static void dasd_device_tasklet(unsigned long);
static void dasd_block_tasklet(unsigned long);
static void do_kick_device(struct work_struct *);
-static void do_restore_device(struct work_struct *);
static void do_reload_device(struct work_struct *);
static void do_requeue_requests(struct work_struct *);
static void dasd_return_cqr_cb(struct dasd_ccw_req *, void *);
INIT_LIST_HEAD(&device->ccw_queue);
timer_setup(&device->timer, dasd_device_timeout, 0);
INIT_WORK(&device->kick_work, do_kick_device);
- INIT_WORK(&device->restore_device, do_restore_device);
INIT_WORK(&device->reload_device, do_reload_device);
INIT_WORK(&device->requeue_requests, do_requeue_requests);
device->state = DASD_STATE_NEW;
}
EXPORT_SYMBOL(dasd_reload_device);
-/*
- * dasd_restore_device will schedule a call do do_restore_device to the kernel
- * event daemon.
- */
-static void do_restore_device(struct work_struct *work)
-{
- struct dasd_device *device = container_of(work, struct dasd_device,
- restore_device);
- device->cdev->drv->restore(device->cdev);
- dasd_put_device(device);
-}
-
-void dasd_restore_device(struct dasd_device *device)
-{
- dasd_get_device(device);
- /* queue call to dasd_restore_device to the kernel event daemon. */
- if (!schedule_work(&device->restore_device))
- dasd_put_device(device);
-}
-
/*
* Set the target state for a device and starts the state change.
*/
"start_IO: -EIO device gone, retry");
break;
case -EINVAL:
- /* most likely caused in power management context */
DBF_DEV_EVENT(DBF_WARNING, device, "%s",
"start_IO: -EINVAL device currently "
"not accessible");
static int __dasd_device_is_unusable(struct dasd_device *device,
struct dasd_ccw_req *cqr)
{
- int mask = ~(DASD_STOPPED_DC_WAIT | DASD_UNRESUMED_PM | DASD_STOPPED_NOSPC);
+ int mask = ~(DASD_STOPPED_DC_WAIT | DASD_STOPPED_NOSPC);
if (test_bit(DASD_FLAG_OFFLINE, &device->flags) &&
!test_bit(DASD_FLAG_SAFE_OFFLINE_RUNNING, &device->flags)) {
if (!dasd_path_get_tbvpm(device))
return;
- if (device->stopped &
- ~(DASD_STOPPED_DC_WAIT | DASD_UNRESUMED_PM))
+ if (device->stopped & ~(DASD_STOPPED_DC_WAIT))
return;
rc = device->discipline->verify_path(device,
dasd_path_get_tbvpm(device));
"operational\n");
DBF_DEV_EVENT(DBF_WARNING, device, "%s", "path operational");
dasd_device_remove_stop_bits(device, DASD_STOPPED_DC_WAIT);
- if (device->stopped & DASD_UNRESUMED_PM) {
- dasd_device_remove_stop_bits(device, DASD_UNRESUMED_PM);
- dasd_restore_device(device);
- return 1;
- }
dasd_schedule_device_bh(device);
if (device->block) {
dasd_schedule_block_bh(device->block);
}
EXPORT_SYMBOL(dasd_schedule_requeue);
-int dasd_generic_pm_freeze(struct ccw_device *cdev)
-{
- struct dasd_device *device = dasd_device_from_cdev(cdev);
-
- if (IS_ERR(device))
- return PTR_ERR(device);
-
- /* mark device as suspended */
- set_bit(DASD_FLAG_SUSPENDED, &device->flags);
-
- if (device->discipline->freeze)
- device->discipline->freeze(device);
-
- /* disallow new I/O */
- dasd_device_set_stop_bits(device, DASD_STOPPED_PM);
-
- return dasd_generic_requeue_all_requests(device);
-}
-EXPORT_SYMBOL_GPL(dasd_generic_pm_freeze);
-
-int dasd_generic_restore_device(struct ccw_device *cdev)
-{
- struct dasd_device *device = dasd_device_from_cdev(cdev);
- int rc = 0;
-
- if (IS_ERR(device))
- return PTR_ERR(device);
-
- /* allow new IO again */
- dasd_device_remove_stop_bits(device,
- (DASD_STOPPED_PM | DASD_UNRESUMED_PM));
-
- dasd_schedule_device_bh(device);
-
- /*
- * call discipline restore function
- * if device is stopped do nothing e.g. for disconnected devices
- */
- if (device->discipline->restore && !(device->stopped))
- rc = device->discipline->restore(device);
- if (rc || device->stopped)
- /*
- * if the resume failed for the DASD we put it in
- * an UNRESUMED stop state
- */
- device->stopped |= DASD_UNRESUMED_PM;
-
- if (device->block) {
- dasd_schedule_block_bh(device->block);
- if (device->block->request_queue)
- blk_mq_run_hw_queues(device->block->request_queue,
- true);
- }
-
- clear_bit(DASD_FLAG_SUSPENDED, &device->flags);
- dasd_put_device(device);
- return 0;
-}
-EXPORT_SYMBOL_GPL(dasd_generic_restore_device);
-
static struct dasd_ccw_req *dasd_generic_build_rdc(struct dasd_device *device,
int rdc_buffer_size,
int magic)
}
}
-static int dasd_eckd_pm_freeze(struct dasd_device *device)
-{
- /*
- * the device should be disconnected from our LCU structure
- * on restore we will reconnect it and reread LCU specific
- * information like PAV support that might have changed
- */
- dasd_alias_remove_device(device);
- dasd_alias_disconnect_device_from_lcu(device);
-
- return 0;
-}
-
-static int dasd_eckd_restore_device(struct dasd_device *device)
-{
- struct dasd_eckd_private *private = device->private;
- struct dasd_eckd_characteristics temp_rdc_data;
- int rc;
- struct dasd_uid temp_uid;
- unsigned long flags;
- unsigned long cqr_flags = 0;
-
- /* Read Configuration Data */
- rc = dasd_eckd_read_conf(device);
- if (rc) {
- DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
- "Read configuration data failed, rc=%d", rc);
- goto out_err;
- }
-
- dasd_eckd_get_uid(device, &temp_uid);
- /* Generate device unique id */
- rc = dasd_eckd_generate_uid(device);
- spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
- if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0)
- dev_err(&device->cdev->dev, "The UID of the DASD has "
- "changed\n");
- spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
- if (rc)
- goto out_err;
-
- /* register lcu with alias handling, enable PAV if this is a new lcu */
- rc = dasd_alias_make_device_known_to_lcu(device);
- if (rc)
- goto out_err;
-
- set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr_flags);
- dasd_eckd_validate_server(device, cqr_flags);
-
- /* RE-Read Configuration Data */
- rc = dasd_eckd_read_conf(device);
- if (rc) {
- DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
- "Read configuration data failed, rc=%d", rc);
- goto out_err2;
- }
-
- /* Read Feature Codes */
- dasd_eckd_read_features(device);
-
- /* Read Volume Information */
- dasd_eckd_read_vol_info(device);
-
- /* Read Extent Pool Information */
- dasd_eckd_read_ext_pool_info(device);
-
- /* Read Device Characteristics */
- rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC,
- &temp_rdc_data, 64);
- if (rc) {
- DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
- "Read device characteristic failed, rc=%d", rc);
- goto out_err2;
- }
- spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
- memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data));
- spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
-
- /* add device to alias management */
- dasd_alias_add_device(device);
-
- return 0;
-
-out_err2:
- dasd_alias_disconnect_device_from_lcu(device);
-out_err:
- return -1;
-}
-
static int dasd_eckd_reload_device(struct dasd_device *device)
{
struct dasd_eckd_private *private = device->private;
.notify = dasd_generic_notify,
.path_event = dasd_generic_path_event,
.shutdown = dasd_generic_shutdown,
- .freeze = dasd_generic_pm_freeze,
- .thaw = dasd_generic_restore_device,
- .restore = dasd_generic_restore_device,
.uc_handler = dasd_generic_uc_handler,
.int_class = IRQIO_DAS,
};
.dump_sense_dbf = dasd_eckd_dump_sense_dbf,
.fill_info = dasd_eckd_fill_info,
.ioctl = dasd_eckd_ioctl,
- .freeze = dasd_eckd_pm_freeze,
- .restore = dasd_eckd_restore_device,
.reload = dasd_eckd_reload_device,
.get_uid = dasd_eckd_get_uid,
.kick_validate = dasd_eckd_kick_validate_server,
.set_online = dasd_fba_set_online,
.notify = dasd_generic_notify,
.path_event = dasd_generic_path_event,
- .freeze = dasd_generic_pm_freeze,
- .thaw = dasd_generic_restore_device,
- .restore = dasd_generic_restore_device,
.int_class = IRQIO_DAS,
};
int (*fill_info) (struct dasd_device *, struct dasd_information2_t *);
int (*ioctl) (struct dasd_block *, unsigned int, void __user *);
- /* suspend/resume functions */
- int (*freeze) (struct dasd_device *);
- int (*restore) (struct dasd_device *);
-
/* reload device after state change */
int (*reload) (struct dasd_device *);
atomic_t tasklet_scheduled;
struct tasklet_struct tasklet;
struct work_struct kick_work;
- struct work_struct restore_device;
struct work_struct reload_device;
struct work_struct kick_validate;
struct work_struct suc_work;
#define DASD_STOPPED_PENDING 4 /* long busy */
#define DASD_STOPPED_DC_WAIT 8 /* disconnected, wait */
#define DASD_STOPPED_SU 16 /* summary unit check handling */
-#define DASD_STOPPED_PM 32 /* pm state transition */
-#define DASD_UNRESUMED_PM 64 /* pm resume failed state */
#define DASD_STOPPED_NOSPC 128 /* no space left */
/* per device flags */
void dasd_enable_device(struct dasd_device *);
void dasd_set_target_state(struct dasd_device *, int);
void dasd_kick_device(struct dasd_device *);
-void dasd_restore_device(struct dasd_device *);
void dasd_reload_device(struct dasd_device *);
void dasd_schedule_requeue(struct dasd_device *);
void dasd_generic_shutdown(struct ccw_device *);
void dasd_generic_handle_state_change(struct dasd_device *);
-int dasd_generic_pm_freeze(struct ccw_device *);
-int dasd_generic_restore_device(struct ccw_device *);
enum uc_todo dasd_generic_uc_handler(struct ccw_device *, struct irb *);
void dasd_generic_path_event(struct ccw_device *, int *);
int dasd_generic_verify_path(struct dasd_device *, __u8);
projects / linux-2.6-microblaze.git / commitdiff