD DATA could be ACKED
* to FILE SYSTEMS above ...
*/
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)
{
ide_hwgroup_t *hwgroup = HWGROUP(drive);
ide_hwif_t *hwif = HWIF(drive);
struct request *rq = hwgroup->rq;
u32 i = 0;
u8 stat;
if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG),
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->errors = 0;
i = --rq->nr_sectors;
--rq->current_nr_sectors;
if (((long)rq->current_nr_sectors) <= 0)
ide_end_request(drive, 1, rq->hard_cur_sectors);
if (i > 0) {
unsigned long flags;
char *to = ide_map_buffer(rq, &flags);
taskfile_output_data(drive, to, SECTOR_WORDS);
ide_unmap_buffer(rq, to, &flags);
ide_set_handler(drive, &write_intr, WAIT_CMD, NULL);
return ide_started;
}
return ide_stopped;
}
/* the original code did this here (?) */
return ide_stopped;
}
return DRIVER(drive)->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.
*
* Note that we may be called from two contexts - __ide_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!
*
* The update and return to BH is a BLOCK Layer Fakey to get more data
* to satisfy the hardware atomic segment. If the hardware atomic segment
* is shorter or smaller than the BH segment then we should be OKAY.
* This is only valid if we can rewind the rq->current_nr_sectors counter.
*/
static void 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;
unsigned long flags;
if (nsect > mcount)
nsect = mcount;
mcount -= nsect;
buffer = ide_map_buffer(rq, &flags);
rq->sector += nsect;
rq->nr_sectors -= nsect;
rq->current_nr_sectors -= nsect;
/* Do we move to the next bh after this? */
if (!rq->current_nr_sectors) {
struct bio *bio = rq->bio;
/*
* only move to next bio, when we have processed
* all bvecs in this one.
*/
if (++bio->bi_idx >= bio->bi_vcnt) {
bio->bi_idx = bio->bi_vcnt - rq->nr_cbio_segments;
bio = bio->bi_next;
}
/* end early early we ran out of requests */
if (!bio) {
mcount = 0;
} else {
rq->bio = bio;
rq->nr_cbio_segments = bio_segments(bio);
rq->current_nr_sectors = bio_cur_sectors(bio);
rq->hard_cur_sectors = rq->current_nr_sectors;
}
}
/*
* Ok, we're all setup for the interrupt
* re-entering us on the last transfer.
*/
taskfile_output_data(drive, buffer, nsect<<7);
ide_unmap_buffer(rq, buffer, &flags);
} while (mcount);
}
/*
* multwrite_intr() is the handler for disk multwrite interrupts
*/
static ide_startstop_t multwrite_intr (ide_drive_t *drive)
{
ide_hwgroup_t *hwgroup = HWGROUP(drive);
ide_hwif_t *hwif = HWIF(drive);
struct request *rq = &hwgroup->wrq;
struct bio *bio = rq->bio;
u8 stat;
stat = hwif->INB(IDE_STATUS_REG);
if (OK_STAT(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) {
ide_multwrite(drive, drive->mult_count);
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? */
bio->bi_idx = bio->bi_vcnt - rq->nr_cbio_segments;
rq = hwgroup->rq;
ide_end_request(drive, 1, rq->nr_sectors);
return ide_stopped;
}
}
bio->bi_idx = bio->bi_vcnt - rq->nr_cbio_segments;
/* the original code did this here (?) */
return ide_stopped;
}
bio->bi_idx = bio->bi_vcnt - rq->nr_cbio_segments;
return DRIVER(drive)->error(drive, "multwrite_intr", stat);
}
/*
* __ide_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.
*/
ide_startstop_t __ide_do_rw_disk (ide_drive_t *drive, struct request *rq, sector_t block)
{
ide_hwif_t *hwif = HWIF(drive);
u8 lba48 = (drive->addressing == 1) ? 1 : 0;
task_ioreg_t command = WIN_NOP;
ata_nsector_t nsectors;
nsectors.all = (u16) rq->nr_sectors;
if (drive->using_tcq && idedisk_start_tag(drive, rq)) {
if (!ata_pending_commands(drive))
BUG();
return ide_started;
}
if (IDE_CONTROL_REG)
hwif->OUTB(drive->ctl, IDE_CONTROL_REG);
if (drive->select.b.lba) {
if (drive->addressing == 1) {
task_ioreg_t tasklets[10];
if (blk_rq_tagged(rq)) {
tasklets[0] = nsectors.b.low;
tasklets[1] = nsectors.b.high;
tasklets[2] = rq->tag << 3;
tasklets[3] = 0;
} else {
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: %sing: LBAsect=%lu, sectors=%ld, "
"buffer=0x%08lx, LBAsect=0x%012lx\n",
drive->name,
rq_data_dir(rq)==READ?"read":"writ",
block,
rq->nr_sectors,
(unsigned long) rq->buffer,
block);
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 {
#ifdef DEBUG
printk("%s: %sing: LBAsect=%llu, sectors=%ld, "
"buffer=0x%08lx\n",
drive->name,
rq_data_dir(rq)==READ?"read":"writ",
(unsigned long long)block, rq->nr_sectors,
(unsigned long) rq->buffer);
#endif
if (blk_rq_tagged(rq)) {
hwif->OUTB(nsectors.b.low, IDE_FEATURE_REG);
hwif->OUTB(rq->tag << 3, IDE_NSECTOR_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;
if (blk_rq_tagged(rq)) {
hwif->OUTB(nsectors.b.low, IDE_FEATURE_REG);
hwif->OUTB(rq->tag << 3, IDE_NSECTOR_REG);
} else {
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);
#ifdef DEBUG
printk("%s: %sing: CHS=%d/%d/%d, sectors=%ld, buffer=0x%08lx\n",
drive->name, rq_data_dir(rq)==READ?"read":"writ", cyl,
head, sect, rq->nr_sectors, (unsigned long) rq->buffer);
#endif
}
if (rq_data_dir(rq) == READ) {
#ifdef CONFIG_BLK_DEV_IDE_TCQ
if (blk_rq_tagged(rq))
return __ide_dma_queued_read(drive);
#endif
if (drive->using_dma && !hwif->ide_dma_read(drive))
return ide_started;
command = ((drive->mult_count) ?
((lba48) ? WIN_MULTREAD_EXT : WIN_MULTREAD) :
((lba48) ? WIN_READ_EXT : WIN_READ));
ide_execute_command(drive, command, &read_intr, WAIT_CMD, NULL);
return ide_started;
} else if (rq_data_dir(rq) == WRITE) {
ide_startstop_t startstop;
#ifdef CONFIG_BLK_DEV_IDE_TCQ
if (blk_rq_tagged(rq))
return __ide_dma_queued_write(drive);
#endif
if (drive->using_dma && !(HWIF(drive)->ide_dma_write(drive)))
return ide_started;
command = ((drive->mult_count) ?
((lba48) ? WIN_MULTWRITE_EXT : WIN_MULTWRITE) :
((lba48) ? WIN_WRITE_EXT : WIN_WRITE));
hwif->OUTB(command, 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)
local_irq_disable();
if (drive->mult_count) {
ide_hwgroup_t *hwgroup = HWGROUP(drive);
hwgroup->wrq = *rq; /* scratchpad */
ide_set_handler(drive, &multwrite_intr, WAIT_CMD, NULL);
ide_multwrite(drive, drive->mult_count);
} else {
unsigned long flags;
char *to = ide_map_buffer(rq, &flags);
ide_set_handler(drive, &write_intr, WAIT_CMD, NULL);
taskfile_output_data(drive, to, SECTOR_WORDS);
ide_unmap_buffer(rq, to, &flags);
}
return ide_started;
}
blk_dump_rq_flags(rq, "__ide_do_rw_disk - bad command");
ide_end_request(drive, 0, 0);
return ide_stopped;
}
EXPORT_SYMBOL_GPL(__ide_do_rw_disk);
#else /* CONFIG_IDE_TASKFILE_IO */
static ide_startstop_t chs_rw_disk(ide_drive_t *, struct request *, unsigned long);
static ide_startstop_t lba_28_rw_disk(ide_drive_t *, struct request *, unsigned long);
static ide_startstop_t lba_48_rw_disk(ide_drive_t *, struct request *, unsigned long long);
/*
* __ide_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.
*/
ide_startstop_t __ide_do_rw_disk (ide_drive_t *drive, struct request *rq, sector_t block)
{
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;
}
/*
* 268435455 == 137439 MB or 28bit limit
*
* need to add split taskfile operations based on 28bit threshold.
*/
if (drive->using_tcq && idedisk_start_tag(drive, rq)) {
if (!ata_pending_commands(drive))
BUG();
return ide_started;
}
if (drive->addressing == 1) /* 48-bit LBA */
return lba_48_rw_disk(drive, rq, (unsigned long long) block);
if (drive->select.b.lba) /* 28-bit LBA */
return lba_28_rw_disk(drive, rq, (unsigned long) block);
/* 28-bit CHS : DIE DIE DIE piece of legacy crap!!! */
return chs_rw_disk(drive, rq, (unsigned long) block);
}
EXPORT_SYMBOL_GPL(__ide_do_rw_disk);
static u8 get_command(ide_drive_t *drive, int cmd, ide_task_t *task)
{
unsigned int lba48 = (drive->addressing == 1) ? 1 : 0;
if (cmd == READ) {
task->command_type = IDE_DRIVE_TASK_IN;
if (drive->using_tcq)
return lba48 ? WIN_READDMA_QUEUED_EXT : WIN_READDMA_QUEUED;
if (drive->using_dma)
return lba48 ? WIN_READDMA_EXT : WIN_READDMA;
if (drive->mult_count) {
task->handler = &task_mulin_intr;
return lba48 ? WIN_MULTREAD_EXT : WIN_MULTREAD;
}
task->handler = &task_in_intr;
return lba48 ? WIN_READ_EXT : WIN_READ;
} else {
task->command_type = IDE_DRIVE_TASK_RAW_WRITE;
if (drive->using_tcq)
return lba48 ? WIN_WRITEDMA_QUEUED_EXT : WIN_WRITEDMA_QUEUED;
if (drive->using_dma)
return lba48 ? WIN_WRITEDMA_EXT : WIN_WRITEDMA;
if (drive->mult_count) {
task->prehandler = &pre_task_mulout_intr;
task->handler = &task_mulout_intr;
return lba48 ? WIN_MULTWRITE_EXT : WIN_MULTWRITE;
}
task->prehandler = &pre_task_out_intr;
task->handler = &task_out_intr;
return lba48 ? WIN_WRITE_EXT : WIN_WRITE;
}
}
static ide_startstop_t chs_rw_disk (ide_drive_t *drive, struct request *rq, unsigned long block)
{
ide_task_t args;
int sectors;
ata_nsector_t nsectors;
unsigned int track = (block / drive->sect);
unsigned int sect = (block % drive->sect) + 1;
unsigned int head = (track % drive->head);
unsigned int cyl = (track / drive->head);
nsectors.all = (u16) rq->nr_sectors;
#ifdef DEBUG
printk("%s: %sing: ", drive->name, (rq_data_dir(rq)==READ) ? "read" : "writ");
printk("CHS=%d/%d/%d, ", cyl, head, sect);
printk("sectors=%ld, ", rq->nr_sectors);
printk("buffer=0x%08lx\n", (unsigned long) rq->buffer);
#endif
memset(&args, 0, sizeof(ide_task_t));
sectors = (rq->nr_sectors == 256) ? 0x00 : rq->nr_sectors;
if (blk_rq_tagged(rq)) {
args.tfRegister[IDE_FEATURE_OFFSET] = sectors;
args.tfRegister[IDE_NSECTOR_OFFSET] = rq->tag << 3;
} else
args.tfRegister[IDE_NSECTOR_OFFSET] = sectors;
args.tfRegister[IDE_SECTOR_OFFSET] = sect;
args.tfRegister[IDE_LCYL_OFFSET] = cyl;
args.tfRegister[IDE_HCYL_OFFSET] = (cyl>>8);
args.tfRegister[IDE_SELECT_OFFSET] = head;
args.tfRegister[IDE_SELECT_OFFSET] |= drive->select.all;
args.tfRegister[IDE_COMMAND_OFFSET] = get_command(drive, rq_data_dir(rq), &args);
args.rq = (struct request *) rq;
rq->special = (ide_task_t *)&args;
return do_rw_taskfile(drive, &args);
}
static ide_startstop_t lba_28_rw_disk (ide_drive_t *drive, struct request *rq, unsigned long block)
{
ide_task_t args;
int sectors;
ata_nsector_t nsectors;
nsectors.all = (u16) rq->nr_sectors;
#ifdef DEBUG
printk("%s: %sing: ", drive->name, (rq_data_dir(rq)==READ) ? "read" : "writ");
printk("LBAsect=%lld, ", block);
printk("sectors=%ld, ", rq->nr_sectors);
printk("buffer=0x%08lx\n", (unsigned long) rq->buffer);
#endif
memset(&args, 0, sizeof(ide_task_t));
sectors = (rq->nr_sectors == 256) ? 0x00 : rq->nr_sectors;
if (blk_rq_tagged(rq)) {
args.tfRegister[IDE_FEATURE_OFFSET] = sectors;
args.tfRegister[IDE_NSECTOR_OFFSET] = rq->tag << 3;
} else
args.tfRegister[IDE_NSECTOR_OFFSET] = sectors;
args.tfRegister[IDE_SECTOR_OFFSET] = block;
args.tfRegister[IDE_LCYL_OFFSET] = (block>>=8);
args.tfRegister[IDE_HCYL_OFFSET] = (block>>=8);
args.tfRegister[IDE_SELECT_OFFSET] = ((block>>8)&0x0f);
args.tfRegister[IDE_SELECT_OFFSET] |= drive->select.all;
args.tfRegister[IDE_COMMAND_OFFSET] = get_command(drive, rq_data_dir(rq), &args);
args.rq = (struct request *) rq;
rq->special = (ide_task_t *)&args;
return do_rw_taskfile(drive, &args);
}
/*
* 268435455 == 137439 MB or 28bit limit
* 320173056 == 163929 MB or 48bit addressing
* 1073741822 == 549756 MB or 48bit addressing fake drive
*/
static ide_startstop_t lba_48_rw_disk (ide_drive_t *drive, struct request *rq, unsigned long long block)
{
ide_task_t args;
int sectors;
ata_nsector_t nsectors;
nsectors.all = (u16) rq->nr_sectors;
#ifdef DEBUG
printk("%s: %sing: ", drive->name, (rq_data_dir(rq)==READ) ? "read" : "writ");
printk("LBAsect=%lld, ", block);
printk("sectors=%ld, ", rq->nr_sectors);
printk("buffer=0x%08lx\n", (unsigned long) rq->buffer);
#endif
memset(&args, 0, sizeof(ide_task_t));
sectors = (rq->nr_sectors == 65536) ? 0 : rq->nr_sectors;
if (blk_rq_tagged(rq)) {
args.tfRegister[IDE_FEATURE_OFFSET] = sectors;
args.tfRegister[IDE_NSECTOR_OFFSET] = rq->tag << 3;
args.hobRegister[IDE_FEATURE_OFFSET] = sectors >> 8;
args.hobRegister[IDE_NSECTOR_OFFSET] = 0;
} else {
args.tfRegister[IDE_NSECTOR_OFFSET] = sectors;
args.hobRegister[IDE_NSECTOR_OFFSET] = sectors >> 8;
}
args.tfRegister[IDE_SECTOR_OFFSET] = block; /* low lba */
args.tfRegister[IDE_LCYL_OFFSET] = (block>>=8); /* mid lba */
args.tfRegister[IDE_HCYL_OFFSET] = (block>>=8); /* hi lba */
args.tfRegister[IDE_SELECT_OFFSET] = drive->select.all;
args.tfRegister[IDE_COMMAND_OFFSET] = get_command(drive, rq_data_dir(rq), &args);
args.hobRegister[IDE_SECTOR_OFFSET] = (block>>=8); /* low lba */
args.hobRegister[IDE_LCYL_OFFSET] = (block>>=8); /* mid lba */
args.hobRegister[IDE_HCYL_OFFSET] = (block>>=8); /* hi lba */
args.hobRegister[IDE_SELECT_OFFSET] = drive->select.all;
args.hobRegister[IDE_CONTROL_OFFSET_HOB]= (drive->ctl|0x80);
args.rq = (struct request *) rq;
rq->special = (ide_task_t *)&args;
return do_rw_taskfile(drive, &args);
}
#endif /* CONFIG_IDE_TASKFILE_IO */
static ide_startstop_t ide_do_rw_disk (ide_drive_t *drive, struct request *rq, sector_t block)
{
ide_hwif_t *hwif = HWIF(drive);
if (hwif->rw_disk)
return hwif->rw_disk(drive, rq, block);
else
return __ide_do_rw_disk(drive, rq, block);
}
static int do_idedisk_flushcache(ide_drive_t *drive);
static u8 idedisk_dump_status (ide_drive_t *drive, const char *msg, u8 stat)
{
ide_hwif_t *hwif = HWIF(drive);
unsigned long flags;
u8 err = 0;
local_irq_set(flags);
printk("%s: %s: status=0x%02x", drive->name, msg, stat);
#if FANCY_STATUS_DUMPS
printk(" { ");
if (stat & BUSY_STAT)
printk("Busy ");
else {
if (stat & READY_STAT) printk("DriveReady ");
if (stat & WRERR_STAT) printk("DeviceFault ");
if (stat & SEEK_STAT) printk("SeekComplete ");
if (stat & DRQ_STAT) printk("DataRequest ");
if (stat & ECC_STAT) printk("CorrectedError ");
if (stat & INDEX_STAT) printk("Index ");
if (stat & ERR_STAT) printk("Error ");
}
printk("}");
#endif /* FANCY_STATUS_DUMPS */
printk("\n");
if ((stat & (BUSY_STAT|ERR_STAT)) == ERR_STAT) {
err = hwif->INB(IDE_ERROR_REG);
printk("%s: %s: error=0x%02x", drive->name, msg, err);
#if FANCY_STATUS_DUMPS
printk(" { ");
if (err & ABRT_ERR) printk("DriveStatusError ");
if (err & ICRC_ERR)
printk("Bad%s ", (err & ABRT_ERR) ? "CRC" : "Sector");
if (err & ECC_ERR) printk("UncorrectableError ");
if (err & ID_ERR) printk("SectorIdNotFound ");
if (err & TRK0_ERR) printk("TrackZeroNotFound ");
if (err & MARK_ERR) printk("AddrMarkNotFound ");
printk("}");
if ((err & (BBD_ERR | ABRT_ERR)) == BBD_ERR ||
(err & (ECC_ERR|ID_ERR|MARK_ERR))) {
if (drive->addressing == 1) {
__u64 sectors = 0;
u32 low = 0, high = 0;
low = ide_read_24(drive);
hwif->OUTB(drive->ctl|0x80, IDE_CONTROL_REG);
high = ide_read_24(drive);
sectors = ((__u64)high << 24) | low;
printk(", LBAsect=%llu, high=%d, low=%d",
(unsigned long long) sectors,
high, low);
} else {
u8 cur = hwif->INB(IDE_SELECT_REG);
if (cur & 0x40) { /* using LBA? */
printk(", LBAsect=%ld", (unsigned long)
((cur&0xf)<<24)
|(hwif->INB(IDE_HCYL_REG)<<16)
|(hwif->INB(IDE_LCYL_REG)<<8)
| hwif->INB(IDE_SECTOR_REG));
} else {
printk(", CHS=%d/%d/%d",
(hwif->INB(IDE_HCYL_REG)<<8) +
hwif->INB(IDE_LCYL_REG),
cur & 0xf,
hwif->INB(IDE_SECTOR_REG));
}
}
if (HWGROUP(drive) && HWGROUP(drive)->rq)
printk(", sector=%llu",
(unsigned long long)HWGROUP(drive)->rq->sector);
}
}
#endif /* FANCY_STATUS_DUMPS */
printk("\n");
local_irq_restore(flags);
return err;
}
ide_startstop_t idedisk_error (ide_drive_t *drive, const char *msg, u8 stat)
{
ide_hwif_t *hwif;
struct request *rq;
u8 err;
int i = (drive->mult_count ? drive->mult_count : 1) * SECTOR_WORDS;
err = idedisk_dump_status(drive, msg, stat);
if (drive == NULL || (rq = HWGROUP(drive)->rq) == NULL)
return ide_stopped;
hwif = HWIF(drive);
/* retry only "normal" I/O: */
if (rq->flags & (REQ_DRIVE_CMD | REQ_DRIVE_TASK | REQ_DRIVE_TASKFILE)) {
rq->errors = 1;
ide_end_drive_cmd(drive, stat, err);
return ide_stopped;
}
#ifdef CONFIG_IDE_TASKFILE_IO
/* make rq completion pointers new submission pointers */
blk_rq_prep_restart(rq);
#endif
if (stat & BUSY_STAT || ((stat & WRERR_STAT) && !drive->nowerr)) {
/* other bits are useless when BUSY */
rq->errors |= ERROR_RESET;
} else if (stat & ERR_STAT) {
/* err has different meaning on cdrom and tape */
if (err == ABRT_ERR) {
if (drive->select.b.lba &&
/* some newer drives don't support WIN_SPECIFY */
hwif->INB(IDE_COMMAND_REG) == WIN_SPECIFY)
return ide_stopped;
} else if ((err & BAD_CRC) == BAD_CRC) {
/* UDMA crc error, just retry the operation */
drive->crc_count++;
} else if (err & (BBD_ERR | ECC_ERR)) {
/* retries won't help these */
rq->errors = ERROR_MAX;
} else if (err & TRK0_ERR) {
/* help it find track zero */
rq->errors |= ERROR_RECAL;
}
}
if ((stat & DRQ_STAT) && rq_data_dir(rq) == READ) {
/*
* try_to_flush_leftover_data() is invoked in response to
* a drive unexpectedly having its DRQ_STAT bit set. As
* an alternative to resetting the drive, this routine
* tries to clear the condition by read a sector's worth
* of data from the drive. Of course, this may not help
* if the drive is *waiting* for data from *us*.
*/
while (i > 0) {
u32 buffer[16];
unsigned int wcount = (i > 16) ? 16 : i;
i -= wcount;
taskfile_input_data(drive, buffer, wcount);
}
}
if (hwif->INB(IDE_STATUS_REG) & (BUSY_STAT|DRQ_STAT)) {
/* force an abort */
hwif->OUTB(WIN_IDLEIMMEDIATE,IDE_COMMAND_REG);
}
if (rq->errors >= ERROR_MAX || blk_noretry_request(rq))
DRIVER(drive)->end_request(drive, 0, 0);
else {
if ((rq->errors & ERROR_RESET) == ERROR_RESET) {
++rq->errors;
return ide_do_reset(drive);
}
if ((rq->errors & ERROR_RECAL) == ERROR_RECAL)
drive->special.b.recalibrate = 1;
++rq->errors;
}
return ide_stopped;
}
ide_startstop_t idedisk_abort(ide_drive_t *drive, const char *msg)
{
ide_hwif_t *hwif;
struct request *rq;
if (drive == NULL || (rq = HWGROUP(drive)->rq) == NULL)
return ide_stopped;
hwif = HWIF(drive);
if (rq->flags & (REQ_DRIVE_CMD | REQ_DRIVE_TASK | REQ_DRIVE_TASKFILE)) {
rq->errors = 1;
ide_end_drive_cmd(drive, BUSY_STAT, 0);
return ide_stopped;
}
DRIVER(drive)->end_request(drive, 0, 0);
return ide_stopped;
}
/*
* 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;
}
#ifdef CONFIG_IDEDISK_STROKE
/*
* 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;
}
#endif /* CONFIG_IDEDISK_STROKE */
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 inline 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));
#ifdef CONFIG_IDEDISK_STROKE
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);
}
#endif
}
/*
* 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;
}
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;
if (!IS_PDC4030_DRIVE) {
ide_task_t args;
memset(&args, 0, sizeof(ide_task_t));
args.tfRegister[IDE_NSECTOR_OFFSET] = drive->sect;
args.tfRegister[IDE_SECTOR_OFFSET] = drive->sect;
args.tfRegister[IDE_LCYL_OFFSET] = drive->cyl;
args.tfRegister[IDE_HCYL_OFFSET] = drive->cyl>>8;
args.tfRegister[IDE_SELECT_OFFSET] = ((drive->head-1)|drive->select.all)&0xBF;
args.tfRegister[IDE_COMMAND_OFFSET] = WIN_SPECIFY;
args.command_type = IDE_DRIVE_TASK_NO_DATA;
args.handler = &set_geometry_intr;
do_rw_taskfile(drive, &args);
}
} else if (s->b.recalibrate) {
s->b.recalibrate = 0;
if (!IS_PDC4030_DRIVE) {
ide_task_t args;
memset(&args, 0, sizeof(ide_task_t));
args.tfRegister[IDE_NSECTOR_OFFSET] = drive->sect;
args.tfRegister[IDE_COMMAND_OFFSET] = WIN_RESTORE;
args.command_type = IDE_DRIVE_TASK_NO_DATA;
args.handler = &recal_intr;
do_rw_taskfile(drive, &args);
}
} else if (s->b.set_multmode) {
s->b.set_multmode = 0;
if (drive->mult_req > drive->id->max_multsect)
drive->mult_req = drive->id->max_multsect;
if (!IS_PDC4030_DRIVE) {
ide_task_t args;
memset(&args, 0, sizeof(ide_task_t));
args.tfRegister[IDE_NSECTOR_OFFSET] = drive->mult_req;
args.tfRegister[IDE_COMMAND_OFFSET] = WIN_SETMULT;
args.command_type = IDE_DRIVE_TASK_NO_DATA;
args.handler = &set_multmode_intr;
do_rw_taskfile(drive, &args);
}
} 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)
{
int legacy = (drive->id->cfs_enable_2 & 0x0400) ? 0 : 1;
drive->special.all = 0;
drive->special.b.set_geometry = legacy;
drive->special.b.recalibrate = legacy;
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)
{
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.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.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_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 },
{ "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 */
/*
* 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 (drive->special.b.set_multmode)
return -EBUSY;
ide_init_drive_cmd (&rq);
rq.flags = REQ_DRIVE_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 (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 int write_cache (ide_drive_t *drive, int arg)
{
ide_task_t args;
if (!(drive->id->cfs_enable_2 & 0x3000))
return 1;
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;
(void) ide_raw_taskfile(drive, &args, NULL);
drive->wcache = arg;
return 0;
}
static int do_idedisk_flushcache (ide_drive_t *drive)
{
ide_task_t args;
memset(&args, 0, sizeof(ide_task_t));
if (drive->id->cfs_enable_2 & 0x2400)
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;
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;
}
#ifdef CONFIG_BLK_DEV_IDE_TCQ
static int set_using_tcq(ide_drive_t *drive, int arg)
{
int ret;
if (!drive->driver)
return -EPERM;
if (arg == drive->queue_depth && drive->using_tcq)
return 0;
/*
* set depth, but check also id for max supported depth
*/
drive->queue_depth = arg ? arg : 1;
if (drive->id) {
if (drive->queue_depth > drive->id->queue_depth + 1)
drive->queue_depth = drive->id->queue_depth + 1;
}
if (arg)
ret = __ide_dma_queued_on(drive);
else
ret = __ide_dma_queued_off(drive);
return ret ? -EIO : 0;
}
#endif
/*
* 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)
{
drive->addressing = 0;
if (HWIF(drive)->no_lba48)
return 0;
if (!idedisk_supports_lba48(drive->id))
return -EIO;
drive->addressing = arg;
return 0;
}
static void idedisk_add_settings(ide_drive_t *drive)
{
struct hd_driveid *id = drive->id;
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, "address", SETTING_RW, HDIO_GET_ADDRESS, HDIO_SET_ADDRESS, TYPE_INTA, 0, 2, 1, 1, &drive->addressing, set_lba_addressing);
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, 1, &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, "lun", SETTING_RW, -1, -1, TYPE_INT, 0, 7, 1, 1, &drive->lun, NULL);
ide_add_setting(drive, "wcache", SETTING_RW, HDIO_GET_WCACHE, HDIO_SET_WCACHE, TYPE_BYTE, 0, 1, 1, 1, &drive->wcache, write_cache);
ide_add_setting(drive, "acoustic", SETTING_RW, HDIO_GET_ACOUSTIC, HDIO_SET_ACOUSTIC, TYPE_BYTE, 0, 254, 1, 1, &drive->acoustic, set_acoustic);
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);
#ifdef CONFIG_BLK_DEV_IDE_TCQ
ide_add_setting(drive, "using_tcq", SETTING_RW, HDIO_GET_QDMA, HDIO_SET_QDMA, TYPE_BYTE, 0, IDE_MAX_TAG, 1, 1, &drive->using_tcq, set_using_tcq);
#endif
}
/*
* Power Management state machine. This one is rather trivial for now,
* we should probably add more, like switching back to PIO on suspend
* to help some BIOSes, re-do the door locking on resume, etc...
*/
enum {
idedisk_pm_flush_cache = ide_pm_state_start_suspend,
idedisk_pm_standby,
idedisk_pm_restore_dma = ide_pm_state_start_resume,
};
static void idedisk_complete_power_step (ide_drive_t *drive, struct request *rq, u8 stat, u8 error)
{
switch (rq->pm->pm_step) {
case idedisk_pm_flush_cache: /* Suspend step 1 (flush cache) complete */
if (rq->pm->pm_state == 4)
rq->pm->pm_step = ide_pm_state_completed;
else
rq->pm->pm_step = idedisk_pm_standby;
break;
case idedisk_pm_standby: /* Suspend step 2 (standby) complete */
rq->pm->pm_step = ide_pm_state_completed;
break;
}
}
static ide_startstop_t idedisk_start_power_step (ide_drive_t *drive, struct request *rq)
{
ide_task_t *args = rq->special;
memset(args, 0, sizeof(*args));
switch (rq->pm->pm_step) {
case idedisk_pm_flush_cache: /* Suspend step 1 (flush cache) */
/* Not supported? Switch to next step now. */
if (!drive->wcache) {
idedisk_complete_power_step(drive, rq, 0, 0);
return ide_stopped;
}
if (drive->id->cfs_enable_2 & 0x2400)
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 do_rw_taskfile(drive, args);
case idedisk_pm_standby: /* Suspend step 2 (standby) */
args->tfRegister[IDE_COMMAND_OFFSET] = WIN_STANDBYNOW1;
args->command_type = IDE_DRIVE_TASK_NO_DATA;
args->handler = &task_no_data_intr;
return do_rw_taskfile(drive, args);
case idedisk_pm_restore_dma: /* Resume step 1 (restore DMA) */
/*
* Right now, all we do is call hwif->ide_dma_check(drive),
* we could be smarter and check for current xfer_speed
* in struct drive etc...
* Also, this step could be implemented as a generic helper
* as most subdrivers will use it
*/
if ((drive->id->capability & 1) == 0)
break;
if (HWIF(drive)->ide_dma_check == NULL)
break;
HWIF(drive)->ide_dma_check(drive);
break;
}
rq->pm->pm_step = ide_pm_state_completed;
return ide_stopped;
}
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;
/*
* 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_flash)) {
/*
* 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("%s: max request size: %dKiB\n", drive->name, drive->queue->max_sectors / 2);
/* 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);
/* limit drive capacity to 137GB if LBA48 cannot be used */
if (drive->addressing == 0 && drive->capacity64 > 1ULL << 28) {
printk("%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 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)
(void) HWIF(drive)->ide_dma_verbose(drive);
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 /* CONFIG_IDEDISK_MULTI_MODE */
}
drive->no_io_32bit = id->dword_io ? 1 : 0;
if (drive->id->cfs_enable_2 & 0x3000)
write_cache(drive, (id->cfs_enable_2 & 0x3000));
#ifdef CONFIG_BLK_DEV_IDE_TCQ_DEFAULT
if (drive->using_dma)
__ide_dma_queued_on(drive);
#endif
}
static int idedisk_cleanup (ide_drive_t *drive)
{
static int ide_cacheflush_p(ide_drive_t *drive);
struct gendisk *g = drive->disk;
ide_cacheflush_p(drive);
if (ide_unregister_subdriver(drive))
return 1;
del_gendisk(g);
drive->devfs_name[0] = '\0';
g->fops = ide_fops;
return 0;
}
static int idedisk_attach(ide_drive_t *drive);
static void ide_device_shutdown(struct device *dev)
{
ide_drive_t *drive = container_of(dev, ide_drive_t, gendev);
printk("Shutdown: %s\n", drive->name);
dev->bus->suspend(dev, PM_SUSPEND_STANDBY);
}
/*
* IDE subdriver functions, registered with ide.c
*/
static ide_driver_t idedisk_driver = {
.owner = THIS_MODULE,
.gen_driver = {
.shutdown = ide_device_shutdown,
},
.name = "ide-disk",
.version = IDEDISK_VERSION,
.media = ide_disk,
.busy = 0,
.supports_dsc_overlap = 0,
.cleanup = idedisk_cleanup,
.do_request = ide_do_rw_disk,
.sense = idedisk_dump_status,
.error = idedisk_error,
.abort = idedisk_abort,
.pre_reset = idedisk_pre_reset,
.capacity = idedisk_capacity,
.special = idedisk_special,
.proc = idedisk_proc,
.attach = idedisk_attach,
.drives = LIST_HEAD_INIT(idedisk_driver.drives),
.start_power_step = idedisk_start_power_step,
.complete_power_step = idedisk_complete_power_step,
};
static int idedisk_open(struct inode *inode, struct file *filp)
{
u8 cf;
ide_drive_t *drive = inode->i_bdev->bd_disk->private_data;
drive->usage++;
if (drive->removable && drive->usage == 1) {
ide_task_t args;
memset(&args, 0, sizeof(ide_task_t));
args.tfRegister[IDE_COMMAND_OFFSET] = WIN_DOORLOCK;
args.command_type = IDE_DRIVE_TASK_NO_DATA;
args.handler = &task_no_data_intr;
check_disk_change(inode->i_bdev);
/*
* 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_raw_taskfile(drive, &args, NULL))
drive->doorlocking = 0;
}
drive->wcache = 0;
/* Cache enabled? */
if (drive->id->csfo & 1)
drive->wcache = 1;
/* Cache command set available? */
if (drive->id->cfs_enable_1 & (1 << 5))
drive->wcache = 1;
/* ATA6 cache extended commands */
cf = drive->id->command_set_2 >> 24;
if ((cf & 0xC0) == 0x40 && (cf & 0x30) != 0)
drive->wcache = 1;
return 0;
}
static int ide_cacheflush_p(ide_drive_t *drive)
{
if (!(drive->id->cfs_enable_2 & 0x3000))
return 0;
if(drive->wcache)
{
if (do_idedisk_flushcache(drive))
{
printk (KERN_INFO "%s: Write Cache FAILED Flushing!\n",
drive->name);
return -EIO;
}
return 1;
}
return 0;
}
static int idedisk_release(struct inode *inode, struct file *filp)
{
ide_drive_t *drive = inode->i_bdev->bd_disk->private_data;
if (drive->usage == 1)
ide_cacheflush_p(drive);
if (drive->removable && drive->usage == 1) {
ide_task_t args;
memset(&args, 0, sizeof(ide_task_t));
args.tfRegister[IDE_COMMAND_OFFSET] = WIN_DOORUNLOCK;
args.command_type = IDE_DRIVE_TASK_NO_DATA;
args.handler = &task_no_data_intr;
if (drive->doorlocking && ide_raw_taskfile(drive, &args, NULL))
drive->doorlocking = 0;
}
drive->usage--;
return 0;
}
static int idedisk_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
struct block_device *bdev = inode->i_bdev;
return generic_ide_ioctl(bdev, cmd, arg);
}
static int idedisk_media_changed(struct gendisk *disk)
{
ide_drive_t *drive = disk->private_data;
/* do not scan partitions twice if this is a removable device */
if (drive->attach) {
drive->attach = 0;
return 0;
}
/* if removable, always assume it was changed */
return drive->removable;
}
static int idedisk_revalidate_disk(struct gendisk *disk)
{
ide_drive_t *drive = disk->private_data;
set_capacity(disk, current_capacity(drive));
return 0;
}
static struct block_device_operations idedisk_ops = {
.owner = THIS_MODULE,
.open = idedisk_open,
.release = idedisk_release,
.ioctl = idedisk_ioctl,
.media_changed = idedisk_media_changed,
.revalidate_disk= idedisk_revalidate_disk
};
MODULE_DESCRIPTION("ATA DISK Driver");
static int idedisk_attach(ide_drive_t *drive)
{
struct gendisk *g = drive->disk;
/* strstr("foo", "") is non-NULL */
if (!strstr("ide-disk", drive->driver_req))
goto failed;
if (!drive->present)
goto failed;
if (drive->media != ide_disk)
goto failed;
if (ide_register_subdriver(drive, &idedisk_driver)) {
printk (KERN_ERR "ide-disk: %s: Failed to register the driver with ide.c\n", drive->name);
goto failed;
}
DRIVER(drive)->busy++;
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);
if ((drive->id->cfs_enable_2 & 0x3000) && drive->wcache)
if (do_idedisk_flushcache(drive))
printk (KERN_INFO "%s: Write Cache FAILED Flushing!\n",
drive->name);
ide_unregister_subdriver(drive);
DRIVER(drive)->busy--;
goto failed;
}
DRIVER(drive)->busy--;
g->minors = 1 << PARTN_BITS;
strcpy(g->devfs_name, drive->devfs_name);
g->driverfs_dev = &drive->gendev;
g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0;
set_capacity(g, current_capacity(drive));
g->fops = &idedisk_ops;
drive->attach = 1;
add_disk(g);
return 0;
failed:
return 1;
}
static void __exit idedisk_exit (void)
{
ide_unregister_driver(&idedisk_driver);
}
static int idedisk_init (void)
{
return ide_register_driver(&idedisk_driver);
}
module_init(idedisk_init);
module_exit(idedisk_exit);
MODULE_LICENSE("GPL");
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