Pci — Device Driver

But hardware alone is inert. The true intelligence lies in the —the software layer that translates the operating system's generic requests into specific commands the hardware understands.

// 1. Enable the PCI device pci_enable_device(pdev); // 2. Request ownership of memory regions (BARs) pci_request_regions(pdev, "my_driver"); pci device driver

static struct pci_driver my_pci_driver = .name = "my_pci_driver", .id_table = my_ids, .probe = my_probe, .remove = my_remove, ; But hardware alone is inert

// 5. Set up interrupt handler request_irq(pdev->irq, my_interrupt_handler, IRQF_SHARED, "my_driver", dev); .id_table = my_ids

// 6. Initialize device-specific state my_device_init(regs);