| /* |
| * Copyright (C) 1994-1998 Linus Torvalds & authors (see below) |
| * Copyright (C) 2003-2005, 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 multiple IDE interface driver, as evolved from hd.c. |
| * It supports up to MAX_HWIFS IDE interfaces, on one or more IRQs |
| * (usually 14 & 15). |
| * There can be up to two drives per interface, as per the ATA-2 spec. |
| * |
| * ... |
| * |
| * From hd.c: |
| * | |
| * | It traverses the request-list, using interrupts to jump between functions. |
| * | As nearly all functions can be called within interrupts, we may not sleep. |
| * | Special care is recommended. Have Fun! |
| * | |
| * | modified by Drew Eckhardt to check nr of hd's from the CMOS. |
| * | |
| * | Thanks to Branko Lankester, lankeste@fwi.uva.nl, who found a bug |
| * | in the early extended-partition checks and added DM partitions. |
| * | |
| * | Early work on error handling by Mika Liljeberg (liljeber@cs.Helsinki.FI). |
| * | |
| * | IRQ-unmask, drive-id, multiple-mode, support for ">16 heads", |
| * | and general streamlining by Mark Lord (mlord@pobox.com). |
| * |
| * October, 1994 -- Complete line-by-line overhaul for linux 1.1.x, by: |
| * |
| * Mark Lord (mlord@pobox.com) (IDE Perf.Pkg) |
| * Delman Lee (delman@ieee.org) ("Mr. atdisk2") |
| * Scott Snyder (snyder@fnald0.fnal.gov) (ATAPI IDE cd-rom) |
| * |
| * This was a rewrite of just about everything from hd.c, though some original |
| * code is still sprinkled about. Think of it as a major evolution, with |
| * inspiration from lots of linux users, esp. hamish@zot.apana.org.au |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/types.h> |
| #include <linux/string.h> |
| #include <linux/kernel.h> |
| #include <linux/interrupt.h> |
| #include <linux/major.h> |
| #include <linux/errno.h> |
| #include <linux/genhd.h> |
| #include <linux/slab.h> |
| #include <linux/init.h> |
| #include <linux/pci.h> |
| #include <linux/ide.h> |
| #include <linux/hdreg.h> |
| #include <linux/completion.h> |
| #include <linux/device.h> |
| |
| |
| /* default maximum number of failures */ |
| #define IDE_DEFAULT_MAX_FAILURES 1 |
| |
| struct class *ide_port_class; |
| |
| 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 }; |
| |
| DEFINE_MUTEX(ide_cfg_mtx); |
| |
| __cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock); |
| EXPORT_SYMBOL(ide_lock); |
| |
| static void ide_port_init_devices_data(ide_hwif_t *); |
| |
| /* |
| * Do not even *think* about calling this! |
| */ |
| void ide_init_port_data(ide_hwif_t *hwif, unsigned int index) |
| { |
| /* bulk initialize hwif & drive info with zeros */ |
| memset(hwif, 0, sizeof(ide_hwif_t)); |
| |
| /* 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; |
| |
| init_completion(&hwif->gendev_rel_comp); |
| |
| hwif->tp_ops = &default_tp_ops; |
| |
| ide_port_init_devices_data(hwif); |
| } |
| |
| static void ide_port_init_devices_data(ide_hwif_t *hwif) |
| { |
| int unit; |
| |
| for (unit = 0; unit < MAX_DRIVES; ++unit) { |
| ide_drive_t *drive = &hwif->drives[unit]; |
| u8 j = (hwif->index * MAX_DRIVES) + unit; |
| |
| memset(drive, 0, sizeof(*drive)); |
| |
| drive->media = ide_disk; |
| drive->select.all = (unit<<4)|0xa0; |
| drive->hwif = hwif; |
| drive->ready_stat = ATA_DRDY; |
| drive->bad_wstat = BAD_W_STAT; |
| drive->special.b.recalibrate = 1; |
| drive->special.b.set_geometry = 1; |
| 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); |
| } |
| } |
| |
| /* Called with ide_lock held. */ |
| static void __ide_port_unregister_devices(ide_hwif_t *hwif) |
| { |
| int i; |
| |
| for (i = 0; i < MAX_DRIVES; i++) { |
| ide_drive_t *drive = &hwif->drives[i]; |
| |
| if (drive->present) { |
| spin_unlock_irq(&ide_lock); |
| device_unregister(&drive->gendev); |
| wait_for_completion(&drive->gendev_rel_comp); |
| spin_lock_irq(&ide_lock); |
| } |
| } |
| } |
| |
| void ide_port_unregister_devices(ide_hwif_t *hwif) |
| { |
| mutex_lock(&ide_cfg_mtx); |
| spin_lock_irq(&ide_lock); |
| __ide_port_unregister_devices(hwif); |
| hwif->present = 0; |
| ide_port_init_devices_data(hwif); |
| spin_unlock_irq(&ide_lock); |
| 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. At the moment |
| * we don't refcount interfaces so this will also get split up. |
| * |
| * Locking: |
| * The caller must not hold the IDE locks |
| * The drive present/vanishing is not yet properly locked |
| * Take care with the callbacks. These have been split to avoid |
| * deadlocking the IDE layer. The shutdown callback is called |
| * before we take the lock and free resources. 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). After we commit to the final kill we |
| * call the cleanup callback with the ide locks held. |
| * |
| * Unregister restores the hwif structures to the default state. |
| * This is raving bonkers. |
| */ |
| |
| void ide_unregister(ide_hwif_t *hwif) |
| { |
| ide_hwif_t *g; |
| ide_hwgroup_t *hwgroup; |
| int irq_count = 0; |
| |
| BUG_ON(in_interrupt()); |
| BUG_ON(irqs_disabled()); |
| |
| mutex_lock(&ide_cfg_mtx); |
| |
| spin_lock_irq(&ide_lock); |
| if (hwif->present) { |
| __ide_port_unregister_devices(hwif); |
| hwif->present = 0; |
| } |
| spin_unlock_irq(&ide_lock); |
| |
| ide_proc_unregister_port(hwif); |
| |
| hwgroup = hwif->hwgroup; |
| /* |
| * free the irq if we were the only hwif using it |
| */ |
| g = hwgroup->hwif; |
| do { |
| if (g->irq == hwif->irq) |
| ++irq_count; |
| g = g->next; |
| } while (g != hwgroup->hwif); |
| if (irq_count == 1) |
| free_irq(hwif->irq, hwgroup); |
| |
| ide_remove_port_from_hwgroup(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); |
| |
| if (hwif->dma_base) |
| ide_release_dma_engine(hwif); |
| |
| mutex_unlock(&ide_cfg_mtx); |
| } |
| |
| void ide_init_port_hw(ide_hwif_t *hwif, hw_regs_t *hw) |
| { |
| memcpy(&hwif->io_ports, &hw->io_ports, sizeof(hwif->io_ports)); |
| hwif->irq = hw->irq; |
| hwif->chipset = hw->chipset; |
| hwif->dev = hw->dev; |
| hwif->gendev.parent = hw->parent ? hw->parent : hw->dev; |
| hwif->ack_intr = hw->ack_intr; |
| hwif->config_data = hw->config; |
| } |
| |
| /* |
| * Locks for IDE setting functionality |
| */ |
| |
| DEFINE_MUTEX(ide_setting_mtx); |
| |
| /** |
| * ide_spin_wait_hwgroup - wait for group |
| * @drive: drive in the group |
| * |
| * Wait for an IDE device group to go non busy and then return |
| * holding the ide_lock which guards the hwgroup->busy status |
| * and right to use it. |
| */ |
| |
| int ide_spin_wait_hwgroup (ide_drive_t *drive) |
| { |
| ide_hwgroup_t *hwgroup = HWGROUP(drive); |
| unsigned long timeout = jiffies + (3 * HZ); |
| |
| spin_lock_irq(&ide_lock); |
| |
| while (hwgroup->busy) { |
| unsigned long lflags; |
| spin_unlock_irq(&ide_lock); |
| local_irq_set(lflags); |
| if (time_after(jiffies, timeout)) { |
| local_irq_restore(lflags); |
| printk(KERN_ERR "%s: channel busy\n", drive->name); |
| return -EBUSY; |
| } |
| local_irq_restore(lflags); |
| spin_lock_irq(&ide_lock); |
| } |
| return 0; |
| } |
| |
| EXPORT_SYMBOL(ide_spin_wait_hwgroup); |
| |
| ide_devset_get(io_32bit, io_32bit); |
| |
| int set_io_32bit(ide_drive_t *drive, int arg) |
| { |
| if (drive->no_io_32bit) |
| return -EPERM; |
| |
| if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1)) |
| return -EINVAL; |
| |
| if (ide_spin_wait_hwgroup(drive)) |
| return -EBUSY; |
| |
| drive->io_32bit = arg; |
| |
| spin_unlock_irq(&ide_lock); |
| |
| return 0; |
| } |
| |
| ide_devset_get(ksettings, keep_settings); |
| |
| int set_ksettings(ide_drive_t *drive, int arg) |
| { |
| if (arg < 0 || arg > 1) |
| return -EINVAL; |
| |
| if (ide_spin_wait_hwgroup(drive)) |
| return -EBUSY; |
| drive->keep_settings = arg; |
| spin_unlock_irq(&ide_lock); |
| |
| return 0; |
| } |
| |
| ide_devset_get(using_dma, using_dma); |
| |
| int set_using_dma(ide_drive_t *drive, int arg) |
| { |
| #ifdef CONFIG_BLK_DEV_IDEDMA |
| ide_hwif_t *hwif = drive->hwif; |
| int err = -EPERM; |
| |
| if (arg < 0 || arg > 1) |
| return -EINVAL; |
| |
| if (ata_id_has_dma(drive->id) == 0) |
| goto out; |
| |
| if (hwif->dma_ops == NULL) |
| goto out; |
| |
| err = -EBUSY; |
| if (ide_spin_wait_hwgroup(drive)) |
| goto out; |
| /* |
| * set ->busy flag, unlock and let it ride |
| */ |
| hwif->hwgroup->busy = 1; |
| spin_unlock_irq(&ide_lock); |
| |
| err = 0; |
| |
| if (arg) { |
| if (ide_set_dma(drive)) |
| err = -EIO; |
| } else |
| ide_dma_off(drive); |
| |
| /* |
| * lock, clear ->busy flag and unlock before leaving |
| */ |
| spin_lock_irq(&ide_lock); |
| hwif->hwgroup->busy = 0; |
| spin_unlock_irq(&ide_lock); |
| out: |
| return err; |
| #else |
| if (arg < 0 || arg > 1) |
| return -EINVAL; |
| |
| return -EPERM; |
| #endif |
| } |
| |
| int set_pio_mode(ide_drive_t *drive, int arg) |
| { |
| struct request *rq; |
| ide_hwif_t *hwif = drive->hwif; |
| const struct ide_port_ops *port_ops = hwif->port_ops; |
| |
| if (arg < 0 || arg > 255) |
| return -EINVAL; |
| |
| if (port_ops == NULL || port_ops->set_pio_mode == NULL || |
| (hwif->host_flags & IDE_HFLAG_NO_SET_MODE)) |
| return -ENOSYS; |
| |
| if (drive->special.b.set_tune) |
| return -EBUSY; |
| |
| rq = blk_get_request(drive->queue, READ, __GFP_WAIT); |
| rq->cmd_type = REQ_TYPE_ATA_TASKFILE; |
| |
| drive->tune_req = (u8) arg; |
| drive->special.b.set_tune = 1; |
| |
| blk_execute_rq(drive->queue, NULL, rq, 0); |
| blk_put_request(rq); |
| |
| return 0; |
| } |
| |
| ide_devset_get(unmaskirq, unmask); |
| |
| int set_unmaskirq(ide_drive_t *drive, int arg) |
| { |
| if (drive->no_unmask) |
| return -EPERM; |
| |
| if (arg < 0 || arg > 1) |
| return -EINVAL; |
| |
| if (ide_spin_wait_hwgroup(drive)) |
| return -EBUSY; |
| drive->unmask = arg; |
| spin_unlock_irq(&ide_lock); |
| |
| return 0; |
| } |
| |
| static int generic_ide_suspend(struct device *dev, pm_message_t mesg) |
| { |
| ide_drive_t *drive = dev->driver_data; |
| ide_hwif_t *hwif = HWIF(drive); |
| struct request *rq; |
| struct request_pm_state rqpm; |
| ide_task_t args; |
| int ret; |
| |
| /* Call ACPI _GTM only once */ |
| if (!(drive->dn % 2)) |
| ide_acpi_get_timing(hwif); |
| |
| memset(&rqpm, 0, sizeof(rqpm)); |
| memset(&args, 0, sizeof(args)); |
| rq = blk_get_request(drive->queue, READ, __GFP_WAIT); |
| rq->cmd_type = REQ_TYPE_PM_SUSPEND; |
| rq->special = &args; |
| rq->data = &rqpm; |
| rqpm.pm_step = ide_pm_state_start_suspend; |
| if (mesg.event == PM_EVENT_PRETHAW) |
| mesg.event = PM_EVENT_FREEZE; |
| rqpm.pm_state = mesg.event; |
| |
| ret = blk_execute_rq(drive->queue, NULL, rq, 0); |
| blk_put_request(rq); |
| /* only call ACPI _PS3 after both drivers are suspended */ |
| if (!ret && (((drive->dn % 2) && hwif->drives[0].present |
| && hwif->drives[1].present) |
| || !hwif->drives[0].present |
| || !hwif->drives[1].present)) |
| ide_acpi_set_state(hwif, 0); |
| return ret; |
| } |
| |
| static int generic_ide_resume(struct device *dev) |
| { |
| ide_drive_t *drive = dev->driver_data; |
| ide_hwif_t *hwif = HWIF(drive); |
| struct request *rq; |
| struct request_pm_state rqpm; |
| ide_task_t args; |
| int err; |
| |
| /* Call ACPI _STM only once */ |
| if (!(drive->dn % 2)) { |
| ide_acpi_set_state(hwif, 1); |
| ide_acpi_push_timing(hwif); |
| } |
| |
| ide_acpi_exec_tfs(drive); |
| |
| memset(&rqpm, 0, sizeof(rqpm)); |
| memset(&args, 0, sizeof(args)); |
| rq = blk_get_request(drive->queue, READ, __GFP_WAIT); |
| rq->cmd_type = REQ_TYPE_PM_RESUME; |
| rq->cmd_flags |= REQ_PREEMPT; |
| rq->special = &args; |
| rq->data = &rqpm; |
| rqpm.pm_step = ide_pm_state_start_resume; |
| rqpm.pm_state = PM_EVENT_ON; |
| |
| err = blk_execute_rq(drive->queue, NULL, rq, 1); |
| blk_put_request(rq); |
| |
| if (err == 0 && dev->driver) { |
| ide_driver_t *drv = to_ide_driver(dev->driver); |
| |
| if (drv->resume) |
| drv->resume(drive); |
| } |
| |
| return err; |
| } |
| |
| static int generic_drive_reset(ide_drive_t *drive) |
| { |
| struct request *rq; |
| int ret = 0; |
| |
| rq = blk_get_request(drive->queue, READ, __GFP_WAIT); |
| rq->cmd_type = REQ_TYPE_SPECIAL; |
| rq->cmd_len = 1; |
| rq->cmd[0] = REQ_DRIVE_RESET; |
| rq->cmd_flags |= REQ_SOFTBARRIER; |
| if (blk_execute_rq(drive->queue, NULL, rq, 1)) |
| ret = rq->errors; |
| blk_put_request(rq); |
| return ret; |
| } |
| |
| static int ide_get_identity_ioctl(ide_drive_t *drive, unsigned int cmd, |
| unsigned long arg) |
| { |
| u16 *id = NULL; |
| int size = (cmd == HDIO_GET_IDENTITY) ? (ATA_ID_WORDS * 2) : 142; |
| int rc = 0; |
| |
| if (drive->id_read == 0) { |
| rc = -ENOMSG; |
| goto out; |
| } |
| |
| id = kmalloc(size, GFP_KERNEL); |
| if (id == NULL) { |
| rc = -ENOMEM; |
| goto out; |
| } |
| |
| memcpy(id, drive->id, size); |
| ata_id_to_hd_driveid(id); |
| |
| if (copy_to_user((void __user *)arg, id, size)) |
| rc = -EFAULT; |
| |
| kfree(id); |
| out: |
| return rc; |
| } |
| |
| static int ide_get_nice_ioctl(ide_drive_t *drive, unsigned long arg) |
| { |
| return put_user((drive->dsc_overlap << IDE_NICE_DSC_OVERLAP) | |
| (drive->nice1 << IDE_NICE_1), (long __user *)arg); |
| } |
| |
| static int ide_set_nice_ioctl(ide_drive_t *drive, unsigned long arg) |
| { |
| if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1)))) |
| return -EPERM; |
| |
| if (((arg >> IDE_NICE_DSC_OVERLAP) & 1) && |
| (drive->media == ide_disk || drive->media == ide_floppy || |
| drive->scsi)) |
| return -EPERM; |
| |
| drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1; |
| drive->nice1 = (arg >> IDE_NICE_1) & 1; |
| |
| return 0; |
| } |
| |
| static const struct ide_ioctl_devset ide_ioctl_settings[] = { |
| { HDIO_GET_32BIT, HDIO_SET_32BIT, get_io_32bit, set_io_32bit }, |
| { HDIO_GET_KEEPSETTINGS, HDIO_SET_KEEPSETTINGS, get_ksettings, set_ksettings }, |
| { HDIO_GET_UNMASKINTR, HDIO_SET_UNMASKINTR, get_unmaskirq, set_unmaskirq }, |
| { HDIO_GET_DMA, HDIO_SET_DMA, get_using_dma, set_using_dma }, |
| { -1, HDIO_SET_PIO_MODE, NULL, set_pio_mode }, |
| { 0 } |
| }; |
| |
| int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev, |
| unsigned int cmd, unsigned long arg) |
| { |
| int err; |
| |
| err = ide_setting_ioctl(drive, bdev, cmd, arg, ide_ioctl_settings); |
| if (err != -EOPNOTSUPP) |
| return err; |
| |
| switch (cmd) { |
| case HDIO_OBSOLETE_IDENTITY: |
| case HDIO_GET_IDENTITY: |
| if (bdev != bdev->bd_contains) |
| return -EINVAL; |
| return ide_get_identity_ioctl(drive, cmd, arg); |
| case HDIO_GET_NICE: |
| return ide_get_nice_ioctl(drive, arg); |
| #ifdef CONFIG_IDE_TASK_IOCTL |
| case HDIO_DRIVE_TASKFILE: |
| if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) |
| return -EACCES; |
| switch(drive->media) { |
| case ide_disk: |
| return ide_taskfile_ioctl(drive, cmd, arg); |
| default: |
| return -ENOMSG; |
| } |
| #endif /* CONFIG_IDE_TASK_IOCTL */ |
| |
| case HDIO_DRIVE_CMD: |
| if (!capable(CAP_SYS_RAWIO)) |
| return -EACCES; |
| return ide_cmd_ioctl(drive, cmd, arg); |
| |
| case HDIO_DRIVE_TASK: |
| if (!capable(CAP_SYS_RAWIO)) |
| return -EACCES; |
| return ide_task_ioctl(drive, cmd, arg); |
| case HDIO_SET_NICE: |
| if (!capable(CAP_SYS_ADMIN)) |
| return -EACCES; |
| return ide_set_nice_ioctl(drive, arg); |
| case HDIO_DRIVE_RESET: |
| if (!capable(CAP_SYS_ADMIN)) |
| return -EACCES; |
| |
| return generic_drive_reset(drive); |
| |
| case HDIO_GET_BUSSTATE: |
| if (!capable(CAP_SYS_ADMIN)) |
| return -EACCES; |
| if (put_user(BUSSTATE_ON, (long __user *)arg)) |
| return -EFAULT; |
| return 0; |
| |
| case HDIO_SET_BUSSTATE: |
| if (!capable(CAP_SYS_ADMIN)) |
| return -EACCES; |
| return -EOPNOTSUPP; |
| default: |
| return -EINVAL; |
| } |
| } |
| EXPORT_SYMBOL(generic_ide_ioctl); |
| |
| int ide_setting_ioctl(ide_drive_t *drive, struct block_device *bdev, |
| unsigned int cmd, unsigned long arg, |
| const struct ide_ioctl_devset *s) |
| { |
| unsigned long flags; |
| int err = -EOPNOTSUPP; |
| |
| for (; s->get_ioctl; s++) { |
| if (s->get && s->get_ioctl == cmd) |
| goto read_val; |
| else if (s->set && s->set_ioctl == cmd) |
| goto set_val; |
| } |
| |
| return err; |
| |
| read_val: |
| mutex_lock(&ide_setting_mtx); |
| spin_lock_irqsave(&ide_lock, flags); |
| err = s->get(drive); |
| spin_unlock_irqrestore(&ide_lock, flags); |
| mutex_unlock(&ide_setting_mtx); |
| return err >= 0 ? put_user(err, (long __user *)arg) : err; |
| |
| set_val: |
| if (bdev != bdev->bd_contains) |
| err = -EINVAL; |
| else { |
| if (!capable(CAP_SYS_ADMIN)) |
| err = -EACCES; |
| else { |
| mutex_lock(&ide_setting_mtx); |
| err = s->set(drive, arg); |
| mutex_unlock(&ide_setting_mtx); |
| } |
| } |
| return err; |
| } |
| EXPORT_SYMBOL_GPL(ide_setting_ioctl); |
| |
| /** |
| * ide_device_get - get an additional reference to a ide_drive_t |
| * @drive: device to get a reference to |
| * |
| * Gets a reference to the ide_drive_t and increments the use count of the |
| * underlying LLDD module. |
| */ |
| int ide_device_get(ide_drive_t *drive) |
| { |
| struct device *host_dev; |
| struct module *module; |
| |
| if (!get_device(&drive->gendev)) |
| return -ENXIO; |
| |
| host_dev = drive->hwif->host->dev[0]; |
| module = host_dev ? host_dev->driver->owner : NULL; |
| |
| if (module && !try_module_get(module)) { |
| put_device(&drive->gendev); |
| return -ENXIO; |
| } |
| |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(ide_device_get); |
| |
| /** |
| * ide_device_put - release a reference to a ide_drive_t |
| * @drive: device to release a reference on |
| * |
| * Release a reference to the ide_drive_t and decrements the use count of |
| * the underlying LLDD module. |
| */ |
| void ide_device_put(ide_drive_t *drive) |
| { |
| #ifdef CONFIG_MODULE_UNLOAD |
| struct device *host_dev = drive->hwif->host->dev[0]; |
| struct module *module = host_dev ? host_dev->driver->owner : NULL; |
| |
| if (module) |
| module_put(module); |
| #endif |
| put_device(&drive->gendev); |
| } |
| EXPORT_SYMBOL_GPL(ide_device_put); |
| |
| static int ide_bus_match(struct device *dev, struct device_driver *drv) |
| { |
| return 1; |
| } |
| |
| static char *media_string(ide_drive_t *drive) |
| { |
| switch (drive->media) { |
| case ide_disk: |
| return "disk"; |
| case ide_cdrom: |
| return "cdrom"; |
| case ide_tape: |
| return "tape"; |
| case ide_floppy: |
| return "floppy"; |
| case ide_optical: |
| return "optical"; |
| default: |
| return "UNKNOWN"; |
| } |
| } |
| |
| static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf) |
| { |
| ide_drive_t *drive = to_ide_device(dev); |
| return sprintf(buf, "%s\n", media_string(drive)); |
| } |
| |
| static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf) |
| { |
| ide_drive_t *drive = to_ide_device(dev); |
| return sprintf(buf, "%s\n", drive->name); |
| } |
| |
| static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf) |
| { |
| ide_drive_t *drive = to_ide_device(dev); |
| return sprintf(buf, "ide:m-%s\n", media_string(drive)); |
| } |
| |
| static ssize_t model_show(struct device *dev, struct device_attribute *attr, |
| char *buf) |
| { |
| ide_drive_t *drive = to_ide_device(dev); |
| return sprintf(buf, "%s\n", (char *)&drive->id[ATA_ID_PROD]); |
| } |
| |
| static ssize_t firmware_show(struct device *dev, struct device_attribute *attr, |
| char *buf) |
| { |
| ide_drive_t *drive = to_ide_device(dev); |
| return sprintf(buf, "%s\n", (char *)&drive->id[ATA_ID_FW_REV]); |
| } |
| |
| static ssize_t serial_show(struct device *dev, struct device_attribute *attr, |
| char *buf) |
| { |
| ide_drive_t *drive = to_ide_device(dev); |
| return sprintf(buf, "%s\n", (char *)&drive->id[ATA_ID_SERNO]); |
| } |
| |
| static struct device_attribute ide_dev_attrs[] = { |
| __ATTR_RO(media), |
| __ATTR_RO(drivename), |
| __ATTR_RO(modalias), |
| __ATTR_RO(model), |
| __ATTR_RO(firmware), |
| __ATTR(serial, 0400, serial_show, NULL), |
| __ATTR_NULL |
| }; |
| |
| static int ide_uevent(struct device *dev, struct kobj_uevent_env *env) |
| { |
| ide_drive_t *drive = to_ide_device(dev); |
| |
| add_uevent_var(env, "MEDIA=%s", media_string(drive)); |
| add_uevent_var(env, "DRIVENAME=%s", drive->name); |
| add_uevent_var(env, "MODALIAS=ide:m-%s", media_string(drive)); |
| return 0; |
| } |
| |
| static int generic_ide_probe(struct device *dev) |
| { |
| ide_drive_t *drive = to_ide_device(dev); |
| ide_driver_t *drv = to_ide_driver(dev->driver); |
| |
| return drv->probe ? drv->probe(drive) : -ENODEV; |
| } |
| |
| static int generic_ide_remove(struct device *dev) |
| { |
| ide_drive_t *drive = to_ide_device(dev); |
| ide_driver_t *drv = to_ide_driver(dev->driver); |
| |
| if (drv->remove) |
| drv->remove(drive); |
| |
| return 0; |
| } |
| |
| static void generic_ide_shutdown(struct device *dev) |
| { |
| ide_drive_t *drive = to_ide_device(dev); |
| ide_driver_t *drv = to_ide_driver(dev->driver); |
| |
| if (dev->driver && drv->shutdown) |
| drv->shutdown(drive); |
| } |
| |
| struct bus_type ide_bus_type = { |
| .name = "ide", |
| .match = ide_bus_match, |
| .uevent = ide_uevent, |
| .probe = generic_ide_probe, |
| .remove = generic_ide_remove, |
| .shutdown = generic_ide_shutdown, |
| .dev_attrs = ide_dev_attrs, |
| .suspend = generic_ide_suspend, |
| .resume = generic_ide_resume, |
| }; |
| |
| EXPORT_SYMBOL_GPL(ide_bus_type); |
| |
| int ide_vlb_clk; |
| EXPORT_SYMBOL_GPL(ide_vlb_clk); |
| |
| module_param_named(vlb_clock, ide_vlb_clk, int, 0); |
| MODULE_PARM_DESC(vlb_clock, "VLB clock frequency (in MHz)"); |
| |
| int ide_pci_clk; |
| EXPORT_SYMBOL_GPL(ide_pci_clk); |
| |
| module_param_named(pci_clock, ide_pci_clk, int, 0); |
| MODULE_PARM_DESC(pci_clock, "PCI bus clock frequency (in MHz)"); |
| |
| static int ide_set_dev_param_mask(const char *s, struct kernel_param *kp) |
| { |
| int a, b, i, j = 1; |
| unsigned int *dev_param_mask = (unsigned int *)kp->arg; |
| |
| if (sscanf(s, "%d.%d:%d", &a, &b, &j) != 3 && |
| sscanf(s, "%d.%d", &a, &b) != 2) |
| return -EINVAL; |
| |
| i = a * MAX_DRIVES + b; |
| |
| if (i >= MAX_HWIFS * MAX_DRIVES || j < 0 || j > 1) |
| return -EINVAL; |
| |
| if (j) |
| *dev_param_mask |= (1 << i); |
| else |
| *dev_param_mask &= (1 << i); |
| |
| return 0; |
| } |
| |
| static unsigned int ide_nodma; |
| |
| module_param_call(nodma, ide_set_dev_param_mask, NULL, &ide_nodma, 0); |
| MODULE_PARM_DESC(nodma, "disallow DMA for a device"); |
| |
| static unsigned int ide_noflush; |
| |
| module_param_call(noflush, ide_set_dev_param_mask, NULL, &ide_noflush, 0); |
| MODULE_PARM_DESC(noflush, "disable flush requests for a device"); |
| |
| static unsigned int ide_noprobe; |
| |
| module_param_call(noprobe, ide_set_dev_param_mask, NULL, &ide_noprobe, 0); |
| MODULE_PARM_DESC(noprobe, "skip probing for a device"); |
| |
| static unsigned int ide_nowerr; |
| |
| module_param_call(nowerr, ide_set_dev_param_mask, NULL, &ide_nowerr, 0); |
| MODULE_PARM_DESC(nowerr, "ignore the ATA_DF bit for a device"); |
| |
| static unsigned int ide_cdroms; |
| |
| module_param_call(cdrom, ide_set_dev_param_mask, NULL, &ide_cdroms, 0); |
| MODULE_PARM_DESC(cdrom, "force device as a CD-ROM"); |
| |
| struct chs_geom { |
| unsigned int cyl; |
| u8 head; |
| u8 sect; |
| }; |
| |
| static unsigned int ide_disks; |
| static struct chs_geom ide_disks_chs[MAX_HWIFS * MAX_DRIVES]; |
| |
| static int ide_set_disk_chs(const char *str, struct kernel_param *kp) |
| { |
| int a, b, c = 0, h = 0, s = 0, i, j = 1; |
| |
| if (sscanf(str, "%d.%d:%d,%d,%d", &a, &b, &c, &h, &s) != 5 && |
| sscanf(str, "%d.%d:%d", &a, &b, &j) != 3) |
| return -EINVAL; |
| |
| i = a * MAX_DRIVES + b; |
| |
| if (i >= MAX_HWIFS * MAX_DRIVES || j < 0 || j > 1) |
| return -EINVAL; |
| |
| if (c > INT_MAX || h > 255 || s > 255) |
| return -EINVAL; |
| |
| if (j) |
| ide_disks |= (1 << i); |
| else |
| ide_disks &= (1 << i); |
| |
| ide_disks_chs[i].cyl = c; |
| ide_disks_chs[i].head = h; |
| ide_disks_chs[i].sect = s; |
| |
| return 0; |
| } |
| |
| module_param_call(chs, ide_set_disk_chs, NULL, NULL, 0); |
| MODULE_PARM_DESC(chs, "force device as a disk (using CHS)"); |
| |
| static void ide_dev_apply_params(ide_drive_t *drive) |
| { |
| int i = drive->hwif->index * MAX_DRIVES + drive->select.b.unit; |
| |
| if (ide_nodma & (1 << i)) { |
| printk(KERN_INFO "ide: disallowing DMA for %s\n", drive->name); |
| drive->nodma = 1; |
| } |
| if (ide_noflush & (1 << i)) { |
| printk(KERN_INFO "ide: disabling flush requests for %s\n", |
| drive->name); |
| drive->noflush = 1; |
| } |
| if (ide_noprobe & (1 << i)) { |
| printk(KERN_INFO "ide: skipping probe for %s\n", drive->name); |
| drive->noprobe = 1; |
| } |
| if (ide_nowerr & (1 << i)) { |
| printk(KERN_INFO "ide: ignoring the ATA_DF bit for %s\n", |
| drive->name); |
| drive->bad_wstat = BAD_R_STAT; |
| } |
| if (ide_cdroms & (1 << i)) { |
| printk(KERN_INFO "ide: forcing %s as a CD-ROM\n", drive->name); |
| drive->present = 1; |
| drive->media = ide_cdrom; |
| /* an ATAPI device ignores DRDY */ |
| drive->ready_stat = 0; |
| } |
| if (ide_disks & (1 << i)) { |
| drive->cyl = drive->bios_cyl = ide_disks_chs[i].cyl; |
| drive->head = drive->bios_head = ide_disks_chs[i].head; |
| drive->sect = drive->bios_sect = ide_disks_chs[i].sect; |
| drive->forced_geom = 1; |
| printk(KERN_INFO "ide: forcing %s as a disk (%d/%d/%d)\n", |
| drive->name, |
| drive->cyl, drive->head, drive->sect); |
| drive->present = 1; |
| drive->media = ide_disk; |
| drive->ready_stat = ATA_DRDY; |
| } |
| } |
| |
| static unsigned int ide_ignore_cable; |
| |
| static int ide_set_ignore_cable(const char *s, struct kernel_param *kp) |
| { |
| int i, j = 1; |
| |
| if (sscanf(s, "%d:%d", &i, &j) != 2 && sscanf(s, "%d", &i) != 1) |
| return -EINVAL; |
| |
| if (i >= MAX_HWIFS || j < 0 || j > 1) |
| return -EINVAL; |
| |
| if (j) |
| ide_ignore_cable |= (1 << i); |
| else |
| ide_ignore_cable &= (1 << i); |
| |
| return 0; |
| } |
| |
| module_param_call(ignore_cable, ide_set_ignore_cable, NULL, NULL, 0); |
| MODULE_PARM_DESC(ignore_cable, "ignore cable detection"); |
| |
| void ide_port_apply_params(ide_hwif_t *hwif) |
| { |
| int i; |
| |
| if (ide_ignore_cable & (1 << hwif->index)) { |
| printk(KERN_INFO "ide: ignoring cable detection for %s\n", |
| hwif->name); |
| hwif->cbl = ATA_CBL_PATA40_SHORT; |
| } |
| |
| for (i = 0; i < MAX_DRIVES; i++) |
| ide_dev_apply_params(&hwif->drives[i]); |
| } |
| |
| /* |
| * This is gets invoked once during initialization, to set *everything* up |
| */ |
| static int __init ide_init(void) |
| { |
| int ret; |
| |
| printk(KERN_INFO "Uniform Multi-Platform E-IDE driver\n"); |
| |
| ret = bus_register(&ide_bus_type); |
| if (ret < 0) { |
| printk(KERN_WARNING "IDE: bus_register error: %d\n", ret); |
| return ret; |
| } |
| |
| ide_port_class = class_create(THIS_MODULE, "ide_port"); |
| if (IS_ERR(ide_port_class)) { |
| ret = PTR_ERR(ide_port_class); |
| goto out_port_class; |
| } |
| |
| proc_ide_create(); |
| |
| return 0; |
| |
| out_port_class: |
| bus_unregister(&ide_bus_type); |
| |
| return ret; |
| } |
| |
| static void __exit ide_exit(void) |
| { |
| proc_ide_destroy(); |
| |
| class_destroy(ide_port_class); |
| |
| bus_unregister(&ide_bus_type); |
| } |
| |
| module_init(ide_init); |
| module_exit(ide_exit); |
| |
| MODULE_LICENSE("GPL"); |