#include <linux/workqueue.h>
#include <linux/cpumask.h>
#include <linux/kdebug.h>
+#include <linux/cpu.h>
#include <asm/delay.h>
#include <asm/machvec.h>
* Outputs
* None
*/
-static void __init
+void
ia64_mca_register_cpev (int cpev)
{
/* Register the CPE interrupt vector with SAL */
/*
* ia64_mca_wakeup
*
- * Send an inter-cpu interrupt to wake-up a particular cpu
- * and mark that cpu to be out of rendez.
+ * Send an inter-cpu interrupt to wake-up a particular cpu.
*
* Inputs : cpuid
* Outputs : None
ia64_mca_wakeup(int cpu)
{
platform_send_ipi(cpu, IA64_MCA_WAKEUP_VECTOR, IA64_IPI_DM_INT, 0);
- ia64_mc_info.imi_rendez_checkin[cpu] = IA64_MCA_RENDEZ_CHECKIN_NOTDONE;
-
}
/*
* ia64_mca_wakeup_all
*
- * Wakeup all the cpus which have rendez'ed previously.
+ * Wakeup all the slave cpus which have rendez'ed previously.
*
* Inputs : None
* Outputs : None
*
* This is handler used to put slave processors into spinloop
* while the monarch processor does the mca handling and later
- * wake each slave up once the monarch is done.
+ * wake each slave up once the monarch is done. The state
+ * IA64_MCA_RENDEZ_CHECKIN_DONE indicates the cpu is rendez'ed
+ * in SAL. The state IA64_MCA_RENDEZ_CHECKIN_NOTDONE indicates
+ * the cpu has come out of OS rendezvous.
*
* Inputs : None
* Outputs : None
(long)&nd, 0, 0) == NOTIFY_STOP)
ia64_mca_spin(__FUNCTION__);
+ ia64_mc_info.imi_rendez_checkin[cpu] = IA64_MCA_RENDEZ_CHECKIN_NOTDONE;
/* Enable all interrupts */
local_irq_restore(flags);
return IRQ_HANDLED;
static void
ia64_wait_for_slaves(int monarch, const char *type)
{
- int c, wait = 0, missing = 0;
- for_each_online_cpu(c) {
- if (c == monarch)
- continue;
- if (ia64_mc_info.imi_rendez_checkin[c] == IA64_MCA_RENDEZ_CHECKIN_NOTDONE) {
- udelay(1000); /* short wait first */
- wait = 1;
- break;
- }
- }
- if (!wait)
- goto all_in;
- for_each_online_cpu(c) {
- if (c == monarch)
- continue;
- if (ia64_mc_info.imi_rendez_checkin[c] == IA64_MCA_RENDEZ_CHECKIN_NOTDONE) {
- udelay(5*1000000); /* wait 5 seconds for slaves (arbitrary) */
- if (ia64_mc_info.imi_rendez_checkin[c] == IA64_MCA_RENDEZ_CHECKIN_NOTDONE)
- missing = 1;
- break;
+ int c, i , wait;
+
+ /*
+ * wait 5 seconds total for slaves (arbitrary)
+ */
+ for (i = 0; i < 5000; i++) {
+ wait = 0;
+ for_each_online_cpu(c) {
+ if (c == monarch)
+ continue;
+ if (ia64_mc_info.imi_rendez_checkin[c]
+ == IA64_MCA_RENDEZ_CHECKIN_NOTDONE) {
+ udelay(1000); /* short wait */
+ wait = 1;
+ break;
+ }
}
+ if (!wait)
+ goto all_in;
}
- if (!missing)
- goto all_in;
+
/*
* Maybe slave(s) dead. Print buffered messages immediately.
*/
if (notify_die(DIE_MCA_MONARCH_ENTER, "MCA", regs, (long)&nd, 0, 0)
== NOTIFY_STOP)
ia64_mca_spin(__FUNCTION__);
+
+ ia64_mc_info.imi_rendez_checkin[cpu] = IA64_MCA_RENDEZ_CHECKIN_CONCURRENT_MCA;
if (sos->monarch) {
ia64_wait_for_slaves(cpu, "MCA");
+
+ /* Wakeup all the processors which are spinning in the
+ * rendezvous loop. They will leave SAL, then spin in the OS
+ * with interrupts disabled until this monarch cpu leaves the
+ * MCA handler. That gets control back to the OS so we can
+ * backtrace the other cpus, backtrace when spinning in SAL
+ * does not work.
+ */
+ ia64_mca_wakeup_all();
+ if (notify_die(DIE_MCA_MONARCH_PROCESS, "MCA", regs, (long)&nd, 0, 0)
+ == NOTIFY_STOP)
+ ia64_mca_spin(__FUNCTION__);
} else {
- ia64_mc_info.imi_rendez_checkin[cpu] = IA64_MCA_RENDEZ_CHECKIN_CONCURRENT_MCA;
while (cpu_isset(cpu, mca_cpu))
cpu_relax(); /* spin until monarch wakes us */
- ia64_mc_info.imi_rendez_checkin[cpu] = IA64_MCA_RENDEZ_CHECKIN_NOTDONE;
}
- /* Wakeup all the processors which are spinning in the rendezvous loop.
- * They will leave SAL, then spin in the OS with interrupts disabled
- * until this monarch cpu leaves the MCA handler. That gets control
- * back to the OS so we can backtrace the other cpus, backtrace when
- * spinning in SAL does not work.
- */
- ia64_mca_wakeup_all();
- if (notify_die(DIE_MCA_MONARCH_PROCESS, "MCA", regs, (long)&nd, 0, 0)
- == NOTIFY_STOP)
- ia64_mca_spin(__FUNCTION__);
-
/* Get the MCA error record and log it */
ia64_mca_log_sal_error_record(SAL_INFO_TYPE_MCA);
/* wake up the next monarch cpu,
* and put this cpu in the rendez loop.
*/
- ia64_mc_info.imi_rendez_checkin[cpu] = IA64_MCA_RENDEZ_CHECKIN_CONCURRENT_MCA;
for_each_online_cpu(i) {
if (cpu_isset(i, mca_cpu)) {
monarch_cpu = i;
cpu_clear(i, mca_cpu); /* wake next cpu */
while (monarch_cpu != -1)
cpu_relax(); /* spin until last cpu leaves */
- ia64_mc_info.imi_rendez_checkin[cpu] = IA64_MCA_RENDEZ_CHECKIN_NOTDONE;
set_curr_task(cpu, previous_current);
+ ia64_mc_info.imi_rendez_checkin[cpu]
+ = IA64_MCA_RENDEZ_CHECKIN_NOTDONE;
return;
}
}
}
set_curr_task(cpu, previous_current);
- monarch_cpu = -1;
+ ia64_mc_info.imi_rendez_checkin[cpu] = IA64_MCA_RENDEZ_CHECKIN_NOTDONE;
+ monarch_cpu = -1; /* This frees the slaves and previous monarchs */
}
static DECLARE_WORK(cmc_disable_work, ia64_mca_cmc_vector_disable_keventd);
strncpy(p->comm, type, sizeof(p->comm)-1);
}
-/* Do per-CPU MCA-related initialization. */
+/* Caller prevents this from being called after init */
+static void * __init_refok mca_bootmem(void)
+{
+ void *p;
+
+ p = alloc_bootmem(sizeof(struct ia64_mca_cpu) * NR_CPUS +
+ KERNEL_STACK_SIZE);
+ return (void *)ALIGN((unsigned long)p, KERNEL_STACK_SIZE);
+}
+/* Do per-CPU MCA-related initialization. */
void __cpuinit
ia64_mca_cpu_init(void *cpu_data)
{
int cpu;
first_time = 0;
- mca_data = alloc_bootmem(sizeof(struct ia64_mca_cpu)
- * NR_CPUS + KERNEL_STACK_SIZE);
- mca_data = (void *)(((unsigned long)mca_data +
- KERNEL_STACK_SIZE - 1) &
- (-KERNEL_STACK_SIZE));
+ mca_data = mca_bootmem();
for (cpu = 0; cpu < NR_CPUS; cpu++) {
format_mca_init_stack(mca_data,
offsetof(struct ia64_mca_cpu, mca_stack),
PAGE_KERNEL));
}
+static void __cpuinit ia64_mca_cmc_vector_adjust(void *dummy)
+{
+ unsigned long flags;
+
+ local_irq_save(flags);
+ if (!cmc_polling_enabled)
+ ia64_mca_cmc_vector_enable(NULL);
+ local_irq_restore(flags);
+}
+
+static int __cpuinit mca_cpu_callback(struct notifier_block *nfb,
+ unsigned long action,
+ void *hcpu)
+{
+ int hotcpu = (unsigned long) hcpu;
+
+ switch (action) {
+ case CPU_ONLINE:
+ case CPU_ONLINE_FROZEN:
+ smp_call_function_single(hotcpu, ia64_mca_cmc_vector_adjust,
+ NULL, 1, 0);
+ break;
+ }
+ return NOTIFY_OK;
+}
+
+static struct notifier_block mca_cpu_notifier __cpuinitdata = {
+ .notifier_call = mca_cpu_callback
+};
+
/*
* ia64_mca_init
*
if (!mca_init)
return 0;
+ register_hotcpu_notifier(&mca_cpu_notifier);
+
/* Setup the CMCI/P vector and handler */
init_timer(&cmc_poll_timer);
cmc_poll_timer.function = ia64_mca_cmc_poll;
if (cpe_vector >= 0) {
/* If platform supports CPEI, enable the irq. */
- cpe_poll_enabled = 0;
- for (irq = 0; irq < NR_IRQS; ++irq)
- if (irq_to_vector(irq) == cpe_vector) {
- desc = irq_desc + irq;
- desc->status |= IRQ_PER_CPU;
- setup_irq(irq, &mca_cpe_irqaction);
- ia64_cpe_irq = irq;
- }
- ia64_mca_register_cpev(cpe_vector);
- IA64_MCA_DEBUG("%s: CPEI/P setup and enabled.\n", __FUNCTION__);
- } else {
- /* If platform doesn't support CPEI, get the timer going. */
- if (cpe_poll_enabled) {
- ia64_mca_cpe_poll(0UL);
- IA64_MCA_DEBUG("%s: CPEP setup and enabled.\n", __FUNCTION__);
+ irq = local_vector_to_irq(cpe_vector);
+ if (irq > 0) {
+ cpe_poll_enabled = 0;
+ desc = irq_desc + irq;
+ desc->status |= IRQ_PER_CPU;
+ setup_irq(irq, &mca_cpe_irqaction);
+ ia64_cpe_irq = irq;
+ ia64_mca_register_cpev(cpe_vector);
+ IA64_MCA_DEBUG("%s: CPEI/P setup and enabled.\n",
+ __FUNCTION__);
+ return 0;
}
+ printk(KERN_ERR "%s: Failed to find irq for CPE "
+ "interrupt handler, vector %d\n",
+ __FUNCTION__, cpe_vector);
+ }
+ /* If platform doesn't support CPEI, get the timer going. */
+ if (cpe_poll_enabled) {
+ ia64_mca_cpe_poll(0UL);
+ IA64_MCA_DEBUG("%s: CPEP setup and enabled.\n", __FUNCTION__);
}
}
#endif
projects / linux-2.6-block.git / blobdiff