Function report

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\irq\irqdomain.c Create Date:2022-07-28 10:14:10
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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Name:irq_domain_alloc_descs

Proto:int irq_domain_alloc_descs(int virq, unsigned int cnt, irq_hw_number_t hwirq, int node, const struct irq_affinity_desc *affinity)

Type:int

Parameter:

TypeParameterName
intvirq
unsigned intcnt
irq_hw_number_thwirq
intnode
const struct irq_affinity_desc *affinity
1015  If virq >= 0 Then
1016  virq = __irq_alloc_descs - allocate and initialize a range of irq descriptors*@irq: Allocate for specific irq number if irq >= 0*@from: Start the search from this irq number*@cnt: Number of consecutive irqs to allocate
1018  Else
1019  hint = hwirq % nr_irqs
1020  If hint == 0 Then hint++
1022  virq = __irq_alloc_descs - allocate and initialize a range of irq descriptors*@irq: Allocate for specific irq number if irq >= 0*@from: Start the search from this irq number*@cnt: Number of consecutive irqs to allocate
1024  If virq <= 0 && hint > 1 Then
1025  virq = __irq_alloc_descs - allocate and initialize a range of irq descriptors*@irq: Allocate for specific irq number if irq >= 0*@from: Start the search from this irq number*@cnt: Number of consecutive irqs to allocate
1030  Return virq
Caller
NameDescribe
irq_create_mappingq_create_mapping() - Map a hardware interrupt into linux irq space*@domain: domain owning this hardware interrupt or NULL for default domain*@hwirq: hardware irq number in that domain space* Only one mapping per hardware interrupt is permitted
irq_reserve_ipiq_reserve_ipi() - Setup an IPI to destination cpumask*@domain: IPI domain*@dest: cpumask of cpus which can receive the IPI* Allocate a virq that can be used to send IPI to any CPU in dest mask