网络设备之pci_device_id

标准PCI设备都有一个配置寄存器，用来存储各种参数；

 /* pci设备配置寄存器 */
 struct pci_device_id {
     /* 厂商id，设备id */
     __u32 vendor, device;        /* Vendor and device ID or PCI_ANY_ID*/
     /* 子系统厂商id，子系统设备id */
     __u32 subvendor, subdevice;    /* Subsystem ID's or PCI_ANY_ID */
     /* 类，类掩码，使驱动程序可以指定支持某一种pci设备 */
     __u32 class, class_mask;    /* (class,subclass,prog-if) triplet */
     /* 保存于设备相关的私有信息 */
     kernel_ulong_t driver_data;    /* Data private to the driver */
 };

以e100为例，其支持多种设备，不同设备的pci_device_id初始化后存放在e100_id_table[]数组中；

e100_driver操作中的id_table字段会引用该数组；

 /* e100的pci设备信息结构列表 */
 #define INTEL_8255X_ETHERNET_DEVICE(device_id, ich) {\
     PCI_VENDOR_ID_INTEL, device_id, PCI_ANY_ID, PCI_ANY_ID, \
     PCI_CLASS_NETWORK_ETHERNET << , 0xFFFF00, ich }
 static const struct pci_device_id e100_id_table[] = {
     INTEL_8255X_ETHERNET_DEVICE(0x1029, ),
     INTEL_8255X_ETHERNET_DEVICE(0x1030, ),
     INTEL_8255X_ETHERNET_DEVICE(0x1031, ),
     INTEL_8255X_ETHERNET_DEVICE(0x1032, ),
     INTEL_8255X_ETHERNET_DEVICE(0x1033, ),
     INTEL_8255X_ETHERNET_DEVICE(0x1034, ),
     INTEL_8255X_ETHERNET_DEVICE(0x1038, ),
     INTEL_8255X_ETHERNET_DEVICE(0x1039, ),
     INTEL_8255X_ETHERNET_DEVICE(0x103A, ),
     INTEL_8255X_ETHERNET_DEVICE(0x103B, ),
     INTEL_8255X_ETHERNET_DEVICE(0x103C, ),
     INTEL_8255X_ETHERNET_DEVICE(0x103D, ),
     INTEL_8255X_ETHERNET_DEVICE(0x103E, ),
     INTEL_8255X_ETHERNET_DEVICE(0x1050, ),
     INTEL_8255X_ETHERNET_DEVICE(0x1051, ),
     INTEL_8255X_ETHERNET_DEVICE(0x1052, ),
     INTEL_8255X_ETHERNET_DEVICE(0x1053, ),
     INTEL_8255X_ETHERNET_DEVICE(0x1054, ),
     INTEL_8255X_ETHERNET_DEVICE(0x1055, ),
     INTEL_8255X_ETHERNET_DEVICE(0x1056, ),
     INTEL_8255X_ETHERNET_DEVICE(0x1057, ),
     INTEL_8255X_ETHERNET_DEVICE(0x1059, ),
     INTEL_8255X_ETHERNET_DEVICE(0x1064, ),
     INTEL_8255X_ETHERNET_DEVICE(0x1065, ),
     INTEL_8255X_ETHERNET_DEVICE(0x1066, ),
     INTEL_8255X_ETHERNET_DEVICE(0x1067, ),
     INTEL_8255X_ETHERNET_DEVICE(0x1068, ),
     INTEL_8255X_ETHERNET_DEVICE(0x1069, ),
     INTEL_8255X_ETHERNET_DEVICE(0x106A, ),
     INTEL_8255X_ETHERNET_DEVICE(0x106B, ),
     INTEL_8255X_ETHERNET_DEVICE(0x1091, ),
     INTEL_8255X_ETHERNET_DEVICE(0x1092, ),
     INTEL_8255X_ETHERNET_DEVICE(0x1093, ),
     INTEL_8255X_ETHERNET_DEVICE(0x1094, ),
     INTEL_8255X_ETHERNET_DEVICE(0x1095, ),
     INTEL_8255X_ETHERNET_DEVICE(0x10fe, ),
     INTEL_8255X_ETHERNET_DEVICE(0x1209, ),
     INTEL_8255X_ETHERNET_DEVICE(0x1229, ),
     INTEL_8255X_ETHERNET_DEVICE(0x2449, ),
     INTEL_8255X_ETHERNET_DEVICE(0x2459, ),
     INTEL_8255X_ETHERNET_DEVICE(0x245D, ),
     INTEL_8255X_ETHERNET_DEVICE(0x27DC, ),
     { , }
 };
 MODULE_DEVICE_TABLE(pci, e100_id_table);