程序笔记

PCIe配置空间（PCIE Configuration Space） – 类型码（Class Code）

2024-07-19 105

前言

PCIe配置空间（PCIE Configuration Space）中的类型码（Class Code），记录了PCIe类型设备的类型、子类型和功能，不同的PCIe设备，根据其类型和功能，有不同的类型码、子类型码和功能码。

PCIe配置空间

PCIE Configuration Space

Class Code

Class Code	The upper byte (at offset 0Bh) is a base class code which broadly classifies the type of function the device performs
	The middle byte (at offset 0Ah) is a sub-class code which identifies more specifically the function of the device
	The lower byte (at offset 09h) identifies a specific register-level programming interface (if any) so that device independent software can interact with the device

Class Code（类型码）, Subclass（子类型码）, 和Prog IF寄存器分别用于标识设备的类型、设备的功能和设备的寄存器级编程接口。下表列出了可能的设备类型：

Class Code	Description
0x00	Device was built prior definition of the class code field
0x01	Mass Storage Controller
0x02	Network Controller
0x03	Display Controller
0x04	Multimedia Controller
0x05	Memory Controller
0x06	Bridge Device
0x07	Simple Communication Controllers
0x08	Base System Peripherals
0x09	Input Devices
0x0A	Docking Stations
0x0B	Processors
0x0C	Serial Bus Controllers
0x0D	Wireless Controllers
0x0E	Intelligent I/O Controllers
0x0F	Satellite Communication Controllers
0x10	Encryption/Decryption Controllers
0x11	Data Acquisition and Signal Processing Controllers
0x12 ~ 0xFE	Reserved
0xFF	Device does not fit any defined class.

下表列出了PCI(e)可能的设备功能：

Class Code (offset 0x0B)	Sub-class (offset 0x0A)	ProgIF (offset 0x09)	Description
0x00	0x00	0x00	Any device except for VGA-Compatible devices
0x00	0x01	0x00	VGA-Compatible Device
0x01	0x00	0x00	SCSI Bus Controller
	0x01	0x–	IDE Controller
	0x02	0x00	Floppy Disk Controller
	0x03	0x00	IPI Bus Controller
	0x04	0x00	RAID Controller
	0x05	0x20	ATA Controller (Single DMA)
	0x05	0x30	ATA Controller (Chained DMA)
	0x06	0x00	Serial ATA (Vendor Specific Interface)
	0x06	0x01	Serial ATA (AHCI 1.0)
	0x07	0x00	Serial Attached SCSI (SAS)
	0x80	0x00	Other Mass Storage Controller
0x02	0x00	0x00	Ethernet Controller
	0x01	0x00	Token Ring Controller
	0x02	0x00	FDDI Controller
	0x03	0x00	ATM Controller
	0x04	0x00	ISDN Controller
	0x05	0x00	WorldFip Controller
	0x06	0x–	PICMG 2.14 Multi Computing
	0x80	0x00	Other Network Controller
0x03	0x00	0x00	VGA-Compatible Controller
	0x00	0x01	8512-Compatible Controller
	0x01	0x00	XGA Controller
	0x02	0x00	3D Controller (Not VGA-Compatible)
	0x80	0x00	Other Display Controller
0x04	0x00	0x00	Video Device
	0x01	0x00	Audio Device
	0x02	0x00	Computer Telephony Device
	0x03	0x00	Multimedia Device
0x05	0x00	0x00	RAM Controller
	0x01	0x00	Flash Controller
	0x80	0x00	Other Memory Controller
0x06	0x00	0x00	Host Bridge
	0x01	0x00	ISA Bridge
	0x02	0x00	EISA Bridge
	0x03	0x00	MCA Bridge
	0x04	0x00	PCI-to-PCI Bridge
	0x04	0x01	PCI-to-PCI Bridge (Subtractive Decode)
	0x05	0x00	PCMCIA Bridge
	0x06	0x00	NuBus Bridge
	0x07	0x00	CardBus Bridge
	0x08	0x–	RACEway Bridge
	0x09	0x40	PCI-to-PCI Bridge (Semi-Transparent, Primary)
	0x09	0x80	PCI-to-PCI Bridge (Semi-Transparent, Secondary)
	0x0A	0x00	InfiniBrand-to-PCI Host Bridge
	0x80	0x00	Other Bridge Device
0x07	0x00	0x00	Generic XT-Compatible Serial Controller
		0x01	16450-Compatible Serial Controller
		0x02	16550-Compatible Serial Controller
		0x03	16650-Compatible Serial Controller
		0x04	16750-Compatible Serial Controller
		0x05	16850-Compatible Serial Controller
		0x06	16950-Compatible Serial Controller
	0x01	0x00	Parallel Port
		0x01	Bi-Directional Parallel Port
		0x02	ECP 1.X Compliant Parallel Port
		0x03	IEEE 1284 Controller
		0xFE	IEEE 1284 Target Device
	0x02	0x00	Multiport Serial Controller
	0x03	0x00	Generic Modem
		0x01	Hayes Compatible Modem (16450-Compatible Interface)
		0x02	Hayes Compatible Modem (16550-Compatible Interface)
		0x03	Hayes Compatible Modem (16650-Compatible Interface)
		0x04	Hayes Compatible Modem (16750-Compatible Interface)
	0x04	0x00	IEEE 488.1/2 (GPIB) Controller
	0x05	0x00	Smart Card
	0x80	0x00	Other Communications Device
0x08	0x00	0x00	Generic 8259 PIC
		0x01	ISA PIC
		0x02	EISA PIC
		0x10	I/O APIC Interrupt Controller
		0x20	I/O(x) APIC Interrupt Controller
	0x01	0x00	Generic 8237 DMA Controller
		0x01	ISA DMA Controller
		0x02	EISA DMA Controller
	0x02	0x00	Generic 8254 System Timer
		0x01	ISA System Timer
		0x02	EISA System Timer
	0x03	0x00	Generic RTC Controller
	0x03	0x01	ISA RTC Controller
	0x04	0x00	Generic PCI Hot-Plug Controller
	0x80	0x00	Other System Peripheral
0x09	0x00	0x00	Keyboard Controller
	0x01	0x00	Digitizer
	0x02	0x00	Mouse Controller
	0x03	0x00	Scanner Controller
	0x04	0x00	Gameport Controller (Generic)
	0x04	0x10	Gameport Contrlller (Legacy)
	0x80	0x00	Other Input Controller
0x0A	0x00	0x00	Generic Docking Station
0x0A	0x80	0x00	Other Docking Station
0x0B	0x00	0x00	386 Processor
	0x01	0x00	486 Processor
	0x02	0x00	Pentium Processor
	0x10	0x00	Alpha Processor
	0x20	0x00	PowerPC Processor
	0x30	0x00	MIPS Processor
	0x40	0x00	Co-Processor
0x0C	0x00	0x00	IEEE 1394 Controller (FireWire)
	0x00	0x10	IEEE 1394 Controller (1394 OpenHCI Spec)
	0x01	0x00	ACCESS.bus
	0x02	0x00	SSA
	0x03	0x00	USB (Universal Host Controller Spec)
		0x10	USB (Open Host Controller Spec)
		0x20	USB2 Host Controller (Intel Enhanced Host Controller Interface)
		0x30	USB3 XHCI Controller
		0x80	Unspecified USB Controller
	0xFE	USB (Not Host Controller)
	0x04	0x00	Fibre Channel
	0x05	0x00	SMBus
	0x06	0x00	InfiniBand
	0x07	0x00	IPMI SMIC Interface
		0x01	IPMI Kybd Controller Style Interface
		0x02	IPMI Block Transfer Interface
	0x08	0x00	SERCOS Interface Standard (IEC 61491)
0x09	0x00	CANbus
0x0D	0x00	0x00	iRDA Compatible Controller
	0x01	0x00	Consumer IR Controller
	0x10	0x00	RF Controller
	0x11	0x00	Bluetooth Controller
	0x12	0x00	Broadband Controller
	0x20	0x00	Ethernet Controller (802.11a)
	0x21	0x00	Ethernet Controller (802.11b)
	0x80	0x00	Other Wireless Controller
0x0E	0x00	0x–	I20 Architecture
0x0E	0x00	0x00	Message FIFO
0x0F	0x01	0x00	TV Controller
	0x02	0x00	Audio Controller
	0x03	0x00	Voice Controller
	0x04	0x00	Data Controller
0x10	0x00	0x00	Network and Computing Encrpytion/Decryption
	0x10	0x00	Entertainment Encryption/Decryption
	0x80	0x00	Other Encryption/Decryption
0x11	0x00	0x00	DPIO Modules
	0x01	0x00	Performance Counters
	0x10	0x00	Communications Syncrhonization Plus Time and Frequency Test/Measurment
	0x20	0x00	Management Card
	0x80	0x00	Other Data Acquisition/Signal Processing Controller

更新于：4个月前

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