Commit afb7da83 authored by Jiang Liu's avatar Jiang Liu Committed by Thomas Gleixner
Browse files

irqdomain: Introduce helper function irq_domain_add_hierarchy() 



Introduce helper function irq_domain_add_hierarchy(), which creates
a linear irqdomain if parameter 'size' is not zero, otherwise creates
a tree irqdomain.

Signed-off-by: default avatarJiang 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/1416061447-9472-5-git-send-email-jiang.liu@linux.intel.com


Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
parent 36d72731

include/linux/irqdomain.h

+4 −0
Original line number Diff line number Diff line
@@ -259,6 +259,10 @@ int irq_domain_xlate_onetwocell(struct irq_domain *d, struct device_node *ctrlr, 
extern struct irq_data *irq_domain_get_irq_data(struct irq_domain *domain,

						unsigned int virq);

#ifdef	CONFIG_IRQ_DOMAIN_HIERARCHY

extern struct irq_domain *irq_domain_add_hierarchy(struct irq_domain *parent,

			unsigned int flags, unsigned int size,

			struct device_node *node,

			const struct irq_domain_ops *ops, void *host_data);

extern int __irq_domain_alloc_irqs(struct irq_domain *domain, int irq_base,

				   unsigned int nr_irqs, int node, void *arg,

				   bool realloc);

kernel/irq/irqdomain.c

+36 −0
Original line number Diff line number Diff line
@@ -742,6 +742,42 @@ static int irq_domain_alloc_descs(int virq, unsigned int cnt, 
}



#ifdef	CONFIG_IRQ_DOMAIN_HIERARCHY

/**

 * irq_domain_add_hierarchy - Add a irqdomain into the hierarchy

 * @parent:	Parent irq domain to associate with the new domain

 * @flags:	Irq domain flags associated to the domain

 * @size:	Size of the domain. See below

 * @node:	Optional device-tree node of the interrupt controller

 * @ops:	Pointer to the interrupt domain callbacks

 * @host_data:	Controller private data pointer

 *

 * If @size is 0 a tree domain is created, otherwise a linear domain.

 *

 * If successful the parent is associated to the new domain and the

 * domain flags are set.

 * Returns pointer to IRQ domain, or NULL on failure.

 */

struct irq_domain *irq_domain_add_hierarchy(struct irq_domain *parent,

					    unsigned int flags,

					    unsigned int size,

					    struct device_node *node,

					    const struct irq_domain_ops *ops,

					    void *host_data)

{

	struct irq_domain *domain;



	if (size)

		domain = irq_domain_add_linear(node, size, ops, host_data);

	else

		domain = irq_domain_add_tree(node, ops, host_data);

	if (domain) {

		domain->parent = parent;

		domain->flags |= flags;

	}



	return domain;

}



static void irq_domain_insert_irq(int virq)

{

	struct irq_data *data;

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