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irqdomain: Implement a method to automatically call parent domains alloc/free

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Add a flags to irq_domain.flags to control whether the irqdomain core
should automatically call parent irqdomain's alloc/free callbacks. It
help to reduce hierarchy irqdomains users' code size.

Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Grant Likely <grant.likely@linaro.org>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Yijing Wang <wangyijing@huawei.com>
Cc: Yingjoe Chen <yingjoe.chen@mediatek.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Matthias Brugger <matthias.bgg@gmail.com>
Link: http://lkml.kernel.org/r/1416061447-9472-4-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Jiang Liu 2014-11-15 22:24:01 +08:00 • committed by Thomas Gleixner
parent 1b5377087c
commit 36d727310c
2 changed files with 89 additions and 17 deletions
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24
include/linux/irqdomain.h
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@ -134,6 +134,9 @@ enum {
/* Irq domain is hierarchical */
IRQ_DOMAIN_FLAG_HIERARCHY = (1 << 0),
/* Core calls alloc/free recursive through the domain hierarchy. */
IRQ_DOMAIN_FLAG_AUTO_RECURSIVE = (1 << 1),
/*
* Flags starting from IRQ_DOMAIN_FLAG_NONCORE are reserved
* for implementation specific purposes and ignored by the
@ -285,22 +288,13 @@ extern void irq_domain_free_irqs_common(struct irq_domain *domain,
extern void irq_domain_free_irqs_top(struct irq_domain *domain,
unsigned int virq, unsigned int nr_irqs);
static inline int irq_domain_alloc_irqs_parent(struct irq_domain *domain,
unsigned int irq_base,
unsigned int nr_irqs, void *arg)
{
if (domain->parent && domain->parent->ops->alloc)
return domain->parent->ops->alloc(domain->parent, irq_base,
nr_irqs, arg);
return -ENOSYS;
}
extern int irq_domain_alloc_irqs_parent(struct irq_domain *domain,
unsigned int irq_base,
unsigned int nr_irqs, void *arg);
static inline void irq_domain_free_irqs_parent(struct irq_domain *domain,
unsigned int irq_base, unsigned int nr_irqs)
{
if (domain->parent && domain->parent->ops->free)
domain->parent->ops->free(domain->parent, irq_base, nr_irqs);
}
extern void irq_domain_free_irqs_parent(struct irq_domain *domain,
unsigned int irq_base,
unsigned int nr_irqs);
static inline bool irq_domain_is_hierarchy(struct irq_domain *domain)
{