/*
* s390_init_machine_check
*
* initialize machine check handling
*/
static int
machine_check_init(void)
{
init_MUTEX_LOCKED(&m_sem);
ctl_clear_bit(14, 25); /* disable damage MCH */
ctl_set_bit(14, 26); /* enable degradation MCH */
ctl_set_bit(14, 27); /* enable system recovery MCH */
#ifdef CONFIG_MACHCHK_WARNING
ctl_set_bit(14, 24); /* enable warning MCH */
#endif
return 0;
}
struct subchannel *
cio_probe_console(void)
{
int irq, ret;
if (xchg(&console_subchannel_in_use, 1) != 0)
return ERR_PTR(-EBUSY);
irq = cio_console_irq();
if (irq == -1) {
console_subchannel_in_use = 0;
return ERR_PTR(-ENODEV);
}
memset(&console_subchannel, 0, sizeof(struct subchannel));
ret = cio_validate_subchannel(&console_subchannel, irq);
if (ret) {
console_subchannel_in_use = 0;
return ERR_PTR(-ENODEV);
}
/*
* enable console I/O-interrupt subclass 7
*/
ctl_set_bit(6, 24);
console_subchannel.schib.pmcw.isc = 7;
console_subchannel.schib.pmcw.intparm =
(__u32)(unsigned long)&console_subchannel;
ret = cio_modify(&console_subchannel);
if (ret) {
console_subchannel_in_use = 0;
return ERR_PTR(ret);
}
return &console_subchannel;
}
/*
* Machine checks for the channel subsystem must be enabled
* after the channel subsystem is initialized
*/
static int __init
machine_check_crw_init (void)
{
kernel_thread(s390_collect_crw_info, &m_sem, CLONE_FS|CLONE_FILES);
ctl_set_bit(14, 28); /* enable channel report MCH */
return 0;
}
/*
* Machine checks for the channel subsystem must be enabled
* after the channel subsystem is initialized
*/
static int __init crw_machine_check_init(void)
{
struct task_struct *task;
task = kthread_run(crw_collect_info, NULL, "kmcheck");
if (IS_ERR(task))
return PTR_ERR(task);
ctl_set_bit(14, 28); /* enable channel report MCH */
return 0;
}
void isc_register(unsigned int isc)
{
if (isc > MAX_ISC) {
WARN_ON(1);
return;
}
spin_lock(&isc_ref_lock);
if (isc_refs[isc] == 0)
ctl_set_bit(6, 31 - isc);
isc_refs[isc]++;
spin_unlock(&isc_ref_lock);
}
struct subchannel *
cio_probe_console(void)
{
int sch_no, ret;
struct subchannel_id schid;
if (xchg(&console_subchannel_in_use, 1) != 0)
return ERR_PTR(-EBUSY);
sch_no = cio_get_console_sch_no();
if (sch_no == -1) {
console_subchannel_in_use = 0;
return ERR_PTR(-ENODEV);
}
memset(&console_subchannel, 0, sizeof(struct subchannel));
init_subchannel_id(&schid);
schid.sch_no = sch_no;
ret = cio_validate_subchannel(&console_subchannel, schid);
if (ret) {
console_subchannel_in_use = 0;
return ERR_PTR(-ENODEV);
}
/*
* enable console I/O-interrupt subclass 7
*/
ctl_set_bit(6, 24);
console_subchannel.schib.pmcw.isc = 7;
console_subchannel.schib.pmcw.intparm =
(__u32)(unsigned long)&console_subchannel;
ret = cio_modify(&console_subchannel);
if (ret) {
console_subchannel_in_use = 0;
return ERR_PTR(ret);
}
return &console_subchannel;
}
/*
* s390_init_machine_check
*
* initialize machine check handling
*/
void s390_init_machine_check( void )
{
crwe_t *pcrwe; /* CRW buffer element pointer */
mache_t *pmache; /* machine check element pointer */
init_MUTEX_LOCKED( &s_sem );
pcrwe = kmalloc( MAX_CRW_PENDING * sizeof( crwe_t), GFP_KERNEL);
if ( pcrwe )
{
int i;
crw_buffer_anchor = pcrwe;
for ( i=0; i < MAX_CRW_PENDING-1; i++)
{
pcrwe->crwe_next = (crwe_t *)((unsigned long)pcrwe + sizeof(crwe_t));
pcrwe = pcrwe->crwe_next;
} /* endfor */
pcrwe->crwe_next = NULL;
}
else
{
panic( "s390_init_machine_check : unable to obtain memory\n");
} /* endif */
pmache = kmalloc( MAX_MACH_PENDING * sizeof( mache_t), GFP_KERNEL);
if ( pmache )
{
int i;
for ( i=0; i < MAX_MACH_PENDING; i++)
{
s390_enqueue_free_mchchk( pmache );
pmache = (mache_t *)((unsigned long)pmache + sizeof(mache_t));
} /* endfor */
}
else
{
panic( "s390_init_machine_check : unable to obtain memory\n");
} /* endif */
#ifdef S390_MACHCHK_DEBUG
printk( KERN_NOTICE "init_mach : starting machine check handler\n");
#endif
kernel_thread( s390_machine_check_handler, &s_sem, CLONE_FS | CLONE_FILES);
ctl_clear_bit( 14, 25 ); // disable damage MCH
ctl_set_bit( 14, 26 ); /* enable degradation MCH */
ctl_set_bit( 14, 27 ); /* enable system recovery MCH */
#if 1
ctl_set_bit( 14, 28 ); // enable channel report MCH
#endif
#ifdef CONFIG_MACHCHK_WARNING
ctl_set_bit( 14, 24); /* enable warning MCH */
#endif
#ifdef S390_MACHCHK_DEBUG
printk( KERN_DEBUG "init_mach : machine check buffer : head = %08X\n",
(unsigned)&mchchk_queue_head);
printk( KERN_DEBUG "init_mach : machine check buffer : tail = %08X\n",
(unsigned)&mchchk_queue_tail);
printk( KERN_DEBUG "init_mach : machine check buffer : free = %08X\n",
(unsigned)&mchchk_queue_free);
printk( KERN_DEBUG "init_mach : CRW entry buffer anchor = %08X\n",
(unsigned)&crw_buffer_anchor);
printk( KERN_DEBUG "init_mach : machine check handler ready\n");
#endif
return;
}
