Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/drivers/ide/ide-disk.c b/drivers/ide/ide-disk.c
new file mode 100644
index 0000000..5d54f77
--- /dev/null
+++ b/drivers/ide/ide-disk.c
@@ -0,0 +1,1280 @@
+/*
+ * 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 */
+
+//#define DEBUG
+
+#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>
+
+struct ide_disk_obj {
+ ide_drive_t *drive;
+ ide_driver_t *driver;
+ struct gendisk *disk;
+ struct kref kref;
+};
+
+static DECLARE_MUTEX(idedisk_ref_sem);
+
+#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;
+
+ down(&idedisk_ref_sem);
+ idkp = ide_disk_g(disk);
+ if (idkp)
+ kref_get(&idkp->kref);
+ up(&idedisk_ref_sem);
+ return idkp;
+}
+
+static void ide_disk_release(struct kref *);
+
+static void ide_disk_put(struct ide_disk_obj *idkp)
+{
+ down(&idedisk_ref_sem);
+ kref_put(&idkp->kref, ide_disk_release);
+ up(&idedisk_ref_sem);
+}
+
+/*
+ * 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 */
+}
+
+/*
+ * __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, 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;
+ }
+
+ pr_debug("%s: %sing: block=%llu, sectors=%lu, buffer=0x%08lx\n",
+ drive->name, rq_data_dir(rq) == READ ? "read" : "writ",
+ 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 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));
+
+ 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_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 }
+};
+
+#else
+
+#define idedisk_proc NULL
+
+#endif /* CONFIG_PROC_FS */
+
+static void idedisk_end_flush(request_queue_t *q, struct request *flush_rq)
+{
+ ide_drive_t *drive = q->queuedata;
+ struct request *rq = flush_rq->end_io_data;
+ int good_sectors = rq->hard_nr_sectors;
+ int bad_sectors;
+ sector_t sector;
+
+ if (flush_rq->errors & ABRT_ERR) {
+ printk(KERN_ERR "%s: barrier support doesn't work\n", drive->name);
+ blk_queue_ordered(drive->queue, QUEUE_ORDERED_NONE);
+ blk_queue_issue_flush_fn(drive->queue, NULL);
+ good_sectors = 0;
+ } else if (flush_rq->errors) {
+ good_sectors = 0;
+ if (blk_barrier_preflush(rq)) {
+ sector = ide_get_error_location(drive,flush_rq->buffer);
+ if ((sector >= rq->hard_sector) &&
+ (sector < rq->hard_sector + rq->hard_nr_sectors))
+ good_sectors = sector - rq->hard_sector;
+ }
+ }
+
+ if (flush_rq->errors)
+ printk(KERN_ERR "%s: failed barrier write: "
+ "sector=%Lx(good=%d/bad=%d)\n",
+ drive->name, (unsigned long long)rq->sector,
+ good_sectors,
+ (int) (rq->hard_nr_sectors-good_sectors));
+
+ bad_sectors = rq->hard_nr_sectors - good_sectors;
+
+ if (good_sectors)
+ __ide_end_request(drive, rq, 1, good_sectors);
+ if (bad_sectors)
+ __ide_end_request(drive, rq, 0, bad_sectors);
+}
+
+static int idedisk_prepare_flush(request_queue_t *q, struct request *rq)
+{
+ ide_drive_t *drive = q->queuedata;
+
+ if (!drive->wcache)
+ return 0;
+
+ 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->flags |= REQ_DRIVE_TASK | REQ_SOFTBARRIER;
+ rq->buffer = rq->cmd;
+ return 1;
+}
+
+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);
+
+ /*
+ * 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 (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;
+ int err;
+
+ if (!ide_id_has_flush_cache(drive->id))
+ 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;
+
+ err = ide_raw_taskfile(drive, &args, NULL);
+ if (err)
+ return err;
+
+ 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 (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;
+
+ 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)
+{
+ 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);
+}
+
+static void idedisk_setup (ide_drive_t *drive)
+{
+ struct hd_driveid *id = drive->id;
+ unsigned long long capacity;
+ int barrier;
+
+ 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(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");
+
+ drive->no_io_32bit = id->dword_io ? 1 : 0;
+
+ /* write cache enabled? */
+ if ((id->csfo & 1) || (id->cfs_enable_1 & (1 << 5)))
+ drive->wcache = 1;
+
+ write_cache(drive, 1);
+
+ /*
+ * 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.
+ */
+ barrier = 0;
+ if (ide_id_has_flush_cache(id))
+ barrier = 1;
+ if (drive->addressing == 1) {
+ /* Can't issue the correct flush ? */
+ if (capacity > (1ULL << 28) && !ide_id_has_flush_cache_ext(id))
+ barrier = 0;
+ }
+
+ printk(KERN_INFO "%s: cache flushes %ssupported\n",
+ drive->name, barrier ? "" : "not ");
+ if (barrier) {
+ blk_queue_ordered(drive->queue, QUEUE_ORDERED_FLUSH);
+ drive->queue->prepare_flush_fn = idedisk_prepare_flush;
+ drive->queue->end_flush_fn = idedisk_end_flush;
+ blk_queue_issue_flush_fn(drive->queue, idedisk_issue_flush);
+ }
+}
+
+static void ide_cacheflush_p(ide_drive_t *drive)
+{
+ if (!drive->wcache || !ide_id_has_flush_cache(drive->id))
+ return;
+
+ if (do_idedisk_flushcache(drive))
+ printk(KERN_INFO "%s: wcache flush failed!\n", drive->name);
+}
+
+static int idedisk_cleanup (ide_drive_t *drive)
+{
+ struct ide_disk_obj *idkp = drive->driver_data;
+ struct gendisk *g = idkp->disk;
+
+ ide_cacheflush_p(drive);
+ if (ide_unregister_subdriver(drive))
+ return 1;
+ del_gendisk(g);
+
+ ide_disk_put(idkp);
+
+ return 0;
+}
+
+static void ide_disk_release(struct kref *kref)
+{
+ struct ide_disk_obj *idkp = to_ide_disk(kref);
+ ide_drive_t *drive = idkp->drive;
+ struct gendisk *g = idkp->disk;
+
+ drive->driver_data = NULL;
+ drive->devfs_name[0] = '\0';
+ g->private_data = NULL;
+ put_disk(g);
+ kfree(idkp);
+}
+
+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);
+
+#ifdef CONFIG_ALPHA
+ /* On Alpha, halt(8) doesn't actually turn the machine off,
+ it puts you into the sort of firmware monitor. Typically,
+ it's used to boot another kernel image, so it's not much
+ different from reboot(8). Therefore, we don't need to
+ spin down the disk in this case, especially since Alpha
+ firmware doesn't handle disks in standby mode properly.
+ On the other hand, it's reasonably safe to turn the power
+ off when the shutdown process reaches the firmware prompt,
+ as the firmware initialization takes rather long time -
+ at least 10 seconds, which should be sufficient for
+ the disk to expire its write cache. */
+ if (system_state != SYSTEM_POWER_OFF) {
+#else
+ if (system_state == SYSTEM_RESTART) {
+#endif
+ ide_cacheflush_p(drive);
+ return;
+ }
+
+ printk("Shutdown: %s\n", drive->name);
+ dev->bus->suspend(dev, PMSG_SUSPEND);
+}
+
+/*
+ * 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,
+ .end_request = ide_end_request,
+ .error = __ide_error,
+ .abort = __ide_abort,
+ .proc = idedisk_proc,
+ .attach = idedisk_attach,
+ .drives = LIST_HEAD_INIT(idedisk_driver.drives),
+};
+
+static int idedisk_open(struct inode *inode, struct file *filp)
+{
+ struct gendisk *disk = inode->i_bdev->bd_disk;
+ struct ide_disk_obj *idkp;
+ ide_drive_t *drive;
+
+ if (!(idkp = ide_disk_get(disk)))
+ return -ENXIO;
+
+ drive = idkp->drive;
+
+ 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;
+ }
+ return 0;
+}
+
+static int idedisk_release(struct inode *inode, struct file *filp)
+{
+ struct gendisk *disk = inode->i_bdev->bd_disk;
+ struct ide_disk_obj *idkp = ide_disk_g(disk);
+ ide_drive_t *drive = idkp->drive;
+
+ 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--;
+
+ ide_disk_put(idkp);
+
+ 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;
+ struct ide_disk_obj *idkp = ide_disk_g(bdev->bd_disk);
+ return generic_ide_ioctl(idkp->drive, file, bdev, cmd, arg);
+}
+
+static int idedisk_media_changed(struct gendisk *disk)
+{
+ struct ide_disk_obj *idkp = ide_disk_g(disk);
+ ide_drive_t *drive = idkp->drive;
+
+ /* 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)
+{
+ struct ide_disk_obj *idkp = ide_disk_g(disk);
+ set_capacity(disk, idedisk_capacity(idkp->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 ide_disk_obj *idkp;
+ struct gendisk *g;
+
+ /* 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;
+
+ idkp = kmalloc(sizeof(*idkp), GFP_KERNEL);
+ if (!idkp)
+ goto failed;
+
+ g = alloc_disk(1 << PARTN_BITS);
+ if (!g)
+ goto out_free_idkp;
+
+ ide_init_disk(g, drive);
+
+ 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 out_put_disk;
+ }
+
+ memset(idkp, 0, sizeof(*idkp));
+
+ kref_init(&idkp->kref);
+
+ idkp->drive = drive;
+ idkp->driver = &idedisk_driver;
+ idkp->disk = g;
+
+ g->private_data = &idkp->driver;
+
+ drive->driver_data = idkp;
+
+ 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);
+ drive->attach = 0;
+ } else
+ drive->attach = 1;
+ 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, idedisk_capacity(drive));
+ g->fops = &idedisk_ops;
+ add_disk(g);
+ return 0;
+
+out_put_disk:
+ put_disk(g);
+out_free_idkp:
+ kfree(idkp);
+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");