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Commit 6a454f71 authored by Linus Torvalds's avatar Linus Torvalds
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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
  ...
parents d613839e 155af2f9
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arch/s390/Kconfig
View file @ 6a454f71
......@@ -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
View file @ 6a454f71
......@@ -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
View file @ 6a454f71
......@@ -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
View file @ 6a454f71
/*
* 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
View file @ 6a454f71
......@@ -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 → 100644
View file @ 6a454f71
#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
View file @ 6a454f71
/*
* 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
View file @ 6a454f71
/*
* 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
View file @ 6a454f71
/*
* 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[])
......
arch/s390/kernel/smp.c
View file @ 6a454f71
/*
* arch/s390/kernel/smp.c
*
* Copyright IBM Corp. 1999,2007
* Copyright IBM Corp. 1999, 2009
* Author(s): Denis Joseph Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com),
* Martin Schwidefsky (schwidefsky@de.ibm.com)
* Heiko Carstens (heiko.carstens@de.ibm.com)
......@@ -1031,6 +1031,42 @@ static ssize_t dispatching_store(struct sysdev_class *dev, const char *buf,
static SYSDEV_CLASS_ATTR(dispatching, 0644, dispatching_show,
dispatching_store);
/*
* If the resume kernel runs on another cpu than the suspended kernel,
* we have to switch the cpu IDs in the logical map.
*/
void smp_switch_boot_cpu_in_resume(u32 resume_phys_cpu_id,
struct _lowcore *suspend_lowcore)
{
int cpu, suspend_cpu_id, resume_cpu_id;
u32 suspend_phys_cpu_id;
suspend_phys_cpu_id = __cpu_logical_map[suspend_lowcore->cpu_nr];
suspend_cpu_id = suspend_lowcore->cpu_nr;
for_each_present_cpu(cpu) {
if (__cpu_logical_map[cpu] == resume_phys_cpu_id) {
resume_cpu_id = cpu;
goto found;
}
}
panic("Could not find resume cpu in logical map.\n");
found:
printk("Resume cpu ID: %i/%i\n", resume_phys_cpu_id, resume_cpu_id);
printk("Suspend cpu ID: %i/%i\n", suspend_phys_cpu_id, suspend_cpu_id);
__cpu_logical_map[resume_cpu_id] = suspend_phys_cpu_id;
__cpu_logical_map[suspend_cpu_id] = resume_phys_cpu_id;
lowcore_ptr[suspend_cpu_id]->cpu_addr = resume_phys_cpu_id;
}
u32 smp_get_phys_cpu_id(void)
{
return __cpu_logical_map[smp_processor_id()];
}
static int __init topology_init(void)
{
int cpu;
......
arch/s390/mm/pgtable.c
View file @ 6a454f71
......@@ -313,3 +313,22 @@ int s390_enable_sie(void)
return 0;
}
EXPORT_SYMBOL_GPL(s390_enable_sie);
#ifdef CONFIG_DEBUG_PAGEALLOC
#ifdef CONFIG_HIBERNATION
bool kernel_page_present(struct page *page)
{
unsigned long addr;
int cc;
addr = page_to_phys(page);
asm("lra %1,0(%1)\n"
"ipm %0\n"
"srl %0,28"
:"=d"(cc),"+a"(addr)::"cc");
return cc == 0;
}
#endif /* CONFIG_HIBERNATION */
#endif /* CONFIG_DEBUG_PAGEALLOC */
arch/s390/power/Makefile 0 → 100644
View file @ 6a454f71
#
# Makefile for s390 PM support
#
obj-$(CONFIG_HIBERNATION) += suspend.o
obj-$(CONFIG_HIBERNATION) += swsusp.o
obj-$(CONFIG_HIBERNATION) += swsusp_64.o
obj-$(CONFIG_HIBERNATION) += swsusp_asm64.o
arch/s390/power/suspend.c 0 → 100644
View file @ 6a454f71
/*
* Suspend support specific for s390.
*
* Copyright IBM Corp. 2009
*
* Author(s): Hans-Joachim Picht <hans@linux.vnet.ibm.com>
*/
#include <linux/mm.h>
#include <linux/suspend.h>
#include <linux/reboot.h>
#include <linux/pfn.h>
#include <asm/sections.h>
#include <asm/ipl.h>
/*
* References to section boundaries
*/
extern const void __nosave_begin, __nosave_end;
/*
* check if given pfn is in the 'nosave' or in the read only NSS section
*/
int pfn_is_nosave(unsigned long pfn)
{
unsigned long nosave_begin_pfn = __pa(&__nosave_begin) >> PAGE_SHIFT;
unsigned long nosave_end_pfn = PAGE_ALIGN(__pa(&__nosave_end))
>> PAGE_SHIFT;
unsigned long eshared_pfn = PFN_DOWN(__pa(&_eshared)) - 1;
unsigned long stext_pfn = PFN_DOWN(__pa(&_stext));
if (pfn >= nosave_begin_pfn && pfn < nosave_end_pfn)
return 1;
if (pfn >= stext_pfn && pfn <= eshared_pfn) {
if (ipl_info.type == IPL_TYPE_NSS)
return 1;
} else if ((tprot(pfn * PAGE_SIZE) && pfn > 0))
return 1;
return 0;
}
arch/s390/power/swsusp.c 0 → 100644
View file @ 6a454f71
/*
* Support for suspend and resume on s390
*
* Copyright IBM Corp. 2009
*
* Author(s): Hans-Joachim Picht <hans@linux.vnet.ibm.com>
*
*/
/*
* save CPU registers before creating a hibernation image and before
* restoring the memory state from it
*/
void save_processor_state(void)
{
/* implentation contained in the
* swsusp_arch_suspend function
*/
}
/*
* restore the contents of CPU registers
*/
void restore_processor_state(void)
{
/* implentation contained in the
* swsusp_arch_resume function
*/
}
arch/s390/power/swsusp_64.c 0 → 100644
View file @ 6a454f71
/*
* Support for suspend and resume on s390
*
* Copyright IBM Corp. 2009
*
* Author(s): Hans-Joachim Picht <hans@linux.vnet.ibm.com>
*
*/
#include <asm/system.h>
#include <linux/interrupt.h>
void do_after_copyback(void)
{
mb();
}
arch/s390/power/swsusp_asm64.S 0 → 100644
View file @ 6a454f71
/*
* S390 64-bit swsusp implementation
*
* Copyright IBM Corp. 2009
*
* Author(s): Hans-Joachim Picht <hans@linux.vnet.ibm.com>
* Michael Holzheu <holzheu@linux.vnet.ibm.com>
*/
#include <asm/page.h>
#include <asm/ptrace.h>
#include <asm/asm-offsets.h>
/*
* Save register context in absolute 0 lowcore and call swsusp_save() to
* create in-memory kernel image. The context is saved in the designated
* "store status" memory locations (see POP).
* We return from this function twice. The first time during the suspend to
* disk process. The second time via the swsusp_arch_resume() function
* (see below) in the resume process.
* This function runs with disabled interrupts.
*/
.section .text
.align 2
.globl swsusp_arch_suspend
swsusp_arch_suspend:
stmg %r6,%r15,__SF_GPRS(%r15)
lgr %r1,%r15
aghi %r15,-STACK_FRAME_OVERHEAD
stg %r1,__SF_BACKCHAIN(%r15)
/* Deactivate DAT */
stnsm __SF_EMPTY(%r15),0xfb
/* Switch off lowcore protection */
stctg %c0,%c0,__SF_EMPTY(%r15)
ni __SF_EMPTY+4(%r15),0xef
lctlg %c0,%c0,__SF_EMPTY(%r15)
/* Store prefix register on stack */
stpx __SF_EMPTY(%r15)
/* Setup base register for lowcore (absolute 0) */
llgf %r1,__SF_EMPTY(%r15)
/* Get pointer to save area */
aghi %r1,0x1000
/* Store registers */
mvc 0x318(4,%r1),__SF_EMPTY(%r15) /* move prefix to lowcore */
stfpc 0x31c(%r1) /* store fpu control */
std 0,0x200(%r1) /* store f0 */
std 1,0x208(%r1) /* store f1 */
std 2,0x210(%r1) /* store f2 */
std 3,0x218(%r1) /* store f3 */
std 4,0x220(%r1) /* store f4 */
std 5,0x228(%r1) /* store f5 */
std 6,0x230(%r1) /* store f6 */
std 7,0x238(%r1) /* store f7 */
std 8,0x240(%r1) /* store f8 */
std 9,0x248(%r1) /* store f9 */
std 10,0x250(%r1) /* store f10 */
std 11,0x258(%r1) /* store f11 */
std 12,0x260(%r1) /* store f12 */
std 13,0x268(%r1) /* store f13 */
std 14,0x270(%r1) /* store f14 */
std 15,0x278(%r1) /* store f15 */
stam %a0,%a15,0x340(%r1) /* store access registers */
stctg %c0,%c15,0x380(%r1) /* store control registers */
stmg %r0,%r15,0x280(%r1) /* store general registers */
stpt 0x328(%r1) /* store timer */
stckc 0x330(%r1) /* store clock comparator */
/* Activate DAT */
stosm __SF_EMPTY(%r15),0x04
/* Set prefix page to zero */
xc __SF_EMPTY(4,%r15),__SF_EMPTY(%r15)
spx __SF_EMPTY(%r15)
/* Setup lowcore */
brasl %r14,setup_lowcore_early
/* Save image */
brasl %r14,swsusp_save
/* Switch on lowcore protection */
stctg %c0,%c0,__SF_EMPTY(%r15)
oi __SF_EMPTY+4(%r15),0x10
lctlg %c0,%c0,__SF_EMPTY(%r15)
/* Restore prefix register and return */
lghi %r1,0x1000
spx 0x318(%r1)
lmg %r6,%r15,STACK_FRAME_OVERHEAD + __SF_GPRS(%r15)
lghi %r2,0
br %r14
/*
* Restore saved memory image to correct place and restore register context.
* Then we return to the function that called swsusp_arch_suspend().
* swsusp_arch_resume() runs with disabled interrupts.
*/
.globl swsusp_arch_resume
swsusp_arch_resume:
stmg %r6,%r15,__SF_GPRS(%r15)
lgr %r1,%r15
aghi %r15,-STACK_FRAME_OVERHEAD
stg %r1,__SF_BACKCHAIN(%r15)
/* Save boot cpu number */
brasl %r14,smp_get_phys_cpu_id
lgr %r10,%r2
/* Deactivate DAT */
stnsm __SF_EMPTY(%r15),0xfb
/* Switch off lowcore protection */
stctg %c0,%c0,__SF_EMPTY(%r15)
ni __SF_EMPTY+4(%r15),0xef
lctlg %c0,%c0,__SF_EMPTY(%r15)
/* Set prefix page to zero */
xc __SF_EMPTY(4,%r15),__SF_EMPTY(%r15)
spx __SF_EMPTY(%r15)
/* Restore saved image */
larl %r1,restore_pblist
lg %r1,0(%r1)
ltgr %r1,%r1
jz 2f
0:
lg %r2,8(%r1)
lg %r4,0(%r1)
lghi %r3,PAGE_SIZE
lghi %r5,PAGE_SIZE
1:
mvcle %r2,%r4,0
jo 1b
lg %r1,16(%r1)
ltgr %r1,%r1
jnz 0b
2:
ptlb /* flush tlb */
/* Restore registers */
lghi %r13,0x1000 /* %r1 = pointer to save arae */
spt 0x328(%r13) /* reprogram timer */
//sckc 0x330(%r13) /* set clock comparator */
lctlg %c0,%c15,0x380(%r13) /* load control registers */
lam %a0,%a15,0x340(%r13) /* load access registers */
lfpc 0x31c(%r13) /* load fpu control */
ld 0,0x200(%r13) /* load f0 */
ld 1,0x208(%r13) /* load f1 */
ld 2,0x210(%r13) /* load f2 */
ld 3,0x218(%r13) /* load f3 */
ld 4,0x220(%r13) /* load f4 */
ld 5,0x228(%r13) /* load f5 */
ld 6,0x230(%r13) /* load f6 */
ld 7,0x238(%r13) /* load f7 */
ld 8,0x240(%r13) /* load f8 */
ld 9,0x248(%r13) /* load f9 */
ld 10,0x250(%r13) /* load f10 */
ld 11,0x258(%r13) /* load f11 */
ld 12,0x260(%r13) /* load f12 */
ld 13,0x268(%r13) /* load f13 */
ld 14,0x270(%r13) /* load f14 */
ld 15,0x278(%r13) /* load f15 */
/* Load old stack */
lg %r15,0x2f8(%r13)
/* Pointer to save arae */
lghi %r13,0x1000
/* Switch CPUs */
lgr %r2,%r10 /* get cpu id */
llgf %r3,0x318(%r13)
brasl %r14,smp_switch_boot_cpu_in_resume
/* Restore prefix register */
spx 0x318(%r13)
/* Switch on lowcore protection */
stctg %c0,%c0,__SF_EMPTY(%r15)
oi __SF_EMPTY+4(%r15),0x10
lctlg %c0,%c0,__SF_EMPTY(%r15)
/* Activate DAT */
stosm __SF_EMPTY(%r15),0x04
/* Return 0 */
lmg %r6,%r15,STACK_FRAME_OVERHEAD + __SF_GPRS(%r15)
lghi %r2,0
br %r14
drivers/char/hvc_iucv.c
View file @ 6a454f71
......@@ -4,7 +4,7 @@
* This HVC device driver provides terminal access using
* z/VM IUCV communication paths.
*
* Copyright IBM Corp. 2008
* Copyright IBM Corp. 2008, 2009
*
* Author(s): Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
*/
......@@ -15,6 +15,7 @@
#include <asm/ebcdic.h>
#include <linux/ctype.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/init.h>
#include <linux/mempool.h>
#include <linux/moduleparam.h>
......@@ -74,6 +75,7 @@ struct hvc_iucv_private {
wait_queue_head_t sndbuf_waitq; /* wait for send completion */
struct list_head tty_outqueue; /* outgoing IUCV messages */
struct list_head tty_inqueue; /* incoming IUCV messages */
struct device *dev; /* device structure */
};
struct iucv_tty_buffer {
......@@ -542,7 +544,68 @@ static void flush_sndbuf_sync(struct hvc_iucv_private *priv)
if (sync_wait)
wait_event_timeout(priv->sndbuf_waitq,
tty_outqueue_empty(priv), HZ);
tty_outqueue_empty(priv), HZ/10);
}
/**
* hvc_iucv_hangup() - Sever IUCV path and schedule hvc tty hang up
* @priv: Pointer to hvc_iucv_private structure
*
* This routine severs an existing IUCV communication path and hangs
* up the underlying HVC terminal device.
* The hang-up occurs only if an IUCV communication path is established;
* otherwise there is no need to hang up the terminal device.
*
* The IUCV HVC hang-up is separated into two steps:
* 1. After the IUCV path has been severed, the iucv_state is set to
* IUCV_SEVERED.
* 2. Later, when the HVC thread calls hvc_iucv_get_chars(), the
* IUCV_SEVERED state causes the tty hang-up in the HVC layer.
*
* If the tty has not yet been opened, clean up the hvc_iucv_private
* structure to allow re-connects.
* If the tty has been opened, let get_chars() return -EPIPE to signal
* the HVC layer to hang up the tty and, if so, wake up the HVC thread
* to call get_chars()...
*
* Special notes on hanging up a HVC terminal instantiated as console:
* Hang-up: 1. do_tty_hangup() replaces file ops (= hung_up_tty_fops)
* 2. do_tty_hangup() calls tty->ops->close() for console_filp
* => no hangup notifier is called by HVC (default)
* 2. hvc_close() returns because of tty_hung_up_p(filp)
* => no delete notifier is called!
* Finally, the back-end is not being notified, thus, the tty session is
* kept active (TTY_OPEN) to be ready for re-connects.
*
* Locking: spin_lock(&priv->lock) w/o disabling bh
*/
static void hvc_iucv_hangup(struct hvc_iucv_private *priv)
{
struct iucv_path *path;
path = NULL;
spin_lock(&priv->lock);
if (priv->iucv_state == IUCV_CONNECTED) {
path = priv->path;
priv->path = NULL;
priv->iucv_state = IUCV_SEVERED;
if (priv->tty_state == TTY_CLOSED)
hvc_iucv_cleanup(priv);
else
/* console is special (see above) */
if (priv->is_console) {
hvc_iucv_cleanup(priv);
priv->tty_state = TTY_OPENED;
} else
hvc_kick();
}
spin_unlock(&priv->lock);
/* finally sever path (outside of priv->lock due to lock ordering) */
if (path) {
iucv_path_sever(path, NULL);
iucv_path_free(path);
}
}
/**
......@@ -735,11 +798,8 @@ static int hvc_iucv_path_pending(struct iucv_path *path,
* @ipuser: User specified data for this path
* (AF_IUCV: port/service name and originator port)
*
* The function also severs the path (as required by the IUCV protocol) and
* sets the iucv state to IUCV_SEVERED for the associated struct
* hvc_iucv_private instance. Later, the IUCV_SEVERED state triggers a tty
* hangup (hvc_iucv_get_chars() / hvc_iucv_write()).
* If tty portion of the HVC is closed, clean up the outqueue.
* This function calls the hvc_iucv_hangup() function for the
* respective IUCV HVC terminal.
*
* Locking: struct hvc_iucv_private->lock
*/
......@@ -747,33 +807,7 @@ static void hvc_iucv_path_severed(struct iucv_path *path, u8 ipuser[16])
{
struct hvc_iucv_private *priv = path->private;
spin_lock(&priv->lock);
priv->iucv_state = IUCV_SEVERED;
/* If the tty has not yet been opened, clean up the hvc_iucv_private
* structure to allow re-connects.
* This is also done for our console device because console hangups
* are handled specially and no notifier is called by HVC.
* The tty session is active (TTY_OPEN) and ready for re-connects...
*
* If it has been opened, let get_chars() return -EPIPE to signal the
* HVC layer to hang up the tty.
* If so, we need to wake up the HVC thread to call get_chars()...
*/
priv->path = NULL;
if (priv->tty_state == TTY_CLOSED)
hvc_iucv_cleanup(priv);
else
if (priv->is_console) {
hvc_iucv_cleanup(priv);
priv->tty_state = TTY_OPENED;
} else
hvc_kick();
spin_unlock(&priv->lock);
/* finally sever path (outside of priv->lock due to lock ordering) */
iucv_path_sever(path, ipuser);
iucv_path_free(path);
hvc_iucv_hangup(priv);
}
/**
......@@ -853,6 +887,37 @@ static void hvc_iucv_msg_complete(struct iucv_path *path,
destroy_tty_buffer_list(&list_remove);
}
/**
* hvc_iucv_pm_freeze() - Freeze PM callback
* @dev: IUVC HVC terminal device
*
* Sever an established IUCV communication path and
* trigger a hang-up of the underlying HVC terminal.
*/
static int hvc_iucv_pm_freeze(struct device *dev)
{
struct hvc_iucv_private *priv = dev_get_drvdata(dev);
local_bh_disable();
hvc_iucv_hangup(priv);
local_bh_enable();
return 0;
}
/**
* hvc_iucv_pm_restore_thaw() - Thaw and restore PM callback
* @dev: IUVC HVC terminal device
*
* Wake up the HVC thread to trigger hang-up and respective
* HVC back-end notifier invocations.
*/
static int hvc_iucv_pm_restore_thaw(struct device *dev)
{
hvc_kick();
return 0;
}
/* HVC operations */
static struct hv_ops hvc_iucv_ops = {
......@@ -863,6 +928,20 @@ static struct hv_ops hvc_iucv_ops = {
.notifier_hangup = hvc_iucv_notifier_hangup,
};
/* Suspend / resume device operations */
static struct dev_pm_ops hvc_iucv_pm_ops = {
.freeze = hvc_iucv_pm_freeze,
.thaw = hvc_iucv_pm_restore_thaw,
.restore = hvc_iucv_pm_restore_thaw,
};
/* IUCV HVC device driver */
static struct device_driver hvc_iucv_driver = {
.name = KMSG_COMPONENT,
.bus = &iucv_bus,
.pm = &hvc_iucv_pm_ops,
};
/**
* hvc_iucv_alloc() - Allocates a new struct hvc_iucv_private instance
* @id: hvc_iucv_table index
......@@ -897,14 +976,12 @@ static int __init hvc_iucv_alloc(int id, unsigned int is_console)
/* set console flag */
priv->is_console = is_console;
/* finally allocate hvc */
/* allocate hvc device */
priv->hvc = hvc_alloc(HVC_IUCV_MAGIC + id, /* PAGE_SIZE */
HVC_IUCV_MAGIC + id, &hvc_iucv_ops, 256);
if (IS_ERR(priv->hvc)) {
rc = PTR_ERR(priv->hvc);
free_page((unsigned long) priv->sndbuf);
kfree(priv);
return rc;
goto out_error_hvc;
}
/* notify HVC thread instead of using polling */
......@@ -915,8 +992,45 @@ static int __init hvc_iucv_alloc(int id, unsigned int is_console)
memcpy(priv->srv_name, name, 8);
ASCEBC(priv->srv_name, 8);
/* create and setup device */
priv->dev = kzalloc(sizeof(*priv->dev), GFP_KERNEL);
if (!priv->dev) {
rc = -ENOMEM;
goto out_error_dev;
}
dev_set_name(priv->dev, "hvc_iucv%d", id);
dev_set_drvdata(priv->dev, priv);
priv->dev->bus = &iucv_bus;
priv->dev->parent = iucv_root;
priv->dev->driver = &hvc_iucv_driver;
priv->dev->release = (void (*)(struct device *)) kfree;
rc = device_register(priv->dev);
if (rc) {
kfree(priv->dev);
goto out_error_dev;
}
hvc_iucv_table[id] = priv;
return 0;
out_error_dev:
hvc_remove(priv->hvc);
out_error_hvc:
free_page((unsigned long) priv->sndbuf);
kfree(priv);
return rc;
}
/**
* hvc_iucv_destroy() - Destroy and free hvc_iucv_private instances
*/
static void __init hvc_iucv_destroy(struct hvc_iucv_private *priv)
{
hvc_remove(priv->hvc);
device_unregister(priv->dev);
free_page((unsigned long) priv->sndbuf);
kfree(priv);
}
/**
......@@ -1109,6 +1223,11 @@ static int __init hvc_iucv_init(void)
goto out_error;
}
/* register IUCV HVC device driver */
rc = driver_register(&hvc_iucv_driver);
if (rc)
goto out_error;
/* parse hvc_iucv_allow string and create z/VM user ID filter list */
if (hvc_iucv_filter_string) {
rc = hvc_iucv_setup_filter(hvc_iucv_filter_string);
......@@ -1183,15 +1302,14 @@ static int __init hvc_iucv_init(void)
iucv_unregister(&hvc_iucv_handler, 0);
out_error_hvc:
for (i = 0; i < hvc_iucv_devices; i++)
if (hvc_iucv_table[i]) {
if (hvc_iucv_table[i]->hvc)
hvc_remove(hvc_iucv_table[i]->hvc);
kfree(hvc_iucv_table[i]);
}
if (hvc_iucv_table[i])
hvc_iucv_destroy(hvc_iucv_table[i]);
out_error_memory:
mempool_destroy(hvc_iucv_mempool);
kmem_cache_destroy(hvc_iucv_buffer_cache);
out_error:
if (hvc_iucv_filter)
kfree(hvc_iucv_filter);
hvc_iucv_devices = 0; /* ensure that we do not provide any device */
return rc;
}
......
drivers/s390/block/dasd.c
View file @ 6a454f71
......@@ -5,8 +5,7 @@
* Carsten Otte <Cotte@de.ibm.com>
* Martin Schwidefsky <schwidefsky@de.ibm.com>
* Bugreports.to..: <Linux390@de.ibm.com>
* (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 1999-2001
*
* Copyright IBM Corp. 1999, 2009
*/
#define KMSG_COMPONENT "dasd"
......@@ -61,6 +60,7 @@ static int dasd_flush_block_queue(struct dasd_block *);
static void dasd_device_tasklet(struct dasd_device *);
static void dasd_block_tasklet(struct dasd_block *);
static void do_kick_device(struct work_struct *);
static void do_restore_device(struct work_struct *);
static void dasd_return_cqr_cb(struct dasd_ccw_req *, void *);
static void dasd_device_timeout(unsigned long);
static void dasd_block_timeout(unsigned long);
......@@ -109,6 +109,7 @@ struct dasd_device *dasd_alloc_device(void)
device->timer.function = dasd_device_timeout;
device->timer.data = (unsigned long) device;
INIT_WORK(&device->kick_work, do_kick_device);
INIT_WORK(&device->restore_device, do_restore_device);
device->state = DASD_STATE_NEW;
device->target = DASD_STATE_NEW;
......@@ -511,6 +512,25 @@ void dasd_kick_device(struct dasd_device *device)
schedule_work(&device->kick_work);
}
/*
* 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. */
schedule_work(&device->restore_device);
}
/*
* Set the target state for a device and starts the state change.
*/
......@@ -908,6 +928,12 @@ int dasd_start_IO(struct dasd_ccw_req *cqr)
DBF_DEV_EVENT(DBF_DEBUG, device, "%s",
"start_IO: -EIO device gone, retry");
break;
case -EINVAL:
/* most likely caused in power management context */
DBF_DEV_EVENT(DBF_DEBUG, device, "%s",
"start_IO: -EINVAL device currently "
"not accessible");
break;
default:
/* internal error 11 - unknown rc */
snprintf(errorstring, ERRORLENGTH, "11 %d", rc);
......@@ -2400,6 +2426,12 @@ int dasd_generic_notify(struct ccw_device *cdev, int event)
case CIO_OPER:
/* FIXME: add a sanity check. */
device->stopped &= ~DASD_STOPPED_DC_WAIT;
if (device->stopped & DASD_UNRESUMED_PM) {
device->stopped &= ~DASD_UNRESUMED_PM;
dasd_restore_device(device);
ret = 1;
break;
}
dasd_schedule_device_bh(device);
if (device->block)
dasd_schedule_block_bh(device->block);
......@@ -2410,6 +2442,79 @@ int dasd_generic_notify(struct ccw_device *cdev, int event)
return ret;
}
int dasd_generic_pm_freeze(struct ccw_device *cdev)
{
struct dasd_ccw_req *cqr, *n;
int rc;
struct list_head freeze_queue;
struct dasd_device *device = dasd_device_from_cdev(cdev);
if (IS_ERR(device))
return PTR_ERR(device);
/* disallow new I/O */
device->stopped |= DASD_STOPPED_PM;
/* clear active requests */
INIT_LIST_HEAD(&freeze_queue);
spin_lock_irq(get_ccwdev_lock(cdev));
rc = 0;
list_for_each_entry_safe(cqr, n, &device->ccw_queue, devlist) {
/* Check status and move request to flush_queue */
if (cqr->status == DASD_CQR_IN_IO) {
rc = device->discipline->term_IO(cqr);
if (rc) {
/* unable to terminate requeust */
dev_err(&device->cdev->dev,
"Unable to terminate request %p "
"on suspend\n", cqr);
spin_unlock_irq(get_ccwdev_lock(cdev));
dasd_put_device(device);
return rc;
}
}
list_move_tail(&cqr->devlist, &freeze_queue);
}
spin_unlock_irq(get_ccwdev_lock(cdev));
list_for_each_entry_safe(cqr, n, &freeze_queue, devlist) {
wait_event(dasd_flush_wq,
(cqr->status != DASD_CQR_CLEAR_PENDING));
if (cqr->status == DASD_CQR_CLEARED)
cqr->status = DASD_CQR_QUEUED;
}
/* move freeze_queue to start of the ccw_queue */
spin_lock_irq(get_ccwdev_lock(cdev));
list_splice_tail(&freeze_queue, &device->ccw_queue);
spin_unlock_irq(get_ccwdev_lock(cdev));
if (device->discipline->freeze)
rc = device->discipline->freeze(device);
dasd_put_device(device);
return rc;
}
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);
dasd_schedule_device_bh(device);
if (device->block)
dasd_schedule_block_bh(device->block);
if (device->discipline->restore)
rc = device->discipline->restore(device);
dasd_put_device(device);
return rc;
}
EXPORT_SYMBOL_GPL(dasd_generic_restore_device);
static struct dasd_ccw_req *dasd_generic_build_rdc(struct dasd_device *device,
void *rdc_buffer,
int rdc_buffer_size,
......
drivers/s390/block/dasd_devmap.c
View file @ 6a454f71
......@@ -1098,6 +1098,7 @@ dasd_get_uid(struct ccw_device *cdev, struct dasd_uid *uid)
spin_unlock(&dasd_devmap_lock);
return 0;
}
EXPORT_SYMBOL_GPL(dasd_get_uid);
/*
* Register the given device unique identifier into devmap struct.
......
drivers/s390/block/dasd_eckd.c
View file @ 6a454f71
......@@ -5,10 +5,9 @@
* Carsten Otte <Cotte@de.ibm.com>
* Martin Schwidefsky <schwidefsky@de.ibm.com>
* Bugreports.to..: <Linux390@de.ibm.com>
* (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 1999,2000
* Copyright IBM Corp. 1999, 2009
* EMC Symmetrix ioctl Copyright EMC Corporation, 2008
* Author.........: Nigel Hislop <hislop_nigel@emc.com>
*
*/
#define KMSG_COMPONENT "dasd"
......@@ -104,17 +103,6 @@ dasd_eckd_set_online(struct ccw_device *cdev)
return dasd_generic_set_online(cdev, &dasd_eckd_discipline);
}
static struct ccw_driver dasd_eckd_driver = {
.name = "dasd-eckd",
.owner = THIS_MODULE,
.ids = dasd_eckd_ids,
.probe = dasd_eckd_probe,
.remove = dasd_generic_remove,
.set_offline = dasd_generic_set_offline,
.set_online = dasd_eckd_set_online,
.notify = dasd_generic_notify,
};
static const int sizes_trk0[] = { 28, 148, 84 };
#define LABEL_SIZE 140
......@@ -3236,6 +3224,98 @@ static void dasd_eckd_dump_sense(struct dasd_device *device,
dasd_eckd_dump_sense_ccw(device, req, irb);
}
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;
}
int dasd_eckd_restore_device(struct dasd_device *device)
{
struct dasd_eckd_private *private;
int is_known, rc;
struct dasd_uid temp_uid;
/* allow new IO again */
device->stopped &= ~DASD_STOPPED_PM;
private = (struct dasd_eckd_private *) device->private;
/* Read Configuration Data */
rc = dasd_eckd_read_conf(device);
if (rc)
goto out_err;
/* Generate device unique id and register in devmap */
rc = dasd_eckd_generate_uid(device, &private->uid);
dasd_get_uid(device->cdev, &temp_uid);
if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0)
dev_err(&device->cdev->dev, "The UID of the DASD has changed\n");
if (rc)
goto out_err;
dasd_set_uid(device->cdev, &private->uid);
/* register lcu with alias handling, enable PAV if this is a new lcu */
is_known = dasd_alias_make_device_known_to_lcu(device);
if (is_known < 0)
return is_known;
if (!is_known) {
/* new lcu found */
rc = dasd_eckd_validate_server(device); /* will switch pav on */
if (rc)
goto out_err;
}
/* Read Feature Codes */
rc = dasd_eckd_read_features(device);
if (rc)
goto out_err;
/* Read Device Characteristics */
memset(&private->rdc_data, 0, sizeof(private->rdc_data));
rc = dasd_generic_read_dev_chars(device, "ECKD",
&private->rdc_data, 64);
if (rc) {
DBF_EVENT(DBF_WARNING,
"Read device characteristics failed, rc=%d for "
"device: %s", rc, dev_name(&device->cdev->dev));
goto out_err;
}
/* add device to alias management */
dasd_alias_add_device(device);
return 0;
out_err:
/*
* if the resume failed for the DASD we put it in
* an UNRESUMED stop state
*/
device->stopped |= DASD_UNRESUMED_PM;
return 0;
}
static struct ccw_driver dasd_eckd_driver = {
.name = "dasd-eckd",
.owner = THIS_MODULE,
.ids = dasd_eckd_ids,
.probe = dasd_eckd_probe,
.remove = dasd_generic_remove,
.set_offline = dasd_generic_set_offline,
.set_online = dasd_eckd_set_online,
.notify = dasd_generic_notify,
.freeze = dasd_generic_pm_freeze,
.thaw = dasd_generic_restore_device,
.restore = dasd_generic_restore_device,
};
/*
* max_blocks is dependent on the amount of storage that is available
......@@ -3274,6 +3354,8 @@ static struct dasd_discipline dasd_eckd_discipline = {
.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,
};
static int __init
......
drivers/s390/block/dasd_fba.c
View file @ 6a454f71
......@@ -2,8 +2,7 @@
* File...........: linux/drivers/s390/block/dasd_fba.c
* Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
* Bugreports.to..: <Linux390@de.ibm.com>
* (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 1999,2000
*
* Copyright IBM Corp. 1999, 2009
*/
#define KMSG_COMPONENT "dasd"
......@@ -75,6 +74,9 @@ static struct ccw_driver dasd_fba_driver = {
.set_offline = dasd_generic_set_offline,
.set_online = dasd_fba_set_online,
.notify = dasd_generic_notify,
.freeze = dasd_generic_pm_freeze,
.thaw = dasd_generic_restore_device,
.restore = dasd_generic_restore_device,
};
static void
......
drivers/s390/block/dasd_int.h
View file @ 6a454f71
......@@ -4,8 +4,7 @@
* Horst Hummel <Horst.Hummel@de.ibm.com>
* Martin Schwidefsky <schwidefsky@de.ibm.com>
* Bugreports.to..: <Linux390@de.ibm.com>
* (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 1999,2000
*
* Copyright IBM Corp. 1999, 2009
*/
#ifndef DASD_INT_H
......@@ -295,6 +294,10 @@ struct dasd_discipline {
int (*fill_geometry) (struct dasd_block *, struct hd_geometry *);
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 *);
};
extern struct dasd_discipline *dasd_diag_discipline_pointer;
......@@ -367,6 +370,7 @@ struct dasd_device {
atomic_t tasklet_scheduled;
struct tasklet_struct tasklet;
struct work_struct kick_work;
struct work_struct restore_device;
struct timer_list timer;
debug_info_t *debug_area;
......@@ -410,6 +414,8 @@ struct dasd_block {
#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 */
/* per device flags */
#define DASD_FLAG_OFFLINE 3 /* device is in offline processing */
......@@ -556,6 +562,7 @@ void dasd_free_block(struct dasd_block *);
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_add_request_head(struct dasd_ccw_req *);
void dasd_add_request_tail(struct dasd_ccw_req *);
......@@ -578,6 +585,8 @@ int dasd_generic_set_online(struct ccw_device *, struct dasd_discipline *);
int dasd_generic_set_offline (struct ccw_device *cdev);
int dasd_generic_notify(struct ccw_device *, int);
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 *);
int dasd_generic_read_dev_chars(struct dasd_device *, char *, void *, int);
char *dasd_get_sense(struct irb *);
......
drivers/s390/block/dcssblk.c
View file @ 6a454f71
......@@ -14,10 +14,11 @@
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/blkdev.h>
#include <asm/extmem.h>
#include <asm/io.h>
#include <linux/completion.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <asm/extmem.h>
#include <asm/io.h>
#define DCSSBLK_NAME "dcssblk"
#define DCSSBLK_MINORS_PER_DISK 1
......@@ -939,12 +940,95 @@ dcssblk_check_params(void)
}
}
/*
* Suspend / Resume
*/
static int dcssblk_freeze(struct device *dev)
{
struct dcssblk_dev_info *dev_info;
int rc = 0;
list_for_each_entry(dev_info, &dcssblk_devices, lh) {
switch (dev_info->segment_type) {
case SEG_TYPE_SR:
case SEG_TYPE_ER:
case SEG_TYPE_SC:
if (!dev_info->is_shared)
rc = -EINVAL;
break;
default:
rc = -EINVAL;
break;
}
if (rc)
break;
}
if (rc)
pr_err("Suspend failed because device %s is writeable.\n",
dev_info->segment_name);
return rc;
}
static int dcssblk_restore(struct device *dev)
{
struct dcssblk_dev_info *dev_info;
struct segment_info *entry;
unsigned long start, end;
int rc = 0;
list_for_each_entry(dev_info, &dcssblk_devices, lh) {
list_for_each_entry(entry, &dev_info->seg_list, lh) {
segment_unload(entry->segment_name);
rc = segment_load(entry->segment_name, SEGMENT_SHARED,
&start, &end);
if (rc < 0) {
// TODO in_use check ?
segment_warning(rc, entry->segment_name);
goto out_panic;
}
if (start != entry->start || end != entry->end) {
pr_err("Mismatch of start / end address after "
"resuming device %s\n",
entry->segment_name);
goto out_panic;
}
}
}
return 0;
out_panic:
panic("fatal dcssblk resume error\n");
}
static int dcssblk_thaw(struct device *dev)
{
return 0;
}
static struct dev_pm_ops dcssblk_pm_ops = {
.freeze = dcssblk_freeze,
.thaw = dcssblk_thaw,
.restore = dcssblk_restore,
};
static struct platform_driver dcssblk_pdrv = {
.driver = {
.name = "dcssblk",
.owner = THIS_MODULE,
.pm = &dcssblk_pm_ops,
},
};
static struct platform_device *dcssblk_pdev;
/*
* The init/exit functions.
*/
static void __exit
dcssblk_exit(void)
{
platform_device_unregister(dcssblk_pdev);
platform_driver_unregister(&dcssblk_pdrv);
root_device_unregister(dcssblk_root_dev);
unregister_blkdev(dcssblk_major, DCSSBLK_NAME);
}
......@@ -954,30 +1038,44 @@ dcssblk_init(void)
{
int rc;
dcssblk_root_dev = root_device_register("dcssblk");
if (IS_ERR(dcssblk_root_dev))
return PTR_ERR(dcssblk_root_dev);
rc = device_create_file(dcssblk_root_dev, &dev_attr_add);
if (rc) {
root_device_unregister(dcssblk_root_dev);
rc = platform_driver_register(&dcssblk_pdrv);
if (rc)
return rc;
dcssblk_pdev = platform_device_register_simple("dcssblk", -1, NULL,
0);
if (IS_ERR(dcssblk_pdev)) {
rc = PTR_ERR(dcssblk_pdev);
goto out_pdrv;
}
rc = device_create_file(dcssblk_root_dev, &dev_attr_remove);
if (rc) {
root_device_unregister(dcssblk_root_dev);
return rc;
dcssblk_root_dev = root_device_register("dcssblk");
if (IS_ERR(dcssblk_root_dev)) {
rc = PTR_ERR(dcssblk_root_dev);
goto out_pdev;
}
rc = device_create_file(dcssblk_root_dev, &dev_attr_add);
if (rc)
goto out_root;
rc = device_create_file(dcssblk_root_dev, &dev_attr_remove);
if (rc)
goto out_root;
rc = register_blkdev(0, DCSSBLK_NAME);
if (rc < 0) {
root_device_unregister(dcssblk_root_dev);
return rc;
}
if (rc < 0)
goto out_root;
dcssblk_major = rc;
init_rwsem(&dcssblk_devices_sem);
dcssblk_check_params();
return 0;
out_root:
root_device_unregister(dcssblk_root_dev);
out_pdev:
platform_device_unregister(dcssblk_pdev);
out_pdrv:
platform_driver_unregister(&dcssblk_pdrv);
return rc;
}
module_init(dcssblk_init);
......
drivers/s390/block/xpram.c
View file @ 6a454f71
......@@ -39,7 +39,10 @@
#include <linux/hdreg.h> /* HDIO_GETGEO */
#include <linux/sysdev.h>
#include <linux/bio.h>
#include <linux/suspend.h>
#include <linux/platform_device.h>
#include <asm/uaccess.h>
#include <asm/checksum.h>
#define XPRAM_NAME "xpram"
#define XPRAM_DEVS 1 /* one partition */
......@@ -48,6 +51,7 @@
typedef struct {
unsigned int size; /* size of xpram segment in pages */
unsigned int offset; /* start page of xpram segment */
unsigned int csum; /* partition checksum for suspend */
} xpram_device_t;
static xpram_device_t xpram_devices[XPRAM_MAX_DEVS];
......@@ -138,7 +142,7 @@ static long xpram_page_out (unsigned long page_addr, unsigned int xpage_index)
/*
* Check if xpram is available.
*/
static int __init xpram_present(void)
static int xpram_present(void)
{
unsigned long mem_page;
int rc;
......@@ -154,7 +158,7 @@ static int __init xpram_present(void)
/*
* Return index of the last available xpram page.
*/
static unsigned long __init xpram_highest_page_index(void)
static unsigned long xpram_highest_page_index(void)
{
unsigned int page_index, add_bit;
unsigned long mem_page;
......@@ -382,6 +386,106 @@ static int __init xpram_setup_blkdev(void)
return rc;
}
/*
* Save checksums for all partitions.
*/
static int xpram_save_checksums(void)
{
unsigned long mem_page;
int rc, i;
rc = 0;
mem_page = (unsigned long) __get_free_page(GFP_KERNEL);
if (!mem_page)
return -ENOMEM;
for (i = 0; i < xpram_devs; i++) {
rc = xpram_page_in(mem_page, xpram_devices[i].offset);
if (rc)
goto fail;
xpram_devices[i].csum = csum_partial((const void *) mem_page,
PAGE_SIZE, 0);
}
fail:
free_page(mem_page);
return rc ? -ENXIO : 0;
}
/*
* Verify checksums for all partitions.
*/
static int xpram_validate_checksums(void)
{
unsigned long mem_page;
unsigned int csum;
int rc, i;
rc = 0;
mem_page = (unsigned long) __get_free_page(GFP_KERNEL);
if (!mem_page)
return -ENOMEM;
for (i = 0; i < xpram_devs; i++) {
rc = xpram_page_in(mem_page, xpram_devices[i].offset);
if (rc)
goto fail;
csum = csum_partial((const void *) mem_page, PAGE_SIZE, 0);
if (xpram_devices[i].csum != csum) {
rc = -EINVAL;
goto fail;
}
}
fail:
free_page(mem_page);
return rc ? -ENXIO : 0;
}
/*
* Resume failed: Print error message and call panic.
*/
static void xpram_resume_error(const char *message)
{
pr_err("Resume error: %s\n", message);
panic("xpram resume error\n");
}
/*
* Check if xpram setup changed between suspend and resume.
*/
static int xpram_restore(struct device *dev)
{
if (!xpram_pages)
return 0;
if (xpram_present() != 0)
xpram_resume_error("xpram disappeared");
if (xpram_pages != xpram_highest_page_index() + 1)
xpram_resume_error("Size of xpram changed");
if (xpram_validate_checksums())
xpram_resume_error("Data of xpram changed");
return 0;
}
/*
* Save necessary state in suspend.
*/
static int xpram_freeze(struct device *dev)
{
return xpram_save_checksums();
}
static struct dev_pm_ops xpram_pm_ops = {
.freeze = xpram_freeze,
.restore = xpram_restore,
};
static struct platform_driver xpram_pdrv = {
.driver = {
.name = XPRAM_NAME,
.owner = THIS_MODULE,
.pm = &xpram_pm_ops,
},
};
static struct platform_device *xpram_pdev;
/*
* Finally, the init/exit functions.
*/
......@@ -394,6 +498,8 @@ static void __exit xpram_exit(void)
put_disk(xpram_disks[i]);
}
unregister_blkdev(XPRAM_MAJOR, XPRAM_NAME);
platform_device_unregister(xpram_pdev);
platform_driver_unregister(&xpram_pdrv);
}
static int __init xpram_init(void)
......@@ -411,7 +517,24 @@ static int __init xpram_init(void)
rc = xpram_setup_sizes(xpram_pages);
if (rc)
return rc;
return xpram_setup_blkdev();
rc = platform_driver_register(&xpram_pdrv);
if (rc)
return rc;
xpram_pdev = platform_device_register_simple(XPRAM_NAME, -1, NULL, 0);
if (IS_ERR(xpram_pdev)) {
rc = PTR_ERR(xpram_pdev);
goto fail_platform_driver_unregister;
}
rc = xpram_setup_blkdev();
if (rc)
goto fail_platform_device_unregister;
return 0;
fail_platform_device_unregister:
platform_device_unregister(xpram_pdev);
fail_platform_driver_unregister:
platform_driver_unregister(&xpram_pdrv);
return rc;
}
module_init(xpram_init);
......
drivers/s390/char/con3215.c
View file @ 6a454f71
This diff is collapsed.
drivers/s390/char/con3270.c
View file @ 6a454f71
/*
* drivers/s390/char/con3270.c
* IBM/3270 Driver - console view.
* IBM/3270 Driver - console view.
*
* Author(s):
* Original 3270 Code for 2.4 written by Richard Hitt (UTS Global)
* Rewritten for 2.5 by Martin Schwidefsky <schwidefsky@de.ibm.com>
* -- Copyright (C) 2003 IBM Deutschland Entwicklung GmbH, IBM Corporation
* Author(s):
* Original 3270 Code for 2.4 written by Richard Hitt (UTS Global)
* Rewritten for 2.5 by Martin Schwidefsky <schwidefsky@de.ibm.com>
* Copyright IBM Corp. 2003, 2009
*/
#include <linux/bootmem.h>
......@@ -530,6 +529,7 @@ con3270_flush(void)
cp = condev;
if (!cp->view.dev)
return;
raw3270_pm_unfreeze(&cp->view);
spin_lock_irqsave(&cp->view.lock, flags);
con3270_wait_write(cp);
cp->nr_up = 0;
......
drivers/s390/char/fs3270.c
View file @ 6a454f71
/*
* drivers/s390/char/fs3270.c
* IBM/3270 Driver - fullscreen driver.
* IBM/3270 Driver - fullscreen driver.
*
* Author(s):
* Original 3270 Code for 2.4 written by Richard Hitt (UTS Global)
* Rewritten for 2.5/2.6 by Martin Schwidefsky <schwidefsky@de.ibm.com>
* -- Copyright (C) 2003 IBM Deutschland Entwicklung GmbH, IBM Corporation
* Author(s):
* Original 3270 Code for 2.4 written by Richard Hitt (UTS Global)
* Rewritten for 2.5/2.6 by Martin Schwidefsky <schwidefsky@de.ibm.com>
* Copyright IBM Corp. 2003, 2009
*/
#include <linux/bootmem.h>
......@@ -399,6 +398,11 @@ fs3270_free_view(struct raw3270_view *view)
static void
fs3270_release(struct raw3270_view *view)
{
struct fs3270 *fp;
fp = (struct fs3270 *) view;
if (fp->fs_pid)
kill_pid(fp->fs_pid, SIGHUP, 1);
}
/* View to a 3270 device. Can be console, tty or fullscreen. */
......
drivers/s390/char/monreader.c
View file @ 6a454f71
/*
* drivers/s390/char/monreader.c
*
* Character device driver for reading z/VM *MONITOR service records.
*
* Copyright IBM Corp. 2004, 2008
* Author: Gerald Schaefer <gerald.schaefer@de.ibm.com>
* Copyright IBM Corp. 2004, 2009
*
* Author: Gerald Schaefer <gerald.schaefer@de.ibm.com>
*/
#define KMSG_COMPONENT "monreader"
......@@ -22,6 +21,7 @@
#include <linux/spinlock.h>
#include <linux/interrupt.h>
#include <linux/poll.h>
#include <linux/device.h>
#include <net/iucv/iucv.h>
#include <asm/uaccess.h>
#include <asm/ebcdic.h>
......@@ -78,6 +78,7 @@ static u8 user_data_sever[16] = {
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
};
static struct device *monreader_device;
/******************************************************************************
* helper functions *
......@@ -319,11 +320,12 @@ static int mon_open(struct inode *inode, struct file *filp)
goto out_path;
}
filp->private_data = monpriv;
monreader_device->driver_data = monpriv;
unlock_kernel();
return nonseekable_open(inode, filp);
out_path:
kfree(monpriv->path);
iucv_path_free(monpriv->path);
out_priv:
mon_free_mem(monpriv);
out_use:
......@@ -341,10 +343,13 @@ static int mon_close(struct inode *inode, struct file *filp)
/*
* Close IUCV connection and unregister
*/
rc = iucv_path_sever(monpriv->path, user_data_sever);
if (rc)
pr_warning("Disconnecting the z/VM *MONITOR system service "
"failed with rc=%i\n", rc);
if (monpriv->path) {
rc = iucv_path_sever(monpriv->path, user_data_sever);
if (rc)
pr_warning("Disconnecting the z/VM *MONITOR system "
"service failed with rc=%i\n", rc);
iucv_path_free(monpriv->path);
}
atomic_set(&monpriv->iucv_severed, 0);
atomic_set(&monpriv->iucv_connected, 0);
......@@ -452,6 +457,94 @@ static struct miscdevice mon_dev = {
.minor = MISC_DYNAMIC_MINOR,
};
/******************************************************************************
* suspend / resume *
*****************************************************************************/
static int monreader_freeze(struct device *dev)
{
struct mon_private *monpriv = dev->driver_data;
int rc;
if (!monpriv)
return 0;
if (monpriv->path) {
rc = iucv_path_sever(monpriv->path, user_data_sever);
if (rc)
pr_warning("Disconnecting the z/VM *MONITOR system "
"service failed with rc=%i\n", rc);
iucv_path_free(monpriv->path);
}
atomic_set(&monpriv->iucv_severed, 0);
atomic_set(&monpriv->iucv_connected, 0);
atomic_set(&monpriv->read_ready, 0);
atomic_set(&monpriv->msglim_count, 0);
monpriv->write_index = 0;
monpriv->read_index = 0;
monpriv->path = NULL;
return 0;
}
static int monreader_thaw(struct device *dev)
{
struct mon_private *monpriv = dev->driver_data;
int rc;
if (!monpriv)
return 0;
rc = -ENOMEM;
monpriv->path = iucv_path_alloc(MON_MSGLIM, IUCV_IPRMDATA, GFP_KERNEL);
if (!monpriv->path)
goto out;
rc = iucv_path_connect(monpriv->path, &monreader_iucv_handler,
MON_SERVICE, NULL, user_data_connect, monpriv);
if (rc) {
pr_err("Connecting to the z/VM *MONITOR system service "
"failed with rc=%i\n", rc);
goto out_path;
}
wait_event(mon_conn_wait_queue,
atomic_read(&monpriv->iucv_connected) ||
atomic_read(&monpriv->iucv_severed));
if (atomic_read(&monpriv->iucv_severed))
goto out_path;
return 0;
out_path:
rc = -EIO;
iucv_path_free(monpriv->path);
monpriv->path = NULL;
out:
atomic_set(&monpriv->iucv_severed, 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);
}
static struct dev_pm_ops monreader_pm_ops = {
.freeze = monreader_freeze,
.thaw = monreader_thaw,
.restore = monreader_restore,
};
static struct device_driver monreader_driver = {
.name = "monreader",
.bus = &iucv_bus,
.pm = &monreader_pm_ops,
};
/******************************************************************************
* module init/exit *
*****************************************************************************/
......@@ -475,16 +568,33 @@ static int __init mon_init(void)
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) {
kfree(monreader_device);
goto out_driver;
}
rc = segment_type(mon_dcss_name);
if (rc < 0) {
segment_warning(rc, mon_dcss_name);
goto out_iucv;
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_iucv;
goto out_device;
}
rc = segment_load(mon_dcss_name, SEGMENT_SHARED,
......@@ -492,7 +602,7 @@ static int __init mon_init(void)
if (rc < 0) {
segment_warning(rc, mon_dcss_name);
rc = -EINVAL;
goto out_iucv;
goto out_device;
}
dcss_mkname(mon_dcss_name, &user_data_connect[8]);
......@@ -503,6 +613,10 @@ static int __init mon_init(void)
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;
......@@ -512,6 +626,8 @@ static void __exit mon_exit(void)
{
segment_unload(mon_dcss_name);
WARN_ON(misc_deregister(&mon_dev) != 0);
device_unregister(monreader_device);
driver_unregister(&monreader_driver);
iucv_unregister(&monreader_iucv_handler, 1);
return;
}
......
drivers/s390/char/monwriter.c
View file @ 6a454f71
/*
* drivers/s390/char/monwriter.c
*
* Character device driver for writing z/VM *MONITOR service records.
*
* Copyright (C) IBM Corp. 2006
* Copyright IBM Corp. 2006, 2009
*
* Author(s): Melissa Howland <Melissa.Howland@us.ibm.com>
*/
......@@ -22,6 +20,7 @@
#include <linux/ctype.h>
#include <linux/poll.h>
#include <linux/mutex.h>
#include <linux/platform_device.h>
#include <asm/uaccess.h>
#include <asm/ebcdic.h>
#include <asm/io.h>
......@@ -40,7 +39,10 @@ struct mon_buf {
char *data;
};
static LIST_HEAD(mon_priv_list);
struct mon_private {
struct list_head priv_list;
struct list_head list;
struct monwrite_hdr hdr;
size_t hdr_to_read;
......@@ -188,6 +190,7 @@ static int monwrite_open(struct inode *inode, struct file *filp)
monpriv->hdr_to_read = sizeof(monpriv->hdr);
mutex_init(&monpriv->thread_mutex);
filp->private_data = monpriv;
list_add_tail(&monpriv->priv_list, &mon_priv_list);
unlock_kernel();
return nonseekable_open(inode, filp);
}
......@@ -206,6 +209,7 @@ static int monwrite_close(struct inode *inode, struct file *filp)
kfree(entry->data);
kfree(entry);
}
list_del(&monpriv->priv_list);
kfree(monpriv);
return 0;
}
......@@ -280,21 +284,103 @@ static struct miscdevice mon_dev = {
.minor = MISC_DYNAMIC_MINOR,
};
/*
* suspend/resume
*/
static int monwriter_freeze(struct device *dev)
{
struct mon_private *monpriv;
struct mon_buf *monbuf;
list_for_each_entry(monpriv, &mon_priv_list, priv_list) {
list_for_each_entry(monbuf, &monpriv->list, list) {
if (monbuf->hdr.mon_function != MONWRITE_GEN_EVENT)
monwrite_diag(&monbuf->hdr, monbuf->data,
APPLDATA_STOP_REC);
}
}
return 0;
}
static int monwriter_restore(struct device *dev)
{
struct mon_private *monpriv;
struct mon_buf *monbuf;
list_for_each_entry(monpriv, &mon_priv_list, priv_list) {
list_for_each_entry(monbuf, &monpriv->list, list) {
if (monbuf->hdr.mon_function == MONWRITE_START_INTERVAL)
monwrite_diag(&monbuf->hdr, monbuf->data,
APPLDATA_START_INTERVAL_REC);
if (monbuf->hdr.mon_function == MONWRITE_START_CONFIG)
monwrite_diag(&monbuf->hdr, monbuf->data,
APPLDATA_START_CONFIG_REC);
}
}
return 0;
}
static int monwriter_thaw(struct device *dev)
{
return monwriter_restore(dev);
}
static struct dev_pm_ops monwriter_pm_ops = {
.freeze = monwriter_freeze,
.thaw = monwriter_thaw,
.restore = monwriter_restore,
};
static struct platform_driver monwriter_pdrv = {
.driver = {
.name = "monwriter",
.owner = THIS_MODULE,
.pm = &monwriter_pm_ops,
},
};
static struct platform_device *monwriter_pdev;
/*
* module init/exit
*/
static int __init mon_init(void)
{
if (MACHINE_IS_VM)
return misc_register(&mon_dev);
else
int rc;
if (!MACHINE_IS_VM)
return -ENODEV;
rc = platform_driver_register(&monwriter_pdrv);
if (rc)
return rc;
monwriter_pdev = platform_device_register_simple("monwriter", -1, NULL,
0);
if (IS_ERR(monwriter_pdev)) {
rc = PTR_ERR(monwriter_pdev);
goto out_driver;
}
rc = misc_register(&mon_dev);
if (rc)
goto out_device;
return 0;
out_device:
platform_device_unregister(monwriter_pdev);
out_driver:
platform_driver_unregister(&monwriter_pdrv);
return rc;
}
static void __exit mon_exit(void)
{
WARN_ON(misc_deregister(&mon_dev) != 0);
platform_device_unregister(monwriter_pdev);
platform_driver_unregister(&monwriter_pdrv);
}
module_init(mon_init);
......
drivers/s390/char/raw3270.c
View file @ 6a454f71
/*
* drivers/s390/char/raw3270.c
* IBM/3270 Driver - core functions.
* IBM/3270 Driver - core functions.
*
* Author(s):
* Original 3270 Code for 2.4 written by Richard Hitt (UTS Global)
* Rewritten for 2.5 by Martin Schwidefsky <schwidefsky@de.ibm.com>
* -- Copyright (C) 2003 IBM Deutschland Entwicklung GmbH, IBM Corporation
* Author(s):
* Original 3270 Code for 2.4 written by Richard Hitt (UTS Global)
* Rewritten for 2.5 by Martin Schwidefsky <schwidefsky@de.ibm.com>
* Copyright IBM Corp. 2003, 2009
*/
#include <linux/bootmem.h>
......@@ -61,6 +60,7 @@ struct raw3270 {
#define RAW3270_FLAGS_ATTN 2 /* Device sent an ATTN interrupt */
#define RAW3270_FLAGS_READY 4 /* Device is useable by views */
#define RAW3270_FLAGS_CONSOLE 8 /* Device is the console. */
#define RAW3270_FLAGS_FROZEN 16 /* set if 3270 is frozen for suspend */
/* Semaphore to protect global data of raw3270 (devices, views, etc). */
static DEFINE_MUTEX(raw3270_mutex);
......@@ -306,7 +306,8 @@ raw3270_start(struct raw3270_view *view, struct raw3270_request *rq)
spin_lock_irqsave(get_ccwdev_lock(view->dev->cdev), flags);
rp = view->dev;
if (!rp || rp->view != view)
if (!rp || rp->view != view ||
test_bit(RAW3270_FLAGS_FROZEN, &rp->flags))
rc = -EACCES;
else if (!test_bit(RAW3270_FLAGS_READY, &rp->flags))
rc = -ENODEV;
......@@ -323,7 +324,8 @@ raw3270_start_locked(struct raw3270_view *view, struct raw3270_request *rq)
int rc;
rp = view->dev;
if (!rp || rp->view != view)
if (!rp || rp->view != view ||
test_bit(RAW3270_FLAGS_FROZEN, &rp->flags))
rc = -EACCES;
else if (!test_bit(RAW3270_FLAGS_READY, &rp->flags))
rc = -ENODEV;
......@@ -764,7 +766,8 @@ raw3270_reset(struct raw3270_view *view)
int rc;
rp = view->dev;
if (!rp || rp->view != view)
if (!rp || rp->view != view ||
test_bit(RAW3270_FLAGS_FROZEN, &rp->flags))
rc = -EACCES;
else if (!test_bit(RAW3270_FLAGS_READY, &rp->flags))
rc = -ENODEV;
......@@ -922,6 +925,8 @@ raw3270_activate_view(struct raw3270_view *view)
rc = 0;
else if (!test_bit(RAW3270_FLAGS_READY, &rp->flags))
rc = -ENODEV;
else if (test_bit(RAW3270_FLAGS_FROZEN, &rp->flags))
rc = -EACCES;
else {
oldview = NULL;
if (rp->view) {
......@@ -969,7 +974,8 @@ raw3270_deactivate_view(struct raw3270_view *view)
list_del_init(&view->list);
list_add_tail(&view->list, &rp->view_list);
/* Try to activate another view. */
if (test_bit(RAW3270_FLAGS_READY, &rp->flags)) {
if (test_bit(RAW3270_FLAGS_READY, &rp->flags) &&
!test_bit(RAW3270_FLAGS_FROZEN, &rp->flags)) {
list_for_each_entry(view, &rp->view_list, list) {
rp->view = view;
if (view->fn->activate(view) == 0)
......@@ -1068,7 +1074,8 @@ raw3270_del_view(struct raw3270_view *view)
rp->view = NULL;
}
list_del_init(&view->list);
if (!rp->view && test_bit(RAW3270_FLAGS_READY, &rp->flags)) {
if (!rp->view && test_bit(RAW3270_FLAGS_READY, &rp->flags) &&
!test_bit(RAW3270_FLAGS_FROZEN, &rp->flags)) {
/* Try to activate another view. */
list_for_each_entry(nv, &rp->view_list, list) {
if (nv->fn->activate(nv) == 0) {
......@@ -1337,6 +1344,58 @@ raw3270_set_offline (struct ccw_device *cdev)
return 0;
}
static int raw3270_pm_stop(struct ccw_device *cdev)
{
struct raw3270 *rp;
struct raw3270_view *view;
unsigned long flags;
rp = cdev->dev.driver_data;
if (!rp)
return 0;
spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags);
if (rp->view)
rp->view->fn->deactivate(rp->view);
if (!test_bit(RAW3270_FLAGS_CONSOLE, &rp->flags)) {
/*
* Release tty and fullscreen for all non-console
* devices.
*/
list_for_each_entry(view, &rp->view_list, list) {
if (view->fn->release)
view->fn->release(view);
}
}
set_bit(RAW3270_FLAGS_FROZEN, &rp->flags);
spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags);
return 0;
}
static int raw3270_pm_start(struct ccw_device *cdev)
{
struct raw3270 *rp;
unsigned long flags;
rp = cdev->dev.driver_data;
if (!rp)
return 0;
spin_lock_irqsave(get_ccwdev_lock(rp->cdev), flags);
clear_bit(RAW3270_FLAGS_FROZEN, &rp->flags);
if (rp->view)
rp->view->fn->activate(rp->view);
spin_unlock_irqrestore(get_ccwdev_lock(rp->cdev), flags);
return 0;
}
void raw3270_pm_unfreeze(struct raw3270_view *view)
{
struct raw3270 *rp;
rp = view->dev;
if (rp && test_bit(RAW3270_FLAGS_FROZEN, &rp->flags))
ccw_device_force_console();
}
static struct ccw_device_id raw3270_id[] = {
{ CCW_DEVICE(0x3270, 0) },
{ CCW_DEVICE(0x3271, 0) },
......@@ -1360,6 +1419,9 @@ static struct ccw_driver raw3270_ccw_driver = {
.remove = &raw3270_remove,
.set_online = &raw3270_set_online,
.set_offline = &raw3270_set_offline,
.freeze = &raw3270_pm_stop,
.thaw = &raw3270_pm_start,
.restore = &raw3270_pm_start,
};
static int
......
drivers/s390/char/raw3270.h
View file @ 6a454f71
/*
* drivers/s390/char/raw3270.h
* IBM/3270 Driver
* IBM/3270 Driver
*
* Author(s):
* Original 3270 Code for 2.4 written by Richard Hitt (UTS Global)
* Rewritten for 2.5 by Martin Schwidefsky <schwidefsky@de.ibm.com>
* -- Copyright (C) 2003 IBM Deutschland Entwicklung GmbH, IBM Corporation
* Author(s):
* Original 3270 Code for 2.4 written by Richard Hitt (UTS Global)
* Rewritten for 2.5 by Martin Schwidefsky <schwidefsky@de.ibm.com>
* Copyright IBM Corp. 2003, 2009
*/
#include <asm/idals.h>
......@@ -195,6 +194,7 @@ void raw3270_wait_cons_dev(struct raw3270 *);
/* Notifier for device addition/removal */
int raw3270_register_notifier(void (*notifier)(int, int));
void raw3270_unregister_notifier(void (*notifier)(int, int));
void raw3270_pm_unfreeze(struct raw3270_view *);
/*
* Little memory allocator for string objects.
......
drivers/s390/char/sclp.c
View file @ 6a454f71
/*
* drivers/s390/char/sclp.c
* core function to access sclp interface
* core function to access sclp interface
*
* S390 version
* Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
* Author(s): Martin Peschke <mpeschke@de.ibm.com>
* Martin Schwidefsky <schwidefsky@de.ibm.com>
* Copyright IBM Corp. 1999, 2009
*
* Author(s): Martin Peschke <mpeschke@de.ibm.com>
* Martin Schwidefsky <schwidefsky@de.ibm.com>
*/
#include <linux/module.h>
......@@ -16,6 +15,9 @@
#include <linux/reboot.h>
#include <linux/jiffies.h>
#include <linux/init.h>
#include <linux/suspend.h>
#include <linux/completion.h>
#include <linux/platform_device.h>
#include <asm/types.h>
#include <asm/s390_ext.h>
......@@ -47,6 +49,16 @@ static struct sclp_req sclp_init_req;
static char sclp_read_sccb[PAGE_SIZE] __attribute__((__aligned__(PAGE_SIZE)));
static char sclp_init_sccb[PAGE_SIZE] __attribute__((__aligned__(PAGE_SIZE)));
/* Suspend request */
static DECLARE_COMPLETION(sclp_request_queue_flushed);
static void sclp_suspend_req_cb(struct sclp_req *req, void *data)
{
complete(&sclp_request_queue_flushed);
}
static struct sclp_req sclp_suspend_req;
/* Timer for request retries. */
static struct timer_list sclp_request_timer;
......@@ -84,6 +96,12 @@ static volatile enum sclp_mask_state_t {
sclp_mask_state_initializing
} sclp_mask_state = sclp_mask_state_idle;
/* Internal state: is the driver suspended? */
static enum sclp_suspend_state_t {
sclp_suspend_state_running,
sclp_suspend_state_suspended,
} sclp_suspend_state = sclp_suspend_state_running;
/* Maximum retry counts */
#define SCLP_INIT_RETRY 3
#define SCLP_MASK_RETRY 3
......@@ -211,6 +229,8 @@ sclp_process_queue(void)
del_timer(&sclp_request_timer);
while (!list_empty(&sclp_req_queue)) {
req = list_entry(sclp_req_queue.next, struct sclp_req, list);
if (!req->sccb)
goto do_post;
rc = __sclp_start_request(req);
if (rc == 0)
break;
......@@ -222,6 +242,7 @@ sclp_process_queue(void)
sclp_request_timeout, 0);
break;
}
do_post:
/* Post-processing for aborted request */
list_del(&req->list);
if (req->callback) {
......@@ -233,6 +254,19 @@ sclp_process_queue(void)
spin_unlock_irqrestore(&sclp_lock, flags);
}
static int __sclp_can_add_request(struct sclp_req *req)
{
if (req == &sclp_suspend_req || req == &sclp_init_req)
return 1;
if (sclp_suspend_state != sclp_suspend_state_running)
return 0;
if (sclp_init_state != sclp_init_state_initialized)
return 0;
if (sclp_activation_state != sclp_activation_state_active)
return 0;
return 1;
}
/* Queue a new request. Return zero on success, non-zero otherwise. */
int
sclp_add_request(struct sclp_req *req)
......@@ -241,9 +275,7 @@ sclp_add_request(struct sclp_req *req)
int rc;
spin_lock_irqsave(&sclp_lock, flags);
if ((sclp_init_state != sclp_init_state_initialized ||
sclp_activation_state != sclp_activation_state_active) &&
req != &sclp_init_req) {
if (!__sclp_can_add_request(req)) {
spin_unlock_irqrestore(&sclp_lock, flags);
return -EIO;
}
......@@ -254,10 +286,16 @@ sclp_add_request(struct sclp_req *req)
/* Start if request is first in list */
if (sclp_running_state == sclp_running_state_idle &&
req->list.prev == &sclp_req_queue) {
if (!req->sccb) {
list_del(&req->list);
rc = -ENODATA;
goto out;
}
rc = __sclp_start_request(req);
if (rc)
list_del(&req->list);
}
out:
spin_unlock_irqrestore(&sclp_lock, flags);
return rc;
}
......@@ -560,6 +598,7 @@ sclp_register(struct sclp_register *reg)
/* Trigger initial state change callback */
reg->sclp_receive_mask = 0;
reg->sclp_send_mask = 0;
reg->pm_event_posted = 0;
list_add(&reg->list, &sclp_reg_list);
spin_unlock_irqrestore(&sclp_lock, flags);
rc = sclp_init_mask(1);
......@@ -880,20 +919,134 @@ static struct notifier_block sclp_reboot_notifier = {
.notifier_call = sclp_reboot_event
};
/*
* Suspend/resume SCLP notifier implementation
*/
static void sclp_pm_event(enum sclp_pm_event sclp_pm_event, int rollback)
{
struct sclp_register *reg;
unsigned long flags;
if (!rollback) {
spin_lock_irqsave(&sclp_lock, flags);
list_for_each_entry(reg, &sclp_reg_list, list)
reg->pm_event_posted = 0;
spin_unlock_irqrestore(&sclp_lock, flags);
}
do {
spin_lock_irqsave(&sclp_lock, flags);
list_for_each_entry(reg, &sclp_reg_list, list) {
if (rollback && reg->pm_event_posted)
goto found;
if (!rollback && !reg->pm_event_posted)
goto found;
}
spin_unlock_irqrestore(&sclp_lock, flags);
return;
found:
spin_unlock_irqrestore(&sclp_lock, flags);
if (reg->pm_event_fn)
reg->pm_event_fn(reg, sclp_pm_event);
reg->pm_event_posted = rollback ? 0 : 1;
} while (1);
}
/*
* Susend/resume callbacks for platform device
*/
static int sclp_freeze(struct device *dev)
{
unsigned long flags;
int rc;
sclp_pm_event(SCLP_PM_EVENT_FREEZE, 0);
spin_lock_irqsave(&sclp_lock, flags);
sclp_suspend_state = sclp_suspend_state_suspended;
spin_unlock_irqrestore(&sclp_lock, flags);
/* Init supend data */
memset(&sclp_suspend_req, 0, sizeof(sclp_suspend_req));
sclp_suspend_req.callback = sclp_suspend_req_cb;
sclp_suspend_req.status = SCLP_REQ_FILLED;
init_completion(&sclp_request_queue_flushed);
rc = sclp_add_request(&sclp_suspend_req);
if (rc == 0)
wait_for_completion(&sclp_request_queue_flushed);
else if (rc != -ENODATA)
goto fail_thaw;
rc = sclp_deactivate();
if (rc)
goto fail_thaw;
return 0;
fail_thaw:
spin_lock_irqsave(&sclp_lock, flags);
sclp_suspend_state = sclp_suspend_state_running;
spin_unlock_irqrestore(&sclp_lock, flags);
sclp_pm_event(SCLP_PM_EVENT_THAW, 1);
return rc;
}
static int sclp_undo_suspend(enum sclp_pm_event event)
{
unsigned long flags;
int rc;
rc = sclp_reactivate();
if (rc)
return rc;
spin_lock_irqsave(&sclp_lock, flags);
sclp_suspend_state = sclp_suspend_state_running;
spin_unlock_irqrestore(&sclp_lock, flags);
sclp_pm_event(event, 0);
return 0;
}
static int sclp_thaw(struct device *dev)
{
return sclp_undo_suspend(SCLP_PM_EVENT_THAW);
}
static int sclp_restore(struct device *dev)
{
return sclp_undo_suspend(SCLP_PM_EVENT_RESTORE);
}
static struct dev_pm_ops sclp_pm_ops = {
.freeze = sclp_freeze,
.thaw = sclp_thaw,
.restore = sclp_restore,
};
static struct platform_driver sclp_pdrv = {
.driver = {
.name = "sclp",
.owner = THIS_MODULE,
.pm = &sclp_pm_ops,
},
};
static struct platform_device *sclp_pdev;
/* Initialize SCLP driver. Return zero if driver is operational, non-zero
* otherwise. */
static int
sclp_init(void)
{
unsigned long flags;
int rc;
int rc = 0;
spin_lock_irqsave(&sclp_lock, flags);
/* Check for previous or running initialization */
if (sclp_init_state != sclp_init_state_uninitialized) {
spin_unlock_irqrestore(&sclp_lock, flags);
return 0;
}
if (sclp_init_state != sclp_init_state_uninitialized)
goto fail_unlock;
sclp_init_state = sclp_init_state_initializing;
/* Set up variables */
INIT_LIST_HEAD(&sclp_req_queue);
......@@ -904,27 +1057,17 @@ sclp_init(void)
spin_unlock_irqrestore(&sclp_lock, flags);
rc = sclp_check_interface();
spin_lock_irqsave(&sclp_lock, flags);
if (rc) {
sclp_init_state = sclp_init_state_uninitialized;
spin_unlock_irqrestore(&sclp_lock, flags);
return rc;
}
if (rc)
goto fail_init_state_uninitialized;
/* Register reboot handler */
rc = register_reboot_notifier(&sclp_reboot_notifier);
if (rc) {
sclp_init_state = sclp_init_state_uninitialized;
spin_unlock_irqrestore(&sclp_lock, flags);
return rc;
}
if (rc)
goto fail_init_state_uninitialized;
/* Register interrupt handler */
rc = register_early_external_interrupt(0x2401, sclp_interrupt_handler,
&ext_int_info_hwc);
if (rc) {
unregister_reboot_notifier(&sclp_reboot_notifier);
sclp_init_state = sclp_init_state_uninitialized;
spin_unlock_irqrestore(&sclp_lock, flags);
return rc;
}
if (rc)
goto fail_unregister_reboot_notifier;
sclp_init_state = sclp_init_state_initialized;
spin_unlock_irqrestore(&sclp_lock, flags);
/* Enable service-signal external interruption - needs to happen with
......@@ -932,11 +1075,56 @@ sclp_init(void)
ctl_set_bit(0, 9);
sclp_init_mask(1);
return 0;
fail_unregister_reboot_notifier:
unregister_reboot_notifier(&sclp_reboot_notifier);
fail_init_state_uninitialized:
sclp_init_state = sclp_init_state_uninitialized;
fail_unlock:
spin_unlock_irqrestore(&sclp_lock, flags);
return rc;
}
/*
* SCLP panic notifier: If we are suspended, we thaw SCLP in order to be able
* to print the panic message.
*/
static int sclp_panic_notify(struct notifier_block *self,
unsigned long event, void *data)
{
if (sclp_suspend_state == sclp_suspend_state_suspended)
sclp_undo_suspend(SCLP_PM_EVENT_THAW);
return NOTIFY_OK;
}
static struct notifier_block sclp_on_panic_nb = {
.notifier_call = sclp_panic_notify,
.priority = SCLP_PANIC_PRIO,
};
static __init int sclp_initcall(void)
{
int rc;
rc = platform_driver_register(&sclp_pdrv);
if (rc)
return rc;
sclp_pdev = platform_device_register_simple("sclp", -1, NULL, 0);
rc = IS_ERR(sclp_pdev) ? PTR_ERR(sclp_pdev) : 0;
if (rc)
goto fail_platform_driver_unregister;
rc = atomic_notifier_chain_register(&panic_notifier_list,
&sclp_on_panic_nb);
if (rc)
goto fail_platform_device_unregister;
return sclp_init();
fail_platform_device_unregister:
platform_device_unregister(sclp_pdev);
fail_platform_driver_unregister:
platform_driver_unregister(&sclp_pdrv);
return rc;
}
arch_initcall(sclp_initcall);
drivers/s390/char/sclp.h
View file @ 6a454f71
/*
* drivers/s390/char/sclp.h
* Copyright IBM Corp. 1999, 2009
*
* S390 version
* Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
* Author(s): Martin Peschke <mpeschke@de.ibm.com>
* Martin Schwidefsky <schwidefsky@de.ibm.com>
* Author(s): Martin Peschke <mpeschke@de.ibm.com>
* Martin Schwidefsky <schwidefsky@de.ibm.com>
*/
#ifndef __SCLP_H__
......@@ -17,7 +15,7 @@
/* maximum number of pages concerning our own memory management */
#define MAX_KMEM_PAGES (sizeof(unsigned long) << 3)
#define MAX_CONSOLE_PAGES 4
#define MAX_CONSOLE_PAGES 6
#define EVTYP_OPCMD 0x01
#define EVTYP_MSG 0x02
......@@ -68,6 +66,15 @@ typedef unsigned int sclp_cmdw_t;
#define GDS_KEY_SELFDEFTEXTMSG 0x31
enum sclp_pm_event {
SCLP_PM_EVENT_FREEZE,
SCLP_PM_EVENT_THAW,
SCLP_PM_EVENT_RESTORE,
};
#define SCLP_PANIC_PRIO 1
#define SCLP_PANIC_PRIO_CLIENT 0
typedef u32 sccb_mask_t; /* ATTENTION: assumes 32bit mask !!! */
struct sccb_header {
......@@ -134,6 +141,10 @@ struct sclp_register {
void (*state_change_fn)(struct sclp_register *);
/* called for events in cp_receive_mask/sclp_receive_mask */
void (*receiver_fn)(struct evbuf_header *);
/* called for power management events */
void (*pm_event_fn)(struct sclp_register *, enum sclp_pm_event);
/* pm event posted flag */
int pm_event_posted;
};
/* externals from sclp.c */
......
drivers/s390/char/sclp_cmd.c
View file @ 6a454f71
/*
* drivers/s390/char/sclp_cmd.c
* Copyright IBM Corp. 2007, 2009
*
* Copyright IBM Corp. 2007
* Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>,
* Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
* Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>,
* Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
*/
#define KMSG_COMPONENT "sclp_cmd"
......@@ -12,11 +11,13 @@
#include <linux/completion.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/err.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/mmzone.h>
#include <linux/memory.h>
#include <linux/platform_device.h>
#include <asm/chpid.h>
#include <asm/sclp.h>
#include <asm/setup.h>
......@@ -292,6 +293,7 @@ static DEFINE_MUTEX(sclp_mem_mutex);
static LIST_HEAD(sclp_mem_list);
static u8 sclp_max_storage_id;
static unsigned long sclp_storage_ids[256 / BITS_PER_LONG];
static int sclp_mem_state_changed;
struct memory_increment {
struct list_head list;
......@@ -450,6 +452,8 @@ static int sclp_mem_notifier(struct notifier_block *nb,
rc = -EINVAL;
break;
}
if (!rc)
sclp_mem_state_changed = 1;
mutex_unlock(&sclp_mem_mutex);
return rc ? NOTIFY_BAD : NOTIFY_OK;
}
......@@ -525,6 +529,14 @@ static void __init insert_increment(u16 rn, int standby, int assigned)
list_add(&new_incr->list, prev);
}
static int sclp_mem_freeze(struct device *dev)
{
if (!sclp_mem_state_changed)
return 0;
pr_err("Memory hotplug state changed, suspend refused.\n");
return -EPERM;
}
struct read_storage_sccb {
struct sccb_header header;
u16 max_id;
......@@ -534,8 +546,20 @@ struct read_storage_sccb {
u32 entries[0];
} __packed;
static struct dev_pm_ops sclp_mem_pm_ops = {
.freeze = sclp_mem_freeze,
};
static struct platform_driver sclp_mem_pdrv = {
.driver = {
.name = "sclp_mem",
.pm = &sclp_mem_pm_ops,
},
};
static int __init sclp_detect_standby_memory(void)
{
struct platform_device *sclp_pdev;
struct read_storage_sccb *sccb;
int i, id, assigned, rc;
......@@ -588,7 +612,17 @@ static int __init sclp_detect_standby_memory(void)
rc = register_memory_notifier(&sclp_mem_nb);
if (rc)
goto out;
rc = platform_driver_register(&sclp_mem_pdrv);
if (rc)
goto out;
sclp_pdev = platform_device_register_simple("sclp_mem", -1, NULL, 0);
rc = IS_ERR(sclp_pdev) ? PTR_ERR(sclp_pdev) : 0;
if (rc)
goto out_driver;
sclp_add_standby_memory();
goto out;
out_driver:
platform_driver_unregister(&sclp_mem_pdrv);
out:
free_page((unsigned long) sccb);
return rc;
......
drivers/s390/char/sclp_con.c
View file @ 6a454f71
/*
* drivers/s390/char/sclp_con.c
* SCLP line mode console driver
* SCLP line mode console driver
*
* S390 version
* Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
* Author(s): Martin Peschke <mpeschke@de.ibm.com>
* Martin Schwidefsky <schwidefsky@de.ibm.com>
* Copyright IBM Corp. 1999, 2009
* Author(s): Martin Peschke <mpeschke@de.ibm.com>
* Martin Schwidefsky <schwidefsky@de.ibm.com>
*/
#include <linux/kmod.h>
......@@ -32,13 +30,14 @@ static spinlock_t sclp_con_lock;
static struct list_head sclp_con_pages;
/* List of full struct sclp_buffer structures ready for output */
static struct list_head sclp_con_outqueue;
/* Counter how many buffers are emitted (max 1) and how many */
/* are on the output queue. */
static int sclp_con_buffer_count;
/* Pointer to current console buffer */
static struct sclp_buffer *sclp_conbuf;
/* Timer for delayed output of console messages */
static struct timer_list sclp_con_timer;
/* Suspend mode flag */
static int sclp_con_suspended;
/* Flag that output queue is currently running */
static int sclp_con_queue_running;
/* Output format for console messages */
static unsigned short sclp_con_columns;
......@@ -53,42 +52,71 @@ sclp_conbuf_callback(struct sclp_buffer *buffer, int rc)
do {
page = sclp_unmake_buffer(buffer);
spin_lock_irqsave(&sclp_con_lock, flags);
/* Remove buffer from outqueue */
list_del(&buffer->list);
sclp_con_buffer_count--;
list_add_tail((struct list_head *) page, &sclp_con_pages);
/* Check if there is a pending buffer on the out queue. */
buffer = NULL;
if (!list_empty(&sclp_con_outqueue))
buffer = list_entry(sclp_con_outqueue.next,
struct sclp_buffer, list);
buffer = list_first_entry(&sclp_con_outqueue,
struct sclp_buffer, list);
if (!buffer || sclp_con_suspended) {
sclp_con_queue_running = 0;
spin_unlock_irqrestore(&sclp_con_lock, flags);
break;
}
spin_unlock_irqrestore(&sclp_con_lock, flags);
} while (buffer && sclp_emit_buffer(buffer, sclp_conbuf_callback));
} while (sclp_emit_buffer(buffer, sclp_conbuf_callback));
}
static void
sclp_conbuf_emit(void)
/*
* Finalize and emit first pending buffer.
*/
static void sclp_conbuf_emit(void)
{
struct sclp_buffer* buffer;
unsigned long flags;
int count;
int rc;
spin_lock_irqsave(&sclp_con_lock, flags);
buffer = sclp_conbuf;
if (sclp_conbuf)
list_add_tail(&sclp_conbuf->list, &sclp_con_outqueue);
sclp_conbuf = NULL;
if (buffer == NULL) {
spin_unlock_irqrestore(&sclp_con_lock, flags);
return;
}
list_add_tail(&buffer->list, &sclp_con_outqueue);
count = sclp_con_buffer_count++;
if (sclp_con_queue_running || sclp_con_suspended)
goto out_unlock;
if (list_empty(&sclp_con_outqueue))
goto out_unlock;
buffer = list_first_entry(&sclp_con_outqueue, struct sclp_buffer,
list);
sclp_con_queue_running = 1;
spin_unlock_irqrestore(&sclp_con_lock, flags);
if (count)
return;
rc = sclp_emit_buffer(buffer, sclp_conbuf_callback);
if (rc)
sclp_conbuf_callback(buffer, rc);
return;
out_unlock:
spin_unlock_irqrestore(&sclp_con_lock, flags);
}
/*
* Wait until out queue is empty
*/
static void sclp_console_sync_queue(void)
{
unsigned long flags;
spin_lock_irqsave(&sclp_con_lock, flags);
if (timer_pending(&sclp_con_timer))
del_timer_sync(&sclp_con_timer);
while (sclp_con_queue_running) {
spin_unlock_irqrestore(&sclp_con_lock, flags);
sclp_sync_wait();
spin_lock_irqsave(&sclp_con_lock, flags);
}
spin_unlock_irqrestore(&sclp_con_lock, flags);
}
/*
......@@ -123,6 +151,8 @@ sclp_console_write(struct console *console, const char *message,
/* make sure we have a console output buffer */
if (sclp_conbuf == NULL) {
while (list_empty(&sclp_con_pages)) {
if (sclp_con_suspended)
goto out;
spin_unlock_irqrestore(&sclp_con_lock, flags);
sclp_sync_wait();
spin_lock_irqsave(&sclp_con_lock, flags);
......@@ -157,6 +187,7 @@ sclp_console_write(struct console *console, const char *message,
sclp_con_timer.expires = jiffies + HZ/10;
add_timer(&sclp_con_timer);
}
out:
spin_unlock_irqrestore(&sclp_con_lock, flags);
}
......@@ -168,30 +199,43 @@ sclp_console_device(struct console *c, int *index)
}
/*
* This routine is called from panic when the kernel
* is going to give up. We have to make sure that all buffers
* will be flushed to the SCLP.
* Make sure that all buffers will be flushed to the SCLP.
*/
static void
sclp_console_flush(void)
{
sclp_conbuf_emit();
sclp_console_sync_queue();
}
/*
* Resume console: If there are cached messages, emit them.
*/
static void sclp_console_resume(void)
{
unsigned long flags;
spin_lock_irqsave(&sclp_con_lock, flags);
sclp_con_suspended = 0;
spin_unlock_irqrestore(&sclp_con_lock, flags);
sclp_conbuf_emit();
}
/*
* Suspend console: Set suspend flag and flush console
*/
static void sclp_console_suspend(void)
{
unsigned long flags;
spin_lock_irqsave(&sclp_con_lock, flags);
if (timer_pending(&sclp_con_timer))
del_timer(&sclp_con_timer);
while (sclp_con_buffer_count > 0) {
spin_unlock_irqrestore(&sclp_con_lock, flags);
sclp_sync_wait();
spin_lock_irqsave(&sclp_con_lock, flags);
}
sclp_con_suspended = 1;
spin_unlock_irqrestore(&sclp_con_lock, flags);
sclp_console_flush();
}
static int
sclp_console_notify(struct notifier_block *self,
unsigned long event, void *data)
static int sclp_console_notify(struct notifier_block *self,
unsigned long event, void *data)
{
sclp_console_flush();
return NOTIFY_OK;
......@@ -199,7 +243,7 @@ sclp_console_notify(struct notifier_block *self,
static struct notifier_block on_panic_nb = {
.notifier_call = sclp_console_notify,
.priority = 1,
.priority = SCLP_PANIC_PRIO_CLIENT,
};
static struct notifier_block on_reboot_nb = {
......@@ -220,6 +264,22 @@ static struct console sclp_console =
.index = 0 /* ttyS0 */
};
/*
* This function is called for SCLP suspend and resume events.
*/
void sclp_console_pm_event(enum sclp_pm_event sclp_pm_event)
{
switch (sclp_pm_event) {
case SCLP_PM_EVENT_FREEZE:
sclp_console_suspend();
break;
case SCLP_PM_EVENT_RESTORE:
case SCLP_PM_EVENT_THAW:
sclp_console_resume();
break;
}
}
/*
* called by console_init() in drivers/char/tty_io.c at boot-time.
*/
......@@ -243,7 +303,6 @@ sclp_console_init(void)
}
INIT_LIST_HEAD(&sclp_con_outqueue);
spin_lock_init(&sclp_con_lock);
sclp_con_buffer_count = 0;
sclp_conbuf = NULL;
init_timer(&sclp_con_timer);
......
drivers/s390/char/sclp_rw.c
View file @ 6a454f71
/*
* drivers/s390/char/sclp_rw.c
* driver: reading from and writing to system console on S/390 via SCLP
* driver: reading from and writing to system console on S/390 via SCLP
*
* S390 version
* Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
* Author(s): Martin Peschke <mpeschke@de.ibm.com>
* Martin Schwidefsky <schwidefsky@de.ibm.com>
* Copyright IBM Corp. 1999, 2009
*
* Author(s): Martin Peschke <mpeschke@de.ibm.com>
* Martin Schwidefsky <schwidefsky@de.ibm.com>
*/
#include <linux/kmod.h>
......@@ -26,9 +25,16 @@
*/
#define MAX_SCCB_ROOM (PAGE_SIZE - sizeof(struct sclp_buffer))
static void sclp_rw_pm_event(struct sclp_register *reg,
enum sclp_pm_event sclp_pm_event)
{
sclp_console_pm_event(sclp_pm_event);
}
/* Event type structure for write message and write priority message */
static struct sclp_register sclp_rw_event = {
.send_mask = EVTYP_MSG_MASK | EVTYP_PMSGCMD_MASK
.send_mask = EVTYP_MSG_MASK | EVTYP_PMSGCMD_MASK,
.pm_event_fn = sclp_rw_pm_event,
};
/*
......
drivers/s390/char/sclp_rw.h
View file @ 6a454f71
/*
* drivers/s390/char/sclp_rw.h
* interface to the SCLP-read/write driver
* interface to the SCLP-read/write driver
*
* S390 version
* Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
* Author(s): Martin Peschke <mpeschke@de.ibm.com>
* Martin Schwidefsky <schwidefsky@de.ibm.com>
* Copyright IBM Corporation 1999, 2009
*
* Author(s): Martin Peschke <mpeschke@de.ibm.com>
* Martin Schwidefsky <schwidefsky@de.ibm.com>
*/
#ifndef __SCLP_RW_H__
......@@ -93,4 +92,5 @@ void sclp_set_columns(struct sclp_buffer *, unsigned short);
void sclp_set_htab(struct sclp_buffer *, unsigned short);
int sclp_chars_in_buffer(struct sclp_buffer *);
void sclp_console_pm_event(enum sclp_pm_event sclp_pm_event);
#endif /* __SCLP_RW_H__ */
drivers/s390/char/sclp_vt220.c
View file @ 6a454f71
/*
* drivers/s390/char/sclp_vt220.c
* SCLP VT220 terminal driver.
* SCLP VT220 terminal driver.
*
* S390 version
* Copyright IBM Corp. 2003,2008
* Author(s): Peter Oberparleiter <Peter.Oberparleiter@de.ibm.com>
* Copyright IBM Corp. 2003, 2009
*
* Author(s): Peter Oberparleiter <Peter.Oberparleiter@de.ibm.com>
*/
#include <linux/module.h>
......@@ -69,8 +68,11 @@ static struct list_head sclp_vt220_empty;
/* List of pending requests */
static struct list_head sclp_vt220_outqueue;
/* Number of requests in outqueue */
static int sclp_vt220_outqueue_count;
/* Suspend mode flag */
static int sclp_vt220_suspended;
/* Flag that output queue is currently running */
static int sclp_vt220_queue_running;
/* Timer used for delaying write requests to merge subsequent messages into
* a single buffer */
......@@ -92,6 +94,8 @@ static int __initdata sclp_vt220_init_count;
static int sclp_vt220_flush_later;
static void sclp_vt220_receiver_fn(struct evbuf_header *evbuf);
static void sclp_vt220_pm_event_fn(struct sclp_register *reg,
enum sclp_pm_event sclp_pm_event);
static int __sclp_vt220_emit(struct sclp_vt220_request *request);
static void sclp_vt220_emit_current(void);
......@@ -100,7 +104,8 @@ static struct sclp_register sclp_vt220_register = {
.send_mask = EVTYP_VT220MSG_MASK,
.receive_mask = EVTYP_VT220MSG_MASK,
.state_change_fn = NULL,
.receiver_fn = sclp_vt220_receiver_fn
.receiver_fn = sclp_vt220_receiver_fn,
.pm_event_fn = sclp_vt220_pm_event_fn,
};
......@@ -120,15 +125,19 @@ sclp_vt220_process_queue(struct sclp_vt220_request *request)
spin_lock_irqsave(&sclp_vt220_lock, flags);
/* Move request from outqueue to empty queue */
list_del(&request->list);
sclp_vt220_outqueue_count--;
list_add_tail((struct list_head *) page, &sclp_vt220_empty);
/* Check if there is a pending buffer on the out queue. */
request = NULL;
if (!list_empty(&sclp_vt220_outqueue))
request = list_entry(sclp_vt220_outqueue.next,
struct sclp_vt220_request, list);
if (!request || sclp_vt220_suspended) {
sclp_vt220_queue_running = 0;
spin_unlock_irqrestore(&sclp_vt220_lock, flags);
break;
}
spin_unlock_irqrestore(&sclp_vt220_lock, flags);
} while (request && __sclp_vt220_emit(request));
} while (__sclp_vt220_emit(request));
if (request == NULL && sclp_vt220_flush_later)
sclp_vt220_emit_current();
/* Check if the tty needs a wake up call */
......@@ -212,26 +221,7 @@ __sclp_vt220_emit(struct sclp_vt220_request *request)
}
/*
* Queue and emit given request.
*/
static void
sclp_vt220_emit(struct sclp_vt220_request *request)
{
unsigned long flags;
int count;
spin_lock_irqsave(&sclp_vt220_lock, flags);
list_add_tail(&request->list, &sclp_vt220_outqueue);
count = sclp_vt220_outqueue_count++;
spin_unlock_irqrestore(&sclp_vt220_lock, flags);
/* Emit only the first buffer immediately - callback takes care of
* the rest */
if (count == 0 && __sclp_vt220_emit(request))
sclp_vt220_process_queue(request);
}
/*
* Queue and emit current request. Return zero on success, non-zero otherwise.
* Queue and emit current request.
*/
static void
sclp_vt220_emit_current(void)
......@@ -241,22 +231,33 @@ sclp_vt220_emit_current(void)
struct sclp_vt220_sccb *sccb;
spin_lock_irqsave(&sclp_vt220_lock, flags);
request = NULL;
if (sclp_vt220_current_request != NULL) {
if (sclp_vt220_current_request) {
sccb = (struct sclp_vt220_sccb *)
sclp_vt220_current_request->sclp_req.sccb;
/* Only emit buffers with content */
if (sccb->header.length != sizeof(struct sclp_vt220_sccb)) {
request = sclp_vt220_current_request;
list_add_tail(&sclp_vt220_current_request->list,
&sclp_vt220_outqueue);
sclp_vt220_current_request = NULL;
if (timer_pending(&sclp_vt220_timer))
del_timer(&sclp_vt220_timer);
}
sclp_vt220_flush_later = 0;
}
if (sclp_vt220_queue_running || sclp_vt220_suspended)
goto out_unlock;
if (list_empty(&sclp_vt220_outqueue))
goto out_unlock;
request = list_first_entry(&sclp_vt220_outqueue,
struct sclp_vt220_request, list);
sclp_vt220_queue_running = 1;
spin_unlock_irqrestore(&sclp_vt220_lock, flags);
if (__sclp_vt220_emit(request))
sclp_vt220_process_queue(request);
return;
out_unlock:
spin_unlock_irqrestore(&sclp_vt220_lock, flags);
if (request != NULL)
sclp_vt220_emit(request);
}
#define SCLP_NORMAL_WRITE 0x00
......@@ -396,7 +397,7 @@ __sclp_vt220_write(const unsigned char *buf, int count, int do_schedule,
if (sclp_vt220_current_request == NULL) {
while (list_empty(&sclp_vt220_empty)) {
spin_unlock_irqrestore(&sclp_vt220_lock, flags);
if (may_fail)
if (may_fail || sclp_vt220_suspended)
goto out;
else
sclp_sync_wait();
......@@ -531,7 +532,7 @@ sclp_vt220_put_char(struct tty_struct *tty, unsigned char ch)
static void
sclp_vt220_flush_chars(struct tty_struct *tty)
{
if (sclp_vt220_outqueue_count == 0)
if (!sclp_vt220_queue_running)
sclp_vt220_emit_current();
else
sclp_vt220_flush_later = 1;
......@@ -635,7 +636,6 @@ static int __init __sclp_vt220_init(int num_pages)
init_timer(&sclp_vt220_timer);
sclp_vt220_current_request = NULL;
sclp_vt220_buffered_chars = 0;
sclp_vt220_outqueue_count = 0;
sclp_vt220_tty = NULL;
sclp_vt220_flush_later = 0;
......@@ -736,7 +736,7 @@ static void __sclp_vt220_flush_buffer(void)
spin_lock_irqsave(&sclp_vt220_lock, flags);
if (timer_pending(&sclp_vt220_timer))
del_timer(&sclp_vt220_timer);
while (sclp_vt220_outqueue_count > 0) {
while (sclp_vt220_queue_running) {
spin_unlock_irqrestore(&sclp_vt220_lock, flags);
sclp_sync_wait();
spin_lock_irqsave(&sclp_vt220_lock, flags);
......@@ -744,6 +744,46 @@ static void __sclp_vt220_flush_buffer(void)
spin_unlock_irqrestore(&sclp_vt220_lock, flags);
}
/*
* Resume console: If there are cached messages, emit them.
*/
static void sclp_vt220_resume(void)
{
unsigned long flags;
spin_lock_irqsave(&sclp_vt220_lock, flags);
sclp_vt220_suspended = 0;
spin_unlock_irqrestore(&sclp_vt220_lock, flags);
sclp_vt220_emit_current();
}
/*
* Suspend console: Set suspend flag and flush console
*/
static void sclp_vt220_suspend(void)
{
unsigned long flags;
spin_lock_irqsave(&sclp_vt220_lock, flags);
sclp_vt220_suspended = 1;
spin_unlock_irqrestore(&sclp_vt220_lock, flags);
__sclp_vt220_flush_buffer();
}
static void sclp_vt220_pm_event_fn(struct sclp_register *reg,
enum sclp_pm_event sclp_pm_event)
{
switch (sclp_pm_event) {
case SCLP_PM_EVENT_FREEZE:
sclp_vt220_suspend();
break;
case SCLP_PM_EVENT_RESTORE:
case SCLP_PM_EVENT_THAW:
sclp_vt220_resume();
break;
}
}
static int
sclp_vt220_notify(struct notifier_block *self,
unsigned long event, void *data)
......
drivers/s390/char/tape.h
View file @ 6a454f71
......@@ -3,7 +3,7 @@
* tape device driver for 3480/3490E/3590 tapes.
*
* S390 and zSeries version
* Copyright IBM Corp. 2001,2006
* Copyright IBM Corp. 2001, 2009
* Author(s): Carsten Otte <cotte@de.ibm.com>
* Tuan Ngo-Anh <ngoanh@de.ibm.com>
* Martin Schwidefsky <schwidefsky@de.ibm.com>
......@@ -286,6 +286,7 @@ extern void tape_state_set(struct tape_device *, enum tape_state);
extern int tape_generic_online(struct tape_device *, struct tape_discipline *);
extern int tape_generic_offline(struct ccw_device *);
extern int tape_generic_pm_suspend(struct ccw_device *);
/* Externals from tape_devmap.c */
extern int tape_generic_probe(struct ccw_device *);
......
drivers/s390/char/tape_34xx.c
View file @ 6a454f71
......@@ -2,7 +2,7 @@
* drivers/s390/char/tape_34xx.c
* tape device discipline for 3480/3490 tapes.
*
* Copyright (C) IBM Corp. 2001,2006
* Copyright IBM Corp. 2001, 2009
* Author(s): Carsten Otte <cotte@de.ibm.com>
* Tuan Ngo-Anh <ngoanh@de.ibm.com>
* Martin Schwidefsky <schwidefsky@de.ibm.com>
......@@ -1302,6 +1302,7 @@ static struct ccw_driver tape_34xx_driver = {
.remove = tape_generic_remove,
.set_online = tape_34xx_online,
.set_offline = tape_generic_offline,
.freeze = tape_generic_pm_suspend,
};
static int
......
drivers/s390/char/tape_3590.c
View file @ 6a454f71
......@@ -2,7 +2,7 @@
* drivers/s390/char/tape_3590.c
* tape device discipline for 3590 tapes.
*
* Copyright IBM Corp. 2001,2006
* Copyright IBM Corp. 2001, 2009
* Author(s): Stefan Bader <shbader@de.ibm.com>
* Michael Holzheu <holzheu@de.ibm.com>
* Martin Schwidefsky <schwidefsky@de.ibm.com>
......@@ -1715,6 +1715,7 @@ static struct ccw_driver tape_3590_driver = {
.remove = tape_generic_remove,
.set_offline = tape_generic_offline,
.set_online = tape_3590_online,
.freeze = tape_generic_pm_suspend,
};
/*
......
drivers/s390/char/tape_core.c
View file @ 6a454f71
......@@ -3,7 +3,7 @@
* basic function of the tape device driver
*
* S390 and zSeries version
* Copyright IBM Corp. 2001,2006
* Copyright IBM Corp. 2001, 2009
* Author(s): Carsten Otte <cotte@de.ibm.com>
* Michael Holzheu <holzheu@de.ibm.com>
* Tuan Ngo-Anh <ngoanh@de.ibm.com>
......@@ -379,6 +379,55 @@ tape_cleanup_device(struct tape_device *device)
tape_med_state_set(device, MS_UNKNOWN);
}
/*
* Suspend device.
*
* Called by the common I/O layer if the drive should be suspended on user
* request. We refuse to suspend if the device is loaded or in use for the
* following reason:
* While the Linux guest is suspended, it might be logged off which causes
* devices to be detached. Tape devices are automatically rewound and unloaded
* during DETACH processing (unless the tape device was attached with the
* NOASSIGN or MULTIUSER option). After rewind/unload, there is no way to
* resume the original state of the tape device, since we would need to
* manually re-load the cartridge which was active at suspend time.
*/
int tape_generic_pm_suspend(struct ccw_device *cdev)
{
struct tape_device *device;
device = cdev->dev.driver_data;
if (!device) {
return -ENODEV;
}
DBF_LH(3, "(%08x): tape_generic_pm_suspend(%p)\n",
device->cdev_id, device);
if (device->medium_state != MS_UNLOADED) {
pr_err("A cartridge is loaded in tape device %s, "
"refusing to suspend\n", dev_name(&cdev->dev));
return -EBUSY;
}
spin_lock_irq(get_ccwdev_lock(device->cdev));
switch (device->tape_state) {
case TS_INIT:
case TS_NOT_OPER:
case TS_UNUSED:
spin_unlock_irq(get_ccwdev_lock(device->cdev));
break;
default:
pr_err("Tape device %s is busy, refusing to "
"suspend\n", dev_name(&cdev->dev));
spin_unlock_irq(get_ccwdev_lock(device->cdev));
return -EBUSY;
}
DBF_LH(3, "(%08x): Drive suspended.\n", device->cdev_id);
return 0;
}
/*
* Set device offline.
*
......@@ -1273,6 +1322,7 @@ EXPORT_SYMBOL(tape_generic_remove);
EXPORT_SYMBOL(tape_generic_probe);
EXPORT_SYMBOL(tape_generic_online);
EXPORT_SYMBOL(tape_generic_offline);
EXPORT_SYMBOL(tape_generic_pm_suspend);
EXPORT_SYMBOL(tape_put_device);
EXPORT_SYMBOL(tape_get_device_reference);
EXPORT_SYMBOL(tape_state_verbose);
......
drivers/s390/char/vmlogrdr.c
View file @ 6a454f71
......@@ -3,7 +3,7 @@
* character device driver for reading z/VM system service records
*
*
* Copyright 2004 IBM Corporation
* Copyright IBM Corp. 2004, 2009
* character device driver for reading z/VM system service records,
* Version 1.0
* Author(s): Xenia Tkatschow <xenia@us.ibm.com>
......@@ -660,6 +660,29 @@ static struct attribute *vmlogrdr_attrs[] = {
NULL,
};
static int vmlogrdr_pm_prepare(struct device *dev)
{
int rc;
struct vmlogrdr_priv_t *priv = dev->driver_data;
rc = 0;
if (priv) {
spin_lock_bh(&priv->priv_lock);
if (priv->dev_in_use)
rc = -EBUSY;
spin_unlock_bh(&priv->priv_lock);
}
if (rc)
pr_err("vmlogrdr: device %s is busy. Refuse to suspend.\n",
dev_name(dev));
return rc;
}
static struct dev_pm_ops vmlogrdr_pm_ops = {
.prepare = vmlogrdr_pm_prepare,
};
static struct attribute_group vmlogrdr_attr_group = {
.attrs = vmlogrdr_attrs,
};
......@@ -668,6 +691,7 @@ static struct class *vmlogrdr_class;
static struct device_driver vmlogrdr_driver = {
.name = "vmlogrdr",
.bus = &iucv_bus,
.pm = &vmlogrdr_pm_ops,
};
......@@ -729,6 +753,7 @@ static int vmlogrdr_register_device(struct vmlogrdr_priv_t *priv)
dev->bus = &iucv_bus;
dev->parent = iucv_root;
dev->driver = &vmlogrdr_driver;
dev->driver_data = priv;
/*
* The release function could be called after the
* module has been unloaded. It's _only_ task is to
......
drivers/s390/char/vmur.c
View file @ 6a454f71
......@@ -2,7 +2,7 @@
* Linux driver for System z and s390 unit record devices
* (z/VM virtual punch, reader, printer)
*
* Copyright IBM Corp. 2001, 2007
* Copyright IBM Corp. 2001, 2009
* Authors: Malcolm Beattie <beattiem@uk.ibm.com>
* Michael Holzheu <holzheu@de.ibm.com>
* Frank Munzert <munzert@de.ibm.com>
......@@ -60,6 +60,7 @@ static int ur_probe(struct ccw_device *cdev);
static void ur_remove(struct ccw_device *cdev);
static int ur_set_online(struct ccw_device *cdev);
static int ur_set_offline(struct ccw_device *cdev);
static int ur_pm_suspend(struct ccw_device *cdev);
static struct ccw_driver ur_driver = {
.name = "vmur",
......@@ -69,6 +70,7 @@ static struct ccw_driver ur_driver = {
.remove = ur_remove,
.set_online = ur_set_online,
.set_offline = ur_set_offline,
.freeze = ur_pm_suspend,
};
static DEFINE_MUTEX(vmur_mutex);
......@@ -157,6 +159,28 @@ static void urdev_put(struct urdev *urd)
urdev_free(urd);
}
/*
* State and contents of ur devices can be changed by class D users issuing
* CP commands such as PURGE or TRANSFER, while the Linux guest is suspended.
* Also the Linux guest might be logged off, which causes all active spool
* files to be closed.
* So we cannot guarantee that spool files are still the same when the Linux
* guest is resumed. In order to avoid unpredictable results at resume time
* we simply refuse to suspend if a ur device node is open.
*/
static int ur_pm_suspend(struct ccw_device *cdev)
{
struct urdev *urd = cdev->dev.driver_data;
TRACE("ur_pm_suspend: cdev=%p\n", cdev);
if (urd->open_flag) {
pr_err("Unit record device %s is busy, %s refusing to "
"suspend.\n", dev_name(&cdev->dev), ur_banner);
return -EBUSY;
}
return 0;
}
/*
* Low-level functions to do I/O to a ur device.
* alloc_chan_prog
......
drivers/s390/char/vmwatchdog.c
View file @ 6a454f71
/*
* Watchdog implementation based on z/VM Watchdog Timer API
*
* Copyright IBM Corp. 2004,2009
*
* The user space watchdog daemon can use this driver as
* /dev/vmwatchdog to have z/VM execute the specified CP
* command when the timeout expires. The default command is
* "IPL", which which cause an immediate reboot.
*/
#define KMSG_COMPONENT "vmwatchdog"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include <linux/init.h>
#include <linux/fs.h>
#include <linux/kernel.h>
#include <linux/miscdevice.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/suspend.h>
#include <linux/watchdog.h>
#include <linux/smp_lock.h>
......@@ -43,6 +49,9 @@ static unsigned int vmwdt_interval = 60;
static unsigned long vmwdt_is_open;
static int vmwdt_expect_close;
#define VMWDT_OPEN 0 /* devnode is open or suspend in progress */
#define VMWDT_RUNNING 1 /* The watchdog is armed */
enum vmwdt_func {
/* function codes */
wdt_init = 0,
......@@ -92,6 +101,7 @@ static int vmwdt_keepalive(void)
EBC_TOUPPER(ebc_cmd, MAX_CMDLEN);
func = vmwdt_conceal ? (wdt_init | wdt_conceal) : wdt_init;
set_bit(VMWDT_RUNNING, &vmwdt_is_open);
ret = __diag288(func, vmwdt_interval, ebc_cmd, len);
WARN_ON(ret != 0);
kfree(ebc_cmd);
......@@ -102,6 +112,7 @@ static int vmwdt_disable(void)
{
int ret = __diag288(wdt_cancel, 0, "", 0);
WARN_ON(ret != 0);
clear_bit(VMWDT_RUNNING, &vmwdt_is_open);
return ret;
}
......@@ -123,13 +134,13 @@ static int vmwdt_open(struct inode *i, struct file *f)
{
int ret;
lock_kernel();
if (test_and_set_bit(0, &vmwdt_is_open)) {
if (test_and_set_bit(VMWDT_OPEN, &vmwdt_is_open)) {
unlock_kernel();
return -EBUSY;
}
ret = vmwdt_keepalive();
if (ret)
clear_bit(0, &vmwdt_is_open);
clear_bit(VMWDT_OPEN, &vmwdt_is_open);
unlock_kernel();
return ret ? ret : nonseekable_open(i, f);
}
......@@ -139,7 +150,7 @@ static int vmwdt_close(struct inode *i, struct file *f)
if (vmwdt_expect_close == 42)
vmwdt_disable();
vmwdt_expect_close = 0;
clear_bit(0, &vmwdt_is_open);
clear_bit(VMWDT_OPEN, &vmwdt_is_open);
return 0;
}
......@@ -223,6 +234,57 @@ static ssize_t vmwdt_write(struct file *f, const char __user *buf,
return count;
}
static int vmwdt_resume(void)
{
clear_bit(VMWDT_OPEN, &vmwdt_is_open);
return NOTIFY_DONE;
}
/*
* It makes no sense to go into suspend while the watchdog is running.
* Depending on the memory size, the watchdog might trigger, while we
* are still saving the memory.
* We reuse the open flag to ensure that suspend and watchdog open are
* exclusive operations
*/
static int vmwdt_suspend(void)
{
if (test_and_set_bit(VMWDT_OPEN, &vmwdt_is_open)) {
pr_err("The watchdog is in use. "
"This prevents hibernation or suspend.\n");
return NOTIFY_BAD;
}
if (test_bit(VMWDT_RUNNING, &vmwdt_is_open)) {
clear_bit(VMWDT_OPEN, &vmwdt_is_open);
pr_err("The watchdog is running. "
"This prevents hibernation or suspend.\n");
return NOTIFY_BAD;
}
return NOTIFY_DONE;
}
/*
* This function is called for suspend and resume.
*/
static int vmwdt_power_event(struct notifier_block *this, unsigned long event,
void *ptr)
{
switch (event) {
case PM_POST_HIBERNATION:
case PM_POST_SUSPEND:
return vmwdt_resume();
case PM_HIBERNATION_PREPARE:
case PM_SUSPEND_PREPARE:
return vmwdt_suspend();
default:
return NOTIFY_DONE;
}
}
static struct notifier_block vmwdt_power_notifier = {
.notifier_call = vmwdt_power_event,
};
static const struct file_operations vmwdt_fops = {
.open = &vmwdt_open,
.release = &vmwdt_close,
......@@ -244,12 +306,21 @@ static int __init vmwdt_init(void)
ret = vmwdt_probe();
if (ret)
return ret;
return misc_register(&vmwdt_dev);
ret = register_pm_notifier(&vmwdt_power_notifier);
if (ret)
return ret;
ret = misc_register(&vmwdt_dev);
if (ret) {
unregister_pm_notifier(&vmwdt_power_notifier);
return ret;
}
return 0;
}
module_init(vmwdt_init);
static void __exit vmwdt_exit(void)
{
WARN_ON(misc_deregister(&vmwdt_dev) != 0);
unregister_pm_notifier(&vmwdt_power_notifier);
misc_deregister(&vmwdt_dev);
}
module_exit(vmwdt_exit);
drivers/s390/cio/ccwgroup.c
View file @ 6a454f71
/*
* drivers/s390/cio/ccwgroup.c
* bus driver for ccwgroup
*
* Copyright (C) 2002 IBM Deutschland Entwicklung GmbH,
* IBM Corporation
* Author(s): Arnd Bergmann (arndb@de.ibm.com)
* Cornelia Huck (cornelia.huck@de.ibm.com)
* Copyright IBM Corp. 2002, 2009
*
* Author(s): Arnd Bergmann (arndb@de.ibm.com)
* Cornelia Huck (cornelia.huck@de.ibm.com)
*/
#include <linux/module.h>
#include <linux/errno.h>
......@@ -501,6 +500,74 @@ static void ccwgroup_shutdown(struct device *dev)
gdrv->shutdown(gdev);
}
static int ccwgroup_pm_prepare(struct device *dev)
{
struct ccwgroup_device *gdev = to_ccwgroupdev(dev);
struct ccwgroup_driver *gdrv = to_ccwgroupdrv(gdev->dev.driver);
/* Fail while device is being set online/offline. */
if (atomic_read(&gdev->onoff))
return -EAGAIN;
if (!gdev->dev.driver || gdev->state != CCWGROUP_ONLINE)
return 0;
return gdrv->prepare ? gdrv->prepare(gdev) : 0;
}
static void ccwgroup_pm_complete(struct device *dev)
{
struct ccwgroup_device *gdev = to_ccwgroupdev(dev);
struct ccwgroup_driver *gdrv = to_ccwgroupdrv(dev->driver);
if (!gdev->dev.driver || gdev->state != CCWGROUP_ONLINE)
return;
if (gdrv->complete)
gdrv->complete(gdev);
}
static int ccwgroup_pm_freeze(struct device *dev)
{
struct ccwgroup_device *gdev = to_ccwgroupdev(dev);
struct ccwgroup_driver *gdrv = to_ccwgroupdrv(gdev->dev.driver);
if (!gdev->dev.driver || gdev->state != CCWGROUP_ONLINE)
return 0;
return gdrv->freeze ? gdrv->freeze(gdev) : 0;
}
static int ccwgroup_pm_thaw(struct device *dev)
{
struct ccwgroup_device *gdev = to_ccwgroupdev(dev);
struct ccwgroup_driver *gdrv = to_ccwgroupdrv(gdev->dev.driver);
if (!gdev->dev.driver || gdev->state != CCWGROUP_ONLINE)
return 0;
return gdrv->thaw ? gdrv->thaw(gdev) : 0;
}
static int ccwgroup_pm_restore(struct device *dev)
{
struct ccwgroup_device *gdev = to_ccwgroupdev(dev);
struct ccwgroup_driver *gdrv = to_ccwgroupdrv(gdev->dev.driver);
if (!gdev->dev.driver || gdev->state != CCWGROUP_ONLINE)
return 0;
return gdrv->restore ? gdrv->restore(gdev) : 0;
}
static struct dev_pm_ops ccwgroup_pm_ops = {
.prepare = ccwgroup_pm_prepare,
.complete = ccwgroup_pm_complete,
.freeze = ccwgroup_pm_freeze,
.thaw = ccwgroup_pm_thaw,
.restore = ccwgroup_pm_restore,
};
static struct bus_type ccwgroup_bus_type = {
.name = "ccwgroup",
.match = ccwgroup_bus_match,
......@@ -508,6 +575,7 @@ static struct bus_type ccwgroup_bus_type = {
.probe = ccwgroup_probe,
.remove = ccwgroup_remove,
.shutdown = ccwgroup_shutdown,
.pm = &ccwgroup_pm_ops,
};
......
drivers/s390/cio/chsc.c
View file @ 6a454f71
......@@ -549,8 +549,7 @@ chsc_add_cmg_attr(struct channel_subsystem *css)
return ret;
}
static int
__chsc_do_secm(struct channel_subsystem *css, int enable, void *page)
int __chsc_do_secm(struct channel_subsystem *css, int enable, void *page)
{
struct {
struct chsc_header request;
......
drivers/s390/cio/chsc.h
View file @ 6a454f71
......@@ -90,6 +90,7 @@ extern void chsc_free_sei_area(void);
extern int chsc_enable_facility(int);
struct channel_subsystem;
extern int chsc_secm(struct channel_subsystem *, int);
int __chsc_do_secm(struct channel_subsystem *css, int enable, void *page);
int chsc_chp_vary(struct chp_id chpid, int on);
int chsc_determine_channel_path_desc(struct chp_id chpid, int fmt, int rfmt,
......
drivers/s390/cio/chsc_sch.c
View file @ 6a454f71
/*
* Driver for s390 chsc subchannels
*
* Copyright IBM Corp. 2008
* Copyright IBM Corp. 2008, 2009
*
* Author(s): Cornelia Huck <cornelia.huck@de.ibm.com>
*
*/
......@@ -112,6 +113,31 @@ static void chsc_subchannel_shutdown(struct subchannel *sch)
cio_disable_subchannel(sch);
}
static int chsc_subchannel_prepare(struct subchannel *sch)
{
int cc;
struct schib schib;
/*
* Don't allow suspend while the subchannel is not idle
* since we don't have a way to clear the subchannel and
* cannot disable it with a request running.
*/
cc = stsch(sch->schid, &schib);
if (!cc && scsw_stctl(&schib.scsw))
return -EAGAIN;
return 0;
}
static int chsc_subchannel_freeze(struct subchannel *sch)
{
return cio_disable_subchannel(sch);
}
static int chsc_subchannel_restore(struct subchannel *sch)
{
return cio_enable_subchannel(sch, (u32)(unsigned long)sch);
}
static struct css_device_id chsc_subchannel_ids[] = {
{ .match_flags = 0x1, .type =SUBCHANNEL_TYPE_CHSC, },
{ /* end of list */ },
......@@ -125,6 +151,10 @@ static struct css_driver chsc_subchannel_driver = {
.probe = chsc_subchannel_probe,
.remove = chsc_subchannel_remove,
.shutdown = chsc_subchannel_shutdown,
.prepare = chsc_subchannel_prepare,
.freeze = chsc_subchannel_freeze,
.thaw = chsc_subchannel_restore,
.restore = chsc_subchannel_restore,
.name = "chsc_subchannel",
};
......
drivers/s390/cio/cmf.c
View file @ 6a454f71
......@@ -1204,6 +1204,11 @@ static ssize_t cmb_enable_store(struct device *dev,
DEVICE_ATTR(cmb_enable, 0644, cmb_enable_show, cmb_enable_store);
int ccw_set_cmf(struct ccw_device *cdev, int enable)
{
return cmbops->set(cdev, enable ? 2 : 0);
}
/**
* enable_cmf() - switch on the channel measurement for a specific device
* @cdev: The ccw device to be enabled
......
drivers/s390/cio/css.c
View file @ 6a454f71
/*
* drivers/s390/cio/css.c
* driver for channel subsystem
* driver for channel subsystem
*
* Copyright IBM Corp. 2002,2008
* Author(s): Arnd Bergmann (arndb@de.ibm.com)
* Cornelia Huck (cornelia.huck@de.ibm.com)
* Copyright IBM Corp. 2002, 2009
*
* Author(s): Arnd Bergmann (arndb@de.ibm.com)
* Cornelia Huck (cornelia.huck@de.ibm.com)
*/
#define KMSG_COMPONENT "cio"
......@@ -17,6 +17,7 @@
#include <linux/errno.h>
#include <linux/list.h>
#include <linux/reboot.h>
#include <linux/suspend.h>
#include <asm/isc.h>
#include <asm/crw.h>
......@@ -779,6 +780,79 @@ static struct notifier_block css_reboot_notifier = {
.notifier_call = css_reboot_event,
};
/*
* Since the css devices are neither on a bus nor have a class
* nor have a special device type, we cannot stop/restart channel
* path measurements via the normal suspend/resume callbacks, but have
* to use notifiers.
*/
static int css_power_event(struct notifier_block *this, unsigned long event,
void *ptr)
{
void *secm_area;
int ret, i;
switch (event) {
case PM_HIBERNATION_PREPARE:
case PM_SUSPEND_PREPARE:
ret = NOTIFY_DONE;
for (i = 0; i <= __MAX_CSSID; i++) {
struct channel_subsystem *css;
css = channel_subsystems[i];
mutex_lock(&css->mutex);
if (!css->cm_enabled) {
mutex_unlock(&css->mutex);
continue;
}
secm_area = (void *)get_zeroed_page(GFP_KERNEL |
GFP_DMA);
if (secm_area) {
if (__chsc_do_secm(css, 0, secm_area))
ret = NOTIFY_BAD;
free_page((unsigned long)secm_area);
} else
ret = NOTIFY_BAD;
mutex_unlock(&css->mutex);
}
break;
case PM_POST_HIBERNATION:
case PM_POST_SUSPEND:
ret = NOTIFY_DONE;
for (i = 0; i <= __MAX_CSSID; i++) {
struct channel_subsystem *css;
css = channel_subsystems[i];
mutex_lock(&css->mutex);
if (!css->cm_enabled) {
mutex_unlock(&css->mutex);
continue;
}
secm_area = (void *)get_zeroed_page(GFP_KERNEL |
GFP_DMA);
if (secm_area) {
if (__chsc_do_secm(css, 1, secm_area))
ret = NOTIFY_BAD;
free_page((unsigned long)secm_area);
} else
ret = NOTIFY_BAD;
mutex_unlock(&css->mutex);
}
/* search for subchannels, which appeared during hibernation */
css_schedule_reprobe();
break;
default:
ret = NOTIFY_DONE;
}
return ret;
}
static struct notifier_block css_power_notifier = {
.notifier_call = css_power_event,
};
/*
* Now that the driver core is running, we can setup our channel subsystem.
* The struct subchannel's are created during probing (except for the
......@@ -852,6 +926,11 @@ init_channel_subsystem (void)
ret = register_reboot_notifier(&css_reboot_notifier);
if (ret)
goto out_unregister;
ret = register_pm_notifier(&css_power_notifier);
if (ret) {
unregister_reboot_notifier(&css_reboot_notifier);
goto out_unregister;
}
css_init_done = 1;
/* Enable default isc for I/O subchannels. */
......@@ -953,6 +1032,73 @@ static int css_uevent(struct device *dev, struct kobj_uevent_env *env)
return ret;
}
static int css_pm_prepare(struct device *dev)
{
struct subchannel *sch = to_subchannel(dev);
struct css_driver *drv;
if (mutex_is_locked(&sch->reg_mutex))
return -EAGAIN;
if (!sch->dev.driver)
return 0;
drv = to_cssdriver(sch->dev.driver);
/* Notify drivers that they may not register children. */
return drv->prepare ? drv->prepare(sch) : 0;
}
static void css_pm_complete(struct device *dev)
{
struct subchannel *sch = to_subchannel(dev);
struct css_driver *drv;
if (!sch->dev.driver)
return;
drv = to_cssdriver(sch->dev.driver);
if (drv->complete)
drv->complete(sch);
}
static int css_pm_freeze(struct device *dev)
{
struct subchannel *sch = to_subchannel(dev);
struct css_driver *drv;
if (!sch->dev.driver)
return 0;
drv = to_cssdriver(sch->dev.driver);
return drv->freeze ? drv->freeze(sch) : 0;
}
static int css_pm_thaw(struct device *dev)
{
struct subchannel *sch = to_subchannel(dev);
struct css_driver *drv;
if (!sch->dev.driver)
return 0;
drv = to_cssdriver(sch->dev.driver);
return drv->thaw ? drv->thaw(sch) : 0;
}
static int css_pm_restore(struct device *dev)
{
struct subchannel *sch = to_subchannel(dev);
struct css_driver *drv;
if (!sch->dev.driver)
return 0;
drv = to_cssdriver(sch->dev.driver);
return drv->restore ? drv->restore(sch) : 0;
}
static struct dev_pm_ops css_pm_ops = {
.prepare = css_pm_prepare,
.complete = css_pm_complete,
.freeze = css_pm_freeze,
.thaw = css_pm_thaw,
.restore = css_pm_restore,
};
struct bus_type css_bus_type = {
.name = "css",
.match = css_bus_match,
......@@ -960,6 +1106,7 @@ struct bus_type css_bus_type = {
.remove = css_remove,
.shutdown = css_shutdown,
.uevent = css_uevent,
.pm = &css_pm_ops,
};
/**
......
drivers/s390/cio/css.h
View file @ 6a454f71
......@@ -70,6 +70,11 @@ struct chp_link;
* @probe: function called on probe
* @remove: function called on remove
* @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
* @name: name of the device driver
*/
struct css_driver {
......@@ -82,6 +87,11 @@ struct css_driver {
int (*probe)(struct subchannel *);
int (*remove)(struct subchannel *);
void (*shutdown)(struct subchannel *);
int (*prepare) (struct subchannel *);
void (*complete) (struct subchannel *);
int (*freeze)(struct subchannel *);
int (*thaw) (struct subchannel *);
int (*restore)(struct subchannel *);
const char *name;
};
......
drivers/s390/cio/device.c
View file @ 6a454f71
......@@ -138,6 +138,19 @@ static struct css_device_id io_subchannel_ids[] = {
};
MODULE_DEVICE_TABLE(css, io_subchannel_ids);
static int io_subchannel_prepare(struct subchannel *sch)
{
struct ccw_device *cdev;
/*
* Don't allow suspend while a ccw device registration
* is still outstanding.
*/
cdev = sch_get_cdev(sch);
if (cdev && !device_is_registered(&cdev->dev))
return -EAGAIN;
return 0;
}
static struct css_driver io_subchannel_driver = {
.owner = THIS_MODULE,
.subchannel_type = io_subchannel_ids,
......@@ -148,6 +161,7 @@ static struct css_driver io_subchannel_driver = {
.probe = io_subchannel_probe,
.remove = io_subchannel_remove,
.shutdown = io_subchannel_shutdown,
.prepare = io_subchannel_prepare,
};
struct workqueue_struct *ccw_device_work;
......@@ -1775,6 +1789,15 @@ ccw_device_probe_console(void)
return &console_cdev;
}
static int ccw_device_pm_restore(struct device *dev);
int ccw_device_force_console(void)
{
if (!console_cdev_in_use)
return -ENODEV;
return ccw_device_pm_restore(&console_cdev.dev);
}
EXPORT_SYMBOL_GPL(ccw_device_force_console);
const char *cio_get_console_cdev_name(struct subchannel *sch)
{
......@@ -1895,6 +1918,242 @@ static void ccw_device_shutdown(struct device *dev)
disable_cmf(cdev);
}
static int ccw_device_pm_prepare(struct device *dev)
{
struct ccw_device *cdev = to_ccwdev(dev);
if (work_pending(&cdev->private->kick_work))
return -EAGAIN;
/* Fail while device is being set online/offline. */
if (atomic_read(&cdev->private->onoff))
return -EAGAIN;
if (cdev->online && cdev->drv && cdev->drv->prepare)
return cdev->drv->prepare(cdev);
return 0;
}
static void ccw_device_pm_complete(struct device *dev)
{
struct ccw_device *cdev = to_ccwdev(dev);
if (cdev->online && cdev->drv && cdev->drv->complete)
cdev->drv->complete(cdev);
}
static int ccw_device_pm_freeze(struct device *dev)
{
struct ccw_device *cdev = to_ccwdev(dev);
struct subchannel *sch = to_subchannel(cdev->dev.parent);
int ret, cm_enabled;
/* Fail suspend while device is in transistional state. */
if (!dev_fsm_final_state(cdev))
return -EAGAIN;
if (!cdev->online)
return 0;
if (cdev->drv && cdev->drv->freeze) {
ret = cdev->drv->freeze(cdev);
if (ret)
return ret;
}
spin_lock_irq(sch->lock);
cm_enabled = cdev->private->cmb != NULL;
spin_unlock_irq(sch->lock);
if (cm_enabled) {
/* Don't have the css write on memory. */
ret = ccw_set_cmf(cdev, 0);
if (ret)
return ret;
}
/* From here on, disallow device driver I/O. */
spin_lock_irq(sch->lock);
ret = cio_disable_subchannel(sch);
spin_unlock_irq(sch->lock);
return ret;
}
static int ccw_device_pm_thaw(struct device *dev)
{
struct ccw_device *cdev = to_ccwdev(dev);
struct subchannel *sch = to_subchannel(cdev->dev.parent);
int ret, cm_enabled;
if (!cdev->online)
return 0;
spin_lock_irq(sch->lock);
/* Allow device driver I/O again. */
ret = cio_enable_subchannel(sch, (u32)(addr_t)sch);
cm_enabled = cdev->private->cmb != NULL;
spin_unlock_irq(sch->lock);
if (ret)
return ret;
if (cm_enabled) {
ret = ccw_set_cmf(cdev, 1);
if (ret)
return ret;
}
if (cdev->drv && cdev->drv->thaw)
ret = cdev->drv->thaw(cdev);
return ret;
}
static void __ccw_device_pm_restore(struct ccw_device *cdev)
{
struct subchannel *sch = to_subchannel(cdev->dev.parent);
int ret;
if (cio_is_console(sch->schid))
goto out;
/*
* While we were sleeping, devices may have gone or become
* available again. Kick re-detection.
*/
spin_lock_irq(sch->lock);
cdev->private->flags.resuming = 1;
ret = ccw_device_recognition(cdev);
spin_unlock_irq(sch->lock);
if (ret) {
CIO_MSG_EVENT(0, "Couldn't start recognition for device "
"%s (ret=%d)\n", dev_name(&cdev->dev), ret);
spin_lock_irq(sch->lock);
cdev->private->state = DEV_STATE_DISCONNECTED;
spin_unlock_irq(sch->lock);
/* notify driver after the resume cb */
goto out;
}
wait_event(cdev->private->wait_q, dev_fsm_final_state(cdev) ||
cdev->private->state == DEV_STATE_DISCONNECTED);
out:
cdev->private->flags.resuming = 0;
}
static int resume_handle_boxed(struct ccw_device *cdev)
{
cdev->private->state = DEV_STATE_BOXED;
if (ccw_device_notify(cdev, CIO_BOXED))
return 0;
ccw_device_schedule_sch_unregister(cdev);
return -ENODEV;
}
static int resume_handle_disc(struct ccw_device *cdev)
{
cdev->private->state = DEV_STATE_DISCONNECTED;
if (ccw_device_notify(cdev, CIO_GONE))
return 0;
ccw_device_schedule_sch_unregister(cdev);
return -ENODEV;
}
static int ccw_device_pm_restore(struct device *dev)
{
struct ccw_device *cdev = to_ccwdev(dev);
struct subchannel *sch = to_subchannel(cdev->dev.parent);
int ret = 0, cm_enabled;
__ccw_device_pm_restore(cdev);
spin_lock_irq(sch->lock);
if (cio_is_console(sch->schid)) {
cio_enable_subchannel(sch, (u32)(addr_t)sch);
spin_unlock_irq(sch->lock);
goto out_restore;
}
cdev->private->flags.donotify = 0;
/* check recognition results */
switch (cdev->private->state) {
case DEV_STATE_OFFLINE:
break;
case DEV_STATE_BOXED:
ret = resume_handle_boxed(cdev);
spin_unlock_irq(sch->lock);
if (ret)
goto out;
goto out_restore;
case DEV_STATE_DISCONNECTED:
goto out_disc_unlock;
default:
goto out_unreg_unlock;
}
/* check if the device id has changed */
if (sch->schib.pmcw.dev != cdev->private->dev_id.devno) {
CIO_MSG_EVENT(0, "resume: sch %s: failed (devno changed from "
"%04x to %04x)\n", dev_name(&sch->dev),
cdev->private->dev_id.devno,
sch->schib.pmcw.dev);
goto out_unreg_unlock;
}
/* check if the device type has changed */
if (!ccw_device_test_sense_data(cdev)) {
ccw_device_update_sense_data(cdev);
PREPARE_WORK(&cdev->private->kick_work,
ccw_device_do_unbind_bind);
queue_work(ccw_device_work, &cdev->private->kick_work);
ret = -ENODEV;
goto out_unlock;
}
if (!cdev->online) {
ret = 0;
goto out_unlock;
}
ret = ccw_device_online(cdev);
if (ret)
goto out_disc_unlock;
cm_enabled = cdev->private->cmb != NULL;
spin_unlock_irq(sch->lock);
wait_event(cdev->private->wait_q, dev_fsm_final_state(cdev));
if (cdev->private->state != DEV_STATE_ONLINE) {
spin_lock_irq(sch->lock);
goto out_disc_unlock;
}
if (cm_enabled) {
ret = ccw_set_cmf(cdev, 1);
if (ret) {
CIO_MSG_EVENT(2, "resume: cdev %s: cmf failed "
"(rc=%d)\n", dev_name(&cdev->dev), ret);
ret = 0;
}
}
out_restore:
if (cdev->online && cdev->drv && cdev->drv->restore)
ret = cdev->drv->restore(cdev);
out:
return ret;
out_disc_unlock:
ret = resume_handle_disc(cdev);
spin_unlock_irq(sch->lock);
if (ret)
return ret;
goto out_restore;
out_unreg_unlock:
ccw_device_schedule_sch_unregister(cdev);
ret = -ENODEV;
out_unlock:
spin_unlock_irq(sch->lock);
return ret;
}
static struct dev_pm_ops ccw_pm_ops = {
.prepare = ccw_device_pm_prepare,
.complete = ccw_device_pm_complete,
.freeze = ccw_device_pm_freeze,
.thaw = ccw_device_pm_thaw,
.restore = ccw_device_pm_restore,
};
struct bus_type ccw_bus_type = {
.name = "ccw",
.match = ccw_bus_match,
......@@ -1902,6 +2161,7 @@ struct bus_type ccw_bus_type = {
.probe = ccw_device_probe,
.remove = ccw_device_remove,
.shutdown = ccw_device_shutdown,
.pm = &ccw_pm_ops,
};
/**
......
drivers/s390/cio/device.h
View file @ 6a454f71
......@@ -87,6 +87,8 @@ int ccw_device_is_orphan(struct ccw_device *);
int ccw_device_recognition(struct ccw_device *);
int ccw_device_online(struct ccw_device *);
int ccw_device_offline(struct ccw_device *);
void ccw_device_update_sense_data(struct ccw_device *);
int ccw_device_test_sense_data(struct ccw_device *);
void ccw_device_schedule_sch_unregister(struct ccw_device *);
int ccw_purge_blacklisted(void);
......@@ -133,5 +135,6 @@ extern struct bus_type ccw_bus_type;
void retry_set_schib(struct ccw_device *cdev);
void cmf_retry_copy_block(struct ccw_device *);
int cmf_reenable(struct ccw_device *);
int ccw_set_cmf(struct ccw_device *cdev, int enable);
extern struct device_attribute dev_attr_cmb_enable;
#endif
drivers/s390/cio/device_fsm.c
View file @ 6a454f71
......@@ -177,29 +177,21 @@ ccw_device_cancel_halt_clear(struct ccw_device *cdev)
panic("Can't stop i/o on subchannel.\n");
}
static int
ccw_device_handle_oper(struct ccw_device *cdev)
void ccw_device_update_sense_data(struct ccw_device *cdev)
{
struct subchannel *sch;
memset(&cdev->id, 0, sizeof(cdev->id));
cdev->id.cu_type = cdev->private->senseid.cu_type;
cdev->id.cu_model = cdev->private->senseid.cu_model;
cdev->id.dev_type = cdev->private->senseid.dev_type;
cdev->id.dev_model = cdev->private->senseid.dev_model;
}
sch = to_subchannel(cdev->dev.parent);
cdev->private->flags.recog_done = 1;
/*
* Check if cu type and device type still match. If
* not, it is certainly another device and we have to
* de- and re-register.
*/
if (cdev->id.cu_type != cdev->private->senseid.cu_type ||
cdev->id.cu_model != cdev->private->senseid.cu_model ||
cdev->id.dev_type != cdev->private->senseid.dev_type ||
cdev->id.dev_model != cdev->private->senseid.dev_model) {
PREPARE_WORK(&cdev->private->kick_work,
ccw_device_do_unbind_bind);
queue_work(ccw_device_work, &cdev->private->kick_work);
return 0;
}
cdev->private->flags.donotify = 1;
return 1;
int ccw_device_test_sense_data(struct ccw_device *cdev)
{
return cdev->id.cu_type == cdev->private->senseid.cu_type &&
cdev->id.cu_model == cdev->private->senseid.cu_model &&
cdev->id.dev_type == cdev->private->senseid.dev_type &&
cdev->id.dev_model == cdev->private->senseid.dev_model;
}
/*
......@@ -233,7 +225,7 @@ static void
ccw_device_recog_done(struct ccw_device *cdev, int state)
{
struct subchannel *sch;
int notify, old_lpm, same_dev;
int old_lpm;
sch = to_subchannel(cdev->dev.parent);
......@@ -263,8 +255,12 @@ ccw_device_recog_done(struct ccw_device *cdev, int state)
wake_up(&cdev->private->wait_q);
return;
}
notify = 0;
same_dev = 0; /* Keep the compiler quiet... */
if (cdev->private->flags.resuming) {
cdev->private->state = state;
cdev->private->flags.recog_done = 1;
wake_up(&cdev->private->wait_q);
return;
}
switch (state) {
case DEV_STATE_NOT_OPER:
CIO_MSG_EVENT(2, "SenseID : unknown device %04x on "
......@@ -273,34 +269,31 @@ ccw_device_recog_done(struct ccw_device *cdev, int state)
sch->schid.ssid, sch->schid.sch_no);
break;
case DEV_STATE_OFFLINE:
if (cdev->online) {
same_dev = ccw_device_handle_oper(cdev);
notify = 1;
if (!cdev->online) {
ccw_device_update_sense_data(cdev);
/* Issue device info message. */
CIO_MSG_EVENT(4, "SenseID : device 0.%x.%04x reports: "
"CU Type/Mod = %04X/%02X, Dev Type/Mod "
"= %04X/%02X\n",
cdev->private->dev_id.ssid,
cdev->private->dev_id.devno,
cdev->id.cu_type, cdev->id.cu_model,
cdev->id.dev_type, cdev->id.dev_model);
break;
}
/* fill out sense information */
memset(&cdev->id, 0, sizeof(cdev->id));
cdev->id.cu_type = cdev->private->senseid.cu_type;
cdev->id.cu_model = cdev->private->senseid.cu_model;
cdev->id.dev_type = cdev->private->senseid.dev_type;
cdev->id.dev_model = cdev->private->senseid.dev_model;
if (notify) {
cdev->private->state = DEV_STATE_OFFLINE;
if (same_dev) {
/* Get device online again. */
ccw_device_online(cdev);
wake_up(&cdev->private->wait_q);
}
return;
cdev->private->state = DEV_STATE_OFFLINE;
cdev->private->flags.recog_done = 1;
if (ccw_device_test_sense_data(cdev)) {
cdev->private->flags.donotify = 1;
ccw_device_online(cdev);
wake_up(&cdev->private->wait_q);
} else {
ccw_device_update_sense_data(cdev);
PREPARE_WORK(&cdev->private->kick_work,
ccw_device_do_unbind_bind);
queue_work(ccw_device_work, &cdev->private->kick_work);
}
/* Issue device info message. */
CIO_MSG_EVENT(4, "SenseID : device 0.%x.%04x reports: "
"CU Type/Mod = %04X/%02X, Dev Type/Mod = "
"%04X/%02X\n",
cdev->private->dev_id.ssid,
cdev->private->dev_id.devno,
cdev->id.cu_type, cdev->id.cu_model,
cdev->id.dev_type, cdev->id.dev_model);
break;
return;
case DEV_STATE_BOXED:
CIO_MSG_EVENT(0, "SenseID : boxed device %04x on "
" subchannel 0.%x.%04x\n",
......@@ -502,9 +495,6 @@ ccw_device_recognition(struct ccw_device *cdev)
struct subchannel *sch;
int ret;
if ((cdev->private->state != DEV_STATE_NOT_OPER) &&
(cdev->private->state != DEV_STATE_BOXED))
return -EINVAL;
sch = to_subchannel(cdev->dev.parent);
ret = cio_enable_subchannel(sch, (u32)(addr_t)sch);
if (ret != 0)
......
drivers/s390/cio/device_ops.c
View file @ 6a454f71
/*
* drivers/s390/cio/device_ops.c
* Copyright IBM Corp. 2002, 2009
*
* Copyright (C) 2002 IBM Deutschland Entwicklung GmbH,
* IBM Corporation
* Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com)
* Cornelia Huck (cornelia.huck@de.ibm.com)
* Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com)
* Cornelia Huck (cornelia.huck@de.ibm.com)
*/
#include <linux/module.h>
#include <linux/init.h>
......@@ -116,12 +114,15 @@ int ccw_device_clear(struct ccw_device *cdev, unsigned long intparm)
if (!cdev || !cdev->dev.parent)
return -ENODEV;
sch = to_subchannel(cdev->dev.parent);
if (!sch->schib.pmcw.ena)
return -EINVAL;
if (cdev->private->state == DEV_STATE_NOT_OPER)
return -ENODEV;
if (cdev->private->state != DEV_STATE_ONLINE &&
cdev->private->state != DEV_STATE_W4SENSE)
return -EINVAL;
sch = to_subchannel(cdev->dev.parent);
ret = cio_clear(sch);
if (ret == 0)
cdev->private->intparm = intparm;
......@@ -162,6 +163,8 @@ int ccw_device_start_key(struct ccw_device *cdev, struct ccw1 *cpa,
if (!cdev || !cdev->dev.parent)
return -ENODEV;
sch = to_subchannel(cdev->dev.parent);
if (!sch->schib.pmcw.ena)
return -EINVAL;
if (cdev->private->state == DEV_STATE_NOT_OPER)
return -ENODEV;
if (cdev->private->state == DEV_STATE_VERIFY ||
......@@ -337,12 +340,15 @@ int ccw_device_halt(struct ccw_device *cdev, unsigned long intparm)
if (!cdev || !cdev->dev.parent)
return -ENODEV;
sch = to_subchannel(cdev->dev.parent);
if (!sch->schib.pmcw.ena)
return -EINVAL;
if (cdev->private->state == DEV_STATE_NOT_OPER)
return -ENODEV;
if (cdev->private->state != DEV_STATE_ONLINE &&
cdev->private->state != DEV_STATE_W4SENSE)
return -EINVAL;
sch = to_subchannel(cdev->dev.parent);
ret = cio_halt(sch);
if (ret == 0)
cdev->private->intparm = intparm;
......@@ -369,6 +375,8 @@ int ccw_device_resume(struct ccw_device *cdev)
if (!cdev || !cdev->dev.parent)
return -ENODEV;
sch = to_subchannel(cdev->dev.parent);
if (!sch->schib.pmcw.ena)
return -EINVAL;
if (cdev->private->state == DEV_STATE_NOT_OPER)
return -ENODEV;
if (cdev->private->state != DEV_STATE_ONLINE ||
......@@ -580,6 +588,8 @@ int ccw_device_tm_start_key(struct ccw_device *cdev, struct tcw *tcw,
int rc;
sch = to_subchannel(cdev->dev.parent);
if (!sch->schib.pmcw.ena)
return -EINVAL;
if (cdev->private->state != DEV_STATE_ONLINE)
return -EIO;
/* Adjust requested path mask to excluded varied off paths. */
......@@ -669,6 +679,8 @@ int ccw_device_tm_intrg(struct ccw_device *cdev)
{
struct subchannel *sch = to_subchannel(cdev->dev.parent);
if (!sch->schib.pmcw.ena)
return -EINVAL;
if (cdev->private->state != DEV_STATE_ONLINE)
return -EIO;
if (!scsw_is_tm(&sch->schib.scsw) ||
......
drivers/s390/cio/io_sch.h
View file @ 6a454f71
......@@ -107,6 +107,7 @@ struct ccw_device_private {
unsigned int recog_done:1; /* dev. recog. complete */
unsigned int fake_irb:1; /* deliver faked irb */
unsigned int intretry:1; /* retry internal operation */
unsigned int resuming:1; /* recognition while resume */
} __attribute__((packed)) flags;
unsigned long intparm; /* user interruption parameter */
struct qdio_irq *qdio_data;
......
drivers/s390/net/claw.c
View file @ 6a454f71
This diff is collapsed.
drivers/s390/net/ctcm_main.c
View file @ 6a454f71
This diff is collapsed.
drivers/s390/net/lcs.c
View file @ 6a454f71
This diff is collapsed.
drivers/s390/net/netiucv.c
View file @ 6a454f71
This diff is collapsed.
drivers/s390/net/qeth_core_main.c
View file @ 6a454f71
This diff is collapsed.
drivers/s390/net/qeth_l2_main.c
View file @ 6a454f71
This diff is collapsed.
drivers/s390/net/qeth_l3_main.c
View file @ 6a454f71
This diff is collapsed.
drivers/s390/net/smsgiucv.c
View file @ 6a454f71
This diff is collapsed.
drivers/s390/scsi/zfcp_ccw.c
View file @ 6a454f71
This diff is collapsed.
mm/Kconfig
View file @ 6a454f71
......@@ -128,11 +128,11 @@ config SPARSEMEM_VMEMMAP
config MEMORY_HOTPLUG
bool "Allow for memory hot-add"
depends on SPARSEMEM || X86_64_ACPI_NUMA
depends on HOTPLUG && !HIBERNATION && ARCH_ENABLE_MEMORY_HOTPLUG
depends on HOTPLUG && !(HIBERNATION && !S390) && ARCH_ENABLE_MEMORY_HOTPLUG
depends on (IA64 || X86 || PPC64 || SUPERH || S390)
comment "Memory hotplug is currently incompatible with Software Suspend"
depends on SPARSEMEM && HOTPLUG && HIBERNATION
depends on SPARSEMEM && HOTPLUG && HIBERNATION && !S390
config MEMORY_HOTPLUG_SPARSE
def_bool y
......
net/iucv/af_iucv.c
View file @ 6a454f71
This diff is collapsed.
net/iucv/iucv.c
View file @ 6a454f71
This diff is collapsed.
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