/******************************************************************************
* module init/exit *
*****************************************************************************/
static int __init mon_init(void)
{
int rc;
if (!MACHINE_IS_VM) {
P_ERROR("not running under z/VM, driver not loaded\n");
return -ENODEV;
}
/*
* Register with IUCV and connect to *MONITOR service
*/
rc = iucv_register(&monreader_iucv_handler, 1);
if (rc) {
P_ERROR("failed to register with iucv driver\n");
return rc;
}
P_INFO("open, registered with IUCV\n");
rc = segment_type(mon_dcss_name);
if (rc < 0) {
segment_warning(rc, mon_dcss_name);
goto out_iucv;
}
if (rc != SEG_TYPE_SC) {
P_ERROR("segment %s has unsupported type, should be SC\n",
mon_dcss_name);
rc = -EINVAL;
goto out_iucv;
}
rc = segment_load(mon_dcss_name, SEGMENT_SHARED,
&mon_dcss_start, &mon_dcss_end);
if (rc < 0) {
segment_warning(rc, mon_dcss_name);
rc = -EINVAL;
goto out_iucv;
}
dcss_mkname(mon_dcss_name, &user_data_connect[8]);
rc = misc_register(&mon_dev);
if (rc < 0 ) {
P_ERROR("misc_register failed, rc = %i\n", rc);
goto out;
}
P_INFO("Loaded segment %s from %p to %p, size = %lu Byte\n",
mon_dcss_name, (void *) mon_dcss_start, (void *) mon_dcss_end,
mon_dcss_end - mon_dcss_start + 1);
return 0;
out:
segment_unload(mon_dcss_name);
out_iucv:
iucv_unregister(&monreader_iucv_handler, 1);
return rc;
}
static int monreader_restore(struct device *dev)
{
int rc;
segment_unload(mon_dcss_name);
rc = segment_load(mon_dcss_name, SEGMENT_SHARED,
&mon_dcss_start, &mon_dcss_end);
if (rc < 0) {
segment_warning(rc, mon_dcss_name);
panic("fatal monreader resume error: no monitor dcss\n");
}
return monreader_thaw(dev);
}
/******************************************************************************
* module init/exit *
*****************************************************************************/
static int __init mon_init(void)
{
int rc;
if (!MACHINE_IS_VM) {
pr_err("The z/VM *MONITOR record device driver cannot be "
"loaded without z/VM\n");
return -ENODEV;
}
/*
* Register with IUCV and connect to *MONITOR service
*/
rc = iucv_register(&monreader_iucv_handler, 1);
if (rc) {
pr_err("The z/VM *MONITOR record device driver failed to "
"register with IUCV\n");
return rc;
}
rc = driver_register(&monreader_driver);
if (rc)
goto out_iucv;
monreader_device = kzalloc(sizeof(struct device), GFP_KERNEL);
if (!monreader_device)
goto out_driver;
dev_set_name(monreader_device, "monreader-dev");
monreader_device->bus = &iucv_bus;
monreader_device->parent = iucv_root;
monreader_device->driver = &monreader_driver;
monreader_device->release = (void (*)(struct device *))kfree;
rc = device_register(monreader_device);
if (rc) {
put_device(monreader_device);
goto out_driver;
}
rc = segment_type(mon_dcss_name);
if (rc < 0) {
segment_warning(rc, mon_dcss_name);
goto out_device;
}
if (rc != SEG_TYPE_SC) {
pr_err("The specified *MONITOR DCSS %s does not have the "
"required type SC\n", mon_dcss_name);
rc = -EINVAL;
goto out_device;
}
rc = segment_load(mon_dcss_name, SEGMENT_SHARED,
&mon_dcss_start, &mon_dcss_end);
if (rc < 0) {
segment_warning(rc, mon_dcss_name);
rc = -EINVAL;
goto out_device;
}
dcss_mkname(mon_dcss_name, &user_data_connect[8]);
/*
* misc_register() has to be the last action in module_init(), because
* file operations will be available right after this.
*/
rc = misc_register(&mon_dev);
if (rc < 0 )
goto out;
return 0;
out:
segment_unload(mon_dcss_name);
out_device:
device_unregister(monreader_device);
out_driver:
driver_unregister(&monreader_driver);
out_iucv:
iucv_unregister(&monreader_iucv_handler, 1);
return rc;
}
