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authorMarc Zyngier <marc.zyngier@arm.com>2015-10-13 12:51:32 +0100
committerThomas Gleixner <tglx@linutronix.de>2015-10-13 19:01:23 +0200
commit11e4438ee330fab0f216ee7cc1b651cb2ddceb5d (patch)
treedbae43af6b5b90d852c57c6f1b59cb6cef4866b2 /kernel/irq
parent130b8c6c8d86075304952241bf2365cea6489df1 (diff)
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irqdomain: Introduce a firmware-specific IRQ specifier structure
So far the closest thing to a generic IRQ specifier structure is of_phandle_args, which happens to be pretty OF specific (the of_node pointer in there is quite annoying). Let's introduce 'struct irq_fwspec' that can be used in place of of_phandle_args for OF, but also for other firmware implementations (that'd be ACPI). This is used together with a new 'translate' method that is the pendent of 'xlate'. We convert irq_create_of_mapping to use this new structure (with a small hack that will be removed later). Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Reviewed-and-tested-by: Hanjun Guo <hanjun.guo@linaro.org> Tested-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Cc: <linux-arm-kernel@lists.infradead.org> Cc: Tomasz Nowicki <tomasz.nowicki@linaro.org> Cc: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com> Cc: Graeme Gregory <graeme@xora.org.uk> Cc: Jake Oshins <jakeo@microsoft.com> Cc: Jiang Liu <jiang.liu@linux.intel.com> Cc: Jason Cooper <jason@lakedaemon.net> Cc: Rafael J. Wysocki <rjw@rjwysocki.net> Link: http://lkml.kernel.org/r/1444737105-31573-5-git-send-email-marc.zyngier@arm.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'kernel/irq')
-rw-r--r--kernel/irq/irqdomain.c59
1 files changed, 48 insertions, 11 deletions
diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c
index 023ab6d488f7..86dfd402ed5e 100644
--- a/kernel/irq/irqdomain.c
+++ b/kernel/irq/irqdomain.c
@@ -484,30 +484,67 @@ int irq_create_strict_mappings(struct irq_domain *domain, unsigned int irq_base,
}
EXPORT_SYMBOL_GPL(irq_create_strict_mappings);
+static int irq_domain_translate(struct irq_domain *d,
+ struct irq_fwspec *fwspec,
+ irq_hw_number_t *hwirq, unsigned int *type)
+{
+#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
+ if (d->ops->translate)
+ return d->ops->translate(d, fwspec, hwirq, type);
+#endif
+ if (d->ops->xlate)
+ return d->ops->xlate(d, to_of_node(fwspec->fwnode),
+ fwspec->param, fwspec->param_count,
+ hwirq, type);
+
+ /* If domain has no translation, then we assume interrupt line */
+ *hwirq = fwspec->param[0];
+ return 0;
+}
+
+static void of_phandle_args_to_fwspec(struct of_phandle_args *irq_data,
+ struct irq_fwspec *fwspec)
+{
+ int i;
+
+ fwspec->fwnode = irq_data->np ? &irq_data->np->fwnode : NULL;
+ fwspec->param_count = irq_data->args_count;
+
+ for (i = 0; i < irq_data->args_count; i++)
+ fwspec->param[i] = irq_data->args[i];
+}
+
unsigned int irq_create_of_mapping(struct of_phandle_args *irq_data)
{
+ struct irq_fwspec fwspec;
struct irq_domain *domain;
irq_hw_number_t hwirq;
unsigned int type = IRQ_TYPE_NONE;
int virq;
- domain = irq_data->np ? irq_find_host(irq_data->np) : irq_default_domain;
+ of_phandle_args_to_fwspec(irq_data, &fwspec);
+
+ if (fwspec.fwnode)
+ domain = irq_find_matching_fwnode(fwspec.fwnode, DOMAIN_BUS_ANY);
+ else
+ domain = irq_default_domain;
+
if (!domain) {
pr_warn("no irq domain found for %s !\n",
- of_node_full_name(irq_data->np));
+ of_node_full_name(to_of_node(fwspec.fwnode)));
return 0;
}
- /* If domain has no translation, then we assume interrupt line */
- if (domain->ops->xlate == NULL)
- hwirq = irq_data->args[0];
- else {
- if (domain->ops->xlate(domain, irq_data->np, irq_data->args,
- irq_data->args_count, &hwirq, &type))
- return 0;
- }
+ if (irq_domain_translate(domain, &fwspec, &hwirq, &type))
+ return 0;
if (irq_domain_is_hierarchy(domain)) {
+ /* Temporary hack */
+ void *desc = &fwspec;
+#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
+ if (!domain->ops->translate)
+ desc = irq_data;
+#endif
/*
* If we've already configured this interrupt,
* don't do it again, or hell will break loose.
@@ -516,7 +553,7 @@ unsigned int irq_create_of_mapping(struct of_phandle_args *irq_data)
if (virq)
return virq;
- virq = irq_domain_alloc_irqs(domain, 1, NUMA_NO_NODE, irq_data);
+ virq = irq_domain_alloc_irqs(domain, 1, NUMA_NO_NODE, desc);
if (virq <= 0)
return 0;
} else {