linux pci中断处理

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/interrupt.h>

static irqreturn_t my_pci_isr(int irq, void *dev_id) {
    printk(KERN_INFO "PCI Interrupt Received!\n");
    // 在这里添加中断处理逻辑
    return IRQ_HANDLED;
}

static int __init my_pci_init(void) {
    struct pci_dev *pdev;
    int ret;

    pdev = pci_find_device(0x1234, 0x5678, NULL); // 替换为实际的Vendor ID和Device ID
    if (!pdev) {
        printk(KERN_ERR "PCI Device not found!\n");
        return -ENODEV;
    }

    ret = request_irq(pdev->irq, my_pci_isr, IRQF_SHARED, "my_pci_isr", pdev);
    if (ret) {
        printk(KERN_ERR "Failed to request IRQ %d\n", pdev->irq);
        return ret;
    }

    printk(KERN_INFO "PCI Interrupt Handler Registered!\n");
    return 0;
}

static void __exit my_pci_exit(void) {
    struct pci_dev *pdev;

    pdev = pci_find_device(0x1234, 0x5678, NULL); // 替换为实际的Vendor ID和Device ID
    if (pdev) {
        free_irq(pdev->irq, pdev);
        printk(KERN_INFO "PCI Interrupt Handler Unregistered!\n");
    }
}

module_init(my_pci_init);
module_exit(my_pci_exit);

MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("PCI Interrupt Handling Example");