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author | Marc Zyngier <maz@kernel.org> | 2021-05-04 16:00:13 +0300 |
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committer | Marc Zyngier <maz@kernel.org> | 2021-06-10 15:09:18 +0300 |
commit | d22558dd0a6c888b1829f9d3a0a627e330e27585 (patch) | |
tree | c8b8ac1f4db942b3330890eb894500eedafb6376 /include/linux/irqdomain.h | |
parent | d4a45c68dc81f9117ceaff9f058d5fae674181b9 (diff) | |
download | linux-d22558dd0a6c888b1829f9d3a0a627e330e27585.tar.xz |
irqdomain: Introduce irq_resolve_mapping()
Rework irq_find_mapping() to return an both an irq_desc pointer,
optionally the virtual irq number, and rename the result to
__irq_resolve_mapping(). a new helper called irq_resolve_mapping()
is provided for code that doesn't need the virtual irq number.
irq_find_mapping() is also rewritten in terms of __irq_resolve_mapping().
Signed-off-by: Marc Zyngier <maz@kernel.org>
Diffstat (limited to 'include/linux/irqdomain.h')
-rw-r--r-- | include/linux/irqdomain.h | 23 |
1 files changed, 21 insertions, 2 deletions
diff --git a/include/linux/irqdomain.h b/include/linux/irqdomain.h index 2b696c9bcaaf..23e4ee523576 100644 --- a/include/linux/irqdomain.h +++ b/include/linux/irqdomain.h @@ -41,6 +41,7 @@ struct fwnode_handle; struct irq_domain; struct irq_chip; struct irq_data; +struct irq_desc; struct cpumask; struct seq_file; struct irq_affinity_desc; @@ -401,13 +402,31 @@ static inline unsigned int irq_create_mapping(struct irq_domain *host, return irq_create_mapping_affinity(host, hwirq, NULL); } +extern struct irq_desc *__irq_resolve_mapping(struct irq_domain *domain, + irq_hw_number_t hwirq, + unsigned int *irq); + +static inline struct irq_desc *irq_resolve_mapping(struct irq_domain *domain, + irq_hw_number_t hwirq) +{ + return __irq_resolve_mapping(domain, hwirq, NULL); +} + /** * irq_find_mapping() - Find a linux irq from a hw irq number. * @domain: domain owning this hardware interrupt * @hwirq: hardware irq number in that domain space */ -extern unsigned int irq_find_mapping(struct irq_domain *host, - irq_hw_number_t hwirq); +static inline unsigned int irq_find_mapping(struct irq_domain *domain, + irq_hw_number_t hwirq) +{ + unsigned int irq; + + if (__irq_resolve_mapping(domain, hwirq, &irq)) + return irq; + + return 0; +} static inline unsigned int irq_linear_revmap(struct irq_domain *domain, irq_hw_number_t hwirq) |