linux 网卡驱动 中断

// 示例代码：设置中断亲和性
#include <linux/interrupt.h>
#include <linux/module.h>

irqreturn_t my_interrupt_handler(int irq, void *dev_id) {
    // 中断处理逻辑
    return IRQ_HANDLED;
}

static int __init my_module_init(void) {
    int ret;
    ret = request_irq(irq_number, my_interrupt_handler, IRQF_SHARED, "my_irq", NULL);
    if (ret) {
        printk(KERN_ERR "Failed to request IRQ %d\n", irq_number);
        return ret;
    }

    irq_set_affinity_hint(irq_number, cpumask_of(some_cpu));
    return 0;
}

// 示例代码：启用DMA
#include <linux/dmaengine.h>

static int dma_setup(struct device *dev) {
    struct dma_chan *chan;
    dma_cap_mask_t mask;

    dma_cap_zero(mask);
    dma_cap_set(DMA_MEMCPY, mask);

    chan = dma_request_channel(mask, NULL, dev_name(dev));
    if (!chan) {
        printk(KERN_ERR "Failed to get DMA channel\n");
        return -ENODEV;
    }

    // 配置DMA传输参数并启动
    return 0;
}