如上图所示:所有的根总线都链接在pci_root_buses链表中. Pci_bus ->device链表链接着该总线下的所有设备.而pci_bus->children链表链接着它的下层总线. 对于pci_dev来说,pci_dev->bus指向它所属的pci_bus. Pci_dev->bus_list链接在它所属bus的device链表上.此外,所有pci设备都链接在pci_device链表中. 三:...
如上图所示:所有的根总线都链接在pci_root_buses链表中. Pci_bus ->device链表链接着该总线下的所有设备.而pci_bus->children链表链接着它的下层总线. 对于pci_dev来说,pci_dev->bus指向它所属的pci_bus. Pci_dev->bus_list链接在它所属bus的device链表上.此外,所有pci设备都链接在pci_device链表中. 三:...
pci_assign_unassigned_bus_resources(bus); #ifndef CONFIG_MICROBLAZE pci_fixup_irqs(pci_common_swizzle, of_irq_parse_and_map_pci); #endif list_for_each_entry(child, &bus->children, node) pcie_bus_configure_settings(child); // 扫描PCIe设备 pci_bus_add_devices(bus); return 0; 1. 2. ...
其中很重要的几个调用函数为 pci_create_root_bus,负责创建root bus,还有一个是 pci_scan_child_bus,负责扫描host bridge下的整个pci树,在此不再赘述。 我们暂且不讨论 pci_root_handler这个 acpi_scan_handler 是怎么添加到 全局的handler中去,仅以其handler中的 attach 函数作为根,也就是acpi_pci_root_add函...
pci_bus_add_devices(pci_root_bus); pcibios_fixup_peer_bridges(); return 0; } 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. pci_legacy_init函数 首先--扫描0号总线, 扫描成功,则把0号总线作为系统的根总线 ...
pci_dev结构,在这个结构中有一个device成员,并将这些pci_dev结构链接到PCI总线描述符上的devices链。如下图所示: [attach]226529[/attach] 第二步是当PCI驱动被加载时,pci_driver结构体将被初始化,这一过程在函数pci_register_driver中: drv->driver.bus = &pci_bus_type; ...
pci_bus_add_devices(b);returnb; } 这里首先寻找bus总线号资源,前面在x86_pci_root_bus_resources函数中已经分配了,所以这里理论上是已经分配好了,不过还是验证下!!内核中总是精益求精。接着调用了pci_create_root_bus函数创建了对应的bus结构,然后调用pci_scan_child_bus函数遍历该总线下所有的子总线。最后就...
Unde this mode, NVMe devices are remapped into the SATA device and become hidden from the PCI bus, which means that Linux users cannot access their storage devices unless they go into the firmware setup menu to revert back to AHCI mode - assuming such option is available. Lack of support ...
pci_bus_assign_resources(bus); } /* * Tell drivers about devices found. */ pci_bus_add_devices(bus); } } 剧情梗概: 569行,pcibios_init_hw()函数初始化每一个controller,初始化它并且递归地枚举出它的子总线。在这个过程中会调用到.setup和.scan回调函数。如果需要,可以实现.preinit和.postinit这...
PCI bus masters. For example, while the CPU is fetching data from the cache controller in the host bridge, other PCI devices can also access the system memory through the host bridge. The advantage of this architecture lies in its separation of the I/O bus from the processor's host bus....