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irq: separate sparse_irqs from sparse_irqs_free 

so later don't need compare with -1U

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Yinghai Lu 2008-08-19 20:50:18 -07:00 committed by Ingo Molnar
parent cb5bc83225
commit 67fb283e14
2 changed files with 64 additions and 57 deletions
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2
include/linux/irq.h
View File

@ -211,7 +211,7 @@ extern struct irq_desc *irq_desc;
extern struct irq_desc *sparse_irqs; extern struct irq_desc *sparse_irqs;
#define for_each_irq_desc(irqX, desc) \ #define for_each_irq_desc(irqX, desc) \
for (desc = sparse_irqs, irqX = desc->irq; desc && irqX != -1U; desc = desc->next, irqX = desc ? desc->irq : -1U) for (desc = sparse_irqs, irqX = desc->irq; desc; desc = desc->next, irqX = desc ? desc->irq : -1U)
#endif #endif

119
kernel/irq/handle.c
View File

@ -112,6 +112,11 @@ static void init_kstat_irqs(struct irq_desc *desc, int nr_desc, int nr)
} }
} }
#ifdef CONFIG_HAVE_SPARSE_IRQ
static struct irq_desc *sparse_irqs_free;
struct irq_desc *sparse_irqs;
#endif
static void __init init_work(void *data) static void __init init_work(void *data)
{ {
struct dyn_array *da = data; struct dyn_array *da = data;
@ -127,13 +132,16 @@ static void __init init_work(void *data)
#endif #endif
} }
/* init kstat_irqs, nr_cpu_ids is ready already */
init_kstat_irqs(desc, *da->nr, nr_cpu_ids);
#ifdef CONFIG_HAVE_SPARSE_IRQ #ifdef CONFIG_HAVE_SPARSE_IRQ
for (i = 1; i < *da->nr; i++) for (i = 1; i < *da->nr; i++)
desc[i-1].next = &desc[i]; desc[i-1].next = &desc[i];
#endif
/* init kstat_irqs, nr_cpu_ids is ready already */ sparse_irqs_free = sparse_irqs;
init_kstat_irqs(desc, *da->nr, nr_cpu_ids); sparse_irqs = NULL;
#endif
} }
#ifdef CONFIG_HAVE_SPARSE_IRQ #ifdef CONFIG_HAVE_SPARSE_IRQ
@ -148,23 +156,17 @@ static int __init parse_nr_irq_desc(char *arg)
early_param("nr_irq_desc", parse_nr_irq_desc); early_param("nr_irq_desc", parse_nr_irq_desc);
struct irq_desc *sparse_irqs;
DEFINE_DYN_ARRAY(sparse_irqs, sizeof(struct irq_desc), nr_irq_desc, PAGE_SIZE, init_work); 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 *irq_to_desc(unsigned int irq)
{ {
struct irq_desc *desc; struct irq_desc *desc;
BUG_ON(irq == -1U); desc = sparse_irqs;
desc = &sparse_irqs[0];
while (desc) { while (desc) {
if (desc->irq == irq) if (desc->irq == irq)
return desc; return desc;
if (desc->irq == -1U)
return NULL;
desc = desc->next; desc = desc->next;
} }
return NULL; return NULL;
@ -174,21 +176,12 @@ struct irq_desc *irq_to_desc_alloc(unsigned int irq)
struct irq_desc *desc, *desc_pri; struct irq_desc *desc, *desc_pri;
int i; int i;
int count = 0; int count = 0;
unsigned long phys;
unsigned long total_bytes;
BUG_ON(irq == -1U); desc_pri = desc = sparse_irqs;
desc_pri = desc = &sparse_irqs[0];
while (desc) { while (desc) {
if (desc->irq == irq) if (desc->irq == irq)
return desc; return desc;
if (desc->irq == -1U) {
desc->irq = irq;
printk(KERN_DEBUG "found new irq_desc for irq %d\n", desc->irq);
return desc;
}
desc_pri = desc; desc_pri = desc;
desc = desc->next; desc = desc->next;
count++; count++;
@ -197,48 +190,62 @@ struct irq_desc *irq_to_desc_alloc(unsigned int irq)
/* /*
* we run out of pre-allocate ones, allocate more * we run out of pre-allocate ones, allocate more
*/ */
printk(KERN_DEBUG "try to get more irq_desc %d\n", nr_irq_desc); if (!sparse_irqs_free) {
{ unsigned long phys;
/* double check if some one mess up the list */ unsigned long total_bytes;
struct irq_desc *desc;
int count = 0;
desc = &sparse_irqs[0]; printk(KERN_DEBUG "try to get more irq_desc %d\n", nr_irq_desc);
while (desc) {
printk(KERN_DEBUG "found irq_desc for irq %d\n", desc->irq); total_bytes = sizeof(struct irq_desc) * nr_irq_desc;
if (desc->next) if (after_bootmem)
printk(KERN_DEBUG "found irq_desc for irq %d and next will be irq %d\n", desc->irq, desc->next->irq); desc = kzalloc(total_bytes, GFP_ATOMIC);
desc = desc->next; else
count++; desc = __alloc_bootmem_nopanic(total_bytes, PAGE_SIZE, 0);
}
printk(KERN_DEBUG "all preallocted %d\n", count); 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;
} }
total_bytes = sizeof(struct irq_desc) * nr_irq_desc; desc = sparse_irqs_free;
if (after_bootmem) sparse_irqs_free = sparse_irqs_free->next;
desc = kzalloc(total_bytes, GFP_ATOMIC); desc->next = NULL;
if (desc_pri)
desc_pri->next = desc;
else else
desc = __alloc_bootmem_nopanic(total_bytes, PAGE_SIZE, 0); sparse_irqs = desc;
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);
desc->irq = irq; desc->irq = irq;
desc_pri->next = desc; printk(KERN_DEBUG "found new irq_desc for irq %d\n", desc->irq);
printk(KERN_DEBUG "1 found new irq_desc for irq %d and pri will be irq %d\n", desc->irq, desc_pri->irq); #ifdef CONFIG_HAVE_SPARSE_IRQ_DEBUG
{
/* dump the results */
struct irq_desc *desc;
unsigned long phys;
unsigned long bytes = sizeof(struct irq_desc);
unsigned int irqx;
printk(KERN_DEBUG "=========================== %d\n", irq);
printk(KERN_DEBUG "irq_desc dump after get that for %d\n", irq);
for_each_irq_desc(irqx, desc) {
phys = __pa(desc);
printk(KERN_DEBUG "irq_desc %d ==> [%#lx - %#lx]\n", irqx, phys, phys + bytes);
}
printk(KERN_DEBUG "===========================\n");
}
#endif
return desc; return desc;
} }
#else #else