* basic function of the tape device driver
*
* S390 and zSeries version
- * Copyright IBM Corp. 2001,2006
+ * Copyright IBM Corp. 2001, 2009
* Author(s): Carsten Otte <cotte@de.ibm.com>
* Michael Holzheu <holzheu@de.ibm.com>
* Tuan Ngo-Anh <ngoanh@de.ibm.com>
{
struct tape_device *tdev;
- tdev = (struct tape_device *) dev->driver_data;
+ tdev = dev_get_drvdata(dev);
return scnprintf(buf, PAGE_SIZE, "%i\n", tdev->medium_state);
}
{
struct tape_device *tdev;
- tdev = (struct tape_device *) dev->driver_data;
+ tdev = dev_get_drvdata(dev);
return scnprintf(buf, PAGE_SIZE, "%i\n", tdev->first_minor);
}
{
struct tape_device *tdev;
- tdev = (struct tape_device *) dev->driver_data;
+ tdev = dev_get_drvdata(dev);
return scnprintf(buf, PAGE_SIZE, "%s\n", (tdev->first_minor < 0) ?
"OFFLINE" : tape_state_verbose[tdev->tape_state]);
}
struct tape_device *tdev;
ssize_t rc;
- tdev = (struct tape_device *) dev->driver_data;
+ tdev = dev_get_drvdata(dev);
if (tdev->first_minor < 0)
return scnprintf(buf, PAGE_SIZE, "N/A\n");
{
struct tape_device *tdev;
- tdev = (struct tape_device *) dev->driver_data;
+ tdev = dev_get_drvdata(dev);
return scnprintf(buf, PAGE_SIZE, "%i\n", tdev->char_data.block_size);
}
switch(newstate){
case MS_UNLOADED:
device->tape_generic_status |= GMT_DR_OPEN(~0);
- dev_info(&device->cdev->dev, "The tape cartridge has been "
- "successfully unloaded\n");
+ if (device->medium_state == MS_LOADED)
+ pr_info("%s: The tape cartridge has been successfully "
+ "unloaded\n", dev_name(&device->cdev->dev));
break;
case MS_LOADED:
device->tape_generic_status &= ~GMT_DR_OPEN(~0);
- dev_info(&device->cdev->dev, "A tape cartridge has been "
- "mounted\n");
+ if (device->medium_state == MS_UNLOADED)
+ pr_info("%s: A tape cartridge has been mounted\n",
+ dev_name(&device->cdev->dev));
break;
default:
// print nothing
out_char:
tapechar_cleanup_device(device);
+out_minor:
+ tape_remove_minor(device);
out_discipline:
device->discipline->cleanup_device(device);
device->discipline = NULL;
-out_minor:
- tape_remove_minor(device);
out:
module_put(discipline->owner);
return rc;
tape_med_state_set(device, MS_UNKNOWN);
}
+/*
+ * Suspend device.
+ *
+ * Called by the common I/O layer if the drive should be suspended on user
+ * request. We refuse to suspend if the device is loaded or in use for the
+ * following reason:
+ * While the Linux guest is suspended, it might be logged off which causes
+ * devices to be detached. Tape devices are automatically rewound and unloaded
+ * during DETACH processing (unless the tape device was attached with the
+ * NOASSIGN or MULTIUSER option). After rewind/unload, there is no way to
+ * resume the original state of the tape device, since we would need to
+ * manually re-load the cartridge which was active at suspend time.
+ */
+int tape_generic_pm_suspend(struct ccw_device *cdev)
+{
+ struct tape_device *device;
+
+ device = dev_get_drvdata(&cdev->dev);
+ if (!device) {
+ return -ENODEV;
+ }
+
+ DBF_LH(3, "(%08x): tape_generic_pm_suspend(%p)\n",
+ device->cdev_id, device);
+
+ if (device->medium_state != MS_UNLOADED) {
+ pr_err("A cartridge is loaded in tape device %s, "
+ "refusing to suspend\n", dev_name(&cdev->dev));
+ return -EBUSY;
+ }
+
+ spin_lock_irq(get_ccwdev_lock(device->cdev));
+ switch (device->tape_state) {
+ case TS_INIT:
+ case TS_NOT_OPER:
+ case TS_UNUSED:
+ spin_unlock_irq(get_ccwdev_lock(device->cdev));
+ break;
+ default:
+ pr_err("Tape device %s is busy, refusing to "
+ "suspend\n", dev_name(&cdev->dev));
+ spin_unlock_irq(get_ccwdev_lock(device->cdev));
+ return -EBUSY;
+ }
+
+ DBF_LH(3, "(%08x): Drive suspended.\n", device->cdev_id);
+ return 0;
+}
+
/*
* Set device offline.
*
{
struct tape_device *device;
- device = cdev->dev.driver_data;
+ device = dev_get_drvdata(&cdev->dev);
if (!device) {
return -ENODEV;
}
tape_put_device(device);
return ret;
}
- cdev->dev.driver_data = device;
+ dev_set_drvdata(&cdev->dev, device);
cdev->handler = __tape_do_irq;
device->cdev = cdev;
ccw_device_get_id(cdev, &dev_id);
{
struct tape_device * device;
- device = cdev->dev.driver_data;
+ device = dev_get_drvdata(&cdev->dev);
if (!device) {
return;
}
*/
DBF_EVENT(3, "(%08x): Drive in use vanished!\n",
device->cdev_id);
- dev_warn(&device->cdev->dev, "A tape unit was detached"
- " while in use\n");
+ pr_warning("%s: A tape unit was detached while in "
+ "use\n", dev_name(&device->cdev->dev));
tape_state_set(device, TS_NOT_OPER);
__tape_discard_requests(device);
spin_unlock_irq(get_ccwdev_lock(device->cdev));
tape_cleanup_device(device);
}
- if (cdev->dev.driver_data != NULL) {
+ if (!dev_get_drvdata(&cdev->dev)) {
sysfs_remove_group(&cdev->dev.kobj, &tape_attr_group);
- cdev->dev.driver_data = tape_put_device(cdev->dev.driver_data);
+ dev_set_drvdata(&cdev->dev, tape_put_device(dev_get_drvdata(&cdev->dev)));
}
}
struct tape_request *request;
int rc;
- device = (struct tape_device *) cdev->dev.driver_data;
+ device = dev_get_drvdata(&cdev->dev);
if (device == NULL) {
return;
}
EXPORT_SYMBOL(tape_generic_probe);
EXPORT_SYMBOL(tape_generic_online);
EXPORT_SYMBOL(tape_generic_offline);
+EXPORT_SYMBOL(tape_generic_pm_suspend);
EXPORT_SYMBOL(tape_put_device);
EXPORT_SYMBOL(tape_get_device_reference);
EXPORT_SYMBOL(tape_state_verbose);
git.openpandora.org / pandora-kernel.git / blobdiff