函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\irq\irqdomain.c Create Date:2022-07-27 11:14:27
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：irq_domain_alloc_descs

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

返回类型：int

参数：

类型参数名称
intvirq
unsigned intcnt
irq_hw_number_thwirq
intnode
const struct irq_affinity_desc *affinity
1015  如果virq大于等于0则
1016  virq等于__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  否则
1019  hint等于hwirq取模nr_irqs
1020  如果hint恒等于0则hint自加
1022  virq等于__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  如果virq小于等于0且hint大于1则
1025  virq等于__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  返回:virq
调用者
名称描述
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