#include "internals.h"
+/*
+ * lockdep: we want to handle all irq_desc locks as a single lock-class:
+ */
+static struct lock_class_key irq_desc_lock_class;
+
/**
* handle_bad_irq - handle spurious and unhandled irqs
* @irq: the interrupt number
handle_bad_irq(unsigned int irq, struct irq_desc *desc)
{
print_irq_desc(irq, desc);
- kstat_this_cpu.irqs[irq]++;
+#ifdef CONFIG_HAVE_DYN_ARRAY
+ kstat_irqs_this_cpu(desc)++;
+#else
+ kstat_irqs_this_cpu(irq)++;
+#endif
ack_bad_irq(irq);
}
*
* Controller mappings for all interrupt sources:
*/
+int nr_irqs = NR_IRQS;
+EXPORT_SYMBOL_GPL(nr_irqs);
+
+#ifdef CONFIG_HAVE_DYN_ARRAY
+static struct irq_desc irq_desc_init = {
+ .irq = -1U,
+ .status = IRQ_DISABLED,
+ .chip = &no_irq_chip,
+ .handle_irq = handle_bad_irq,
+ .depth = 1,
+ .lock = __SPIN_LOCK_UNLOCKED(irq_desc_init.lock),
+#ifdef CONFIG_SMP
+ .affinity = CPU_MASK_ALL
+#endif
+};
+
+
+static void init_one_irq_desc(struct irq_desc *desc)
+{
+ memcpy(desc, &irq_desc_init, sizeof(struct irq_desc));
+ lockdep_set_class(&desc->lock, &irq_desc_lock_class);
+}
+
+extern int after_bootmem;
+extern void *__alloc_bootmem_nopanic(unsigned long size,
+ unsigned long align,
+ unsigned long goal);
+
+static void init_kstat_irqs(struct irq_desc *desc, int nr_desc, int nr)
+{
+ unsigned long bytes, total_bytes;
+ char *ptr;
+ int i;
+ unsigned long phys;
+
+ /* Compute how many bytes we need per irq and allocate them */
+ bytes = nr * sizeof(unsigned int);
+ total_bytes = bytes * nr_desc;
+ if (after_bootmem)
+ ptr = kzalloc(total_bytes, GFP_ATOMIC);
+ else
+ ptr = __alloc_bootmem_nopanic(total_bytes, PAGE_SIZE, 0);
+
+ if (!ptr)
+ panic(" can not allocate kstat_irqs\n");
+
+ phys = __pa(ptr);
+ printk(KERN_DEBUG "kstat_irqs ==> [%#lx - %#lx]\n", phys, phys + total_bytes);
+
+ for (i = 0; i < nr_desc; i++) {
+ desc[i].kstat_irqs = (unsigned int *)ptr;
+ ptr += bytes;
+ }
+}
+
+#ifdef CONFIG_HAVE_SPARSE_IRQ
+/*
+ * Protect the sparse_irqs_free freelist:
+ */
+static DEFINE_SPINLOCK(sparse_irq_lock);
+static struct irq_desc *sparse_irqs_free;
+struct irq_desc *sparse_irqs;
+#endif
+
+static void __init init_work(void *data)
+{
+ struct dyn_array *da = data;
+ int i;
+ struct irq_desc *desc;
+
+ desc = *da->name;
+
+ for (i = 0; i < *da->nr; i++) {
+ init_one_irq_desc(&desc[i]);
+#ifndef CONFIG_HAVE_SPARSE_IRQ
+ desc[i].irq = i;
+#endif
+ }
+
+ /* init kstat_irqs, nr_cpu_ids is ready already */
+ init_kstat_irqs(desc, *da->nr, nr_cpu_ids);
+
+#ifdef CONFIG_HAVE_SPARSE_IRQ
+ for (i = 1; i < *da->nr; i++)
+ desc[i-1].next = &desc[i];
+
+ sparse_irqs_free = sparse_irqs;
+ sparse_irqs = NULL;
+#endif
+}
+
+#ifdef CONFIG_HAVE_SPARSE_IRQ
+static int nr_irq_desc = 32;
+
+static int __init parse_nr_irq_desc(char *arg)
+{
+ if (arg)
+ nr_irq_desc = simple_strtoul(arg, NULL, 0);
+ return 0;
+}
+
+early_param("nr_irq_desc", parse_nr_irq_desc);
+
+DEFINE_DYN_ARRAY(sparse_irqs, sizeof(struct irq_desc), nr_irq_desc, PAGE_SIZE, init_work);
+
+struct irq_desc *irq_to_desc(unsigned int irq)
+{
+ struct irq_desc *desc;
+
+ desc = sparse_irqs;
+ while (desc) {
+ if (desc->irq == irq)
+ return desc;
+
+ desc = desc->next;
+ }
+ return NULL;
+}
+
+struct irq_desc *irq_to_desc_alloc(unsigned int irq)
+{
+ struct irq_desc *desc, *desc_pri;
+ unsigned long flags;
+ int count = 0;
+ int i;
+
+ desc_pri = desc = sparse_irqs;
+ while (desc) {
+ if (desc->irq == irq)
+ return desc;
+
+ desc_pri = desc;
+ desc = desc->next;
+ count++;
+ }
+
+ spin_lock_irqsave(&sparse_irq_lock, flags);
+ /*
+ * we run out of pre-allocate ones, allocate more
+ */
+ if (!sparse_irqs_free) {
+ unsigned long phys;
+ unsigned long total_bytes;
+
+ printk(KERN_DEBUG "try to get more irq_desc %d\n", nr_irq_desc);
+
+ total_bytes = sizeof(struct irq_desc) * nr_irq_desc;
+ if (after_bootmem)
+ desc = kzalloc(total_bytes, GFP_ATOMIC);
+ else
+ desc = __alloc_bootmem_nopanic(total_bytes, PAGE_SIZE, 0);
+
+ if (!desc)
+ panic("please boot with nr_irq_desc= %d\n", count * 2);
+
+ phys = __pa(desc);
+ printk(KERN_DEBUG "irq_desc ==> [%#lx - %#lx]\n", phys, phys + total_bytes);
+
+ for (i = 0; i < nr_irq_desc; i++)
+ init_one_irq_desc(&desc[i]);
+
+ for (i = 1; i < nr_irq_desc; i++)
+ desc[i-1].next = &desc[i];
+
+ /* init kstat_irqs, nr_cpu_ids is ready already */
+ init_kstat_irqs(desc, nr_irq_desc, nr_cpu_ids);
+
+ sparse_irqs_free = desc;
+ }
+
+ desc = sparse_irqs_free;
+ sparse_irqs_free = sparse_irqs_free->next;
+ desc->next = NULL;
+ if (desc_pri)
+ desc_pri->next = desc;
+ else
+ sparse_irqs = desc;
+ desc->irq = irq;
+
+ spin_unlock_irqrestore(&sparse_irq_lock, flags);
+
+ return desc;
+}
+#else
+struct irq_desc *irq_desc;
+DEFINE_DYN_ARRAY(irq_desc, sizeof(struct irq_desc), nr_irqs, PAGE_SIZE, init_work);
+
+#endif
+
+#else
+
struct irq_desc irq_desc[NR_IRQS] __cacheline_aligned_in_smp = {
[0 ... NR_IRQS-1] = {
.status = IRQ_DISABLED,
.chip = &no_irq_chip,
.handle_irq = handle_bad_irq,
.depth = 1,
- .lock = __SPIN_LOCK_UNLOCKED(irq_desc->lock),
+ .lock = __SPIN_LOCK_UNLOCKED(sparse_irqs->lock),
#ifdef CONFIG_SMP
.affinity = CPU_MASK_ALL
#endif
}
};
+#endif
+
+#ifndef CONFIG_HAVE_SPARSE_IRQ
+struct irq_desc *irq_to_desc(unsigned int irq)
+{
+ if (irq < nr_irqs)
+ return &irq_desc[irq];
+
+ return NULL;
+}
+struct irq_desc *irq_to_desc_alloc(unsigned int irq)
+{
+ return irq_to_desc(irq);
+}
+#endif
+
/*
* What should we do if we get a hw irq event on an illegal vector?
* Each architecture has to answer this themself.
*/
static void ack_bad(unsigned int irq)
{
- print_irq_desc(irq, irq_desc + irq);
+ struct irq_desc *desc;
+
+ desc = irq_to_desc(irq);
+ print_irq_desc(irq, desc);
ack_bad_irq(irq);
}
irqreturn_t ret, retval = IRQ_NONE;
unsigned int status = 0;
- handle_dynamic_tick(action);
-
if (!(action->flags & IRQF_DISABLED))
local_irq_enable_in_hardirq();
*/
unsigned int __do_IRQ(unsigned int irq)
{
- struct irq_desc *desc = irq_desc + irq;
+ struct irq_desc *desc = irq_to_desc(irq);
struct irqaction *action;
unsigned int status;
- kstat_this_cpu.irqs[irq]++;
+#ifdef CONFIG_HAVE_DYN_ARRAY
+ kstat_irqs_this_cpu(desc)++;
+#else
+ kstat_irqs_this_cpu(irq)++;
+#endif
if (CHECK_IRQ_PER_CPU(desc->status)) {
irqreturn_t action_ret;
}
#endif
-#ifdef CONFIG_TRACE_IRQFLAGS
-
-/*
- * lockdep: we want to handle all irq_desc locks as a single lock-class:
- */
-static struct lock_class_key irq_desc_lock_class;
+#ifdef CONFIG_TRACE_IRQFLAGS
void early_init_irq_lock_class(void)
{
+#ifndef CONFIG_HAVE_DYN_ARRAY
int i;
- for (i = 0; i < NR_IRQS; i++)
+ for (i = 0; i < nr_irqs; i++)
lockdep_set_class(&irq_desc[i].lock, &irq_desc_lock_class);
+#endif
}
+#endif
+#ifdef CONFIG_HAVE_DYN_ARRAY
+unsigned int kstat_irqs_cpu(unsigned int irq, int cpu)
+{
+ struct irq_desc *desc = irq_to_desc(irq);
+ return desc->kstat_irqs[cpu];
+}
#endif
+EXPORT_SYMBOL(kstat_irqs_cpu);
+
projects / linux-2.6-omap-h63xx.git / blobdiff