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Merge "irqdomain: Implement and expose API to clear IRQ mapping for radix tree"

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qctecmdr 2019-07-30 19:29:10 -07:00 • committed by Gerrit - the friendly Code Review server
commit be22176095
1 changed files with 33 additions and 0 deletions
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33
include/linux/irqdomain.h
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@ -35,6 +35,8 @@
#include <linux/of.h>
#include <linux/mutex.h>
#include <linux/radix-tree.h>
#include <linux/slab.h>
#include <linux/irq.h>
struct device_node;
struct irq_domain;
@ -380,6 +382,37 @@ extern unsigned int irq_create_mapping(struct irq_domain *host,
extern unsigned int irq_create_fwspec_mapping(struct irq_fwspec *fwspec);
extern void irq_dispose_mapping(unsigned int virq);
/**
* irq_dispose_all_tree_mappings() - Unmaps all interrupts from a domain
* @domain: domain owning the interrupt range
*
* This routine helps unmap all the interrupts that were mapped to the
* domain using a radix tree.
*/
static inline void irq_dispose_all_tree_mappings(
struct irq_domain *domain)
{
struct irq_data **irq_data;
unsigned int num_irqs = 0;
unsigned int max_irqs = domain->mapcount;
unsigned int index = 0;
if (!max_irqs)
return;
irq_data = kcalloc(max_irqs, sizeof(*irq_data), GFP_KERNEL);
if (!irq_data)
return;
rcu_read_lock();
num_irqs = radix_tree_gang_lookup(&domain->revmap_tree,
(void **)irq_data, 0, max_irqs);
rcu_read_unlock();
for (index = 0; index < num_irqs; index++)
irq_dispose_mapping(irq_data[index]->irq);
kfree(irq_data);
}
/**
* irq_linear_revmap() - Find a linux irq from a hw irq number.
* @domain: domain owning this hardware interrupt