v4.19.13 snapshot.
diff --git a/drivers/ide/ide-probe.c b/drivers/ide/ide-probe.c
new file mode 100644
index 0000000..3b75a7b
--- /dev/null
+++ b/drivers/ide/ide-probe.c
@@ -0,0 +1,1634 @@
+/*
+ * 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 <linux/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_flags |= IDE_SFLAG_SET_MULTMODE;
+ }
+}
+
+static void ide_classify_ata_dev(ide_drive_t *drive)
+{
+ u16 *id = drive->id;
+ char *m = (char *)&id[ATA_ID_PROD];
+ int 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_INFO "%s: %s, %s DISK drive\n", drive->name, m,
+ is_cfa ? "CFA" : "ATA");
+}
+
+static void ide_classify_atapi_dev(ide_drive_t *drive)
+{
+ u16 *id = drive->id;
+ char *m = (char *)&id[ATA_ID_PROD];
+ u8 type = (id[ATA_ID_CONFIG] >> 8) & 0x1f;
+
+ printk(KERN_INFO "%s: %s, ATAPI ", drive->name, m);
+ 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;
+ /* fall through */
+ 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;
+ drive->dev_flags |= IDE_DFLAG_DOORLOCKING;
+ /* we don't do head unloading on ATAPI devices */
+ drive->dev_flags |= IDE_DFLAG_NO_UNLOAD;
+}
+
+/**
+ * do_identify - identify a drive
+ * @drive: drive to identify
+ * @cmd: command used
+ * @id: buffer for IDENTIFY data
+ *
+ * Called when we have issued a drive identify command to
+ * read and parse the results. This function is run with
+ * interrupts disabled.
+ */
+
+static void do_identify(ide_drive_t *drive, u8 cmd, u16 *id)
+{
+ ide_hwif_t *hwif = drive->hwif;
+ char *m = (char *)&id[ATA_ID_PROD];
+ unsigned long flags;
+ int bswap = 1;
+
+ /* local CPU only; some systems need this */
+ local_irq_save(flags);
+ /* read 512 bytes of id info */
+ hwif->tp_ops->input_data(drive, NULL, id, SECTOR_SIZE);
+ local_irq_restore(flags);
+
+ drive->dev_flags |= IDE_DFLAG_ID_READ;
+#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"))
+ drive->dev_flags &= ~IDE_DFLAG_PRESENT;
+ else
+ drive->dev_flags |= IDE_DFLAG_PRESENT;
+}
+
+/**
+ * ide_dev_read_id - send ATA/ATAPI IDENTIFY command
+ * @drive: drive to identify
+ * @cmd: command to use
+ * @id: buffer for IDENTIFY data
+ * @irq_ctx: flag set when called from the IRQ context
+ *
+ * Sends an ATA(PI) IDENTIFY request to a drive and waits for a response.
+ *
+ * Returns: 0 device was identified
+ * 1 device timed-out (no response to identify request)
+ * 2 device aborted the command (refused to identify itself)
+ */
+
+int ide_dev_read_id(ide_drive_t *drive, u8 cmd, u16 *id, int irq_ctx)
+{
+ ide_hwif_t *hwif = drive->hwif;
+ 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;
+
+ /*
+ * Disable device IRQ. Otherwise we'll get spurious interrupts
+ * during the identify phase that the IRQ handler isn't expecting.
+ */
+ if (io_ports->ctl_addr)
+ tp_ops->write_devctl(hwif, ATA_NIEN | ATA_DEVCTL_OBS);
+
+ /* take a deep breath */
+ if (irq_ctx)
+ mdelay(50);
+ else
+ msleep(50);
+
+ if (io_ports->ctl_addr &&
+ (hwif->host_flags & IDE_HFLAG_BROKEN_ALTSTATUS) == 0) {
+ a = tp_ops->read_altstatus(hwif);
+ s = tp_ops->read_status(hwif);
+ if ((a ^ s) & ~ATA_SENSE)
+ /* 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) {
+ struct ide_taskfile tf;
+
+ memset(&tf, 0, sizeof(tf));
+ /* disable DMA & overlap */
+ tp_ops->tf_load(drive, &tf, IDE_VALID_FEATURE);
+ }
+
+ /* ask drive for ID */
+ tp_ops->exec_command(hwif, cmd);
+
+ timeout = ((cmd == ATA_CMD_ID_ATA) ? WAIT_WORSTCASE : WAIT_PIDENTIFY) / 2;
+
+ /* wait for IRQ and ATA_DRQ */
+ if (irq_ctx) {
+ rc = __ide_wait_stat(drive, ATA_DRQ, BAD_R_STAT, timeout, &s);
+ if (rc)
+ return 1;
+ } else {
+ rc = ide_busy_sleep(drive, timeout, use_altstatus);
+ if (rc)
+ return 1;
+
+ msleep(50);
+ s = tp_ops->read_status(hwif);
+ }
+
+ if (OK_STAT(s, ATA_DRQ, BAD_R_STAT)) {
+ /* drive returned ID */
+ do_identify(drive, cmd, id);
+ /* drive responded with ID */
+ rc = 0;
+ /* clear drive IRQ */
+ (void)tp_ops->read_status(hwif);
+ } else {
+ /* drive refused ID */
+ rc = 2;
+ }
+ return rc;
+}
+
+int ide_busy_sleep(ide_drive_t *drive, unsigned long timeout, int altstatus)
+{
+ ide_hwif_t *hwif = drive->hwif;
+ 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));
+
+ printk(KERN_ERR "%s: timeout in %s\n", drive->name, __func__);
+
+ return 1; /* drive timed-out */
+}
+
+static u8 ide_read_device(ide_drive_t *drive)
+{
+ struct ide_taskfile tf;
+
+ drive->hwif->tp_ops->tf_read(drive, &tf, IDE_VALID_DEVICE);
+
+ return 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 = drive->hwif;
+ const struct ide_tp_ops *tp_ops = hwif->tp_ops;
+ u16 *id = drive->id;
+ 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);
+ tp_ops->dev_select(drive);
+ msleep(50);
+
+ if (ide_read_device(drive) != drive->select && present == 0) {
+ if (drive->dn & 1) {
+ /* exit with drive0 selected */
+ tp_ops->dev_select(hwif->devices[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) {
+ rc = ide_dev_read_id(drive, cmd, id, 0);
+ if (rc)
+ /* failed: try again */
+ rc = ide_dev_read_id(drive, cmd, id, 0);
+
+ 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);
+ tp_ops->dev_select(drive);
+ msleep(50);
+ tp_ops->exec_command(hwif, ATA_CMD_DEV_RESET);
+ (void)ide_busy_sleep(drive, WAIT_WORSTCASE, 0);
+ rc = ide_dev_read_id(drive, cmd, id, 0);
+ }
+
+ /* 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 */
+ tp_ops->dev_select(hwif->devices[0]);
+ msleep(50);
+ /* ensure drive irq is clear */
+ (void)tp_ops->read_status(hwif);
+ }
+ return rc;
+}
+
+/**
+ * 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 u8 probe_for_drive(ide_drive_t *drive)
+{
+ char *m;
+ int rc;
+ u8 cmd;
+
+ drive->dev_flags &= ~IDE_DFLAG_ID_READ;
+
+ m = (char *)&drive->id[ATA_ID_PROD];
+ strcpy(m, "UNKNOWN");
+
+ /* skip probing? */
+ if ((drive->dev_flags & IDE_DFLAG_NOPROBE) == 0) {
+ /* if !(success||timed-out) */
+ cmd = ATA_CMD_ID_ATA;
+ rc = do_probe(drive, cmd);
+ if (rc >= 2) {
+ /* look for ATAPI device */
+ cmd = ATA_CMD_ID_ATAPI;
+ rc = do_probe(drive, cmd);
+ }
+
+ if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0)
+ return 0;
+
+ /* 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;
+ }
+ } else {
+ if (cmd == ATA_CMD_ID_ATAPI)
+ ide_classify_atapi_dev(drive);
+ else
+ ide_classify_ata_dev(drive);
+ }
+ }
+
+ 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 1;
+}
+
+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 */
+ dev_set_name(&hwif->gendev, "%s", hwif->name);
+ dev_set_drvdata(&hwif->gendev, hwif);
+ if (hwif->gendev.parent == NULL)
+ hwif->gendev.parent = hwif->dev;
+ 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(ide_port_class, &hwif->gendev,
+ MKDEV(0, 0), hwif, "%s", 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)
+{
+ const struct ide_tp_ops *tp_ops = hwif->tp_ops;
+ ide_drive_t *drive;
+ int i, 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 */
+ ide_port_for_each_dev(i, drive, hwif) {
+ /* Ignore disks that we will not probe for later. */
+ if ((drive->dev_flags & IDE_DFLAG_NOPROBE) == 0 ||
+ (drive->dev_flags & IDE_DFLAG_PRESENT)) {
+ tp_ops->dev_select(drive);
+ tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS);
+ 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 (i)
+ tp_ops->dev_select(hwif->devices[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->devices[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)
+{
+ ide_drive_t *drive;
+ unsigned int irqd;
+ int i, rc = -ENODEV;
+
+ BUG_ON(hwif->present);
+
+ if ((hwif->devices[0]->dev_flags & IDE_DFLAG_NOPROBE) &&
+ (hwif->devices[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);
+
+ 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.
+ */
+ ide_port_for_each_dev(i, drive, hwif) {
+ (void) probe_for_drive(drive);
+ if (drive->dev_flags & IDE_DFLAG_PRESENT)
+ rc = 0;
+ }
+
+ /*
+ * 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;
+ ide_drive_t *drive;
+ int i;
+
+ ide_port_for_each_present_dev(i, drive, hwif) {
+ ide_check_nien_quirk_list(drive);
+
+ if (port_ops && port_ops->quirkproc)
+ port_ops->quirkproc(drive);
+ }
+
+ ide_port_for_each_present_dev(i, drive, hwif) {
+ ide_set_max_pio(drive);
+
+ drive->dev_flags |= IDE_DFLAG_NICE1;
+
+ if (hwif->dma_ops)
+ ide_set_dma(drive);
+ }
+}
+
+static void ide_initialize_rq(struct request *rq)
+{
+ struct ide_request *req = blk_mq_rq_to_pdu(rq);
+
+ scsi_req_init(&req->sreq);
+ req->sreq.sense = req->sense;
+}
+
+/*
+ * init request queue
+ */
+static int ide_init_queue(ide_drive_t *drive)
+{
+ struct request_queue *q;
+ ide_hwif_t *hwif = drive->hwif;
+ 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_alloc_queue_node(GFP_KERNEL, hwif_to_node(hwif), NULL);
+ if (!q)
+ return 1;
+
+ q->request_fn = do_ide_request;
+ q->initialize_rq_fn = ide_initialize_rq;
+ q->cmd_size = sizeof(struct ide_request);
+ blk_queue_flag_set(QUEUE_FLAG_SCSI_PASSTHROUGH, q);
+ if (blk_init_allocated_queue(q) < 0) {
+ blk_cleanup_queue(q);
+ return 1;
+ }
+
+ q->queuedata = drive;
+ blk_queue_segment_boundary(q, 0xffff);
+
+ if (hwif->rqsize < max_sectors)
+ max_sectors = hwif->rqsize;
+ blk_queue_max_hw_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*
+ */
+ max_sg_entries >>= 1;
+#endif /* CONFIG_PCI */
+
+ blk_queue_max_segments(q, max_sg_entries);
+
+ /* assign drive queue */
+ drive->queue = q;
+
+ return 0;
+}
+
+static DEFINE_MUTEX(ide_cfg_mtx);
+
+/*
+ * For any present drive:
+ * - allocate the block device queue
+ */
+static int ide_port_setup_devices(ide_hwif_t *hwif)
+{
+ ide_drive_t *drive;
+ int i, j = 0;
+
+ mutex_lock(&ide_cfg_mtx);
+ ide_port_for_each_present_dev(i, drive, hwif) {
+ if (ide_init_queue(drive)) {
+ printk(KERN_ERR "ide: failed to init %s\n",
+ drive->name);
+ drive->dev_flags &= ~IDE_DFLAG_PRESENT;
+ continue;
+ }
+
+ j++;
+ }
+ mutex_unlock(&ide_cfg_mtx);
+
+ return j;
+}
+
+static void ide_host_enable_irqs(struct ide_host *host)
+{
+ ide_hwif_t *hwif;
+ int i;
+
+ ide_host_for_each_port(i, hwif, host) {
+ if (hwif == NULL)
+ continue;
+
+ /* clear any pending IRQs */
+ hwif->tp_ops->read_status(hwif);
+
+ /* unmask IRQs */
+ if (hwif->io_ports.ctl_addr)
+ hwif->tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS);
+ }
+}
+
+/*
+ * This routine sets up the IRQ for an IDE interface.
+ */
+static int init_irq (ide_hwif_t *hwif)
+{
+ struct ide_io_ports *io_ports = &hwif->io_ports;
+ struct ide_host *host = hwif->host;
+ irq_handler_t irq_handler = host->irq_handler;
+ int sa = host->irq_flags;
+
+ if (irq_handler == NULL)
+ irq_handler = ide_intr;
+
+ if (!host->get_lock)
+ if (request_irq(hwif->irq, irq_handler, sa, hwif->name, hwif))
+ goto out_up;
+
+#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 (hwif->host->host_flags & IDE_HFLAG_SERIALIZE)
+ printk(KERN_CONT " (serialized)");
+ printk(KERN_CONT "\n");
+
+ return 0;
+out_up:
+ 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->devices[unit];
+
+ if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0)
+ return NULL;
+
+ if (drive->media == ide_disk)
+ request_module("ide-disk");
+ 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_and_module(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 drive_release_dev (struct device *dev)
+{
+ ide_drive_t *drive = container_of(dev, ide_drive_t, gendev);
+
+ ide_proc_unregister_device(drive);
+
+ blk_cleanup_queue(drive->queue);
+ drive->queue = NULL;
+
+ drive->dev_flags &= ~IDE_DFLAG_PRESENT;
+
+ complete(&drive->gendev_rel_comp);
+}
+
+static int hwif_init(ide_hwif_t *hwif)
+{
+ 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_array(hwif->sg_max_nents,
+ sizeof(struct scatterlist),
+ 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)) {
+ printk(KERN_ERR "%s: disabled, unable to get IRQ %d\n",
+ hwif->name, hwif->irq);
+ goto out;
+ }
+
+ 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)
+{
+ ide_drive_t *drive;
+ unsigned int i;
+
+ ide_port_for_each_present_dev(i, drive, hwif) {
+ struct device *dev = &drive->gendev;
+ int ret;
+
+ dev_set_name(dev, "%u.%u", hwif->index, i);
+ dev_set_drvdata(dev, drive);
+ dev->parent = &hwif->gendev;
+ dev->bus = &ide_bus_type;
+ 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;
+ ide_drive_t *drive;
+ int i;
+
+ ide_port_for_each_dev(i, drive, hwif) {
+ drive->dn = i + hwif->channel * 2;
+
+ if (hwif->host_flags & IDE_HFLAG_IO_32BIT)
+ drive->io_32bit = 1;
+ if (hwif->host_flags & IDE_HFLAG_NO_IO_32BIT)
+ drive->dev_flags |= IDE_DFLAG_NO_IO_32BIT;
+ 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;
+
+ drive->pio_mode = XFER_PIO_0;
+
+ 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;
+
+ hwif->chipset = d->chipset ? d->chipset : ide_pci;
+
+ if (d->init_iops)
+ d->init_iops(hwif);
+
+ /* ->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->host_flags & IDE_HFLAG_DTC2278) == 0 || 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;
+
+ hwif->dma_ops = d->dma_ops;
+
+ 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_ops = NULL;
+ hwif->dma_base = 0;
+ hwif->swdma_mask = 0;
+ hwif->mwdma_mask = 0;
+ hwif->ultra_mask = 0;
+ }
+ }
+
+ if ((d->host_flags & IDE_HFLAG_SERIALIZE) ||
+ ((d->host_flags & IDE_HFLAG_SERIALIZE_DMA) && hwif->dma_base))
+ hwif->host->host_flags |= IDE_HFLAG_SERIALIZE;
+
+ if (d->max_sectors)
+ hwif->rqsize = d->max_sectors;
+ else {
+ if ((hwif->host_flags & IDE_HFLAG_NO_LBA48) ||
+ (hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA))
+ hwif->rqsize = 256;
+ else
+ hwif->rqsize = 65536;
+ }
+
+ /* 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 const u8 ide_hwif_to_major[] =
+ { IDE0_MAJOR, IDE1_MAJOR, IDE2_MAJOR, IDE3_MAJOR, IDE4_MAJOR,
+ IDE5_MAJOR, IDE6_MAJOR, IDE7_MAJOR, IDE8_MAJOR, IDE9_MAJOR };
+
+static void ide_port_init_devices_data(ide_hwif_t *hwif)
+{
+ ide_drive_t *drive;
+ int i;
+
+ ide_port_for_each_dev(i, drive, hwif) {
+ u8 j = (hwif->index * MAX_DRIVES) + i;
+ u16 *saved_id = drive->id;
+ struct request *saved_sense_rq = drive->sense_rq;
+
+ memset(drive, 0, sizeof(*drive));
+ memset(saved_id, 0, SECTOR_SIZE);
+ drive->id = saved_id;
+ drive->sense_rq = saved_sense_rq;
+
+ drive->media = ide_disk;
+ drive->select = (i << 4) | ATA_DEVICE_OBS;
+ drive->hwif = hwif;
+ drive->ready_stat = ATA_DRDY;
+ drive->bad_wstat = BAD_W_STAT;
+ drive->special_flags = IDE_SFLAG_RECALIBRATE |
+ IDE_SFLAG_SET_GEOMETRY;
+ drive->name[0] = 'h';
+ drive->name[1] = 'd';
+ drive->name[2] = 'a' + j;
+ drive->max_failures = IDE_DEFAULT_MAX_FAILURES;
+
+ INIT_LIST_HEAD(&drive->list);
+ init_completion(&drive->gendev_rel_comp);
+ }
+}
+
+static void ide_init_port_data(ide_hwif_t *hwif, unsigned int index)
+{
+ /* fill in any non-zero initial values */
+ hwif->index = index;
+ hwif->major = ide_hwif_to_major[index];
+
+ hwif->name[0] = 'i';
+ hwif->name[1] = 'd';
+ hwif->name[2] = 'e';
+ hwif->name[3] = '0' + index;
+
+ spin_lock_init(&hwif->lock);
+
+ timer_setup(&hwif->timer, ide_timer_expiry, 0);
+
+ init_completion(&hwif->gendev_rel_comp);
+
+ hwif->tp_ops = &default_tp_ops;
+
+ ide_port_init_devices_data(hwif);
+}
+
+static void ide_init_port_hw(ide_hwif_t *hwif, struct ide_hw *hw)
+{
+ memcpy(&hwif->io_ports, &hw->io_ports, sizeof(hwif->io_ports));
+ hwif->irq = hw->irq;
+ hwif->dev = hw->dev;
+ hwif->gendev.parent = hw->parent ? hw->parent : hw->dev;
+ hwif->config_data = hw->config;
+}
+
+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);
+}
+
+static void ide_port_free_devices(ide_hwif_t *hwif)
+{
+ ide_drive_t *drive;
+ int i;
+
+ ide_port_for_each_dev(i, drive, hwif) {
+ kfree(drive->sense_rq);
+ kfree(drive->id);
+ kfree(drive);
+ }
+}
+
+static int ide_port_alloc_devices(ide_hwif_t *hwif, int node)
+{
+ ide_drive_t *drive;
+ int i;
+
+ for (i = 0; i < MAX_DRIVES; i++) {
+ drive = kzalloc_node(sizeof(*drive), GFP_KERNEL, node);
+ if (drive == NULL)
+ goto out_nomem;
+
+ /*
+ * 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->id = kzalloc_node(SECTOR_SIZE, GFP_KERNEL, node);
+ if (drive->id == NULL)
+ goto out_free_drive;
+
+ drive->sense_rq = kmalloc(sizeof(struct request) +
+ sizeof(struct ide_request), GFP_KERNEL);
+ if (!drive->sense_rq)
+ goto out_free_id;
+
+ hwif->devices[i] = drive;
+ }
+ return 0;
+
+out_free_id:
+ kfree(drive->id);
+out_free_drive:
+ kfree(drive);
+out_nomem:
+ ide_port_free_devices(hwif);
+ return -ENOMEM;
+}
+
+struct ide_host *ide_host_alloc(const struct ide_port_info *d,
+ struct ide_hw **hws, unsigned int n_ports)
+{
+ struct ide_host *host;
+ struct device *dev = hws[0] ? hws[0]->dev : NULL;
+ int node = dev ? dev_to_node(dev) : -1;
+ int i;
+
+ host = kzalloc_node(sizeof(*host), GFP_KERNEL, node);
+ if (host == NULL)
+ return NULL;
+
+ for (i = 0; i < n_ports; i++) {
+ ide_hwif_t *hwif;
+ int idx;
+
+ if (hws[i] == NULL)
+ continue;
+
+ hwif = kzalloc_node(sizeof(*hwif), GFP_KERNEL, node);
+ if (hwif == NULL)
+ continue;
+
+ if (ide_port_alloc_devices(hwif, node) < 0) {
+ kfree(hwif);
+ continue;
+ }
+
+ idx = ide_find_port_slot(d);
+ if (idx < 0) {
+ printk(KERN_ERR "%s: no free slot for interface\n",
+ d ? d->name : "ide");
+ ide_port_free_devices(hwif);
+ 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;
+ }
+
+ host->dev[0] = dev;
+
+ if (d) {
+ host->init_chipset = d->init_chipset;
+ host->get_lock = d->get_lock;
+ host->release_lock = d->release_lock;
+ host->host_flags = d->host_flags;
+ host->irq_flags = d->irq_flags;
+ }
+
+ return host;
+}
+EXPORT_SYMBOL_GPL(ide_host_alloc);
+
+static void ide_port_free(ide_hwif_t *hwif)
+{
+ ide_port_free_devices(hwif);
+ ide_free_port_slot(hwif->index);
+ kfree(hwif);
+}
+
+static void ide_disable_port(ide_hwif_t *hwif)
+{
+ struct ide_host *host = hwif->host;
+ int i;
+
+ printk(KERN_INFO "%s: disabling port\n", hwif->name);
+
+ for (i = 0; i < MAX_HOST_PORTS; i++) {
+ if (host->ports[i] == hwif) {
+ host->ports[i] = NULL;
+ host->n_ports--;
+ }
+ }
+
+ ide_port_free(hwif);
+}
+
+int ide_host_register(struct ide_host *host, const struct ide_port_info *d,
+ struct ide_hw **hws)
+{
+ ide_hwif_t *hwif, *mate = NULL;
+ int i, j = 0;
+
+ ide_host_for_each_port(i, hwif, host) {
+ if (hwif == NULL) {
+ mate = NULL;
+ continue;
+ }
+
+ ide_init_port_hw(hwif, hws[i]);
+ ide_port_apply_params(hwif);
+
+ 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);
+
+ hwif->port_flags |= IDE_PFLAG_PROBING;
+
+ ide_port_init_devices(hwif);
+ }
+
+ ide_host_for_each_port(i, hwif, host) {
+ if (hwif == NULL)
+ continue;
+
+ if (ide_probe_port(hwif) == 0)
+ hwif->present = 1;
+
+ hwif->port_flags &= ~IDE_PFLAG_PROBING;
+
+ if ((hwif->host_flags & IDE_HFLAG_4DRIVES) == 0 ||
+ hwif->mate == NULL || hwif->mate->present == 0) {
+ if (ide_register_port(hwif)) {
+ ide_disable_port(hwif);
+ continue;
+ }
+ }
+
+ if (hwif->present)
+ ide_port_tune_devices(hwif);
+ }
+
+ ide_host_enable_irqs(host);
+
+ ide_host_for_each_port(i, hwif, host) {
+ if (hwif == NULL)
+ continue;
+
+ if (hwif_init(hwif) == 0) {
+ printk(KERN_INFO "%s: failed to initialize IDE "
+ "interface\n", hwif->name);
+ device_unregister(hwif->portdev);
+ device_unregister(&hwif->gendev);
+ ide_disable_port(hwif);
+ continue;
+ }
+
+ if (hwif->present)
+ if (ide_port_setup_devices(hwif) == 0) {
+ hwif->present = 0;
+ continue;
+ }
+
+ j++;
+
+ ide_acpi_init_port(hwif);
+
+ if (hwif->present)
+ ide_acpi_port_init_devices(hwif);
+ }
+
+ ide_host_for_each_port(i, hwif, host) {
+ if (hwif == NULL)
+ continue;
+
+ ide_sysfs_register_port(hwif);
+ ide_proc_register_port(hwif);
+
+ if (hwif->present) {
+ ide_proc_port_register_devices(hwif);
+ hwif_register_devices(hwif);
+ }
+ }
+
+ return j ? 0 : -1;
+}
+EXPORT_SYMBOL_GPL(ide_host_register);
+
+int ide_host_add(const struct ide_port_info *d, struct ide_hw **hws,
+ unsigned int n_ports, struct ide_host **hostp)
+{
+ struct ide_host *host;
+ int rc;
+
+ host = ide_host_alloc(d, hws, n_ports);
+ 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);
+
+static void __ide_port_unregister_devices(ide_hwif_t *hwif)
+{
+ ide_drive_t *drive;
+ int i;
+
+ ide_port_for_each_present_dev(i, drive, hwif) {
+ device_unregister(&drive->gendev);
+ wait_for_completion(&drive->gendev_rel_comp);
+ }
+}
+
+void ide_port_unregister_devices(ide_hwif_t *hwif)
+{
+ mutex_lock(&ide_cfg_mtx);
+ __ide_port_unregister_devices(hwif);
+ hwif->present = 0;
+ ide_port_init_devices_data(hwif);
+ mutex_unlock(&ide_cfg_mtx);
+}
+EXPORT_SYMBOL_GPL(ide_port_unregister_devices);
+
+/**
+ * ide_unregister - free an IDE interface
+ * @hwif: IDE interface
+ *
+ * Perform the final unregister of an IDE interface.
+ *
+ * Locking:
+ * The caller must not hold the IDE locks.
+ *
+ * It is up to the caller to be sure there is no pending I/O here,
+ * and that the interface will not be reopened (present/vanishing
+ * locking isn't yet done BTW).
+ */
+
+static void ide_unregister(ide_hwif_t *hwif)
+{
+ BUG_ON(in_interrupt());
+ BUG_ON(irqs_disabled());
+
+ mutex_lock(&ide_cfg_mtx);
+
+ if (hwif->present) {
+ __ide_port_unregister_devices(hwif);
+ hwif->present = 0;
+ }
+
+ ide_proc_unregister_port(hwif);
+
+ if (!hwif->host->get_lock)
+ free_irq(hwif->irq, hwif);
+
+ device_unregister(hwif->portdev);
+ device_unregister(&hwif->gendev);
+ wait_for_completion(&hwif->gendev_rel_comp);
+
+ /*
+ * Remove us from the kernel's knowledge
+ */
+ blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
+ kfree(hwif->sg_table);
+ unregister_blkdev(hwif->major, hwif->name);
+
+ ide_release_dma_engine(hwif);
+
+ mutex_unlock(&ide_cfg_mtx);
+}
+
+void ide_host_free(struct ide_host *host)
+{
+ ide_hwif_t *hwif;
+ int i;
+
+ ide_host_for_each_port(i, hwif, host) {
+ if (hwif)
+ ide_port_free(hwif);
+ }
+
+ kfree(host);
+}
+EXPORT_SYMBOL_GPL(ide_host_free);
+
+void ide_host_remove(struct ide_host *host)
+{
+ ide_hwif_t *hwif;
+ int i;
+
+ ide_host_for_each_port(i, hwif, host) {
+ if (hwif)
+ ide_unregister(hwif);
+ }
+
+ ide_host_free(host);
+}
+EXPORT_SYMBOL_GPL(ide_host_remove);
+
+void ide_port_scan(ide_hwif_t *hwif)
+{
+ int rc;
+
+ ide_port_apply_params(hwif);
+ ide_port_cable_detect(hwif);
+
+ hwif->port_flags |= IDE_PFLAG_PROBING;
+
+ ide_port_init_devices(hwif);
+
+ rc = ide_probe_port(hwif);
+
+ hwif->port_flags &= ~IDE_PFLAG_PROBING;
+
+ if (rc < 0)
+ return;
+
+ hwif->present = 1;
+
+ ide_port_tune_devices(hwif);
+ ide_port_setup_devices(hwif);
+ ide_acpi_port_init_devices(hwif);
+ hwif_register_devices(hwif);
+ ide_proc_port_register_devices(hwif);
+}
+EXPORT_SYMBOL_GPL(ide_port_scan);