Merge branch 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6

* 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6: (33 commits)
  [S390] s390: hibernation support for s390
  [S390] pm: dcssblk power management callbacks.
  [S390] pm: monreader power management callbacks.
  [S390] pm: monwriter power management callbacks.
  [S390] pm: memory hotplug power management callbacks
  [S390] pm: con3270 power management callbacks.
  [S390] pm: smsgiucv power management callbacks.
  [S390] pm: hvc_iucv power management callbacks
  [S390] PM: af_iucv power management callbacks.
  [S390] pm: netiucv power management callbacks.
  [S390] pm: iucv power management callbacks.
  [S390] iucv: establish reboot notifier
  [S390] pm: power management support for SCLP drivers.
  [S390] pm: tape power management callbacks
  [S390] pm: vmlogrdr power management callbacks
  [S390] pm: vmur driver power management callbacks
  [S390] pm: appldata power management callbacks
  [S390] pm: vmwatchdog power management callbacks.
  [S390] pm: zfcp driver power management callbacks
  [S390] pm: claw driver power management callbacks
  ...

arch/s390/Kconfig

@@ -348,6 +348,9 @@ config ARCH_ENABLE_MEMORY_HOTPLUG
 config ARCH_ENABLE_MEMORY_HOTREMOVE
 	def_bool y
 
+config ARCH_HIBERNATION_POSSIBLE
+       def_bool y if 64BIT
+
 source "mm/Kconfig"
 
 comment "I/O subsystem configuration"
@@ -592,6 +595,12 @@ config SECCOMP
 
 endmenu
 
+menu "Power Management"
+
+source "kernel/power/Kconfig"
+
+endmenu
+
 source "net/Kconfig"
 
 config PCMCIA

arch/s390/Makefile

@@ -88,7 +88,9 @@ LDFLAGS_vmlinux := -e start
 head-y		:= arch/s390/kernel/head.o arch/s390/kernel/init_task.o
 
 core-y		+= arch/s390/mm/ arch/s390/kernel/ arch/s390/crypto/ \
-		   arch/s390/appldata/ arch/s390/hypfs/ arch/s390/kvm/
+		   arch/s390/appldata/ arch/s390/hypfs/ arch/s390/kvm/ \
+		   arch/s390/power/
+
 libs-y		+= arch/s390/lib/
 drivers-y	+= drivers/s390/
 drivers-$(CONFIG_MATHEMU) += arch/s390/math-emu/

arch/s390/appldata/appldata_base.c

@@ -5,7 +5,7 @@
  * Exports appldata_register_ops() and appldata_unregister_ops() for the
  * data gathering modules.
  *
- * Copyright IBM Corp. 2003, 2008
+ * Copyright IBM Corp. 2003, 2009
  *
  * Author: Gerald Schaefer <gerald.schaefer@de.ibm.com>
  */
@@ -26,6 +26,8 @@
 #include <linux/notifier.h>
 #include <linux/cpu.h>
 #include <linux/workqueue.h>
+#include <linux/suspend.h>
+#include <linux/platform_device.h>
 #include <asm/appldata.h>
 #include <asm/timer.h>
 #include <asm/uaccess.h>
@@ -41,6 +43,9 @@
 
 #define TOD_MICRO	0x01000			/* nr. of TOD clock units
 						   for 1 microsecond */
+
+static struct platform_device *appldata_pdev;
+
 /*
  * /proc entries (sysctl)
  */
@@ -86,6 +91,7 @@ static atomic_t appldata_expire_count = ATOMIC_INIT(0);
 static DEFINE_SPINLOCK(appldata_timer_lock);
 static int appldata_interval = APPLDATA_CPU_INTERVAL;
 static int appldata_timer_active;
+static int appldata_timer_suspended = 0;
 
 /*
  * Work queue
@@ -475,6 +481,93 @@ void appldata_unregister_ops(struct appldata_ops *ops)
 /********************** module-ops management <END> **************************/
 
 
+/**************************** suspend / resume *******************************/
+static int appldata_freeze(struct device *dev)
+{
+	struct appldata_ops *ops;
+	int rc;
+	struct list_head *lh;
+
+	get_online_cpus();
+	spin_lock(&appldata_timer_lock);
+	if (appldata_timer_active) {
+		__appldata_vtimer_setup(APPLDATA_DEL_TIMER);
+		appldata_timer_suspended = 1;
+	}
+	spin_unlock(&appldata_timer_lock);
+	put_online_cpus();
+
+	mutex_lock(&appldata_ops_mutex);
+	list_for_each(lh, &appldata_ops_list) {
+		ops = list_entry(lh, struct appldata_ops, list);
+		if (ops->active == 1) {
+			rc = appldata_diag(ops->record_nr, APPLDATA_STOP_REC,
+					(unsigned long) ops->data, ops->size,
+					ops->mod_lvl);
+			if (rc != 0)
+				pr_err("Stopping the data collection for %s "
+				       "failed with rc=%d\n", ops->name, rc);
+		}
+	}
+	mutex_unlock(&appldata_ops_mutex);
+	return 0;
+}
+
+static int appldata_restore(struct device *dev)
+{
+	struct appldata_ops *ops;
+	int rc;
+	struct list_head *lh;
+
+	get_online_cpus();
+	spin_lock(&appldata_timer_lock);
+	if (appldata_timer_suspended) {
+		__appldata_vtimer_setup(APPLDATA_ADD_TIMER);
+		appldata_timer_suspended = 0;
+	}
+	spin_unlock(&appldata_timer_lock);
+	put_online_cpus();
+
+	mutex_lock(&appldata_ops_mutex);
+	list_for_each(lh, &appldata_ops_list) {
+		ops = list_entry(lh, struct appldata_ops, list);
+		if (ops->active == 1) {
+			ops->callback(ops->data);	// init record
+			rc = appldata_diag(ops->record_nr,
+					APPLDATA_START_INTERVAL_REC,
+					(unsigned long) ops->data, ops->size,
+					ops->mod_lvl);
+			if (rc != 0) {
+				pr_err("Starting the data collection for %s "
+				       "failed with rc=%d\n", ops->name, rc);
+			}
+		}
+	}
+	mutex_unlock(&appldata_ops_mutex);
+	return 0;
+}
+
+static int appldata_thaw(struct device *dev)
+{
+	return appldata_restore(dev);
+}
+
+static struct dev_pm_ops appldata_pm_ops = {
+	.freeze		= appldata_freeze,
+	.thaw		= appldata_thaw,
+	.restore	= appldata_restore,
+};
+
+static struct platform_driver appldata_pdrv = {
+	.driver = {
+		.name	= "appldata",
+		.owner	= THIS_MODULE,
+		.pm	= &appldata_pm_ops,
+	},
+};
+/************************* suspend / resume <END> ****************************/
+
+
 /******************************* init / exit *********************************/
 
 static void __cpuinit appldata_online_cpu(int cpu)
@@ -531,11 +624,23 @@ static struct notifier_block __cpuinitdata appldata_nb = {
  */
 static int __init appldata_init(void)
 {
-	int i;
+	int i, rc;
+
+	rc = platform_driver_register(&appldata_pdrv);
+	if (rc)
+		return rc;
 
+	appldata_pdev = platform_device_register_simple("appldata", -1, NULL,
+							0);
+	if (IS_ERR(appldata_pdev)) {
+		rc = PTR_ERR(appldata_pdev);
+		goto out_driver;
+	}
 	appldata_wq = create_singlethread_workqueue("appldata");
-	if (!appldata_wq)
-		return -ENOMEM;
+	if (!appldata_wq) {
+		rc = -ENOMEM;
+		goto out_device;
+	}
 
 	get_online_cpus();
 	for_each_online_cpu(i)
@@ -547,6 +652,12 @@ static int __init appldata_init(void)
 
 	appldata_sysctl_header = register_sysctl_table(appldata_dir_table);
 	return 0;
+
+out_device:
+	platform_device_unregister(appldata_pdev);
+out_driver:
+	platform_driver_unregister(&appldata_pdrv);
+	return rc;
 }
 
 __initcall(appldata_init);

arch/s390/include/asm/ccwdev.h

@@ -1,11 +1,9 @@
 /*
- *  include/asm-s390/ccwdev.h
- *  include/asm-s390x/ccwdev.h
+ * Copyright  IBM Corp. 2002, 2009
  *
- *    Copyright (C) 2002 IBM Deutschland Entwicklung GmbH, IBM Corporation
- *    Author(s): Arnd Bergmann <arndb@de.ibm.com>
+ * Author(s): Arnd Bergmann <arndb@de.ibm.com>
  *
- *  Interface for CCW device drivers
+ * Interface for CCW device drivers
  */
 #ifndef _S390_CCWDEV_H_
 #define _S390_CCWDEV_H_
@@ -104,6 +102,11 @@ struct ccw_device {
  * @set_offline: called when setting device offline
  * @notify: notify driver of device state changes
  * @shutdown: called at device shutdown
+ * @prepare: prepare for pm state transition
+ * @complete: undo work done in @prepare
+ * @freeze: callback for freezing during hibernation snapshotting
+ * @thaw: undo work done in @freeze
+ * @restore: callback for restoring after hibernation
  * @driver: embedded device driver structure
  * @name: device driver name
  */
@@ -116,6 +119,11 @@ struct ccw_driver {
 	int (*set_offline) (struct ccw_device *);
 	int (*notify) (struct ccw_device *, int);
 	void (*shutdown) (struct ccw_device *);
+	int (*prepare) (struct ccw_device *);
+	void (*complete) (struct ccw_device *);
+	int (*freeze)(struct ccw_device *);
+	int (*thaw) (struct ccw_device *);
+	int (*restore)(struct ccw_device *);
 	struct device_driver driver;
 	char *name;
 };
@@ -184,6 +192,7 @@ extern void ccw_device_get_id(struct ccw_device *, struct ccw_dev_id *);
 #define to_ccwdrv(n) container_of(n, struct ccw_driver, driver)
 
 extern struct ccw_device *ccw_device_probe_console(void);
+extern int ccw_device_force_console(void);
 
 // FIXME: these have to go
 extern int _ccw_device_get_subchannel_number(struct ccw_device *);

arch/s390/include/asm/ccwgroup.h

@@ -38,6 +38,11 @@ struct ccwgroup_device {
  * @set_online: function called when device is set online
  * @set_offline: function called when device is set offline
  * @shutdown: function called when device is shut down
+ * @prepare: prepare for pm state transition
+ * @complete: undo work done in @prepare
+ * @freeze: callback for freezing during hibernation snapshotting
+ * @thaw: undo work done in @freeze
+ * @restore: callback for restoring after hibernation
  * @driver: embedded driver structure
  */
 struct ccwgroup_driver {
@@ -51,6 +56,11 @@ struct ccwgroup_driver {
 	int (*set_online) (struct ccwgroup_device *);
 	int (*set_offline) (struct ccwgroup_device *);
 	void (*shutdown)(struct ccwgroup_device *);
+	int (*prepare) (struct ccwgroup_device *);
+	void (*complete) (struct ccwgroup_device *);
+	int (*freeze)(struct ccwgroup_device *);
+	int (*thaw) (struct ccwgroup_device *);
+	int (*restore)(struct ccwgroup_device *);
 
 	struct device_driver driver;
 };

arch/s390/include/asm/suspend.h

@@ -0,0 +1,10 @@
+#ifndef __ASM_S390_SUSPEND_H
+#define __ASM_S390_SUSPEND_H
+
+static inline int arch_prepare_suspend(void)
+{
+	return 0;
+}
+
+#endif
+

arch/s390/include/asm/system.h

@@ -1,11 +1,7 @@
 /*
- *  include/asm-s390/system.h
+ * Copyright IBM Corp. 1999, 2009
  *
- *  S390 version
- *    Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
- *    Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com),
- *
- *  Derived from "include/asm-i386/system.h"
+ * Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
  */
 
 #ifndef __ASM_SYSTEM_H
@@ -469,6 +465,20 @@ extern psw_t sysc_restore_trace_psw;
 extern psw_t io_restore_trace_psw;
 #endif
 
+static inline int tprot(unsigned long addr)
+{
+	int rc = -EFAULT;
+
+	asm volatile(
+		"	tprot	0(%1),0\n"
+		"0:	ipm	%0\n"
+		"	srl	%0,28\n"
+		"1:\n"
+		EX_TABLE(0b,1b)
+		: "+d" (rc) : "a" (addr) : "cc");
+	return rc;
+}
+
 #endif /* __KERNEL__ */
 
 #endif

arch/s390/kernel/early.c

@@ -1,7 +1,7 @@
 /*
  *  arch/s390/kernel/early.c
  *
- *    Copyright IBM Corp. 2007
+ *    Copyright IBM Corp. 2007, 2009
  *    Author(s): Hongjie Yang <hongjie@us.ibm.com>,
  *		 Heiko Carstens <heiko.carstens@de.ibm.com>
  */
@@ -210,7 +210,7 @@ static noinline __init void detect_machine_type(void)
 		machine_flags |= MACHINE_FLAG_VM;
 }
 
-static __init void early_pgm_check_handler(void)
+static void early_pgm_check_handler(void)
 {
 	unsigned long addr;
 	const struct exception_table_entry *fixup;
@@ -222,7 +222,7 @@ static __init void early_pgm_check_handler(void)
 	S390_lowcore.program_old_psw.addr = fixup->fixup | PSW_ADDR_AMODE;
 }
 
-static noinline __init void setup_lowcore_early(void)
+void setup_lowcore_early(void)
 {
 	psw_t psw;
 

arch/s390/kernel/mem_detect.c

@@ -1,6 +1,7 @@
 /*
- *    Copyright IBM Corp. 2008
- *    Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>
+ * Copyright IBM Corp. 2008, 2009
+ *
+ * Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>
  */
 
 #include <linux/kernel.h>
@@ -9,20 +10,6 @@
 #include <asm/sclp.h>
 #include <asm/setup.h>
 
-static inline int tprot(unsigned long addr)
-{
-	int rc = -EFAULT;
-
-	asm volatile(
-		"	tprot	0(%1),0\n"
-		"0:	ipm	%0\n"
-		"	srl	%0,28\n"
-		"1:\n"
-		EX_TABLE(0b,1b)
-		: "+d" (rc) : "a" (addr) : "cc");
-	return rc;
-}
-
 #define ADDR2G (1ULL << 31)
 
 static void find_memory_chunks(struct mem_chunk chunk[])