/**
* zfcp_adapter_dequeue - remove the adapter from the resource list
* @adapter: pointer to struct zfcp_adapter which should be removed
* locks: adapter list write lock is assumed to be held by caller
*/
void zfcp_adapter_dequeue(struct zfcp_adapter *adapter)
{
int retval = 0;
unsigned long flags;
cancel_work_sync(&adapter->scan_work);
cancel_work_sync(&adapter->stat_work);
zfcp_adapter_scsi_unregister(adapter);
sysfs_remove_group(&adapter->ccw_device->dev.kobj,
&zfcp_sysfs_adapter_attrs);
dev_set_drvdata(&adapter->ccw_device->dev, NULL);
/* sanity check: no pending FSF requests */
spin_lock_irqsave(&adapter->req_list_lock, flags);
retval = zfcp_reqlist_isempty(adapter);
spin_unlock_irqrestore(&adapter->req_list_lock, flags);
if (!retval)
return;
zfcp_adapter_debug_unregister(adapter);
zfcp_qdio_free(adapter);
zfcp_free_low_mem_buffers(adapter);
kfree(adapter->req_list);
kfree(adapter->fc_stats);
kfree(adapter->stats_reset_data);
kfree(adapter);
}
/**
* zfcp_adapter_debug_register - registers debug feature for an adapter
* @adapter: pointer to adapter for which debug features should be registered
* return: -ENOMEM on error, 0 otherwise
*/
int zfcp_adapter_debug_register(struct zfcp_adapter *adapter)
{
char dbf_name[DEBUG_MAX_NAME_LEN];
/* debug feature area which records recovery activity */
sprintf(dbf_name, "zfcp_%s_rec", dev_name(&adapter->ccw_device->dev));
adapter->rec_dbf = debug_register(dbf_name, dbfsize, 1,
sizeof(struct zfcp_rec_dbf_record));
if (!adapter->rec_dbf)
goto failed;
debug_register_view(adapter->rec_dbf, &debug_hex_ascii_view);
debug_register_view(adapter->rec_dbf, &zfcp_rec_dbf_view);
debug_set_level(adapter->rec_dbf, 3);
/* debug feature area which records HBA (FSF and QDIO) conditions */
sprintf(dbf_name, "zfcp_%s_hba", dev_name(&adapter->ccw_device->dev));
adapter->hba_dbf = debug_register(dbf_name, dbfsize, 1,
sizeof(struct zfcp_hba_dbf_record));
if (!adapter->hba_dbf)
goto failed;
debug_register_view(adapter->hba_dbf, &debug_hex_ascii_view);
debug_register_view(adapter->hba_dbf, &zfcp_hba_dbf_view);
debug_set_level(adapter->hba_dbf, 3);
/* debug feature area which records SAN command failures and recovery */
sprintf(dbf_name, "zfcp_%s_san", dev_name(&adapter->ccw_device->dev));
adapter->san_dbf = debug_register(dbf_name, dbfsize, 1,
sizeof(struct zfcp_san_dbf_record));
if (!adapter->san_dbf)
goto failed;
debug_register_view(adapter->san_dbf, &debug_hex_ascii_view);
debug_register_view(adapter->san_dbf, &zfcp_san_dbf_view);
debug_set_level(adapter->san_dbf, 6);
/* debug feature area which records SCSI command failures and recovery */
sprintf(dbf_name, "zfcp_%s_scsi", dev_name(&adapter->ccw_device->dev));
adapter->scsi_dbf = debug_register(dbf_name, dbfsize, 1,
sizeof(struct zfcp_scsi_dbf_record));
if (!adapter->scsi_dbf)
goto failed;
debug_register_view(adapter->scsi_dbf, &debug_hex_ascii_view);
debug_register_view(adapter->scsi_dbf, &zfcp_scsi_dbf_view);
debug_set_level(adapter->scsi_dbf, 3);
return 0;
failed:
zfcp_adapter_debug_unregister(adapter);
return -ENOMEM;
}
/**
* zfcp_adapter_dequeue - remove the adapter from the resource list
* @adapter: pointer to struct zfcp_adapter which should be removed
* locks: adapter list write lock is assumed to be held by caller
*/
void zfcp_adapter_dequeue(struct zfcp_adapter *adapter)
{
int retval = 0;
unsigned long flags;
cancel_work_sync(&adapter->scan_work);
cancel_work_sync(&adapter->stat_work);
zfcp_adapter_scsi_unregister(adapter);
device_unregister(&adapter->generic_services);
sysfs_remove_group(&adapter->ccw_device->dev.kobj,
&zfcp_sysfs_adapter_attrs);
dev_set_drvdata(&adapter->ccw_device->dev, NULL);
/* sanity check: no pending FSF requests */
spin_lock_irqsave(&adapter->req_list_lock, flags);
retval = zfcp_reqlist_isempty(adapter);
spin_unlock_irqrestore(&adapter->req_list_lock, flags);
if (!retval)
return;
zfcp_adapter_debug_unregister(adapter);
/* remove specified adapter data structure from list */
write_lock_irq(&zfcp_data.config_lock);
list_del(&adapter->list);
write_unlock_irq(&zfcp_data.config_lock);
/* decrease number of adapters in list */
zfcp_data.adapters--;
zfcp_qdio_free(adapter);
zfcp_free_low_mem_buffers(adapter);
kfree(adapter->req_list);
kfree(adapter->fc_stats);
kfree(adapter->stats_reset_data);
kfree(adapter);
}
/**
* zfcp_adapter_enqueue - enqueue a new adapter to the list
* @ccw_device: pointer to the struct cc_device
*
* Returns: 0 if a new adapter was successfully enqueued
* -ENOMEM if alloc failed
* Enqueues an adapter at the end of the adapter list in the driver data.
* All adapter internal structures are set up.
* Proc-fs entries are also created.
* locks: config_sema must be held to serialise changes to the adapter list
*/
int zfcp_adapter_enqueue(struct ccw_device *ccw_device)
{
struct zfcp_adapter *adapter;
/*
* Note: It is safe to release the list_lock, as any list changes
* are protected by the config_sema, which must be held to get here
*/
adapter = kzalloc(sizeof(struct zfcp_adapter), GFP_KERNEL);
if (!adapter)
return -ENOMEM;
ccw_device->handler = NULL;
adapter->ccw_device = ccw_device;
atomic_set(&adapter->refcount, 0);
if (zfcp_qdio_allocate(adapter))
goto qdio_allocate_failed;
if (zfcp_allocate_low_mem_buffers(adapter))
goto failed_low_mem_buffers;
if (zfcp_reqlist_alloc(adapter))
goto failed_low_mem_buffers;
if (zfcp_adapter_debug_register(adapter))
goto debug_register_failed;
init_waitqueue_head(&adapter->remove_wq);
init_waitqueue_head(&adapter->erp_thread_wqh);
init_waitqueue_head(&adapter->erp_done_wqh);
INIT_LIST_HEAD(&adapter->port_list_head);
INIT_LIST_HEAD(&adapter->erp_ready_head);
INIT_LIST_HEAD(&adapter->erp_running_head);
spin_lock_init(&adapter->req_list_lock);
spin_lock_init(&adapter->hba_dbf_lock);
spin_lock_init(&adapter->san_dbf_lock);
spin_lock_init(&adapter->scsi_dbf_lock);
spin_lock_init(&adapter->rec_dbf_lock);
spin_lock_init(&adapter->req_q_lock);
rwlock_init(&adapter->erp_lock);
rwlock_init(&adapter->abort_lock);
sema_init(&adapter->erp_ready_sem, 0);
INIT_WORK(&adapter->stat_work, _zfcp_status_read_scheduler);
INIT_WORK(&adapter->scan_work, _zfcp_scan_ports_later);
adapter->service_level.seq_print = zfcp_print_sl;
/* mark adapter unusable as long as sysfs registration is not complete */
atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status);
dev_set_drvdata(&ccw_device->dev, adapter);
if (sysfs_create_group(&ccw_device->dev.kobj,
&zfcp_sysfs_adapter_attrs))
goto sysfs_failed;
atomic_clear_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status);
zfcp_fc_nameserver_init(adapter);
if (!zfcp_adapter_scsi_register(adapter))
return 0;
sysfs_failed:
zfcp_adapter_debug_unregister(adapter);
debug_register_failed:
dev_set_drvdata(&ccw_device->dev, NULL);
kfree(adapter->req_list);
failed_low_mem_buffers:
zfcp_free_low_mem_buffers(adapter);
qdio_allocate_failed:
zfcp_qdio_free(adapter);
kfree(adapter);
return -ENOMEM;
}
