CN203241876U - Self-adaptive configuration PCIE expansion box - Google Patents

Abstract

The utility model discloses a PCIE expansion box with adaptive configuration, which is composed of a HOSTPCIE interface, a PCIESwitch, several PCIESlots and an MCU, the HOSTPCIE interface is connected with several PCIESlots through the PCIESwitch, and the PCIESwitch is connected with the MCU through a configuration bus. The MCU is used to detect the presence status of PCIE devices set in PCIESlot, and adaptively configure the working mode of PCIESwitch according to the presence status of PCIE devices and user configuration policies, thereby ensuring the normal operation of each device. The circuit structure and design idea of the PCLE expansion box can be applied to any server system, and can also be extended to be applied to PC systems, which can maximize the number of PCLE devices and meet high-performance application requirements.

Description

A PCIE expansion box with adaptive configuration

technical field

The utility model relates to the technical field of computers, in particular to an adaptively configured PCIE expansion box.

Background technique

PCIE is a new generation of bus interface, which adopts the current popular point-to-point serial connection in the industry. Compared with the shared parallel architecture of PCI and early computer buses, each device has its own dedicated connection and does not need to request bandwidth from the entire bus. Raise the data transfer rate to a very high frequency to achieve high bandwidth that PCI cannot provide. The PCIE specification is connected from 1 channel to 32 channels, and has very strong scalability to meet the different requirements of different system devices for data transmission bandwidth. In terms of form, X1 PCIE and X16 PCIE have become the mainstream specifications of PCIE. In addition, PCIE also supports high-level power management, supports hot plugging, supports synchronous data transmission, and optimizes bandwidth for priority data transmission.

Take the X16 PCIE interface provided by the upstream host as an example. According to the traditional design method, only 1 X16 PCIE interface can be provided or split into 2 X8 PCIE interfaces (or 1 X8 and 2 X4 interfaces, 4 X4 interfaces, etc. ). In practical applications, high-bandwidth devices such as GPU cards and high-end graphics cards only support X16 interfaces. mostly X8 devices). In order to meet the needs of different customers, the traditional design method often adopts the form of multiple product configurations, and configures different PCIE expansion boxes according to different customer needs, resulting in waste of design, and also brings a lot of inconvenience to customers for maintenance and upgrading.

Utility model content

The utility model discloses an adaptively configured PCIE expansion box aiming at the shortcomings of the prior art.

The PCIE expansion box of adaptive configuration disclosed by the utility model adopts the following technical scheme to solve the problem: it is composed of HOST PCIE interface, PCIE Switch, some PCIE Slots and MCU, and the HOST PCIE interface is connected with some PCIE slots through the PCIE Switch. The Slot is connected, and the PCIE Switch is connected to the MCU through the configuration bus, and the MCU is used to detect the presence status of the PCIE device set in the PCIE Slot, and adaptively configure the PCIE Switch according to the PCIE device presence status and user configuration strategy. Operating mode.

The beneficial effect of the adaptively configured PCIE expansion box disclosed by the utility model is that the circuit structure and design idea of the PCLE expansion box can be applied to any server system, and can also be extended and applied to PC systems, and can expand PCLE equipment to the greatest extent. Quantity, and can meet the high-performance application requirements.

Description of drawings

Accompanying drawing 1 is the realization principle block diagram of PCIE expansion box described in the utility model.

Detailed ways

Below in conjunction with accompanying drawing and embodiment, the PCIE expansion box of self-adaptive configuration disclosed by the utility model is described in further detail.

Example:

The PCIE expansion box described in the utility model can meet different customer needs through adaptive configuration switching, and the realization principle of the selected embodiment is shown in Figure 1. Slot (PCIE Slot 1, PCIE Slot 2 and PCIE Slot 3) and MCU, the HOST PCIE interface is connected to the three PCIE Slots through the PCIE Switch, the PCIE Switch is connected to the MCU through the configuration bus, and the MCU is used to detect Measure the presence status of the PCIE devices set in the PCIE Slot, and adaptively configure the working mode of the PCIE Switch according to the PCIE device presence status and user configuration policies, so as to ensure the normal operation of each device.

The following gives an optimal configuration strategy for the situation where the PCIE expansion box has three PCIE Slots: 1. There is only one PCIE device, and the PCIE Switch port is configured as the corresponding bandwidth mode; 2. Two PCIE devices are in place, according to different In position status, the following three modes can be configured: Slot1 X8+Slot2 X8; Slot1 X8+Slot3 X4; Slot2 X8+Slot3 X4; 3. Three PCIE devices are in position, configured as the following mode: Slot1 X8+Slot2 X4+Slot3 X4.

Except the technical characterictic described in the utility model, be the known technology of those skilled in the art.

Claims (1)

1. A PCIE expansion box of self-adaption configuration, is characterized in that, is made up of HOST PCIE interface, PCIE Switch, some PCIE Slots and MCU, described HOST PCIE interface is connected with some PCIE Slots by PCIE Switch, and described PCIE Switch passes through The configuration bus is connected to the MCU, and the MCU is used to detect the presence state of the PCIE device set in the PCIE Slot, and adaptively configure the working mode of the PCIE Switch according to the presence state of the PCIE device and the user configuration strategy.

Images