#include <asm/firmware.h>
#include <asm/lv1call.h>
#endif
+#define CREATE_TRACE_POINTS
+#include <asm/trace.h>
+
+DEFINE_PER_CPU_SHARED_ALIGNED(irq_cpustat_t, irq_stat);
+EXPORT_PER_CPU_SYMBOL(irq_stat);
int __irq_offset_value;
-static int ppc_spurious_interrupts;
#ifdef CONFIG_PPC32
EXPORT_SYMBOL(__irq_offset_value);
#endif /* CONFIG_PPC32 */
#ifdef CONFIG_PPC64
+
+#ifndef CONFIG_SPARSE_IRQ
EXPORT_SYMBOL(irq_desc);
+#endif
int distribute_irqs = 1;
: : "r" (enable), "i" (offsetof(struct paca_struct, soft_enabled)));
}
-#ifdef CONFIG_PERF_COUNTERS
-notrace void __weak perf_counter_do_pending(void)
-{
- set_perf_counter_pending(0);
-}
-#endif
-
notrace void raw_local_irq_restore(unsigned long en)
{
/*
if (!en)
return;
+#ifdef CONFIG_PPC_STD_MMU_64
if (firmware_has_feature(FW_FEATURE_ISERIES)) {
/*
* Do we need to disable preemption here? Not really: in the
if (local_paca->lppaca_ptr->int_dword.any_int)
iseries_handle_interrupts();
}
-
- if (get_perf_counter_pending())
- perf_counter_do_pending();
+#endif /* CONFIG_PPC_STD_MMU_64 */
/*
* if (get_paca()->hard_enabled) return;
EXPORT_SYMBOL(raw_local_irq_restore);
#endif /* CONFIG_PPC64 */
+static int show_other_interrupts(struct seq_file *p, int prec)
+{
+ int j;
+
+#if defined(CONFIG_PPC32) && defined(CONFIG_TAU_INT)
+ if (tau_initialized) {
+ seq_printf(p, "%*s: ", prec, "TAU");
+ for_each_online_cpu(j)
+ seq_printf(p, "%10u ", tau_interrupts(j));
+ seq_puts(p, " PowerPC Thermal Assist (cpu temp)\n");
+ }
+#endif /* CONFIG_PPC32 && CONFIG_TAU_INT */
+
+ seq_printf(p, "%*s: ", prec, "LOC");
+ for_each_online_cpu(j)
+ seq_printf(p, "%10u ", per_cpu(irq_stat, j).timer_irqs);
+ seq_printf(p, " Local timer interrupts\n");
+
+ seq_printf(p, "%*s: ", prec, "SPU");
+ for_each_online_cpu(j)
+ seq_printf(p, "%10u ", per_cpu(irq_stat, j).spurious_irqs);
+ seq_printf(p, " Spurious interrupts\n");
+
+ seq_printf(p, "%*s: ", prec, "CNT");
+ for_each_online_cpu(j)
+ seq_printf(p, "%10u ", per_cpu(irq_stat, j).pmu_irqs);
+ seq_printf(p, " Performance monitoring interrupts\n");
+
+ seq_printf(p, "%*s: ", prec, "MCE");
+ for_each_online_cpu(j)
+ seq_printf(p, "%10u ", per_cpu(irq_stat, j).mce_exceptions);
+ seq_printf(p, " Machine check exceptions\n");
+
+ return 0;
+}
+
int show_interrupts(struct seq_file *p, void *v)
{
- int i = *(loff_t *)v, j;
+ unsigned long flags, any_count = 0;
+ int i = *(loff_t *) v, j, prec;
struct irqaction *action;
- irq_desc_t *desc;
- unsigned long flags;
+ struct irq_desc *desc;
+
+ if (i > nr_irqs)
+ return 0;
+
+ for (prec = 3, j = 1000; prec < 10 && j <= nr_irqs; ++prec)
+ j *= 10;
+
+ if (i == nr_irqs)
+ return show_other_interrupts(p, prec);
+ /* print header */
if (i == 0) {
- seq_puts(p, " ");
+ seq_printf(p, "%*s", prec + 8, "");
for_each_online_cpu(j)
- seq_printf(p, "CPU%d ", j);
+ seq_printf(p, "CPU%-8d", j);
seq_putc(p, '\n');
}
- if (i < NR_IRQS) {
- desc = get_irq_desc(i);
- spin_lock_irqsave(&desc->lock, flags);
- action = desc->action;
- if (!action || !action->handler)
- goto skip;
- seq_printf(p, "%3d: ", i);
-#ifdef CONFIG_SMP
- for_each_online_cpu(j)
- seq_printf(p, "%10u ", kstat_cpu(j).irqs[i]);
-#else
- seq_printf(p, "%10u ", kstat_irqs(i));
-#endif /* CONFIG_SMP */
- if (desc->chip)
- seq_printf(p, " %s ", desc->chip->typename);
- else
- seq_puts(p, " None ");
- seq_printf(p, "%s", (desc->status & IRQ_LEVEL) ? "Level " : "Edge ");
- seq_printf(p, " %s", action->name);
- for (action = action->next; action; action = action->next)
+ desc = irq_to_desc(i);
+ if (!desc)
+ return 0;
+
+ raw_spin_lock_irqsave(&desc->lock, flags);
+ for_each_online_cpu(j)
+ any_count |= kstat_irqs_cpu(i, j);
+ action = desc->action;
+ if (!action && !any_count)
+ goto out;
+
+ seq_printf(p, "%*d: ", prec, i);
+ for_each_online_cpu(j)
+ seq_printf(p, "%10u ", kstat_irqs_cpu(i, j));
+
+ if (desc->chip)
+ seq_printf(p, " %-16s", desc->chip->name);
+ else
+ seq_printf(p, " %-16s", "None");
+ seq_printf(p, " %-8s", (desc->status & IRQ_LEVEL) ? "Level" : "Edge");
+
+ if (action) {
+ seq_printf(p, " %s", action->name);
+ while ((action = action->next) != NULL)
seq_printf(p, ", %s", action->name);
- seq_putc(p, '\n');
-skip:
- spin_unlock_irqrestore(&desc->lock, flags);
- } else if (i == NR_IRQS) {
-#if defined(CONFIG_PPC32) && defined(CONFIG_TAU_INT)
- if (tau_initialized){
- seq_puts(p, "TAU: ");
- for_each_online_cpu(j)
- seq_printf(p, "%10u ", tau_interrupts(j));
- seq_puts(p, " PowerPC Thermal Assist (cpu temp)\n");
- }
-#endif /* CONFIG_PPC32 && CONFIG_TAU_INT*/
- seq_printf(p, "BAD: %10u\n", ppc_spurious_interrupts);
}
+
+ seq_putc(p, '\n');
+out:
+ raw_spin_unlock_irqrestore(&desc->lock, flags);
return 0;
}
+/*
+ * /proc/stat helpers
+ */
+u64 arch_irq_stat_cpu(unsigned int cpu)
+{
+ u64 sum = per_cpu(irq_stat, cpu).timer_irqs;
+
+ sum += per_cpu(irq_stat, cpu).pmu_irqs;
+ sum += per_cpu(irq_stat, cpu).mce_exceptions;
+ sum += per_cpu(irq_stat, cpu).spurious_irqs;
+
+ return sum;
+}
+
#ifdef CONFIG_HOTPLUG_CPU
-void fixup_irqs(cpumask_t map)
+void fixup_irqs(const struct cpumask *map)
{
+ struct irq_desc *desc;
unsigned int irq;
static int warned;
+ cpumask_var_t mask;
- for_each_irq(irq) {
- cpumask_t mask;
+ alloc_cpumask_var(&mask, GFP_KERNEL);
- if (irq_desc[irq].status & IRQ_PER_CPU)
+ for_each_irq(irq) {
+ desc = irq_to_desc(irq);
+ if (desc && desc->status & IRQ_PER_CPU)
continue;
- cpus_and(mask, irq_desc[irq].affinity, map);
- if (any_online_cpu(mask) == NR_CPUS) {
+ cpumask_and(mask, desc->affinity, map);
+ if (cpumask_any(mask) >= nr_cpu_ids) {
printk("Breaking affinity for irq %i\n", irq);
- mask = map;
+ cpumask_copy(mask, map);
}
- if (irq_desc[irq].chip->set_affinity)
- irq_desc[irq].chip->set_affinity(irq, mask);
- else if (irq_desc[irq].action && !(warned++))
+ if (desc->chip->set_affinity)
+ desc->chip->set_affinity(irq, mask);
+ else if (desc->action && !(warned++))
printk("Cannot set affinity for irq %i\n", irq);
}
+ free_cpumask_var(mask);
+
local_irq_enable();
mdelay(1);
local_irq_disable();
}
#endif
-void do_IRQ(struct pt_regs *regs)
-{
- struct pt_regs *old_regs = set_irq_regs(regs);
- unsigned int irq;
#ifdef CONFIG_IRQSTACKS
+static inline void handle_one_irq(unsigned int irq)
+{
struct thread_info *curtp, *irqtp;
-#endif
+ unsigned long saved_sp_limit;
+ struct irq_desc *desc;
- irq_enter();
+ /* Switch to the irq stack to handle this */
+ curtp = current_thread_info();
+ irqtp = hardirq_ctx[smp_processor_id()];
+ if (curtp == irqtp) {
+ /* We're already on the irq stack, just handle it */
+ generic_handle_irq(irq);
+ return;
+ }
+
+ desc = irq_to_desc(irq);
+ saved_sp_limit = current->thread.ksp_limit;
+
+ irqtp->task = curtp->task;
+ irqtp->flags = 0;
+
+ /* Copy the softirq bits in preempt_count so that the
+ * softirq checks work in the hardirq context. */
+ irqtp->preempt_count = (irqtp->preempt_count & ~SOFTIRQ_MASK) |
+ (curtp->preempt_count & SOFTIRQ_MASK);
+
+ current->thread.ksp_limit = (unsigned long)irqtp +
+ _ALIGN_UP(sizeof(struct thread_info), 16);
+
+ call_handle_irq(irq, desc, irqtp, desc->handle_irq);
+ current->thread.ksp_limit = saved_sp_limit;
+ irqtp->task = NULL;
+
+ /* Set any flag that may have been set on the
+ * alternate stack
+ */
+ if (irqtp->flags)
+ set_bits(irqtp->flags, &curtp->flags);
+}
+#else
+static inline void handle_one_irq(unsigned int irq)
+{
+ generic_handle_irq(irq);
+}
+#endif
+
+static inline void check_stack_overflow(void)
+{
#ifdef CONFIG_DEBUG_STACKOVERFLOW
- /* Debugging check for stack overflow: is there less than 2KB free? */
- {
- long sp;
+ long sp;
- sp = __get_SP() & (THREAD_SIZE-1);
+ sp = __get_SP() & (THREAD_SIZE-1);
- if (unlikely(sp < (sizeof(struct thread_info) + 2048))) {
- printk("do_IRQ: stack overflow: %ld\n",
- sp - sizeof(struct thread_info));
- dump_stack();
- }
+ /* check for stack overflow: is there less than 2KB free? */
+ if (unlikely(sp < (sizeof(struct thread_info) + 2048))) {
+ printk("do_IRQ: stack overflow: %ld\n",
+ sp - sizeof(struct thread_info));
+ dump_stack();
}
#endif
+}
- /*
- * Every platform is required to implement ppc_md.get_irq.
- * This function will either return an irq number or NO_IRQ to
- * indicate there are no more pending.
- * The value NO_IRQ_IGNORE is for buggy hardware and means that this
- * IRQ has already been handled. -- Tom
- */
- irq = ppc_md.get_irq();
+void do_IRQ(struct pt_regs *regs)
+{
+ struct pt_regs *old_regs = set_irq_regs(regs);
+ unsigned int irq;
- if (irq != NO_IRQ && irq != NO_IRQ_IGNORE) {
-#ifdef CONFIG_IRQSTACKS
- /* Switch to the irq stack to handle this */
- curtp = current_thread_info();
- irqtp = hardirq_ctx[smp_processor_id()];
- if (curtp != irqtp) {
- struct irq_desc *desc = irq_desc + irq;
- void *handler = desc->handle_irq;
- unsigned long saved_sp_limit = current->thread.ksp_limit;
- if (handler == NULL)
- handler = &__do_IRQ;
- irqtp->task = curtp->task;
- irqtp->flags = 0;
-
- /* Copy the softirq bits in preempt_count so that the
- * softirq checks work in the hardirq context.
- */
- irqtp->preempt_count =
- (irqtp->preempt_count & ~SOFTIRQ_MASK) |
- (curtp->preempt_count & SOFTIRQ_MASK);
+ trace_irq_entry(regs);
- current->thread.ksp_limit = (unsigned long)irqtp +
- _ALIGN_UP(sizeof(struct thread_info), 16);
- call_handle_irq(irq, desc, irqtp, handler);
- current->thread.ksp_limit = saved_sp_limit;
- irqtp->task = NULL;
+ irq_enter();
+ check_stack_overflow();
- /* Set any flag that may have been set on the
- * alternate stack
- */
- if (irqtp->flags)
- set_bits(irqtp->flags, &curtp->flags);
- } else
-#endif
- generic_handle_irq(irq);
- } else if (irq != NO_IRQ_IGNORE)
- /* That's not SMP safe ... but who cares ? */
- ppc_spurious_interrupts++;
+ irq = ppc_md.get_irq();
+
+ if (irq != NO_IRQ && irq != NO_IRQ_IGNORE)
+ handle_one_irq(irq);
+ else if (irq != NO_IRQ_IGNORE)
+ __get_cpu_var(irq_stat).spurious_irqs++;
irq_exit();
set_irq_regs(old_regs);
timer_interrupt(regs);
}
#endif
+
+ trace_irq_exit(regs);
}
void __init init_IRQ(void)
*/
static LIST_HEAD(irq_hosts);
-static DEFINE_SPINLOCK(irq_big_lock);
+static DEFINE_RAW_SPINLOCK(irq_big_lock);
static unsigned int revmap_trees_allocated;
static DEFINE_MUTEX(revmap_trees_mutex);
struct irq_map_entry irq_map[NR_IRQS];
if (host->ops->match == NULL)
host->ops->match = default_irq_host_match;
- spin_lock_irqsave(&irq_big_lock, flags);
+ raw_spin_lock_irqsave(&irq_big_lock, flags);
/* If it's a legacy controller, check for duplicates and
* mark it as allocated (we use irq 0 host pointer for that
*/
if (revmap_type == IRQ_HOST_MAP_LEGACY) {
if (irq_map[0].host != NULL) {
- spin_unlock_irqrestore(&irq_big_lock, flags);
+ raw_spin_unlock_irqrestore(&irq_big_lock, flags);
/* If we are early boot, we can't free the structure,
* too bad...
* this will be fixed once slab is made available early
}
list_add(&host->link, &irq_hosts);
- spin_unlock_irqrestore(&irq_big_lock, flags);
+ raw_spin_unlock_irqrestore(&irq_big_lock, flags);
/* Additional setups per revmap type */
switch(revmap_type) {
smp_wmb();
/* Clear norequest flags */
- get_irq_desc(i)->status &= ~IRQ_NOREQUEST;
+ irq_to_desc(i)->status &= ~IRQ_NOREQUEST;
/* Legacy flags are left to default at this point,
* one can then use irq_create_mapping() to
* the absence of a device node. This isn't a problem so far
* yet though...
*/
- spin_lock_irqsave(&irq_big_lock, flags);
+ raw_spin_lock_irqsave(&irq_big_lock, flags);
list_for_each_entry(h, &irq_hosts, link)
if (h->ops->match(h, node)) {
found = h;
break;
}
- spin_unlock_irqrestore(&irq_big_lock, flags);
+ raw_spin_unlock_irqrestore(&irq_big_lock, flags);
return found;
}
EXPORT_SYMBOL_GPL(irq_find_host);
static int irq_setup_virq(struct irq_host *host, unsigned int virq,
irq_hw_number_t hwirq)
{
+ struct irq_desc *desc;
+
+ desc = irq_to_desc_alloc_node(virq, 0);
+ if (!desc) {
+ pr_debug("irq: -> allocating desc failed\n");
+ goto error;
+ }
+
/* Clear IRQ_NOREQUEST flag */
- get_irq_desc(virq)->status &= ~IRQ_NOREQUEST;
+ desc->status &= ~IRQ_NOREQUEST;
/* map it */
smp_wmb();
if (host->ops->map(host, virq, hwirq)) {
pr_debug("irq: -> mapping failed, freeing\n");
- irq_free_virt(virq, 1);
- return -1;
+ goto error;
}
return 0;
+
+error:
+ irq_free_virt(virq, 1);
+ return -1;
}
unsigned int irq_create_direct_mapping(struct irq_host *host)
return NO_IRQ;
}
}
- pr_debug("irq: -> obtained virq %d\n", virq);
if (irq_setup_virq(host, virq, hwirq))
return NO_IRQ;
+ printk(KERN_DEBUG "irq: irq %lu on host %s mapped to virtual irq %u\n",
+ hwirq, host->of_node ? host->of_node->full_name : "null", virq);
+
return virq;
}
EXPORT_SYMBOL_GPL(irq_create_mapping);
unsigned int irq_create_of_mapping(struct device_node *controller,
- u32 *intspec, unsigned int intsize)
+ const u32 *intspec, unsigned int intsize)
{
struct irq_host *host;
irq_hw_number_t hwirq;
/* Set type if specified and different than the current one */
if (type != IRQ_TYPE_NONE &&
- type != (get_irq_desc(virq)->status & IRQF_TRIGGER_MASK))
+ type != (irq_to_desc(virq)->status & IRQF_TRIGGER_MASK))
set_irq_type(virq, type);
return virq;
}
irq_map[virq].hwirq = host->inval_irq;
/* Set some flags */
- get_irq_desc(virq)->status |= IRQ_NOREQUEST;
+ irq_to_desc(virq)->status |= IRQ_NOREQUEST;
/* Free it */
irq_free_virt(virq, 1);
if (count == 0 || count > (irq_virq_count - NUM_ISA_INTERRUPTS))
return NO_IRQ;
- spin_lock_irqsave(&irq_big_lock, flags);
+ raw_spin_lock_irqsave(&irq_big_lock, flags);
/* Use hint for 1 interrupt if any */
if (count == 1 && hint >= NUM_ISA_INTERRUPTS &&
}
}
if (found == NO_IRQ) {
- spin_unlock_irqrestore(&irq_big_lock, flags);
+ raw_spin_unlock_irqrestore(&irq_big_lock, flags);
return NO_IRQ;
}
hint_found:
smp_wmb();
irq_map[i].host = host;
}
- spin_unlock_irqrestore(&irq_big_lock, flags);
+ raw_spin_unlock_irqrestore(&irq_big_lock, flags);
return found;
}
WARN_ON (virq < NUM_ISA_INTERRUPTS);
WARN_ON (count == 0 || (virq + count) > irq_virq_count);
- spin_lock_irqsave(&irq_big_lock, flags);
+ raw_spin_lock_irqsave(&irq_big_lock, flags);
for (i = virq; i < (virq + count); i++) {
struct irq_host *host;
smp_wmb();
irq_map[i].host = NULL;
}
- spin_unlock_irqrestore(&irq_big_lock, flags);
+ raw_spin_unlock_irqrestore(&irq_big_lock, flags);
}
-void irq_early_init(void)
+int arch_early_irq_init(void)
{
- unsigned int i;
+ struct irq_desc *desc;
+ int i;
- for (i = 0; i < NR_IRQS; i++)
- get_irq_desc(i)->status |= IRQ_NOREQUEST;
+ for (i = 0; i < NR_IRQS; i++) {
+ desc = irq_to_desc(i);
+ if (desc)
+ desc->status |= IRQ_NOREQUEST;
+ }
+
+ return 0;
+}
+
+int arch_init_chip_data(struct irq_desc *desc, int node)
+{
+ desc->status |= IRQ_NOREQUEST;
+ return 0;
}
/* We need to create the radix trees late */
static int virq_debug_show(struct seq_file *m, void *private)
{
unsigned long flags;
- irq_desc_t *desc;
+ struct irq_desc *desc;
const char *p;
char none[] = "none";
int i;
seq_printf(m, "%-5s %-7s %-15s %s\n", "virq", "hwirq",
"chip name", "host name");
- for (i = 1; i < NR_IRQS; i++) {
- desc = get_irq_desc(i);
- spin_lock_irqsave(&desc->lock, flags);
+ for (i = 1; i < nr_irqs; i++) {
+ desc = irq_to_desc(i);
+ if (!desc)
+ continue;
+
+ raw_spin_lock_irqsave(&desc->lock, flags);
if (desc->action && desc->action->handler) {
seq_printf(m, "%5d ", i);
seq_printf(m, "0x%05lx ", virq_to_hw(i));
- if (desc->chip && desc->chip->typename)
- p = desc->chip->typename;
+ if (desc->chip && desc->chip->name)
+ p = desc->chip->name;
else
p = none;
seq_printf(m, "%-15s ", p);
seq_printf(m, "%s\n", p);
}
- spin_unlock_irqrestore(&desc->lock, flags);
+ raw_spin_unlock_irqrestore(&desc->lock, flags);
}
return 0;
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff