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linux/drivers/ide/ide-probe.c
Elias Oltmanns 4abdc6ee7c ide: Implement disk shock protection support (v4) 
On user request (through sysfs), the IDLE IMMEDIATE command with UNLOAD
FEATURE as specified in ATA-7 is issued to the device and processing of
the request queue is stopped thereafter until the specified timeout
expires or user space asks to resume normal operation. This is supposed
to prevent the heads of a hard drive from accidentally crashing onto the
platter when a heavy shock is anticipated (like a falling laptop expected
to hit the floor). Port resets are deferred whenever a device on that
port is in the parked state.

v3:
Elias Oltmanns <eo@nebensachen.de> wrote:
[...]
> >> 1. Make sure that no negative value is being passed to
> >>    jiffies_to_msecs() in ide_park_show().
> >> 2. Drop the superfluous variable hwif in ide_special_rq().
> >> 3. Skip initialisation of task and tf in ide_special_rq() if we are not
> >>    handling a (un)park request.
> >
> > Well, #3 should have been done differently because we donn't want to
> > check for REQ_(UN)?PARK_HEADS more often than is necessary.
> 
> While preparing the backport to 2.6.27, it has just occurred to me that
> we need to clear the IDE_DFLAG_PARKED flag in ide_disk_pre_reset()
> because this flag must not be set after *any* sort of access to the
> device.

v4:
Fix a memory leak due to a missing blk_put_request() in
issue_park_cmd(). Additionally, we should plug the queue when enqueueing
the unpark request because there is no guarantee that the park timeout
has not expired by then. Even though the chance for that to happen is
very slim, the request might end up hanging in the queue until the next
I/O operation is queued up. While at it, clean up the code a little:
- make issue_park_cmd() a function of type void since nobody cares for
  the return value anyway;
- use blk_start_queueing() instead of __blk_run_queue() since we don't
  have to worry about recursion;
- remove a superfluous pointer deference in task_no_data_intr().

Signed-off-by: Elias Oltmanns <eo@nebensachen.de>
Cc: Jeff Garzik <jeff@garzik.org>,
Cc: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Tejun Heo <htejun@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2008-10-13 21:39:50 +02:00

1851 lines
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/*
* Copyright (C) 1994-1998 Linus Torvalds & authors (see below)
* Copyright (C) 2005, 2007 Bartlomiej Zolnierkiewicz
*/
/*
* Mostly written by Mark Lord <mlord@pobox.com>
* and Gadi Oxman <gadio@netvision.net.il>
* and Andre Hedrick <andre@linux-ide.org>
*
* See linux/MAINTAINERS for address of current maintainer.
*
* This is the IDE probe module, as evolved from hd.c and ide.c.
*
* -- increase WAIT_PIDENTIFY to avoid CD-ROM locking at boot
* by Andrea Arcangeli
*/
#include <linux/module.h>
#include <linux/types.h>
#include <linux/string.h>
#include <linux/kernel.h>
#include <linux/timer.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <linux/major.h>
#include <linux/errno.h>
#include <linux/genhd.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/ide.h>
#include <linux/spinlock.h>
#include <linux/kmod.h>
#include <linux/pci.h>
#include <linux/scatterlist.h>
#include <asm/byteorder.h>
#include <asm/irq.h>
#include <asm/uaccess.h>
#include <asm/io.h>
/**
* generic_id - add a generic drive id
* @drive: drive to make an ID block for
*
* Add a fake id field to the drive we are passed. This allows
* use to skip a ton of NULL checks (which people always miss)
* and make drive properties unconditional outside of this file
*/
static void generic_id(ide_drive_t *drive)
{
u16 *id = drive->id;
id[ATA_ID_CUR_CYLS] = id[ATA_ID_CYLS] = drive->cyl;
id[ATA_ID_CUR_HEADS] = id[ATA_ID_HEADS] = drive->head;
id[ATA_ID_CUR_SECTORS] = id[ATA_ID_SECTORS] = drive->sect;
}
static void ide_disk_init_chs(ide_drive_t *drive)
{
u16 *id = drive->id;
/* 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[ATA_ID_CYLS];
drive->head = drive->bios_head = id[ATA_ID_HEADS];
drive->sect = drive->bios_sect = id[ATA_ID_SECTORS];
}
/* Handle logical geometry translation by the drive */
if (ata_id_current_chs_valid(id)) {
drive->cyl = id[ATA_ID_CUR_CYLS];
drive->head = id[ATA_ID_CUR_HEADS];
drive->sect = id[ATA_ID_CUR_SECTORS];
}
/* Use physical geometry if what we have still makes no sense */
if (drive->head > 16 && id[ATA_ID_HEADS] && id[ATA_ID_HEADS] <= 16) {
drive->cyl = id[ATA_ID_CYLS];
drive->head = id[ATA_ID_HEADS];
drive->sect = id[ATA_ID_SECTORS];
}
}
static void ide_disk_init_mult_count(ide_drive_t *drive)
{
u16 *id = drive->id;
u8 max_multsect = id[ATA_ID_MAX_MULTSECT] & 0xff;
if (max_multsect) {
if ((max_multsect / 2) > 1)
id[ATA_ID_MULTSECT] = max_multsect | 0x100;
else
id[ATA_ID_MULTSECT] &= ~0x1ff;
drive->mult_req = id[ATA_ID_MULTSECT] & 0xff;
if (drive->mult_req)
drive->special.b.set_multmode = 1;
}
}
/**
* do_identify - identify a drive
* @drive: drive to identify
* @cmd: command used
*
* Called when we have issued a drive identify command to
* read and parse the results. This function is run with
* interrupts disabled.
*/
static inline void do_identify (ide_drive_t *drive, u8 cmd)
{
ide_hwif_t *hwif = HWIF(drive);
u16 *id = drive->id;
char *m = (char *)&id[ATA_ID_PROD];
int bswap = 1, is_cfa;
/* read 512 bytes of id info */
hwif->tp_ops->input_data(drive, NULL, id, SECTOR_SIZE);
drive->dev_flags |= IDE_DFLAG_ID_READ;
local_irq_enable();
#ifdef DEBUG
printk(KERN_INFO "%s: dumping identify data\n", drive->name);
ide_dump_identify((u8 *)id);
#endif
ide_fix_driveid(id);
/*
* ATA_CMD_ID_ATA returns little-endian info,
* ATA_CMD_ID_ATAPI *usually* returns little-endian info.
*/
if (cmd == ATA_CMD_ID_ATAPI) {
if ((m[0] == 'N' && m[1] == 'E') || /* NEC */
(m[0] == 'F' && m[1] == 'X') || /* Mitsumi */
(m[0] == 'P' && m[1] == 'i')) /* Pioneer */
/* Vertos drives may still be weird */
bswap ^= 1;
}
ide_fixstring(m, ATA_ID_PROD_LEN, bswap);
ide_fixstring((char *)&id[ATA_ID_FW_REV], ATA_ID_FW_REV_LEN, bswap);
ide_fixstring((char *)&id[ATA_ID_SERNO], ATA_ID_SERNO_LEN, bswap);
/* we depend on this a lot! */
m[ATA_ID_PROD_LEN - 1] = '\0';
if (strstr(m, "E X A B Y T E N E S T"))
goto err_misc;
printk(KERN_INFO "%s: %s, ", drive->name, m);
drive->dev_flags |= IDE_DFLAG_PRESENT;
drive->dev_flags &= ~IDE_DFLAG_DEAD;
/*
* Check for an ATAPI device
*/
if (cmd == ATA_CMD_ID_ATAPI) {
u8 type = (id[ATA_ID_CONFIG] >> 8) & 0x1f;
printk(KERN_CONT "ATAPI ");
switch (type) {
case ide_floppy:
if (!strstr(m, "CD-ROM")) {
if (!strstr(m, "oppy") &&
!strstr(m, "poyp") &&
!strstr(m, "ZIP"))
printk(KERN_CONT "cdrom or floppy?, assuming ");
if (drive->media != ide_cdrom) {
printk(KERN_CONT "FLOPPY");
drive->dev_flags |= IDE_DFLAG_REMOVABLE;
break;
}
}
/* Early cdrom models used zero */
type = ide_cdrom;
case ide_cdrom:
drive->dev_flags |= IDE_DFLAG_REMOVABLE;
#ifdef CONFIG_PPC
/* kludge for Apple PowerBook internal zip */
if (!strstr(m, "CD-ROM") && strstr(m, "ZIP")) {
printk(KERN_CONT "FLOPPY");
type = ide_floppy;
break;
}
#endif
printk(KERN_CONT "CD/DVD-ROM");
break;
case ide_tape:
printk(KERN_CONT "TAPE");
break;
case ide_optical:
printk(KERN_CONT "OPTICAL");
drive->dev_flags |= IDE_DFLAG_REMOVABLE;
break;
default:
printk(KERN_CONT "UNKNOWN (type %d)", type);
break;
}
printk(KERN_CONT " drive\n");
drive->media = type;
/* an ATAPI device ignores DRDY */
drive->ready_stat = 0;
if (ata_id_cdb_intr(id))
drive->atapi_flags |= IDE_AFLAG_DRQ_INTERRUPT;
/* we don't do head unloading on ATAPI devices */
drive->dev_flags |= IDE_DFLAG_NO_UNLOAD;
return;
}
/*
* Not an ATAPI device: looks like a "regular" hard disk
*/
is_cfa = ata_id_is_cfa(id);
/* CF devices are *not* removable in Linux definition of the term */
if (is_cfa == 0 && (id[ATA_ID_CONFIG] & (1 << 7)))
drive->dev_flags |= IDE_DFLAG_REMOVABLE;
drive->media = ide_disk;
if (!ata_id_has_unload(drive->id))
drive->dev_flags |= IDE_DFLAG_NO_UNLOAD;
printk(KERN_CONT "%s DISK drive\n", is_cfa ? "CFA" : "ATA");
return;
err_misc:
kfree(id);
drive->dev_flags &= ~IDE_DFLAG_PRESENT;
return;
}
/**
* actual_try_to_identify - send ata/atapi identify
* @drive: drive to identify
* @cmd: command to use
*
* try_to_identify() sends an ATA(PI) IDENTIFY request to a drive
* and waits for a response. It also monitors irqs while this is
* happening, in hope of automatically determining which one is
* being used by the interface.
*
* Returns: 0 device was identified
* 1 device timed-out (no response to identify request)
* 2 device aborted the command (refused to identify itself)
*/
static int actual_try_to_identify (ide_drive_t *drive, u8 cmd)
{
ide_hwif_t *hwif = HWIF(drive);
struct ide_io_ports *io_ports = &hwif->io_ports;
const struct ide_tp_ops *tp_ops = hwif->tp_ops;
int use_altstatus = 0, rc;
unsigned long timeout;
u8 s = 0, a = 0;
/* take a deep breath */
msleep(50);
if (io_ports->ctl_addr) {
a = tp_ops->read_altstatus(hwif);
s = tp_ops->read_status(hwif);
if ((a ^ s) & ~ATA_IDX)
/* ancient Seagate drives, broken interfaces */
printk(KERN_INFO "%s: probing with STATUS(0x%02x) "
"instead of ALTSTATUS(0x%02x)\n",
drive->name, s, a);
else
/* use non-intrusive polling */
use_altstatus = 1;
}
/* set features register for atapi
* identify command to be sure of reply
*/
if (cmd == ATA_CMD_ID_ATAPI) {
ide_task_t task;
memset(&task, 0, sizeof(task));
/* disable DMA & overlap */
task.tf_flags = IDE_TFLAG_OUT_FEATURE;
tp_ops->tf_load(drive, &task);
}
/* ask drive for ID */
tp_ops->exec_command(hwif, cmd);
timeout = ((cmd == ATA_CMD_ID_ATA) ? WAIT_WORSTCASE : WAIT_PIDENTIFY) / 2;
if (ide_busy_sleep(hwif, timeout, use_altstatus))
return 1;
/* wait for IRQ and ATA_DRQ */
msleep(50);
s = tp_ops->read_status(hwif);
if (OK_STAT(s, ATA_DRQ, BAD_R_STAT)) {
unsigned long flags;
/* local CPU only; some systems need this */
local_irq_save(flags);
/* drive returned ID */
do_identify(drive, cmd);
/* drive responded with ID */
rc = 0;
/* clear drive IRQ */
(void)tp_ops->read_status(hwif);
local_irq_restore(flags);
} else {
/* drive refused ID */
rc = 2;
}
return rc;
}
/**
* try_to_identify - try to identify a drive
* @drive: drive to probe
* @cmd: command to use
*
* Issue the identify command and then do IRQ probing to
* complete the identification when needed by finding the
* IRQ the drive is attached to
*/
static int try_to_identify (ide_drive_t *drive, u8 cmd)
{
ide_hwif_t *hwif = HWIF(drive);
const struct ide_tp_ops *tp_ops = hwif->tp_ops;
int retval;
int autoprobe = 0;
unsigned long cookie = 0;
/*
* Disable device irq unless we need to
* probe for it. Otherwise we'll get spurious
* interrupts during the identify-phase that
* the irq handler isn't expecting.
*/
if (hwif->io_ports.ctl_addr) {
if (!hwif->irq) {
autoprobe = 1;
cookie = probe_irq_on();
}
tp_ops->set_irq(hwif, autoprobe);
}
retval = actual_try_to_identify(drive, cmd);
if (autoprobe) {
int irq;
tp_ops->set_irq(hwif, 0);
/* clear drive IRQ */
(void)tp_ops->read_status(hwif);
udelay(5);
irq = probe_irq_off(cookie);
if (!hwif->irq) {
if (irq > 0) {
hwif->irq = irq;
} else {
/* Mmmm.. multiple IRQs..
* don't know which was ours
*/
printk(KERN_ERR "%s: IRQ probe failed (0x%lx)\n",
drive->name, cookie);
}
}
}
return retval;
}
int ide_busy_sleep(ide_hwif_t *hwif, unsigned long timeout, int altstatus)
{
u8 stat;
timeout += jiffies;
do {
msleep(50); /* give drive a breather */
stat = altstatus ? hwif->tp_ops->read_altstatus(hwif)
: hwif->tp_ops->read_status(hwif);
if ((stat & ATA_BUSY) == 0)
return 0;
} while (time_before(jiffies, timeout));
return 1; /* drive timed-out */
}
static u8 ide_read_device(ide_drive_t *drive)
{
ide_task_t task;
memset(&task, 0, sizeof(task));
task.tf_flags = IDE_TFLAG_IN_DEVICE;
drive->hwif->tp_ops->tf_read(drive, &task);
return task.tf.device;
}
/**
* do_probe - probe an IDE device
* @drive: drive to probe
* @cmd: command to use
*
* do_probe() has the difficult job of finding a drive if it exists,
* without getting hung up if it doesn't exist, without trampling on
* ethernet cards, and without leaving any IRQs dangling to haunt us later.
*
* If a drive is "known" to exist (from CMOS or kernel parameters),
* but does not respond right away, the probe will "hang in there"
* for the maximum wait time (about 30 seconds), otherwise it will
* exit much more quickly.
*
* Returns: 0 device was identified
* 1 device timed-out (no response to identify request)
* 2 device aborted the command (refused to identify itself)
* 3 bad status from device (possible for ATAPI drives)
* 4 probe was not attempted because failure was obvious
*/
static int do_probe (ide_drive_t *drive, u8 cmd)
{
ide_hwif_t *hwif = HWIF(drive);
const struct ide_tp_ops *tp_ops = hwif->tp_ops;
int rc;
u8 present = !!(drive->dev_flags & IDE_DFLAG_PRESENT), stat;
/* avoid waiting for inappropriate probes */
if (present && drive->media != ide_disk && cmd == ATA_CMD_ID_ATA)
return 4;
#ifdef DEBUG
printk(KERN_INFO "probing for %s: present=%d, media=%d, probetype=%s\n",
drive->name, present, drive->media,
(cmd == ATA_CMD_ID_ATA) ? "ATA" : "ATAPI");
#endif
/* needed for some systems
* (e.g. crw9624 as drive0 with disk as slave)
*/
msleep(50);
SELECT_DRIVE(drive);
msleep(50);
if (ide_read_device(drive) != drive->select && present == 0) {
if (drive->dn & 1) {
/* exit with drive0 selected */
SELECT_DRIVE(&hwif->drives[0]);
/* allow ATA_BUSY to assert & clear */
msleep(50);
}
/* no i/f present: mmm.. this should be a 4 -ml */
return 3;
}
stat = tp_ops->read_status(hwif);
if (OK_STAT(stat, ATA_DRDY, ATA_BUSY) ||
present || cmd == ATA_CMD_ID_ATAPI) {
/* send cmd and wait */
if ((rc = try_to_identify(drive, cmd))) {
/* failed: try again */
rc = try_to_identify(drive,cmd);
}
stat = tp_ops->read_status(hwif);
if (stat == (ATA_BUSY | ATA_DRDY))
return 4;
if (rc == 1 && cmd == ATA_CMD_ID_ATAPI) {
printk(KERN_ERR "%s: no response (status = 0x%02x), "
"resetting drive\n", drive->name, stat);
msleep(50);
SELECT_DRIVE(drive);
msleep(50);
tp_ops->exec_command(hwif, ATA_CMD_DEV_RESET);
(void)ide_busy_sleep(hwif, WAIT_WORSTCASE, 0);
rc = try_to_identify(drive, cmd);
}
/* ensure drive IRQ is clear */
stat = tp_ops->read_status(hwif);
if (rc == 1)
printk(KERN_ERR "%s: no response (status = 0x%02x)\n",
drive->name, stat);
} else {
/* not present or maybe ATAPI */
rc = 3;
}
if (drive->dn & 1) {
/* exit with drive0 selected */
SELECT_DRIVE(&hwif->drives[0]);
msleep(50);
/* ensure drive irq is clear */
(void)tp_ops->read_status(hwif);
}
return rc;
}
/*
*
*/
static void enable_nest (ide_drive_t *drive)
{
ide_hwif_t *hwif = HWIF(drive);
const struct ide_tp_ops *tp_ops = hwif->tp_ops;
u8 stat;
printk(KERN_INFO "%s: enabling %s -- ",
hwif->name, (char *)&drive->id[ATA_ID_PROD]);
SELECT_DRIVE(drive);
msleep(50);
tp_ops->exec_command(hwif, ATA_EXABYTE_ENABLE_NEST);
if (ide_busy_sleep(hwif, WAIT_WORSTCASE, 0)) {
printk(KERN_CONT "failed (timeout)\n");
return;
}
msleep(50);
stat = tp_ops->read_status(hwif);
if (!OK_STAT(stat, 0, BAD_STAT))
printk(KERN_CONT "failed (status = 0x%02x)\n", stat);
else
printk(KERN_CONT "success\n");
}
/**
* probe_for_drives - upper level drive probe
* @drive: drive to probe for
*
* probe_for_drive() tests for existence of a given drive using do_probe()
* and presents things to the user as needed.
*
* Returns: 0 no device was found
* 1 device was found
* (note: IDE_DFLAG_PRESENT might still be not set)
*/
static inline u8 probe_for_drive (ide_drive_t *drive)
{
char *m;
/*
* In order to keep things simple we have an id
* block for all drives at all times. If the device
* is pre ATA or refuses ATA/ATAPI identify we
* will add faked data to this.
*
* Also note that 0 everywhere means "can't do X"
*/
drive->dev_flags &= ~IDE_DFLAG_ID_READ;
drive->id = kzalloc(SECTOR_SIZE, GFP_KERNEL);
if (drive->id == NULL) {
printk(KERN_ERR "ide: out of memory for id data.\n");
return 0;
}
m = (char *)&drive->id[ATA_ID_PROD];
strcpy(m, "UNKNOWN");
/* skip probing? */
if ((drive->dev_flags & IDE_DFLAG_NOPROBE) == 0) {
retry:
/* if !(success||timed-out) */
if (do_probe(drive, ATA_CMD_ID_ATA) >= 2)
/* look for ATAPI device */
(void)do_probe(drive, ATA_CMD_ID_ATAPI);
if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0)
/* drive not found */
return 0;
if (strstr(m, "E X A B Y T E N E S T")) {
enable_nest(drive);
goto retry;
}
/* identification failed? */
if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) {
if (drive->media == ide_disk) {
printk(KERN_INFO "%s: non-IDE drive, CHS=%d/%d/%d\n",
drive->name, drive->cyl,
drive->head, drive->sect);
} else if (drive->media == ide_cdrom) {
printk(KERN_INFO "%s: ATAPI cdrom (?)\n", drive->name);
} else {
/* nuke it */
printk(KERN_WARNING "%s: Unknown device on bus refused identification. Ignoring.\n", drive->name);
drive->dev_flags &= ~IDE_DFLAG_PRESENT;
}
}
/* drive was found */
}
if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0)
return 0;
/* The drive wasn't being helpful. Add generic info only */
if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) {
generic_id(drive);
return 1;
}
if (drive->media == ide_disk) {
ide_disk_init_chs(drive);
ide_disk_init_mult_count(drive);
}
return !!(drive->dev_flags & IDE_DFLAG_PRESENT);
}
static void hwif_release_dev(struct device *dev)
{
ide_hwif_t *hwif = container_of(dev, ide_hwif_t, gendev);
complete(&hwif->gendev_rel_comp);
}
static int ide_register_port(ide_hwif_t *hwif)
{
int ret;
/* register with global device tree */
strlcpy(hwif->gendev.bus_id,hwif->name,BUS_ID_SIZE);
hwif->gendev.driver_data = hwif;
if (hwif->gendev.parent == NULL) {
if (hwif->dev)
hwif->gendev.parent = hwif->dev;
else
/* Would like to do = &device_legacy */
hwif->gendev.parent = NULL;
}
hwif->gendev.release = hwif_release_dev;
ret = device_register(&hwif->gendev);
if (ret < 0) {
printk(KERN_WARNING "IDE: %s: device_register error: %d\n",
__func__, ret);
goto out;
}
hwif->portdev = device_create_drvdata(ide_port_class, &hwif->gendev,
MKDEV(0, 0), hwif, hwif->name);
if (IS_ERR(hwif->portdev)) {
ret = PTR_ERR(hwif->portdev);
device_unregister(&hwif->gendev);
}
out:
return ret;
}
/**
* ide_port_wait_ready - wait for port to become ready
* @hwif: IDE port
*
* This is needed on some PPCs and a bunch of BIOS-less embedded
* platforms. Typical cases are:
*
* - The firmware hard reset the disk before booting the kernel,
* the drive is still doing it's poweron-reset sequence, that
* can take up to 30 seconds.
*
* - The firmware does nothing (or no firmware), the device is
* still in POST state (same as above actually).
*
* - Some CD/DVD/Writer combo drives tend to drive the bus during
* their reset sequence even when they are non-selected slave
* devices, thus preventing discovery of the main HD.
*
* Doing this wait-for-non-busy should not harm any existing
* configuration and fix some issues like the above.
*
* BenH.
*
* Returns 0 on success, error code (< 0) otherwise.
*/
static int ide_port_wait_ready(ide_hwif_t *hwif)
{
int unit, rc;
printk(KERN_DEBUG "Probing IDE interface %s...\n", hwif->name);
/* Let HW settle down a bit from whatever init state we
* come from */
mdelay(2);
/* Wait for BSY bit to go away, spec timeout is 30 seconds,
* I know of at least one disk who takes 31 seconds, I use 35
* here to be safe
*/
rc = ide_wait_not_busy(hwif, 35000);
if (rc)
return rc;
/* Now make sure both master & slave are ready */
for (unit = 0; unit < MAX_DRIVES; unit++) {
ide_drive_t *drive = &hwif->drives[unit];
/* Ignore disks that we will not probe for later. */
if ((drive->dev_flags & IDE_DFLAG_NOPROBE) == 0 ||
(drive->dev_flags & IDE_DFLAG_PRESENT)) {
SELECT_DRIVE(drive);
hwif->tp_ops->set_irq(hwif, 1);
mdelay(2);
rc = ide_wait_not_busy(hwif, 35000);
if (rc)
goto out;
} else
printk(KERN_DEBUG "%s: ide_wait_not_busy() skipped\n",
drive->name);
}
out:
/* Exit function with master reselected (let's be sane) */
if (unit)
SELECT_DRIVE(&hwif->drives[0]);
return rc;
}
/**
* ide_undecoded_slave - look for bad CF adapters
* @dev1: slave device
*
* Analyse the drives on the interface and attempt to decide if we
* have the same drive viewed twice. This occurs with crap CF adapters
* and PCMCIA sometimes.
*/
void ide_undecoded_slave(ide_drive_t *dev1)
{
ide_drive_t *dev0 = &dev1->hwif->drives[0];
if ((dev1->dn & 1) == 0 || (dev0->dev_flags & IDE_DFLAG_PRESENT) == 0)
return;
/* If the models don't match they are not the same product */
if (strcmp((char *)&dev0->id[ATA_ID_PROD],
(char *)&dev1->id[ATA_ID_PROD]))
return;
/* Serial numbers do not match */
if (strncmp((char *)&dev0->id[ATA_ID_SERNO],
(char *)&dev1->id[ATA_ID_SERNO], ATA_ID_SERNO_LEN))
return;
/* No serial number, thankfully very rare for CF */
if (*(char *)&dev0->id[ATA_ID_SERNO] == 0)
return;
/* Appears to be an IDE flash adapter with decode bugs */
printk(KERN_WARNING "ide-probe: ignoring undecoded slave\n");
dev1->dev_flags &= ~IDE_DFLAG_PRESENT;
}
EXPORT_SYMBOL_GPL(ide_undecoded_slave);
static int ide_probe_port(ide_hwif_t *hwif)
{
unsigned long flags;
unsigned int irqd;
int unit, rc = -ENODEV;
BUG_ON(hwif->present);
if ((hwif->drives[0].dev_flags & IDE_DFLAG_NOPROBE) &&
(hwif->drives[1].dev_flags & IDE_DFLAG_NOPROBE))
return -EACCES;
/*
* We must always disable IRQ, as probe_for_drive will assert IRQ, but
* we'll install our IRQ driver much later...
*/
irqd = hwif->irq;
if (irqd)
disable_irq(hwif->irq);
local_irq_set(flags);
if (ide_port_wait_ready(hwif) == -EBUSY)
printk(KERN_DEBUG "%s: Wait for ready failed before probe !\n", hwif->name);
/*
* Second drive should only exist if first drive was found,
* but a lot of cdrom drives are configured as single slaves.
*/
for (unit = 0; unit < MAX_DRIVES; ++unit) {
ide_drive_t *drive = &hwif->drives[unit];
(void) probe_for_drive(drive);
if (drive->dev_flags & IDE_DFLAG_PRESENT)
rc = 0;
}
local_irq_restore(flags);
/*
* Use cached IRQ number. It might be (and is...) changed by probe
* code above
*/
if (irqd)
enable_irq(irqd);
return rc;
}
static void ide_port_tune_devices(ide_hwif_t *hwif)
{
const struct ide_port_ops *port_ops = hwif->port_ops;
int unit;
for (unit = 0; unit < MAX_DRIVES; unit++) {
ide_drive_t *drive = &hwif->drives[unit];
if (drive->dev_flags & IDE_DFLAG_PRESENT) {
if (port_ops && port_ops->quirkproc)
port_ops->quirkproc(drive);
}
}
for (unit = 0; unit < MAX_DRIVES; ++unit) {
ide_drive_t *drive = &hwif->drives[unit];
if (drive->dev_flags & IDE_DFLAG_PRESENT) {
ide_set_max_pio(drive);
drive->dev_flags |= IDE_DFLAG_NICE1;
if (hwif->dma_ops)
ide_set_dma(drive);
}
}
for (unit = 0; unit < MAX_DRIVES; ++unit) {
ide_drive_t *drive = &hwif->drives[unit];
if ((hwif->host_flags & IDE_HFLAG_NO_IO_32BIT) ||
drive->id[ATA_ID_DWORD_IO])
drive->dev_flags |= IDE_DFLAG_NO_IO_32BIT;
else
drive->dev_flags &= ~IDE_DFLAG_NO_IO_32BIT;
}
}
/*
* save_match() is used to simplify logic in init_irq() below.
*
* A loophole here is that we may not know about a particular
* hwif's irq until after that hwif is actually probed/initialized..
* This could be a problem for the case where an hwif is on a
* dual interface that requires serialization (eg. cmd640) and another
* hwif using one of the same irqs is initialized beforehand.
*
* This routine detects and reports such situations, but does not fix them.
*/
static void save_match(ide_hwif_t *hwif, ide_hwif_t *new, ide_hwif_t **match)
{
ide_hwif_t *m = *match;
if (m && m->hwgroup && m->hwgroup != new->hwgroup) {
if (!new->hwgroup)
return;
printk(KERN_WARNING "%s: potential IRQ problem with %s and %s\n",
hwif->name, new->name, m->name);
}
if (!m || m->irq != hwif->irq) /* don't undo a prior perfect match */
*match = new;
}
/*
* init request queue
*/
static int ide_init_queue(ide_drive_t *drive)
{
struct request_queue *q;
ide_hwif_t *hwif = HWIF(drive);
int max_sectors = 256;
int max_sg_entries = PRD_ENTRIES;
/*
* Our default set up assumes the normal IDE case,
* that is 64K segmenting, standard PRD setup
* and LBA28. Some drivers then impose their own
* limits and LBA48 we could raise it but as yet
* do not.
*/
q = blk_init_queue_node(do_ide_request, &ide_lock, hwif_to_node(hwif));
if (!q)
return 1;
q->queuedata = drive;
blk_queue_segment_boundary(q, 0xffff);
if (hwif->rqsize < max_sectors)
max_sectors = hwif->rqsize;
blk_queue_max_sectors(q, max_sectors);
#ifdef CONFIG_PCI
/* When we have an IOMMU, we may have a problem where pci_map_sg()
* creates segments that don't completely match our boundary
* requirements and thus need to be broken up again. Because it
* doesn't align properly either, we may actually have to break up
* to more segments than what was we got in the first place, a max
* worst case is twice as many.
* This will be fixed once we teach pci_map_sg() about our boundary
* requirements, hopefully soon. *FIXME*
*/
if (!PCI_DMA_BUS_IS_PHYS)
max_sg_entries >>= 1;
#endif /* CONFIG_PCI */
blk_queue_max_hw_segments(q, max_sg_entries);
blk_queue_max_phys_segments(q, max_sg_entries);
/* assign drive queue */
drive->queue = q;
/* needs drive->queue to be set */
ide_toggle_bounce(drive, 1);
return 0;
}
static void ide_add_drive_to_hwgroup(ide_drive_t *drive)
{
ide_hwgroup_t *hwgroup = drive->hwif->hwgroup;
spin_lock_irq(&ide_lock);
if (!hwgroup->drive) {
/* first drive for hwgroup. */
drive->next = drive;
hwgroup->drive = drive;
hwgroup->hwif = HWIF(hwgroup->drive);
} else {
drive->next = hwgroup->drive->next;
hwgroup->drive->next = drive;
}
spin_unlock_irq(&ide_lock);
}
/*
* For any present drive:
* - allocate the block device queue
* - link drive into the hwgroup
*/
static int ide_port_setup_devices(ide_hwif_t *hwif)
{
int i, j = 0;
mutex_lock(&ide_cfg_mtx);
for (i = 0; i < MAX_DRIVES; i++) {
ide_drive_t *drive = &hwif->drives[i];
if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0)
continue;
if (ide_init_queue(drive)) {
printk(KERN_ERR "ide: failed to init %s\n",
drive->name);
kfree(drive->id);
drive->id = NULL;
drive->dev_flags &= ~IDE_DFLAG_PRESENT;
continue;
}
j++;
ide_add_drive_to_hwgroup(drive);
}
mutex_unlock(&ide_cfg_mtx);
return j;
}
static ide_hwif_t *ide_ports[MAX_HWIFS];
void ide_remove_port_from_hwgroup(ide_hwif_t *hwif)
{
ide_hwgroup_t *hwgroup = hwif->hwgroup;
ide_ports[hwif->index] = NULL;
spin_lock_irq(&ide_lock);
/*
* Remove us from the hwgroup, and free
* the hwgroup if we were the only member
*/
if (hwif->next == hwif) {
BUG_ON(hwgroup->hwif != hwif);
kfree(hwgroup);
} else {
/* There is another interface in hwgroup.
* Unlink us, and set hwgroup->drive and ->hwif to
* something sane.
*/
ide_hwif_t *g = hwgroup->hwif;
while (g->next != hwif)
g = g->next;
g->next = hwif->next;
if (hwgroup->hwif == hwif) {
/* Chose a random hwif for hwgroup->hwif.
* It's guaranteed that there are no drives
* left in the hwgroup.
*/
BUG_ON(hwgroup->drive != NULL);
hwgroup->hwif = g;
}
BUG_ON(hwgroup->hwif == hwif);
}
spin_unlock_irq(&ide_lock);
}
/*
* This routine sets up the irq for an ide interface, and creates a new
* hwgroup for the irq/hwif if none was previously assigned.
*
* Much of the code is for correctly detecting/handling irq sharing
* and irq serialization situations. This is somewhat complex because
* it handles static as well as dynamic (PCMCIA) IDE interfaces.
*/
static int init_irq (ide_hwif_t *hwif)
{
struct ide_io_ports *io_ports = &hwif->io_ports;
unsigned int index;
ide_hwgroup_t *hwgroup;
ide_hwif_t *match = NULL;
mutex_lock(&ide_cfg_mtx);
hwif->hwgroup = NULL;
/*
* Group up with any other hwifs that share our irq(s).
*/
for (index = 0; index < MAX_HWIFS; index++) {
ide_hwif_t *h = ide_ports[index];
if (h && h->hwgroup) { /* scan only initialized ports */
if (hwif->irq == h->irq) {
hwif->sharing_irq = h->sharing_irq = 1;
if (hwif->chipset != ide_pci ||
h->chipset != ide_pci) {
save_match(hwif, h, &match);
}
}
if (hwif->serialized) {
if (hwif->mate && hwif->mate->irq == h->irq)
save_match(hwif, h, &match);
}
if (h->serialized) {
if (h->mate && hwif->irq == h->mate->irq)
save_match(hwif, h, &match);
}
}
}
/*
* If we are still without a hwgroup, then form a new one
*/
if (match) {
hwgroup = match->hwgroup;
hwif->hwgroup = hwgroup;
/*
* Link us into the hwgroup.
* This must be done early, do ensure that unexpected_intr
* can find the hwif and prevent irq storms.
* No drives are attached to the new hwif, choose_drive
* can't do anything stupid (yet).
* Add ourself as the 2nd entry to the hwgroup->hwif
* linked list, the first entry is the hwif that owns
* hwgroup->handler - do not change that.
*/
spin_lock_irq(&ide_lock);
hwif->next = hwgroup->hwif->next;
hwgroup->hwif->next = hwif;
BUG_ON(hwif->next == hwif);
spin_unlock_irq(&ide_lock);
} else {
hwgroup = kmalloc_node(sizeof(*hwgroup), GFP_KERNEL|__GFP_ZERO,
hwif_to_node(hwif));
if (hwgroup == NULL)
goto out_up;
hwif->hwgroup = hwgroup;
hwgroup->hwif = hwif->next = hwif;
init_timer(&hwgroup->timer);
hwgroup->timer.function = &ide_timer_expiry;
hwgroup->timer.data = (unsigned long) hwgroup;
}
ide_ports[hwif->index] = hwif;
/*
* Allocate the irq, if not already obtained for another hwif
*/
if (!match || match->irq != hwif->irq) {
int sa = 0;
#if defined(__mc68000__)
sa = IRQF_SHARED;
#endif /* __mc68000__ */
if (hwif->chipset == ide_pci || hwif->chipset == ide_cmd646 ||
hwif->chipset == ide_ali14xx)
sa = IRQF_SHARED;
if (io_ports->ctl_addr)
hwif->tp_ops->set_irq(hwif, 1);
if (request_irq(hwif->irq,&ide_intr,sa,hwif->name,hwgroup))
goto out_unlink;
}
if (!hwif->rqsize) {
if ((hwif->host_flags & IDE_HFLAG_NO_LBA48) ||
(hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA))
hwif->rqsize = 256;
else
hwif->rqsize = 65536;
}
#if !defined(__mc68000__)
printk(KERN_INFO "%s at 0x%03lx-0x%03lx,0x%03lx on irq %d", hwif->name,
io_ports->data_addr, io_ports->status_addr,
io_ports->ctl_addr, hwif->irq);
#else
printk(KERN_INFO "%s at 0x%08lx on irq %d", hwif->name,
io_ports->data_addr, hwif->irq);
#endif /* __mc68000__ */
if (match)
printk(KERN_CONT " (%sed with %s)",
hwif->sharing_irq ? "shar" : "serializ", match->name);
printk(KERN_CONT "\n");
mutex_unlock(&ide_cfg_mtx);
return 0;
out_unlink:
ide_remove_port_from_hwgroup(hwif);
out_up:
mutex_unlock(&ide_cfg_mtx);
return 1;
}
static int ata_lock(dev_t dev, void *data)
{
/* FIXME: we want to pin hwif down */
return 0;
}
static struct kobject *ata_probe(dev_t dev, int *part, void *data)
{
ide_hwif_t *hwif = data;
int unit = *part >> PARTN_BITS;
ide_drive_t *drive = &hwif->drives[unit];
if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0)
return NULL;
if (drive->media == ide_disk)
request_module("ide-disk");
if (drive->dev_flags & IDE_DFLAG_SCSI)
request_module("ide-scsi");
if (drive->media == ide_cdrom || drive->media == ide_optical)
request_module("ide-cd");
if (drive->media == ide_tape)
request_module("ide-tape");
if (drive->media == ide_floppy)
request_module("ide-floppy");
return NULL;
}
static struct kobject *exact_match(dev_t dev, int *part, void *data)
{
struct gendisk *p = data;
*part &= (1 << PARTN_BITS) - 1;
return &disk_to_dev(p)->kobj;
}
static int exact_lock(dev_t dev, void *data)
{
struct gendisk *p = data;
if (!get_disk(p))
return -1;
return 0;
}
void ide_register_region(struct gendisk *disk)
{
blk_register_region(MKDEV(disk->major, disk->first_minor),
disk->minors, NULL, exact_match, exact_lock, disk);
}
EXPORT_SYMBOL_GPL(ide_register_region);
void ide_unregister_region(struct gendisk *disk)
{
blk_unregister_region(MKDEV(disk->major, disk->first_minor),
disk->minors);
}
EXPORT_SYMBOL_GPL(ide_unregister_region);
void ide_init_disk(struct gendisk *disk, ide_drive_t *drive)
{
ide_hwif_t *hwif = drive->hwif;
unsigned int unit = drive->dn & 1;
disk->major = hwif->major;
disk->first_minor = unit << PARTN_BITS;
sprintf(disk->disk_name, "hd%c", 'a' + hwif->index * MAX_DRIVES + unit);
disk->queue = drive->queue;
}
EXPORT_SYMBOL_GPL(ide_init_disk);
static void ide_remove_drive_from_hwgroup(ide_drive_t *drive)
{
ide_hwgroup_t *hwgroup = drive->hwif->hwgroup;
if (drive == drive->next) {
/* special case: last drive from hwgroup. */
BUG_ON(hwgroup->drive != drive);
hwgroup->drive = NULL;
} else {
ide_drive_t *walk;
walk = hwgroup->drive;
while (walk->next != drive)
walk = walk->next;
walk->next = drive->next;
if (hwgroup->drive == drive) {
hwgroup->drive = drive->next;
hwgroup->hwif = hwgroup->drive->hwif;
}
}
BUG_ON(hwgroup->drive == drive);
}
static void drive_release_dev (struct device *dev)
{
ide_drive_t *drive = container_of(dev, ide_drive_t, gendev);
ide_proc_unregister_device(drive);
spin_lock_irq(&ide_lock);
ide_remove_drive_from_hwgroup(drive);
kfree(drive->id);
drive->id = NULL;
drive->dev_flags &= ~IDE_DFLAG_PRESENT;
/* Messed up locking ... */
spin_unlock_irq(&ide_lock);
blk_cleanup_queue(drive->queue);
spin_lock_irq(&ide_lock);
drive->queue = NULL;
spin_unlock_irq(&ide_lock);
complete(&drive->gendev_rel_comp);
}
static int hwif_init(ide_hwif_t *hwif)
{
int old_irq;
if (!hwif->irq) {
hwif->irq = __ide_default_irq(hwif->io_ports.data_addr);
if (!hwif->irq) {
printk(KERN_ERR "%s: disabled, no IRQ\n", hwif->name);
return 0;
}
}
if (register_blkdev(hwif->major, hwif->name))
return 0;
if (!hwif->sg_max_nents)
hwif->sg_max_nents = PRD_ENTRIES;
hwif->sg_table = kmalloc(sizeof(struct scatterlist)*hwif->sg_max_nents,
GFP_KERNEL);
if (!hwif->sg_table) {
printk(KERN_ERR "%s: unable to allocate SG table.\n", hwif->name);
goto out;
}
sg_init_table(hwif->sg_table, hwif->sg_max_nents);
if (init_irq(hwif) == 0)
goto done;
old_irq = hwif->irq;
/*
* It failed to initialise. Find the default IRQ for
* this port and try that.
*/
hwif->irq = __ide_default_irq(hwif->io_ports.data_addr);
if (!hwif->irq) {
printk(KERN_ERR "%s: disabled, unable to get IRQ %d\n",
hwif->name, old_irq);
goto out;
}
if (init_irq(hwif)) {
printk(KERN_ERR "%s: probed IRQ %d and default IRQ %d failed\n",
hwif->name, old_irq, hwif->irq);
goto out;
}
printk(KERN_WARNING "%s: probed IRQ %d failed, using default\n",
hwif->name, hwif->irq);
done:
blk_register_region(MKDEV(hwif->major, 0), MAX_DRIVES << PARTN_BITS,
THIS_MODULE, ata_probe, ata_lock, hwif);
return 1;
out:
unregister_blkdev(hwif->major, hwif->name);
return 0;
}
static void hwif_register_devices(ide_hwif_t *hwif)
{
unsigned int i;
for (i = 0; i < MAX_DRIVES; i++) {
ide_drive_t *drive = &hwif->drives[i];
struct device *dev = &drive->gendev;
int ret;
if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0)
continue;
snprintf(dev->bus_id, BUS_ID_SIZE, "%u.%u", hwif->index, i);
dev->parent = &hwif->gendev;
dev->bus = &ide_bus_type;
dev->driver_data = drive;
dev->release = drive_release_dev;
ret = device_register(dev);
if (ret < 0)
printk(KERN_WARNING "IDE: %s: device_register error: "
"%d\n", __func__, ret);
}
}
static void ide_port_init_devices(ide_hwif_t *hwif)
{
const struct ide_port_ops *port_ops = hwif->port_ops;
int i;
for (i = 0; i < MAX_DRIVES; i++) {
ide_drive_t *drive = &hwif->drives[i];
drive->dn = i + hwif->channel * 2;
if (hwif->host_flags & IDE_HFLAG_IO_32BIT)
drive->io_32bit = 1;
if (hwif->host_flags & IDE_HFLAG_UNMASK_IRQS)
drive->dev_flags |= IDE_DFLAG_UNMASK;
if (hwif->host_flags & IDE_HFLAG_NO_UNMASK_IRQS)
drive->dev_flags |= IDE_DFLAG_NO_UNMASK;
if (port_ops && port_ops->init_dev)
port_ops->init_dev(drive);
}
}
static void ide_init_port(ide_hwif_t *hwif, unsigned int port,
const struct ide_port_info *d)
{
hwif->channel = port;
if (d->chipset)
hwif->chipset = d->chipset;
if (d->init_iops)
d->init_iops(hwif);
if ((!hwif->irq && (d->host_flags & IDE_HFLAG_LEGACY_IRQS)) ||
(d->host_flags & IDE_HFLAG_FORCE_LEGACY_IRQS))
hwif->irq = port ? 15 : 14;
/* ->host_flags may be set by ->init_iops (or even earlier...) */
hwif->host_flags |= d->host_flags;
hwif->pio_mask = d->pio_mask;
if (d->tp_ops)
hwif->tp_ops = d->tp_ops;
/* ->set_pio_mode for DTC2278 is currently limited to port 0 */
if (hwif->chipset != ide_dtc2278 || hwif->channel == 0)
hwif->port_ops = d->port_ops;
hwif->swdma_mask = d->swdma_mask;
hwif->mwdma_mask = d->mwdma_mask;
hwif->ultra_mask = d->udma_mask;
if ((d->host_flags & IDE_HFLAG_NO_DMA) == 0) {
int rc;
if (d->init_dma)
rc = d->init_dma(hwif, d);
else
rc = ide_hwif_setup_dma(hwif, d);
if (rc < 0) {
printk(KERN_INFO "%s: DMA disabled\n", hwif->name);
hwif->dma_base = 0;
hwif->swdma_mask = 0;
hwif->mwdma_mask = 0;
hwif->ultra_mask = 0;
} else if (d->dma_ops)
hwif->dma_ops = d->dma_ops;
}
if ((d->host_flags & IDE_HFLAG_SERIALIZE) ||
((d->host_flags & IDE_HFLAG_SERIALIZE_DMA) && hwif->dma_base)) {
if (hwif->mate)
hwif->mate->serialized = hwif->serialized = 1;
}
if (d->host_flags & IDE_HFLAG_RQSIZE_256)
hwif->rqsize = 256;
/* call chipset specific routine for each enabled port */
if (d->init_hwif)
d->init_hwif(hwif);
}
static void ide_port_cable_detect(ide_hwif_t *hwif)
{
const struct ide_port_ops *port_ops = hwif->port_ops;
if (port_ops && port_ops->cable_detect && (hwif->ultra_mask & 0x78)) {
if (hwif->cbl != ATA_CBL_PATA40_SHORT)
hwif->cbl = port_ops->cable_detect(hwif);
}
}
static ssize_t store_delete_devices(struct device *portdev,
struct device_attribute *attr,
const char *buf, size_t n)
{
ide_hwif_t *hwif = dev_get_drvdata(portdev);
if (strncmp(buf, "1", n))
return -EINVAL;
ide_port_unregister_devices(hwif);
return n;
};
static DEVICE_ATTR(delete_devices, S_IWUSR, NULL, store_delete_devices);
static ssize_t store_scan(struct device *portdev,
struct device_attribute *attr,
const char *buf, size_t n)
{
ide_hwif_t *hwif = dev_get_drvdata(portdev);
if (strncmp(buf, "1", n))
return -EINVAL;
ide_port_unregister_devices(hwif);
ide_port_scan(hwif);
return n;
};
static DEVICE_ATTR(scan, S_IWUSR, NULL, store_scan);
static struct device_attribute *ide_port_attrs[] = {
&dev_attr_delete_devices,
&dev_attr_scan,
NULL
};
static int ide_sysfs_register_port(ide_hwif_t *hwif)
{
int i, uninitialized_var(rc);
for (i = 0; ide_port_attrs[i]; i++) {
rc = device_create_file(hwif->portdev, ide_port_attrs[i]);
if (rc)
break;
}
return rc;
}
static unsigned int ide_indexes;
/**
* ide_find_port_slot - find free port slot
* @d: IDE port info
*
* Return the new port slot index or -ENOENT if we are out of free slots.
*/
static int ide_find_port_slot(const struct ide_port_info *d)
{
int idx = -ENOENT;
u8 bootable = (d && (d->host_flags & IDE_HFLAG_NON_BOOTABLE)) ? 0 : 1;
u8 i = (d && (d->host_flags & IDE_HFLAG_QD_2ND_PORT)) ? 1 : 0;;
/*
* Claim an unassigned slot.
*
* Give preference to claiming other slots before claiming ide0/ide1,
* just in case there's another interface yet-to-be-scanned
* which uses ports 0x1f0/0x170 (the ide0/ide1 defaults).
*
* Unless there is a bootable card that does not use the standard
* ports 0x1f0/0x170 (the ide0/ide1 defaults).
*/
mutex_lock(&ide_cfg_mtx);
if (bootable) {
if ((ide_indexes | i) != (1 << MAX_HWIFS) - 1)
idx = ffz(ide_indexes | i);
} else {
if ((ide_indexes | 3) != (1 << MAX_HWIFS) - 1)
idx = ffz(ide_indexes | 3);
else if ((ide_indexes & 3) != 3)
idx = ffz(ide_indexes);
}
if (idx >= 0)
ide_indexes |= (1 << idx);
mutex_unlock(&ide_cfg_mtx);
return idx;
}
static void ide_free_port_slot(int idx)
{
mutex_lock(&ide_cfg_mtx);
ide_indexes &= ~(1 << idx);
mutex_unlock(&ide_cfg_mtx);
}
struct ide_host *ide_host_alloc(const struct ide_port_info *d, hw_regs_t **hws)
{
struct ide_host *host;
int i;
host = kzalloc(sizeof(*host), GFP_KERNEL);
if (host == NULL)
return NULL;
for (i = 0; i < MAX_HOST_PORTS; i++) {
ide_hwif_t *hwif;
int idx;
if (hws[i] == NULL)
continue;
hwif = kzalloc(sizeof(*hwif), GFP_KERNEL);
if (hwif == NULL)
continue;
idx = ide_find_port_slot(d);
if (idx < 0) {
printk(KERN_ERR "%s: no free slot for interface\n",
d ? d->name : "ide");
kfree(hwif);
continue;
}
ide_init_port_data(hwif, idx);
hwif->host = host;
host->ports[i] = hwif;
host->n_ports++;
}
if (host->n_ports == 0) {
kfree(host);
return NULL;
}
if (hws[0])
host->dev[0] = hws[0]->dev;
if (d) {
host->init_chipset = d->init_chipset;
host->host_flags = d->host_flags;
}
return host;
}
EXPORT_SYMBOL_GPL(ide_host_alloc);
int ide_host_register(struct ide_host *host, const struct ide_port_info *d,
hw_regs_t **hws)
{
ide_hwif_t *hwif, *mate = NULL;
int i, j = 0;
for (i = 0; i < MAX_HOST_PORTS; i++) {
hwif = host->ports[i];
if (hwif == NULL) {
mate = NULL;
continue;
}
ide_init_port_hw(hwif, hws[i]);
ide_port_apply_params(hwif);
if (d == NULL) {
mate = NULL;
} else {
if ((i & 1) && mate) {
hwif->mate = mate;
mate->mate = hwif;
}
mate = (i & 1) ? NULL : hwif;
ide_init_port(hwif, i & 1, d);
ide_port_cable_detect(hwif);
}
ide_port_init_devices(hwif);
}
for (i = 0; i < MAX_HOST_PORTS; i++) {
hwif = host->ports[i];
if (hwif == NULL)
continue;
if (ide_probe_port(hwif) == 0)
hwif->present = 1;
if (hwif->chipset != ide_4drives || !hwif->mate ||
!hwif->mate->present)
ide_register_port(hwif);
if (hwif->present)
ide_port_tune_devices(hwif);
}
for (i = 0; i < MAX_HOST_PORTS; i++) {
hwif = host->ports[i];
if (hwif == NULL)
continue;
if (hwif_init(hwif) == 0) {
printk(KERN_INFO "%s: failed to initialize IDE "
"interface\n", hwif->name);
hwif->present = 0;
continue;
}
if (hwif->present)
if (ide_port_setup_devices(hwif) == 0) {
hwif->present = 0;
continue;
}
j++;
ide_acpi_init(hwif);
if (hwif->present)
ide_acpi_port_init_devices(hwif);
}
for (i = 0; i < MAX_HOST_PORTS; i++) {
hwif = host->ports[i];
if (hwif == NULL)
continue;
if (hwif->chipset == ide_unknown)
hwif->chipset = ide_generic;
if (hwif->present)
hwif_register_devices(hwif);
}
for (i = 0; i < MAX_HOST_PORTS; i++) {
hwif = host->ports[i];
if (hwif == NULL)
continue;
ide_sysfs_register_port(hwif);
ide_proc_register_port(hwif);
if (hwif->present)
ide_proc_port_register_devices(hwif);
}
return j ? 0 : -1;
}
EXPORT_SYMBOL_GPL(ide_host_register);
int ide_host_add(const struct ide_port_info *d, hw_regs_t **hws,
struct ide_host **hostp)
{
struct ide_host *host;
int rc;
host = ide_host_alloc(d, hws);
if (host == NULL)
return -ENOMEM;
rc = ide_host_register(host, d, hws);
if (rc) {
ide_host_free(host);
return rc;
}
if (hostp)
*hostp = host;
return 0;
}
EXPORT_SYMBOL_GPL(ide_host_add);
void ide_host_free(struct ide_host *host)
{
ide_hwif_t *hwif;
int i;
for (i = 0; i < MAX_HOST_PORTS; i++) {
hwif = host->ports[i];
if (hwif == NULL)
continue;
ide_free_port_slot(hwif->index);
kfree(hwif);
}
kfree(host);
}
EXPORT_SYMBOL_GPL(ide_host_free);
void ide_host_remove(struct ide_host *host)
{
int i;
for (i = 0; i < MAX_HOST_PORTS; i++) {
if (host->ports[i])
ide_unregister(host->ports[i]);
}
ide_host_free(host);
}
EXPORT_SYMBOL_GPL(ide_host_remove);
void ide_port_scan(ide_hwif_t *hwif)
{
ide_port_apply_params(hwif);
ide_port_cable_detect(hwif);
ide_port_init_devices(hwif);
if (ide_probe_port(hwif) < 0)
return;
hwif->present = 1;
ide_port_tune_devices(hwif);
ide_acpi_port_init_devices(hwif);
ide_port_setup_devices(hwif);
hwif_register_devices(hwif);
ide_proc_port_register_devices(hwif);
}
EXPORT_SYMBOL_GPL(ide_port_scan);
static void ide_legacy_init_one(hw_regs_t **hws, hw_regs_t *hw,
u8 port_no, const struct ide_port_info *d,
unsigned long config)
{
unsigned long base, ctl;
int irq;
if (port_no == 0) {
base = 0x1f0;
ctl = 0x3f6;
irq = 14;
} else {
base = 0x170;
ctl = 0x376;
irq = 15;
}
if (!request_region(base, 8, d->name)) {
printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
d->name, base, base + 7);
return;
}
if (!request_region(ctl, 1, d->name)) {
printk(KERN_ERR "%s: I/O resource 0x%lX not free.\n",
d->name, ctl);
release_region(base, 8);
return;
}
ide_std_init_ports(hw, base, ctl);
hw->irq = irq;
hw->chipset = d->chipset;
hw->config = config;
hws[port_no] = hw;
}
int ide_legacy_device_add(const struct ide_port_info *d, unsigned long config)
{
hw_regs_t hw[2], *hws[] = { NULL, NULL, NULL, NULL };
memset(&hw, 0, sizeof(hw));
if ((d->host_flags & IDE_HFLAG_QD_2ND_PORT) == 0)
ide_legacy_init_one(hws, &hw[0], 0, d, config);
ide_legacy_init_one(hws, &hw[1], 1, d, config);
if (hws[0] == NULL && hws[1] == NULL &&
(d->host_flags & IDE_HFLAG_SINGLE))
return -ENOENT;
return ide_host_add(d, hws, NULL);
}
EXPORT_SYMBOL_GPL(ide_legacy_device_add);
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