return 0;
}
-enum iucv_pm_states {
- IUCV_PM_INITIAL = 0,
- IUCV_PM_FREEZING = 1,
- IUCV_PM_THAWING = 2,
- IUCV_PM_RESTORING = 3,
-};
-static enum iucv_pm_states iucv_pm_state;
-
-static int iucv_pm_prepare(struct device *);
-static void iucv_pm_complete(struct device *);
-static int iucv_pm_freeze(struct device *);
-static int iucv_pm_thaw(struct device *);
-static int iucv_pm_restore(struct device *);
-
-static const struct dev_pm_ops iucv_pm_ops = {
- .prepare = iucv_pm_prepare,
- .complete = iucv_pm_complete,
- .freeze = iucv_pm_freeze,
- .thaw = iucv_pm_thaw,
- .restore = iucv_pm_restore,
-};
-
struct bus_type iucv_bus = {
.name = "iucv",
.match = iucv_bus_match,
- .pm = &iucv_pm_ops,
};
EXPORT_SYMBOL(iucv_bus);
}
/**
- * iucv_block_cpu_almost
- * @data: unused
- *
- * Allow connection-severed interrupts only on this cpu.
- */
-static void iucv_block_cpu_almost(void *data)
-{
- int cpu = smp_processor_id();
- union iucv_param *parm;
-
- /* Allow iucv control interrupts only */
- parm = iucv_param_irq[cpu];
- memset(parm, 0, sizeof(union iucv_param));
- parm->set_mask.ipmask = 0x08;
- iucv_call_b2f0(IUCV_SETMASK, parm);
- /* Allow iucv-severed interrupt only */
- memset(parm, 0, sizeof(union iucv_param));
- parm->set_mask.ipmask = 0x20;
- iucv_call_b2f0(IUCV_SETCONTROLMASK, parm);
-
- /* Clear indication that iucv interrupts are allowed for this cpu. */
- cpumask_clear_cpu(cpu, &iucv_irq_cpumask);
-}
-
-/**
* iucv_declare_cpu
* @data: unused
*
spin_unlock(&iucv_queue_lock);
}
-static int iucv_pm_prepare(struct device *dev)
-{
- int rc = 0;
-
-#ifdef CONFIG_PM_DEBUG
- printk(KERN_INFO "iucv_pm_prepare\n");
-#endif
- if (dev->driver && dev->driver->pm && dev->driver->pm->prepare)
- rc = dev->driver->pm->prepare(dev);
- return rc;
-}
-
-static void iucv_pm_complete(struct device *dev)
-{
-#ifdef CONFIG_PM_DEBUG
- printk(KERN_INFO "iucv_pm_complete\n");
-#endif
- if (dev->driver && dev->driver->pm && dev->driver->pm->complete)
- dev->driver->pm->complete(dev);
-}
-
-/**
- * iucv_path_table_empty() - determine if iucv path table is empty
- *
- * Returns 0 if there are still iucv pathes defined
- * 1 if there are no iucv pathes defined
- */
-static int iucv_path_table_empty(void)
-{
- int i;
-
- for (i = 0; i < iucv_max_pathid; i++) {
- if (iucv_path_table[i])
- return 0;
- }
- return 1;
-}
-
-/**
- * iucv_pm_freeze() - Freeze PM callback
- * @dev: iucv-based device
- *
- * disable iucv interrupts
- * invoke callback function of the iucv-based driver
- * shut down iucv, if no iucv-pathes are established anymore
- */
-static int iucv_pm_freeze(struct device *dev)
-{
- int cpu;
- struct iucv_irq_list *p, *n;
- int rc = 0;
-
-#ifdef CONFIG_PM_DEBUG
- printk(KERN_WARNING "iucv_pm_freeze\n");
-#endif
- if (iucv_pm_state != IUCV_PM_FREEZING) {
- for_each_cpu(cpu, &iucv_irq_cpumask)
- smp_call_function_single(cpu, iucv_block_cpu_almost,
- NULL, 1);
- cancel_work_sync(&iucv_work);
- list_for_each_entry_safe(p, n, &iucv_work_queue, list) {
- list_del_init(&p->list);
- iucv_sever_pathid(p->data.ippathid,
- iucv_error_no_listener);
- kfree(p);
- }
- }
- iucv_pm_state = IUCV_PM_FREEZING;
- if (dev->driver && dev->driver->pm && dev->driver->pm->freeze)
- rc = dev->driver->pm->freeze(dev);
- if (iucv_path_table_empty())
- iucv_disable();
- return rc;
-}
-
-/**
- * iucv_pm_thaw() - Thaw PM callback
- * @dev: iucv-based device
- *
- * make iucv ready for use again: allocate path table, declare interrupt buffers
- * and enable iucv interrupts
- * invoke callback function of the iucv-based driver
- */
-static int iucv_pm_thaw(struct device *dev)
-{
- int rc = 0;
-
-#ifdef CONFIG_PM_DEBUG
- printk(KERN_WARNING "iucv_pm_thaw\n");
-#endif
- iucv_pm_state = IUCV_PM_THAWING;
- if (!iucv_path_table) {
- rc = iucv_enable();
- if (rc)
- goto out;
- }
- if (cpumask_empty(&iucv_irq_cpumask)) {
- if (iucv_nonsmp_handler)
- /* enable interrupts on one cpu */
- iucv_allow_cpu(NULL);
- else
- /* enable interrupts on all cpus */
- iucv_setmask_mp();
- }
- if (dev->driver && dev->driver->pm && dev->driver->pm->thaw)
- rc = dev->driver->pm->thaw(dev);
-out:
- return rc;
-}
-
-/**
- * iucv_pm_restore() - Restore PM callback
- * @dev: iucv-based device
- *
- * make iucv ready for use again: allocate path table, declare interrupt buffers
- * and enable iucv interrupts
- * invoke callback function of the iucv-based driver
- */
-static int iucv_pm_restore(struct device *dev)
-{
- int rc = 0;
-
-#ifdef CONFIG_PM_DEBUG
- printk(KERN_WARNING "iucv_pm_restore %p\n", iucv_path_table);
-#endif
- if ((iucv_pm_state != IUCV_PM_RESTORING) && iucv_path_table)
- pr_warn("Suspending Linux did not completely close all IUCV connections\n");
- iucv_pm_state = IUCV_PM_RESTORING;
- if (cpumask_empty(&iucv_irq_cpumask)) {
- rc = iucv_query_maxconn();
- rc = iucv_enable();
- if (rc)
- goto out;
- }
- if (dev->driver && dev->driver->pm && dev->driver->pm->restore)
- rc = dev->driver->pm->restore(dev);
-out:
- return rc;
-}
-
struct iucv_interface iucv_if = {
.message_receive = iucv_message_receive,
.__message_receive = __iucv_message_receive,
projects / platform / kernel / linux-rpi.git / blobdiff