pci warningcard request irq
本帖最后由 zhangxujun1981 于 2010-12-20 09:43 编辑 平台: linux2.6.34.7 s3c6410 我调用request_irq去申请一个中断,即端口GPP9, 但是失败了,提示-EINVAL;所以我想跟踪分析是什么原因. 程序如下: irq_misc=irq_EINT_GROUP(8,9); ret = request_irq( irq_misc, irq_handle,irqF_DISABLED, DEVICE,my_dev); (我测试了一下使用其他中断,如irq_misc=irq_EINT(14);是可以成功的) request_irq -> request_threaded_irq(linux/ker...
by zhangxujun1981 - 嵌入式开发 - 2010-12-21 10:20:01 阅读（5466） 回复（4）
Kernel中断处理模型结构图如下： 下面简单介绍一下： 1． Linux定义了名字为irq_desc的中断例程描述符表：(include/linux/irq.h) struct irqdesc irq_desc[NR_irqS]; NR_irqS表示中断源的数目。 2． irq_desc［］是一个指向irq_desc_t结构的数组， irq_desc_t结构是各个设备中断服务例程的描述符。irq_desc_t结构体中的成员action指向该中断号对应的irqaction结构体链表。irqaction结构体定义如下： /* include/linux/inter...
warning: passing arg 2 of `request_irq' from incompatible pointer type linux-2.6.24/include/linux/interrupt.h --------------------------------------------------- extern int __must_check request_irq(unsigned int, irq_handler_t handler, unsigned long, const char *, void *); typedef irqreturn_t (*irq_handler_t)(int, void *); linux-2.6.10/include/linux/interrupt.h ----------------------...
int request_irq( unsigned int irq, irqreturn_t (*handler)(int, void *, struct pt_regs *), unsigned long flags, const char *dev_name, void *dev_id ); const char *dev_name 这个是一个字符串，它的作用是什么？ 在什么目录下可以看到?(我试了下，好像在 /proc/interrupts 下面是看不到的)
目前正在调试一款设备，此设备支持中断模式，即插入pci槽后，系统自动分配中断号。由于其他原因，我需要把中断模式改为轮询模式，目前这么操作的不注册中断处理函数，在程序中顺序执行，while等待如果是自己的中断清中断然后拷贝数据。压力测试中提示 Jul 18 17:09:56 ubuntu kernel: [ 1942.318771] pcidemo: probe of 0000:03:00.0 failed with error -1 Jul 18 17:11:07 ubuntu kernel: [ 2013.409141] irq 16: nobody cared (t...
Linux 内核提供了两个注册中断处理函数的接口：setup_irq和request_irq。这两个函数都定义在kernel/irq/manage.c里。 /* * Internal function to register an irqaction - typically used to * allocate special interrupts that are part of the architecture. */ int setup_irq(unsigned int irq, struct irqaction *new); /* * request_irq - allocate an interrupt line * This call allocates interrupt resourc...
Author: Dongas Data: 08-07-19 Linux 内核提供了两个注册中断处理函数的接口：setup_irq和request_irq。这两个函数都定义在kernel/irq/manage.c里。 /* * Internal function to register an irqaction - typically used to * allocate special interrupts that are part of the architecture. */ int setup_irq(unsigned int irq, struct irqaction *new); /* * request_irq - allocate an interrupt line * This ...
Author: Dongas Data: 08-07-19 Linux 内核提供了两个注册中断处理函数的接口：setup_irq和request_irq。这两个函数都定义在kernel/irq/manage.c里。 /* * Internal function to register an irqaction - typically used to * allocate special interrupts that are part of the architecture. */ int setup_irq(unsigned int irq, struct irqaction *new); /* * request_irq - allocate an interrupt line * This ...
Linux 内核提供了两个注册中断处理函数的接口：setup_irq和request_irq。这两个函数都定义在kernel/irq/manage.c里。 /* * Internal function to register an irqaction - typically used to * allocate special interrupts that are part of the architecture. */ int setup_irq(unsigned int irq, struct irqaction *new); /* * request_irq - allocate an interrupt line * This call allocates interrupt resourc...
request_irq和setup_irq的区别 Author: Dongas Data: 08-07-19 Linux 内核提供了两个注册中断处理函数的接口：setup_irq和request_irq。这两个函数都定义在kernel/irq/manage.c里。 /* * Internal function to register an irqaction - typically used to * allocate special interrupts that are part of the architecture. */ int setup_irq(unsigned int irq, struct irqaction *new); /* * request_irq - allocate ...
